Accurate pulverized coal flow calibration system of coal gasification device
The coal powder flow measurement system addresses inaccuracies in existing systems by using dual flow meters and pressure compensators to ensure consistent coal powder flow, improving gasification reactor stability and reducing energy use.
Patent Information
- Application Number
- CN202422377904.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing coal powder conveying and weighing systems have errors in calibrating coal powder flow metering, which affects the stable operation of the gasifier and the efficient utilization of coal.
By introducing normal pressure chambers, lock buckets, high-pressure feeding tanks, pipelines, flowmeters A, calibration branch pipes, calibration main pipes, flowmeters B, pressure compensators, pressure regulating valves and high-pressure nitrogen pipelines into the coal powder conveying system, multiple pipelines are calibrated by using flowmeters B to eliminate errors and ensure the consistency of coal powder flow.
It realizes accurate measurement of coal powder flow, improves the operating stability of the gasifier and reduces energy consumption, ensures the uniformity of the temperature field distribution of the multi-burner gasifier and improves the carbon conversion rate.
Smart Images
Figure CN223107041U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal chemical industry, and specifically relates to a system for accurately calibrating the pulverized coal flow rate of a coal gasification device, and also relates to a calibration method for this system. Background Technique
[0002] With the increasing energy shortage, the development of coal chemical industry is of great significance to the adjustment of the energy structure. The coal gasification furnace is the core equipment for the production of coal chemical products. The efficient and clean utilization of coal is the key development direction of coal chemical industry, and the coal gasification furnace is increasingly developing towards multi-nozzle large-scale. In the existing pulverized coal conveying and weighing system, the calibration of the pulverized coal flowmeter depends on the on-line weighing of the feeding tank. Due to the influence of factors such as the pressure change of the high-pressure pulverized coal feeding tank, the change of the pulverized coal lock hopper level, and the expansion joint tension between the pulverized coal lock hopper and the pulverized coal feeding tank, it leads to errors in the feeding tank weighing when calibrating different pulverized coal flowmeters, affecting the stable operation of the gasification furnace and the efficient utilization of coal. Summary of the Invention
[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a system for accurately calibrating the pulverized coal flow rate of a coal gasification device and its calibration method, which can accurately measure the pulverized coal, is beneficial to the stable operation of the gasification furnace, reduces energy consumption, and saves energy.
[0004] The purpose of the utility model and the solution to its main technical problems are achieved by adopting the following technical solutions:
[0005] A system for accurately calibrating the pulverized coal flow rate of a coal gasification device of the utility model includes an atmospheric pressure bin, a lock hopper, a high-pressure feeding tank, pipelines, flowmeter A, a calibration branch pipe, a calibration main pipe, flowmeter B, a pressure compensator, a high-pressure nitrogen pipeline, a pressure regulating valve, and a pressure reducer. Its characteristics are as follows: the atmospheric pressure bin is respectively connected to the lock hopper and the pressure reducer through pipelines, the lock hopper is connected to the high-pressure feeding tank through a pipeline, the high-pressure feeding tank is connected to the pipeline, flowmeter A is installed on the pipeline, the pipeline is connected to the calibration branch pipe, the calibration branch pipe is connected to the calibration main pipe, flowmeter B is installed on the calibration main pipe, the calibration main pipe is connected to the pressure compensator, the pressure compensator is respectively connected to the pressure regulating valve and the pressure reducer, and the pressure regulating valve is connected to the high-pressure nitrogen pipeline.
[0006] The pipeline is connected to the gasification furnace.
[0007] The lock hopper is a converter that converts low-pressure pulverized coal into high-pressure pulverized coal.
[0008] There are 1 - N pipelines and calibration branch pipes.
