An on-line coal gasification composition monitoring system

Abstract

This utility model discloses an online coal gasification composition monitoring system, relating to the field of gas detection technology. It includes a condenser, a water collection tank, and a filter tank connected sequentially via a gas transmission pipeline. The exhaust end of the filter tank is connected to a detection pipeline and a diversion pipeline via a T-junction. A sampling pump, an oil-water filter, and a detection module are connected in series on the detection pipeline. A diversion pump is connected to the diversion pipeline. Flow meters are installed at the inlet ends of both the sampling pump and the diversion pump. This online coal gasification composition monitoring system first cools and filters the gas to be tested, then extracts a portion of the treated gas and sends it to the detection module for detection, thereby ensuring the accuracy of the detection.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically to an online coal gasification composition monitoring system. Background Technology

[0002] In coal chemical production, coal gas is an inevitable byproduct. Coal gas contains toxic gases, and accidents can occur when the concentration of these toxic gases in a coal chemical plant reaches or exceeds safe levels. Real-time, continuous, and simultaneous measurement of the calorific value of coal gas and biogas, as well as the concentrations of CO, CO2, CH4, H2, O2, and C... n H m Calculation of volume concentration and calorific value of multi-component gases; beneficial for improving gas utilization efficiency, saving energy and reducing consumption, and ensuring safe production in industrial sites.

[0003] Due to its high-temperature characteristics and the presence of dust and aerosol components, direct detection of coal gas can easily lead to sensor measurement errors. Therefore, it requires pretreatment through cooling, dust removal, and dehumidification. This process necessitates a high-flow-rate air pump to balance the system pressure difference. However, the actual flow rate required by the detection module is only 15-30% of the total air pump flow rate. Excessive supply will cause turbulence in the detection chamber, resulting in signal distortion.

[0004] Therefore, it is necessary to propose an online coal gasification composition monitoring system to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide an online coal gasification composition monitoring system to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: an online coal gasification composition monitoring system, comprising a condenser, a water collection tank, and a filter tank connected in sequence via a gas transmission pipeline. The exhaust end of the filter tank is connected to a detection pipeline and a diversion pipeline via a three-way pipe. A sampling pump, an oil-water filter, and a detection module are connected in series on the detection pipeline. A diversion pump is connected to the diversion pipeline. Flow meters are installed at the inlet ends of both the sampling pump and the diversion pump.

[0009] Preferably, there are multiple filter canisters connected in parallel.

[0010] Preferably, the outlet end of the condenser is connected to a temperature sensor for detecting the outlet temperature.

[0011] Preferably, the water collection tank is connected to a drain pipe, and the drain pipe is equipped with a drain valve.

[0012] Preferably, the air inlet of the detection pipeline is connected to a calibration tube via a three-way valve, the three-way valve being used to control the detection pipeline to selectively connect to the gas supply pipeline or the calibration tube.

[0013] Preferably, a heat tracing pipe is provided on the outside of the detection pipeline.

[0014] Preferably, the detection module is equipped with multiple gas detection sensors, which are connected in series or in parallel on the detection pipeline.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides an online coal gasification composition monitoring system, which has the following beneficial effects:

[0017] 1. This online coal gasification composition monitoring system ensures that the system pressure difference is sufficient to overcome the flow resistance of the filter tank by setting up a sampling pump and a diversion pump. At the same time, by controlling the speed of the sampling pump and the diversion pump, the flow rate of the gas to be tested entering the detection pipeline is controlled to ensure that the amount of gas to be tested entering the detection module meets the detection requirements.

[0018] 2. This online coal gasification composition monitoring system, by setting up oil-water filters, condensers and filter tanks, performs multi-stage treatment and filtration of the gas to be tested, effectively removing impurities and water vapor, and improving the service life of the product.

[0019] 3. This online coal gasification composition monitoring system uses a condenser to cool and dehumidify the gas to be tested, making it suitable for high-temperature and high-humidity testing. At the same time, the system uses a heat tracing pipe to heat and keep the gas to be tested, which can prevent the liquefaction of the components to be tested and ensure the accuracy of the test. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a flowchart illustrating the present invention.

[0022] In the diagram: 1. Oil-water filter; 2. Sampling pump; 3. Diverter pump; 4. Electric valve; 5. Temperature sensor; 6. Condenser; 7. Drain valve; 8. Detection module; 9. Flow meter; 10. Filter tank; 11. Water collection tank; 12. Three-way valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-2As shown, an online coal gasification composition monitoring system includes a condenser 6, a water collection tank 11, and a filter tank 10 connected in sequence via a gas transmission pipeline. The exhaust end of the filter tank 10 is connected to a detection pipeline and a diversion pipeline via a three-way pipe. A sampling pump 2, an oil-water filter 1, and a detection module 8 are connected in series on the detection pipeline. A diversion pump 3 is connected to the diversion pipeline. Flow meters 9 are installed at the inlet ends of both the sampling pump 2 and the diversion pump 3.

