Equipment for preparing acid from smelting flue gas

Abstract

The utility model provides smelting flue gas acid making equipment which comprises a base, the top of the base is fixedly connected with a heating tower, the left side of the top of the heating tower is fixedly connected with a gas inlet pipeline, the left side of the gas inlet pipeline is fixedly connected with a butt joint pipe, and the interior of the butt joint pipe is fixedly connected with a first filter plate. A waste heat recovery assembly is arranged on the right side of the air inlet pipeline, a spraying tower is fixedly connected to the middle side of the top of the base, a suction pump is installed on the top of the spraying tower, a conveying pipe is fixedly connected to the output end of the suction pump, and a rotating frame is rotationally connected to the bottom of the conveying pipe. According to the utility model, the suction pump is used for sucking the desulfurization liquid, so that the fan blades can be driven to rotate, at the moment, the spray head can rotate, the maximum-area contact between the desulfurization liquid and the flue gas can be realized, and the desulfurization efficiency and the acid making efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of acid production, in particular to a smelting flue gas acid production device. Background Art

[0002] Smelting flue gas refers to a gas mixture generated by the reaction of sulfur, carbon and other compounds in the raw materials with oxygen in the air due to high temperature during the metal smelting process. These flue gases usually contain sulfur dioxide (SO2), nitrogen (N2), carbon dioxide (CO2), water vapor (H2O) and other volatile impurity compounds. Sulfuric acid production and desulfurization through flue gas are important environmental protection measures in the smelting industry, aiming to reduce environmental pollution and recover useful chemicals. The purpose of removing SO2 is achieved by reacting SO2 in the flue gas with an absorbent (such as limestone slurry or sodium hydroxide solution) to generate insoluble sulfates or sulfites.

[0003] Chinese patent CNCN218221546U discloses a flue gas acid-making device for acid production, comprising an acid-making device body and a filter tank, wherein an air injection port is arranged on the top of the acid-making device body, an air inlet pipe is arranged on one side of the filter tank, a tank cover is installed on the top of the filter tank, an air outlet is arranged on the top of the tank cover, a C-shaped connecting pipe is installed between the air injection port and the air outlet, a plurality of supporting columns and a dust exhaust pipe are installed on the bottom of the filter tank, a dust collecting box is installed on the end of the dust exhaust pipe, a filter box is installed inside the filter tank, the filter box is a disc mesh structure, and a filter core for filtering and blocking dust is installed inside the filter box, and before the flue gas enters the acid-making device body for acid production, the dust inside the flue gas is first filtered by the filter tank, thereby preventing the dust from adhering to the inside of the acid-making device body, thereby causing the acid liquid to mix with the dust and affecting the quality of the acid liquid.

[0004] Although the above patent mentioned in the specification that "before the flue gas enters the acid-making equipment body to make acid, the dust inside the flue gas is first filtered through the filter tank to prevent the dust from adhering to the inside of the acid-making equipment body, thereby causing the acid liquid and the dust to mix and affect the quality of the acid liquid; first, the flue gas is discharged from the air inlet pipe into the filter tank, and due to the principle of upward movement of gas, the flue gas will pass through the filter box, and the filter element in the filter box will separate the flue gas and the dust. The flue gas passes through the filter element and enters the inside of the acid-making equipment body through the C-type connecting pipe for acid production, while the dust is blocked by the filter element, and some of the dust will fall to the bottom of the filter tank and enter the dust collecting box through the dust exhaust pipe. Finally, the dust collecting box is opened to clean the dust, which is simple and convenient", but it is impossible to achieve the maximum area of ​​contact between the desulfurization liquid and the flue gas during the flue gas desulfurization process, resulting in low desulfurization efficiency. Therefore, in view of the above shortcomings, a smelting flue gas acid-making equipment is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a smelting flue gas acid-making equipment in view of the shortcomings of the prior art. The fan blades can rotate under the impact of the desulfurization liquid, thereby causing the nozzle to rotate, and then the flue gas and liquid can be in contact with each other over a maximized area, thereby greatly improving the desulfurization efficiency and solving the problem of low desulfurization efficiency of some existing acid-making equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smelting fume acid-making equipment, comprising a base, a heating tower is fixedly connected to the top of the base, an air intake pipe is fixedly connected to the left side of the top of the heating tower, a butt pipe is fixedly connected to the left side of the air intake pipe, a filter plate 1 is fixedly connected to the inside of the butt pipe, a waste heat recovery component is arranged on the right side of the air intake pipe, a spray tower is fixedly connected to the middle side of the top of the base, a suction pump is installed on the top of the spray tower, a delivery pipe is fixedly connected to the output end of the suction pump, a rotating frame is rotatably connected to the bottom of the delivery pipe, a fixing frame is fixedly connected to the bottom side of the inner bottom of the rotating frame, a connecting shaft is fixedly connected to the top of the fixing frame, a fan blade is fixedly connected to the outside of the connecting shaft, a plurality of nozzles are fixedly connected to the outside of the rotating frame, a reaction tower is fixedly connected to the right side of the top of the base, and an air supply component is arranged on the top of the reaction tower.

