A single-point multi-point sampling device and sampling method for acid-making flue gas

Abstract

The present invention provides a single-point, multi-point sampling device and sampling method for acid-making flue gas, comprising a filling body mounted on a walking unit, a filling assembly disposed within the filling body, a filling shell, a filling baffle fixedly connected to the inner wall of the filling shell, a plurality of filling installation ports for mounting sampling bottles on the surface of the filling baffle, a first filling chamber formed between the filling baffle and the inner wall of the filling shell, the filling assembly located within the first filling chamber, a control assembly for controlling the movement of the filling assembly disposed within the first filling chamber, the filling assembly comprising a filling mounting base, two filling branches mounted on the sidewalls of the filling mounting base, the two filling branches being connected to a sampling unit. The invention can automatically complete the filling of multiple sampling bottles with flue gas in a closed state, preventing flue gas from overflowing, reducing the impact on the environment, and improving sampling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling equipment, and in particular to a single-point multi-point sampling device and a sampling method for acid-making flue gas. Background Art

[0002] During the copper smelting process, sulfur dioxide gas is used to produce sulfuric acid. The sulfur dioxide flue gas is converted into sulfur trioxide through purification, demisting, drying and other processes to complete the acid production process. However, the flue gas contains a large amount of harmful impurities, such as arsenic, fluorine, acid mist, etc., which need to be sampled and tested to facilitate indicator control.

[0003] Traditional acid-making flue gas sampling includes single-point flue gas sampling and multi-point flue gas sampling, both of which require an air flow at the intake point in the flue gas duct to sample and analyze the flue gas; during the traditional flue gas sampling process, when multiple samples need to be collected, different sampling bottles need to be replaced manually or by machine. The replacement process is not only cumbersome and inefficient, but most importantly, harmful flue gas leakage is likely to occur during the replacement process. At the initial stage of sampling, the remaining gas in the air intake duct needs to be emptied. During this process, there is also the possibility of flue gas overflow, affecting the surrounding environment and the health of the staff; therefore, how to reduce the overflow of flue gas during the sampling process is a problem that needs to be solved. Summary of the Invention

[0004] In response to the above problems, the present invention provides a single-point multi-point sampling device and sampling method for acid-making flue gas. The invention can automatically complete the filling of flue gas into multiple sampling bottles in a closed state, avoid flue gas overflow, reduce the impact on the environment, and improve sampling efficiency.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] A single-point, multi-item sampling device for acid-making flue gas comprises a filling main body mounted on a walking unit, a filling assembly being arranged inside the filling main body, the filling main body comprising a filling shell, a filling baffle being fixedly connected to the inner wall of the filling shell, a plurality of filling mounting ports for mounting sampling bottles being provided on the surface of the filling baffle, a first filling chamber being formed between the filling baffle and the inner wall of the filling shell, the filling assembly being located in the first filling chamber, a control assembly for controlling the movement of the filling assembly being arranged in the first filling chamber, the filling assembly comprising a filling mounting base, two filling branches being mounted on the side wall of the filling mounting base, the two filling branches being connected to a sampling unit, the sampling unit comprising a sampling gun, the sampling gun comprising two sampling tubes arranged in parallel, the two sampling tubes being respectively connected to corresponding filling branches, the first sampling tube being connected in series with a pump body, and the second sampling tube being connected in series with a three-way assembly.

[0007] Preferably, the filling baffle is located in the middle of the filling shell, and a sealing door is rotatably connected to the inner wall of the filling shell. A second filling chamber is formed between the sealing door, the filling baffle and the filling shell.

[0008] Preferably, the control component includes a first control device, a second control device and a third control device, wherein the first control device controls the filling component to move linearly along the first direction, the second control device controls the filling component to move linearly along the second direction, and the third control device controls the filling component to move linearly along the third direction.

[0009] Preferably, the third control device includes a control base, a control chamber is opened on the inner wall of the control base, a control piston is sealingly and slidingly connected in the control chamber, a control rod fixed to the filling mounting base is fixedly connected to the side wall of the control piston, the control piston divides the control chamber into a first control chamber and a second control chamber, and the first control chamber is connected to a pumping device.

[0010] Preferably, the filling branch pipe includes a filling pipe housing, the inner wall of the filling pipe housing is fixedly connected with a filling air bag, the filling air bag is O-shaped and located at the edge of the filling pipe housing, and the filling air bag is connected to the second control chamber.

[0011] Preferably, a one-way valve is provided on the inner wall of the filling branch pipe, and the one-way valve is located inside the filling air bag.

