Integrated purification equipment and method for dust and acid gas in gas extraction pipeline

Abstract

An integrated purification device and method for dust and acidic gas in a gas extraction pipeline comprises: a cyclone-type primary dust collector, comprising a lower box, a conical cylinder, a primary dust collector air inlet duct, a cylinder, and a primary dust collector exhaust duct; a dust removal and explosion-proof integrated self-excited dust collector, comprising a liquid storage tank, a secondary dust collector air inlet duct, a secondary dust collector exhaust duct, a guide plate, and an explosion-proof throttle plate; a dust exhaust box; an induced draft fan; and a direct digital controller. The present invention can effectively remove dust and acidic, toxic, and harmful gases in the extracted gas, prevent corrosion of dust deposition pipelines and extraction pipelines, effectively avoid the transmission of explosions, and promptly depressurize the pipelines during explosions to avoid harm to surrounding workers.

Description

Technical Field

[0001] The present invention relates to a dust purification device in a gas pipeline, in particular to an integrated dust and acid gas purification device and method in a gas extraction pipeline, belonging to the technical field of gas extraction dust purification. Background Art

[0002] Mine gas extraction involves drilling holes into coal seams and gas accumulation areas during the mining process. These holes are then connected to dedicated gas transport pipelines, and gas extraction equipment is used to extract the gas from the coal seams and goaf to the surface for utilization or discharge. However, during the gas extraction process, the coal seams contain large amounts of dust and acidic, toxic, and harmful gases, which enter the extraction pipelines along with the extraction process. The extracted acidic, toxic, and harmful gases can corrode the extraction pipelines, reducing their service life. Furthermore, dust can clog the pipelines, posing safety risks such as dust explosions or gas accumulation explosions, threatening the safety of surrounding mine workers. Furthermore, the emission of dust and other harmful gases can pollute the atmosphere. During the gas extraction process, friction between the gas and the pipelines can easily generate static electricity, posing a risk of gas explosions in the event of high concentrations of gas. Therefore, explosion-proof devices should be installed during the gas extraction process.

[0003] At present, based on the actual situation of existing gas extraction mines, coal mining enterprises only use a single water-sealed explosion-proof device, which has the following shortcomings: (1) The explosion-proof device is large and heavy, and is difficult to move with the progress of gas extraction; (2) The explosion-proof device has a single function and cannot remove the dust and acidic toxic and harmful gases carried in the extracted gas, causing blockage of the extraction pipeline and the occurrence of gas or dust explosions and other dangers; (3) The existing water-sealed explosion-proof device is easy to combine with the acidic toxic and harmful gases in the extraction process, forming corrosive acid, which corrodes the extraction pipeline. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated purification device and method for dust and acidic gases in gas extraction pipelines, which can effectively remove dust and acidic toxic and harmful gases in the extracted gas, prevent dust deposition pipelines and corrosion of extraction pipelines, effectively avoid the transmission of explosions, and promptly relieve the pressure of the pipelines in the event of explosions to avoid harm to surrounding workers.

[0005] In order to achieve the above-mentioned object, the present invention provides an integrated purification device for dust and acid gas in a gas extraction pipeline, comprising a cyclone-type primary dust collector, comprising a lower box body, a conical cylinder, a primary dust collector air inlet pipe, a cylinder and a primary dust collector exhaust pipe; the cylinder and the primary dust collector exhaust pipe are fixed inside the lower box body; the cylinder is located outside the primary dust collector exhaust pipe, and the axes of the cylinder and the primary dust collector exhaust pipe coincide with each other; the upper end of the primary dust collector exhaust pipe extends to the upper part of the lower box body; the primary dust collector air inlet pipe is fixed on the lower box body, one end extends to the outside of the lower box body, and the other end extends to the inside of the cylinder, and a gap is provided between the outer side surfaces of the primary dust collector air inlet pipe and the primary dust collector exhaust pipe; the axis of the primary dust collector air inlet pipe and the axis of the primary dust collector exhaust pipe are perpendicular to each other in space; the conical cylinder is fixed to the bottom of the cylinder; the axes of the conical cylinder and the cylinder coincide with each other; the bottom of the conical cylinder is provided with an opening;

[0006] The dust removal and explosion-proof integrated self-excited dust collector comprises a liquid storage tank, a secondary dust collector air intake duct, a secondary dust collector exhaust duct, a guide plate, and an explosion-proof throttle plate; the liquid storage tank is fixed to the upper part of the lower box body; the secondary dust collector air intake duct is fixed to the liquid storage tank and is connected to the primary dust collector exhaust duct; an opening is provided at the upper end of the secondary dust collector air intake duct; the upper end of the guide plate is fixed to the lower side of the opening of the secondary dust collector air intake duct; the upper end of the explosion-proof throttle plate is hinged to the upper side of the opening of the secondary dust collector air intake duct; the lower ends of the guide plate and the explosion-proof throttle plate both extend obliquely toward the lower part of the liquid storage tank;

[0007] The dust exhaust box is installed in the lower box body; the opening at the bottom of the cone cylinder is inserted into the dust exhaust box;

[0008] An induced draft fan is installed at the upper end of the liquid storage tank, with an air inlet connected to the liquid storage tank and an air outlet connected to the exhaust duct of the secondary dust collector;

[0009] The direct digital controller is installed on the liquid storage tank and is electrically connected to the induced draft fan.

[0010] Preferably, the cyclone-type primary dust collector also includes a hydrogen sulfide concentration sensor and multiple dust concentration sensors; the hydrogen sulfide concentration sensor is installed on the air inlet duct of the primary dust collector; multiple dust concentration sensors are dispersedly installed on the air inlet duct of the primary dust collector and the air inlet duct of the secondary dust collector; the hydrogen sulfide concentration sensor and the dust concentration sensor are electrically connected to the direct digital controller respectively.

