Device for measuring oxygen content in waste gas of branch flue of coke oven
By designing a coke oven flue exhaust gas oxygen content measurement device, the influence of water vapor is removed and the oxygen concentration is accurately measured, the deviation problem of coke oven production adjustment is solved, and the precise control of coke oven production and energy conservation and emission reduction are achieved.
Patent Information
- Application Number
- CN202422039696.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-21
AI Technical Summary
In the prior art, the oxygen concentration measurement in the flue exhaust gas of the coke oven contains a large amount of water vapor, resulting in a deviation in the measurement results, which cannot accurately guide the production and regulation of the coke oven.
A coke oven flue exhaust gas oxygen content measurement device is designed, including an exhaust gas analyzer, an exhaust gas sampling tube, an exhaust gas transition straight pipe and an exhaust gas cooling water degasser. After extracting the waste gas through the sampling tube and removing water vapor from the cooling water degasser, the oxygen content is measured using the analyzer.
Accurate measurement of the oxygen content of the flue duct of the coking oven is achieved, guiding coking oven production, reducing heat consumption for coking, reducing flue gas nitrogen oxide emissions, reducing operating costs, and achieving energy conservation and emission reduction.
Smart Images
Figure CN223139529U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coke oven production, in particular to an oxygen content measuring device for waste gas in the coke oven's divided flue. Background Art
[0002] At present, the measurement of oxygen concentration in the divided flue of coke ovens in the world is all for wet waste gas measurement, which contains a large amount of water vapor, causing deviation in the true concentration of oxygen and misleading the direction of coke oven production adjustment. The main components of coke oven gas are H2 and CH4, where H2 accounts for about 60% and CH4 accounts for about 20%. Complete combustion will produce a large amount of H2O. In an environment where the divided flue temperature is above 200 degrees, this H2O will exist in the form of water vapor, accounting for about 20% - 25% of the total volume of the waste gas. In the traditional measurement method, these water components will participate in the calculation of oxygen concentration and be used as the denominator for calculating the oxygen content, making the calculation result smaller. Obviously, this measurement and calculation method is incorrect. At present, the oxygen concentration in the waste gas of the divided flue controlled for coke oven production adjustment in the world is the oxygen concentration in dry waste gas. Therefore, the oxygen concentration measured after removing the water in the waste gas of the divided flue can be used as the basis for guiding coke oven production adjustment. Summary of the Invention
[0003] The utility model provides an oxygen content measuring device for waste gas in the coke oven's divided flue, which removes water vapor in the waste gas of the coke oven's divided flue and then measures the oxygen content in the waste gas, effectively solving the influence of water vapor or liquid water on the oxygen concentration in the waste gas, accurately measuring the oxygen concentration in the waste gas, and being able to more accurately control the oxygen content in the coke oven's divided flue and guide coke oven production.
[0004] To achieve the above object, the utility model adopts the following technical solutions:[[]]END
[0005] An oxygen content measuring device for waste gas in the coke oven's divided flue includes a waste gas analyzer, a waste gas sampling pipe, a waste gas transition straight pipe, and a waste gas cooling and water removal device. The sampling end of the waste gas sampling pipe is inserted into the divided flue. One end of the waste gas sampling pipe opposite to the sampling end is connected to the waste gas transition straight pipe. The other end of the waste gas transition straight pipe is connected to the waste gas cooling and water removal device. The other end of the waste gas cooling and water removal device is connected to the waste gas analyzer, and the waste gas analyzer is connected to an external power supply.
[0006] Further, a self-priming pump is provided at the top of the waste gas analyzer, a hole matching the waste gas cooling and water removal device is provided at the bottom, and internal threads matching the installation of the waste gas cooling and water removal device are provided on the inner wall of the hole.
[0007] Further, the waste gas cooling and water removal device includes a water removal outer tube, a diameter-expanded buffer tube, a polymer SAF fiber water-absorbing cotton, and a connecting tube. The upper and lower parts of the water removal outer tube are respectively provided with connecting columns with external threads that are directly connected up and down. The external thread of the upper connecting column matches the waste gas analyzer, and the external thread of the lower connecting column matches the waste gas transition straight tube. The diameter-expanded buffer tube is arranged at the bottom end inside the water removal outer tube, and the bottom of the diameter-expanded buffer tube is connected to the connecting column. The connecting tube is arranged at the top end inside the water removal outer tube and is connected to the upper connecting column. A polymer SAF fiber water-absorbing cotton is arranged between the connecting tube and the inner wall of the water removal outer tube.