[0012] Preferably, a circulation component located in the first filling chamber is installed on the side wall of the filling baffle, and the circulation component includes a circulation body, a first circulation air duct and a second circulation air duct. The circulation body includes a circulation shell, and the inner wall of the circulation shell is sealingly and slidingly connected to a control block, and the side wall of the control block is fixedly connected to a circulation branch pipe. Two circulation openings are opened on the inner wall of the control block, and the circulation openings are connected to the corresponding circulation branches. The control block has a first position and a second position, wherein when the control block is in the first position, the two circulation openings are connected; when the control block is in the second position, the first circulation opening is connected to the first circulation air duct, and the second circulation opening is connected to the second circulation air duct.

[0013] Preferably, the first circulating air duct is installed at the top end of the filling baffle, and the second circulating air duct is installed at the bottom end of the filling baffle.

[0014] A single-point multi-item sampling method for acid-making flue gas:

[0015] Step 1: Empty the residual gas: Insert the end of the sampling unit into the flue, control the three-way assembly to the first state and start the pump body to allow the flue gas to circulate for a predetermined time;

[0016] Step 2: Filling and sampling: After the flue gas in step 1 circulates for a predetermined time, the filling component is controlled by the control component to be in different positions, and the flue gas is filled into different sampling bottles in turn;

[0017] Step 3: Air circulation: After the smoke filling in step 2 is completed, the three-way assembly is controlled to be in the second state to allow the air to circulate for a predetermined time.

[0018] Preferably, during step one of exhausting the residual gas and step three of circulating the smoke, the filling assembly is located in the circulating body.

[0019] The beneficial effects of the present invention are:

[0020] 1. Two groups of sampling tubes are set, each of which is provided with a pump body and a three-way assembly. By controlling the three-way assembly to be in different states, the flue gas circulation and the air circulation can be completed respectively. The residual gas in the path is emptied by the flue gas circulation, which ensures the accuracy of the flue gas sampled and avoids the overflow of flue gas. The flue gas in the pipeline can be emptied by the air circulation, avoiding flue gas leakage and reducing the impact on the environment. The flue gas filling is carried out in a relatively closed first filling chamber. After the sampling bottle is stably inserted, the probability of flue gas leakage is low. A second filling chamber is provided outside the first filling chamber to further reduce the probability of flue gas leakage, further reduce the impact of acid-making flue gas on the environment, and also protect the health of the staff.

[0021] 2. The probability of smoke overflow can be further reduced by setting a combination of a filling air bag and a one-way valve. During the smoke filling process, the filling air bag can automatically expand and seal the end to prevent smoke overflow. By setting a one-way valve, after the filling component and the sampling bottle are staggered, the one-way valve is closed. At this time, the smoke cannot enter the first filling chamber through the second sampling pipe, and the pump body in the first sampling pipe can continue to work to empty the smoke that has overflowed around the filling branch pipe, further maintaining the smoke content environment in the first filling chamber and reducing the probability of smoke overflow.

[0022] 3. By setting up a circulation body, the smoke circulation path can be shortened and the probability of smoke overflow can be reduced. During the smoke circulation and air circulation process, the smoke can circulate in the circulation body to prevent the smoke from flowing in the first filling chamber. When the adjustment control block is in the second position, air can enter from the top and smoke can be discharged from the bottom, realizing gas circulation, purifying the first filling chamber, and preventing smoke overflow in subsequent work processes.

[0023] 4. The entire sampling device is simple and sophisticated. It is set on the walking unit for easy control and takes less time, shortening the sampling time from 6-8 hours to 1.5-2 hours. It also requires fewer people, reducing the sampling time from 2-3 people to 1 person. It can collect multiple data by one person alone when the flue gas is stable, greatly improving the efficiency of acid-making flue gas sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A side structural diagram of

[0026] Figure 3 This is a schematic diagram of the internal structure of the filling body of the present invention;

[0027] Figure 4 For the present invention Figure 3 AA line cross-sectional structural diagram;

[0028] Figure 5 For the present invention Figure 3 BB line cross-sectional structural diagram;

[0029] Figure 6 This is an enlarged structural diagram of point C of the present invention;

[0030] Figure 7 It is a schematic diagram of the enlarged structure of point D of the present invention.

