Acid mist absorption device for unloading hydrochloric acid high-level storage tank

Abstract

The utility model discloses an acid mist absorption device for an unloading hydrochloric acid high-level storage tank, which comprises an exhaust pipe A (1), a water inlet pipe (2), an exhaust pipe B (4), an overflow pipe (5), an exhaust pipe C (6), a neutralization water tank (7), a water drainage pipe (8) and an acid mist collection tank (10). The middle part of the acid mist collecting tank (10) is respectively connected with the exhaust pipe A (1) and the overflow pipe (5), the upper end of the acid mist collecting tank (10) is inserted into the water inlet pipe (2), the top end of the acid mist collecting tank (10) is respectively connected with the exhaust pipe B (4) and the exhaust pipe C (6), the lower end of the acid mist collecting tank (10) is connected with the drainage pipe (8), and the exhaust pipe B (4), the overflow pipe (5), the exhaust pipe C (6) and the drainage pipe (8) are respectively connected with the neutralization water tank (7). The acid mist adsorption device is good in acid mist adsorption effect, and acid mist cannot overflow.

Description

Technical Field

[0001] The utility model belongs to the technical field of acid mist absorption, and in particular relates to an acid mist absorption device for a high-position storage tank for unloading hydrochloric acid. Background Art

[0002] During the hydrochloric acid unloading process, as the liquid level in the hydrochloric acid high-level storage tank continues to rise, the pressure in the tank increases, and the airflow carries the acid mist into the acid mist collection device. Inside the acid mist collection device, the acid mist undergoes a neutralization reaction with the alkali solution: NaOH + HCl = NaCl + H2O. After the acid unloading operation is completed, the acid mist stops entering the alkali solution storage tank. At this time, the drain pipe of the acid mist collection device is opened on site to drain the reacted solution into the neutralization water tank. Existing acid mist collection devices are mainly made of carbon steel lined with plastic. The top of the storage tank is sealed with a flange cover. Before each acid unloading operation, the flange cover needs to be removed, and then the prepared alkali solution is poured into the storage tank. Finally, the flange cover is bolted shut. In practice, the acid mist adsorption effect is poor, and acid mist often overflows from the vent pipe, corroding surrounding equipment. In addition, during the acid unloading process, the unabsorbed acid mist severely corrodes the carbon steel, resulting in a short life of the acid mist absorber. Summary of the Invention

[0003] The purpose of the utility model is to overcome the above disadvantages and provide an acid mist absorption device for a high-level storage tank for unloading hydrochloric acid, which has good acid mist adsorption effect and will not cause acid mist overflow.

[0004] The purpose of the utility model and the solution of its main technical problems are achieved by adopting the following technical solutions:

[0005] The utility model discloses an acid mist absorption device for a high-position storage tank for unloading hydrochloric acid, comprising an exhaust pipe A, a water inlet pipe, an exhaust pipe B, an overflow pipe, an exhaust pipe C, a neutralization pool, a drain pipe, and an acid mist collecting tank. The utility model is characterized in that the middle portion of the acid mist collecting tank is respectively connected to the exhaust pipe A and the overflow pipe, the upper end of the acid mist collecting tank is inserted into the water inlet pipe, the top end of the acid mist collecting tank is respectively connected to the exhaust pipe B and the exhaust pipe C, the lower end of the acid mist collecting tank is connected to the drain pipe, and the exhaust pipe B, the overflow pipe, the exhaust pipe C, and the drain pipe are respectively connected to the neutralization pool.

[0006] The water inlet pipe is inserted into the lower end of the acid mist collection tank, a valve A is installed at the upper end of the water inlet pipe, and a plurality of nozzles are provided at the lower end of the water inlet pipe.

[0007] A valve B is installed on the drain pipe.

[0008] Compared with the prior art, the present invention has significant advantages. As can be seen from the above technical solution, exhaust pipe A and an overflow pipe are connected to the middle of the acid mist collection tank, an inlet pipe is inserted into the upper end of the acid mist collection tank, exhaust pipes B and C are connected to the top of the acid mist collection tank, and a drain pipe is connected to the lower end of the acid mist collection tank. Exhaust pipes B and C are installed at the top of the hydrochloric acid storage tank. Exhaust pipe A enters the middle of the acid mist collection tank and leads to the inlet pipe at the middle and upper part opposite it, controlled by valve A. The inlet pipe inside the acid mist collection tank is provided with numerous small holes. The inlet pipe is configured to spray the acid mist inside the acid mist collection tank. Two vertical holes are drilled in the top of the acid mist collection tank to connect exhaust pipes B and C and lead to the neutralization water tank. A drain pipe is connected to the bottom of the acid mist collection tank and leads to the underground neutralization water tank. When unloading hydrochloric acid, valve A on the inlet pipe is opened to allow water to enter the acid mist collection tank. When water flows from the bottom of the acid mist collection tank to the underground neutralization pool, the liquid level gradually rises until it covers the lower end of the exhaust pipe B of the acid mist collection tank. At the same time, the water is in a spraying state until the overflow pipe steadily flows out the absorbed acid mist water. To prevent overpressure, a second exhaust pipe C is set. By setting up a water inlet pipe and a spray head, the acid mist generated during the acid unloading process is effectively absorbed, and the generation of unabsorbed acid mist is avoided. In addition, the acid mist collection tank is designed without valves, and it is usually kept dry. There is no acid mist when hydrochloric acid is not unloaded. When unloading, the water pressure and water volume of the water inlet pipe are maintained at a certain level, which effectively solves the problem of acid mist generated during unloading and reduces the corrosion damage of acid mist to equipment. The acid mist adsorption effect is good and there is no acid mist overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the utility model;

[0010] Figure 2 It is a structural diagram of the lower end of the water inlet pipe of the utility model;

[0011] Figure 3 This is a usage state diagram of the utility model.

