Denitrification and quality improvement device for coal gas purification

Abstract

The utility model discloses a denitrification upgrading device for coal gas purification, and particularly relates to the technical field of coal gas purification, the denitrification upgrading device comprises a first denitrification tank, a second denitrification tank and a third denitrification tank, the top end of the first denitrification tank is communicated with a gas inlet pipe, and a gas inlet electric control valve is mounted on the gas inlet pipe; a first communicating pipe is communicated between the first denitrification tank and the second denitrification tank, a second communicating pipe is communicated between the second denitrification tank and the third denitrification tank, the outer wall of the third denitrification tank is communicated with a nitrogen detector, and a linkage stirring structure is jointly mounted in the first denitrification tank, the second denitrification tank and the third denitrification tank. According to the device, nitrogen in coal gas can be subjected to repeated and circulating denitrification operation, the mixing of the coal gas and a nitrogen adsorbent can be accelerated, the denitrification efficiency of the coal gas is further improved, and more thorough denitrification is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coal gas purification technology, and more specifically, to a denitrification and upgrading device for coal gas purification. Background Technology

[0002] Coal gas includes coke oven gas, water gas, raw coal gas, and blast furnace gas. During the purification process, nitrogen needs to be removed from the gas to improve its quality. Therefore, a denitrification and upgrading device is required to complete the purification operation.

[0003] A search revealed that Chinese patent CN217829557U discloses a denitrification and upgrading device for coal gas purification. This structure, through the setting of a circulation component, can close the electric control valve for inlet and outlet, and open the electric control valve for circulation, thereby starting the circulation fan. The coal gas inside the second denitrification container enters the first connecting pipe, is then pumped into the circulation electric control valve through the circulation pipe, and then enters the first denitrification container through the inlet pipe to continue the purification operation. This can circulate and purify the nitrogen content inside the coal gas, resulting in better denitrification and achieving complete denitrification, thus improving the quality of the coal gas.

[0004] However, in actual use, this structure requires the coal gas to react with nitrogen adsorbents in multiple denitrification cylinders to remove nitrogen during denitrification. Since the nitrogen adsorbents in the multiple denitrification cylinders are in a static state, it is difficult for the coal gas to fully contact and react with the nitrogen adsorbents, which prolongs the reaction time and reduces the denitrification efficiency. In view of this, this utility model proposes a denitrification and upgrading device for coal gas purification. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a denitrification and upgrading device for coal gas purification, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification and upgrading device for coal gas purification, comprising a first denitrification tank, a second denitrification tank, and a third denitrification tank. The top of the first denitrification tank is connected to an air inlet pipe, and an electric air inlet control valve is installed on the air inlet pipe. A first connecting pipe connects the first denitrification tank and the second denitrification tank, and a second connecting pipe connects the second denitrification tank and the third denitrification tank. A nitrogen detector is connected to the outer wall of the third denitrification tank.

[0007] To ensure thorough mixing and reaction of the coal gas and denitrification materials inside the first, second, and third denitrification tanks, thereby improving denitrification efficiency and effectiveness, preferably, a linkage stirring structure is installed inside the first, second, and third denitrification tanks. This linkage stirring structure includes a rotating rod rotatably installed inside each of the three tanks. Several L-shaped stirring rods are fixedly mounted in a ring at the bottom of the rotating rod, and stirring blades are provided at the top of each stirring rod. The stirring blades are fixedly connected to the rotating rod. The tops of the three rotating rods extend to the tops of the first, second, and third denitrification tanks, respectively. Sealing devices are embedded in the tops of the first, second, and third denitrification tanks. The rotating rod is rotatably connected to the first denitrification tank, the second denitrification tank, and the third denitrification tank via sealed bearings. An L-shaped bracket is fixedly installed on the top of each of the three denitrification tanks. The top of the rotating rod is rotatably connected to the corresponding L-shaped bracket. A transmission wheel is fixedly installed on the outside of each of the three rotating rods, and a transmission belt is installed between every two adjacent transmission wheels. A drive motor is installed on the top of one of the rotating rods. The drive motor is fixedly installed on the corresponding L-shaped bracket, and its output end is fixedly connected to the corresponding rotating rod. Several anti-slip teeth are provided on the outer wall of the transmission wheel and the inner wall of the transmission belt, and these anti-slip teeth on the transmission wheel and the transmission belt mesh with each other.

