Device for retreating phenol waste gas of storage tank

Abstract

The utility model relates to a device for retreating phenol waste gas of a storage tank, which belongs to the technical field of chemical equipment and comprises a treatment box, a gas inlet pipe and an exhaust pipe are arranged on the treatment box, dissolving liquid and an auxiliary cover are arranged in the treatment box, the auxiliary cover is fixedly arranged in the treatment box, the gas inlet pipe is inserted into the auxiliary cover, and the exhaust pipe is inserted into the dissolving liquid. The auxiliary cover is immersed in the dissolving solution, the exhaust pipe is located above the dissolving solution, and a first air hole is formed in the top of the auxiliary cover. According to the phenol tail gas treatment device, phenol tail gas subjected to primary treatment is conveyed into a dissolving solution, so that the phenol tail gas reacts with the dissolving solution, secondary treatment of the phenol tail gas is realized, phenol is completely absorbed, and potential safety hazards caused by the fact that the phenol tail gas enters a tail gas recovery pipeline are avoided; bubbles formed by the phenol tail gas can be scattered, the contact area of the phenol tail gas and dissolved oxygen is increased, and then the secondary treatment effect of the phenol tail gas is improved.

Description

Technical Field

[0001] This utility model relates to a device for the reprocessing of phenol waste gas from storage tanks, belonging to the field of chemical equipment technology. Background Technology

[0002] Liquid chemical storage units are equipped with storage tanks to store liquid materials. When the liquid chemical is phenol, because its physicochemical properties are weakly acidic and slightly soluble in water, it is easy to produce chemical reactions when mixed with other materials. Therefore, the tail gas of this material needs to be pretreated by a water seal tank or spray tower before entering the tail gas recovery main pipe. The phenol tail gas is dissolved in an aqueous solution before entering the tail gas recovery system for treatment to prevent the phenol tail gas from reacting with other materials.

[0003] Utility model patent CN213965963U discloses an integrated phenol waste gas treatment device, belonging to the field of chemical equipment technology. It includes a spray tower, a separator, a plasma treatment device, a photo-oxidation purifier, and an activated carbon adsorption device. The spray tower, from top to bottom, has an outlet, a cyclone demister layer, spray heads, a packing layer, and an inlet pipe. Inspection holes are provided on the side of the spray tower. The spray tower, separator, plasma treatment device, photo-oxidation purifier, and activated carbon adsorption device are sequentially connected by pipes. A diffuser is connected to the bottom of the spray head. The diffuser is an inverted trumpet-shaped groove with numerous small holes densely distributed on its outer surface. This utility model has a simple structure and is easy to operate. The numerous small round holes densely distributed on the outer surface of the diffuser expand the spray range of the spray head, maximizing the contact between the sprayed liquid and the waste gas, thus improving purification efficiency while saving processing time. However, in the existing technology, due to the high flow rate and large volume of phenol tail gas generated when the storage tank is unloaded from the ship, a large amount of phenol tail gas is generated. During the spraying period, the water volume of the spray tower is limited, and the contact surface with the phenol tail gas is small. When encountering a large amount of tail gas, it is impossible to absorb all the phenol, which leads to the phenol tail gas entering the tail gas recovery pipeline, creating a significant safety hazard.

[0004] Therefore, there is a need for a device for the reprocessing of phenol exhaust gas from storage tanks, which is used for secondary treatment of phenol tail gas to prevent residual phenol from entering the tail gas recovery device. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide a device for secondary treatment of phenol tail gas and to prevent residual phenol from entering the tail gas recovery device, and a device for re-treatment of phenol waste gas from storage tanks.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: a device for re-treatment of phenol waste gas from storage tanks, including a treatment box, an air inlet pipe and an exhaust pipe provided on the treatment box, a dissolving liquid and an auxiliary cover provided inside the treatment box, the auxiliary cover being fixedly installed inside the treatment box, the air inlet pipe being inserted into the auxiliary cover, the auxiliary cover being submerged in the dissolving liquid, the exhaust pipe being located above the dissolving liquid, and a first air hole being provided on the top of the auxiliary cover.

