Pretreatment device capable of avoiding blockage for online spectrum analyzer of coal gasification device

Abstract

The utility model relates to the technical field of online analyzers of coal gasification devices, in particular to a pretreatment device of an online spectrum analyzer of a coal gasification device, which is capable of avoiding blockage. Through the arrangement of the filtering mechanism, the cooling mechanism, the pressure reduction mechanism and the separation mechanism, sample gas with a large amount of dust, a large amount of water and high temperature can be effectively pretreated, impurities such as moisture and dust are prevented from entering a detection unit to pollute a detector and even damage the detection unit, and the sample gas is ensured to be stably suitable for detection of a spectrum analyzer; in addition, by arranging the steam back-blowing system, the problem that a sampling pipeline and a sampling probe are blocked can be avoided, and it is ensured that the spectrum analyzer can normally and continuously conduct sample gas sampling work.

Description

Technical Field

[0001] This utility model relates to the technical field of online analyzers for coal gasification devices, and in particular to a pretreatment device for an online spectrometer analyzer for coal gasification devices that avoids clogging. Background Technology

[0002] With the rapid development of modern science and technology and information technology, online analytical instruments are rapidly replacing traditional analytical instruments and are widely used in many production fields, including petrochemical production.

[0003] Under coal gasification production conditions, the complex and harsh operating conditions of the analytical gas source in coal gasification units lead to bottlenecks in the application of online analytical instrument systems. The high dust content and large amount of water vapor in the sample gas from coal gasification analysis often cause blockages in sampling pipelines and probes, preventing normal and continuous sample collection. Furthermore, inadequate pretreatment results in moisture, dust, and other impurities entering the detection unit, contaminating the detector and even damaging parts of it.

[0004] Existing pretreatment devices for online spectrometers in coal gasification plants, such as the multi-path pretreatment system for coal gasification furnace analyzers disclosed in utility model patent application number 202220845338.7, work by extracting sample gas from the gas flow path, pretreating it, and then delivering it to the analyzer, thus ensuring the purity of the sample gas analyzed by the gas analyzer. However, such patents cannot prevent blockages in system pipelines and probes, nor can they effectively clear blockages after they occur. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a pretreatment device for an online spectrometer in a coal gasification unit that prevents clogging. This device effectively pretreatments sample gases with high dust content, high moisture content, and high temperature, preventing impurities such as moisture and dust from entering the detection unit and contaminating the detector or even damaging parts of the detection unit, thus ensuring the sample gas is stably suitable for spectrometer detection. Furthermore, by incorporating a steam backflushing system, it avoids clogging of sampling pipelines and probes, ensuring the spectrometer can perform continuous and normal sampling and analysis.

[0006] This utility model discloses a pretreatment device for an online spectrometer in a coal gasification unit that avoids clogging. The device includes a filtration mechanism, a cooling mechanism, a pressure-reducing mechanism, and a separation mechanism. The filtration mechanism performs preliminary filtration of the sample gas to remove large particulate dust. The cooling mechanism is installed on the filtration mechanism to cool the sample gas. The pressure-reducing mechanism is installed on the cooling mechanism to reduce the pressure of the sample gas. The separation mechanism is installed on the pressure-reducing mechanism to perform gas-liquid separation of the sample gas. The pretreated sample gas is then sent to the testing mechanism for analysis.

[0007] During operation, the filtration mechanism performs preliminary filtration of the sample gas to remove large particulate dust. The sample gas is then transported to the cooling mechanism for cooling and dehydration. After cooling, the sample gas undergoes a first-stage pressure reduction process via a pressure-reducing mechanism. The pressure after the first-stage pressure reduction is approximately 1.2 MPa, ensuring safety within the pretreatment chamber and reducing the pressure on the compression fittings. The reduced-pressure sample gas is then transported to the separation mechanism for gas-liquid separation. After separation, the sample gas undergoes further pressure reduction, with the pressure after the second-stage pressure reduction reaching approximately 0.6-0.8 MPa, to meet the pressure requirements of the testing equipment. Finally, the pretreated sample gas is sent to the testing mechanism for analysis. After analysis, the sample gas is returned to the flare line via a return pipeline for further processing, achieving a closed-loop system that does not pollute the environment.