[0008] To further process the substandard coal gas through recirculation and denitrification, preferably, the outer wall of the inlet pipe is connected to a circulation pipe, and a circulation electric control valve is installed on the circulation pipe. The bottom of the third denitrification tank is connected to a conveying pipe, and a circulation fan is installed at the bottom of the conveying pipe. An external discharge pipe is installed at the output end of the circulation fan, and an external discharge electric control valve is installed on the external discharge pipe. The input end of the circulation fan is connected to the conveying pipe, and the output end of the circulation fan is connected to the external discharge pipe. One end of the external discharge pipe is connected to the circulation pipe.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] 1. By setting up a linkage stirring structure, using a drive motor as power, and through the cooperation of transmission wheels and transmission belts, the three rotating rods rotate in the first denitrification tank, the second denitrification tank, and the third denitrification tank respectively, which in turn drives the L-shaped stirring rod and stirring blade to rotate, ensuring full contact between the nitrogen adsorbent and the coal gas, and improving the denitrification efficiency;

[0011] 2. The coal gas is processed sequentially through the first, second, and third denitrification tanks, which greatly improves the denitrification effect and ensures that the nitrogen content of the coal gas is significantly reduced after purification. When the nitrogen detector indicates that the nitrogen content in the coal gas does not meet the standard, the circulating fan and the electric control valve work together to send the coal gas back to the inlet pipe for denitrification again, which further ensures the denitrification quality and improves work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a three-dimensional schematic diagram of the linkage stirring structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the connection structure between the rotating rod and the sealed bearing of this utility model.

[0015] Figure 4 This is a schematic diagram of the connection structure between the rotating tube and the intake tube of this utility model.

[0016] Figure 5 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0017] The attached diagram is labeled as follows: 1. First denitrification tank; 2. Second denitrification tank; 3. Third denitrification tank; 4. Inlet pipe; 5. Electric inlet control valve; 6. First connecting pipe; 7. Second connecting pipe; 8. Nitrogen detector; 9. Rotating rod; 10. L-shaped stirring rod; 11. Stirring blade; 12. L-shaped bracket; 13. Drive wheel; 14. Drive belt; 15. Drive motor; 16. Circulation pipe; 17. Electric circulation control valve; 18. Conveying pipe; 19. Circulation fan; 20. Outlet pipe; 21. Electric outlet control valve; 22. Sealed bearing. Detailed Implementation

[0018] 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.

[0019] As attached Figure 1-5The denitrification and upgrading device for coal gas purification shown includes a first denitrification tank 1, a second denitrification tank 2, and a third denitrification tank 3. The top of the first denitrification tank 1 is connected to an air inlet pipe 4, and an electric air inlet control valve 5 is installed on the air inlet pipe 4. A first connecting pipe 6 connects the first denitrification tank 1 and the second denitrification tank 2, and a second connecting pipe 7 connects the second denitrification tank 2 and the third denitrification tank 3. A nitrogen detector 8 is connected to the outer wall of the third denitrification tank 3.

[0020] Specifically, in this structure, the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3 can adsorb nitrogen in the coal gas multiple times. First, the inlet electric control valve 5 is opened, and the coal gas is transported to the inside of the first denitrification tank 1 through the inlet pipe 4. The coal gas is pre-treated by the nitrogen adsorbent inside the first denitrification tank 1, achieving first-stage treatment. Next, the first connecting pipe 6 transports the coal gas to the inside of the second denitrification tank 2 again, and it is treated again by the nitrogen adsorbent inside the second denitrification tank 2, achieving second-stage treatment. Finally, the coal gas is transported to the inside of the third denitrification tank 3 through the second connecting pipe 7, and the nitrogen adsorbent inside the third denitrification tank 3 performs the final denitrification treatment, achieving third-stage treatment. The nitrogen detector 8 on the outer wall of the third denitrification tank 3 is used to detect the nitrogen content in the coal gas.

[0021] It is worth noting that there are no specific restrictions on the types of nitrogen adsorbents inside the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3.

[0022] The structure of this application is described in detail below:

[0023] In this embodiment, as shown in the appendix Figure 1 , 2As shown in Figure 3, the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3 are all equipped with a linkage stirring structure. The linkage stirring structure includes a rotating rod 9 rotatably installed inside each of the three tanks. Several L-shaped stirring rods 10 are fixedly installed in a ring shape at the bottom of the rotating rod 9, and stirring blades 11 are provided at the top of each stirring rod. The stirring blades 11 are fixedly connected to the rotating rod 9. The tops of the three rotating rods 9 extend to the tops of the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3, respectively. Sealed bearings 22 are embedded in the tops of the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3. The rotating rods 9 are connected to the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3 via the sealed bearings 22. The denitrification tank 3 is rotatably connected. The top of the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3 are fixedly installed with L-shaped brackets 12. The top of the rotating rod 9 is rotatably connected to the corresponding L-shaped bracket 12. The exterior of each of the three rotating rods 9 is fixedly installed with a transmission wheel 13, and a transmission belt 14 is installed between each pair of adjacent transmission wheels 13. The top of one of the rotating rods 9 is installed with a drive motor 15. The drive motor 15 is fixedly installed on the corresponding L-shaped bracket 12, and the output end of the drive motor 15 is fixedly connected to the corresponding rotating rod 9. The outer wall of the transmission wheel 13 and the inner wall of the transmission belt 14 are provided with several anti-slip teeth, and the anti-slip teeth on the transmission wheel 13 and the anti-slip teeth on the transmission belt 14 mesh with each other.