[0011] Preferably, the diameter of the cone gradually decreases from top to bottom.

[0012] Preferably, the liquid storage tank is provided with an overflow port and a sewage outlet.

[0013] Preferably, the dust removal and explosion-proof integrated self-excited dust collector also includes an electromagnetic valve and a liquid storage bottle; the liquid storage bottle is fixed on one side of the liquid storage tank and is connected to the liquid storage tank through a pipe; the electromagnetic valve is installed on the pipe between the liquid storage bottle and the liquid storage tank.

[0014] Preferably, a torsion spring is installed on the explosion-proof throttle plate; one end of the torsion spring is connected to the explosion-proof throttle plate, and the other end is connected to the air inlet pipe of the secondary dust collector.

[0015] Preferably, an explosion-proof pressure relief valve is provided on the side of the liquid storage tank; a dehydration plate is installed on the inner wall of the liquid storage tank; one end of the dehydration plate is fixed on the liquid storage tank, and the other end extends toward the direction of the secondary dust collector air inlet pipe.

[0016] Preferably, the dust removal and explosion-proof integrated self-excited dust collector further includes a corrugated demister plate; one end of the corrugated demister plate is connected to the liquid storage tank, and the other end is connected to the air inlet of the induced draft fan.

[0017] Preferably, a signal transceiver is installed on the direct digital controller; a door magnetic sensor is provided on the explosion-proof pressure relief valve; a buzzer is provided inside the direct digital controller; the signal transceiver and the door magnetic sensor are electrically connected to the direct digital controller respectively.

[0018] An integrated method for purifying dust and acid gas in a gas extraction pipeline comprises the following steps:

[0019] S1. A method for adjusting the concentration ratio of the scrubbing liquid and regularly replenishing the scrubbing liquid, comprising the following steps:

[0020] S11: The hydrogen sulfide concentration sensor is installed at the air inlet duct of the primary dust collector. It records a data every five minutes as a cycle. The data recorded in the nth cycle for half an hour are HS n (0), HS n (1) HS n (2) HS n (3) HS n (4) and HS n (5) Each set of data is sent to the direct digital controller at regular intervals. Since hydrogen sulfide gas has a linear relationship with gas extraction, the direct digital controller at the top uses the quadratic exponential sliding average method to calculate the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector according to formula (1) and predict the hydrogen sulfide concentration entering the dust removal and explosion-proof integrated self-excited dust collector in the next few cycles:

[0021]

[0022] Where: is the predicted value of the t+Tth period;

[0023] a t 、b t is the smoothing coefficient;

[0024] are the first exponential smoothing value and the second exponential smoothing value of period t respectively;

[0025] α is the weighting coefficient;

[0026] Among them, the exponential smoothing value of the t period in formula (1) is and the quadratic exponential smoothing value of period t Calculated by formula (2):

[0027]

[0028] The weighting coefficient α is determined based on the periodic changes of the data. When the data series shows a stable trend over time, the weighting coefficient α takes a smaller value of 0.2. When the data series fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.4. When the data series shows an upward or downward trend over time, the weighting coefficient α takes a larger value of 0.7.

[0029] Where: HS t is the initial value of hydrogen sulfide gas in period t; is the exponential smoothing value of the t-1th period, and are the first exponential smoothing value and the second exponential smoothing value of the first period respectively;

[0030] S12: The direct digital controller calculates the content of hydrogen sulfide entering the dust removal and explosion-proof integrated self-excited dust collector in half an hour according to formula (3):

[0031]

[0032] Where: G1 is the first group of hydrogen sulfide content recorded by the direct digital controller;

[0033] P is the power of the induced draft fan;

[0034] η J ,η C are respectively the fan efficiency and mechanical transmission efficiency of the induced draft fan;

[0035] f is the static pressure of the induced draft fan;

[0036] is the predicted value of the t+Tth period, that is, the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector during the predicted period;

[0037] S13: According to the reaction equation (4) between the scrubbing liquid and the hydrogen sulfide gas in the gas, the required concentration ratio of the scrubbing liquid is calculated, and then the electromagnetic valves under the liquid storage bottles on both sides of the dust removal and explosion-proof integrated self-excited dust collector are adjusted according to the formula (5) to change the concentration of the scrubbing liquid;

[0038] D+H2S→KS+G (4);

[0039] Where: D is KXL-Ⅱ mining hydrogen sulfide absorbent;

[0040] KS and G are reactive survival substances;

[0041]

[0042] Where: G n The hydrogen sulfide content of the nth group of cycles recorded by the direct digital controller;

[0043] G n+1 The hydrogen sulfide content of the n+1th group of cycles recorded by the direct digital controller;

[0044] S2. A method for adjusting the frequency conversion of an induced draft fan by monitoring the dust concentration through a dust concentration sensor comprises the following steps:

[0045] S21: The dust concentration sensor installed at the primary dust collector inlet duct and the secondary dust collector inlet duct records one data every five minutes, and two sets of data are recorded every half an hour. The data recorded by the dust concentration sensor on the right side of the primary dust collector inlet duct are F 01 、F 02 、F 03 、F 04 、F 05 and F 06 ,The dust concentration sensor located in the air inlet channel of the secondary dust collector records the data of F 11 、F 12 、F 13 、F 14 、F 15 and F 16 , each set of recorded data is sent to the direct digital controller on the top of the equipment. The direct digital controller calculates the maximum concentration of each group of dust gas entering the dust removal and explosion-proof integrated self-excited dust collector according to formula (6):

