Online analysis system for oxygen content of coke oven gas
Through the combined structure of the circulating water pipe and the water tank, the blockage and rust problems caused by primary water in the oxygen content analysis cabinet are solved, and the stability and accuracy of the online oxygen content analysis system is achieved, which extends the equipment life and saves water resources and Running cost.
Patent Information
- Application Number
- CN202420575987.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-22
AI Technical Summary
The existing oxygen content analysis cabinet uses water once, resulting in complex water quality, which is prone to blockage or rust, affecting the stability of gas sample gas collection for coke ovens and the accuracy of analysis results.
Replace primary water with circulating water, and combines the structure of the circulating water pipe in the upper section of the primary cooler with high- and low-level water tanks and water storage tanks, combining pressurized pumps and needle-type valves to ensure water quality purification, avoid blockage and rust, and analyze the direct oxygen content online cabinet.
It improves the stability and accuracy of the oxygen content analysis system, extends the life of the pipeline and pump, reduces operating costs and primary water consumption, and ensures the accuracy of the analysis results.
Smart Images
Figure CN222166976U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of coking industry, and in particular to an online analysis system for the oxygen content of coke oven gas. Background Art
[0002] The coke oven gas produced by the coke oven needs to be cooled in two stages through the primary cooler. The upper stage uses circulating water and the lower stage uses cooling water. The cooled coke oven gas is passed through an electrostatic precipitator to remove the tar. The coke oven gas after electrostatic precipitator treatment is then pressurized by a fan and sent to the ammonium sulfate, debenzene and desulfurization processes. The electrostatic precipitator is installed in front of the blower. In order to ensure safe operation under negative pressure, the oxygen content in the coke oven gas is very strict. Therefore, it is necessary to equip it with an oxygen content analysis cabinet for real-time online monitoring. When the electrostatic precipitator is removing tar, it needs to be interlocked with the oxygen online analysis device. When the oxygen content in the coke oven gas reaches 1.0%, the DCS system will alarm. When the oxygen content reaches 2.0%, the electrostatic precipitator will be interlocked and shut down to ensure safety.
[0003] The sample gas of the oxygen content analysis cabinet is coke oven gas extracted by the negative pressure formed by the steam probe. The oxygen content analysis cabinet before the electrostatic capture treatment is generally placed in the on-site cabin. The oxygen content analysis cabinet extracts water through a pressure pump and sprays the sampled gas to cool it down, removing tar and naphthalene impurities in the gas to achieve accurate analysis. Existing oxygen content analysis cabinets generally use primary water, which is untreated, has complex water quality, is easy to clog or rust the pipeline, reduces the life of the pipeline or pump, affects the collection of coke oven gas samples and the stability of the entire oxygen content analysis system, and may cause deviations in the analysis results.
[0004] In view of this, the present utility model is proposed. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a new online analysis system for the oxygen content in coke oven gas, which will not block or rust the pipeline, thereby increasing the life of the pipeline or pump in the system and improving the collection stability of the coke oven gas sample and the accuracy of the analysis results.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0007] An online analysis system for oxygen content of coke oven gas, used before chemical production and electric capture, includes a circulating water pipeline, a high-level water tank, a low-level water tank, a water storage tank, a pipeline pressure pump and an online oxygen content analysis cabinet;
[0008] The circulating water pipeline is the upper circulating water pipeline of the pre-cooler and its open end is connected to the inlet of the high-level water tank, and the outlet of the high-level water tank is connected to the inlet of the low-level water tank located below; a water outlet is provided in the middle position of the low-level water tank and is connected to the water storage tank; an outlet is provided at the lower part of the water storage tank and is connected to the oxygen content online analysis cabinet through a pipeline provided with a valve and a pressure pump, and an overflow port is also provided at the upper part of the water storage tank, and the overflow port is connected to the external drainage ditch through an overflow pipe.
[0009] As one method, a needle valve is provided at the open end of the circulating water pipeline.
[0010] As a method, the top of the high-level water tank is open, an outlet is arranged in the middle, and a high-level water tank drain valve is also arranged at the bottom.
