Desulfurizing tower residue recycling system

Abstract

The utility model discloses a system for recycling residues in a desulfurizing tower. The system comprises the desulfurizing tower, a centrifugal machine, a fluidized bed, a belt conveyor and a finished product area, the desulfurizing tower is connected with the centrifugal machine through a pipeline, the centrifugal machine is connected with the fluidized bed, and the fluidized bed is connected with the finished product area; the desulfurization tower is used for treating sulfide, and sulfur is converted into ammonium sulfate slurry through chemical reaction with liquid ammonium; the centrifugal machine is used for carrying out solid-liquid separation on the ammonium sulfate slurry; the fluidized bed is used for drying the ammonium sulfate solid separated by the centrifugal machine; and the belt conveyer is used for conveying the dried ammonium sulfate from the fluidized bed to the finished product area. By means of the devices, ammonium sulfate can be cleaned in time without shutdown, and recycling of residues of the desulfurization tower is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the chemical industry field, in particular to a system for recycling residual substances in a desulfurization tower. BACKGROUND

[0002] Ammonium sulfate is a multifunctional chemical substance, and its application fields are very wide. In the agricultural field, ammonium sulfate is a high-efficiency nitrogen fertilizer and sulfur fertilizer, which is suitable for various soils and crops. In the environmental protection field, ammonium sulfate can be used for ammonia nitrogen removal in the wastewater treatment process, and ammonia nitrogen is converted into nitrogen gas through a chemical reaction and discharged into the atmosphere, so as to reduce water pollution. In the textile industry, ammonium sulfate can be used for the production of dyes and pigments, and the treatment process of textiles. In the pharmaceutical industry, ammonium sulfate can be used as an auxiliary material or an intermediate in the production process of certain pharmaceutical products. Ammonium sulfate plays an important role in multiple fields.

[0003] In the sulfur-burning sulfuric acid process, sulfur is burned in air to generate sulfur dioxide. The generated sulfur dioxide gas needs to undergo further conversion reaction, and is usually reacted with oxygen to generate sulfur trioxide under the action of a catalyst, and the sulfur trioxide is then absorbed by water to generate sulfuric acid. In this process, if ammonia gas exists, the sulfuric acid will react with the ammonia gas to generate ammonium sulfate.

[0004] In the prior art, ammonium sulfate is a by-product generated in the sulfur-burning sulfuric acid process. A desulfurization tower is used to store a large amount of ammonium sulfate, and the ammonium sulfate is corrosive, which can corrode the equipment if not cleaned in time. If the ammonium sulfate is cleaned, the machine needs to be stopped, and the by-product ammonium sulfate needs to be manually processed, and the by-product ammonium sulfate cannot be recycled, which causes high production cost and low production efficiency. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems, the application provides a system for recycling residual substances in a desulfurization tower.

[0006] The technical solutions provided in the application are described below:

[0007] The application provides a system for recycling residual substances in a desulfurization tower, which comprises:

[0008] A desulfurization tower, a centrifuge, a fluidized bed, a belt conveyor and a finished product area;

[0009] The desulfurization tower is connected with the centrifuge through a pipeline, the centrifuge is connected with the fluidized bed, and the fluidized bed is connected with the finished product area.

[0010] The desulfurization tower is used for treating sulfides, and the sulfur is converted into ammonium sulfate slurry through a chemical reaction with liquid ammonia;

[0011] The centrifuge is used for separating the ammonium sulfate slurry into solid and liquid.

[0012] The fluidized bed is used to dry the ammonium sulfate solid separated by the centrifuge;

[0013] The belt conveyor is used to transport the dried ammonium sulfate from the fluidized bed to the finished product area.

[0014] Optionally, the centrifuge is connected with the fluidized bed through the belt conveyor.

[0015] Optionally, the centrifuge is provided with a first outlet and a second outlet, the first outlet being a solid outlet and the second outlet being a liquid outlet.

[0016] Optionally, the first outlet transports the ammonium sulfate solid to the fluidized bed through the belt conveyor.

[0017] Optionally, the second outlet is connected with the desulfurization tower through a pipeline, and the liquid is returned to the desulfurization tower for recycling through the pipeline.

[0018] Optionally, the centrifuge is provided with a solid-liquid control valve for controlling the solid-liquid ratio of solid-liquid separation.