[0009] Compared with the prior art, the utility model has obvious beneficial effects. From the above technical solutions, it can be seen that: by connecting a lock hopper and a pressure reducer to an atmospheric pressure bin through pipelines respectively, and connecting the lock hopper to a high-pressure feeding tank through a pipeline. In the coal chemical industry, the lock hopper is a converter that converts low-pressure pulverized coal into high-pressure pulverized coal, which is the prior art. The high-pressure feeding tank is connected to a pipeline, and a flowmeter A is installed on the pipeline. The pipeline is connected to a calibration branch pipe, the calibration branch pipe is connected to a calibration main pipe, a flowmeter B is installed on the calibration main pipe, the calibration main pipe is connected to a pressure compensator, the pressure compensator is respectively connected to a pressure regulating valve and a pressure reducer, and the pressure regulating valve is connected to a high-pressure nitrogen pipeline. By setting a flowmeter B of the same model as the flowmeter A on the calibration main pipe as the pulverized coal standard flowmeter, all the flowmeters A of the pipelines entering the gasifier are calibrated. The error brought by inconsistent calibration benchmarks of pulverized coal is eliminated, the accurate consistency of all pulverized coal flows on multiple pipelines is ensured, and uneven burning caused by different oxygen-coal ratios in a multi-burner gasifier is prevented; the temperature field distribution of the multi-burner gasifier is more uniform, the carbon conversion rate is increased, the operation stability is improved, and the consumption per unit product is reduced. Precise metering of pulverized coal is achieved, which is beneficial to the stable operation of the gasifier, reduces energy consumption, and saves energy. Description of the Drawings
[0010] Figure 1 is the flow chart of the utility model;
[0011] Figure 2 is the structural schematic diagram of the utility model.
[0012] Reference Signs in the Drawings
[0013] 1. Atmospheric pressure bin, 2. Lock hopper, 3. High-pressure feeding tank, 4. Pipeline, 5. Flowmeter A, 6. Gasifier, 7. Calibration branch pipe, 8. Calibration main pipe, 9. Flowmeter B, 10. Pressure compensator, 11. High-pressure nitrogen pipeline, 12. Pressure regulating valve, 13. Pressure reducer. Detailed Embodiments
[0014] The following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present utility model as follows.
[0015] Embodiment 1
[0016] The utility model discloses a coal gasification device accurately calibrating coal powder flow system, comprising a normal pressure bin 1, a lock bucket 2, a high pressure feeding tank 3, a pipeline 4, a flow meter A5, a calibration branch pipe 7, a calibration main pipe 8, a flow meter B9, a pressure compensator 10, a high pressure nitrogen pipeline 11, a pressure regulating valve 12, and a pressure reducer 13, characterized in that: the normal pressure bin 1 is connected to the lock bucket 2 and the pressure reducer 13 through pipelines respectively, the lock bucket 2 is connected to the high pressure feeding tank 3 through a pipeline, the high pressure feeding tank 3 is connected to the pipeline 4, the pipeline 4 is equipped with a flow meter A5, the pipeline 4 is connected to the calibration branch pipe 7, the calibration branch pipe 7 is connected to the calibration main pipe 8, the calibration main pipe 8 is equipped with a flow meter B9, the calibration main pipe 8 is connected to the pressure compensator 10, the pressure compensator 10 is connected to the pressure regulating valve 12 and the pressure reducer 13 respectively, the pressure regulating valve 12 is connected to the high pressure nitrogen pipeline 11, the pipeline 4 is connected to the gasifier 6, and the lock bucket 2 is a converter for converting low pressure coal powder into high pressure coal powder.
[0017] When in use, the gasifier 6 operates normally, and the prepared qualified dry coal powder is stored in the atmospheric pressure coal powder bin 1. The coal powder in the atmospheric pressure coal powder bin 1 flows from the coal powder lock hopper 2 by gravity. After the pressurization equipment in the lock hopper 2 is pressurized, the coal powder is transported to the high-pressure feeding tank 3 with carrier gas CO2. After the coal powder is pressurized, it is continuously transported to the gasifier 6 through the pipeline 4. The pipeline 4 is provided with a flow meter A5 to measure the coal powder entering the gasifier 6. When the coal powder flow meter is calibrated, the coal powder flow of a pipeline 4 The amount is fed into the calibration main pipe 8 through the calibration branch pipe 7, and the pulverized coal is calibrated and verified on the flow meter A5 of a pipeline 4 through the flow meter B9, so that the calibration of the pulverized coal is consistent with the operating conditions of the gasifier to ensure the accuracy of the pulverized coal flow. The calibration main pipe 8 is provided with a pressure compensator 10 to add carrier gas nitrogen to stabilize the pressure during calibration. The pulverized coal is circulated during the calibration process and reduced to normal pressure through the pressure reducer 13 and then enters the normal pressure bin 1, thereby completing the calibration of the pulverized coal flowmeter during the pulverized coal circulation process.
