Acid distribution device for sulfuric acid dry absorption tower

Abstract

The utility model discloses an acid distribution device for a sulfuric acid dry absorption tower, which comprises a sulfuric acid box, an absorption tank and a protective cover, the sulfuric acid box is communicated with the absorption tank through an overflow port, the top of the sulfuric acid box is provided with a liquid inlet, the protective cover covers the outer side of the absorption tank, and the bottom of the absorption tank is movably connected with the protective cover. And the absorption tank is powered by an external driving shaft to realize rotation. The utility model relates to the technical field of industrial sulfuric acid production, in particular to an acid distribution device for a sulfuric acid dry absorption tower, which can blow liquid concentrated sulfuric acid into an atomized water drop form by arranging an atomizing blowing mechanism at an overflow port, and uniformly lay the concentrated sulfuric acid on the inner wall of an absorption tank in the form of atomized water drops, so that on one hand, the laying thickness is more uniform, and the production efficiency is improved. On the other hand, the concentrated sulfuric acid can be in more sufficient contact with sulfur trioxide; and secondly, the air exhaust mechanism is arranged in the space between the absorption tank and the protective cover, so that escaping harmful components such as concentrated sulfuric acid or sulfur trioxide can be absorbed, and environmental pollution is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial sulfuric acid production technical field, concretely is a kind of acid distribution device for sulfuric acid dry absorption tower. BACKGROUND

[0002] The production method of industrial sulfuric acid mainly includes tower method, pincer chamber method and contact method, wherein, the application of contact method is most universal.Sulfuric acid process of contact method mainly has four steps: generating furnace gas by boiling furnace, purifying and drying furnace gas, catalytically oxidizing sulfur dioxide into sulfur trioxide in contact furnace, and finally absorbing sulfur trioxide in absorption tower using 98.3% concentrated sulfuric acid.Sulfur trioxide is absorbed by concentrated sulfuric acid, and then diluted into sulfuric acid of different concentrations according to requirements.It can be seen that absorption tower is an important device of industrial sulfuric acid production process.

[0003] A kind of acid distribution device for sulfuric acid dry absorption tower is disclosed in Chinese authorized patent number CN 219043220 U, which is provided with a protective cover outside the absorption tank, the protective cover is fixedly connected with the sulfuric acid tank, and the protective cover supports the absorption tank, replacing the rotating structure between the absorption tank and the sulfuric acid tank, so as to avoid damage to the connection between the absorption tank and the sulfuric acid tank.

[0004] The inventor believes that the main problem of the above device is that the contact efficiency between concentrated sulfuric acid and sulfur trioxide is low.Firstly, concentrated sulfuric acid flows into the inner wall of the absorption tank in liquid form from the overflow port, and since the flow rate of concentrated sulfuric acid cannot be controlled, the thickness of sulfuric acid laid on the inner wall of the absorption tank cannot be controlled, so it is difficult to control the effective contact degree of sulfuric acid film and sulfur trioxide gas.Secondly, since the absorption tank and the sulfuric acid tank are connected movably, there is inevitably a gap between them, and whether it is concentrated sulfuric acid or sulfur trioxide gas, the volatilized sulfuric acid or sulfur trioxide will eventually diffuse from the gap between the protective cover and the absorption tank to the environment, polluting the environment. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides an acid distribution device for sulfuric acid dry absorption tower, which solves the problems of low efficiency and environmental pollution of existing sulfuric acid dry absorption tower.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an acid distribution device for sulfuric acid dry absorption tower, comprising a sulfuric acid tank, an absorption tank and a protective cover, wherein the sulfuric acid tank and the absorption tank are connected through an overflow port, the top of the sulfuric acid tank is provided with a liquid inlet, the protective cover is arranged outside the absorption tank, and the bottom of the absorption tank is movably connected with the protective cover, and the absorption tank is driven by an external drive shaft to rotate.