[0008] Preferably, the filtration mechanism includes a sampling pipe, a sampling probe, a filter, a backflushing steam inlet pipe, and a backflushing steam outlet pipe. The sampling pipe is connected to the coal gasification unit. The sampling probe is installed on the sampling pipe. The filter is connected to the sampling probe via a pipe and a valve is installed on the pipe. The backflushing steam inlet pipe is connected to the inside of the filter and has two valves. The backflushing steam outlet pipe is also connected to the inside of the filter and has two valves. The sampling probe extracts the sample gas from the sampling pipe and delivers it to the filter. During normal operation, the valves on the backflushing steam inlet pipe and the backflushing steam outlet pipe are closed. The filter filters the sample gas, removing large particles of dust. If the filter becomes clogged during operation, the valves before and after the filter can be closed, and the valves on the backflushing steam inlet pipe and the backflushing steam outlet pipe can be opened to purge the filter. When the equipment is under maintenance, only the valve after the filter needs to be closed, and the valves on the backflushing steam inlet pipe and the backflushing steam outlet pipe need to be opened. This not only purges and cleans the filter but also simultaneously purges the sampling probe and the sampling pipe.

[0009] Preferably, the cooling mechanism includes a water cooler, a cooling water inlet pipe, a cooling water outlet pipe, a primary air cooler, a first vortex cooler, a first instrument air pressure regulating valve, and a T-type filter. The water cooler and the filter are connected by pipes with valves installed on them. The cooling water inlet pipe is connected to the interior of the water cooler and has two valves. The cooling water outlet pipe is also connected to the interior of the water cooler and has two valves. The primary air cooler is connected to the water cooler by pipes. The first vortex cooler is connected to the interior of the primary air cooler. The first instrument air pressure regulating valve is installed on the first vortex cooler. The T-type filter is connected to the primary air cooler via a pipeline. The filtered sample gas enters the water cooler through the pipeline. The valves on the cooling water inlet and outlet pipes are opened, and cooling water enters the water cooler through the cooling water inlet pipe to cool the sample gas. Then, the cooling water is discharged through the cooling water outlet pipe. The cooled sample gas enters the primary air cooler, where the first vortex cooler delivers cold air to further cool and remove water from the sample gas. The airflow of the first vortex cooler can be adjusted by the first instrument air pressure regulating valve. The dehydrated sample gas passes through the T-type filter for dust removal.

[0010] Preferably, the pressure-reducing mechanism includes a ceramic filter, a local pressure gauge, a primary pressure reducing valve, a return pipe, a needle valve, two sets of first check valves, and a safety valve. The ceramic filter and the T-type filter are connected by a pipe. The local pressure gauge is installed on the pipe in front of the ceramic filter, the primary pressure reducing valve is installed on the pipe behind the ceramic filter, the return pipe is connected to the ceramic filter by a pipe, the needle valve is installed on the pipe between the return pipe and the ceramic filter, the two sets of first check valves are respectively installed on the pipe between the return pipe and the ceramic filter and the pipe between the primary pressure reducing valve and the return pipe, and the safety valve is installed on the pipe between the primary pressure reducing valve and the return pipe. The sample gas, after being filtered by the T-type filter, enters the ceramic filter for further filtration. After filtration, the pressure is reduced by the primary pressure reducing valve, decreasing the pressure from 6.2 MPa in the sampling pipe to 1.2 MPa. The pressure is monitored by the local pressure gauge. After the pressure is reduced by the first-stage pressure reducing valve, the sample gas is delivered to the separation mechanism. At the same time, the needle valve can be opened, and the sample gas filtered by the ceramic filter can enter the return pipe for backflow. By setting the first check valve, the airflow in the return pipe is prevented from entering the first-stage pressure reducing valve.

