Device for removing sulfur dioxide from refined acid

Abstract

A device for removing sulfur dioxide from refined acid relates to the technical field of sulfur dioxide removal and comprises a fan, a filter, a heater and a degassing tower which are sequentially connected in series through a gas inlet pipeline, the top of the degassing tower is connected with a gas outlet pipeline, a spray head, a filler layer and a gas blowing mechanism are sequentially arranged in the degassing tower from top to bottom, and the bottom of the degassing tower is connected with an acid outlet pipeline. The air inlet pipeline is communicated with the air blowing mechanism, and the spraying head is connected with an acid inlet pipeline. According to the utility model, the air heater is additionally arranged to heat the air, so that the air stripping efficiency is improved, and the indexes of reduzates in finished acid are ensured to be qualified and accord with the product quality requirements; the air blowing mechanism is novel and reasonable in structural design, the air blowing uniformity is effectively improved, and the air stripping quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfur dioxide removal, in particular to a device for removing sulfur dioxide with refined acid. Background Art

[0002] Refined sulfuric acid is an important raw material in the chemical industry. Due to the production process, the sulfur dioxide in the refined sulfuric acid product often exceeds the standard. The existing refined sulfuric acid removal equipment uses air to remove the sulfur dioxide contained in sulfuric acid. The air blower provides power. The outdoor air is filtered through the filter and enters the degassing tower to blow away the sulfur dioxide gas in the sulfuric acid so that the reductant index in the finished acid is qualified. Due to the instability of the outdoor temperature, when the air temperature is low, the stripping efficiency is reduced, resulting in unqualified reductant index in the finished acid. Therefore, it is necessary to make further improvements to the existing removal equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a device for removing sulfur dioxide by refining acid to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A refined acid sulfur dioxide removal device, characterized in that it comprises a fan, a filter, a heater and a degassing tower which are sequentially connected in series through an air inlet pipe, the top of the degassing tower is connected to an air outlet pipe, and a spray head, a packing layer and an air blowing mechanism are sequentially arranged inside the degassing tower from top to bottom, the bottom of the degassing tower is connected to an acid outlet pipe, the air inlet pipe is communicated with the air blowing mechanism, and the spray head is connected to an acid inlet pipe.

[0006] Preferably, the heater is connected to a temperature controller and a temperature sensor, and the temperature sensor is electrically connected to the temperature controller.

[0007] Preferably, the air inlet of the fan is connected to a converging duct, and the converging duct is respectively connected to a normal temperature air inlet duct and a waste heat air inlet duct through a tee.

[0008] Preferably, both the normal temperature air intake duct and the waste heat air intake duct are provided with control valves.

[0009] Preferably, the blowing mechanism is arranged at an angle, and the angle between it and the horizontal plane is 1-10°.

[0010] Preferably, the height of the blowing mechanism at one side away from the air inlet pipe is smaller than the height at the other side.

[0011] Preferably, the blowing mechanism is an inverted frustum structure, which includes a first annular tube and a second annular tube coaxially arranged, the first annular tube is connected to the air intake duct, and a branch pipe is connected between the first annular tube and the second annular tube, and at least two blowing holes are evenly distributed at the top of the first annular tube and the second annular tube.

[0012] Preferably, the second annular tube is arranged in parallel with the first annular tube, and the second annular tube is located below the first annular tube, and an acid discharge hole is provided at the bottom of the lower side of the second annular tube.

[0013] Preferably, each of the blowing holes is a trumpet-shaped structure.

[0014] Preferably, an air flow meter is provided between the fan and the filter.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The utility model heats the air by adding an air heater to improve the stripping efficiency and ensure that the reducing substance index in the finished acid is qualified and meets the product quality requirements;

[0017] (2) The utility model has a waste heat air intake duct connected to the air inlet end of the fan, which can make full use of the heat generated by other production systems, realize waste heat utilization, reduce energy waste, and reduce production costs;

[0018] (3) The utility model can monitor the air temperature in real time and control the opening and closing of the heater according to the actual situation, thereby reducing the workload of on-site personnel and saving energy consumption;

[0019] (4) The blowing mechanism of the utility model has a novel and reasonable structural design, which effectively improves the uniformity of blowing and improves the quality of blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the degassing tower of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the blowing mechanism of the utility model;

[0024] Figure 4 This is a schematic cross-sectional view of the blowing mechanism of the utility model;

[0025] Figure 5This is a schematic diagram of the structure of the blowing mechanism of the utility model from a top view;

[0026] In the figure: 1, air inlet pipe, 2, fan, 3, filter, 4, heater, 5, degassing tower, 6, air outlet pipe, 7, spray head, 8, packing layer, 9, blowing mechanism, 901, first ring pipe, 902, second ring pipe, 903, branch pipe, 904, blowing hole, 905, acid discharge hole, 10, acid outlet pipe, 11, acid inlet pipe, 12, temperature controller, 13, temperature sensor, 14, confluence pipe, 15, tee, 16, normal temperature air inlet pipe, 17, waste heat air inlet pipe, 18, control valve, 19, air flow meter. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] like Figure 1 As shown, a device for removing sulfur dioxide from refined acid comprises a fan 2, a filter 3, a heater 4 and a degassing tower 5 which are sequentially connected in series through an air inlet pipe 1. An air flow meter 19 is arranged between the fan and the filter for monitoring the amount of air entering. The heater is an electric heater, on which a temperature controller 12 and a temperature sensor 13 are connected, and the temperature sensor is electrically connected to the temperature controller (this is the prior art and will not be described in detail here). An air outlet pipe 6 is connected to the top of the degassing tower, and a spray head 7, a packing layer 8 and an air blowing mechanism 9 are sequentially arranged inside the degassing tower from top to bottom. An acid outlet pipe 10 is connected to the bottom of the degassing tower, the air inlet pipe is connected to the air blowing mechanism, and an acid inlet pipe 11 is connected to the spray head. The fan first transports external air to the filter to remove internal impurities, and then uses the heater to heat the air to increase the air temperature, and finally transports the air to the degassing tower to carry out sulfur dioxide stripping treatment on the refined acid.

