Online raw gas flowmeter system
The online crude coal flow velocity meter system utilizes multiple sensors and a computer to monitor the flow velocity in real time, solving the problem of easy damage to flow meters in existing technologies and achieving long equipment life and stable production.
Patent Information
- Application Number
- CN202520326531.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing crude gas flow rate meters are easily affected by coal gas in coal-water slurry gasification processes, have short service life, and lead to frequent shutdowns for replacement, increasing costs and hindering production.
Design an online crude coal flow velocity meter system that connects to a computer via multiple pressure gauges, thermometers, and flow meters to calculate flow velocity in real time, set alarms, monitor changes in pipeline inner diameter and flow velocity, and reduce downtime for maintenance.
It enables real-time measurement of crude coal gas flow velocity, reduces wear and corrosion on equipment, extends equipment service life, reduces downtime maintenance frequency, and ensures production continuity.
Smart Images
Figure CN223624250U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of coal gasification technology, and more specifically, relates to an online crude coal gas flow rate meter system. Background Technology
[0002] In the coal-water slurry gasification process, coal slurry and oxygen are injected into the gasifier through specialized burners. An incomplete oxidation reaction occurs at 1300-1500℃ and 6.5MPa, producing crude coal gas primarily composed of hydrogen and carbon monoxide. This crude coal gas is then directly contacted with quench water and rapidly cooled in a quench chamber at the bottom of the gasifier, reducing its temperature to approximately 250℃. Molten ash entrained in the crude coal gas solidifies after quenching and is discharged with the water. The cooled crude coal gas then enters a cyclone separator and a scrubbing tower to remove solid particles, dust, and other impurities, purifying the gas.
[0003] Before purification by the cyclone separator and scrubbing tower, the raw coal gas contains a significant amount of water vapor, ash, and solid particles. Therefore, scaling easily occurs in the raw coal gas transmission pipeline from the gasifier to the cyclone separator, especially at bends, due to the accumulation of ash and solid particles. This scaling reduces the cross-sectional area through which gas can pass, leading to increased gas velocity within the pipeline, exacerbating erosion and corrosion, and reducing the pipeline's service life.
[0004] Therefore, the flow velocity in the pipeline is of great significance for preventing elbow wear. The existing method is to measure it with a flow meter. However, the flow meter is easily affected by crude gas, has a short service life, requires frequent replacement, resulting in high costs, and requires shutdown for replacement, which is not conducive to production. Utility Model Content
[0005] To address the shortcomings of the prior art, the purpose of this application is to provide an online crude coal gas flow rate meter system.
[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide an online crude coal gas flow rate meter system, including: a gasifier, a cyclone separator and a scrubbing tower, wherein a first pipe is provided between the gasifier and the cyclone separator, a second pipe is provided between the cyclone separator and the scrubbing tower, and a third pipe is provided at the top of the scrubbing tower, wherein the first pipe is provided with a first pressure gauge and a first thermometer, and the third pipe is provided with a flow meter, a second pressure gauge and a second thermometer.
[0007] In one embodiment, the online crude coal flow rate meter system further includes a computer, which is electrically connected to the first pressure gauge, the first thermometer, the flow meter, the second pressure gauge, and the second thermometer.
[0008] In one embodiment, a third pressure gauge is also provided on the first pipeline. The first pressure gauge is located near the outlet of the gasifier, and the third pressure gauge is located near the inlet of the cyclone separator. The third pressure gauge is electrically connected to the computer.
[0009] In one embodiment, the online crude gas flow rate meter system also includes an alarm electrically connected to a computer.
[0010] In one embodiment, the alarm value of the alarm device is the pressure difference between the first pressure gauge and the third pressure gauge ≥ 50 kPa.
[0011] In one embodiment, the danger alarm value of the alarm is ≥80 kPa, which is the pressure difference between the first pressure gauge and the third pressure gauge.
[0012] The advantages of the online crude gas flow rate meter system provided in this application are as follows: the crude gas flow rate in the first pipeline can be calculated according to the corresponding formulas using the first pressure gauge, the first thermometer, the flow meter, the second pressure gauge, and the second thermometer, thus realizing real-time measurement of the crude gas; moreover, the crude gas has little impact on the first pressure gauge, the first thermometer, the flow meter, the second pressure gauge, and the second thermometer, effectively reducing the frequency of downtime maintenance and ensuring normal production. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the exploded structure of the online crude coal gas flow velocity meter system provided in the embodiments of this application.
[0015] The following are the labeling elements in the figure:
[0016] 1. Gasifier; 11. Quenching chamber; 2. Cyclone separator; 3. Scrubber; 4. First pipeline; 41. First pressure gauge; 42. First thermometer; 43. Third pressure gauge; 5. Second pipeline; 6. Third pipeline; 61. Flow meter; 62. Second pressure gauge; 63. Second thermometer. Detailed Implementation
[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0021] like Figure 1 As shown, an online crude gas flow rate meter system provided in this application embodiment will now be described. This online crude gas flow rate meter system includes: a gasifier 1, a cyclone separator 2, and a scrubbing tower 3. A first pipe 4 is provided between the gasifier 1 and the cyclone separator 2, a second pipe 5 is provided between the cyclone separator 2 and the scrubbing tower 3, and a third pipe 6 is provided at the top of the scrubbing tower 3. The first pipe 4 is equipped with a first pressure gauge 41 and a first thermometer 42, and the third pipe 6 is equipped with a flow meter 61, a second pressure gauge 62, and a second thermometer 63. Since the crude gas is purified by the scrubbing tower 3 and will not damage the flow meter 61, the flow meter 61 can be installed on the third pipe 6.