[0018] Example 2
[0019] The utility model discloses a coal gasification device accurately calibrating coal powder flow system, comprising a normal pressure bin 1, a lock bucket 2, a high pressure feeding tank 3, a pipeline 4, a flow meter A5, a gasifier 6, a calibration branch pipe 7, a calibration main pipe 8, a flow meter B9, a pressure compensator 10, a high pressure nitrogen pipeline 11, a pressure regulating valve 12, and a pressure reducer 13, characterized in that: the normal pressure bin 1 is connected to the lock bucket 2 and the pressure reducer 13 through pipelines respectively, the lock bucket 2 is connected to the high pressure feeding tank 3 through a pipeline, the high pressure feeding tank 3 is connected to the pipeline 4, the pipeline 4 is equipped with a flow meter A5, the pipeline 4 is connected to the calibration branch pipe 7, the calibration branch pipe 7 is connected to the calibration main pipe 8, the calibration main pipe 8 is equipped with a flow meter B9, the calibration main pipe 8 is connected to the pressure compensator 10, the pressure compensator 10 is connected to the pressure regulating valve 12 and the pressure reducer 13 respectively, the pressure regulating valve 12 is connected to the high pressure nitrogen pipeline 11, the pipeline 4 is connected to the gasifier 6, and the lock bucket 2 is a converter for converting low pressure coal powder into high pressure coal powder.
[0020] During use; refer to Figure 1-2 , the gasifier 6 operates normally, and qualified dry pulverized coal is prepared and stored in the atmospheric-pressure pulverized coal bin 1. The pulverized coal in the atmospheric-pressure pulverized coal bin 1 flows by gravity through the pulverized coal lock hopper 2. After being pressurized by the built-in pressurizing equipment in the lock hopper 2, the pulverized coal is transported to the high-pressure feeding tank 3 with the carrier gas CO2. After being pressurized, the pulverized coal is continuously transported to the gasifier 6 through the pipeline 4. A flowmeter A5 is provided on the pipeline 4 to measure the pulverized coal entering the gasifier 6. When calibrating the pulverized coal flowmeter, the pulverized coal flow of the first pipeline 4 feeds into the calibration main pipe 8 through the calibration branch pipe 7. The pulverized coal calibrates and rechecks the flowmeter A5 of the first pipeline 4 through the flowmeter B9, and sequentially calibrates and rechecks the flowmeter A5 of the other 3 pipelines 4 respectively, so that the pulverized coal calibration is consistent with the operating conditions of the coal gasifier to ensure the accuracy of the pulverized coal flow. The calibration main pipe 8 is provided with a pressure compensator 10 to add the carrier gas nitrogen to stabilize the pressure during calibration, and the pulverized coal circulates during the calibration process and enters the atmospheric-pressure bin 1 after being reduced to atmospheric pressure through the pressure reducer 13, completing the calibration of the pulverized coal flowmeter during the pulverized coal circulation process.