[0012] Marking in the figure

[0013] 1. Exhaust pipe A; 2. Water inlet pipe; 3. Valve A; 4. Exhaust pipe B; 5. Overflow pipe; 6. Exhaust pipe C; 7. Neutralization tank; 8. Drain pipe; 9. Valve B; 10. Acid mist collection tank; 11. Cart; 12. Acid unloading pump; 13. Hydrochloric acid high-level storage tank. DETAILED DESCRIPTION

[0014] The following is a detailed description of the specific implementation, structure, features and effects of the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0015] The invention discloses an acid mist absorption device for a high-position storage tank for unloading hydrochloric acid, comprising an exhaust pipe A1, a water inlet pipe 2, a valve A3, an exhaust pipe B4, an overflow pipe 5, an exhaust pipe C6, a neutralization pool 7, a drain pipe 8, a valve B9, and an acid mist collecting tank 10. The invention is characterized in that the middle portion of the acid mist collecting tank 10 is respectively connected to the exhaust pipe A1 and the overflow pipe 5, the upper end of the acid mist collecting tank 10 is inserted into the water inlet pipe 2, the top end of the acid mist collecting tank 10 is respectively connected to the exhaust pipe B4 and the exhaust pipe C6, the lower end of the acid mist collecting tank 10 is connected to the drain pipe 8, the exhaust pipe B4, the overflow pipe 5, the exhaust pipe C6, and the drain pipe 8 are respectively connected to the neutralization pool 7, the water inlet pipe 2 is inserted into the lower end of the acid mist collecting tank 10, the upper end of the water inlet pipe 2 is provided with a valve A3, the lower end of the water inlet pipe 2 is provided with a plurality of nozzles, and the drain pipe 8 is provided with a valve B9.

[0016] During use, first open the valve A3 of water inlet pipe 2 and fill water in acid mist collecting tank 10. Treat that acid mist collecting tank 10 bottoms drip water to underground neutralization pool 7, liquid level rises gradually until do not have the vent pipe B4 lower end of acid mist collecting tank 10. Restart acid unloading pump 12, acid unloading pump 12 pumps out hydrochloric acid from the tank on the car, hydrochloric acid enters hydrochloric acid high-level storage tank 13, the acid mist in the hydrochloric acid high-level storage tank 13 enters acid mist collecting tank 10 by vent pipe A1, the water of water inlet pipe 2 is in the spray state spraying acid mist, until the stable acid mist water of outflow absorption of overflow pipe 5, prevents that second vent pipe C6 is set.The acid mist that produces in the acid unloading process is effectively absorbed, and avoided that unabsorbed acid mist produces simultaneously.In addition, acid mist collecting tank 10 inside does not have valve design, usually keeps anhydrous state, and hydrochloric acid does not have acid mist when unloading. During unloading, maintaining a constant water pressure and volume in the water inlet pipe 2 effectively solves the acid mist problem during unloading and reduces the corrosive effects of the acid mist on equipment. Two vertical holes are drilled in the top of the acid mist collection tank 10, connecting exhaust pipes B4 and C6 to the neutralization tank 7. The bottom of the acid mist collection tank 10 is connected to a drain pipe 8, which is then led into the underground neutralization tank 7.

[0017] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An acid mist absorption device for a high-level storage tank for unloading hydrochloric acid, comprising an exhaust pipe A (1), a water inlet pipe (2), an exhaust pipe B (4), an overflow pipe (5), an exhaust pipe C (6), a neutralization pool (7), a drain pipe (8), and an acid mist collection tank (10), characterized in that; The middle of the acid mist collecting tank (10) is connected to the exhaust pipe A (1) and the overflow pipe (5), the upper end of the acid mist collecting tank (10) is inserted into the water inlet pipe (2), the top of the acid mist collecting tank (10) is connected to the exhaust pipe B (4) and the exhaust pipe C (6), the lower end of the acid mist collecting tank (10) is connected to the drain pipe (8), and the exhaust pipe B (4), the overflow pipe (5), the exhaust pipe C (6), and the drain pipe (8) are connected to the neutralization tank (7).

2. The acid mist absorption device for a high-level storage tank for unloading hydrochloric acid according to claim 1, characterized in that: The water inlet pipe (2) is inserted into the lower end of the acid mist collection tank (10), a valve A (3) is installed at the upper end of the water inlet pipe (2), and a plurality of nozzles are provided at the lower end of the water inlet pipe (2).

3. The acid mist absorption device for a high-level storage tank for unloading hydrochloric acid according to claim 1, characterized in that: A valve B (9) is installed on the drain pipe (8).

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