[0019] Optionally, the fluidized bed is provided with a temperature control valve for controlling the temperature of the fluidized bed.

[0020] Optionally, the fluidized bed is provided with an air flow control valve for controlling the air flow speed of the fluidized bed.

[0021] Optionally, the fluidized bed is connected with the finished product area through the belt conveyor.

[0022] Optionally, the belt conveyor is provided with a driving device, and the belt conveyor moves the belt through the driving device.

[0023] From the above technical solutions, the present application has the following advantages:

[0024] The sulfide is reacted to generate ammonium sulfate slurry through the desulfurization tower, the ammonium sulfate slurry is subjected to solid-liquid separation through the centrifuge to obtain ammonium sulfate solid, the ammonium sulfate solid is dried through the fluidized bed to obtain dried ammonium sulfate, and the dried ammonium sulfate is finally conveyed to the finished product area through the belt conveyor. Through these devices, the ammonium sulfate can be cleaned in time without stopping and spending labor, not only saving labor, but also realizing recycling of the desulfurization tower residue of sulfuric acid production from sulfur, ensuring normal operation of production, improving production efficiency, and reducing production cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 An embodiment structure schematic diagram of the system for recycling the desulfurization tower residue provided by the present application.

[0026] Figure 2 A structure diagram of a centrifugal machine in a system for recycling residual materials from a desulfurization tower according to the present application is provided;

[0027] Figure 3 A structure diagram of a fluidized bed in a system for recycling residual materials from a desulfurization tower according to the present application is provided;

[0028] Figure 4 A structure diagram of a belt conveyor in a system for recycling residual materials from a desulfurization tower according to the present application is provided. DETAILED DESCRIPTION

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings, and are used only to describe the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0030] In addition, the above-mentioned partial terms, in addition to being used to indicate the orientation or positional relationship, can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0031] In addition, the terms "mount", "set", "provided with", "connect", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or constituent parts. Those of ordinary skill in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0032] In addition, the structures, proportions, sizes, etc. shown in the drawings in the present application are only used to cooperate with the content disclosed in the specification, to enable those of ordinary skill in the art to understand and read, and do not have technical significance, and any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0033] The technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] The present application provides a system for recycling desulfurization tower residues, which can clean the desulfurization tower residues in time, realize recycling of the desulfurization tower residues, ensure normal operation of production, improve production efficiency, and reduce production cost.

[0035] Please refer to Figure 1 , Figure 1 An embodiment structure schematic diagram of the system for recycling desulfurization tower residues provided by the present application is shown in the figure; the desulfurization tower 01, centrifuge 02, fluidized bed 03, belt conveyor 04, and finished product area 05 will be briefly introduced as follows:

[0036] The desulfurization tower 01 is a device specially used for removing sulfides in industrial waste gas, usually adopting a tower structure, and converting harmful gases into harmless substances through chemical reaction. The desulfurization tower 01 utilizes the principle of gas-liquid contact, and realizes full contact of waste gas and absorbent through spraying and packing, so as to realize chemical absorption and conversion of pollutants. The desulfurization tower 01 can ensure desulfurization effect while minimizing energy consumption and avoiding secondary pollution.

[0037] The centrifuge 02 is a device for realizing solid-liquid separation by using centrifugal force. In the production process of ammonium sulfate, the centrifuge 02 separates the solid and liquid in the ammonium sulfate slurry by generating strong centrifugal force through high-speed rotation, and the solid enters the fluidized bed 03, and the liquid is recycled back to the desulfurization tower 01.

[0038] The fluidized bed 03 is a device for drying granular materials. In the production process of ammonium sulfate, the fluidized bed 03 uniformly dries the ammonium sulfate solid separated by the centrifuge 02 by adjusting the temperature and air flow rate.

[0039] The belt conveyor 04 is a conveying device composed of rollers and a conveying belt. When working, the conveying belt runs under the driving of the driving device through the friction and tension force between the roller and the conveying belt, so as to achieve the purpose of conveying.

[0040] The finished product area 05 is an area in a factory workshop or warehouse specially used for storing finished products that have been processed and inspected. The main function of the finished product area 05 is to classify, store and manage the products completed by production, so as to ensure that the products are in good condition before leaving the factory.

[0041] One embodiment of the system for recycling the residue of the desulfurization tower in the embodiments of the present application comprises a desulfurization tower 01, a centrifuge 02, a fluidized bed 03, a belt conveyor 04, and a finished product area 05.

