Coal gasification analysis pretreatment system

Abstract

The invention provides a coal gasification analysis pretreatment system, belongs to the technical field of coal chemical industry, and is used for solving the problem that sample pretreatment does not reach the standard. The coal gasification analysis pretreatment system comprises a front-stage pretreatment system and a rear-stage pretreatment system. The preceding-stage pretreatment system comprises a cooling module, a first filtering module and a pressure reduction module. The post-stage pretreatment system comprises a gas-liquid separation module, a second filtering module, a condensation liquid removal module, a third filtering module, a flow path switching module and a measurement module. According to the coal gasification analysis pretreatment system, the pretreatment quality of samples can be improved, and safe operation of an analysis instrument is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal gasification analysis pretreatment system. Background Art

[0002] High-temperature, high-pressure, water-containing samples need to be pretreated before entering the analytical instrument for analysis. The sample pretreatment system is used to physically treat the sampled samples in accordance with the sampling specifications of the analytical instrument. The sample pretreatment system is divided into pre-stage pretreatment and post-stage pretreatment, which can ensure that the samples entering the analytical instrument meet the standards and do not damage the analytical instrument, providing long-term and effective data for the process. At present, the problems that are prone to occur in the sample pretreatment system mainly include: the sample gas contains ammonia salt components, and crystals block the sampling probe and the pre-stage pretreatment system; the post-stage pretreatment cannot effectively cool the sample gas, remove water, remove dust, stabilize the pressure and flow, and separate the gas and liquid, resulting in water vapor and impurities entering the measurement module, causing the instrument measurement data to be distorted and unable to operate stably for a long time. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a coal gasification analysis pretreatment system that can ensure the safe and reliable operation of the analytical instrument.

[0004] In order to solve the above problems, the present invention provides a coal gasification analysis pretreatment system, including: a pre-stage pretreatment system and a post-stage pretreatment system. The pre-stage pretreatment system includes: a cooling module, a first filtering module and a decompression module. In the pre-stage pretreatment system, the sample is cooled by the cooling module, enters the first filtering module for preliminary filtration, and then enters the post-stage pretreatment system after being decompressed by the decompression module. The post-stage pretreatment system includes: a gas-liquid separation module, a second filtering module, a condensation and dehydration module, a third filtering module, a flow path switching module and a measurement module. In the post-stage pretreatment system, the sample is subjected to gas-liquid separation by the gas-liquid separation module, and the separated gas enters the condensation and dehydration module through the second filtering module for dehydration, and enters the flow path switching module through the third filtering module after dehydration. The flow path switching module is respectively connected to the analytical instrument and the standard gas cylinder. The flow path switching module enables the sample to enter the analytical instrument to analyze the sample; the flow path switching module also enables the standard gas cylinder to be connected to the analytical instrument to calibrate the analytical instrument. The measurement module is used to obtain the pressure and flow in the post-stage pretreatment system.

[0005] Optionally, the front stage pretreatment system includes a first heating module. The first heating module can provide heat for the front stage pretreatment system. The rear stage pretreatment system includes a second heating module. The second heating module can provide heat for the rear stage pretreatment system.

[0006] Optionally, the cooling module includes a cooler. A first shut-off valve is provided on the inlet pipeline of the cooler. A drain valve is provided on the drain pipeline of the cooler. The exhaust pipeline of the cooler is connected to the first filter module.

[0007] Optionally, the first filter module includes at least two filters. At least two filters are connected in parallel between the cooling module and the pressure reducing module. A second shutoff valve is provided on the inlet of each filter. A third shutoff valve is provided on the outlet of each filter. The pressure reducing module includes a first pressure reducing valve. The outlet of the first pressure reducing valve is connected to the post-stage pretreatment system.

[0008] Optionally, the gas-liquid separation module includes a separation tank. The inlet pipeline of the separation tank is connected to the pre-stage pretreatment system. On the inlet pipeline of the separation tank, a fourth shut-off valve and a safety valve are sequentially arranged along the flow direction of the sample. A fifth shut-off valve is arranged on the discharge pipeline of the separation tank. The exhaust pipeline of the separation tank is connected to the second filter module.