[0011] Preferably, the separation mechanism includes a secondary air cooler, a second vortex cooler, a second instrument air regulating valve, a local thermometer, a gas-liquid separator, and a float-type drain tank. The secondary air cooler is connected to the primary pressure reducing valve via a pipeline. The second vortex cooler is installed on the secondary air cooler, the second instrument air regulating valve is installed on the second vortex cooler, and the local thermometer is installed on the secondary air cooler. The gas-liquid separator is connected to the secondary air cooler via a pipeline, and the float-type drain tank is connected to both the secondary air cooler and the gas-liquid separator. The sample gas, after being depressurized by the primary pressure reducing valve, enters the secondary air cooler. The airflow is regulated by the second instrument air regulating valve. The second vortex cooler delivers cold air to the secondary air cooler to further cool and remove moisture from the sample gas. Then, the sample gas enters the gas-liquid separator for gas-liquid separation. The moisture separated in the secondary air cooler and the gas-liquid separator is discharged into the float-type drain tank. The temperature is monitored by the local thermometer.

[0012] Preferably, the testing mechanism includes a fiberglass filter, a secondary pressure reducing valve, a three-way valve, a testing cell, an inlet rotor flowmeter, two sets of second check valves, and a bypass glass rotor flowmeter. The fiberglass filter is internally connected to the gas-liquid separator. The secondary pressure reducing valve is connected to the fiberglass filter via a pipeline. The three-way valve is installed on the pipeline downstream of the secondary pressure reducing valve. The testing cell is connected to the three-way valve. The inlet rotor flowmeter is installed on the pipeline between the testing cell and the return sample pipeline. The two sets of second check valves are respectively installed on the pipeline between the testing cell and the return sample pipeline and on the pipeline between the fiberglass filter and the return sample pipeline. The bypass glass rotor flowmeter... The glass rotor flow meter is installed on the pipeline between the glass fiber filter and the return sample pipeline. After gas-liquid separation, the sample gas enters the glass fiber filter for filtration, and then enters the secondary pressure reducing valve for secondary pressure reduction. The sample gas pressure is reduced from 1.2 MPa to 0.6-0.8 MPa. The pressure-reduced sample gas enters the detection cell through a three-way valve for detection. The detected sample gas flows back to the return sample pipeline through the sample inlet rotor flow meter. Two sets of second check valves prevent gas in the return sample pipeline from entering the detection cell. By setting a bypass glass rotor flow meter, it is convenient to transport part of the sample gas after the glass fiber filter to the return sample pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. Effectively pre-treat sample gases with high dust content, high moisture content, and high temperature to prevent moisture, dust, and other impurities from entering the detection unit, contaminating the detector, or even damaging parts of the detection unit, ensuring that the sample gas is stably suitable for detection by the spectrometer;

[0015] 2. By setting up a steam backflushing system, the problem of blockage in the sampling pipeline and sampling probe can be avoided, ensuring that the spectrometer can continuously and normally collect sample gas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the filter mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the cooling mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the pressure-reducing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the separation mechanism of this utility model;

[0021] Figure 6 This is a structural schematic diagram of the pressure reduction mechanism and the detection mechanism of this utility model.

[0022] In the attached diagram, the following are labeled: 01, filtration mechanism; 11, sampling pipe; 12, sampling probe; 13, filter; 14, backflush steam inlet pipe; 15, backflush steam outlet pipe; 02, cooling mechanism; 21, water cooler; 22, cooling water inlet pipe; 23, cooling water outlet pipe; 24, primary air cooler; 25, first vortex cooler; 26, first instrument air pressure regulating valve; 27, T-type filter; 03, pressure reducing mechanism; 31, ceramic filter; 32, local pressure gauge; 33, primary pressure reducing valve; 3 4. Sample return pipeline; 35. Needle valve; 36. First check valve; 37. Safety valve; 04. Separation mechanism; 41. Secondary air cooler; 42. Second vortex cooler; 43. Second instrument air pressure regulating valve; 44. Local thermometer; 45. Gas-liquid separator; 46. Float-type drain tank; 05. Detection mechanism; 51. Fiberglass filter; 52. Secondary pressure reducing valve; 53. Three-way valve; 54. Detection cell; 55. Sample inlet rotor flow meter; 56. Second check valve; 57. Bypass glass rotor flow meter. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0024] Example 1