[0042] The desulfurization tower 01 is connected to the centrifuge 02 through a pipeline, the centrifuge 02 is connected to the fluidized bed 03, and the fluidized bed 03 is connected to the finished product area 05.

[0043] The desulfurization tower 01 is used for treating sulfides, and converts sulfur into ammonium sulfate slurry through a chemical reaction with liquid ammonia.

[0044] In the desulfurization tower 01, the reaction of sulfides with liquid ammonia converts sulfur dioxide in the sulfides into ammonium sulfate through two reactions of absorption and oxidation, thereby achieving purification of waste gas and recycling of resources.

[0045] Absorption reaction: when the flue gas enters the desulfurization tower 01, the sulfur dioxide therein first undergoes a preliminary absorption reaction with ammonia water to generate ammonium sulfite. As the reaction proceeds, the ammonium sulfite further reacts with sulfur dioxide and water to generate ammonium bisulfite. The ammonium bisulfite continues to react with ammonia water to generate ammonium sulfite again, ensuring that more sulfur dioxide is absorbed.

[0046] Oxidation reaction: the ammonium sulfite and ammonium bisulfite generated in the absorption process are oxidized by oxygen in the air in the oxidation layer to ultimately form stable ammonium sulfate.

[0047] The sulfides and liquid ammonia in the desulfurization tower 01 convert harmful sulfur dioxide into ammonium sulfate products through two reactions of absorption and oxidation, thereby reducing air pollution, achieving recycling of resources, and having an important environmental protection effect.

[0048] The centrifuge 02 is used for separating the ammonium sulfate slurry into solids and liquids.

[0049] The centrifuge 02 is a device that uses centrifugal force to achieve solid-liquid separation. The centrifuge 02 separates solids and liquids through a process of generating a strong centrifugal force by high-speed rotation. When the centrifuge 02 contains a suspension of fine particles that is stationary, the centrifuge 02 separates the particles through the action of the gravitational field, with heavier particles sinking faster and lighter particles floating. The centrifuge 02 generates a strong centrifugal force by high-speed rotation, thereby accelerating the settling speed of solid particles in the solution and achieving solid-liquid separation.

[0050] When the ammonium sulfate slurry enters the centrifuge 02, the ammonium sulfate solid particles are thrown to the outside due to the centrifugal force, and the liquid remains on the inside, thereby achieving solid-liquid separation. The ammonium sulfate slurry is separated through solid-liquid separation, thereby reducing product loss, reducing energy consumption, and reducing the cost of treating sulfides.

[0051] Fluidized bed 03 is used to dry the ammonium sulfate solids separated by centrifuge 02;

[0052] Fluidized bed 03 is a reactor that uses gas or liquid to pass through the layer of granular solids, making the solid particles in a suspended state of motion, and carrying out gas-solid phase reaction process or liquid-solid phase reaction process. When the speed of the fluid passing through the bed layer gradually increases to a certain value, the particles become loose, the void increases, the bed volume expands, and the particles are all suspended in the fluid when the speed continues to increase, showing characteristics similar to liquid. By heating the air and increasing the gas flow rate, the ammonium sulfate solid particles are suspended in the bed layer to form a fluidized state. In the fluidized state, the ammonium sulfate particles are in full contact with the hot air, thereby achieving uniform drying.

[0053] Fluidized bed 03 drying technology suspends solid particles in the air flow to form a state similar to a fluid, allowing the material to be in full contact with hot air, achieving rapid and uniform drying effect and shortening the drying time. Since the material is in a suspended state in the fluidized bed 03, direct contact between the material and the wall is avoided, reducing the wear and breakage of the material, thereby maintaining the integrity of the product and meeting the quality requirements of the product. The fluidized bed 03 dryer adopts a fully enclosed structure, effectively preventing cross-contamination of the material with the outside environment and reducing environmental pollution during production.

[0054] Belt conveyor 04 is used to transport dried ammonium sulfate from fluidized bed 03 to finished product area 05.

[0055] Belt conveyor 04 is a device that transfers materials from one place to another through a continuously moving conveyor belt. Belt conveyor 04 mainly relies on the friction between the driving drum and the redirection drum to drive the conveyor belt to run, and the material placed on the conveyor belt moves with it, thereby achieving the transfer of the material. In the production process of ammonium sulfate, belt conveyor 04 is used to transport ammonium sulfate solids to fluidized bed 03; and is used to transport dried ammonium sulfate from fluidized bed 03 to finished product area 05.

