Mannheim process potassium sulfate tail gas treatment and recovery device

Abstract

The utility model discloses a Mannheim method potassium sulfate tail gas treatment and recovery device which sequentially comprises a heat recovery mechanism, a thermal power generation mechanism, an intelligent monitoring mechanism, a first waste gas treatment mechanism, a second waste gas treatment mechanism and a tail gas conveying mechanism, and the heat recovery mechanism is connected with the thermal power generation mechanism. Tail gas can be preliminarily cooled after passing through the heat recovery mechanism, the heat recovery mechanism can absorb heat of the tail gas, water absorbing the heat is heated through the thermal power generation mechanism, due to the fact that high-temperature hot water can greatly shorten the heating duration and reduce energy consumption, the environment-friendly and energy-saving effects are achieved, and the overall energy efficiency is greatly improved; and energy waste is reduced. Recycled hot water can be used for subsequent thermal power generation and can also be connected with a cleaning sprayer to clean an absorption tower, the labor cost is reduced, and the automation degree is high.

Description

Technical Field

[0001] This utility model relates to the technical field of tail gas treatment and recovery devices, specifically a Mannheim process potassium sulfate tail gas treatment and recovery device. Background Technology

[0002] In chemical production processes, especially in the Mannheim process for potassium sulfate production, tail gas treatment has become an important task for environmental protection and resource recovery. Treatment of tail gas from the Mannheim process potassium sulfate production mainly relies on traditional technologies, including absorption, condensation, incineration, and dilution. While these methods can reduce tail gas emissions and environmental harm to some extent, they have significant drawbacks in terms of heat recovery and energy consumption.

[0003] Traditional technologies often simply treat exhaust gases before releasing them without considering the recovery of heat energy from the exhaust. When the exhaust gas temperature is high, directly introducing it into the environment will result in a significant waste of usable heat energy. Furthermore, it requires a separate electrical connection, making it impossible to use the recovered heat energy for power generation. Overall, the level of automation is insufficient, and energy consumption is high. Summary of the Invention

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a potassium sulfate tail gas treatment and recovery device for the Mannheim process, which can effectively solve the problems mentioned in the background technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A potassium sulfate tail gas treatment and recovery device for the Mannheim process includes, in sequence, a heat recovery mechanism, a thermal power generation mechanism, an intelligent monitoring mechanism, a first waste gas treatment mechanism, a second waste gas treatment mechanism, and a tail gas conveying mechanism. The heat recovery mechanism is connected to the thermal power generation mechanism. The intelligent monitoring mechanism is connected in sequence to the heat recovery mechanism, the thermal power generation mechanism, the first waste gas treatment mechanism, the second waste gas treatment mechanism, and the tail gas conveying mechanism. The first waste gas treatment mechanism and the second waste gas treatment mechanism are respectively connected to the tail gas conveying mechanism. The first waste gas treatment mechanism includes an absorption tower and a spray chamber disposed within the absorption tower. The top of the spray chamber is provided with a solvent sprayer and a cleaning sprayer. The second waste gas treatment mechanism includes a dehumidification tower and a drying chamber disposed within the dehumidification tower. The absorption tower is connected to the dehumidification tower through a pipeline.

[0007] The heat recovery mechanism includes a recovery tower and a heat exchange chamber located inside the recovery tower. The heat exchange chamber is equipped with a heat exchange component, which includes a first heat exchange copper tube and a second heat exchange copper tube. A hot water output valve, an air inlet pipe for inputting exhaust gas, and a water inlet pipe connected to the hot water output valve are provided on one side of the recovery tower. The water inlet pipe is connected to a cleaning sprayer, and a control valve is also provided at the connection between the water inlet pipe and the cleaning sprayer. The first heat exchange copper tube and the second heat exchange copper tube are respectively connected to the air inlet pipe.

[0008] The thermal power generation mechanism includes a nacelle, a heating chamber located within the nacelle, and a generator set. A valve connected to a hot water output valve is provided on one side of the nacelle. The valve is connected to the heating chamber. The heating chamber is equipped with several heaters. A steam storage chamber is also provided on one side of the heating chamber. The steam storage chamber is connected to the generator set via a pipeline. The generator set is sequentially connected to an intelligent monitoring mechanism and an exhaust gas conveying mechanism.

[0009] As a further description of the above technical solution, the intelligent monitoring mechanism includes a signal transmission module, a control module connected to the signal transmission module, several temperature sensors and pressure sensors, with each temperature sensor respectively located in the heat exchange chamber and the heating chamber, and the pressure sensor located in the steam storage chamber.