[0025] This utility model discloses a pretreatment device for an online spectrometer in a coal gasification unit that avoids clogging. It includes a filtration mechanism 01, a cooling mechanism 02, a pressure-reducing mechanism 03, and a separation mechanism 04. The filtration mechanism 01 performs preliminary filtration of the sample gas, removing large particulate dust. The cooling mechanism 02 is installed on the filtration mechanism 01 and cools the sample gas. The pressure-reducing mechanism 03 is installed on the cooling mechanism 02 and reduces the pressure of the sample gas. The separation mechanism 04 is installed on the pressure-reducing mechanism 03 and performs gas-liquid separation of the sample gas. The pretreated sample gas is sent to the detection mechanism 05 for testing. The filtration mechanism 01 includes a sampling pipe 11, a sampling probe 12, a filter 13, and a backflushing steam... The steam inlet pipe 14 and the backflush steam outlet pipe 15 are connected to the coal gasification unit. The sampling pipe 11 is connected to the sampling probe 12. The filter 13 is connected to the sampling probe 12 through a pipe and a valve is installed on the pipe. The backflush steam inlet pipe 14 is connected to the inside of the filter 13 and is equipped with two valves. The backflush steam outlet pipe 15 is connected to the inside of the filter 13 and is equipped with two valves. The cooling mechanism 02 includes a water cooler 21, a cooling water inlet pipe 22, a cooling water outlet pipe 23, a primary air cooler 24, a first vortex cooler 25, a first instrument air pressure regulating valve 26, and a T-type filter 27. The water cooler 21 and the filter 13 is connected by a pipeline and a valve is installed on the pipeline. The cooling water inlet pipe 22 is connected to the inside of the water cooler 21 and is equipped with two valves. The cooling water outlet pipe 23 is connected to the inside of the water cooler 21 and is equipped with two valves. The primary air cooler 24 is connected to the water cooler 21 by a pipeline. The first vortex cooler 25 is connected to the inside of the primary air cooler 24. The first instrument air pressure regulating valve 26 is installed on the first vortex cooler 25. The T-type filter 27 is connected to the primary air cooler 24 by a pipeline. The pressure reducing mechanism 03 includes a ceramic filter 31, a local pressure gauge 32, a primary pressure reducing valve 33, a return pipe 34, a needle valve 35, and two sets of secondary pressure reducing valves. A check valve 36 and a safety valve 37 are provided. The ceramic filter 31 and the T-type filter 27 are connected by a pipeline. The local pressure gauge 32 is installed on the pipeline in front of the ceramic filter 31. The first-stage pressure reducing valve 33 is installed on the pipeline behind the ceramic filter 31. The return pipe 34 is connected to the ceramic filter 31 by a pipeline. The needle valve 35 is installed on the pipeline between the return pipe 34 and the ceramic filter 31. Two sets of first check valves 36 are installed on the pipeline between the return pipe 34 and the ceramic filter 31 and the pipeline between the first-stage pressure reducing valve 33 and the return pipe 34, respectively. The safety valve 37 is installed on the pipeline between the first-stage pressure reducing valve 33 and the return pipe 34.The separation mechanism 04 includes a secondary air cooler 41, a second vortex cooler 42, a second instrument air regulating valve 43, a