[0056] Transporting ammonium sulfate solids through belt conveyor 04 reduces manual intervention and achieves automation of transportation, improving production efficiency.

[0057] In this embodiment, sulfides are reacted to form ammonium sulfate slurry through desulfurization tower 01, ammonium sulfate slurry is subjected to solid-liquid separation through centrifuge 02 to obtain ammonium sulfate solids, ammonium sulfate solids are dried through fluidized bed 03 to obtain dried ammonium sulfate, and dried ammonium sulfate is finally conveyed to finished product area 05 through belt conveyor 04. Through these devices, ammonium sulfate can be cleaned in time without stopping and spending labor, not only reducing manual intervention, but also realizing the recycling of sulfur and desulfurization tower 01 residues, ensuring the normal operation of production, improving production efficiency, and reducing production cost.

[0058] Referring to Figure 2 , Figure 2 The centrifuge 02 in the system for recycling the residue of the desulfurization tower 01 provided in the present application is shown in the structural schematic diagram. In the system for recycling the residue of the desulfurization tower 01, solid-liquid separation is performed by the centrifuge 02.

[0059] Optionally, the centrifuge 02 is connected with the fluidized bed 03 through the belt conveyor 04. Optionally, the centrifuge 02 is provided with a first outlet 0201 and a second outlet 02, the first outlet 0201 being a solid outlet, and the second outlet 02 being a liquid outlet. Optionally, the first outlet 0201 transports the ammonium sulfate solid to the fluidized bed 03 through the belt conveyor 04. Optionally, the second outlet 02 is connected with the desulfurization tower 01 through a pipeline, and the liquid is returned to the desulfurization tower 01 for recycling through the pipeline. Optionally, the centrifuge 02 is provided with a solid-liquid control valve 0203 for controlling the liquid-solid ratio of the solid-liquid separation.

[0060] The ammonium sulfide slurry generated after the reaction of the desulfurization tower 01 enters the centrifuge 02 for solid-liquid separation, the separated solid enters the first outlet 0201 and is transported to the fluidized bed 03 through the belt conveyor 04, and the separated liquid enters the second outlet 02 and is returned to the 01 for recycling through the pipeline. The centrifuge 02 is provided with a solid-liquid control valve 0203 for controlling the feeding and separation. By adjusting the solid-liquid control valve 0203, the amount and proportion of the ammonium sulfide slurry entering the centrifuge 02 can be accurately controlled, so that the separation effect is ensured to be in the best state.

[0061] During the centrifugal separation process, the solid-liquid control valve can be dynamically adjusted according to the real-time feedback signal as the material changes to maintain the best separation state. For example, when it is detected that the material layer is full, the feeding valve is closed, the solid-liquid material is automatically separated, and after the signal disappears, the feeding valve is opened again to continue feeding.

[0062] In the present embodiment, the solid-liquid control valve of the centrifuge 02 mainly adjusts and controls the feeding amount to ensure that the best solid-liquid ratio is achieved during the separation process. The solid-liquid control valve 0203 plays an important role in the separation process of the centrifuge 02, which not only greatly improves the production efficiency but also ensures the quality of the product.

[0063] Referring to Figure 3 , Figure 3 The fluidized bed 03 in the system for recycling the residue of the desulfurization tower 01 provided in the present application is shown in the structural schematic diagram. After the solid-liquid separation of the ammonium sulfate, the solid enters the fluidized bed 03 for drying.

[0064] Optionally, the fluidized bed 03 is provided with a temperature control valve 0301 to control the temperature of the fluidized bed 03. The temperature control valve 0301 adjusts the flow of fluid by changing the valve core according to the signal from the control system, thereby controlling the temperature inside the fluidized bed 03.

[0065] The temperature control valve 0301 of the fluidized bed 03 can achieve rapid response and high precision temperature control, which is crucial for avoiding overheating and maintaining ideal reaction conditions. By using advanced automated control systems, the temperature control valve can work in coordination with other equipment to optimize the entire production process.