[0031] In the figure: 1. Traveling unit; 2. Filling main body; 201. Filling shell; 202. Filling baffle; 2021. Filling installation port; 203. Sealing door; 3. Sampling unit; 4. Sampling bottle; 5. Filling assembly; 501. Filling installation base; 502. Filling branch pipe; 5021. Filling tube shell; 5022. One-way valve; 5023. Filling air bag; 6. Control assembly; 601. First control device; 602. Second control device; 603. Third control device; 6031. Control base; 6032. Control rod; 6033. Control piston; 701. First circulation air duct; 702. Second circulation air duct; 703. Circulation main body; 7031. Circulation shell; 7032. Control block; 7033. Circulation branch pipe. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Reference Figure 1-Figure 7A single-point multi-point sampling device for acid-making flue gas comprises a filling body 2 mounted on a walking unit 1, a filling assembly 5 is arranged inside the filling body 2, the filling body 2 comprises a filling shell 201, a filling baffle 202 is fixedly connected to the inner wall of the filling shell 201, a plurality of filling installation ports 2021 for installing sampling bottles 4 are opened on the surface of the filling baffle 202, a first filling chamber is formed between the filling baffle 202 and the inner wall of the filling shell 201, the filling installation ports 2021 are multiple and arranged in an array, and multiple sampling bottles 4 are filled at a time through the filling assembly 5. Flue gas is filled into the bottle 4 to complete multiple flue gas filling and sampling. A limiting hoop that is adapted to the size of the sampling bottle 4 is fixed at the filling installation port 2021. The sampling bottle 4 is inserted into the limiting hoop. After all the sampling bottles 4 are plugged in and closed, the first filling chamber is relatively closed. The filling component 5 is located in the first filling chamber, which avoids the problem of flue gas leakage during the filling connection process. A control component 6 for controlling the movement of the filling component 5 is provided in the first filling chamber. The control component 6 controls the filling component 5 to move to the side of different sampling bottles 4 to complete the flue gas filling.

[0034] Please refer to the attached Figure 7 The filling assembly 5 includes a filling mounting base 501, and two filling branches 502 are installed on the side wall of the filling mounting base 501. A connecting pipe corresponding to the two filling branches 502 is fixedly connected to the surface of the sampling bottle 4, and a one-way valve is arranged in the connecting pipe. When the filling branch pipe 502 is plugged into the connecting pipe, the one-way valve in the pipe is pushed open by an external force, and the flue gas enters the sampling bottle 4 from the first filling branch pipe 502, and the residual gas in the sampling bottle 4 is discharged from the second filling branch pipe 502. The residual gas in the sampling bottle 4 is discharged after a predetermined cycle time to realize the filling of the flue gas.

[0035] In addition, the two filling branches 502 are connected to the sampling unit 3, which includes a sampling gun. The sampling gun includes two sampling tubes arranged in parallel. The two sampling tubes are respectively connected to the corresponding filling branches 502. The main body of the first sampling tube is connected in series with a pump body, and the main body of the second sampling tube is connected in series with a three-way assembly. The two sampling tubes are formed in one piece. The sampling tube of the sampling unit 3 is inserted into the flue. At this time, the three-way assembly is controlled to be in the first conduction state. The flue gas can enter the filling branch 502 from the second sampling tube to complete the filling of the flue gas, and the excess gas can be discharged from the first sampling tube. Under the action of the pump body, the flue gas flows in a direction between the two sampling tubes to complete the flue gas filling process; the opening parts at the ends of the two sampling tubes are staggered by a certain distance to prevent the air in the initial circulation from flowing back into the filling assembly 5, thereby avoiding a decrease in sampling accuracy.

[0036] The filling baffle 202 is located in the middle position of the filling shell 201. The inner wall of the filling shell 201 is rotatably connected to a sealing door 203. A second filling chamber is formed between the sealing door 203, the filling baffle 202 and the filling shell 201. The sealing door 203 is closed during the filling process. A sealing gasket opposite to the sealing door 203 is provided on the inner wall of the filling shell 201. When the sampling bottle 4 is stably inserted, the first filling chamber is relatively sealed and smoke will not leak. Setting a second filling chamber can further improve the overall sealing performance, and low-concentration smoke will not leak into the second filling chamber, thereby reducing the probability of smoke leakage and reducing the impact on the environment.