[0008] Further, the bottom of the diameter-expanded buffer tube is connected to the lower connecting column of the water removal outer tube, and the upper diameter of the diameter-expanded buffer tube is the same as the inner diameter of the water removal outer tube.
[0009] Further, a baffle is also arranged between the connecting tube and the inner wall of the water removal outer tube, and the polymer SAF fiber water-absorbing cotton is arranged on the baffle between the connecting tube and the inner wall of the water removal outer tube.
[0010] Further, the length of the waste gas sampling tube is 1.5 m to 2 m, and the length of the waste gas transition straight tube is 0.5 m to 0.7 m.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] 1) Through this device, the wet waste gas is extracted from the sub-flue, cooled and dried, the water vapor is removed, and then the oxygen content in the waste gas is measured, effectively solving the influence of water vapor or liquid water on the oxygen concentration in the waste gas;
[0013] 2) By accurately controlling the oxygen content in the coke oven sub-flue with the accurate oxygen concentration and guiding the coke oven production, it can not only ensure that the oxygen content in the waste gas is not excessive, but also ensure that the gas can be completely burned, achieving the purpose of reducing the heat consumption for coking in the coke oven, reducing the emission of nitrogen oxides in the coke oven flue gas, reducing the operation cost of the coke oven, and realizing energy conservation and emission reduction. Description of the Drawings
[0014] Figure 1 is the structural schematic diagram of this device.
[0015] Figure 2 is the front view of the waste gas cooling and water removal device of the present utility model.
[0016] Figure 3 is the sectional view of the waste gas cooling and water removal device of the present utility model.
[0017] Figure 4 is the schematic diagram of the installation position of the polymer SAF fiber water-absorbing cotton of the present utility model.
[0018] In the figure: 1. Exhaust gas analyzer; 2. Exhaust gas cooling and water removal device; 3. Exhaust gas transition straight pipe; 4. Exhaust gas sampling pipe; 5. Branch flue; 6. Connecting column; 7. Outer pipe of water removal device; 8. Diameter-expanding buffer pipe; 9. High-molecular SAF fiber water-absorbing cotton; 10. Baffle; 11. Connecting pipe Detailed implementation manners
[0019] The following further describes the detailed implementation manners of the present utility model in conjunction with the accompanying drawings:
[0020] See Figure 1 , which is a schematic structural diagram of the present utility model. A device for measuring the oxygen content in the exhaust gas of a coke oven branch flue according to the present utility model includes an exhaust gas analyzer 1 with a self-priming pump, an exhaust gas sampling pipe 4, an exhaust gas transition straight pipe 3, and an exhaust gas cooling and water removal device 2. The sampling end of the exhaust gas sampling pipe 4 is inserted into the branch flue 5. One end of the exhaust gas sampling pipe 4 opposite to the sampling end communicates with the exhaust gas transition straight pipe 3. The other end of the exhaust gas transition straight pipe 3 communicates with the exhaust gas cooling and water removal device 2. The other end of the exhaust gas cooling and water removal device 2 communicates with the exhaust gas analyzer 1. The exhaust gas analyzer 1 is connected to an external power source.
[0021] A hole matching the exhaust gas cooling and water removal device 2 is provided at the bottom of the exhaust gas analyzer 1, and internal threads matching the installation of the exhaust gas cooling and water removal device 2 are provided on the inner wall of the hole.
[0022] See Figures 2-4 The exhaust gas cooling and water removal device 2 includes an outer pipe 7 of the water removal device, a diameter-expanding buffer pipe 8, high-molecular SAF fiber water-absorbing cotton 9, a connecting pipe 11, and a baffle 10. Connecting columns 6 with external threads that are vertically through are provided at both the upper and lower parts of the outer pipe 7 of the water removal device. The exhaust gas cooling and water removal device 2 is installed by matching the external threads of the upper connecting column 6 with the internal threads of the hole of the exhaust gas analyzer 1. The exhaust gas cooling and water removal device 2 is installed by matching the external threads of the lower connecting column 6 with the exhaust gas transition straight pipe 3. The diameter-expanding buffer pipe 8 is arranged at the bottom end inside the outer pipe 7 of the water removal device, and the bottom of the diameter-expanding buffer pipe 8 communicates with the connecting column 6. The connecting pipe 11 is arranged at the top end inside the outer pipe 7 of the water removal device and communicates with the upper connecting column 6. The bottom of the diameter-expanding buffer pipe 8 communicates with the lower connecting column 6 of the outer pipe 7 of the water removal device. The upper diameter of the diameter-expanding buffer pipe 8 is the same as the inner diameter of the outer pipe 7 of the water removal device. A baffle 10 is arranged between the connecting pipe 11 and the inner wall of the outer pipe 7 of the water removal device. The high-molecular SAF fiber water-absorbing cotton 9 is arranged on the baffle 10 between the connecting pipe 11 and the inner wall of the outer pipe 7 of the water removal device.