[0022] Specifically, the online crude coal gas flow rate meter system also includes a computer, which is electrically connected to a first pressure gauge 41, a first thermometer 42, a flow meter 61, a second pressure gauge 62, and a second thermometer 63. The computer collects data, integrates the data according to a built-in program, and calculates the crude coal gas flow rate online. For safety, a third pressure gauge 43 is also installed on the first pipeline 4. The first pressure gauge 41 is located near the outlet of the gasifier 1, and the third pressure gauge 43 is located near the inlet of the cyclone separator 2. The third pressure gauge 43 is electrically connected to the computer. The pressure difference between the third pressure gauge 43 and the first pressure gauge 41 can reflect the change in the inner diameter of the first pipeline 4.
[0023] In this embodiment, the online crude gas flow rate meter system also includes an alarm electrically connected to a computer. The alarm is used to alert personnel and prompt them to pay attention to the condition of the first pipeline 4. Specifically, the alarm's alert value is a pressure difference between the first pressure gauge 41 and the third pressure gauge 43 ≥ 50 kPa. That is, when the pressure difference is ≥ 50 kPa, the alarm will sound an alert to remind personnel to pay attention and monitor the pressure difference trend. If the pressure difference is ≥ 80 kPa, the alarm will sound a danger alarm, requiring immediate action, such as stopping the system for maintenance.
[0024] In this embodiment, the water content in the crude gas at the outlet of the scrubbing tower can be calculated using a second pressure gauge and a second thermometer installed on the third pipeline, as shown in formula (1) below:
[0025] (1)
[0026] In the formula, P2 is the value of the second pressure gauge, in MPa; T2 is the value of the second thermometer, in °C.
[0027] Similarly, the water content Y in the crude gas at the gasifier outlet can be calculated using the first pressure gauge and the first thermometer installed on the first pipeline, as shown in formula (2) below.
[0028] (2)
[0029] In the formula, P1 is the value of the first pressure gauge in MPa, and T1 is the value of the second thermometer in °C.
[0030] By combining equations (1) and (2) with the flow meter on the third pipeline, the standard volumetric flow rate F of the crude gas at the gasifier outlet can be calculated, and formula (3) is as follows:
[0031] (3)
[0032] In the formula, Q represents the value of the flow meter, with the unit being Nm³. 3 / h.
[0033] The first and third pressure gauges installed on the first pipeline can measure the pressure drop generated by the crude gas passing through the first pipeline. According to the Hagen-Poiseuille law, the inner diameter D of the pipeline after scaling can be calculated, as shown in formula (4).
[0034] (4)
[0035] (4) In the formula Where L is the dynamic viscosity of the fluid, P3 is the pipe length, and P3 is the value of the third pressure gauge. Substituting equations (3) and (4) into the calculation formula, the crude coal gas flow velocity U can be obtained, as shown in equation (5) below:
[0036] (5)
[0037] Due to discrepancies between the conversion of real and ideal gases, under a gasification condition of 6.5 MPa, the conversion deviation from the actual flow rate is approximately 0.917. The final corrected formula (6) is:
[0038] (6)
[0039] By inputting the above formula into the computer, online detection of the crude coal gas flow velocity can be achieved. In this embodiment, a flow velocity alarm value can also be set based on the calculated flow velocity. When the flow velocity is 30 m / s, the alarm will sound; when the flow velocity is 40 m / s, a danger alarm will be issued, and personnel will immediately take action.
[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An online crude coal gas flow rate meter system, comprising: A gasifier (1), a cyclone separator (2), and a scrubbing tower (3) are provided. A first pipe (4) is provided between the gasifier (1) and the cyclone separator (2), a second pipe (5) is provided between the cyclone separator (2) and the scrubbing tower (3), and a third pipe (6) is provided at the top of the scrubbing tower (3). The first pipe (4) is provided with a first pressure gauge (41) and a first thermometer (42), and the third pipe (6) is provided with a flow meter (61), a second pressure gauge (62), and a second thermometer (63).
2. The online crude coal gas flow rate meter system as described in claim 1, characterized in that: It also includes a computer, which is electrically connected to the first pressure gauge (41), the first thermometer (42), the flow meter (61), the second pressure gauge (62), and the second thermometer (63).
3. The online crude coal gas flow rate meter system as described in claim 2, characterized in that: The first pipe (4) is also equipped with a third pressure gauge (43). The first pressure gauge (41) is located near the outlet of the gasifier (1), and the third pressure gauge (43) is located near the inlet of the cyclone separator (2). The third pressure gauge (43) is electrically connected to the computer.
4. The online crude coal gas flow rate meter system as described in claim 3, characterized in that: It also includes an alarm that is electrically connected to the computer.
5. The online crude coal gas flow rate meter system as described in claim 4, characterized in that: The alarm value of the alarm device is the pressure difference between the first pressure gauge (41) and the third pressure gauge (43) ≥ 50 kPa.
6. The online crude coal gas flow rate meter system as described in claim 5, characterized in that: The alarm value of the alarm is the pressure difference between the first pressure gauge (41) and the third pressure gauge (43) ≥ 80 kPa.