[0007] Preferably, the side wall of the auxiliary cover is provided with a second air hole.

[0008] Preferably, the auxiliary mechanism includes a drive component and an auxiliary component. The auxiliary cover is cylindrical in shape and is vertically arranged. Multiple first and second air holes are provided. The drive component is used to drive the auxiliary component to rotate around the axis of the auxiliary cover.

[0009] The auxiliary component includes a first auxiliary unit and a second auxiliary unit, wherein the first auxiliary unit is used to cut off bubbles passing through the first vent, and the second auxiliary unit is used to cut off bubbles passing through the second vent.

[0010] The first auxiliary unit includes a first rotating plate and a first scraper. The first scraper is sealed and fitted to the top of the auxiliary cover. The first rotating plate is connected to the drive assembly. The first scraper is connected to the first rotating plate through a first elastic element, and the first elastic element exerts an upward thrust on the first scraper.

[0011] The second auxiliary unit includes a second rotating plate and a second scraper. The second scraper is sealed and fitted to the inner peripheral wall of the auxiliary box. The second rotating plate is connected to the drive assembly. The second scraper is connected to the second rotating plate through a second elastic element. The second elastic element exerts a thrust on the second scraper in a direction away from the axis of the auxiliary cover.

[0012] Preferably, the first elastic element includes a first guide rod and a first spring. The first guide rod passes vertically through the first rotating plate, and the top end of the first guide rod is fixedly disposed on the first scraper. The first spring is located between the first rotating plate and the first scraper, and the two ends of the first spring are respectively connected to the first rotating plate and the first scraper. The first spring is in a compressed state.

[0013] Preferably, a limiting block is fixedly provided at the bottom end of the first guide rod, and a gap is provided between the limiting block and the first rotating plate.

[0014] Preferably, the second elastic element includes a second guide rod and a second spring. The second guide rod passes horizontally through the second rotating plate. One end of the second guide rod is fixedly mounted on the second scraper, and the other end of the second guide rod is fixedly mounted on a connecting plate. The second spring is located between the connecting plate and the second rotating plate. The two ends of the second spring are respectively connected to the connecting plate and the second rotating plate, and the second spring is in a stretched state.

[0015] Preferably, there are two of each of the first and second elastic elements, with the two first elastic elements distributed horizontally and the two second elastic elements distributed vertically.

[0016] Preferably, the drive assembly includes a drive shaft, which is coaxially arranged with the auxiliary cover, and the drive shaft is driven by a drive source.

[0017] Preferably, the processing box includes a box body and a box lid, with the box lid covering the top of the box body.

[0018] Preferably, the solution is an aqueous solution of sodium hydroxide.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] 1. By transporting the phenol tail gas after primary treatment to the dissolving liquid, the phenol tail gas reacts with the dissolving liquid to achieve secondary treatment of the phenol tail gas, so that the phenol is completely absorbed and the phenol tail gas is prevented from entering the tail gas recovery pipeline and causing safety hazards.

[0021] 2. By using an auxiliary cover with a first vent and a second vent, the bubbles formed by phenol tail gas can be broken up, increasing the contact area between phenol tail gas and dissolved oxygen, thereby improving the secondary treatment effect of phenol tail gas.

[0022] 3. Use the first and second scrapers to cut off the air bubbles passing through the first and second air holes to ensure the air bubble dispersal effect;

[0023] 4. By rotating the auxiliary components inside the auxiliary hood, the dissolved liquid and air bubbles inside the auxiliary hood are stirred, which facilitates the reaction between the phenol tail gas and the dissolved liquid and improves the secondary treatment effect of the phenol tail gas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a device for reprocessing phenol waste gas from storage tanks according to the present invention;

[0025] Figure 2 This is a front view of an apparatus for reprocessing phenol waste gas from storage tanks according to the present invention.

