Desulfurizing agent regeneration device

Abstract

The utility model discloses a desulfurizing agent regenerating device which comprises a lower sealing head, a main body section cylinder body and an upper sealing head which are sequentially arranged from bottom to top, a lower water cap plate is arranged between the lower sealing head and the main body section cylinder body, an upper water cap plate is arranged between the main body section cylinder body and the upper sealing head, and water caps are distributed on the water cap plates. The upper sealing head is provided with an ionic liquid inlet pipe, an alkali liquid inlet pipe, a desalted water inlet pipe and a compressed air inlet pipe, the main body section cylinder is filled with desulfurizer regeneration resin, and the lower sealing head is provided with an ionic liquid outlet pipe, an alkali liquid outlet pipe and a desalted water outlet pipe; valves are respectively arranged on the ionic liquid inlet pipe, the alkali liquid inlet pipe, the desalted water inlet pipe, the compressed air inlet pipe, the ionic liquid outlet pipe, the alkali liquid outlet pipe and the desalted water outlet pipe. The upper sealing head of the desulfurizing agent regeneration device can be connected with the expansion section cylinder or the main body section cylinder through bolts. The size of the expansion section cylinder can be determined according to the use amount of the sulfate radical selective resin, and the storage capacity of the novel desulfurizing agent regeneration device is expanded.

Description

Technical Field

[0001] This utility model relates to the field of desulfurizing agent regeneration system for sulfuric acid production tail gas from copper smelting, and specifically to a desulfurizing agent regeneration device. Background Technology

[0002] Copper ore in nature mostly exists as sulfide minerals, such as chalcopyrite (CuFeS2), chalcocite (Cu2S), and bornite (Cu5FeS4). During smelting, sulfur is oxidized at high temperatures to form sulfur dioxide. After the acid production process, over 99% is converted into sulfur trioxide, producing concentrated sulfuric acid as a product. However, the absorbed flue gas still contains 200 mg / Nm³ of sulfur dioxide. 3 Sulfur dioxide at concentrations around [value missing] is an air pollutant that poses a significant threat to the environment and human health.

[0003] The most commonly used method for removing acidic gases from flue gas in industry is the limestone / lime-gypsum absorption method, which uses limestone or lime slurry as an absorbent to control emissions by reacting with acidic gases in the flue gas. This method is technically mature and has high desulfurization efficiency, but it also generates a lot of waste, producing CO2 and wastewater during SO2 absorption, and limestone is difficult to recycle. Other flue gas desulfurization methods include seawater and ammonia methods. With increasingly stringent environmental protection requirements, traditional desulfurization methods can no longer meet the needs of industrial production, and many enterprises have begun to adopt greener, more efficient, and environmentally friendly desulfurization technologies. Ionic liquids, as a new type of solvent, are non-volatile, non-flammable, and have good stability, making them a suitable gas trapping material. However, during the desulfurization process, ionic liquids (such as piperazines and morpholine-based liquids) may undergo oxidation side reactions after absorbing SO2, generating sulfate ions: SO2 + H2O + O2 → SO42- 2− +H + (Under oxidizing conditions). The accumulation of sulfate ions leads to: 1. Reduced SO2 absorption capacity due to occupation of active sites, resulting in decreased ionic liquid performance; 2. Increased metal corrosion due to acidic sulfates; 3. Impact on SO2 desorption kinetics, leading to reduced regeneration efficiency.

[0004] Traditional regeneration methods use ion exchange columns filled with sulfate-selective adsorption resin. The regeneration steps are as follows: 1. Adsorption stage (feed): Ionic liquid containing sulfate flows through the resin bed, and the resin selectively adsorbs sulfate. The purified ionic liquid is returned to the desulfurization system for recycling. 2. Alkali washing (regeneration): High-concentration hydroxide ions replace sulfate ions on the resin. 3. Water washing (residue removal): The resin bed is rinsed with deionized water to remove residual sodium hydroxide and free sulfate ions.

[0005] The column is a single unit, and the amount of resin added is fixed. Replacement can only be done through a small manhole, making the operation cumbersome and time-consuming. When switching regeneration steps, liquid from the previous step remains in the column, causing a reaction that affects subsequent equipment.