[0009] Optionally, the second filtration module includes a membrane filter. The air inlet of the membrane filter is connected to the exhaust port of the gas-liquid separation module. The liquid discharge port of the membrane filter is respectively connected to the first branch pipeline and the second branch pipeline. A first observation window is provided on the first branch pipeline. A one-way valve is provided on the second branch pipeline. The air outlet of the membrane filter is connected to the condensation and dehydration module.

[0010] Optionally, the condensation and dehydration module includes a refrigeration tank. The refrigeration tank is connected to the condensation gas source through a condensation gas pipeline. Along the flow direction of the condensation gas, a sixth shut-off valve and a second pressure reducing valve are sequentially arranged on the condensation gas pipeline. An observation window and a drain valve are arranged on the drain pipeline of the refrigeration tank. The exhaust pipeline of the refrigeration tank is connected to the third filter module.

[0011] Optionally, the third filter module comprises at least two fiber filters, and the at least two fiber filters are connected in parallel.

[0012] Optionally, the flow path switching module includes a first pipeline and a second pipeline. The first pipeline is connected between the third filter module and the first analytical instrument. Along the sample flow direction in the first pipeline, a first pneumatic valve, a first three-way ball valve and a second pneumatic valve are sequentially arranged on the first pipeline. The second pipeline is connected between the first analytical instrument and the second analytical instrument. Along the sample flow direction in the second pipeline, a second three-way valve and a paper filter are sequentially arranged on the second pipeline. Standard gas cylinders are respectively connected to the first three-way valve and the second three-way valve.

[0013] Optionally, the measuring module includes: a pressure sensor, a first flowmeter, a second flowmeter and a third flowmeter. The pressure sensor is used to obtain the exhaust pressure of the gas-liquid separation module. The first flowmeter is used to obtain the discharge flow of the second filter module. The second flowmeter and the third flowmeter are respectively used to obtain the sample flow of each flow path in the flow path switching module.

[0014] Beneficial Effects

[0015] The coal gasification analysis pretreatment system provided by the present invention includes a pre-stage pretreatment system and a post-stage pretreatment system. The pre-stage pretreatment system includes a cooling module, a first filtering module and a decompression module. In the pre-stage pretreatment system, the sample is cooled by the cooling module, enters the first filtering module for preliminary filtration, and then enters the post-stage pretreatment system after being decompressed by the decompression module, which can reduce the problems of sample crystallization blockage, high water content, and many impurities, effectively ensuring the primary treatment effect of the sample, and after filtering and decompression, the post-stage pretreatment processing load is greatly reduced, which lays the foundation for the long-term stable operation of the analytical instrument. The post-stage pretreatment system includes a gas-liquid separation module, a second filtering module, a condensation and dehydration module, a third filtering module, a flow path switching module and a measurement module. In the post-stage pretreatment system, the sample is subjected to gas-liquid separation by the gas-liquid separation module, and the separated gas enters the condensation and dehydration module through the second filtering module for dehydration, and enters the flow path switching module through the third filtering module after dehydration. The flow path switching module is connected to the analytical instrument and the standard gas cylinder respectively. The measurement module is used to obtain the pressure and flow in the post-stage pretreatment system. It is helpful to reduce the sample containing liquid and coal powder impurities, reduce valve aging and leakage and other faults, eliminate interference factors, ensure the reliable operation of the analytical instrument, and can completely retain the measured components of the sample, and enable the measured sample to continue to enter the analytical instrument for analysis, improve the accuracy and precision of the measurement results to obtain reliable analysis results, and provide a strong reference basis for process control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a coal gasification analysis pretreatment system according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a pre-stage pretreatment system according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of a post-stage preprocessing system according to an embodiment of the present invention.

[0019] The reference numerals are:

[0020] 1. Pre-treatment system; 2. Post-treatment system; 3. Analytical instrument; 4. Standard gas cylinder

[0021] 11. Cooling module; 12. First filtering module; 13. Pressure reducing module; 14. First heating module;

[0022] 21. Gas-liquid separation module; 22. Second filtering module; 23. Condensation and dehydration module; 24. Third filtering module; 25. Flow path switching module; 26. Measurement module; 27. Second heating module;

[0023] 31. First analytical instrument; 32. Second analytical instrument.