[0026] Figure 3 This is a right view of an apparatus for reprocessing phenol waste gas from storage tanks according to the present invention.

[0027] Figure 4 This is a top view of an apparatus for reprocessing phenol waste gas from storage tanks according to the present invention;

[0028] Figure 5 This is a cross-sectional view of an apparatus for reprocessing phenol waste gas from storage tanks according to the present invention.

[0029] Figure 6 A three-dimensional view of the auxiliary cover;

[0030] Figure 7 A 3D view of the auxiliary components.

[0031] in:

[0032] Processing box 1, air inlet pipe 2, liquid filling pipe 3, liquid drain pipe 4, overflow pipe 5, exhaust pipe 6, auxiliary cover 7, auxiliary mechanism 8;

[0033] Box body 11, box lid 12;

[0034] First pore 71, second pore 72;

[0035] Driver component 81, auxiliary component 82;

[0036] Drive shaft 811, drive source 812;

[0037] First auxiliary unit 821, second auxiliary unit 822;

[0038] First rotating plate 8211, first scraper 8212, first elastic element 8213;

[0039] First guide rod 82131, first spring 82132, limit block 82133;

[0040] Second rotating plate 8221, second scraper 8222, second elastic element 8223;

[0041] Second guide rod 82231, second spring 82232, connecting plate 82233. Detailed Implementation

[0042] like Figure 1-7As shown, this embodiment of an apparatus for re-treatment of phenol waste gas from a storage tank includes a treatment tank 1. An inlet pipe 2 is fixedly inserted into the top of the treatment tank 1. A dissolving solution, which is an aqueous sodium hydroxide solution, is provided inside the treatment tank 1. A liquid addition pipe 3, a drain pipe 4, an overflow pipe 5, and an exhaust pipe 6 are provided on the treatment tank 1. The overflow pipe 5 and the exhaust pipe 6 are both located above the dissolving solution. An auxiliary cover 7 is provided inside the treatment tank 1. The bottom of the auxiliary cover 7 is open, and the bottom of the auxiliary cover 7 is sealed and fixedly installed inside the treatment tank 1. The inlet pipe 2 is inserted from the top of the auxiliary cover 7. The auxiliary cover 7 is immersed in the dissolving solution. Multiple first vents 71 are provided on the top of the auxiliary cover 7, and the multiple first vents 71 are evenly distributed circumferentially around the vertical centerline of the auxiliary cover 7, venting from a water seal tank or spray tower. The phenol tail gas, after primary treatment, is transported from the inlet pipe 2 to the cavity of the auxiliary hood 7 and forms bubbles. Utilizing the principle of acid-base neutralization, the phenol tail gas reacts with the sodium hydroxide aqueous solution, and the resulting sodium phenolate dissolves in the water, thus achieving the function of absorbing phenol waste gas, i.e., realizing the secondary treatment of phenol tail gas, so that phenol is completely absorbed. When the bubbles in the cavity of the auxiliary hood pass through the first air hole 71, they are broken into small bubbles. The small bubbles are transported to the cavity of the treatment box 1. After the small bubbles in the cavity of the treatment box 1 rise, they burst and are finally discharged from the exhaust pipe 6. In fact, the exhaust pipe 6 is connected to the tail gas treatment main pipe. The phenol tail gas after secondary treatment is discharged into the tail gas recovery device in the tank area for final collection and treatment. By breaking the bubbles into small bubbles, the contact area between the phenol tail gas and dissolved oxygen can be increased, thereby improving the secondary treatment effect of phenol tail gas.

[0043] When adding the dissolving solution, open the filling pipe 3 and the overflow pipe 5 to transfer the dissolving solution from the filling pipe 3 into the treatment tank 1 until dissolved oxygen can be discharged from the overflow pipe 5. Then stop adding the solution and close the filling pipe 3 and the overflow pipe 5. When draining the dissolving solution in the treatment tank 1, open the drain pipe 4 to drain the dissolving solution in the treatment tank 1 from the drain pipe 4. After draining, close the drain pipe 4.