[0010] As a further description of the above technical solution, the spray chamber and the drying chamber are respectively connected to the exhaust gas conveying mechanism. The exhaust gas conveying mechanism includes a base, a fan installed in the base, a first conveying pipe and a second conveying pipe. The first conveying pipe is connected to the spray chamber and the second conveying pipe is connected to the drying chamber.

[0011] As a further description of the above technical solution, a waste gas diversion valve is provided at the connection between the first heat exchange copper tube and the second heat exchange copper tube and the air inlet pipe. Both the first heat exchange copper tube and the second heat exchange copper tube have a spiral structure and are coaxially arranged.

[0012] As a further description of the above technical solution, the absorption tower is also provided with a waste gas conveying pipe connecting the first heat exchange copper tube and the second heat exchange copper tube, and the waste gas conveying pipe is connected to the spray chamber.

[0013] As a further description of the above technical solution, the top of the dehumidification tower is provided with a discharge pipe, which is connected to the drying chamber. The drying chamber is provided with multiple dryers, which are arranged in a linear manner.

[0014] As a further description of the above technical solution, the outer side of the recovery tower is also provided with a water injection pipe communicating with the heat exchange chamber, and the bottom of the heat exchange chamber is provided with a partition for fixing the first heat exchange copper tube and the second heat exchange copper tube.

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

[0016] The Mannheim process potassium sulfate tail gas treatment and recovery device of this utility model has at least one of the following beneficial effects during use:

[0017] The exhaust gas undergoes preliminary cooling after passing through a heat recovery mechanism, which absorbs the heat from the exhaust gas. The water that absorbs the heat is then heated by a thermal power generation unit. The high-temperature hot water significantly reduces heating time and energy consumption, resulting in environmentally friendly and energy-saving effects. After power generation, the electricity is distributed to the exhaust gas conveying unit, the first waste gas treatment unit, the second waste gas treatment unit, and the intelligent monitoring unit via a transformer and current regulation device, greatly improving overall energy efficiency and reducing energy waste. The recovered hot water can not only be used for subsequent thermal power generation but can also be connected to a cleaning sprayer to clean the absorption tower, reducing labor costs and achieving a high degree of automation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a potassium sulfate tail gas treatment and recovery device according to the Mannheim process of this utility model;

[0019] Figure 2 This is a side view of a potassium sulfate tail gas treatment and recovery device according to the Mannheim process of this utility model.

[0020] Figure 3 This is a schematic diagram of the heat recovery mechanism of a potassium sulfate tail gas treatment and recovery device according to the Mannheim process of this utility model;

[0021] Figure 4 This is a schematic diagram of the thermal power generation mechanism of a potassium sulfate tail gas treatment and recovery device according to the Mannheim process of this utility model.

[0022] Figure 5 This is a schematic diagram of the tail gas treatment mechanism of a potassium sulfate tail gas treatment and recovery device using the Mannheim process according to this utility model.

[0023] Numbering on the map:

[0024] 1. Heat recovery mechanism; 101. Recovery tower; 102. Heat exchange chamber; 103. Air inlet pipe; 104. Water injection pipe; 105. Exhaust gas diversion valve; 106. First heat exchange copper tube; 107. Hot water output valve; 108. Second heat exchange copper tube; 2. Thermal power generation mechanism; 201. Engine room; 202. Heating chamber; 203. Steam storage chamber; 204. Generator set; 205. Heater; 3. Intelligent monitoring mechanism; 301. Signal transmission module; 302. Control module Group; 4. First waste gas treatment mechanism; 401. Absorption tower; 402. Spray chamber; 403. Solvent sprayer; 404. Cleaning sprayer; 405. Control valve; 406. Water inlet pipe; 407. Waste gas conveying pipe; 5. Second waste gas treatment mechanism; 501. Dehumidification tower; 502. Dryer; 503. Discharge pipe; 504. Drying chamber; 6. Tail gas conveying mechanism; 601. Base; 602. First conveying pipe; 603. Fan; 604. Second conveying pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-5 As shown, this utility model provides a potassium sulfate tail gas treatment and recovery device for the Mannheim process, which includes, in sequence, a heat recovery mechanism 1, a thermal power generation mechanism 2, an intelligent monitoring mechanism 3, a first waste gas treatment mechanism 4, a second waste gas treatment mechanism 5, and a tail gas conveying mechanism 6. The heat recovery mechanism 1 is connected to the thermal power generation mechanism 2. The intelligent monitoring mechanism 3 is connected in sequence to the heat recovery mechanism 1, the thermal power generation mechanism 2, the first waste gas treatment mechanism 4, the second waste gas treatment mechanism 5, and the tail gas conveying mechanism 6. The first waste gas treatment mechanism 4 and the second waste gas treatment mechanism 5 are respectively connected to the tail gas conveying mechanism 6. The first waste gas treatment mechanism 4 includes an absorption tower 401 and a spray chamber 402 disposed in the absorption tower 401. The top of the spray chamber 402 is provided with a solvent sprayer 403 and a cleaning sprayer 404. The second waste gas treatment mechanism 5 includes a dehumidification tower 501 and a drying chamber 504 disposed in the dehumidification tower 501. The absorption tower 401 is connected to the dehumidification tower 501 through a pipeline.