[0024] 111. Cooler; 112. First shut-off valve; 113. Drain valve;

[0025] 121. filter; 122. second shut-off valve; 123. third shut-off valve;

[0026] 131, first pressure reducing valve;

[0027] 211, separation tank; 212, fourth shut-off valve; 213, safety valve; 214, fifth shut-off valve;

[0028] 221, membrane filter; 222, first branch pipeline; 223, first observation window; 224, second branch pipeline; 225, one-way valve;

[0029] 231, refrigeration tank; 232, condensing gas pipeline; 233, sixth shut-off valve; 234, second pressure reducing valve; 235, second observation window; 236, drain valve;

[0030] 241. Fiber filter;

[0031] 251, first pipeline; 252, first pneumatic valve; 253, first three-way valve; 254, second pneumatic valve; 255, second pipeline; 256, second three-way valve; 257, paper filter;

[0032] 261. Pressure sensor; 262. First flow meter; 263. Second flow meter; 264. Third flow meter. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] This embodiment provides a coal gasification analysis preprocessing system. Figure 1 A schematic diagram of the structure of a coal gasification analysis preprocessing system provided in this embodiment. Figure 2 A schematic diagram of the structure of a pre-stage preprocessing system of an embodiment provided in this embodiment. Figure 3 A schematic diagram of the structure of a post-stage preprocessing system of an embodiment provided in this embodiment.

[0038] like Figures 1 to 3As shown, the coal gasification analysis pretreatment system of this embodiment includes a front-stage pretreatment system 1 and a rear-stage pretreatment system 2. The front-stage pretreatment system 1 includes: a cooling module 11, a first filtering module 12 and a decompression module 13. In the front-stage pretreatment system 1, the sample is cooled by the cooling module 11, enters the first filtering module 12 for preliminary filtration, and then enters the rear-stage pretreatment system 2 after being decompressed by the decompression module 13. The rear-stage pretreatment system 2 includes: a gas-liquid separation module 21, a second filtering module 22, a condensation and dehydration module 23, a third filtering module 24, a flow path switching module 25 and a measurement module 26. In the rear-stage pretreatment system 2, the sample is subjected to gas-liquid separation by the gas-liquid separation module 21, and the separated gas enters the condensation and dehydration module 23 through the second filtering module 22 for dehydration, and after dehydration, enters the flow path switching module 25 through the third filtering module 24. The flow path switching module 25 is respectively connected to the analysis instrument 3 and the standard gas cylinder 4. The flow switching module 25 can allow the sample to enter the analysis instrument 3 for analysis; the flow switching module 25 can also connect the standard gas cylinder 4 to the analysis instrument 3 to calibrate the analysis instrument 3. The measurement module 26 is used to obtain the pressure and flow in the post-stage pretreatment system 2.

[0039] The coal gasification analysis pretreatment system of this embodiment includes a front-stage pretreatment system 1 and a rear-stage pretreatment system 2 .

[0040] The pre-stage pretreatment system 1 includes a cooling module 11, a first filtering module 12 and a decompression module 13. In the pre-stage pretreatment system 1, the sample is cooled by the cooling module 11, enters the first filtering module 12 for preliminary filtration, and then enters the post-stage pretreatment system 2 after being decompressed by the decompression module 13. The pre-stage pretreatment system 1 can reduce problems such as sample crystallization blockage, high water content, and many impurities, effectively ensuring the primary treatment effect of the sample, and after filtering and decompression, the processing load of the post-stage pretreatment system 2 is greatly reduced, laying a foundation for the long-term stable operation of the analytical instrument 3.