[0044] The auxiliary cover 7 has multiple second air holes 72 on its side wall. In addition to being discharged from the first air hole 71, the air bubbles in the auxiliary box cavity can also be discharged from the second air holes 72 and broken up to form small air bubbles, ensuring the smooth delivery of phenol tail gas.

[0045] The processing box 1 is provided with an auxiliary mechanism 8, which is used to cut off the bubbles passing through the first air hole 71 and the second air hole 72, thereby improving the bubble dispersing effect.

[0046] The auxiliary mechanism 8 includes a drive component 81 and two auxiliary components 82. The auxiliary cover 7 is cylindrical in shape and is vertically arranged. The two auxiliary components 82 are evenly distributed circumferentially inside the auxiliary cover 7 with the axis of the auxiliary cover 7 as the center. The drive component 81 is used to drive the auxiliary components 82 to rotate around the axis of the auxiliary cover 7.

[0047] The auxiliary component 82 includes a first auxiliary unit 821 and a second auxiliary unit 822. The first auxiliary unit 821 is used to cut off the bubble passing through the first vent 71, and the second auxiliary unit 822 is used to cut off the bubble passing through the second vent 72.

[0048] The first auxiliary unit 821 includes a first rotating plate 8211 and a first scraper 8212. The first scraper 8212 is sealed and fitted to the top inside the auxiliary cover 7. The first rotating plate 8211 is located below the first scraper 8212. The first rotating plate 8211 is connected to the drive assembly 81. The bottom of the first scraper 8212 is connected to the first rotating plate 8211 through a first elastic member 8213. The first elastic member 8213 exerts an upward thrust on the first scraper 8212.

[0049] The first elastic element 8213 includes a first guide rod 82131 and a first spring 82132. The first guide rod 82131 passes vertically through the first rotating plate 8211. The top end of the first guide rod 82131 is fixedly disposed at the bottom of the first scraper 8212. The first spring 82132 is located between the first rotating plate 8211 and the first scraper 8212. The two ends of the first spring 82132 are respectively connected to the first rotating plate 8211 and the first scraper 8212. The first spring 82132 is sleeved on the first guide rod 82131 and is in a compressed state.

[0050] A limiting block 82133 is fixedly provided at the bottom end of the first guide rod 82131, and a gap is provided between the limiting block 82133 and the first rotating plate 8211;

[0051] Two first elastic elements 8213 are provided, and the two first elastic elements 8213 are horizontally distributed;

[0052] The second auxiliary unit 822 includes a second rotating plate 8221 and a second scraper 8222. The second scraper 8222 is sealed and fitted to the inner peripheral wall of the auxiliary box. The second rotating plate 8221 is located on the side of the second scraper 8222 closer to the axis of the auxiliary cover 7. The second rotating plate 8221 is connected to the drive assembly 81. The second rotating plate 8221 is fixedly mounted on the first rotating plate 8211. The side of the second scraper 8222 closer to the axis of the auxiliary cover 7 is connected to the second rotating plate 8221 through a second elastic member 8223. The second elastic member 8223 exerts a thrust on the second scraper 8222 in a direction away from the axis of the auxiliary cover 7.

[0053] The second elastic element 8223 includes a second guide rod 82231 and a second spring 82232. The second guide rod 82231 passes horizontally through the second rotating plate 8221. One end of the second guide rod 82231 is fixedly mounted on the second scraper 8222, and the other end of the second guide rod 82231 is fixedly mounted on a connecting plate 82233. The second spring 82232 is located between the connecting plate 82233 and the second rotating plate 8221. Both ends of the second spring 82232 are respectively connected to the connecting plate 82233 and the second rotating plate 8221. The second spring 82232 is sleeved on the second guide rod 82231 and is in a stretched state.