[0027] In this embodiment, the exhaust gas is initially cooled after passing through the heat recovery mechanism 1. The heat recovery mechanism 1 absorbs the heat from the exhaust gas, and the water that has absorbed the heat is heated by the thermal power generation mechanism 2. The high-temperature hot water significantly reduces heating time and energy consumption, resulting in environmentally friendly and energy-saving effects. The steam generated after heating the water acts on the generator set 204. The steam is stored in a steam storage chamber and maintained at a certain pressure. It is then transported through pipelines to the air inlet of the turbine in the generator set 204, driving the turbine blades to rotate. The turbine's rotation directly drives the generator connected to it. The magnetic field inside the generator interacts with a conductor (such as copper wire), and according to Faraday's law of electromagnetic induction, the generator converts mechanical energy into electrical energy. After power generation, the current is transmitted to the power grid or other loads through the power distribution system. In this embodiment, the generated electricity is distributed to the exhaust gas conveying mechanism 6, the first exhaust gas treatment mechanism 4, the second exhaust gas treatment mechanism 5, and the intelligent monitoring mechanism 3 through a transformer and current regulation device, significantly improving overall energy efficiency and reducing energy waste.

[0028] The heat recovery mechanism 1 includes a recovery tower 101 and a heat exchange chamber 102 disposed within the recovery tower 101. The heat exchange chamber 102 is provided with a heat exchange assembly, which includes a first heat exchange copper tube 106 and a second heat exchange copper tube 108. A hot water output valve 107, an air inlet pipe 103 for inputting exhaust gas, and a water inlet pipe 406 connected to the hot water output valve 107 are provided on one side of the recovery tower 101. The water inlet pipe 406 is connected to a cleaning sprayer 404. A control valve 405 is also provided at the connection between the water inlet pipe 406 and the cleaning sprayer 404. The first heat exchange copper tube 106 and the second heat exchange copper tube 108 are respectively connected to the air inlet pipe 103.

[0029] In this embodiment, heat from the exhaust gas is transferred to the water in the heat exchange chamber 102, thus initially reducing the temperature of the exhaust gas. The hot water obtained after heat exchange can also be delivered to the thermal power generation unit 2 via the hot water output valve 107. Since the initial temperature of the hot water is close to the boiling point, the thermal power generation unit 2 heats it faster and more energy-efficiently. Simultaneously, this embodiment can also include a separate cooling chamber as needed. The cooling chamber is connected to the absorption tower 401, and the absorption tower 401 is connected to the dehumidification tower 501. The gas that has undergone reaction treatment and drying meets emission standards and is discharged through the discharge pipe 503.

[0030] The hot water output valve 107 is connected to the inlet pipe 406 and the valve of the thermal power generation mechanism 2 respectively. The recovered hot water can not only be used for subsequent thermal power generation, but also be used to clean the absorption tower 401 by connecting the cleaning sprayer 404, reducing labor costs and achieving a high degree of automation.

[0031] The thermal power generation mechanism 2 includes a nacelle 201, a heating chamber 202 located within the nacelle 201, and a generator set 204. A valve connected to a hot water output valve 107 is provided on one side of the nacelle 201. The valve communicates with the heating chamber 202. The heating chamber 202 is provided with several heaters 205. A steam storage chamber 203 is also provided on one side of the heating chamber 202. The steam storage chamber 203 is connected to the generator set 204 through a pipe. The generator set 204 is sequentially connected to an intelligent monitoring mechanism 3 and an exhaust gas conveying mechanism 6.

[0032] In this embodiment, the heating chamber 202 is equipped with multiple heaters 205, and the flow rate of hot water from the heat recovery mechanism 1 can be controlled by a valve connected to the hot water output valve 107. The heaters 205 continue to heat the hot water until it is converted into steam. High-temperature, high-pressure steam is generated through the heating of the hot water. This steam provides a continuous power source in the heating chamber 202 to drive the generator set 204. The generated steam is stored in the steam storage chamber 203 for controlled and stable supply to the generator set 204, ensuring the continuity and stability of the power generation process. The stored steam is transported to the generator set 204 through pipelines, and the steam drives the turbine to rotate, thereby converting mechanical energy into electrical energy.