[0041] The post-stage pretreatment system 2 includes a gas-liquid separation module 21, a second filter module 22, a condensation and dehydration module 23, a third filter module 24, a flow path switching module 25 and a measurement module 26. In the post-stage pretreatment system 2, the sample is subjected to gas-liquid separation by the gas-liquid separation module 21, and the separated gas enters the condensation and dehydration module 23 through the second filter module 22 for dehydration, and enters the flow path switching module 25 through the third filter module 24 after dehydration. The flow path switching module 25 is respectively connected to the analytical instrument 3 and the standard gas cylinder 4. The measurement module 16 is used to obtain the pressure and flow in the post-stage pretreatment system 2. The sample gas filtered by the third filter module 24 enters the flow path switching module 25. The flow path switching module 25 enables the sample gas to enter the analytical instrument 4 for sample analysis. The flow path switching module 25 can also connect the standard gas cylinder 4 to the analytical instrument 3 to calibrate the analytical instrument 3. The post-stage pretreatment system 2 can significantly reduce the amount of liquid and coal powder impurities in the sample, reduce valve aging and leakage and other faults, eliminate interference factors, and completely retain the measured components of the sample, and enable the measured sample to continue to enter the analysis instrument 3 for analysis, thereby improving the accuracy and precision of the measurement results to obtain reliable analysis results and provide a strong reference for process control.

[0042] In some embodiments, Figure 2 and Figure 3 As shown, the front stage pretreatment system 1 includes a first heating module 14. The first heating module 14 can provide heat for the front stage pretreatment system 1. The rear stage pretreatment system 2 includes a second heating module 27. The second heating module 27 can provide heat for the rear stage pretreatment system 2.

[0043] The first heating module 14 of this embodiment is disposed in the box where the pre-stage pretreatment system 1 is located, and can increase the temperature in the box to prevent the pre-stage pretreatment system 1 from being too low in ambient temperature and freezing in winter. In some examples, the first heating module 14 is a steam radiator.

[0044] The second heating module 27 of this embodiment is disposed in the box where the post-stage pretreatment system 2 is located, and can increase the temperature in the box to prevent the ambient temperature of the post-stage pretreatment system 2 from being too low and freezing in winter. In some examples, the second heating module 27 uses heating.

[0045] In some embodiments, Figure 2 As shown, the cooling module 11 includes a cooler 111. A first shut-off valve 112 is provided on the inlet pipeline of the cooler 111. A drain valve 113 is provided on the drain pipeline of the cooler 111. The exhaust pipeline of the cooler 111 is connected to the first filter module 12.

[0046] The cooling module 11 of this embodiment includes a cooler 111, a first shut-off valve 112 and a drain valve 113. The high-pressure, high-temperature, water-containing, impurity-containing synthesis gas sample enters the cooler 111 through the first shut-off valve 112. The synthesis gas sample is cooled in the cooler 111 (for example, a sample at 265 degrees Celsius is cooled to 80-90 degrees Celsius), and a large amount of water will be precipitated. The precipitated water can be discharged in real time through the drain valve 113. With the discharge of water, a large amount of impurities can also be discharged together, effectively removing impurities such as ammonium salts and water in the synthesis gas sample.

[0047] In some embodiments, Figure 2 As shown, the first filter module 12 includes at least two filters 121. At least two filters 121 are connected in parallel between the cooling module 11 and the pressure reducing module 13. A second shut-off valve 122 is provided at the inlet of each filter 121. A third shut-off valve 123 is provided at the outlet of each filter 121. The pressure reducing module 13 includes a first pressure reducing valve 131. The outlet of the first pressure reducing valve 131 is connected to the post-stage pretreatment system 2.

[0048] The filter 121 of this embodiment adopts a redundant design, which can not only improve the filtering efficiency but also prevent the system from shutting down due to the failure of a single filter 122. The inlet of the filter 121 of this embodiment is connected in parallel to the exhaust pipe of the cooler 111 through the second shut-off valve 122. The gas sample preliminarily treated by the cooler 111 enters the filter 121 through the second shut-off valve 122 for filtration. The filtered gas enters the first pressure reducing valve 131 through the third shut-off valve 123 for pressure reduction (for example, reducing the sample pressure from 60 kg to 2 kg), and then enters the post-stage pretreatment system 2 for further fine processing, which greatly reduces the burden of the post-stage pretreatment system 2.