local thermometer 44, a gas-liquid separator 45, and a float-type drain tank 46. The secondary air cooler 41 is connected to the primary pressure reducing valve 33 via a pipeline. The second vortex cooler 42 is installed on the secondary air cooler 41. The second instrument air regulating valve 43 is installed on the second vortex cooler 42. The local thermometer 44 is installed on the secondary air cooler 41. The gas-liquid separator 45 is connected to the secondary air cooler 41 via a pipeline. The float-type drain tank 46 is connected to both the secondary air cooler 41 and the gas-liquid separator 45. During operation, firstly, the sampling probe 12 extracts the sample gas from the sampling pipeline 11 and delivers it to the filter 13. During operation, the valves on the backflushing steam inlet pipe 14 and the backflushing steam outlet pipe 15 are both closed. The filter 13 filters the sample gas, removing large particles of dust. If the filter 13 is found to be clogged during operation, the valves before and after the filter 13 can be closed, and the valves on the backflushing steam inlet pipe 14 and the backflushing steam outlet pipe 15 can be opened to purge the filter 13. When the equipment is under maintenance, only the valve after the filter 13 needs to be closed, and the valves on the backflushing steam inlet pipe 14 and the backflushing steam outlet pipe 15 need to be opened. This not only purges and cleans the filter 13, but also purges the sampling probe 12 and the sampling pipe 11 at the same time. The filtered sample gas enters the water cooler 21 through the pipe. The cooling water inlet pipe 22 and the cooling water outlet pipe 23 are opened. The valve on pipe 3 allows cooling water to enter the water cooler 21 through the cooling water inlet pipe 22 to cool the sample gas. The cooling water then exits through the cooling water outlet pipe 23. The cooled sample gas enters the primary air cooler 24, where the first vortex cooler 25 delivers cold air for further cooling and dehydration. The airflow of the first vortex cooler 25 can be adjusted via the first instrument air pressure regulating valve 26. After dehydration, the sample gas passes through a T-type filter 27 for dust removal. Following dust removal, the sample gas enters a ceramic filter 31 for further filtration. After filtration, the pressure is reduced by the primary pressure reducing valve 33, decreasing from 6.2 MPa in the sampling pipeline 11 to 1.2 MPa. The pressure is monitored by the local pressure gauge 32. After the primary pressure reducing valve 33 reduces the pressure, the sample gas is delivered to the separation mechanism 04. Simultaneously, the needle valve 35 can be opened, allowing the sample gas filtered by the ceramic filter 31 to flow back into the return pipe 34. A first check valve 36 prevents airflow from the return pipe 34 from entering the primary pressure reducing valve 33. The sample gas, after pressure reduction by the primary pressure reducing valve 33, enters the secondary air cooler 41. The airflow is regulated by the second instrument air regulating valve 43. The second vortex cooler 42 delivers cold air to the secondary air cooler 41 for further cooling and dehydration of the sample gas. The sample gas then enters the gas-liquid separator 45 for gas-liquid separation. The water separated in the secondary air cooler 41 and the gas-liquid separator 45 is discharged into the float-type drain tank 46. The temperature is monitored by the local thermometer 44.