[0023] Working principle: When the branch flue 5 is 2500 mm, the waste gas sampling pipe 4 is set to 1500 mm, the waste gas transition straight pipe 3 is set to 500 mm, and the waste gas cooling water outlet pipe is set to 500 mm. The upper and lower connecting columns 6 of the waste gas cooling water outlet device are both hollow connecting columns 6. The waste gas sampling pipe 4 is inserted 1500 mm deep into the branch flue 5. The waste gas analyzer 1 starts the self-priming pump to make the high-temperature waste gas in the branch flue 5 pass through the high-temperature waste gas sampling pipe 4 and the waste gas transition straight pipe 3 to reach the waste gas cooling and water removal device 2. The waste gas passes through the polymer SAF fiber water-absorbing cotton 9 in the waste gas cooling and water removal device 2 for cooling, drying, and then the waste gas is inhaled into the waste gas analyzer 1 to analyze the waste gas components, and the oxygen content of the dry waste gas in the coke oven branch flue 5 is obtained.
[0024] The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the above embodiments. The methods used in the above embodiments are all conventional methods unless otherwise specified.
Claims
1. An oxygen content measuring device for the waste gas in the coke oven's branch flue, characterized in that, It includes an exhaust gas analyzer, an exhaust gas sampling pipe, an exhaust gas transition straight pipe, and an exhaust gas cooling and water removal device. The sampling end of the exhaust gas sampling pipe is inserted into the sub-flue. One end of the exhaust gas sampling pipe opposite to the sampling end is connected to the exhaust gas transition straight pipe. The other end of the exhaust gas transition straight pipe is connected to the exhaust gas cooling and water removal device. The other end of the exhaust gas cooling and water removal device is connected to the exhaust gas analyzer. The exhaust gas analyzer is connected to an external power supply.
2. The oxygen content measuring device for the waste gas in the coke oven's divided flue according to claim 1, characterized in that, A self-priming pump is provided at the top of the exhaust gas analyzer. A hole matching the exhaust gas cooling and water removal device is provided at the bottom, and internal threads matching the installation of the exhaust gas cooling and water removal device are provided on the inner wall of the hole.
3. The oxygen content measuring device for the waste gas in the coke oven's separate flue according to claim 1, characterized in that, The exhaust gas cooling and water removal device includes a water removal outer pipe, an expanded-diameter buffer pipe, a polymer SAF fiber water-absorbing cotton, and a connecting pipe. Connecting columns with external threads that are directly connected up and down are provided at both the upper and lower parts of the water removal outer pipe. The external threads of the upper connecting column match the exhaust gas analyzer. The external threads of the lower connecting column match the exhaust gas transition straight pipe. The expanded-diameter buffer pipe is arranged at the bottom end inside the water removal outer pipe, and the bottom of the expanded-diameter buffer pipe is connected to the connecting column. The connecting pipe is arranged at the top end inside the water removal outer pipe and is connected to the upper connecting column. The polymer SAF fiber water-absorbing cotton is arranged between the connecting pipe and the inner wall of the water removal outer pipe.
4. The oxygen content measuring device for the waste gas in the coke oven's separate flue according to claim 3, characterized in that, The bottom of the expanded-diameter buffer pipe is connected to the lower connecting column of the water removal outer pipe, and the upper diameter of the expanded-diameter buffer pipe is the same as the inner diameter of the water removal outer pipe.
5. The oxygen content measuring device for the waste gas in the coke oven's divided flue according to claim 3, characterized in that, A baffle is further provided between the connecting pipe and the inner wall of the water removal outer pipe, and the polymer SAF fiber water-absorbing cotton is arranged on the baffle between the connecting pipe and the inner wall of the water removal outer pipe.
6. The oxygen content measuring device for the waste gas in the coke oven's divided flue according to claim 1, wherein, The length of the exhaust gas sampling pipe is 1.5 m to 2 m, and the length of the exhaust gas transition straight pipe is 0.5 m to 0.7 m.