[0009] The bottom of the sulfuric acid tank is provided with a flow guide cover inside the absorption tank, the flow guide cover is located directly below the overflow port, the outer side of the sulfuric acid tank is provided with a high-pressure air pump, the high-pressure air pump is communicated with an atomizing nozzle at the bottom of the sulfuric acid tank, and the air jet direction of the atomizing nozzle is directly opposite to the flow guide cover.

[0010] A hollow rotating shaft, the upper half of the rotating shaft is located in the sulfuric acid tank and is provided with a stirring shaft, the lower half of the rotating shaft is located in the absorption tank and is provided with a plurality of air inlet branch pipes, and the top of the rotating shaft extends to the top of the sulfuric acid tank and is communicated with an external rotary joint.

[0011] A driving motor is arranged at the output end of the driving motor, and a driving gear is arranged at the output end of the driving motor.

[0012] The bottom of the absorption tank is provided with a liquid outlet.

[0013] A seat body is arranged on the absorption tank, and a sliding groove is arranged on the seat body.

[0014] As a further preferred, the inner cavity of the sulfuric acid tank is provided with a heating tank, the heating tank is provided with a heating cavity, and the heating cavity is respectively provided with a hot water inlet and a cold water outlet.

[0015] As a further preferred, the bottom of the sulfuric acid tank is provided with a partition plate, and the partition plate is located between the flow guide cover and the atomizing nozzle.

[0016] As a further preferred, the outer side of the protective cover is provided with an air extraction pump, and an air extraction pipe is arranged in the space between the protective cover and the absorption tank, and the air extraction pipe is communicated with the air extraction pump.

[0017] As a further preferred, a plurality of annular ring covers are arranged on the inner wall of the absorption tank, the ring cover is provided with a hole groove, and the ring cover is located obliquely below the air inlet branch pipe.

[0018] (Three) beneficial effects

[0019] The utility model provides a sulfuric acid device for sulfuric acid dry absorption tower. It has the following beneficial effects:

[0020] The sulfuric acid device for sulfuric acid dry absorption tower, by setting atomizing air blowing mechanism at overflow port, can blow liquid concentrated sulfuric acid into the form of atomized water drop, and the concentrated sulfuric acid is evenly laid in the inner wall of the absorption tank in the form of atomized water drop, which can make the laying thickness more uniform, and can make the concentrated sulfuric acid contact with sulfur trioxide more fully. Secondly, by setting the air extraction mechanism in the space between the absorption tank and the protective cover, the escaped harmful components such as concentrated sulfuric acid and sulfur trioxide can be absorbed, and the environment is avoided from being polluted. DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model.

[0022] In the figure: 1, sulfuric acid tank; 2, absorption tank; 3, protective cover; 4, drive shaft; 5, seat; 6, liquid inlet; 7, overflow; 8, fairing; 9, high-pressure air pump; 10, atomizing nozzle; 11, rotating shaft; 12, drive motor; 13, drive gear; 14, gear ring; 15, stirring shaft; 16, air inlet branch pipe; 17, liquid outlet; 18, chute; 19, slide rail; 20, heating box; 21, heating cavity; 22, hot water inlet; 23, cold water outlet; 24, partition; 25, air pump; 26, air pipe; 27, ring cover; 28, hole groove; 29, rotary joint. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] As Figure 1 shown, the utility model provides a kind of technical scheme: a kind of acid distribution device for sulfuric acid dry absorption tower, including sulfuric acid tank 1, absorption tank 2 and protective cover 3, wherein, sulfuric acid tank 1 is communicated with absorption tank 2 by overflow 7, the top of sulfuric acid tank 1 is provided with liquid inlet 6, protective cover 3 is covered in the outside of absorption tank 2, and the bottom of absorption tank 2 is movably connected with protective cover 3, absorption tank 2 is rotated by the power provided by external drive shaft 4, drive shaft 4 drives absorption tank 2 to rotate, so that sulfuric acid evenly spreads the inner wall of absorption tank 2.