[0026] Example 2

[0027] like Figures 1 to 6As shown, this utility model discloses a pretreatment device for an online spectrometer in a coal gasification unit that avoids clogging. Based on Embodiment 1, the detection mechanism 05 includes a fiberglass filter 51, a secondary pressure reducing valve 52, a three-way valve 53, a detection cell 54, an inlet rotor flowmeter 55, two sets of second check valves 56, and a bypass glass rotor flowmeter 57. The fiberglass filter 51 is internally connected to the gas-liquid separator 45. The secondary pressure reducing valve 52 is connected to the fiberglass filter 51 via a pipeline. The three-way valve 53 is installed on the pipeline downstream of the secondary pressure reducing valve 52. The detection cell 54 is connected to the three-way valve 53. The inlet rotor flowmeter 55 is installed on the detection... Two sets of second check valves 56 are installed on the pipeline between the detection pool 54 and the return pipeline 34, and on the pipeline between the fiberglass filter 51 and the return pipeline 34, respectively. A bypass glass rotor flow meter 57 is installed on the pipeline between the fiberglass filter 51 and the return pipeline 34. During operation, the sampling probe 12 first extracts the sample gas from the sampling pipeline 11 and delivers it to the filter 13. During normal operation, the valves on the backflushing steam inlet pipe 14 and the backflushing steam outlet pipe 15 are closed. The filter 13 filters the sample gas, removing large particles of dust. If filter 13 is found to be clogged during operation, the valves before and after filter 13 can be closed, and the valves on the backflushing steam inlet pipe 14 and backflushing steam outlet pipe 15 can be opened to purge filter 13. When the equipment is under maintenance, simply close the valve after filter 13 and open the valves on the backflushing steam inlet pipe 14 and backflushing steam outlet pipe 15. This will not only purge and clean filter 13, but also purge sampling probe 12 and sampling pipe 11 at the same time. The filtered sample gas enters the water cooler 21 through the pipe. Open the valves on the cooling water inlet pipe 22 and cooling water outlet pipe 23, and the cooling water will flow through the cooling water inlet pipe 22. The sample gas enters the water cooler 21 to cool it down, and then the cooling water is discharged through the cooling water outlet pipe 23. The cooled sample gas enters the primary air cooler 24. The first vortex cooler 25 delivers cold air to the primary air cooler 24 to further cool and remove water from the sample gas. The air supply of the first vortex cooler 25 can be adjusted by the first instrument air pressure regulating valve 26. The water-removed sample gas passes through the T-type filter 27 for dust removal. After dust removal by the T-type filter 27, the sample gas enters the ceramic filter 31 for further filtration. After filtration, the pressure is reduced by the primary pressure reducing valve 33, and the pressure is reduced from 6.2 MPa in the sampling pipeline 11 to 1 MPa.The pressure is 2 MPa. The pressure is monitored by a local pressure gauge 32. After pressure reduction by the primary pressure reducing valve 33, the sample gas is delivered to the separation mechanism 04. Simultaneously, the needle valve 35 can be opened, allowing the sample gas filtered by the ceramic filter 31 to flow back into the return pipe 34. A first check valve 36 prevents airflow from the return pipe 34 from entering the primary pressure reducing valve 33. The sample gas, after pressure reduction by the primary pressure reducing valve 33, enters the secondary air cooler 41. The airflow is regulated by the second instrument air regulating valve 43. The second vortex cooler 42 delivers cold air to the secondary air cooler 41 for further cooling and dehydration of the sample gas. Then, the sample gas enters the gas-liquid separator 45 for gas-liquid separation. The secondary air cooler 41 and the gas-liquid separator 45... The separated water enters the float-type drainage tank 46 for discharge. The temperature is monitored by the local thermometer 44. The sample gas after gas-liquid separation enters the glass fiber filter 51 for filtration, and then enters the secondary pressure reducing valve 52 for secondary pressure reduction, lowering the sample gas pressure from 1.2 MPa to 0.6-0.8 MPa. The pressure-reduced sample gas enters the detection cell 54 through the three-way valve 53 for detection. The detected sample gas flows back to the return pipe 34 through the sample inlet rotor flowmeter 55. Two sets of second check valves 56 prevent gas in the return pipe 34 from entering the detection cell 54. A bypass glass rotor flowmeter 57 is installed to facilitate the delivery of the sample gas after the glass fiber filter 51 to the return pipe 34.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, characterized in that, It includes a filtration mechanism (01), a cooling mechanism (02), a pressure reducing mechanism (03), and a separation mechanism (04); the filtration mechanism (01) performs preliminary filtration on the sample gas to remove large particulate dust from the sample gas; the cooling mechanism (02) cools the sample gas; the pressure reducing mechanism (03) reduces the pressure of the sample gas; the separation mechanism (04) separates the sample gas into gas and liquid; and the pre-treated sample gas is sent to the testing mechanism (05) for testing.

2. The pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, as described in claim 1, is characterized in that... The filtration mechanism (01) includes a sampling pipe (11), a sampling probe (12), a filter (13), a backflushing steam inlet pipe (14), and a backflushing steam outlet pipe (15). The sampling pipe (11) is connected to the coal gasification device. The sampling probe (12) is installed on the sampling pipe (11). The filter (13) is connected to the sampling probe (12) through a pipe and a valve is provided on the pipe. The backflushing steam inlet pipe (14) is connected to the inside of the filter (13) and is provided with two valves. The backflushing steam outlet pipe (15) is connected to the inside of the filter (13) and is provided with two valves.

