Harmful gas emission flux detection system for peripheral soil of pharmaceutical factory

Abstract

The invention relates to a pharmaceutical factory peripheral soil harmful gas emission flux detection system, and belongs to the technical field of soil harmful gas emission flux detection. The system comprises a gas analysis module, the gas analysis module is connected with a sample introduction module, the sample introduction module is connected with a plurality of gas collection modules with barrel bodies and barrel covers, partition plates are arranged on the gas collection modules, insertion holes are formed in the barrel covers, vent holes are formed in the side walls of the barrel bodies, and sealing structures are arranged on the barrel covers. The detection well is arranged at the peripheral soil of the pharmaceutical factory, before the gas collection modules are placed into the well, the partition plates are inserted into the insertion holes, the ventilation holes are closed, the gas collection modules are placed in different soil layers, the outer diameter of the barrel body is larger than the inner diameter of the detection well, the side wall of the barrel body is closed, and when the gas collection modules are inserted, a gap between the detection well and the barrel body can be eliminated; soil in the high-position soil layer is prevented from entering the low-position barrel body, and it is ensured that the pollution conditions of different soil layers can be accurately reflected in the follow-up detection process.

Description

Technical Field

[0001] The invention belongs to the technical field of soil harmful gas emission flux detection, and in particular relates to a soil harmful gas emission flux detection system around a pharmaceutical factory. Background Art

[0002] Pollutants generated by pharmaceutical factories need to be harmlessly treated in accordance with regulations, and this treatment process is related to environmental protection. With the advancement of pharmaceutical technology, the production and processing of drugs has become increasingly complicated. Improper waste disposal, chemical leakage and wastewater discharge may cause soil pollution, resulting in continuous emission of harmful gases from the soil, which has a negative impact on the ecological environment. Existing soil harmful gas emission flux detection systems usually transfer soil samples to a test box to monitor the composition and content of harmful gases, thereby evaluating the degree of soil contamination and ensuring that pharmaceutical factory production activities meet environmental protection standards.

[0003] Although the existing detection system can provide relevant data on soil harmful gases to a certain extent, it also has some shortcomings. First, the detection in the experimental box cannot truly reflect the emission of harmful gases between different soil layers, because the release characteristics of harmful gases in the soil may be very different at different depths and different compositions. In addition, soil samples from different batches are prone to interference during the experiment, resulting in inaccurate test results. This limitation makes it difficult for current detection technology to comprehensively assess the environmental risks of soil around pharmaceutical factories. Therefore, it is urgent to design a detection system to achieve accurate detection of soil harmful gas emission fluxes. Summary of the invention

[0004] The purpose of the present invention is to provide a soil harmful gas emission flux detection system around a pharmaceutical factory in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A system for detecting the emission flux of harmful gases from soil around a pharmaceutical factory comprises a gas analysis module, the sampling port of the gas analysis module is connected to an injection module, the injection module has multiple gas input ends, and the multiple gas input ends are all connected to a gas collection module, and the multiple gas collection modules form a gas collection module, which is used to collect harmful gases emitted from different soil layers around the pharmaceutical factory. The gas collection module is plugged with a partition, and the gas collection module comprises a barrel and a barrel cover arranged on the top of the barrel, the barrel cover is provided with a plug hole at a position corresponding to the inner wall of the barrel, and the plug hole corresponds to the partition, and the barrel side wall is provided with a vent hole, and the barrel cover is slidably provided with a sealing structure corresponding to the plug hole, and the partition is embedded in the plug hole and extends into the bottom of the gas collection module to close the vent hole, and when the partition is separated from the gas collection module, the sealing structure closes the plug hole. Before detecting the emission flux of harmful gases from soil around the pharmaceutical factory, a detection well is first drilled in the soil around the pharmaceutical factory by a drilling device, and the inner diameter of the detection well is slightly smaller than the outer diameter of the barrel of the gas collection module. Before placing the gas collection module into the detection well, open each socket and insert the partition into the socket of each gas collection module from top to bottom in turn, close the air holes on the side walls of each barrel, and then press the gas collection module into the detection well. Each gas collection module is in a different soil layer. Since the outer diameter of the barrel is slightly larger than the inner diameter of the detection well, and the side wall of the barrel is closed, the gap between the detection well and the barrel is eliminated as much as possible, ensuring that the gases collected by each barrel are separated from each other. After each barrel enters the detection well, the partition is pulled out of the gas collection module, and each barrel collects the gas emitted from different soil layers. A temperature sensor is provided in each barrel to detect the temperature change inside the barrel during the gas collection process. After the gas is collected, the gas sample is extracted from each barrel in turn through the sampling module. The gas sample enters the sampling port of the gas analysis module after passing through the gas intake module. The gas analysis module performs gas analysis on the gas sample to determine the type and content of harmful gases in the gas sample. Then the gas analysis module calculates the harmful gas emission flux based on the judgment result and the temperature information and size information of the barrel. Gas sampling and gas analysis are carried out alternately to analyze the harmful gas emission flux of each soil layer.