[0025] The bottom of sulfuric acid tank 1 is provided with fairing 8 located in the inside of absorption tank 2, fairing 8 is located directly below overflow 7, the outside of sulfuric acid tank 1 is provided with high-pressure air pump 9, the high-pressure air pump 9 is communicated with atomizing nozzle 10 located at the bottom of sulfuric acid tank 1, and the air jet direction of atomizing nozzle 10 is directly opposite fairing 8.

[0026] The inner wall of absorption tank 2 is provided with multiple groups of annular ring cover 27, hole groove 28 is formed in ring cover 27, and ring cover 27 is located obliquely below air inlet branch pipe 16, and ring cover 27 can improve the contact area of sulfuric acid and sulfur trioxide, and sulfuric acid can continue to flow down along hole groove 28 thereon.

[0027] The bottom of sulfuric acid tank 1 is provided with partition 24, and partition 24 is located between fairing 8 and atomizing nozzle 10, and the purpose of setting partition 24 is to block misty water droplets from flowing upward.

[0028] A hollow rotating shaft 11, the upper half of which is located in the sulfuric acid tank 1 and is provided with a stirring shaft 15, the lower half of which is located in the absorption tank 2 and is provided with a plurality of gas inlet branches 16, and the top of which extends to the top of the sulfuric acid tank 1 and is in communication with an external rotary joint 29.

[0029] A drive motor 12 is provided with a drive gear 13 at its output end, which is engaged with a gear ring 14 on the rotating shaft 11.

[0030] The inner cavity of the sulfuric acid tank 1 is provided with a heating tank 20, and the heating tank 20 is provided with a heating cavity 21, and the heating cavity 21 is respectively provided with a hot water inlet 22 and a cold water outlet 23 (both located outside the sulfuric acid tank 1), in order to improve the activity of sulfuric acid, hot water is injected through the hot water inlet 22, the hot water enters the heating cavity 21, and the sulfuric acid in the sulfuric acid tank 1 is heated, and the water after losing heat is discharged through the cold water outlet 23.

[0031] The bottom of the absorption tank 2 is provided with a liquid outlet 17.

[0032] The outer side of the protective cover 3 is provided with an air suction pump 25, and the space between the protective cover 3 and the absorption tank 2 is provided with an air suction pipe 26, which is in communication with the air suction pump 25.

[0033] The seat body 5 is provided with a sliding groove 18, and the bottom of the absorption tank 2 is provided with a sliding rail 19, which is slidably arranged in the sliding groove 18, and the absorption tank 2 can rotate along the sliding rail 19.

[0034] Meanwhile, the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0035] In use, concentrated sulfuric acid enters the sulfuric acid tank 1 from the liquid inlet 6, then the drive motor 12 is started, thereby driving the drive gear 13 to rotate, in turn driving the stirring shaft 15 on the rotating shaft 11 to rotate, thereby stirring the concentrated sulfuric acid, then the concentrated sulfuric acid flows down from the overflow port 7 to the flow guide cover 8, the high-pressure gas pump 9 is started, and the high-pressure gas stream is output through the atomizing nozzle 10, thereby blowing the liquid sulfuric acid on the flow guide cover 8 into a mist droplet shape and flowing onto the inner wall of the absorption tank 2 to form a uniform laying thickness.

[0036] Sulfur trioxide gas is introduced through the inlet of the rotary joint 29 and transmitted through the rotating shaft 11, and finally sprayed from each gas inlet branch 16, then contacted with the sulfuric acid on the inner wall of the absorption tank 2, and as the sulfuric acid continuously flows in, until the inner wall of the absorption tank 2 is fully covered, and after the contact is completed, it is discharged from the liquid outlet 17.

[0037] For the harmful components overflowing during the rotation of the absorption tank 2, the air suction pump 25 is started, and the harmful components are absorbed through the air suction pipe 26 to avoid pollution of the environment.