[0029] In order to improve energy utilization, the air inlet of the fan is connected to a confluence pipe 14, which is respectively connected to a normal temperature air intake pipe 16 and a waste heat air intake pipe 17 through a tee 15, and can be connected with hot air generated by other production systems or equipment to realize waste heat utilization, reduce energy waste, and reduce production costs. Control valves 18 are provided on the normal temperature air intake pipe and the waste heat air intake pipe, and the air source can be freely adjusted according to actual conditions. The temperature sensor monitors the temperature of the air in real time. When the real-time temperature fails to reach the preset temperature, the temperature controller starts the heater to heat the air; otherwise, the heater stops working to save energy loss.

[0030] like Figures 2 to 5As shown, the blowing mechanism in the degassing tower 5 is an inverted frustum structure, which includes a first annular tube 901 and a second annular tube 902 which are coaxially arranged, that is, the first annular tube and the second annular tube are located on the same central axis, the second annular tube is arranged in parallel with the first annular tube, and the second annular tube is located below the first annular tube, and at least two blowing holes 904 are evenly distributed on the top of the first annular tube and the second annular tube, each blowing hole is a trumpet-shaped structure with a larger upper part and a smaller lower part, which effectively increases the blowing points and blowing direction and improves the uniformity of the blowing, the first annular tube is connected to the air inlet pipe, and a branch pipe 903 is connected between it and the second annular tube, and the first annular tube and the second annular tube are connected by the branch pipe.

[0031] In order to prevent the acid from falling into the blowing mechanism through the blowing holes, the blowing mechanism in the degassing tower 5 is tilted, and the angle between it and the horizontal plane is 1~10°, preferably 5° in this embodiment. The height of the blowing mechanism away from one side of the air inlet pipe is less than the height on the other side to prevent the acid from flowing back into the air inlet pipe. An acid discharge hole 905 is provided at the bottom of the lower side of the second ring pipe to facilitate the timely discharge of the acid.

[0032] Specific working principle:

[0033] like Figures 1 to 5 As shown, the fan 2 transports air (normal temperature air or a mixed gas with waste heat air), which enters the heater 4 after being filtered by the filter 3. The temperature sensor 13 monitors the air temperature in real time. When the temperature is lower than the preset temperature, the temperature controller 12 starts the heater 4 to heat the air, and the heated air is blown out through the blowing mechanism; and the sulfuric acid is sprayed out from the spray head 7 through the acid inlet pipe 11, sprayed on the packing layer 8, and in reverse contact with the air blown out from the blowing mechanism at the bottom of the degassing tower 5, so as to blow away the sulfur dioxide gas remaining in the sulfuric acid, and the sulfur dioxide gas is discharged from the outlet pipe 6 at the top of the degassing tower 5 along with the air, and the sulfuric acid after being blown out is discharged through the acid outlet pipe 10 at the bottom of the degassing tower 5.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for removing sulfur dioxide from refined acid, characterized in that: The invention comprises a fan, a filter, a heater and a degassing tower which are connected in series in sequence through an air inlet pipe. The top of the degassing tower is connected with an air outlet pipe, and a spray head, a packing layer and an air blowing mechanism are arranged in sequence from top to bottom inside the degassing tower. The bottom of the degassing tower is connected with an acid outlet pipe, the air inlet pipe is communicated with the air blowing mechanism, and the spray head is connected with an acid inlet pipe.

2. A refined acid sulfur dioxide removal device according to claim 1, characterized in that: The heater is connected with a temperature controller and a temperature sensor, and the temperature sensor is electrically connected to the temperature controller.

3. A refined acid sulfur dioxide removal device according to claim 1, characterized in that: The air inlet of the fan is connected with a converging pipe, and the converging pipe is respectively connected with a normal temperature air inlet pipe and a waste heat air inlet pipe through a tee.

4. A device for removing sulfur dioxide by using refined acid according to claim 3, characterized in that: The normal temperature air intake pipeline and the waste heat air intake pipeline are both provided with control valves.

5. The device for removing sulfur dioxide by using refined acid according to claim 1, characterized in that: The blowing mechanism is tilted, and the angle between it and the horizontal plane is 1-10°.

6. A device for removing sulfur dioxide by using refined acid according to claim 5, characterized in that: The height of the blowing mechanism on one side away from the air inlet pipe is smaller than the height on the other side.

7. A device for removing sulfur dioxide with refined acid according to claim 1, 5 or 6, characterized in that: The blowing mechanism is an inverted frustum structure, which includes a first annular tube and a second annular tube arranged coaxially. The first annular tube is connected to the air intake pipe, and a branch pipe is connected between the first annular tube and the second annular tube. The tops of the first annular tube and the second annular tube are evenly spaced with at least two blowing holes.

8. A device for removing sulfur dioxide by using refined acid according to claim 7, characterized in that: The second annular tube is arranged in parallel with the first annular tube, and the second annular tube is located below the first annular tube. An acid discharge hole is arranged at the bottom of a lower side of the second annular tube.

9. The device for removing sulfur dioxide by using refined acid according to claim 7, characterized in that: Each of the blowing holes is a trumpet-shaped structure.

10. The device for removing sulfur dioxide by using refined acid according to claim 1, characterized in that: An air flow meter is arranged between the fan and the filter.

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