[0049] In some embodiments, Figure 3 As shown, the gas-liquid separation module 21 includes a separation tank 211. The inlet pipeline of the separation tank 211 is connected to the pre-stage pretreatment system 1. On the inlet pipeline of the separation tank 211, a fourth shut-off valve 212 and a safety valve 213 are sequentially arranged along the flow direction of the sample. A fifth shut-off valve 214 is arranged on the discharge pipeline of the separation tank 211. The exhaust pipeline of the separation tank 211 is connected to the second filter module 22.

[0050] The gas-liquid separation module 21 of the present embodiment includes a separation tank 211. The inlet pipeline of the separation tank 211 is connected to the first pressure reducing valve 131 of the pre-stage pretreatment system 1. The first pressure reducing valve 131 sends the gas sample after primary treatment into the inlet pipeline of the separation tank 211 through a transmission pipeline. In the inlet pipeline of the separation tank 211, it first passes through the fourth shut-off valve 212 and then passes through the safety valve 213. If the gas sample pressure exceeds the set pressure of the safety valve 213, in order to ensure the safety of the valve parts in the back, most of the gas samples are depressurized from the safety valve 213, and a small part (less than 2 kg) of the gas sample can enter the separation tank 211 for gas-liquid separation. The separated liquid is stored in the separation tank 211, and the liquid stored in the separation tank 211 is discharged by regularly opening the fifth shut-off valve 214. The separated gas sample enters the second filter module 22 through the exhaust pipeline of the separation tank 211. By providing the separation tank 211, moisture and impurities in the gas sample can be further removed, the cleanliness of the sample can be improved, the pressure of the subsequent processing module can be reduced, and the accumulation of impurities can be avoided.

[0051] In some embodiments, Figure 3 As shown, the second filter module 22 includes a membrane filter 221. The air inlet of the membrane filter 221 is connected to the exhaust port of the gas-liquid separation module 21. The liquid discharge port of the membrane filter 221 is respectively connected to the first branch pipeline 222 and the second branch pipeline 224. The first branch pipeline 222 is provided with a first observation window 223. The second branch pipeline 224 is provided with a one-way valve 225. The air outlet of the membrane filter 221 is connected to the condensation and dehydration module 23.

[0052] The second filter module 22 of this embodiment includes a membrane filter 221, and the air inlet of the membrane filter 221 is connected to the exhaust pipeline of the separation tank 211. After the gas sample separated by the separation tank 211 enters the membrane filter 221, fine impurities can be filtered out, and the filtered impurities can be discharged into the torch through the second branch pipeline 224 and the one-way valve 225. If there are too many impurities, the excess impurities will enter the first observation window 223 on the first branch pipeline 222 to facilitate observation of the filtering effect. The filtered gas sample enters the condensation and dehydration module 23 from the air outlet of the membrane filter 221 for further processing.

[0053] In some embodiments, Figure 3 As shown, the condensation and dehydration module 23 includes a refrigeration tank 231. The refrigeration tank 231 is connected to the condensation gas source through a condensation gas pipeline 232. Along the flow direction of the condensation gas, a sixth shut-off valve 233 and a second pressure reducing valve 234 are sequentially provided on the condensation gas pipeline 232. A second observation window 235 and a drain valve 236 are provided on the drain pipeline of the refrigeration tank 231. The exhaust pipeline of the refrigeration tank 231 is connected to the third filter module 24.

[0054] The condensation and dehydration module 23 of this embodiment includes a refrigeration tank 231. The air inlet of the refrigeration tank 231 is connected to the air outlet of the membrane filter 221. The gas sample filtered by the membrane filter 221 enters the refrigeration tank 231 for condensation and dehydration, and the removed liquid can reach the drain valve 236 through the second observation window 235 on the drain pipeline and be discharged by the drain valve 236. Through the second observation window 235, it is possible to visually observe whether there are impurities in the gas sample. The refrigeration tank 231 is connected to the condensation gas source through the condensation gas pipeline 232. Along the flow direction of the condensation gas, the condensation gas pipeline 232 is sequentially provided with a sixth shut-off valve 233 and a second pressure reducing valve 234. The condensation gas reaches the second pressure reducing valve 234 by punching the sixth shut-off valve 233, and the size of the refrigeration capacity can be adjusted by the second pressure reducing valve 234. The gas sample after dehydration by the refrigeration tank 231 can enter the third filter module 24 through the exhaust pipeline of the refrigeration tank 231.