[0054] Two second elastic elements 8223 are provided, and the two second elastic elements 8223 are distributed vertically.

[0055] The drive assembly 81 includes a drive shaft 811, which is coaxially arranged with the auxiliary cover 7. The first rotating plate 8211 is fixedly arranged on the drive shaft 811. The drive shaft 811 is driven by a drive source 812, which can be a motor. The housing of the motor is fixedly arranged at the bottom of the processing box 1.

[0056] When the motor starts, the drive shaft 811 drives the first rotating plate 8211 to rotate. The rotation of the first rotating plate 8211 drives the first scraper 8212 to rotate via the first guide rod 82131. The first scraper 8212 intermittently seals the first air hole 71. Calculations show that during the rotation of the first guide rod 82131, at least one first air hole 71 is in a clear state. Thus, when the first guide rod 82131 seals the first air hole 71, the air bubbles entering the first air hole 71 are cut off, ensuring that the air bubbles passing through the first air hole 71 are dispersed. The rotation of the first rotating plate 8211 also drives the second rotating plate 8221 to rotate. The rotation of the second rotating plate 8221 drives the second scraper 8222 to rotate via the second guide rod 82231. Similarly, the rotation of the second scraper 8222 cuts off the air bubbles entering the second air hole 72, ensuring that the air bubbles passing through the second air hole 72 are dispersed.

[0057] In addition, when the first scraper 8212 wears down, the elastic action of the first spring 82132 causes the first spring 82132 to push the first scraper 8212 upward and seal it against the top inside the auxiliary cover 7, ensuring that the air bubbles entering the first air hole 71 are cut off. When the second scraper 8222 wears down, the elastic action of the second spring 82232 causes the second spring 82232 to push the second scraper 8222 away from the axis of the auxiliary cover 7 and seal it against the inner peripheral wall of the auxiliary cover 7, ensuring that the air bubbles entering the second air hole 72 are cut off.

[0058] Moreover, by rotating the auxiliary component 82, the dissolved liquid and bubbles inside the auxiliary cover 7 can be stirred, which facilitates the reaction between the phenol tail gas and the dissolved liquid and improves the secondary treatment effect of the phenol tail gas.

[0059] The processing box 1 includes a box body 11 and a box cover 12. The box cover 12 is placed on the top of the box body 11. The air inlet pipe 2, the liquid inlet pipe and the exhaust pipe 6 are all arranged on the box cover 12. The liquid outlet pipe and the overflow pipe 5 are all arranged on the box body 11.

[0060] In summary, by conveying the primary treated phenol tail gas into the dissolving liquid, the phenol tail gas reacts with the dissolving liquid, achieving secondary treatment of the phenol tail gas. This ensures complete absorption of phenol and prevents the phenol tail gas from entering the tail gas recovery pipeline, thus avoiding safety hazards. In addition, the auxiliary cover 7, equipped with a first vent 71 and a second vent 72, disperses the bubbles formed by the phenol tail gas, increasing the contact area between the phenol tail gas and dissolved oxygen, thereby improving the secondary treatment effect of the phenol tail gas. Furthermore, the first scraper 8212 and the second scraper 8222 cut off the bubbles passing through the first vent 71 and the second vent 72, ensuring the bubble dispersion effect. Moreover, the rotation of the auxiliary component 82 within the auxiliary cover 7 stirs the dissolving liquid and bubbles within the auxiliary cover 7, facilitating the reaction between the phenol tail gas and the dissolving liquid and improving the secondary treatment effect of the phenol tail gas.

[0061] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. An apparatus for re-treatment of phenol waste gas from storage tanks, comprising a treatment tank (1), wherein the treatment tank (1) is provided with an inlet pipe (2) and an exhaust pipe (6), characterized in that: The processing box (1) is provided with a dissolving liquid and an auxiliary cover (7). The auxiliary cover (7) is fixedly installed in the processing box (1). The air inlet pipe (2) is inserted into the auxiliary cover (7). The auxiliary cover (7) is immersed in the dissolving liquid. The exhaust pipe (6) is located above the dissolving liquid. The top of the auxiliary cover (7) is provided with a first air hole (71).

2. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 1, characterized in that: The auxiliary cover (7) has a second air hole (72) on its side wall.

3. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 2, characterized in that: The processing box (1) is provided with an auxiliary mechanism (8), which is used to cut off the bubbles passing through the first air hole (71) and the second air hole (72); the auxiliary mechanism (8) includes a driving component (81) and an auxiliary component (82), the auxiliary cover (7) is cylindrical in shape, the auxiliary cover (7) is vertically arranged, and multiple first air holes (71) and second air holes (72) are provided. The driving component (81) is used to drive the auxiliary component (82) to rotate around the axis of the auxiliary cover (7); The auxiliary component (82) includes a first auxiliary unit (821) and a second auxiliary unit (822), wherein the first auxiliary unit (821) is used to cut off the bubble passing through the first vent (71), and the second auxiliary unit (822) is used to cut off the bubble passing through the second vent (72); The first auxiliary unit (821) includes a first rotating plate (8211) and a first scraper (8212). The first scraper (8212) is sealed and fitted to the top inside the auxiliary cover (7). The first rotating plate (8211) is connected to the drive assembly (81). The first scraper (8212) is connected to the first rotating plate (8211) through a first elastic element (8213). The first elastic element (8213) exerts an upward thrust on the first scraper (8212). The second auxiliary unit (822) includes a second rotating plate (8221) and a second scraper (8222). The second scraper (8222) is sealed and fitted to the inner peripheral wall of the auxiliary box. The second rotating plate (8221) is connected to the drive assembly (81). The second scraper (8222) is connected to the second rotating plate (8221) through a second elastic element (8223). The second elastic element (8223) exerts a thrust on the second scraper (8222) in a direction away from the axis of the auxiliary cover (7).

4. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 3, characterized in that: The first elastic element (8213) includes a first guide rod (82131) and a first spring (82132). The first guide rod (82131) passes vertically through the first rotating plate (8211). The top end of the first guide rod (82131) is fixedly mounted on the first scraper (8212). The first spring (82132) is located between the first rotating plate (8211) and the first scraper (8212). The two ends of the first spring (82132) are respectively connected to the first rotating plate (8211) and the first scraper (8212). The first spring (82132) is in a compressed state.

5. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 4, characterized in that: A limiting block (82133) is fixedly provided at the bottom end of the first guide rod (82131), and a gap is provided between the limiting block (82133) and the first rotating plate (8211).

6. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 3, characterized in that: The second elastic element (8223) includes a second guide rod (82231) and a second spring (82232). The second guide rod (82231) passes horizontally through the second rotating plate (8221). One end of the second guide rod (82231) is fixedly mounted on the second scraper (8222), and the other end of the second guide rod (82231) is fixedly mounted on a connecting plate (82233). The second spring (82232) is located between the connecting plate (82233) and the second rotating plate (8221). Both ends of the second spring (82232) are connected to the connecting plate (82233) and the second rotating plate (8221) respectively. The second spring (82232) is in a stretched state.

7. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 3, characterized in that: Two of each of the first elastic element (8213) and the second elastic element (8223) are provided, with the two first elastic elements (8213) distributed horizontally and the two second elastic elements (8223) distributed vertically.

8. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 3, characterized in that: The drive assembly (81) includes a drive shaft (811), which is coaxially arranged with the auxiliary cover (7), and the drive shaft (811) is driven by a drive source (812).

9. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 1, characterized in that: The processing box (1) includes a box body (11) and a box cover (12), with the box cover (12) covering the top of the box body (11).

10. The apparatus for re-treatment of phenol waste gas from storage tanks according to claim 1, characterized in that: The solution is an aqueous solution of sodium hydroxide.

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