[0037] For details, please refer to the attached Figure 3 , wherein the control component 6 includes a first control device 601, a second control device 602 and a third control device 603, wherein the first control device 601 controls the filling component 5 to move linearly in the vertical direction, the second control device 602 controls the filling component 5 to move linearly in the horizontal direction along the sampling bottle 4, and the third control device 603 controls the filling component 5 to move linearly in the direction close to or away from the sampling bottle 4, and controls the end filling component 5 to extend and retract to approach or move away from the sampling bottle 4 to complete the filling of the flue gas; the second control device 602 can be selected as a combination of an electric slide rail and an electric slider, and the third control device 603 is fixed to the side wall of the electric slider and can move synchronously with it; the first control device 601 can be selected as a combination of a screw rod and a guide rod, and the screw rod controls the up and down movement of the second control device 602 during the rotation process, and the screw rod has a built-in locking function to meet the work requirements.

[0038] Please refer to the attached Figure 7 ; The third control device 603 includes a control base 6031, and a control chamber is opened on the inner wall of the control base 6031. A control piston 6033 is sealed and slidably connected in the control chamber. The side wall of the control piston 6033 is fixedly connected to a control rod 6032 fixed to the filling installation base 501. The control piston 6033 divides the control chamber into a first control chamber and a second control chamber. The first control chamber is connected to a pumping device, and the control piston 6033 is connected to the inner wall of the second control chamber by a spring. When the pumping device pumps air into the first control chamber, it can push the control piston 6033 to move toward the outside, and the movement of the filling installation base 501 at the end can be controlled by the control rod 6032; and it can be quickly reset under the action of the spring, thereby accelerating the reset process.

[0039] The filling branch pipe 502 includes a filling tube housing 5021, and a filling air bag 5023 is fixedly connected to the inner wall of the filling tube housing 5021. The filling air bag 5023 is O-shaped and is located at the edge of the filling tube housing 5021. The filling air bag 5023 is connected to the second control chamber. When the control piston 6033 and the filling mounting base 501 move toward the outside, the space of the second control chamber is reduced, and the internal gas can be pumped into the filling air bag 5023 to control its expansion. The edge of the filling tube housing 5021 can be sealed by the filling air bag 5023 to prevent smoke leakage. It can be preferably set The end of the filling tube shell 5021 can be extended and retracted, and the filling airbag 5023 is fixed to the retractable inner wall. When the retractable end is against the surface of the sampling bottle 4, the filling airbag 5023 expands but does not press tightly against the outer wall of the connector pipe of the sampling bottle 4. When the main part of the filling tube shell 5021 continues to move toward the sampling bottle 4, the filling airbag 5023 continues to expand, and finally the filling airbag 5023 is sealed against the outer wall of the connector pipe in a static state, which can reduce the wear between the filling airbag 5023 and the outer wall of the connector pipe, and can further enhance the sealing effect, further avoiding smoke leakage.

[0040] A one-way valve 5022 is provided on the inner wall of the filling branch pipe 502. The one-way valve 5022 is located on the inner side of the filling airbag 5023. The one-way valve 5022 can be selected as a combination of a sealing ball and a spring. A touch rod is fixed on the side wall of the sealing ball. The touch rod can cooperate with the sealing ball in the joint pipe to control the two to open synchronously to realize the process of smoke filling. It should be noted here that one-way valves 5022 are provided in the two filling branch pipes 502. When the filling component 5 is separated from the sampling bottle 4, the one-way valves 5022 are closed. At this time, the smoke cannot enter the first filling chamber from the second sampling pipe. The pump body can generate negative pressure during operation, which can pull open the one-way valve 5022 in the first sampling pipe to open it. At this time, the pump air can timely remove part of the smoke leaked from the end of the filling branch pipe 502 and the surrounding area to avoid smoke leakage.

[0041] In order to quickly realize smoke circulation and air circulation and avoid smoke leakage in the first filling chamber, a circulation component located in the first filling chamber is installed on the side wall of the filling baffle 202, and the circulation component includes a circulation body 703, a first circulation air duct 701 and a second circulation air duct 702. The circulation body 703 includes a circulation shell 7031, and the inner wall of the circulation shell 7031 is sealed and slidably connected to the control block 7032, and the side wall of the control block 7032 is fixedly connected to the circulation branch 7033. The inner wall of the control block 7032 is provided with two circulation openings, and the circulation openings are connected to the corresponding circulation branch 7033. The control block 7032 has a first position and a second position, wherein when the control block 7032 is in the first position, the two circulation openings are connected; when the control block 7032 is in the second position, the first circulation opening is connected to the first circulation air duct 701, and the second circulation opening is connected to the second circulation air duct 702, wherein the control block 70 32 and the inner wall of the circulation shell 7031 are connected with a spring, and the force required to deform the spring is greater than the force to deform the spring in the one-way valve 5022. When the filling branch pipe 502 moves toward the circulation branch pipe 7033 of the circulation main body 703, the two first offset each other, and the spring in the one-way valve 5022 is squeezed and deformed, and the one-way valve 5022 opens. The circulation shell 7031 has a connecting port on the side wall at the first position of the control block 7032 for connecting the two circulation openings. At this time, the flue gas can circulate between the two circulation openings and the connecting port to prevent the flue gas from overflowing; in the process of air circulation, the control block 7032 is first in the first position. After the flue gas in the sampling tube and the filling branch pipe 502 is emptied, the filling branch pipe 502 and the circulation branch pipe 7033 are continued to be pushed to move, so that the control block 7032 is in the second position. At this time, the two circulation openings are respectively connected to the corresponding circulation air ducts to realize the circulation of air in the first filling chamber.