[0024] Specifically, in this structure, since the nitrogen in the coal gas needs to react with the nitrogen adsorbent in the first denitrification tank 1, the second denitrification tank 2 and the third denitrification tank 3 to remove nitrogen, and since the nitrogen adsorbent in the first denitrification tank 1, the second denitrification tank 2 and the third denitrification tank 3 is in a static state, it is difficult to make the coal gas and the nitrogen adsorbent fully contact and react, which prolongs the reaction time and reduces the denitrification efficiency.

[0025] Furthermore, when the coal gas reacts with the nitrogen adsorbent in the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3, the structure uses a drive motor 15 to drive one of the rotating rods 9 to rotate. With the cooperation of the transmission wheel 13 and the transmission belt 14, the three rotating rods 9 rotate in the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3 respectively. This, in turn, drives the L-shaped stirring blade 11 and the stirring blade 11 to rotate. The L-shaped stirring blade 11 is used to stir and mix the nitrogen adsorbent in the first denitrification tank 1, the second denitrification tank 2, and the third denitrification tank 3, while the stirring blade 11 is used to mix the coal gas, thereby ensuring sufficient contact between the nitrogen adsorbent and the coal gas and improving the denitrification efficiency.

[0026] It is worth noting that in this structure, since the outer wall of the transmission wheel 13 and the inner wall of the transmission belt 14 are provided with several anti-slip teeth that interlock with each other, and there is a certain tension between the transmission wheel 13 and the transmission belt 14, there will be no slippage between the transmission wheel 13 and the transmission belt 14.

[0027] In this embodiment, as shown in the appendix Figure 1 , 4 As shown in Figure 5, the outer wall of the air inlet pipe 4 is connected to the circulation pipe 16, and the circulation pipe 16 is equipped with a circulation electric control valve 17. The bottom of the third denitrification tank 3 is connected to the conveying pipe 18, and the bottom of the conveying pipe 18 is equipped with a circulation fan 19. The output end of the circulation fan 19 is equipped with an external discharge pipe 20, and the external discharge pipe 20 is equipped with an external discharge electric control valve 21. The input end of the circulation fan 19 is connected to the conveying pipe 18, and the output end of the circulation fan 19 is connected to the external discharge pipe 20. The external discharge pipe 20 is connected to one end of the circulation pipe 16.

[0028] Specifically, in this structure, in order to achieve the cyclic denitrification treatment of coal gas, after the coal gas is denitrified in the third denitrification tank 3, if the nitrogen detector 8 detects that the nitrogen content in the coal gas is still high, the external discharge electric control valve 21 is closed and the circulation electric control valve 17 is opened. The circulation fan 19 is started to transport the coal gas back to the inside of the inlet pipe 4 through the conveying pipe 18, the external discharge pipe 20 and the circulation pipe 16, and finally it enters the inside of the first denitrification tank 1 again for denitrification treatment, so as to achieve the purpose of cyclic denitrification.

[0029] Working principle of this utility model:

[0030] This application provides a denitrification and upgrading device for coal gas purification. In specific use, firstly, the inlet electric control valve 5 is opened, and the coal gas enters the first denitrification tank 1 through the inlet pipe 4. The nitrogen adsorbent inside the first denitrification tank 1 performs preliminary adsorption treatment on the nitrogen in the coal gas, achieving primary denitrification. The coal gas after primary treatment enters the second denitrification tank 2 through the first connecting pipe 6. The nitrogen adsorbent inside the second denitrification tank 2 performs secondary denitrification treatment on the coal gas, achieving secondary treatment. The coal gas then enters the third denitrification tank 3 through the second connecting pipe 7, and the nitrogen adsorbent inside the third denitrification tank 3 performs final denitrification treatment, completing tertiary treatment.