[0038] In summary, the acid distribution device for the sulfuric acid dry absorption tower, by setting the atomizing blowing mechanism in the overflow port, can blow the liquid concentrated sulfuric acid into the form of atomized water droplets, and the concentrated sulfuric acid is evenly laid in the inner wall of the absorption tank in the form of atomized water droplets, which can make the laying thickness more uniform, and on the other hand, the concentrated sulfuric acid can be more fully contacted with sulfur trioxide; secondly, by setting the air extraction mechanism in the space between the absorption tank and the protective cover, the escaped harmful components such as concentrated sulfuric acid or sulfur trioxide can be absorbed to avoid environmental pollution.

[0039] It should be noted that the electrical components appearing in this paper are all connected with the main control device and 220V or 380V mains electricity, and the main control device can be a conventional known device such as a computer, and its control principle, internal structure and control switch mode are all conventional means of the prior art, which are directly quoted here without further description. In this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0040] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for distributing acid for a sulfuric acid drying tower, characterized in that: The application relates to a sulfuric acid tank device which comprises a sulfuric acid tank (1), an absorption tank (2) and a protective cover (3), wherein the sulfuric acid tank (1) is communicated with the absorption tank (2) through an overflow port (7), the top of the sulfuric acid tank (1) is provided with a liquid inlet (6), the protective cover (3) is arranged outside the absorption tank (2), the bottom of the absorption tank (2) is movably connected with the protective cover (3), and the absorption tank (2) is driven to rotate by an external driving shaft (4). The bottom of the sulfuric acid tank (1) is provided with a flow guide cover (8) arranged inside the absorption tank (2), the flow guide cover (8) is located directly below the overflow port (7), the outer side of the sulfuric acid tank (1) is provided with a high-pressure air pump (9), the high-pressure air pump (9) is communicated with an atomizing nozzle (10) arranged at the bottom of the sulfuric acid tank (1), and the air jet direction of the atomizing nozzle (10) directly faces the flow guide cover (8). A hollow rotating shaft (11) is arranged, the upper half of the rotating shaft (11) is arranged in the sulfuric acid tank (1) and is provided with a stirring shaft (15), the lower half of the rotating shaft (11) is arranged in the absorption tank (2) and is provided with a plurality of air inlet branch pipes (16), and the top of the rotating shaft (11) extends to the top of the sulfuric acid tank (1) and is communicated with an external rotary joint (29). A driving motor (12) is arranged, the output end of the driving motor (12) is provided with a driving gear (13), and the driving gear (13) is meshed with a gear ring (14) arranged on the rotating shaft (11). The bottom of the absorption tank (2) is provided with a liquid outlet (17). A seat body (5) is arranged, the seat body (5) is provided with a sliding groove (18), the bottom of the absorption tank (2) is provided with a sliding rail (19), and the sliding rail (19) is slidably arranged in the sliding groove (18).

2. The acid distribution device for the sulfuric acid drying tower according to claim 1, characterized in that: The inner cavity of the sulfuric acid tank (1) is provided with a heating tank (20), the heating tank (20) is provided with a heating cavity (21), and the heating cavity (21) is respectively provided with a hot water inlet (22) and a cold water outlet (23).

3. The acid distributing device for the sulfuric acid drying tower according to claim 1, characterized in that: The bottom of the sulfuric acid tank (1) is provided with a partition plate (24), and the partition plate (24) is located between the flow guide cover (8) and the atomizing nozzle (10).

4. The acid distributing device for the sulfuric acid drying tower according to claim 1, characterized in that: The outer side of the protective cover (3) is provided with an air extraction pump (25), an air extraction pipe (26) is arranged in the space between the protective cover (3) and the absorption tank (2), and the air extraction pipe (26) is communicated with the air extraction pump (25).

5. The acid distributing device for the sulfuric acid drying tower according to claim 1, characterized in that: A plurality of ring covers (27) are arranged on the inner wall of the absorption tank (2), the ring cover (27) is provided with a hole groove (28), and the ring cover (27) is located obliquely below the air inlet branch pipe (16).

Images