[0046]

[0047] S22: The direct digital controller adjusts the frequency of the induced draft fan according to the threshold value set by formula (7);

[0048]

[0049] Where: F 0max The maximum concentration of dust entering the air intake duct of the primary dust collector within half an hour;

[0050] F 1max The maximum concentration of dust entering the air intake duct of the secondary dust collector within half an hour;

[0051] θ min ,θ med and θ max They are the three thresholds of the dust concentration sensor set in the air inlet duct of the primary dust collector;

[0052] μ max The threshold value of the dust concentration sensor set in the air inlet duct of the secondary dust collector;

[0053] S3. The explosion alarm method of the dust removal and explosion-proof integrated self-excited dust collector is convenient for the staff to check the status of the equipment and pipelines in time after the explosion, including the following steps:

[0054] S31: Set the magnetic attraction force of the explosion-proof pressure relief valve; the torsional stress of the torsion spring in the explosion-proof throttle plate should be less than the impact force released by the minimum concentration of methane explosion, and the minimum magnetic attraction force of the explosion-proof pressure relief valve should be less than the impact force released by the minimum concentration of methane explosion. The explosion impact force is calculated according to the ideal minimum explosion concentration of gas 5%, calculated by formula (8):

[0055]

[0056] Where: p is the absolute pressure of the gas in the container;

[0057] V is the volume of the container;

[0058] K is the adiabatic index of the gas, and the adiabatic index of gas is approximately K=1.316;

[0059] S is the area of ​​the explosion-proof throttle plate;

[0060] F is the magnetic attraction force of the explosion-proof pressure relief valve;

[0061] S32: The magnetic explosion-proof pressure relief valve is equipped with a door magnetic sensor. When an explosion occurs, the explosion-proof pressure relief valve opens under the impact of the explosion, and the transmitter of the door magnetic sensor separates from the magnetic strip. The transmitter immediately sends an alarm signal and transmits it to the direct digital controller.

[0062] S33: The direct digital controller receives the alarm signal from the transmitter part of the door magnetic sensor and controls the buzzer inside the direct digital controller to generate an alarm prompt sound, prompting the staff that an explosion has occurred in the dust removal and explosion-proof integrated self-excited dust collector, so that the equipment operator can check the operating status of the dust removal and explosion-proof integrated self-excited dust collector and the extraction pipeline in time.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] Efficient dust removal and gas purification: This equipment combines a cyclone-type primary dust collector with a self-excited dust collector with integrated dust removal and explosion protection to effectively remove dust and acidic, toxic, and harmful gases carried during gas extraction. The cyclone-type primary dust collector uses centrifugal force to separate larger dust particles, while the secondary dust collector further filters out fine dust particles and removes acidic components from the gas through liquid scrubbing. This prevents dust from clogging the pipeline and acidic gas corrosion, thereby extending the pipeline's service life.

[0065] Improved explosion safety: The equipment's explosion-proof throttle plate and explosion-proof pressure relief valve effectively prevent the risk of gas accumulation and dust explosions. When gas or dust concentrations reach dangerous levels, the throttle plate automatically closes, restricting gas flow and preventing the spread of the explosion. Furthermore, the liquid in the storage tank further reduces the accumulation of static electricity, reducing the risk of explosions caused by static electricity generated by friction between gas and pipelines during gas extraction.

[0066] Compact and convenient: Compared with existing water-sealed explosion-proof devices, this device is compact and lightweight, making it easy to move and install during gas extraction operations, greatly improving its adaptability. In particular, the automatic adjustment system for the liquid storage bottle and solenoid valve allows for flexible control of the purification process based on actual needs, enhancing the device's practicality and ease of operation.

[0067] Environmental Benefits: By efficiently treating dust and acid gases, this equipment significantly reduces harmful emissions and mitigates the risk of air pollution, meeting the increasing environmental demands of coal mining companies. Furthermore, the equipment design focuses on minimizing scrubber fluid consumption, further reducing operating costs.

[0068] Strong comprehensive processing capabilities: This equipment not only simultaneously processes dust and acid gases during gas extraction but also offers explosion-proof capabilities, resolving the single-function issue of existing equipment and reducing the multiple safety hazards associated with inadequate functionality. Its integrated design significantly improves the safety and efficiency of the gas extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a structural schematic diagram of the present invention;

[0070] Figure 2 Schematic diagram of the structure of the explosion-proof throttle plate in the present invention;

[0071] Figure 3 It is a structural diagram of the explosion-proof pressure relief valve of the present invention;

[0072] Figure 4 It is a circuit principle block diagram of the present invention;

[0073] In the figure: 1. Primary dust collector air inlet duct, 2. Hydrogen sulfide concentration sensor, 3. Dust concentration sensor, 4. Dust exhaust box, 5. Conical cylinder, 6. Cylinder, 7. Primary dust collector exhaust duct, 8. Sewage outlet, 9. Overflow outlet, 10. Secondary dust collector air inlet duct, 11. Guide plate, 12. Explosion-proof throttle plate, 13. Liquid storage tank, 14. Solenoid valve, 15. Liquid storage bottle, 16. Dehydration plate, 17. Explosion-proof pressure relief valve, 18. Corrugated defogger plate, 19. Direct digital controller, 20. Secondary dust collector exhaust duct, 21. Signal transceiver, 22. Frequency converter, 23. Draft fan, 24. Torsion spring, 25. Door magnetic sensor. DETAILED DESCRIPTION

[0074] The present invention will be further described below with reference to the accompanying drawings.