[0007] As a further optimization scheme of the present invention, the sealing structure includes a sealing plate, a guide member fixed to one edge of the sealing plate, and a position adjustment component for adjusting the sealing plate to close or open the socket, and a guide slope is provided on one side of the guide member.

[0008] As a further optimization scheme of the present invention, the barrel cover is provided with an assembly groove for accommodating the sealing plate, and limit blocks are provided on both sides of the assembly groove for making the sealing plate close to the assembly groove. The position adjustment component is an elastic reset component, and the elastic reset component is arranged between the guide component and the assembly groove.

[0009] As a further optimization solution of the present invention, a strip hole corresponding to the partition is opened on the bottom wall of the barrel body above the lowest gas collection module.

[0010] As a further optimization solution of the present invention, a clamping block is provided on the edge of the barrel cover, the clamping block is detachably connected to the barrel body, and a clamping groove corresponding to the clamping block is provided on the barrel body.

[0011] As a further optimization scheme of the present invention, the injection module includes a three-way valve arranged at the injection port of the gas analysis module, an air pump connected to one port of the three-way valve, a multi-way valve connected to the air inlet of the air pump, and an exhaust pipe arranged between the multi-way valve and the barrel body.

[0012] As a further optimization scheme of the present invention, the gas collecting module is provided with an air intake module corresponding one-to-one to the gas collection module. The air intake module is opened before the gas collecting module collects harmful gas, and the replacement gas is introduced into the gas collection module under the action of the injection module, and the air intake module is closed when the gas collecting module collects harmful gas.

[0013] As a further optimization solution of the present invention, the air intake module includes an air intake pipe connected to the barrel body, and a valve for opening or closing the air intake pipe.

[0014] As a further optimization solution of the present invention, a retractable air storage structure is provided between the air intake pipe and the valve.

[0015] As a further optimization solution of the present invention, a bulldozer component is provided at the bottom end of the barrel of the lowest gas collection module, and the bulldozer component is in an inverted cone shape.

[0016] The beneficial effects of the present invention are:

[0017] 1) Before placing the gas collection module into the detection well, the present invention inserts the partition into the jack of each gas collection module in turn, closes the air vent, and presses the gas collection module into the detection well. Each gas collection module is in a different soil layer. Since the outer diameter of the barrel body is slightly larger than the inner diameter of the detection well, and the side wall of the barrel body is closed, the side wall of the detection well can be compacted when the gas collection module is inserted, and the gap between the detection well and the barrel body is eliminated, ensuring that the gases collected by each barrel body are separated from each other, and can prevent the soil in the high soil layer from entering the low barrel body when the gas collection module is inserted. After the partition is pulled out, the jack is closed by the sealing mechanism to ensure that the gases collected by each barrel body are independent of each other, and can accurately reflect the pollution conditions of different soil layers;

[0018] 2) In addition to the sampling function, the sampling module of the present invention can also replace the gas in the barrel body and the sampling module before each gas collection, and can replace the gas in the gas path between the multi-way valve and the sampling port of the gas analysis module after the gas collection is completed. During the replacement process, the gas in the barrel body and the sampling module is discharged from the upper end of the three-way valve at the sampling port of the gas analysis module, which can avoid mutual interference between the detection of harmful gas emission fluxes in different time periods and mutual interference between the gases in different gas collection modules in the same time period, further improving the detection accuracy;