[0033] Furthermore, the intelligent monitoring mechanism 3 includes a signal transmission module 301, a control module 302 connected to the signal transmission module 301, and several temperature sensors and pressure sensors. Each of the temperature sensors is respectively located in the heat exchange chamber 102 and the heating chamber 202, and the pressure sensor is located in the steam storage chamber 203.

[0034] The intelligent monitoring mechanism 3 enables the normal operation and control of all components. The control module 302 controls each valve within the mechanism, while the signal transmission module 301 collects data from various sensors in real time and transmits it to the control module 302. The control module 302 then executes corresponding control commands based on the received data to ensure the equipment operates in optimal condition. Fluid temperature is monitored in the heat exchange chamber 102 and heating chamber 202, and steam pressure is monitored in the steam storage chamber 203. By monitoring temperature and pressure, the system can optimize the thermal energy conversion process, ensuring maximum power generation efficiency. For example, real-time temperature monitoring helps adjust the hot water flow rate, ensuring the heater 205 operates in optimal condition.

[0035] Furthermore, the spray chamber 402 and the drying chamber 504 are respectively connected to the exhaust gas conveying mechanism 6. The exhaust gas conveying mechanism 6 includes a base 601, a fan 603 disposed in the base 601, a first conveying pipe 602 and a second conveying pipe 604. The first conveying pipe 602 is connected to the spray chamber 402, and the second conveying pipe 604 is connected to the drying chamber 504.

[0036] The exhaust gas, after passing through the exhaust gas conveying mechanism 6, is transported to the absorption tower 401, where it is thoroughly neutralized by the solvent sprayer 403. Specifically, absorbents such as lime milk (calcium hydroxide) are used to remove residual sulfur dioxide, converting it into calcium sulfate and reducing the acidity of the exhaust gas. Finally, the treated gas is transported to the dehumidification tower, where the drying chamber 504 removes moisture from the gas. The unified air supply system simplifies equipment maintenance and operation, reduces complex interfaces between devices, helps reduce the failure rate, and improves system reliability.

[0037] Furthermore, the first heat exchange copper tube 106 and the second heat exchange copper tube 108 are provided with exhaust gas diversion valves 105 at the connection between them and the air inlet pipe 103. Both the first heat exchange copper tube 106 and the second heat exchange copper tube 108 are spiral structures, and the first heat exchange copper tube 106 and the second heat exchange copper tube 108 are coaxially arranged.

[0038] The first heat exchange copper tube 106 is positioned around the second heat exchange copper tube 108, and both tubes employ a spiral structure. This increases the contact area for fluid flow, improving heat exchange efficiency. The spiral design also reduces turbulence losses, promotes uniform liquid or gas distribution, and better utilizes the heat conduction properties of the tube wall. The coaxial design allows the two heat exchange copper tubes to be arranged on the same vertical axis, effectively utilizing space, resulting in a smaller overall device size while improving heat exchange efficiency. The two tubes enable more efficient heat exchange, enhancing the overall system performance.

[0039] Among them, the exhaust gas diversion valve 105 delivers the uniformly transported exhaust gas to the first heat exchange copper tube 106 and the second heat exchange copper tube 108 respectively, which can evenly distribute the fluid flow, reduce the risk of local overheating or cooling, and ensure the safety and stability of the system.

[0040] Furthermore, the absorption tower 401 is also provided with a waste gas conveying pipe 407 connecting the first heat exchange copper pipe 106 and the second heat exchange copper pipe 108, and the waste gas conveying pipe 407 is connected to the spray chamber 402.

[0041] The other ends of the first heat exchange copper tube 106 and the second heat exchange copper tube 108 are connected to the waste gas conveying pipe 407, which conveys the exhaust gas to the absorption tower 401 for treatment. Inside the absorption tower 401, the spray chamber 402 is sprayed with a solvent sprayer 403, which reacts with the exhaust gas. When the exhaust gas enters the spray chamber 402, it comes into full contact with the sprayed liquid, thus effectively absorbing and removing harmful substances such as sulfur dioxide and chlorine. Similarly, when the spray chamber 402 needs to be cleaned, the control valve 405 can be activated to allow the cleaning sprayer 404 to spray high-temperature hot water onto the spray chamber 402.