[0055] In some embodiments, Figure 3 As shown, the third filter module 24 includes at least two fiber filters 241. The at least two fiber filters 241 are connected in parallel.

[0056] The third filter module 24 of this embodiment includes at least two fiber filters 241, and adopts a redundant design, which is beneficial to improve the filtering efficiency and avoid the shutdown of the post-stage pretreatment system caused by the failure of a single fiber filter 241. The inlet of at least two fiber filters 241 of this embodiment is connected in parallel to the exhaust pipeline of the refrigeration tank 231. After the gas sample is dehydrated by the refrigeration tank 231 and then passes through the fiber filter 241, it can meet the entry requirements of the analysis instrument 3 and can enter the flow path switching module 25.

[0057] In some embodiments, Figure 3 As shown, the flow path switching module 25 includes a first pipeline 251 and a second pipeline 255. The first pipeline 251 is connected between the third filter module 24 and the first analytical instrument 31. Along the sample flow direction in the first pipeline 251, the first pipeline 251 is provided with a first pneumatic valve 252, a first three-way valve 253 and a second pneumatic valve 254 in sequence. The second pipeline 255 is connected between the first analytical instrument 31 and the second analytical instrument 32. Along the sample flow direction in the second pipeline 255, the second pipeline 255 is provided with a second three-way valve 256 and a paper filter 257 in sequence. The standard gas cylinder 4 is connected to the first three-way valve 253 and the second three-way valve 256, respectively.

[0058] The flow path switching module 25 of this embodiment includes a first pipeline 251 and a second pipeline 255. The first pipeline 251 is connected between the third filter module 24 and the first analytical instrument 31, and the second pipeline 255 is connected between the first analytical instrument 31 and the second analytical instrument 32. The gas sample filtered by the fiber filter 241 passes through the first pneumatic valve 252, the first three-way valve 253 and the second pneumatic valve 254 on the first pipeline 251 in sequence, and enters the first analytical instrument 31 for sample analysis. The sample analyzed by the first analytical instrument 31 enters the second pipeline 255, and passes through the second three-way valve 256 and the paper filter 257 in sequence to enter the second analytical instrument 32 for component content analysis. When the first analytical instrument 31 or the second analytical instrument 32 needs to be calibrated, the standard gas cylinder 4 is connected to the first analytical instrument 31 or the second analytical instrument 32 by switching the first three-way valve 253 or the second three-way valve 256 to calibrate the analytical instrument 3.

[0059] In some embodiments, Figure 3 As shown, the measuring module 26 includes: a pressure sensor 261, a first flow meter 262, a second flow meter 263 and a third flow meter 264. The pressure sensor 261 is used to obtain the exhaust pressure of the gas-liquid separation module 21. The first flow meter 262 is used to obtain the discharge flow of the second filter module 22. The second flow meter 263 and the third flow meter 264 are respectively used to obtain the sample flow of each flow path in the flow path switching module 25.

[0060] The measurement module of this embodiment includes a pressure sensor 261, a first flow meter 262, a second flow meter 263 and a third flow meter 264. The pressure sensor 261 is arranged between the separation tank 211 and the membrane filter 221, and is used to obtain the pressure of the gas sample discharged from the separation tank 211. The first flow meter 262 is arranged on the second branch pipeline 224 of the membrane filter 221, and is used to obtain the amount of impurities discharged by the membrane filter 221. The second flow meter 263 is arranged on the second pipeline 255 and is located between the first three-way valve 253 and the second pneumatic valve 254, and is used to obtain the gas flow entering the first analytical instrument 31. The third flow meter 264 is arranged on the second pipeline 255 and is located between the second three-way valve 256 and the paper filter 257, and is used to obtain the gas flow entering the second analytical instrument 31.