[0042] It is preferred to install the first circulation air duct 701 at the top of the filling baffle 202, and the second circulation air duct 702 at the bottom of the filling baffle 202. The density of the acid-making flue gas is greater than that of the air. The air enters from the first circulation air duct 701 at the top, and the flue gas is discharged from the second circulation air duct 702 at the bottom. The air circulates in the first filling chamber, which improves the efficiency of flue gas exhaust, the flue gas residue is extremely low, and the impact on the environment is minimal.

[0043] Reference Figure 1-Figure 7 , a single-point multi-item sampling method for acid-making flue gas;

[0044] Step 1: Empty the residual gas: Insert the end of the sampling unit into the flue, control the three-way assembly to be in the first state and start the pump body. At this time, the second sampling tube is connected to the flue and the filling branch pipe. At this time, a flue gas channel is formed between the two sampling tubes, the two filling branches and the first filling chamber, allowing the flue gas to circulate. Let the flue gas circulate for a predetermined time, empty the residual gas in the sampling tube, and then carry out flue gas filling sampling to ensure that the flue gas sampled in the sampling bottle is accurate and stable.

[0045] Step 2, filling and sampling: after the flue gas in step 1 circulates for a predetermined time, the filling component is controlled by the control component to be in different positions, and the flue gas filling is completed in turn for different sampling bottles; during the flue gas filling process, the first control device, the second control device and the third control device, in cooperation with the central controller, allow the filling component to gradually dock with multiple sampling bottles to complete the flue gas filling; it should be noted here that a plug is installed at the opening of the sampling bottle, and the plug part is connected to a connecting pipe corresponding to the two filling branches, and a one-way valve is provided in the pipe, at the connecting pipe and the filling branch interface, the flue gas circulation is controlled to circulate in the sampling bottle, so that the flue gas fills the sampling bottle and completes the flue gas filling.

[0046] Step 3, air circulation: After the flue gas filling in step 2 is completed, the three-way assembly is controlled to be in the second state. At this time, the second sampling tube is connected to the outside air. At this time, the pump body is continuously started to allow the air to circulate for a predetermined time. At this time, the air flow direction is consistent with the flue gas flow direction, that is, it enters the first filling chamber from the three-way assembly of the second sampling tube, and finally enters the second sampling tube, emptying the residual flue gas in the sampling pipeline and the filling chamber to avoid the impact of flue gas leakage on the environment and operators.

[0047] And when the residual gas is emptied and the flue gas is circulated, the filling assembly is located in the circulation main body. When the residual gas is emptied, the control block is in the first position, allowing the flue gas to flow between the two filling branches, allowing the flue gas in the filling branch to be emptied, and ensuring the stability and accuracy of the sampled flue gas; in the process of air circulation, the control block is first in the first position to empty the main flue gas in the filling branch, and then the control block is in the second position. At this time, the air can circulate in the filling branch and the first filling chamber, and the external air can enter from the top and be discharged from the bottom carrying the flue gas, and finally discharged into the flue gas pipe to avoid flue gas leakage affecting the environment and staff.

