Desulfurization and denitration activated carbon activation equipment with gas circulation system

Abstract

The utility model discloses a desulfurization and denitration active carbon activation equipment with gas circulation system, it includes reaction bin, gas distributor, gas recovery pipeline and heat exchange component. Gas distributor realizes even distribution of gas through multilayer gas guide hole design, and heat exchange component recovers high temperature gas and reduces temperature efficiently, and heat preservation layer reduces heat loss. The application can improve gas utilization rate and active carbon activation efficiency significantly, solve the problems of uneven gas distribution, high energy consumption etc. in traditional equipment, provide economic and efficient solution for industrial flue gas treatment.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection and chemical equipment technology, and in particular to a desulfurization and denitrification activated carbon activation device with a gas circulation system. Background Technology

[0002] Currently, activated carbon for desulfurization and denitrification is increasingly widely used in industrial flue gas treatment. Since activated carbon gradually loses its activity during use, it needs to be regenerated through activation equipment to restore its performance. However, existing activated carbon activation equipment suffers from low gas utilization efficiency, resulting in high energy consumption and unsatisfactory treatment effects. Typically, the high-temperature gas generated during activation is directly emitted, failing to fully participate in the activation reaction, leading to resource waste. Furthermore, existing equipment has shortcomings in gas distribution uniformity, potentially affecting the activation quality of the activated carbon, especially during large-scale continuous processing. To improve gas utilization and activation efficiency, some equipment attempts to adopt a simple gas reflux design, but this increases structural complexity and operating costs. Utility Model Content

[0003] The purpose of this utility model is to provide a desulfurization and denitrification activated carbon activation device with a gas circulation system, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a desulfurization and denitrification activated carbon activation device with a gas circulation system. The device mainly consists of a reaction chamber, a gas distributor installed within the reaction chamber, a gas recovery pipeline connected to the reaction chamber, and a heat exchange assembly installed on the gas recovery pipeline. The gas distributor is connected to the inner wall of the reaction chamber via a fixed bracket and has multiple partitioned chambers inside, each of which is connected to the reaction chamber through an independent gas guide hole. The reaction chamber has an inlet at the top and an outlet at the bottom, both connected to an external conveying device via flanges. One end of the gas recovery pipeline connects to the exhaust port at the top of the reaction chamber, and the other end connects to the inlet of the heat exchange assembly. The outlet of the heat exchange assembly connects to the inlet of the gas distributor via a return pipeline.

[0005] The gas distributor employs a multi-layered structure, with each layer fixed together by bolts and sealed with gaskets between adjacent layers to prevent gas leakage. Each layer of the gas distributor has several air guide holes, with the diameter of the holes gradually increasing from the center outwards to achieve uniform gas distribution within the activated carbon bed. The inner walls of the air guide holes are polished, with a surface roughness controlled below Ra0.8, thereby reducing resistance losses during gas flow. The gas inlet of the gas distributor is located at the bottom layer, connecting to the return pipe of the gas recovery pipeline via threads and sealed with a sealing ring.

[0006] The heat exchange assembly includes a shell, a heat exchange tube bundle housed within the shell, and cooling water inlets and outlets mounted on the outside of the shell. The heat exchange tube bundle consists of multiple parallel metal tubes, each welded at both ends to the upper and lower tube sheets of the shell, forming a closed heat exchange channel. The cooling water inlets and outlets are located on both sides of the shell and connected to an external cooling water system via flanges. The outer wall of the heat exchange tube bundle is coated with a corrosion-resistant coating to improve its service life in high-temperature environments. A filter screen is installed at the inlet of the heat exchange assembly to intercept particulate matter in the gas, preventing it from entering the heat exchange tube bundle and causing blockage.

[0007] The gas recovery pipeline is made of high-temperature resistant material, and its inner wall is equipped with spiral guide vanes at a 30° helix angle to guide the gas flow axially along the pipeline and reduce eddy currents. A pressure regulating valve is located in the middle of the gas recovery pipeline, bolted to the pipeline, and its pressure is monitored in real time by a sensor. The valve core of the pressure regulating valve is made of ceramic, which has excellent wear resistance and high-temperature resistance.