[0006] Therefore, how to optimize the regeneration process as effectively as possible is a problem worth studying. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a desulfurizing agent regeneration device.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A desulfurizing agent regeneration device includes a lower end cap, a main body section, and an upper end cap arranged sequentially from bottom to top, all with the same diameter. A lower water cap plate is provided between the lower end cap and the main body section, and an upper water cap plate is provided between the main body section and the upper end cap. Water caps are distributed on the water cap plates. The upper end cap is provided with an ionic liquid inlet pipe, an alkali liquid inlet pipe, a demineralized water inlet pipe, and a compressed air inlet pipe. The main body section is filled with desulfurizing agent regeneration resin. The lower end cap is provided with an ionic liquid outlet pipe, an alkali liquid outlet pipe, and a demineralized water outlet pipe. Valves are respectively provided on the ionic liquid inlet pipe, the alkali liquid inlet pipe, the demineralized water inlet pipe, the compressed air inlet pipe, the ionic liquid outlet pipe, the alkali liquid outlet pipe, and the demineralized water outlet pipe.

[0010] Furthermore, the upper part of the main section cylinder is provided with an extension section cylinder of the same diameter, and an upper water cap plate is provided between the extension section cylinder and the upper end cap. The extension section cylinder and the main section cylinder are filled with desulfurizing agent regenerated resin.

[0011] Furthermore, a resin discharge pipe is provided at the lower part of the main body cylinder, and a valve is provided on the resin discharge pipe.

[0012] Furthermore, the upper end cap, the upper water cap plate, and the main body section are connected by bolts; the main body section, the lower water cap plate, and the lower end cap are connected by bolts.

[0013] Furthermore, the upper end cap, upper water cap plate, and extension section cylinder are connected by bolts; the extension section cylinder and the main section cylinder are directly connected by bolts, and the main section cylinder, lower water cap plate, and lower end cap are connected by bolts.

[0014] The upper end cap of the desulfurizer regeneration device of this application can be connected to the extension section cylinder or the main section cylinder via connecting bolts. The size of the extension section cylinder can be determined according to the amount of sulfate selective resin used, thereby expanding the storage capacity of the desulfurizer regeneration device. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the desulfurizing agent regeneration device of this application. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited thereto.

[0017] A desulfurizing agent regeneration device, such as Figure 1 As shown, a desulfurizing agent regeneration device includes, from bottom to top, a lower end cap (not labeled in the figure), a main section cylinder 7, an extension section cylinder 6, and an upper end cap 4, all with the same diameter. A lower water cap plate 8 is provided between the lower end cap and the main section cylinder 7, and an upper water cap plate 5 is provided between the extension section cylinder 6 and the upper end cap 4. Water caps 18 are distributed on the upper water cap plate 5 and the lower water cap plate 8. The upper end cap 4 is provided with an ion liquid inlet pipe 1, an alkali liquid inlet pipe 22, a demineralized water inlet pipe 23, and a compressed air inlet pipe 19. An ion liquid inlet valve 2 is provided on the ion liquid inlet pipe 1, and an alkali liquid inlet valve 2 is provided on the alkali liquid inlet pipe 22. The upper part is equipped with an alkali inlet valve 21, the demineralized water inlet pipe 23 is equipped with a demineralized water inlet valve 3, the compressed air inlet pipe 19 is equipped with a compressed air inlet valve 20, the extension section cylinder 6 and the main section cylinder 7 are filled with desulfurizing agent regeneration resin (specifically sulfate selective adsorption resin 16), the lower end cap is equipped with an ion liquid outlet pipe 10, a demineralized water outlet pipe 11 and an alkali outlet pipe 13, the ion liquid outlet pipe 10 is equipped with an ion liquid outlet valve 9, the demineralized water outlet pipe 11 is equipped with a demineralized water outlet valve 12, and the alkali outlet pipe 13 is equipped with an alkali outlet valve 14.

[0018] The lower part of the main body section 7 is provided with a resin discharge pipe 15, and a valve (not marked in the figure) is provided on the resin discharge pipe 15.

[0019] The outer edge of the upper water cap plate 5 extends out of the extension section cylinder 6, and the outer edge of the lower water cap plate 8 extends out of the main section cylinder 7. Flanges are provided at the bottom of the outer wall of the upper head 4, the outer periphery of the top and bottom of the extension section cylinder 6, the outer periphery of the top and bottom of the main section cylinder 7, and the top of the outer wall of the lower head. The flanges of the upper head 4, the outer edge of the upper water cap plate 5, and the flange at the top of the extension section cylinder 6 are connected by connecting bolts 17. The bottom flange of the extension section cylinder 6 and the top flange of the main section cylinder 7 are connected by connecting bolts. The flanges at the bottom of the main section cylinder 7, the outer edge of the lower water cap plate 8, and the flange at the top of the lower head are connected by connecting bolts.

[0020] The upper end cap 4 of the desulfurizing agent regeneration device can be connected to the extended section cylinder 6 or the main section cylinder 7 via connecting bolts 17.