[0061] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A coal gasification analysis pretreatment system, characterized in that: include: Pre-stage pretreatment system and post-stage pretreatment system; The pre-stage pretreatment system comprises: a cooling module, a first filtering module and a decompression module; in the pre-stage pretreatment system, the sample is cooled by the cooling module, enters the first filtering module for preliminary filtration, and then enters the post-stage pretreatment system after being decompressed by the decompression module; The post-stage pretreatment system comprises: a gas-liquid separation module, a second filtering module, a condensation and dehydration module, a third filtering module, a flow path switching module and a measurement module; in the post-stage pretreatment system, the sample is subjected to gas-liquid separation by the gas-liquid separation module, and the separated gas enters the condensation and dehydration module through the second filtering module for dehydration, and after dehydration, enters the flow path switching module through the third filtering module; The flow path switching module is connected to the analytical instrument and the standard gas cylinder respectively; the flow path switching module can allow the sample to enter the analytical instrument to analyze the sample; and can also connect the standard gas cylinder to the analytical instrument to calibrate the analytical instrument; The measuring module is used to obtain the pressure and flow in the post-stage pretreatment system.

2. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The front-stage pretreatment system includes a first heating module; the first heating module can provide heat for the front-stage pretreatment system; The post-stage pre-treatment system includes a second heating module; the second heating module can provide heat for the post-stage pre-treatment system.

3. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The cooling module includes a cooler; A first shut-off valve is provided on the inlet pipeline of the cooler; A drain valve is provided on the drain pipe of the cooler; The exhaust pipeline of the cooler is connected to the first filter module.

4. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The first filter module includes at least two filters; at least two filters are connected in parallel between the cooling module and the pressure reducing module; a second shutoff valve is provided on the inlet of each filter; and a third shutoff valve is provided on the outlet of each filter; The pressure reducing module comprises a first pressure reducing valve; an outlet of the first pressure reducing valve is connected to the post-stage pretreatment system.

5. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The gas-liquid separation module includes a separation tank; The inlet pipeline of the separation tank is connected to the front-stage pretreatment system; the inlet pipeline of the separation tank is provided with a fourth shut-off valve and a safety valve in sequence along the flow direction of the sample; A fifth shut-off valve is provided on the discharge pipeline of the separation tank; The exhaust pipeline of the separation tank is connected to the second filter module.

6. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The second filtration module includes a membrane filter; The air inlet of the membrane filter is connected to the exhaust port of the gas-liquid separation module; The liquid discharge port of the membrane filter is connected to the first branch pipeline and the second branch pipeline respectively; the first branch pipeline is provided with a first observation window; the second branch pipeline is provided with a one-way valve; The gas outlet of the membrane filter is connected to the condensation and dehydration module.

7. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The condensation and dehydration module includes a refrigeration tank; The refrigeration tank is connected to the condensing gas source through a condensing gas pipeline; along the flow direction of the condensing gas, a sixth shut-off valve and a second pressure reducing valve are sequentially arranged on the condensing gas pipeline; A second observation window and a drain valve are provided on the drain pipe of the refrigeration tank; The exhaust pipeline of the refrigeration tank is connected to the third filter module.

8. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The third filter module includes at least two fiber filters; and the at least two fiber filters are connected in parallel.

9. The coal gasification analysis pretreatment system according to claim 1, characterized in that: The flow path switching module includes a first pipeline and a second pipeline; The first pipeline is connected between the third filter module and the first analytical instrument; along the flow direction of the sample in the first pipeline, a first pneumatic valve, a first three-way valve and a second pneumatic valve are sequentially arranged on the first pipeline; The second pipeline is connected between the first analytical instrument and the second analytical instrument; along the flow direction of the sample in the second pipeline, a second three-way valve and a paper filter are sequentially arranged on the second pipeline; The standard gas cylinders are connected to the first three-way valve and the second three-way valve respectively.

10. The coal gasification analysis preprocessing system according to claim 1, characterized in that: The measuring module comprises: A pressure sensor, used to obtain the exhaust pressure of the gas-liquid separation module; A first flow meter, used for obtaining the discharge flow of the second filter module; The second flow meter and the third flow meter are respectively used to obtain the sample flow of each flow path in the flow path switching module.

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