[0021] Embodiment 3
[0022] A precise calibration system for the pulverized coal flow of a coal gasification device of the present utility model includes an atmospheric-pressure bin 1, a lock hopper 2, a high-pressure feeding tank 3, a pipeline 4, a flowmeter A5, a gasifier 6, a calibration branch pipe 7, a calibration main pipe 8, a flowmeter B9, a pressure compensator 10, a high-pressure nitrogen pipeline 11, a pressure regulating valve 12, and a pressure reducer 13, and is characterized in that; the atmospheric-pressure bin 1 is respectively connected to the lock hopper 2 and the pressure reducer 13 through pipelines, the connection to the lock hopper 2 is connected to the high-pressure feeding tank 3 through a pipeline, the high-pressure feeding tank 3 is connected to the pipeline 4, the flowmeter A5 is installed on the pipeline 4, the pipeline 4 is connected to the calibration branch pipe 7, the calibration branch pipe 7 is connected to the calibration main pipe 8, the flowmeter B9 is installed on the calibration main pipe 8, the calibration main pipe 8 is connected to the pressure compensator 10, the pressure compensator 10 is respectively connected to the pressure regulating valve 12 and the pressure reducer 13, the pressure regulating valve 12 is connected to the high-pressure nitrogen pipeline 11, the pipeline 4 is connected to the gasifier 6, and the lock hopper 2 is a converter that turns low-pressure pulverized coal into high-pressure pulverized coal.
[0023] During operation, the gasifier 6 operates normally, and qualified dry pulverized coal is prepared and stored in the atmospheric pressure pulverized coal bin 1. The pulverized coal in the atmospheric pressure pulverized coal bin 1 flows by gravity through the pulverized coal lock hopper 2. After being pressurized by the built-in pressurization equipment in the lock hopper 2, the pulverized coal is transported to the high-pressure feeding tank 3 with carrier gas CO2. After being pressurized, the pulverized coal is continuously transported to the gasifier 6 through the pipeline 4. A flowmeter A5 is installed on the pipeline 4 to measure the pulverized coal entering the gasifier 6. When calibrating the pulverized coal flowmeter, the pulverized coal flow of the first pipeline 4 feeds into the calibration main pipe 8 through the calibration branch pipe 7. The pulverized coal calibrates and rechecks the flowmeter A5 of the first pipeline 4 through the flowmeter B9, and then calibrates and rechecks the flowmeter A5 of the other 5 pipelines 4 in turn, so that the pulverized coal calibration is consistent with the operating conditions of the coal gasifier to ensure the accuracy of the pulverized coal flow. A pressure compensator 10 is installed on the calibration main pipe 8 to add carrier gas nitrogen to stabilize the pressure during calibration. The pressure is reduced through the pressure reducer 13, and the pulverized coal circulates during calibration and then enters the atmospheric pressure bin 1 after being reduced to atmospheric pressure, completing the calibration of the pulverized coal flowmeter during the pulverized coal circulation process.
[0024] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A precise calibration system for pulverized coal flow rate in a coal gasification device, comprising an atmospheric tank (1), a lock hopper (2), a high-pressure feeding tank (3), a pipeline (4), a flowmeter A (5), a calibration branch pipe (7), a calibration main pipe (8), a flowmeter B (9), a pressure compensator (10), a high-pressure nitrogen pipeline (11), a pressure regulating valve (12), and a pressure reducer (13), characterized in that; The atmospheric pressure bin (1) is connected to the lock hopper (2) and the pressure reducer (13) through pipelines respectively. The lock hopper (2) is connected to the high-pressure feeding tank (3) through a pipeline. The high-pressure feeding tank (3) is connected to the pipeline (4). A flowmeter A (5) is installed on the pipeline (4). The pipeline (4) is connected to the calibration branch pipe (7). The calibration branch pipe (7) is connected to the calibration main pipe (8). A flowmeter B (9) is installed on the calibration main pipe (8). The calibration main pipe (8) is connected to the pressure compensator (10). The pressure compensator (10) is connected to the pressure regulating valve (12) and the pressure reducer (13) respectively. The pressure regulating valve (12) is connected to the high-pressure nitrogen pipeline (11).
2. The accurate calibration pulverized coal flow rate system of a coal gasification device according to claim 1, characterized in that; The pipeline (4) is connected to the gasifier (6).
3. The precise calibration pulverized coal flow rate system of a coal gasification device according to claim 1, characterized in that; The lock hopper (2) is a converter that converts low-pressure pulverized coal into high-pressure pulverized coal.
4. The accurate calibration pulverized coal flow rate system for a coal gasification device according to claim 1, wherein; There are 1 - N pipelines (4) and calibration branch pipes (7).