[0008] The inner wall of the reaction chamber is equipped with an insulation layer composed of multiple layers of ceramic fiber boards, bonded together with a high-temperature resistant adhesive. The insulation layer is 50mm thick, effectively reducing heat loss and improving energy efficiency. The outer wall of the reaction chamber has an observation window made of high-temperature resistant glass, secured to the chamber with bolts, allowing operators to monitor the internal conditions in real time.

[0009] This invention achieves uniform gas distribution within the activated carbon bed through a multi-layered gas distributor design, avoiding the problem of uneven gas distribution in traditional equipment. Simultaneously, the integration of the gas recovery pipeline and heat exchange components allows for the recovery and reuse of high-temperature gases generated during activation, significantly improving gas utilization. The efficient heat exchange capacity of the heat exchange components lowers the gas temperature, reducing the heat load on subsequent equipment. Furthermore, the insulation layer design on the inner wall of the reaction chamber further reduces heat loss and lowers overall energy consumption.

[0010] This utility model features a reasonable structural design, clear connection methods between components, and strong operability. Through the aforementioned technical means, it solves the problems of low gas utilization, uneven gas distribution, and high energy consumption in existing equipment, significantly improving the activation efficiency and quality of desulfurization and denitrification activated carbon while reducing operating costs, providing a more economical and efficient solution for industrial flue gas treatment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the connection relationship between the reaction chamber, gas distributor, gas recovery pipeline and heat exchange components.

[0012] Figure 2 This is a cross-sectional schematic diagram of the gas distributor, which shows in detail its multi-layer design and the distribution of the gas guide holes.

[0013] Figure 3 This is a partially enlarged schematic diagram of the heat exchange assembly, highlighting the arrangement of the heat exchange tube bundle and the cooling water inlet and outlet.

[0014] The attached diagram is labeled as follows: 1. Reaction chamber; 2. Gas distributor; 3. Gas recovery pipeline; 4. Heat exchange assembly; 5. Feed inlet; 6. Discharge outlet; 7. Gas guide hole; 8. Return pipeline; 9. Heat exchange tube bundle; 10. Cooling water inlet and outlet; 11. Pressure regulating valve; 12. Insulation layer; 13. Observation window. Detailed Implementation

[0015] The specific implementation method of the desulfurization and denitrification activated carbon activation equipment with a gas circulation system of this utility model is as follows: Figures 1 to 3 The structure, connections, and operation of the equipment are described in detail. The reaction chamber 1 is the core component of the entire equipment. It has a cylindrical structure and houses a gas distributor 2. It has an inlet 5 at the top and an outlet 6 at the bottom. The inlet 5 and outlet 6 are connected to an external conveying device via flanges to achieve continuous material input and output. The gas distributor 2 is connected to the inner wall of the reaction chamber 1 via a fixed bracket. Its internal design is a multi-layered structure, with each layer fixed by bolts and equipped with sealing gaskets to prevent gas leakage. Each layer of the gas distributor 2 has several air guide holes 7, with the diameter of the holes gradually increasing from the center outwards. The inner wall of the air guide holes is polished to reduce gas flow resistance. The air inlet of the gas distributor 2 is located at the bottom layer and connects to the return pipe 8 via threads, achieving a sealed connection through a sealing ring.

[0016] One end of the gas recovery pipeline 3 connects to the exhaust port at the top of the reaction chamber 1, and the other end connects to the inlet of the heat exchange assembly 4. The gas recovery pipeline 3 is made of high-temperature resistant material, and its inner wall is equipped with spiral guide vanes with a spiral angle of 30° to guide the gas axial flow and reduce turbulence. A pressure regulating valve 11 is located in the middle of the gas recovery pipeline 3. The pressure regulating valve 11 is fixed to the pipeline with bolts, and its valve core is made of ceramic material, possessing excellent wear resistance and high-temperature resistance. The pressure regulating valve 11 has a built-in sensor to monitor the gas pressure in the pipeline in real time, ensuring stable gas flow. The return pipeline 8 reintroduces the gas, cooled by the heat exchange assembly 4, into the inlet of the gas distributor 2, thereby achieving gas recycling.