[0075] like Figure 1 and Figure 4 As shown, an integrated purification device for dust and acid gas in a gas extraction pipeline comprises:

[0076] The cyclone-type primary dust collector comprises a lower box body, a conical cylinder 5, a primary dust collector air inlet duct 1, a cylinder 6 and a primary dust collector exhaust duct 7; the cylinder 6 and the primary dust collector exhaust duct 7 are fixed inside the lower box body; the cylinder 6 is located outside the primary dust collector exhaust duct 7, and the axes of the cylinder 6 and the primary dust collector exhaust duct 7 coincide with each other; the upper end of the primary dust collector exhaust duct 7 extends to the upper part of the lower box body; the primary dust collector air inlet duct 1 is fixed on the lower box body, one end extends to the outside of the lower box body, and the other end extends to the inside of the cylinder 6, and a gap is provided between the outer side surfaces of the primary dust collector air inlet duct 1 and the primary dust collector exhaust duct 7; the axis of the primary dust collector air inlet duct 1 and the axis of the primary dust collector exhaust duct 7 are perpendicular to each other in space; the conical cylinder 5 is fixed at the bottom of the cylinder 6; the axes of the conical cylinder 5 and the cylinder 6 coincide with each other; an opening is provided at the bottom of the conical cylinder 5.

[0077] This equipment's cyclone-type primary dust collector effectively captures coarse dust particles flowing through the pipeline through centrifugal force, reducing the load on subsequent equipment and reducing the presence of large particles in the airflow. As the airflow enters the cyclone-type primary dust collector, it rotates due to its tangential entry. This centrifugal force throws the dust toward the inner wall of cylinder 6, ultimately passing through the opening at the bottom of cone 5 and into dust box 4.

[0078] The dust removal and explosion-proof integrated self-excited dust collector includes a liquid storage tank 13, a secondary dust collector air intake duct 10, a secondary dust collector exhaust duct 20, a guide plate 11, and an explosion-proof throttle plate 12; the liquid storage tank 13 is fixed to the upper part of the lower box body; the secondary dust collector air intake duct 10 is fixed on the liquid storage tank 13 and is connected to the primary dust collector exhaust duct 7; the upper end of the secondary dust collector air intake duct 10 is provided with an opening; the upper end of the guide plate 11 is fixed to the lower side of the opening of the secondary dust collector air intake duct 10; the upper end of the explosion-proof throttle plate 12 is hinged to the upper side of the opening of the secondary dust collector air intake duct 10; the lower ends of the guide plate 11 and the explosion-proof throttle plate 12 both extend obliquely toward the lower part of the liquid storage tank 13. The liquid storage tank 13 is combined with the explosion-proof throttle plate 12 and the guide plate 11 to form a secondary dust removal and air washing device, which removes dust below 5μm and corrosive acidic toxic and harmful gases in the extracted gas through the capture group stirred up by the airflow (liquid level difference, impact water curtain, shear droplets, suction bubbles, etc.).

[0079] The device's integrated, self-excited dust collector not only efficiently separates residual dust from the gas but also provides explosion protection. The deflector 11 redirects the airflow by deflecting it, allowing larger dust particles to separate and settle to the bottom of the liquid storage tank 13. The explosion-proof throttle plate 12 increases the airflow velocity and the contact area between the gas and the liquid by reducing the flow area, thereby improving the removal efficiency of dust and acidic gases. If an explosion occurs within the system, the explosion-proof throttle plate 12 closes promptly, preventing the spread of explosive gases and ensuring the safety of the equipment and operators.

[0080] The dust box 4 is installed in the lower box body, and the opening at the bottom of the cone 5 is inserted into the dust box 4 to collect the dust discharged by the dust collector. A sealing valve is provided to regularly clean the dust accumulated in the dust box 4.

[0081] The design of the dust box 4 helps to collect the dust separated from the cyclone primary dust collector, prevents the dust from flowing back into the air flow, and provides a design that is easy to clean, thereby improving the maintenance efficiency of the equipment.

[0082] An induced draft fan (23) is mounted above the liquid storage tank (13), with its air inlet connected to the tank and its outlet connected to the secondary dust collector exhaust duct (20). An inverter (22) is incorporated into the induced draft fan (23), which uses signals from a direct digital controller (19) to adjust the wind speed in real time, thereby improving the dust removal efficiency of the equipment.

[0083] The induced draft fan 23 provides continuous power, ensuring smooth gas flow, thereby improving the processing efficiency of the entire system. The rational placement of the induced draft fan 23 prevents damage to the blades of the induced draft fan 23 caused by the mixing of dust and gas, thus extending the service life of the equipment.

[0084] The direct digital controller (DDC) 19 is mounted on the liquid storage tank 13 and electrically connected to the induced draft fan (IDF) 23. The DDC 19 uses a computer to detect the controlled parameters, calculate them based on set values ​​and a control algorithm, and then outputs the results to the actuators to control the equipment, stabilizing the controlled parameters at their given values. The DDC 19 receives signals from the hydrogen sulfide concentration sensor 2 and the dust concentration sensor 3, calculates them using a control algorithm, and transmits the output signals to the inverter 22 of the IDF 23 and the solenoid valve 14 connected to the bottom of the liquid storage tank 15, thereby controlling the dust removal air volume and the concentration of the scrubbing liquid.