[0048] After a flue gas sampling is completed, the staff opens the sealed door and replaces multiple sampling bottles in turn to complete the subsequent flue gas sampling work.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A single-point multi-point sampling device for acid-making flue gas, comprising a filling body (2) mounted on a walking unit (1), wherein a filling assembly (5) is provided inside the filling body (2), characterized in that: The filling body (2) comprises a filling shell (201), the inner wall of the filling shell (201) is fixedly connected with a filling baffle (202), the surface of the filling baffle (202) is provided with a plurality of filling installation ports (2021) for installing sampling bottles (4), a first filling chamber is formed between the filling baffle (202) and the inner wall of the filling shell (201), the filling component (5) is located in the first filling chamber, and a control device for controlling the movement of the filling component (5) is provided in the first filling chamber. Component (6), the filling component (5) includes a filling installation base (501), two filling branches (502) are installed on the side wall of the filling installation base (501), the two filling branches (502) are connected to a sampling unit (3), the sampling unit (3) includes a sampling gun, the sampling gun includes two sampling tubes arranged in parallel, the two sampling tubes are respectively connected to the corresponding filling branches (502), the first sampling tube is connected in series with a pump body, and the second sampling tube is connected in series with a three-way component; A circulation assembly located in the first filling chamber is installed on the side wall of the filling baffle (202), the circulation assembly comprising a circulation body (703), a first circulation air duct (701), and a second circulation air duct (702), the circulation body (703) comprising a circulation shell (7031), the inner wall of the circulation shell (7031) being sealingly and slidingly connected to a control block (7032), the side wall of the control block (7032) being fixedly connected to a circulation branch pipe (7033), the inner wall of the control block (7032) being provided with two circulation openings, the circulation openings being connected to corresponding circulation branch pipes (7033), the control block (7032) having a first position and a second position, wherein when the control block (7032) is in the first position, the two circulation openings are connected; when the control block (7032) is in the second position, the first circulation opening is connected to the first circulation air duct (701), and the second circulation opening is connected to the second circulation air duct (702); When the filling branch pipe moves toward the circulation branch pipe of the circulation main body, the two offset each other.

2. The single-point multi-item sampling device for acid-making flue gas according to claim 1, characterized in that: The filling baffle (202) is located in the middle of the filling shell (201), and a sealing door (203) is rotatably connected to the inner wall of the filling shell (201), forming a second filling chamber between the sealing door (203), the filling baffle (202) and the filling shell (201).

3. The single-point multi-item sampling device for acid-making flue gas according to claim 1, characterized in that: The control component (6) comprises a first control device (601), a second control device (602) and a third control device (603), wherein the first control device (601) controls the filling component (5) to move linearly along a first direction, the second control device (602) controls the filling component (5) to move linearly along a second direction, and the third control device (603) controls the filling component (5) to move linearly along a third direction.

4. The single-point multi-point sampling device for acid-making flue gas according to claim 3, characterized in that: The third control device (603) includes a control base (6031), the inner wall of the control base (6031) is provided with a control chamber, a control piston (6033) is sealingly and slidably connected in the control chamber, a control rod (6032) fixed to the filling mounting base (501) is fixedly connected to the side wall of the control piston (6033), and the control piston (6033) divides the control chamber into a first control chamber and a second control chamber, and the first control chamber is connected to a pumping device.

5. The single-point multi-item sampling device for acid-making flue gas according to claim 4, characterized in that: The filling branch pipe (502) comprises a filling pipe housing (5021), the inner wall of which is fixedly connected a filling air bag (5023), the filling air bag (5023) being O-shaped and located at the edge of the filling pipe housing (5021), and the filling air bag (5023) being in communication with the second control chamber.

6. The single-point multi-item sampling device for acid-making flue gas according to claim 5, characterized in that: A one-way valve (5022) is provided on the inner wall of the filling branch pipe (502), and the one-way valve (5022) is located inside the filling air bag (5023).

7. The single-point multi-item sampling device for acid-making flue gas according to claim 1, characterized in that: The first circulation air duct (701) is installed at the top end of the filling baffle (202), and the second circulation air duct (702) is installed at the bottom end of the filling baffle (202).

8. A single-point multi-item sampling method for acid-making flue gas, characterized in that: Using the acid-making flue gas single-point multi-point sampling device according to any one of claims 1 to 7 comprises the following steps: Step 1: Empty the residual gas: Insert the end of the sampling unit into the flue, control the three-way assembly to the first state and start the pump body to allow the flue gas to circulate for a predetermined time; Step 2: Filling and sampling: After the flue gas in step 1 circulates for a predetermined time, the filling component is controlled by the control component to be in different positions, and the flue gas is filled into different sampling bottles in turn; Step 3: Air circulation: After the smoke filling in step 2 is completed, the three-way assembly is controlled to be in the second state to allow the air to circulate for a predetermined time.

9. The single-point multi-item sampling method for acid-making flue gas according to claim 8, characterized in that: During step one of exhausting the residual gas and step three of circulating the flue gas, the filling component is located in the circulation body.

Images