[0019] 3) The present invention is provided with a retractable gas storage structure between the air inlet pipe and the valve. When extracting the gas sample in the barrel body, the gas storage structure contracts under the action of negative pressure and its volume is reduced, which can avoid the gas pressure in the barrel body being too low and ensure that the air pump can smoothly replace the gas in the gas path between the multi-way valve and the three-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 It is a schematic diagram of the structure of the gas collection module of the present invention;

[0023] Figure 4 is an exploded view of the topmost gas collection module of the present invention;

[0024] Figure 5 It is a schematic diagram of the top barrel structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal structure of the bottom gas collection module of the present invention;

[0026] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0027] Figure 8 yes Figure 1 Enlarged view of point C in the middle;

[0028] Fig. 9 It is a schematic structural diagram of an air intake module according to another embodiment of the present invention.

[0029] In the figure: 1. gas analysis module; 2. sampling module; 3. gas collection module; 4. partition; 5. air intake module; 6. bulldozer component; 7. walking module; 8. limiter; 21. three-way valve; 22. air pump; 23. multi-way valve; 24. exhaust pipe; 31. barrel; 32. barrel cover; 33. jack; 34. air vent; 35. sealing structure; 36. assembly groove; 37. limiter block; 38. strip hole; 39. clamping block; 351. sealing plate; 352. guide member; 353. elastic reset member; 51. air intake pipe; 52. valve; 53. folding tube; 54. support frame; 55. guide rod; 71. chassis; 72. mounting frame. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Example

[0032] like Figure 1-4 As shown, the present embodiment relates to a soil harmful gas emission flux detection system around a pharmaceutical factory, comprising a gas analysis module 1, the sampling port of the gas analysis module 1 is connected to the sampling module 2, the sampling module 2 has a plurality of gas input ends, and the plurality of gas input ends are all connected to a gas collection module 3, and the plurality of gas collection modules 3 constitute a gas collection module. In the present embodiment, the number of the gas collection modules 3 of the gas collection module is three, and the gas collection module is used to collect harmful gases emitted from different soil layers around the pharmaceutical factory. The gas analysis module 1 is composed of a gas chromatograph and a processor. A partition 4 is inserted into the gas collecting module, and the gas collecting module 3 includes a barrel body 31 and a barrel cover 32 arranged on the top of the barrel body 31. A plug hole 33 is opened at a position corresponding to the inner wall of the barrel body 31 on the barrel cover 32, and the plug hole 33 corresponds to the partition 4. An air hole 34 is opened on the side wall of the barrel body 31, and a sealing structure 35 corresponding to the plug hole 33 is slidably provided on the barrel cover 32. When the partition 4 is embedded in the plug hole 33 and extends into the bottom of the gas collecting module, the air hole 34 is closed. When the partition 4 is separated from the gas collecting module, the sealing structure 35 closes the plug hole 33.

[0033] Before detecting the emission flux of harmful gases in the soil around the pharmaceutical factory, a detection well is first drilled in the soil around the pharmaceutical factory by a drilling device. The inner diameter of the detection well is slightly smaller than the outer diameter of the barrel body 31 of the gas collection module. Before placing the gas collection module into the detection well, it is necessary to confirm that the sealing structure 35 does not close the plug hole 33, and insert the partition 4 into the plug hole 33 of each gas collection module 3 from top to bottom in turn, and close the air vents 34 on the side wall of each barrel body 31. After that, the gas collection module is pressed into the detection well manually or by a lifting device. Each gas collection module 3 is in a different soil layer. A bulldozer component 6 is provided at the bottom end of the barrel body 31 of the lowest gas collection module 3, and the bulldozer component 6 is in an inverted cone shape. The bulldozer component 6 is used to compact the soil on the side wall of the detection well so that the gas collection module fits tightly with the side wall of the detection well. Since the outer diameter of the barrel body 31 is slightly larger than the inner diameter of the detection well and the side wall of the barrel body 31 is closed, the gap between the detection well and the barrel body 31 is eliminated as much as possible, ensuring that the gases collected by each barrel body 31 are separated from each other.