[0085] In this technical solution, the hydrogen sulfide concentration sensor 2 and the dust concentration sensor 3 installed at the primary dust collector inlet duct 1 are used for real-time monitoring. A data point is recorded every five minutes, and the data changes are continuously recorded within half an hour. The data recorded by the dust concentration sensor 3 on the right side of the inlet duct are F 01 、F 02 、F 03 、F 04 、F 05 and F 06 The data recorded by the hydrogen sulfide concentration sensor 2 on the left side of the intake pipe within half an hour of the nth cycle are HS n (0), HS n (1) HS n (2) HS n (3) HS n (4) and HS n (5) is sent to the direct digital controller 19 at the top of the device in real time through the signal transmitter. The dust concentration sensor 3 located in the air inlet duct 10 of the secondary dust collector records the data F 11 、F 12 、F 13 、F 14 、F 15 and F 16 , and regularly sends it to the direct digital controller 19 on the top of the equipment; the liquid storage bottles 15 located on both sides of the explosion-proof device receive signals from the data control system, control the electromagnetic valve 14 installed at the bottom of the liquid storage bottle 15, quantitatively adjust the ratio of the scrubbing liquid, and replenish the scrubbing liquid into the liquid storage tank 13.

[0086] The equipment's interior is coated with chemical copper plating, firmly adsorbing the protective layer onto the surface and effectively preventing corrosion from the acidic, toxic, and harmful gases in the gas. All pipelines undergo anti-static treatment, including the installation of automatic grounding devices, anti-static sleeves, and proper grounding methods.

[0087] The cylinder 6 and the cone 5 are sprayed with an anti-adsorption coating, which can effectively prevent dust from being adsorbed on the container wall, avoid dust accumulation inside the dust collector, and avoid cleaning work inside the cyclone primary dust collector.

[0088] In this embodiment, the cyclone primary dust collector also includes a hydrogen sulfide concentration sensor 2 and multiple dust concentration sensors 3; the hydrogen sulfide concentration sensor 2 is installed on the primary dust collector air intake duct 1; multiple dust concentration sensors 3 are installed on the primary dust collector exhaust duct 7; the hydrogen sulfide concentration sensor 2 and the dust concentration sensor 3 are electrically connected to the direct digital controller 19 respectively; the hydrogen sulfide concentration sensor 2 and the multiple dust concentration sensors 3 are used to monitor the hydrogen sulfide and dust concentrations in the air intake duct. The cyclone dust collector uses centrifugal force to separate dust particles from the air flow and capture them on the wall of the device, and then uses gravity to make the dust particles fall into the ash hopper. The cyclone primary dust collector is used to remove particles larger than 5μm, and has a high dust removal efficiency.

[0089] The system's hydrogen sulfide concentration sensor 2 and dust concentration sensor 3 monitor gas composition in real time, effectively identifying the hydrogen sulfide content and dust concentration in the gas, ensuring safe operation of the equipment even in harsh conditions. A direct digital controller 19 automatically adjusts the concentration of the scrubbing liquid in the liquid storage tank 13 based on sensor feedback, further enhancing gas purification effectiveness.

[0090] In this embodiment, the diameter of the conical cylinder 5 gradually decreases from top to bottom.

[0091] This design further enhances the separation effect of the cyclone-type primary dust collector, so that the dust in the airflow gradually sinks during the rotation process and is eventually discharged from the bottom of the cone 5.

[0092] In this embodiment, the liquid storage tank 13 is provided with an overflow port 9 and a sewage outlet 8. The overflow port 9 prevents the scrubbing liquid from exceeding the limit and affecting the formation of the water curtain, and prevents the scrubbing liquid from exceeding the bottom end of the explosion-proof throttle plate 12 and affecting the dust removal effect.

[0093] The overflow port 9 and drain port 8 design of the liquid storage tank 13 ensure stable control of the liquid during long-term operation of the equipment, avoid overfilling or clogging of the liquid storage tank 13, and thus ensure long-term stable operation of the system.

[0094] In this embodiment, the dust removal and explosion-proof integrated self-excited dust collector also includes an electromagnetic valve 14 and a liquid storage bottle 15; the liquid storage bottle 15 is fixed on one side of the liquid storage tank 13 and is connected to the liquid storage tank 13 through a pipe; the electromagnetic valve 14 is installed on the pipe between the liquid storage bottle 15 and the liquid storage tank 13.

[0095] The design of the liquid storage bottle 15 and the electromagnetic valve 14 improves the automation level of the system and can automatically adjust the flow rate and concentration of the scrubbing liquid according to the change of dust concentration, thereby ensuring the gas purification effect while reducing the consumption of the scrubbing liquid.

[0096] In this embodiment, two liquid storage bottles 15 and corresponding electromagnetic valves 14 are configured, respectively installed on the left and right sides of the liquid storage tank 13. The liquid storage bottle 15 is made of glass fiber reinforced plastic material, which can clearly observe the liquid level and the operator can replenish the gas washing liquid in time.

[0097] This design ensures the symmetry and stability of the equipment, helping the system maintain efficient and stable operation under higher loads.

[0098] In this embodiment, a torsion spring 24 is mounted on the explosion-proof throttle plate 12; one end of the torsion spring 24 is connected to the explosion-proof throttle plate 12, and the other end is connected to the secondary dust collector's air inlet duct 10. During normal operation, the explosion-proof throttle plate 12 accelerates the airflow and adjusts the liquid curtain filling level within the dust collection chamber. In the event of an explosion, the explosion shockwave causes the explosion-proof throttle plate 12 to momentarily rotate downward, contacting the scrubbing liquid surface and forming a liquid seal, preventing the explosion flame from propagating and thereby preventing the explosion from spreading.

[0099] When an explosion occurs, the torsion spring 24 is designed to quickly close the explosion-proof throttle plate 12 to prevent the spread of explosive gas and ensure the safety of equipment and operators.