[0025] When detecting the composition of coal gasification, sampling pump 2 and diversion pump 3 are started to pump the gas to be tested to the detection system. The gas is cooled by condenser 6 to condense the vapor. When the gas to be tested passes through water collection tank 11, the condensate in the gas pipeline is collected to avoid affecting the gas delivery. Then the gas to be tested is filtered through filter tank 10. After filtration, part of the gas is transported through the detection pipeline to oil-water filter 1 for further filtration. After processing, it is sent to detection module 8 to detect its composition. The other part of the excess gas is discharged through diversion pipeline.

[0026] By setting up sampling pump 2 and diversion pump 3, the system pressure difference is ensured to be sufficient to overcome the flow resistance of filter tank 10. Simultaneously, by controlling the rotational speeds of sampling pump 2 and diversion pump 3, the flow rate of the gas to be tested entering the detection pipeline is controlled, ensuring that the amount of gas to be tested entering detection module 8 meets the detection requirements. A condenser 6 is installed to cool the gas to be tested, making it suitable for high-temperature and high-humidity gas detection.

[0027] An electric valve 4 is installed on the gas pipeline to control the flow of the gas to be tested.

[0028] To reduce filtration resistance, there are multiple filter canisters 10, which are connected in parallel.

[0029] In some embodiments, it is necessary to control the temperature of the gas to be tested within a preset range to prevent the components to be tested from liquefying and affecting the accuracy of the detection. A temperature sensor 5 for detecting the outlet temperature is connected to the outlet end of the condenser 6. With the cooperation of the temperature sensor 5, the power of the condenser 6 is adjusted to keep the outlet temperature within the preset range.

[0030] To prevent some of the components being tested from liquefying during transport, a heat tracing pipe is installed on the outside of the testing pipeline. Specifically, for example, when the gas being tested contains gaseous benzene, the temperature of the gas needs to be maintained at around 100°C via the heat tracing pipe to prevent benzene liquefaction from affecting the accuracy of the test.

[0031] Specifically, a drain pipe is connected to the water collection tank 11, and a drain valve 7 is installed on the drain pipe.

[0032] In some embodiments, the inlet end of the detection pipeline is connected to a calibration tube via a three-way valve 12. The three-way valve 12 is used to control the detection pipeline to selectively connect with either the gas supply pipeline or the calibration tube. When the detection module 8 needs to be calibrated, the detection pipeline is connected to the calibration tube via the three-way valve 12, and calibration gas is introduced into the detection pipeline to calibrate the detection module 8.

[0033] Specifically, the detection module 8 is equipped with multiple gas detection sensors, which are connected in series or parallel on the detection pipeline. By using multiple gas detection sensors, it can simultaneously detect multiple components.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An on-line coal gasification constituent monitoring system characterized by: It includes a condenser (6), a water collection tank (11) and a filter tank (10) connected in sequence through a gas pipeline. The exhaust end of the filter tank (10) is connected to a detection pipeline and a diversion pipeline through a three-way pipe. The detection pipeline is connected in series with a sampling pump (2), an oil-water filter (1) and a detection module (8). The diversion pipeline is connected with a diversion pump (3). The inlet end of both the sampling pump (2) and the diversion pump (3) is equipped with a flow meter (9).

2. The online coal gasification composition monitoring system according to claim 1, characterized in that: There are multiple filter canisters (10), and the multiple filter canisters (10) are connected in parallel.

3. An on-line coal gasification constituent monitoring system according to claim 1, characterized in that: The outlet end of the condenser (6) is connected to a temperature sensor (5) for detecting the outlet temperature.

4. An on-line coal gasification constituent monitoring system according to claim 1, characterized by: The water collection tank (11) is connected to a drain pipe, and the drain pipe is equipped with a drain valve (7).

5. An on-line coal gasification constituent monitoring system according to claim 1, characterized by: The inlet of the detection pipeline is connected to a calibration tube via a three-way valve (12). The three-way valve (12) is used to control the detection pipeline to selectively connect to the gas supply pipeline or the calibration tube.

6. An on-line coal gasification constituent monitoring system according to claim 1, characterized by: A heat tracing pipe is installed on the outside of the detection pipeline.

7. The online coal gasification composition monitoring system according to claim 1, characterized in that: The detection module (8) is equipped with a variety of gas detection sensors, which are connected in series or in parallel on the detection pipeline.

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