[0066] Optionally, the fluidized bed 03 is provided with an air flow control valve 0302 to control the air flow speed of the fluidized bed 03. The air flow control valve 0302 is made of corrosion-resistant and high-temperature-resistant materials and is provided with a sealed shell to prevent high-temperature damage. The air flow control valve 0302 adjusts the air flow of the fluid by changing the valve core according to the signal from the control system. The air flow control valve 0302 is mainly used to adjust and control the flow rate of the gas to maintain the stable operation of the system.

[0067] In this embodiment, the fluidized bed 03 is used in conjunction with the control system through the temperature control valve 0301 and the air flow control valve 0302 to adjust the temperature and air flow of the fluidized bed 03, which is beneficial to improve the drying rate of ammonium sulfide and thus improve the efficiency and safety of production.

[0068] Please refer to Figure 4 , Figure 4 The structure diagram of the belt conveyor 04 in the system for recycling the residue of the desulfurization tower 01 provided in the present application.

[0069] Optionally, the fluidized bed 03 is connected to the finished product area 05 through the belt conveyor 04. The dried ammonium sulfate is transported to the finished product area 05 through the belt conveyor 04.

[0070] Optionally, the belt conveyor 04 is provided with a driving device, and the belt conveyor 04 drives the belt to move through the driving device. The driving device is provided with a motor, which provides power to the driving roller 0402 during operation. The driving roller 0402 and the conveyor belt 0401 have friction to drive the conveyor belt 0401 to move, thereby realizing continuous transportation of ammonium sulfate.

[0071] The ammonium sulfide solid is transported from the centrifuge 02 to the fluidized bed 03 for drying through the belt conveyor 04, and the dried ammonium sulfide is transported to the finished product area 05 through the belt conveyor 04, which can effectively reduce the demand for manual labor, realize efficient material transportation, and improve the efficiency of production.

[0072] It is to be understood that the embodiments that have been described above are merely illustrative and that changes and modifications can be made to those embodiments without departing from the scope of the application. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of these embodiments.

Claims

1. A system for recovering and reusing desulfurization tower residue, characterized by, The application relates to a desulfurization tower, a centrifuge, a fluidized bed, a belt conveyor and a finished product area. The desulfurization tower is connected with the centrifuge through a pipeline, the centrifuge is connected with the fluidized bed, and the fluidized bed is connected with the finished product area. The desulfurization tower is used for treating sulfides, and converts sulfur into ammonium sulfate slurry through chemical reaction with liquid ammonia. The centrifuge is used for separating the ammonium sulfate slurry into solid and liquid. The fluidized bed is used for drying the ammonium sulfate solid separated by the centrifuge. The belt conveyor is used for conveying the dried ammonium sulfate from the fluidized bed to the finished product area. The centrifuge is connected with the fluidized bed through the belt conveyor.

2. The system for recovering and reusing the desulfurizing tower residue according to claim 1, wherein, The centrifuge is provided with a first outlet and a second outlet, wherein the first outlet is a solid outlet, and the second outlet is a liquid outlet.

3. The system for recovering and reusing the desulfurizing tower residue according to claim 1, wherein, The first outlet is used for conveying the ammonium sulfate solid to the fluidized bed through the belt conveyor.

4. The system for recovering and reusing the desulfurizing tower residue according to claim 3, wherein, The second outlet is connected with the desulfurization tower through a pipeline, and the liquid is returned to the desulfurization tower through the pipeline for recycling.

5. The system for recycling the desulfurizing tower residue according to claim 3, wherein The centrifuge is provided with a solid-liquid control valve, which is used for controlling the solid-liquid ratio of solid-liquid separation.

6. The system for recovering and reusing the desulfurizing tower residue according to any one of claims 1 to 5, characterized in that, The fluidized bed is provided with a temperature control valve, which is used for controlling the temperature of the fluidized bed.

7. The system for recovering and reusing the desulfurizing tower residue according to any one of claims 1 to 5, characterized in that, The fluidized bed is provided with an air flow control valve, which is used for controlling the air flow speed of the fluidized bed.

8. The system for recovering and reusing the desulfurizing tower residue according to any one of claims 1 to 5, characterized in that, The fluidized bed is connected with the finished product area through the belt conveyor.

9. The system for recovering and reusing the desulfurizing tower residue according to any one of claims 1 to 5, characterized in that, The belt conveyor is provided with a driving device, and the belt conveyor is driven to move by the driving device.

10. The system for recovering and reusing the desulfurizing tower residue according to any one of claims 1 to 5, characterized in that, ​

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