[0011] As one method, a booster pump inlet valve is provided at the inlet end of the booster pump and connected to the water storage tank via a pipeline, and a booster pump outlet valve is provided at the outlet end and connected to an oxygen content online analysis cabinet via a pipeline.
[0012] As an approach, the needle valve is a DN20 valve.
[0013] As one method, the high-level water tank is set on a platform 3m above the ground, and the outlet of the high-level water tank is connected to the low-level water tank via a pipe equipped with a DN20 valve; the low-level water tank is set on a bracket 0.5m above the ground.
[0014] The utility model has the following beneficial effects:
[0015] 1. The utility model can not only ensure the accuracy of the analysis of the oxygen content in the coke oven gas, but also ensure that the operation of the system is not affected by water quality problems.
[0016] 2. The utility model provides a novel water-using device for an online analysis cabinet of oxygen content in coke oven gas before electrocution. The device adopts the upper circulating water pipeline of the primary cooler and is used in conjunction with a needle valve. It has a simple structure and can be modified by internal personnel without entrusting an external engineering company, thus saving modification costs.
[0017] 3. The high-level water tank, low-level water tank and water storage tank involved in the utility model can be made of ￠1200 pipes, and the connecting pipes can be made of galvanized steel pipes, without the need to purchase new equipment or pipes. The utility model further buffers and precipitates impurities in the circulating water by setting high-level water tanks and low-level water tanks to ensure clean water without dirt. The entire configuration only requires internal maintenance personnel to complete, without outsourcing processing, saving costs.
[0018] 4. The utility model is convenient for water collection and has a suitable location for on-site installation, which can ensure clean water quality and accurate analysis of oxygen content, thus avoiding accidents that affect subsequent production.
[0019] 5. The utility model adopts circulating water to replace primary water, which saves the consumption of primary water and reduces the production cost of primary water. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The utility model is a partial structural schematic diagram of an online analysis system for oxygen content of coke oven gas.
[0021] Reference numerals:
[0022] 1. Circulating water pipeline; 2. Needle valve; 3. Pipeline; 4. High-level water tank; 5. High-level water tank drain valve; 6. Valve; 7. Pipeline; 8. Low-level water tank; 9. Pipeline; 10. Valve; 11. Water storage tank; 12. Overflow pipeline; 13. Booster pump inlet valve; 14. Pipeline; 15. Booster pump; 16. Booster pump outlet valve; 17. Pipeline; 18. Oxygen content online analysis cabinet; 19. Drain valve; 20. Low-level water tank drain valve. DETAILED DESCRIPTION
[0023] The technical solution of the utility model is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.
[0024] Example 1
[0025] like Figure 1 As shown, this embodiment provides an online analysis system for the oxygen content of coke oven gas, which is used for chemical production and electric capture treatment, including a circulating water pipeline 1, a high-level water tank 4, a low-level water tank 8, a water storage tank 11, a pipeline booster pump 15 and an online oxygen content analysis cabinet 18.
[0026] The circulating water pipeline 1 is the upper circulating water pipeline of the precooler, and a needle valve is provided at its open end and is connected to the inlet of the high-level water tank 4 through a pipeline, so that the circulating water is sent to the high-level water tank 4 through the pipeline.
[0027] The outlet of the high-level water tank 4 is connected to the inlet of the low-level water tank 8 located below through a pipe with a valve. Specifically, the high-level water tank 4 is set on a platform 3 meters above the ground, and the low-level water tank 8 can be placed on the ground. A high-level water tank drain valve 5 is also set at the bottom of the high-level water tank 4. The circulating water enters the high-level water tank 4 for buffering, precipitation of impurities, further purification, and then flows into the low-level water tank 8.
[0028] Before the transformation, the low-level water tank 8 received primary water that was not purified and had relatively complex water quality, which often blocked the pipes, and there was a lot of sediment in the low-level water tank 8, affecting its use. In this case, the low-level water tank 8 receives circulating water from the high-level water tank 4, and a low-level water tank drain valve 20 is set at the low point of the low-level water tank 8, which can overcome the above-mentioned shortcomings.
[0029] The low-level water tank 8 has a water outlet in the middle, and the water outlet is connected to the water storage tank 11 via a pipe 9 provided with a valve 10. When the liquid level is higher than the water outlet and the valve 10 is opened, the circulating water automatically flows to the water storage tank 11.