[0017] The heat exchange assembly 4 includes a shell, a heat exchange tube bundle 9, and cooling water inlet and outlet 10. The heat exchange tube bundle 9 consists of multiple parallel metal tubes, with both ends of each tube welded to the upper and lower tube sheets of the shell to form a closed heat exchange channel. The cooling water inlet and outlet 10 are located on both sides of the shell and connected to an external cooling water system via flanges. The outer wall of the heat exchange tube bundle 9 is coated with a corrosion-resistant coating to improve its service life in high-temperature environments. A filter screen is installed at the inlet of the heat exchange assembly 4 to intercept particulate matter in the gas and prevent it from entering the heat exchange tube bundle 9 and causing blockage. The function of the heat exchange assembly 4 is to cool the high-temperature gas introduced into the gas recovery pipeline 3, and at the same time, to remove heat through the circulating cooling water inlet and outlet 10, so that the gas temperature is reduced to a range suitable for re-entry into the gas distributor 2.

[0018] The inner wall of reaction chamber 1 is equipped with an insulation layer 12, which is composed of multiple layers of ceramic fiber boards, bonded together with a high-temperature resistant adhesive. The insulation layer 12 is 50mm thick, effectively reducing heat loss and improving energy efficiency. The outer wall of reaction chamber 1 is equipped with an observation window 13, made of high-temperature resistant glass and fixed to the reaction chamber 1 with clamping bolts, facilitating real-time monitoring of the internal operating conditions by operators.

[0019] During operation, activated carbon raw material enters the reaction chamber 1 through the feed inlet 5 and is then evenly distributed in the bed above the gas distributor 2 under gravity. The gas distributor 2 distributes the gas evenly into the activated carbon bed through the gas guide holes 7. The design of the gas guide holes 7 allows the gas flow rate to gradually increase as it diffuses from the center outward, thus achieving uniform gas distribution throughout the entire bed. The high-temperature gas exits from the exhaust port at the top of the reaction chamber 1 and enters the gas recovery pipeline 3. In the gas recovery pipeline 3, the gas is guided axially by guide vanes to reduce eddy currents. The gas then enters the heat exchange assembly 4, where its temperature is significantly reduced after being cooled by the heat exchange tube bundle 9. The circulating cooling water at the cooling water inlet and outlet 10 carries away the heat. The cooled gas then re-enters the gas distributor 2 through the return pipeline 8, thus achieving gas recycling.

[0020] Throughout the operation, the pressure regulating valve 11 monitors the gas pressure in the gas recovery pipeline 3 in real time. When the pressure is too high or too low, it automatically adjusts the valve core opening to maintain a stable gas flow. The insulation layer 12 on the inner wall of the reaction chamber 1 effectively reduces heat loss and lowers overall energy consumption. Operators can monitor the internal working conditions of the reaction chamber 1 in real time through the observation window 13 to ensure normal equipment operation. Through the above structural design and operating process, the gas distributor 2 achieves uniform gas distribution in the activated carbon bed, avoiding the problem of uneven gas distribution in traditional equipment. At the same time, the combination of the gas recovery pipeline 3 and the heat exchange component 4 allows the high-temperature gas generated during the activation process to be recovered and reused, significantly improving the gas utilization rate. The efficient heat exchange capacity of the complete heat exchange component 4 reduces the gas temperature and reduces the heat load on subsequent equipment. In addition, the design of the insulation layer 12 on the inner wall of the reaction chamber 1 further reduces heat loss and lowers overall energy consumption.

[0021] The equipment is specifically designed for industrial flue gas treatment, particularly suitable for the activation process of desulfurization and denitrification activated carbon. In practical applications, the feed rate and gas flow rate can be adjusted according to production needs to meet the requirements of different production scales. The equipment features a rational overall structural design, clearly defined connections between components, and high operability. It significantly improves the activation efficiency and quality of desulfurization and denitrification activated carbon while reducing operating costs, providing a more economical and efficient solution for industrial flue gas treatment.

[0022] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the operating principle and implementation steps of the device is provided in conjunction with a specific application scenario.