[0034] After each barrel 31 enters the detection well, the partition 4 is pulled out from the gas collection module, and each barrel 31 collects the gas emitted from different soil layers. Each barrel 31 is equipped with a temperature sensor T to detect the temperature change inside the barrel 31 during the gas collection process, and send the collected temperature information to the processor. The processor calculates the average temperature inside each barrel 31 during sampling based on the temperature information collected by the temperature sensor T. After a period of time, the gas collection is completed, and the gas sample is extracted from each barrel 31 in turn through the sampling module 2. The gas sample enters the sampling port of the gas analysis module 1 after passing through the sampling module 2. The gas analysis module 1 performs gas analysis on the gas sample to determine the type and content of harmful gases in the gas sample. After that, the gas analysis module 1 calculates the harmful gas emission flux based on the judgment result and the temperature information and size information of the barrel 31. The extraction of gas samples and gas analysis are performed alternately to analyze the harmful gas emission flux of each soil layer. The calculation formula for the harmful gas emission flux in the soil around the pharmaceutical factory is as follows:

[0035]

[0036] Wherein, F is the harmful gas emission flux of the soil layer where the barrel 31 is located, ρ is the density of the harmful gas under standard conditions, V is the volume of the barrel 31, S is the cross-sectional area of ​​the barrel 31, T AVG is the average temperature in the barrel 31 during sampling, △c is the change in the concentration of harmful gases during the gas collection process, and △t is the time consumed in the collection process. After the gas chromatograph of the gas analysis module 1 analyzes the gas sample, the harmful gas emission flux of the soil layer corresponding to the gas sample is calculated by the processor. The processor is connected to a timer. When the barrel 31 starts to collect gas, the operator starts the timer. The timer records the time when the gas sample in each barrel 31 is extracted to ensure that the processor can obtain the time information corresponding to the collection process.

[0037] Furthermore, if Figure 4 As shown, the sealing structure 35 includes a sealing plate 351, a guide member 352 fixed to one side edge of the sealing plate 351, and a position adjustment component for adjusting the sealing plate 351 to close or open the insertion hole 33, and a guide slope is provided on one side of the guide member 352. The barrel cover 32 is provided with a mounting groove 36 for accommodating the sealing plate 351, and two sides of the mounting groove 36 are provided with stop blocks 37 for making the sealing plate 351 close to the mounting groove 36. The stop blocks 37 are connected to the side wall of the mounting groove 36 through threaded fasteners. The position adjustment component is an elastic reset member 353, which is arranged between the guide member 352 and the mounting groove 36. The elastic reset member 353 is preferably a spring, one end of which is fixed to one side of the guide member 352, and the other end of the spring is inserted into the side wall of the mounting groove 36 away from the insertion hole 33. The bottom of the partition 4 is provided with a chamfer, and the position of the sealing structure 35 does not need to be confirmed before inserting the partition 4. When the partition 4 is inserted downward into the gas collecting module, the sealing plate 351 of the sealing structure 35 can be pushed away from the insertion hole 33. When the partition 4 is withdrawn from the gas collecting module, the spring pushes the sealing plate 351 through the guide member 352 to close the insertion hole 33. In addition, in some other embodiments, the position of the sealing structure 35 can be adjusted by setting a lever or a linear drive component on the sealing structure 35.

[0038] like Figure 5-7 As shown, in this embodiment, a strip hole 38 corresponding to the partition 4 is provided on the bottom wall of the barrel body 31 above the lowest gas collection module 3, ensuring that the partition 4 can pass through the barrel body 31 above, and the bottom of the bottom wall of the barrel body 31 is also provided with a receiving groove corresponding to the guide member 352, ensuring that the guide member 352 below the barrel body 31 can move linearly. In addition, in some other embodiments, the barrel body 31 may not be provided with a bottom wall, and accordingly, the strip hole 38 and the receiving groove do not need to be provided, but the structural stability of the barrel body 31 of the other embodiments is relatively poor. In addition, a clamping block 39 is provided on the edge of the barrel cover 32, and the clamping block 39 is detachably connected to the barrel body 31, and a clamping groove corresponding to the clamping block 39 is provided on the barrel body 31. The clamping block 39 is fixed in the clamping groove by a threaded fastener. The soil around the pharmaceutical factory may emit highly corrosive gases, so some gas collection modules 3 in the gas collection module may need to be replaced according to usage. The barrel body 31 and the limit block 37 in this embodiment can be separated from the barrel cover 32 to facilitate maintenance of the gas collection module.