[0042] Furthermore, the dehumidification tower 501 is equipped with a discharge pipe 503 at its top, which communicates with the drying chamber 504. The drying chamber 504 contains multiple dryers 502 arranged in a linear fashion. This linear arrangement of dryers 502 ensures sufficient contact time for the airflow as it passes through the dryers 502, thereby improving drying efficiency. The linear arrangement also guarantees uniform airflow distribution across each dryer 502, avoiding dead zones.

[0043] Furthermore, the outer side of the recovery tower 101 is also equipped with a water injection pipe 104 communicating with the heat exchange chamber 102. The bottom of the heat exchange chamber 102 is equipped with a partition for fixing the first heat exchange copper tube 106 and the second heat exchange copper tube 108. After the temperature sensor detects that the liquid temperature in the heat exchange chamber 102 has reached a preset value, room temperature water is reintroduced into the heat exchange chamber 102 through the water injection pipe 104 for heat exchange, thus realizing water circulation.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for treating and recovering potassium sulfate tail gas using the Mannheim process, characterized in that: The system comprises, in sequence, a heat recovery mechanism, a thermal power generation mechanism, an intelligent monitoring mechanism, a first waste gas treatment mechanism, a second waste gas treatment mechanism, and a tail gas conveying mechanism. The heat recovery mechanism is connected to the thermal power generation mechanism. The intelligent monitoring mechanism is sequentially connected to the heat recovery mechanism, the thermal power generation mechanism, the first waste gas treatment mechanism, the second waste gas treatment mechanism, and the tail gas conveying mechanism. The first waste gas treatment mechanism and the second waste gas treatment mechanism are respectively connected to the tail gas conveying mechanism. The first waste gas treatment mechanism includes an absorption tower and a spray chamber located within the absorption tower. The top of the spray chamber is equipped with a solvent sprayer and a cleaning sprayer. The second waste gas treatment mechanism includes a dehumidification tower and a drying chamber located within the dehumidification tower. The absorption tower is connected to the dehumidification tower via a pipeline. The heat recovery mechanism includes a recovery tower and a heat exchange chamber located inside the recovery tower. The heat exchange chamber is equipped with a heat exchange component, which includes a first heat exchange copper tube and a second heat exchange copper tube. A hot water output valve, an air inlet pipe for inputting exhaust gas, and a water inlet pipe connected to the hot water output valve are provided on one side of the recovery tower. The water inlet pipe is connected to a cleaning sprayer, and a control valve is also provided at the connection between the water inlet pipe and the cleaning sprayer. The first heat exchange copper tube and the second heat exchange copper tube are respectively connected to the air inlet pipe. The thermal power generation mechanism includes a nacelle, a heating chamber located within the nacelle, and a generator set. A valve connected to a hot water output valve is provided on one side of the nacelle. The valve is connected to the heating chamber. The heating chamber is equipped with several heaters. A steam storage chamber is also provided on one side of the heating chamber. The steam storage chamber is connected to the generator set via a pipeline. The generator set is sequentially connected to an intelligent monitoring mechanism and an exhaust gas conveying mechanism.

2. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The intelligent monitoring mechanism includes a signal transmission module, a control module connected to the signal transmission module, and several temperature sensors and pressure sensors. Each of the temperature sensors is located in the heat exchange chamber and the heating chamber, and the pressure sensor is located in the steam storage chamber.

3. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The spray chamber and the drying chamber are respectively connected to the exhaust gas conveying mechanism. The exhaust gas conveying mechanism includes a base, a fan installed in the base, a first conveying pipe and a second conveying pipe. The first conveying pipe is connected to the spray chamber and the second conveying pipe is connected to the drying chamber.

4. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The first and second heat exchange copper tubes are equipped with exhaust gas diversion valves at the connection between them and the air inlet pipe. Both the first and second heat exchange copper tubes are spiral structures and are coaxially arranged.

5. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The absorption tower is also equipped with a waste gas conveying pipe that connects the first heat exchange copper tube and the second heat exchange copper tube, and the waste gas conveying pipe is connected to the spray chamber.

6. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The dehumidification tower is equipped with a discharge pipe at the top, which is connected to the drying chamber. The drying chamber is equipped with multiple dryers, which are arranged in a linear manner.

7. The potassium sulfate tail gas treatment and recovery device according to claim 1, characterized in that: The outer side of the recovery tower is also provided with a water injection pipe that communicates with the heat exchange chamber, and the bottom of the heat exchange chamber is provided with a partition for fixing the first heat exchange copper tube and the second heat exchange copper tube.

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