[0023] In the field of industrial flue gas treatment, the activation process of activated carbon for desulfurization and denitrification places high demands on the uniformity of gas distribution and energy utilization efficiency. To meet this requirement, this equipment achieves the recovery and utilization of high-temperature gas through a gas circulation system, significantly improving the activation quality of the activated carbon. The following, in conjunction with the appendix... Figure 1 To be continued Figure 3 It elaborates in detail on the specific operation process of the equipment and the principles behind its technical effects.

[0024] First, the operator feeds the activated carbon raw material to be activated into the reaction chamber 1 through the feed inlet 5. Under the influence of gravity, the activated carbon raw material is evenly distributed along the inner wall of the reaction chamber 1 in the bed above the gas distributor 2. The gas distributor 2 is designed with a multi-layer structure, with each layer fixed together by bolts and equipped with sealing gaskets to prevent gas leakage. Each layer of the gas distributor 2 has several gas guide holes 7, which gradually increase in diameter from the center outwards, and the inner wall is polished to reduce gas flow resistance. When gas passes through the gas distributor 2, the design of the gas guide holes 7 ensures that the gas flow rate gradually increases from the center to the edge, thereby ensuring uniform gas distribution throughout the activated carbon bed. This design effectively avoids the problem of reduced activation quality caused by uneven gas distribution in traditional equipment.

[0025] Subsequently, during the activation process, the high-temperature gas is discharged from the exhaust port at the top of the reaction chamber 1 and enters the heat exchange assembly 4 through the gas recovery pipeline 3. The gas recovery pipeline 3 is made of high-temperature resistant material, and its inner wall is equipped with spiral guide vanes with a spiral angle of 30° to guide the gas axially and reduce turbulence. The pressure regulating valve 11 in the middle of the gas recovery pipeline 3 monitors the gas pressure in the pipeline in real time through a built-in sensor and automatically adjusts the valve opening according to pressure changes to maintain a stable gas flow rate. This design not only improves the stability of gas delivery but also reduces the impact of pressure fluctuations on the activation process.

[0026] After the high-temperature gas enters the heat exchange assembly 4, it exchanges heat with the circulating cooling water introduced through the cooling water inlet and outlet 10 via the heat exchange tube bundle 9. The heat exchange tube bundle 9 consists of multiple parallel metal tubes, with both ends of each tube welded to the upper and lower tube sheets of the shell, forming a closed heat exchange channel. The outer wall of the heat exchange tube bundle 9 is coated with a corrosion-resistant coating to improve its service life in high-temperature environments. A filter screen is installed at the inlet of the heat exchange assembly 4 to intercept particulate matter in the gas and prevent it from entering the heat exchange tube bundle 9 and causing blockage. Through the action of the heat exchange assembly 4, the temperature of the high-temperature gas is significantly reduced, allowing it to re-enter the gas distributor 2 to participate in the activation reaction. This process significantly improves the gas utilization rate while reducing the heat load on downstream equipment.

[0027] The cooled gas is reintroduced into the inlet of the gas distributor 2 through the return pipe 8, thus achieving gas recycling. The connection between the return pipe 8 and the gas distributor 2 is threaded and sealed with a sealing ring to ensure no leakage during gas circulation. Gas recycling not only reduces the direct emission of high-temperature gas but also lowers overall energy consumption.

[0028] During equipment operation, the insulation layer 12 on the inner wall of reaction chamber 1 plays a crucial role. The insulation layer 12 is composed of multiple layers of ceramic fiber boards, each layer bonded together with a high-temperature resistant adhesive. With a thickness of 50mm, it effectively reduces heat loss and improves energy efficiency. Furthermore, the observation window 13 on the outer wall of reaction chamber 1 is made of high-temperature resistant glass and fixed to the reaction chamber 1 with clamping bolts, facilitating real-time monitoring of the internal operating conditions by operators. The design of the observation window 13 allows operators to promptly detect and address any abnormalities, ensuring the stability of equipment operation.

[0029] As can be seen from the above operating steps, this equipment achieves uniform gas distribution in the activated carbon bed through the multi-layered gas distributor 2, avoiding the problem of uneven gas distribution in traditional equipment. Simultaneously, the combination of the gas recovery pipeline 3 and the heat exchange component 4 allows for the recovery and reuse of high-temperature gas generated during activation, significantly improving gas utilization. The high-efficiency heat exchange capacity of the heat exchange component 4 reduces the gas temperature, decreasing the heat load on subsequent equipment. Furthermore, the insulation layer 12 on the inner wall of the reaction chamber 1 further reduces heat loss and lowers overall energy consumption.