3. The pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, as described in claim 2, is characterized in that... The cooling mechanism (02) includes a water cooler (21), a cooling water inlet pipe (22), a cooling water outlet pipe (23), a primary air cooler (24), a first vortex cooler (25), a first instrument air pressure regulating valve (26), and a T-type filter (27). The water cooler (21) and the filter (13) are connected by a pipe and a valve is installed on the pipe. The cooling water inlet pipe (22) is connected to the inside of the water cooler (21) and is equipped with two valves. The cooling water outlet pipe (23) is connected to the inside of the water cooler (21) and is equipped with two valves. The primary air cooler (24) is connected to the water cooler (21) by a pipe. The first vortex cooler (25) is connected to the inside of the primary air cooler (24). The first instrument air pressure regulating valve (26) is installed on the first vortex cooler (25). The T-type filter (27) is connected to the primary air cooler (24) by a pipe.

4. The pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, as described in claim 3, is characterized in that... The pressure reducing mechanism (03) includes a ceramic filter (31), a local pressure gauge (32), a first-stage pressure reducing valve (33), a return pipe (34), a needle valve (35), two sets of first check valves (36) and a safety valve (37). The ceramic filter (31) is connected to the T-type filter (27) through a pipe. The local pressure gauge (32) is installed on the pipe in front of the ceramic filter (31). The first-stage pressure reducing valve (33) is installed on the pipe behind the ceramic filter (31). The return pipe (34) is connected to the ceramic filter (31) through a pipe. The needle valve (35) is installed on the pipe between the return pipe (34) and the ceramic filter (31). The two sets of first check valves (36) are respectively installed on the pipe between the return pipe (34) and the ceramic filter (31) and on the pipe between the first-stage pressure reducing valve (33) and the return pipe (34). The safety valve (37) is installed on the pipe between the first-stage pressure reducing valve (33) and the return pipe (34).

5. The pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, as described in claim 4, is characterized in that... The separation mechanism (04) includes a secondary air cooler (41), a second vortex cooler (42), a second instrument air regulating valve (43), a local temperature gauge (44), a gas-liquid separator (45), and a float-type drain tank (46). The secondary air cooler (41) is connected to the primary pressure reducing valve (33) through a pipeline. The second vortex cooler (42) is installed on the secondary air cooler (41). The second instrument air regulating valve (43) is installed on the second vortex cooler (42). The local temperature gauge (44) is installed on the secondary air cooler (41). The gas-liquid separator (45) is connected to the secondary air cooler (41) through a pipeline. The float-type drain tank (46) is connected to both the secondary air cooler (41) and the gas-liquid separator (45).

6. The pretreatment device for an online spectrometer in a coal gasification unit to avoid clogging, as described in claim 5, is characterized in that... It also includes a testing unit (05), which includes a fiberglass filter (51), a secondary pressure reducing valve (52), a three-way valve (53), a testing tank (54), an inlet rotor flow meter (55), two sets of second check valves (56), and a bypass glass rotor flow meter (57). The fiberglass filter (51) is internally connected to the gas-liquid separator (45), and the secondary pressure reducing valve (52) is connected to the fiberglass filter (51) through a pipeline. The three-way valve (53) is installed on the secondary pressure reducing valve (52). On the rear side of the pipeline, the detection pool (54) is connected to the three-way valve (53), the sample inlet rotor flow meter (55) is installed on the pipeline between the detection pool (54) and the return pipe (34), two sets of second check valves (56) are respectively installed on the pipeline between the detection pool (54) and the return pipe (34) and the pipeline between the glass fiber filter (51) and the return pipe (34), and the bypass glass rotor flow meter (57) is installed on the pipeline between the glass fiber filter (51) and the return pipe (34).

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