[0039] Furthermore, if Figure 8As shown, the sampling module 2 includes a three-way valve 21 provided at the sampling port of the gas analysis module 1, an air pump 22 connected to one port of the three-way valve 21, a multi-way valve 23 connected to the air inlet of the air pump 22, and an air extraction pipe 24 provided between the multi-way valve 23 and the barrel 31, and the lower end of the air extraction pipe 24 is the gas input end of the sampling module 2. The gas collection module is provided with an air intake module 5 corresponding to the gas collection module 3 one by one, and the air intake module 5 is opened before the gas collection module collects harmful gases, and the replacement gas is introduced into the gas collection module 3 under the action of the sampling module 2, and the air intake module 5 is closed when the gas collection module collects harmful gases. The air intake module 5 includes an air intake pipe 51 connected to the barrel 31, and a valve 52 for opening or closing the air intake pipe 51, and the valve 52 is connected to a gas source, and the gas source is used to store the replacement gas, and the replacement gas is preferably nitrogen. In addition, the replacement gas can also be replaced with an inert gas.

[0040] Before the barrel 31 collects gas each time, it is necessary to replace the gas in the barrel 31 and the injection module 2. When it is necessary to replace the gas, the upper end of the three-way valve 21 is connected to the atmosphere, and the upper end of the three-way valve 21 is connected to the port connected to the air pump 22. The multi-way valve 23 connects the air extraction pipe 24 on each barrel 31 with the air pump 22 in turn, and the gas in each barrel 31 is extracted in turn through the air pump 22. When the gas in the barrel 31 is extracted by the air pump 22, the air intake module 5 corresponding to the barrel 31 is opened, that is, the corresponding valve 52 is opened, and the replacement gas in the gas source passes through the air intake pipe 51 to replace the gas in the barrel 31 and the injection module 2. After the gas in each barrel 31 is replaced in turn, the partition 4 in the gas collection module is pulled out to expose the air vent 34, so that the barrel 31 starts to collect gas. During the gas collection process, the multi-way valve 23 closes the gas path between the air pump 22 and each gas extraction pipe 24 , and the air intake module 5 is closed through the valve 52 .

[0041] After the gas collection is completed, the upper end of the three-way valve 21 is connected to the port connected to the air pump 22, and the multi-way valve 23 opens the air path between the air pump 22 and one of the air extraction pipes 24. The air pump 22 discharges the gas in the air path between the multi-way valve 23 and the three-way valve 21 to the outside of the three-way valve 21. Then, the lower end of the three-way valve 21 is connected to the port connected to the air pump 22, and the gas sample in the barrel 31 is extracted into the gas analysis module 1. According to the above process, the gas sample is extracted from each barrel 31 in turn, and the upper and lower ends of the three-way valve 21 are alternately connected to the port connected to the air pump 22. When the upper end of the three-way valve 21 is connected to the port connected to the air pump 22, the gas in the air path between the multi-way valve 23 and the three-way valve 21 can be replaced by the newly extracted gas sample to avoid mutual interference between gas samples of different soil layers.

[0042] In addition, the gas chromatograph of the gas analysis module 1 in this embodiment is arranged in the walking module 7, and the walking module 7 includes a chassis 71 and a mounting frame 72 fixed on the chassis 71, the air pump 22 is fixed on the top of the mounting frame 72, and the multi-way valve 23 is fixed on the side of the mounting frame 72. The air pump 22 is preferably a peristaltic pump. In order to improve the sealing effect of the partition 4 on the air vent 34, a limiter 8 is arranged inside the barrel 31, and the limiter 8 is preferably an L-shaped limiter plate. After the partition 4 is inserted, the partition 4 is clamped between the plurality of limiters, so that it can fit closely with the inner wall of the barrel 31.