[0030] An outlet is provided at the bottom of the water storage tank 11 and connected to an oxygen content online analysis cabinet 18 through a pipe 17 provided with a valve and a pressure pump 15. The water storage tank 11 and the oxygen content online analysis cabinet 18 are placed in the hut together. An overflow port is provided at the top of the water storage tank 11. The overflow port is connected to an external drainage ditch through an overflow pipe. The circulating water sent from the low-level water tank 8 enters the water storage tank 11. When the liquid level of the water storage tank 11 rises to the overflow port position, it automatically overflows to the drainage ditch outside the hut.
[0031] A booster pump inlet valve 13 is provided at the inlet end of the booster pump 15 and is connected to the water storage tank 11 via a pipeline 14. A booster pump outlet valve 16 is provided at the outlet end and is connected to the oxygen content online analysis cabinet 18 via a pipeline 17. The booster pump 15 pressurizes the circulating water in the water storage tank 11 and enters the oxygen content online analysis cabinet 18 for spraying and flushing impurities such as tar and naphthalene in the coke oven gas, while cooling and reducing the temperature of the coke oven gas.
[0032] The oxygen content online analysis cabinet 18 receives the coke oven gas sent by steam sampling, and uses the circulating water pressurized by the pressure pump 15 to flush and spray the coke oven gas, and then collects and analyzes the processed coke oven gas sample gas to determine the oxygen content in the coke oven gas, and uploads the collected data to the chemical production DCS operating system. The chemical production DCS operating system monitors the changes in oxygen content in real time, and sets the interlocking logic between oxygen content and electric capture. When the oxygen content is ≥1%, an alarm is issued, and when it is ≥2%, the electric capture is shut down, which plays a role in protecting the electric tar collector and preventing accidents.
[0033] The utility model can ensure stable water use of the oxygen content online analysis cabinet 18 and uses clean circulating water with precipitation, so that the detection data is more accurate and scientific.
[0034] It should be pointed out that the above embodiments are only for illustrating the technical concept and features of the utility model, and the upper and lower parts described therein correspond to the drawings of the utility model, and are not used to limit specific contents. The purpose is to enable people familiar with this technology to understand the contents of the utility model and implement them accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. An online analysis system for oxygen content of coke oven gas, used before chemical production and electric capture, including a circulating water pipeline, a high-level water tank, a low-level water tank, a water storage tank, a pipeline booster pump and an online oxygen content analysis cabinet; The circulating water pipeline is the upper circulating water pipeline of the pre-cooler and its open end is connected to the inlet of the high-level water tank, and the outlet of the high-level water tank is connected to the inlet of the low-level water tank located below; a water outlet is provided in the middle position of the low-level water tank and is connected to the water storage tank; an outlet is provided at the lower part of the water storage tank and is connected to the oxygen content online analysis cabinet through a pipeline provided with a valve and a pressure pump, and an overflow port is also provided at the upper part of the water storage tank, and the overflow port is connected to the external drainage ditch through an overflow pipe.
2. The on-line analysis system for oxygen content of coke oven gas according to claim 1, characterized in that: A needle valve is arranged at the open end of the circulating water pipeline.
3. The on-line analysis system for oxygen content of coke oven gas according to claim 1, characterized in that: The top of the high-level water tank is open, an outlet is arranged in the middle, and a high-level water tank drain valve is also arranged at the bottom.
4. The on-line analysis system for oxygen content of coke oven gas according to claim 1, characterized in that: The inlet end of the booster pump is provided with a booster pump inlet valve and is connected to the water storage tank via a pipeline, and the outlet end is provided with a booster pump outlet valve and is connected to the oxygen content online analysis cabinet via a pipeline.
5. The on-line analysis system for oxygen content of coke oven gas according to claim 2, characterized in that: The needle valve is a DN20 valve.
6. The on-line analysis system for oxygen content of coke oven gas according to claim 3, characterized in that: The high-level water tank is arranged on a platform 3m above the ground, and the outlet of the high-level water tank is connected to the low-level water tank via a pipeline equipped with a DN20 valve; the low-level water tank is arranged on a bracket 0.5m above the ground.