[0007] Furthermore, the waste heat recovery component includes a circulation pipe, the left side of the circulation pipe is fixedly connected to the right side of the air inlet pipe, the right side of the circulation pipe is fixedly connected to the air outlet pipe, a water pump 1 is installed on the top of the heating tower, the output end of the water pump 1 is fixedly connected to the output pipe, the input end of the water pump 1 is fixedly connected to the water pumping pipe, and the right side of the air outlet pipe is fixedly connected to the air expansion frame.

[0008] Furthermore, the air supply component includes an air pump 1, the bottom of which is fixedly connected to the top of the reaction tower, the output end of the air pump 1 is fixedly connected to a filter frame, the left side of the filter frame is fixedly connected to an exhaust pipe, the interior of the filter frame is fixedly connected to a filter plate 2, the output end of the air pump 1 is fixedly connected to an air supply pipe, and the interior of the reaction tower is fixedly connected to a catalytic plate.

[0009] Furthermore, a water inlet pipe is fixedly connected to the left side of the top of the heating tower, and an air pump 2 is installed inside the reaction tower.

[0010] Furthermore, the outside of the gas outlet pipe is fixedly connected to the inside of the spray tower, and the top of the rotating frame is rotatably connected to the inner top side of the spray tower.

[0011] Furthermore, a water supply pipe is fixedly connected to the rear side of the exterior of the output pipe, and the exterior of the delivery pipe is fixedly connected to the interior of the spray tower.

[0012] Furthermore, the output end of the second air pump is fixedly connected to an absorption tower, and concentrated sulfuric acid is arranged inside the absorption tower.

[0013] Furthermore, the outer bottom side of the exhaust pipe is fixedly connected to the interior of the spray tower, and the outer bottom side of the air supply pipe is fixedly connected to the interior of the reaction tower.

[0014] The beneficial effects of the utility model are:

[0015] (1) The utility model uses a suction pump to suck the desulfurization liquid, which in turn drives the fan blades to rotate, and then the rotating frame to rotate, at which time the nozzle can rotate, and then the desulfurization liquid and the flue gas can achieve maximum contact area, thereby greatly improving the desulfurization efficiency and thus improving the acid production efficiency.

[0016] (2) The utility model transports the smelting flue gas to the inside of the circulation pipe through the air intake pipe, so that the water inside the heating tower can be heated. At this time, the waste heat in the flue gas can be recycled, which can greatly improve the utilization rate of energy. At the same time, the flue gas can be filtered during the treatment process, thereby greatly improving the acid production efficiency.

[0017] In summary, the utility model has the advantages of high desulfurization efficiency, energy recovery and utilization, and high acid production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the heating tower structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the rotating frame of the utility model;

[0021] Figure 4 This is a schematic diagram of the water inlet pipe structure of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiment 1

[0025] like Figure 1 - Figure 2 As shown, this embodiment provides a smelting flue gas acid-making device, including a base 1, the device is supported by the base 1, the base 1 stabilizes the structure of the entire device, a heating tower 2 is fixedly connected to the top of the base 1, the heating tower 2 is used for preliminary heat removal of the flue gas, an air intake pipe 3 is fixedly connected to the left side of the top of the heating tower 2, the air intake pipe 3 is used to guide the flue gas to be treated into the heating tower 2, the air intake pipe 3 is fixedly connected to the left side of the air intake pipe 3, and a filter plate 5 is fixedly connected to the inside of the butt joint 4, and the filter plate 5 is used for preliminary particulate matter filtering before the flue gas enters the system;