[0031] The nitrogen detector 8 on the outer wall of the third denitrification tank 3 monitors the nitrogen content in the treated gas in real time. Once it is detected that the nitrogen content in the treated gas of the third denitrification tank 3 is still high, the external discharge electric control valve 21 is closed, the circulation electric control valve 17 is opened, the circulation fan 19 is started, and the gas returns to the inlet pipe 4 through the conveying pipe 18, the external discharge pipe 20 and the circulation pipe 16, and re-enters the first denitrification tank 1 for circulation denitrification treatment until the nitrogen content reaches the standard. Then, the external discharge electric control valve 21 is opened, and qualified gas is discharged through the external discharge pipe 20.

[0032] During the reaction of coal gas with nitrogen adsorbent in each denitrification tank, drive motor 15 starts, driving the connected rotating rod 9 to rotate. The transmission wheel 13 on the rotating rod 9 drives the transmission wheels 13 on the other two rotating rods 9 to rotate through the transmission belt 14, so that the three rotating rods 9 rotate synchronously in the first, second and third denitrification tanks 3 respectively. The L-shaped stirring rod 10 at the bottom of the rotating rod 9 stirs the nitrogen adsorbent in each denitrification tank, and the stirring blade 11 at the top stirs the coal gas, promoting full contact between the nitrogen adsorbent and the coal gas and improving the denitrification efficiency.

[0033] It should be noted that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, and will not be described here.

[0034] In addition, the main technical solution of this application is to add a linkage stirring structure to the existing device to ensure that the coal gas and nitrogen adsorbent are fully mixed and improve the denitrification efficiency. Other parts not fully described are the disclosed parts of the existing device and will not be described in detail here.

[0035] 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, improvements, etc., 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 denitrification and upgrading device for coal gas purification, comprising a first denitrification tank (1), a second denitrification tank (2), and a third denitrification tank (3), characterized in that: The top of the first denitrification tank (1) is connected to an air inlet pipe (4), and an air inlet electric control valve (5) is installed on the air inlet pipe (4). A first connecting pipe (6) connects the first denitrification tank (1) and the second denitrification tank (2). A second connecting pipe (7) connects the second denitrification tank (2) and the third denitrification tank (3). A nitrogen detector (8) is connected to the outer wall of the third denitrification tank (3). A linkage stirring structure is installed inside the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3). The linkage stirring structure includes a rotating rod (9) rotatably installed inside the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3). The bottom of the rotating rod (9) is fixedly installed with several L-shaped stirring rods (10) in a ring shape, and the top of the stirring rod is provided with stirring blades (11). The stirring blades (11) are fixedly connected to the rotating rod (9). The top ends of the three rotating rods (9) extend to the top of the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3) respectively. The top of the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3) are fixedly installed with L-shaped brackets (12). The top ends of the rotating rods (9) are rotatably connected to the corresponding L-shaped brackets (12). The exterior of the three rotating rods (9) is fixedly installed with transmission wheels (13), and a transmission belt (14) is installed between each pair of adjacent transmission wheels (13). A drive motor (15) is installed at the top end of one of the rotating rods (9).

2. The denitrification and upgrading device for coal gas purification according to claim 1, characterized in that: The outer wall of the air inlet pipe (4) is connected to a circulation pipe (16), and a circulation electric control valve (17) is installed on the circulation pipe (16). The bottom of the third denitrification tank (3) is connected to a conveying pipe (18), and a circulation fan (19) is provided at the bottom of the conveying pipe (18). An external discharge pipe (20) is installed at the output end of the circulation fan (19), and an external discharge electric control valve (21) is installed on the external discharge pipe (20).

3. The denitrification and upgrading device for coal gas purification according to claim 2, characterized in that: The input end of the circulating fan (19) is connected to the conveying pipe (18), and the output end of the circulating fan (19) is connected to the external discharge pipe (20). The external discharge pipe (20) is connected to one end of the circulating pipe (16).

4. The denitrification and upgrading device for coal gas purification according to claim 1, characterized in that: Sealed bearings (22) are embedded in the top of the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3), and the rotating rod (9) is rotatably connected to the first denitrification tank (1), the second denitrification tank (2) and the third denitrification tank (3) respectively through the sealed bearings (22).

5. The denitrification and upgrading device for coal gas purification according to claim 1, characterized in that: The drive motor (15) is fixedly mounted on the corresponding L-shaped bracket (12), and the output end of the drive motor (15) is fixedly connected to the corresponding rotating rod (9).

6. The denitrification and upgrading device for coal gas purification according to claim 1, characterized in that: The outer wall of the transmission wheel (13) and the inner wall of the transmission belt (14) are provided with a number of anti-slip teeth, and the anti-slip teeth on the transmission wheel (13) and the anti-slip teeth on the transmission belt (14) mesh with each other.

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