[0030] In summary, the overall structure of this equipment is reasonably designed, the connection methods between the components are clearly defined, and it is highly operable. It can significantly improve the activation efficiency and quality of desulfurization and denitrification activated carbon, while reducing operating costs, providing a more economical and efficient solution for industrial flue gas treatment.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A desulfurization and denitrification activated carbon activation device with a gas circulation system, characterized in that, The equipment mainly consists of a reaction chamber (1), a gas distributor (2) installed in the reaction chamber (1), a gas recovery pipeline (3) connected to the reaction chamber (1), and a heat exchange assembly (4) installed on the gas recovery pipeline (3). The gas distributor (2) is connected to the inner wall of the reaction chamber (1) through a fixed bracket. It has multiple partitioned chambers inside, and each chamber is connected to the reaction chamber (1) through an independent air guide hole (7). The top of the reaction chamber (1) is provided with a feed inlet (5) and the bottom is provided with a discharge outlet (6). The feed inlet (5) and the discharge outlet (6) are respectively connected to an external conveying device through flanges. One end of the gas recovery pipeline (3) is connected to the exhaust port at the top of the reaction chamber (1), and the other end is connected to the inlet of the heat exchange assembly (4). The outlet of the heat exchange assembly (4) is connected to the gas inlet of the gas distributor (2) through a return pipeline (8).

2. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 1, characterized in that: The gas distributor (2) adopts a multi-layer structure design, with each layer fixedly connected by bolts and a sealing gasket between adjacent layers; each layer of the gas distributor (2) is provided with several air guide holes (7), the diameter of the air guide holes (7) gradually increases from the center to the outside, the inner wall of the air guide holes (7) is polished and the surface roughness is Ra0.8 or less; the air inlet of the gas distributor (2) is located at the bottom layer, and is connected to the return pipe (8) by threads and sealed by a sealing ring.

3. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 1, characterized in that: The heat exchange assembly (4) includes a shell, a heat exchange tube bundle (9) disposed inside the shell, and a cooling water inlet and outlet (10) installed on the outside of the shell. The heat exchange tube bundle (9) is composed of multiple parallel metal tubes, and the two ends of each metal tube are welded to the upper and lower tube sheets of the shell to form a closed heat exchange channel. The cooling water inlet and outlet (10) are respectively disposed on both sides of the shell and connected to the external cooling water system through flanges. The outer wall of the heat exchange tube bundle (9) is coated with a corrosion-resistant coating, and a filter screen is provided at the inlet of the heat exchange assembly (4).

4. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 1, characterized in that: The gas recovery pipeline (3) is made of high temperature resistant material and has a spiral guide plate on its inner wall with a spiral angle of 30°. The gas recovery pipeline (3) is equipped with a pressure regulating valve (11) in the middle. The pressure regulating valve (11) is fixed to the pipeline by bolts. Its valve core is made of ceramic material. The pressure regulating valve (11) has a built-in sensor to monitor the gas pressure in the pipeline.

5. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 1, characterized in that: The inner wall of the reaction chamber (1) is provided with a heat insulation layer (12), which is made of multiple layers of ceramic fiber boards. Each layer of ceramic fiber boards is bonded and fixed with a high-temperature resistant adhesive. The thickness of the heat insulation layer (12) is 50mm. The outer wall of the reaction chamber (1) is provided with an observation window (13), which is made of high-temperature resistant glass and is fixed to the reaction chamber (1) by clamping bolts.

6. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 2, characterized in that: The diameter of the air guide hole (7) of the gas distributor (2) gradually increases from the center outwards, and the surface roughness of the inner wall of the air guide hole (7) after polishing is less than Ra0.

8.

7. The activated carbon activation equipment for desulfurization and denitrification with a gas circulation system according to claim 4, characterized in that: The inner wall of the gas recovery pipeline (3) is provided with a spiral guide vane with a spiral angle of 30°. The valve core of the pressure regulating valve (11) is made of ceramic material and is fixed to the pipeline with bolts.

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