[0043] In addition, if Fig. 9 As shown, in some other embodiments, a retractable gas storage structure is provided between the air inlet pipe 51 and the valve 52. The retractable gas storage structure is preferably a folding tube 53, a support frame 54 is provided on one side of the gas collection module, the folding tube 53 is fixedly arranged below the top wall of the support frame 54, guide rods 55 are provided on both sides of the support frame 54, the bottom of the folding tube 53 is slidably connected to the guide rod 55, and a convex ring is provided on the outer side of the bottom of the guide rod 55 to support the bottom of the folding tube 53. When extracting the gas sample in the barrel body 31, the folding tube 53 shrinks under the action of negative pressure, and the volume is reduced, which can avoid the air pressure in the barrel body 31 from being too low, and ensure that the air pump 22 can smoothly replace the gas in the gas path between the multi-way valve 23 and the three-way valve 21. In the case of setting the folding tube 53, V in the calculation formula of the harmful gas emission flux in the soil around the pharmaceutical factory is the sum of the volume of the barrel body 31 and the volume of the folding tube 53 in the initial state. In addition, in some other embodiments, in order to improve the accuracy of the calculation results, V in the calculation formula can be replaced by the sum of the internal gas space of the barrel body 31, the exhaust pipe 24 and the air intake module 5.

[0044] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A system for detecting harmful gas emission flux in soil around a pharmaceutical factory, comprising a gas analysis module (1), characterized in that: The sampling port of the gas analysis module (1) is connected to the sampling module (2), the sampling module (2) has a plurality of gas input ends, and the plurality of gas input ends are all connected to a gas collection module (3), the plurality of gas collection modules (3) form a gas collection module, and the gas collection module is used to collect harmful gases emitted from different soil layers around the pharmaceutical factory; A partition (4) is plugged into the gas collection module. The gas collection module (3) comprises a barrel body (31) and a barrel cover (32) arranged on the top of the barrel body (31). A plug hole (33) is provided at a position corresponding to the inner wall of the barrel body (31) on the barrel cover (32), and the plug hole (33) corresponds to the partition (4). An air vent (34) is provided on the side wall of the barrel body (31). A sealing structure (35) corresponding to the plug hole (33) is slidably provided on the barrel cover (32). When the partition (4) is embedded in the plug hole (33) and extends into the bottom of the gas collection module, the air vent (34) is closed. When the partition (4) is separated from the gas collection module, the sealing structure (35) closes the plug hole (33).

2. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 1, characterized in that: The sealing structure (35) comprises a sealing plate (351), a guide member (352) fixed to an edge of one side of the sealing plate (351), and a position adjustment component for adjusting the sealing plate (351) to close or open the insertion hole (33); a guide slope is provided on one side of the guide member (352).

3. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 2, characterized in that: The barrel cover (32) is provided with an assembly groove (36) for accommodating the sealing plate (351), and limit blocks (37) are provided on both sides of the assembly groove (36) for making the sealing plate (351) close to the assembly groove (36), and the position adjustment component is an elastic reset member (353), and the elastic reset member (353) is arranged between the guide member (352) and the assembly groove (36).

4. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 3, characterized in that: A strip-shaped hole (38) corresponding to the partition plate (4) is provided on the bottom wall of the barrel body (31) above the lowest gas collection module (3).

5. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 1, characterized in that: A clamping block (39) is provided on the edge of the barrel cover (32), the clamping block (39) is detachably connected to the barrel body (31), and a clamping groove corresponding to the clamping block (39) is provided on the barrel body (31).

6. The harmful gas emission flux detection system for soil around a pharmaceutical factory according to claim 1 is characterized by: The sampling module (2) comprises a three-way valve (21) arranged at the sampling port of the gas analysis module (1), an air pump (22) connected to one port of the three-way valve (21), a multi-way valve (23) connected to the air inlet of the air pump (22), and an air extraction pipe (24) arranged between the multi-way valve (23) and the barrel (31).

7. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 6, characterized in that: The gas collection module is provided with an air intake module (5) corresponding one-to-one to the gas collection module (3); the air intake module (5) is opened before the gas collection module collects harmful gases, and introduces replacement gas into the gas collection module (3) under the action of the sampling module (2).

8. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 7, characterized in that: The air intake module (5) comprises an air intake pipe (51) in communication with the barrel body (31), and a valve (52) for opening or closing the air intake pipe (51).

9. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 8, characterized in that: A retractable air storage structure is provided between the air intake pipe (51) and the valve (52).

10. The system for detecting harmful gas emission flux from soil around a pharmaceutical factory according to claim 1, characterized in that: A pusher component (6) is provided at the bottom end of the barrel body (31) of the lowest gas collection module (3), and the pusher component (6) is in an inverted cone shape.

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