[0021] The size of the extension section 6 can be determined according to the amount of sulfate selective adsorption resin 16 used, thereby expanding the storage capacity of the desulfurizing agent regeneration device.

[0022] The upper water cap plate 5 and the lower water cap plate 8 ensure that the sulfate selective adsorption resin 16 is stably placed in the bed of the main section 7. The sealing size of the metal tower-type water cap 18 used should be determined according to the diameter of the sulfate selective resin 16.

[0023] The resin replacement operation can be performed by adding water to guide the resin to the resin discharge pipe for complete discharge, or by disassembling the upper end cap 4 and the upper water cap plate 5 for partial replacement.

[0024] During feeding, liquid can be introduced through the ionic liquid inlet pipe 1 and discharged through the ionic liquid outlet pipe 10, forming an upward-inward and downward-outward gravity flow. Alternatively, liquid can be introduced through the ionic liquid outlet pipe 10 and discharged through the ionic liquid inlet pipe 1, forming a downward-inward and upward-outward full-coverage replacement. During this process, the liquid can be adjusted through the ionic liquid inlet valve 2 and the ionic liquid outlet valve 9.

[0025] During feeding, the demineralized water can be fed through the demineralized water inlet pipe 23 and discharged through the demineralized water outlet pipe 11, forming an upward-inward and downward-outward gravity flow. Alternatively, the demineralized water can be fed through the demineralized water outlet pipe 11 and discharged through the demineralized water inlet pipe 23, forming a downward-inward and upward-outward full-coverage replacement. During this process, the demineralized water inlet valve 3 and the demineralized water outlet valve 12 can be used for adjustment.

[0026] During feeding, the alkali solution can be fed through the alkali solution inlet pipe 22 and discharged through the alkali solution outlet pipe 13, forming an upward inlet and downward outlet gravity flow. Alternatively, the alkali solution can be fed through the alkali solution outlet pipe 13 and discharged through the alkali solution inlet pipe 22, forming a downward inlet and upward outlet full-coverage replacement. During this process, the alkali solution inlet valve 21 and the alkali solution outlet valve 14 can be used for adjustment.

[0027] Each time the regeneration step is switched, compressed air is blown through the compressed air inlet pipe 19, controlled by the compressed air inlet valve 20. During the blowing, the corresponding bottom liquid outlet valve is opened to blow away the liquid in the regeneration device to avoid residue affecting the next reaction.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the specific implementation of this utility model and not to limit it. Those skilled in the art should understand that any equivalent substitutions or obvious modifications made to the implementation of this utility model without changing its performance or use, without violating the spirit of this utility model, should be covered within the scope of protection claimed by this utility model.

Claims

1. A desulfurizing agent regeneration device, characterized in that, The structure includes a lower end cap, a main body section, and an upper end cap, arranged sequentially from bottom to top with the same diameter. A lower water cap plate is provided between the lower end cap and the main body section, and an upper water cap plate is provided between the main body section and the upper end cap. Water caps are distributed on the water cap plates. The upper end cap is equipped with an ion liquid inlet pipe, an alkali liquid inlet pipe, a demineralized water inlet pipe, and a compressed air inlet pipe. The main body section is filled with desulfurizing agent regeneration resin. The lower end cap is equipped with an ion liquid outlet pipe, an alkali liquid outlet pipe, and a demineralized water outlet pipe. Valves are provided on the ion liquid inlet pipe, the alkali liquid inlet pipe, the demineralized water inlet pipe, the compressed air inlet pipe, the ion liquid outlet pipe, the alkali liquid outlet pipe, and the demineralized water outlet pipe.

2. The desulfurizing agent regeneration device according to claim 1, characterized in that, The upper part of the main section cylinder is provided with an extension section cylinder of the same diameter. An upper water cap plate is provided between the extension section cylinder and the upper end cap. The extension section cylinder and the main section cylinder are filled with desulfurizing agent regenerated resin.

3. The desulfurizing agent regeneration device according to claim 1 or 2, characterized in that, The lower part of the main section cylinder is equipped with a resin discharge pipe, and a valve is installed on the resin discharge pipe.

4. The desulfurizing agent regeneration device according to claim 1, characterized in that, The upper end cap, upper water cap plate, and main body section are connected by bolts; the main body section, lower water cap plate, and lower end cap are connected by bolts.

5. The desulfurizing agent regeneration device according to claim 2, characterized in that, The upper end cap, upper water cap plate, and extension section cylinder are connected by bolts; the extension section cylinder and the main section cylinder are directly connected by bolts, and the main section cylinder, lower water cap plate, and lower end cap are connected by bolts.

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