[0026] A waste heat recovery component is arranged on the right side of the air inlet pipe 3, and the waste heat recovery component is designed to utilize the waste heat in the flue gas to save energy. The waste heat recovery component includes a circulation pipe 6, and the left side of the circulation pipe 6 is fixedly connected to the right side of the air inlet pipe 3, and the right side of the circulation pipe 6 is fixedly connected to the outlet pipe 7. A water pump 8 is installed on the top of the heating tower 2, and the water pump 8 is used to extract the hot water inside the heating tower. The output end of the water pump 8 is fixedly connected to the output pipe 9, and the outer rear side of the output pipe 9 is fixedly connected to the water supply pipe. The output pipe 9 transports the water pumped out to a designated location. The input end of the water pump 8 is fixedly connected to the pumping pipe 10, and the left side of the top of the heating tower 2 is fixedly connected to the water inlet pipe 11, and the water inlet pipe 11 is used to add water to the heating tower 2. The right side of the outlet pipe 7 is fixedly connected to the air expansion frame 12, and the function of the air expansion frame 12 is to diffuse the flue gas evenly to prepare for subsequent treatment.

[0027] Embodiment 2

[0028] like Figure 2 - Figure 4 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: a spray tower 13 is fixedly connected to the top middle side of the base 1, and the outside of the air outlet pipe 7 is fixedly connected to the inside of the spray tower 13. Such a design allows smoke to flow from the air outlet pipe 7 into the spray tower 13. A suction pump 14 is installed on the top of the spray tower 13. The suction pump 14 provides power for the spraying process. A delivery pipe 15 is fixedly connected to the output end of the suction pump 14. The outside of the delivery pipe 15 is fixedly connected to the inside of the spray tower 13. The delivery pipe 15 is responsible for delivering the sucked liquid into the spray tower 13. The bottom of the spray tower 13 and the delivery pipe 15 are rotatably connected to a rotating frame 16, the top of the rotating frame 16 is rotatably connected to the inner top side of the spray tower 13, the inner bottom side of the rotating frame 16 is fixedly connected to a fixing frame 17, the top of the fixing frame 17 is fixedly connected to a connecting shaft 18, the outside of the connecting shaft 18 is fixedly connected to a fan blade 19, the fan blade 19 is rotated by the liquid, and the fan blade 19 drives the nozzle 20 to rotate during operation, and a plurality of nozzles 20 are fixedly connected to the outside of the rotating frame 16, allowing the nozzle 20 to rotate around a certain axis.

[0029] Embodiment 3

[0030] like Figure 2 - Figure 4 As shown, the output end of the air pump 1 24 is fixedly connected to an air delivery pipe 25, and the outer bottom side of the air delivery pipe 25 is fixedly connected to the inside of the reaction tower 26. The air delivery pipe 25 delivers the filtered flue gas into the reaction tower 26. The inside of the reaction tower 26 is fixedly connected to a catalytic plate 27, and the catalytic plate 27 promotes the chemical reaction in the flue gas. The inside of the reaction tower 26 is installed with an air pump 28, and the output end of the air pump 28 is fixedly connected to an absorption tower, and concentrated sulfuric acid is arranged inside the absorption tower. The function of the concentrated sulfuric acid arranged inside the absorption tower is to absorb SO2 in the flue gas, thereby generating sulfuric acid.

[0031] Working steps

[0032] Step 1: When the smelting fume begins to be processed, the smelting fume pipe can be connected to the left side of the connecting pipe 4. At this time, the smelting fume will enter the inside of the air intake pipe 3 through the connecting pipe 4. At this time, the large particles of impurities in the fume can be intercepted by the filter plate 5, so that preliminary filtration can be achieved. Then the fume enters the inside of the circulation pipe 6. By flowing in the circulation pipe 6, the water in the heating tower 2 can be heated. At this time, the fume flowing in the circulation pipe 6 can be cooled and cooled, and the water can be pumped out by the water pump 8 with the help of the water pump 8. The hot water heated in the heating tower 2 is transported out through the output pipe 9 by the channel 10 to supply hot water and be used. At this time, the flue gas will enter the interior of the spray tower 13 through the air expansion frame 12. At this time, the desulfurization liquid is extracted from the outside by means of the suction pump 14, and then the fan blades 19 can be impacted by the desulfurization liquid, which can drive the fan blades 19 to rotate, and then drive the rotating frame 16 to rotate. At this time, the desulfurization liquid can be evenly sprayed out through the nozzle 20, thereby greatly increasing the contact area with the flue gas, thereby improving the desulfurization efficiency;

[0033] Step 2: The flue gas is then sucked into the filter frame 22 through the air pump 24 with the help of the exhaust pipe 21, and the flue gas is filtered for the second time with the help of the filter plate 23. The flue gas is then allowed to enter the catalytic plate 27 through the air supply pipe 25, so that the sulfur dioxide in the flue gas can be catalytically oxidized to form sulfur trioxide, and then the sulfur trioxide can be input into the sulfuric acid pool through the air pump 28 for absorption.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smelting flue gas acid-making device, comprising a base, characterized in that: A heating tower is fixedly connected to the top of the base, an air intake pipe is fixedly connected to the left side of the top of the heating tower, a docking pipe is fixedly connected to the left side of the air intake pipe, a filter plate 1 is fixedly connected to the inside of the docking pipe, a waste heat recovery component is arranged on the right side of the air intake pipe, a spray tower is fixedly connected to the middle side of the top of the base, a suction pump is installed on the top of the spray tower, a delivery pipe is fixedly connected to the output end of the suction pump, a rotating frame is rotatably connected to the bottom of the delivery pipe, a fixing frame is fixedly connected to the bottom side of the inner bottom of the rotating frame, a connecting shaft is fixedly connected to the top of the fixing frame, a fan blade is fixedly connected to the outside of the connecting shaft, a plurality of nozzles are fixedly connected to the outside of the rotating frame, a reaction tower is fixedly connected to the right side of the top of the base, and an air supply component is arranged on the top of the reaction tower.

2. The smelting flue gas acid-making equipment according to claim 1, characterized in that: The waste heat recovery component includes a circulation pipe, the left side of the circulation pipe is fixedly connected to the right side of the air inlet pipe, the right side of the circulation pipe is fixedly connected to the air outlet pipe, a water pump 1 is installed on the top of the heating tower, the output end of the water pump 1 is fixedly connected to the output pipe, the input end of the water pump 1 is fixedly connected to the pumping pipe, and the right side of the air outlet pipe is fixedly connected to the air expansion frame.

3. The smelting flue gas acid-making equipment according to claim 1, characterized in that: The air supply component includes an air pump 1, the bottom of which is fixedly connected to the top of the reaction tower, the output end of the air pump 1 is fixedly connected to a filter frame, the left side of the filter frame is fixedly connected to an exhaust pipe, the interior of the filter frame is fixedly connected to a filter plate 2, the output end of the air pump 1 is fixedly connected to an air supply pipe, and the interior of the reaction tower is fixedly connected to a catalytic plate.

4. The smelting flue gas acid-making equipment according to claim 3, characterized in that: A water inlet pipe is fixedly connected to the left side of the top of the heating tower, and an air pump 2 is installed inside the reaction tower.

5. The smelting flue gas acid-making equipment according to claim 2, characterized in that: The outside of the gas outlet pipe is fixedly connected to the inside of the spray tower, and the top of the rotating frame is rotatably connected to the top side of the inside of the spray tower.

6. The smelting flue gas acid-making equipment according to claim 2, characterized in that: The outer rear side of the output pipe is fixedly connected with a water supply pipe, and the outer side of the delivery pipe is fixedly connected to the inside of the spray tower.

7. The smelting flue gas acid-making equipment according to claim 4, characterized in that: The output end of the second air pump is fixedly connected to an absorption tower, and concentrated sulfuric acid is arranged inside the absorption tower.

8. The smelting flue gas acid-making equipment according to claim 3, characterized in that: The outer bottom side of the air extraction pipeline is fixedly connected to the interior of the spray tower, and the outer bottom side of the air delivery pipeline is fixedly connected to the interior of the reaction tower.

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