[0100] In this embodiment, an explosion-proof pressure relief valve 17 is provided on the side of the liquid storage tank 13; a dehydration plate 16 is mounted on the inner wall of the liquid storage tank 13; one end of the dehydration plate 16 is fixed to the liquid storage tank 13, and the other end extends toward the secondary dust collector air inlet duct 10. The dehydration plate 16 is connected to the explosion-proof pressure relief valve via a common rotating shaft and a connecting bracket. The explosion-proof pressure relief valve is magnetic. When an explosion occurs, the impact force generated by the explosion on the dehydration plate 16 drives the connected magnetic explosion-proof pressure relief valve to rotate outward. The explosive force is far greater than the magnetic attraction, and the magnetic valve opens, thereby releasing the pressure in the explosion-proof chamber, preventing the transmission of the explosion impact force and providing explosion-proof pressure relief for the gas extraction pipeline.

[0101] The explosion-proof pressure relief valve 17 automatically opens when the internal pressure is too high, quickly releasing excess pressure to prevent damage to the equipment. The dehydration plate 16 is designed to effectively remove moisture from the air flow, preventing excessive moisture from affecting the purification effect of the air flow.

[0102] In this embodiment, the dust removal and explosion-proof integrated self-excited dust collector further includes a corrugated demister plate 18 ; one end of the corrugated demister plate 18 is connected to the liquid storage tank 13 , and the other end is connected to the air inlet of the induced draft fan 23 .

[0103] The corrugated demister plate 18 can effectively remove residual water droplets in the gas through multiple deflection designs, ensuring that the discharged gas is dry and clean.

[0104] In this embodiment, a signal transceiver 21 is installed on the direct digital controller 19; a door magnetic sensor 25 is provided on the explosion-proof pressure relief valve 17; a buzzer is provided inside the direct digital controller 19; the signal transceiver 21 and the door magnetic sensor 25 are electrically connected to the direct digital controller 19 respectively.

[0105] The design of the signal transceiver 21 and the door magnetic sensor 25 realizes the intelligent monitoring of the system, which can quickly issue an alarm and handle it when an abnormality occurs, ensuring the safe operation of the equipment.

[0106] An integrated method for purifying dust and acid gas in a gas extraction pipeline comprises the following steps:

[0107] S1. A method for adjusting the concentration ratio of the scrubbing liquid and regularly replenishing the scrubbing liquid, comprising the following steps:

[0108] S11: The hydrogen sulfide concentration sensor 2 is installed at the primary dust collector inlet duct 1, and records a data every five minutes as a cycle. The data recorded in the nth cycle for half an hour are HS n (0), HS n (1) HS n (2) HS n (3) HS n (4) and HS n (5) Each set of data is sent to the direct digital controller 19 at a fixed time. Since hydrogen sulfide gas has a linear relationship with gas extraction, the direct digital controller 19 at the top uses the quadratic exponential sliding average method to calculate the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector according to formula (1) and predict the hydrogen sulfide concentration entering the dust removal and explosion-proof integrated self-excited dust collector in the next few cycles:

[0109]

[0110] Where: is the predicted value of the t+Tth period;

[0111] a t 、b t is the smoothing coefficient;

[0112] are the first exponential smoothing value and the second exponential smoothing value of period t respectively;

[0113] α is the weighting coefficient;

[0114] Among them, the exponential smoothing value of the t period in formula (1) is and the quadratic exponential smoothing value of period t Calculated by formula (2):

[0115]

[0116] The weighting coefficient α is determined based on the periodic changes of the data. When the data series shows a stable trend over time, the weighting coefficient α takes a smaller value of 0.2. When the data series fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.4. When the data series shows an upward or downward trend over time, the weighting coefficient α takes a larger value of 0.7.

[0117] Where: HS t is the initial value of hydrogen sulfide gas in period t; is the exponential smoothing value of the t-1th period, and are the first exponential smoothing value and the second exponential smoothing value of the first period respectively;

[0118] S12: The direct digital controller 19 calculates the content of hydrogen sulfide entering the dust removal and explosion-proof integrated self-excited dust collector in half an hour according to formula (3):

[0119]

[0120] Where: G1 is the first group of hydrogen sulfide content recorded by the direct digital controller;

[0121] P is the power of the induced draft fan;

[0122] η J ,η C are respectively the fan efficiency and mechanical transmission efficiency of the induced draft fan;

[0123] f is the static pressure of the induced draft fan;

[0124] is the predicted value of the t+Tth period, which is the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector during the predicted period;

[0125] S13: According to the reaction equation (4) between the scrubbing liquid and the hydrogen sulfide gas in the gas, the required concentration ratio of the scrubbing liquid is calculated, and then the electromagnetic valves 14 under the liquid storage bottles on both sides of the dust removal and explosion-proof integrated self-excited dust collector are adjusted according to the formula (5) to change the concentration of the scrubbing liquid;

[0126] D+H2S→KS+G (4);

[0127] Where: D is KXL-Ⅱ mining hydrogen sulfide absorbent;

[0128] KS and G are reactive survival substances;

[0129]

[0130] Where: G n The hydrogen sulfide content of the nth group of cycles recorded by the direct digital controller;

[0131] G n+1 The hydrogen sulfide content of the n+1th group of cycles recorded by the direct digital controller;

[0132] S2. A method for adjusting the frequency of the induced draft fan 23 by monitoring the dust concentration through the dust concentration sensor 3, comprising the following steps:

[0133] S21: The dust concentration sensor 3 is set at the primary dust collector inlet duct 1 and the secondary dust collector inlet duct 20, and records one data every five minutes, and two sets of data are recorded every half hour. The data recorded by the dust concentration sensor 3 on the right side of the primary dust collector inlet duct 1 are F 01 、F 02 、F 03 、F 04 、F 05 and F 06 The dust concentration sensor 3 located in the secondary dust collector inlet duct 10 records the data F 11 、F 12 、F 13 、F 14 、F 15 and F 16 , each set of recorded data is sent to the direct digital controller 19 on the top of the equipment. The direct digital controller 19 calculates the maximum concentration of each group of dust gas entering the dust removal and explosion-proof integrated self-excited dust collector according to formula (6):

[0134]

[0135] S22: The direct digital controller 19 adjusts the frequency of the induced draft fan 23 according to the threshold value set by formula (7);

[0136]

[0137] Where: F 0max The maximum concentration of dust entering the air intake duct of the primary dust collector within half an hour;

[0138] F 1max The maximum concentration of dust entering the air intake duct of the secondary dust collector within half an hour;

[0139] θ min ,θ med and θ maxThey are the three thresholds of the dust concentration sensor set in the air inlet duct of the primary dust collector;

[0140] μ max The threshold value of the dust concentration sensor set in the air inlet duct of the secondary dust collector;

[0141] S3. The explosion alarm method of the dust removal and explosion-proof integrated self-excited dust collector is convenient for the staff to check the status of the equipment and pipelines in time after the explosion, including the following steps:

[0142] S31: Setting the magnetic attraction force of the explosion-proof pressure relief valve 17; the torsional stress of the torsion spring 24 in the explosion-proof throttle plate 12 should be less than the impact force released by the explosion of the minimum concentration of methane, and the minimum magnetic attraction force of the explosion-proof pressure relief valve 17 should be less than the impact force released by the explosion of the minimum concentration of methane. The explosion impact force is calculated according to the ideal minimum explosion concentration of gas of 5%, and is calculated by formula (8):

[0143]

[0144] Where: p is the absolute pressure of the gas in the container;

[0145] V is the volume of the container;

[0146] K is the adiabatic index of the gas, and the adiabatic index of gas is approximately K=1.316;

[0147] S is the area of ​​the explosion-proof throttle plate;

[0148] F is the magnetic attraction force of the explosion-proof pressure relief valve;

[0149] S32: The magnetic explosion-proof pressure relief valve 17 is provided with a door magnetic sensor 25. When an explosion occurs, the explosion-proof pressure relief valve 17 opens under the impact of the explosion, and the transmitter of the door magnetic sensor 25 separates from the magnetic strip. The transmitter immediately sends an alarm signal, which is transmitted to the direct digital controller 19.

[0150] S33: The direct digital controller 19 receives the alarm signal from the transmitter part of the door magnetic sensor 25, and controls the buzzer inside the direct digital controller 19 to generate an alarm prompt sound, prompting the staff that an explosion has occurred in the dust removal and explosion-proof integrated self-excited dust collector, so that the equipment operator can check the operating status of the dust removal and explosion-proof integrated self-excited dust collector and the extraction pipeline in time.

Claims

1. An integrated purification device for dust and acid gas in a gas extraction pipeline, characterized in that: include: A cyclone-type primary dust collector comprises a lower box, a conical cylinder (5), a primary dust collector air inlet duct (1), a cylinder (6) and a primary dust collector exhaust duct (7); the cylinder (6) and the primary dust collector exhaust duct (7) are fixed inside the lower box; the cylinder (6) is located outside the primary dust collector exhaust duct (7), and the axes of the cylinder (6) and the primary dust collector exhaust duct (7) coincide with each other; the upper end of the primary dust collector exhaust duct (7) extends to the upper part of the lower box; the primary dust collector air inlet duct ( 1) is fixed on the lower box body, one end extends to the outside of the lower box body, and the other end extends to the inside of the cylinder (6), and a gap is provided between the outer side surfaces of the primary dust collector air inlet duct (1) and the primary dust collector exhaust duct (7); the axis of the primary dust collector air inlet duct (1) and the axis of the primary dust collector exhaust duct (7) are perpendicular to each other in space; the conical cylinder (5) is fixed to the bottom of the cylinder (6); the axes of the conical cylinder (5) and the cylinder (6) coincide with each other; and the bottom of the conical cylinder (5) is provided with an opening; A dust removal and explosion-proof integrated self-excited dust collector comprises a liquid storage tank (13), a secondary dust collector air intake pipe (10), a secondary dust collector exhaust pipe (20), a guide plate (11), and an explosion-proof throttle plate (12); the liquid storage tank (13) is fixed to the upper part of the lower box body; the secondary dust collector air intake pipe (10) is fixed to the liquid storage tank (13) and is connected to the primary dust collector exhaust pipe (7); an opening is provided at the upper end of the secondary dust collector air intake pipe (10); the upper end of the guide plate (11) is fixed to the lower side of the opening of the secondary dust collector air intake pipe (10); the upper end of the explosion-proof throttle plate (12) is hinged to the upper side of the opening of the secondary dust collector air intake pipe (10); the lower ends of the guide plate (11) and the explosion-proof throttle plate (12) both extend obliquely toward the lower part of the liquid storage tank (13); The dust exhaust box (4) is installed in the lower box body; the opening at the bottom of the cone cylinder (5) is inserted into the dust exhaust box (4); An induced draft fan (23) is installed at the upper end of the liquid storage tank (13), with an air inlet communicating with the liquid storage tank (13) and an air outlet communicating with the secondary dust collector exhaust duct (20); A direct digital controller (19) is installed on the liquid storage tank (13) and is electrically connected to the induced draft fan (23).

2. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: The cyclone-type primary dust collector further comprises a hydrogen sulfide concentration sensor (2) and a plurality of dust concentration sensors (3); the hydrogen sulfide concentration sensor (2) is mounted on the primary dust collector air inlet duct (1); the plurality of dust concentration sensors (3) are dispersedly mounted on the primary dust collector air inlet duct (1) and the secondary dust collector air inlet duct (10); the hydrogen sulfide concentration sensor (2) and the dust concentration sensor (3) are respectively electrically connected to the direct digital controller (19).

3. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: The diameter of the cone cylinder gradually decreases from top to bottom.

4. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: The liquid storage tank (13) is provided with an overflow port (9) and a sewage outlet (8).

5. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: The dust removal and explosion-proof integrated self-excited dust collector further comprises an electromagnetic valve (14) and a liquid storage bottle (15); the liquid storage bottle (15) is fixed to one side of the liquid storage tank (13) and is connected to the liquid storage tank (13) through a pipeline; the electromagnetic valve (14) is installed on the pipeline between the liquid storage bottle (15) and the liquid storage tank (13).

6. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: A torsion spring (24) is installed on the explosion-proof throttle plate (12); one end of the torsion spring (24) is connected to the explosion-proof throttle plate (12), and the other end is connected to the secondary dust collector air inlet pipe (10).

7. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: An explosion-proof pressure relief valve (17) is provided on the side of the liquid storage tank (13); a dehydration plate (16) is installed on the inner wall of the liquid storage tank (13); one end of the dehydration plate (16) is fixed on the liquid storage tank (13), and the other end extends toward the direction of the secondary dust collector air inlet pipe (10).

8. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to claim 1 is characterized in that: The dust removal and explosion-proof integrated self-excited dust collector also includes a corrugated demister plate (18); one end of the corrugated demister plate (18) is connected to the liquid storage tank (13), and the other end is connected to the air inlet of the induced draft fan (23).

9. The integrated dust and acid gas purification equipment in the gas extraction pipeline according to any one of claims 1 to 8, characterized in that: The direct digital controller (19) is equipped with a signal transceiver (21); the explosion-proof pressure relief valve (17) is equipped with a door magnetic sensor (25); a buzzer is provided inside the direct digital controller (19); the signal transceiver (21) and the door magnetic sensor (25) are electrically connected to the direct digital controller (19) respectively.

10. An integrated method for purifying dust and acid gas in a gas extraction pipeline, characterized in that: The following steps are involved: S1. A method for adjusting the concentration ratio of the scrubbing liquid and regularly replenishing the scrubbing liquid, comprising the following steps: S11: The hydrogen sulfide concentration sensor (2) is installed at the air inlet duct of the primary dust collector. It records a data every five minutes as a cycle. The data recorded in the nth cycle for half an hour are respectively HS n (0), HS n (1) HS n (2) HS n (3) HS n (4) and HS n (5), each set of data is sent to the direct digital controller (19) at regular intervals. Since hydrogen sulfide gas has a linear relationship with gas extraction, the direct digital controller (19) at the top uses the quadratic exponential sliding average method to calculate the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector at regular intervals according to formula (1) and predict the hydrogen sulfide concentration entering the dust removal and explosion-proof integrated self-excited dust collector in the next few cycles: Where: HS t+T is the predicted value of the t+Tth period; a t 、b t is the smoothing coefficient; are the first exponential smoothing value and the second exponential smoothing value of period t respectively; α is the weighting coefficient; Among them, the exponential smoothing value HS of the t period in formula (1) is t 1 and the quadratic exponential smoothing value HS of period t t 2 Calculated by formula (2): The weighting coefficient α is determined based on the periodic changes of the data. When the data series shows a stable trend over time, the weighting coefficient α takes a smaller value of 0.

2. When the data series fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.

4. When the data series shows an upward or downward trend over time, the weighting coefficient α takes a larger value of 0.

7. Where: HS t is the initial value of hydrogen sulfide gas in period t; is the exponential smoothing value of the t-1 period, and are the first exponential smoothing value and the second exponential smoothing value of the first period respectively; S12: The direct digital controller (19) calculates the content of hydrogen sulfide entering the dust removal and explosion-proof integrated self-excited dust collector in half an hour according to formula (3): Where: G1 is the first group of hydrogen sulfide content recorded by the direct digital controller; P is the power of the induced draft fan; η J ,η C are respectively the fan efficiency and mechanical transmission efficiency of the induced draft fan; f is the static pressure of the induced draft fan; is the predicted value of the t+Tth period, that is, the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excited dust collector during the predicted period; S13: According to the reaction equation (4) between the scrubbing liquid and the hydrogen sulfide gas in the gas, the required concentration ratio of the scrubbing liquid is calculated, and then the electromagnetic valves (14) under the liquid storage bottles on both sides of the dust removal and explosion-proof integrated self-excited dust collector are adjusted according to the formula (5) to change the concentration of the scrubbing liquid; D+H2S→KS+G (4); Where: D is KXL-Ⅱ mining hydrogen sulfide absorbent; KS and G are reactive survival substances; Where: G n The hydrogen sulfide content of the nth group of cycles recorded by the direct digital controller; G n+1 The hydrogen sulfide content of the n+1th group of cycles recorded by the direct digital controller; S2. A method for adjusting the frequency of the induced draft fan (23) by monitoring the dust concentration through a dust concentration sensor (3), comprising the following steps: S21: The dust concentration sensor (3) is set at the primary dust collector air inlet duct (1) and the secondary dust collector air inlet duct (20), and records one data every five minutes, and two sets of data are recorded every half hour. The data recorded by the dust concentration sensor (3) on the right side of the primary dust collector air inlet duct (1) are F 01 、F 02 、F 03 、F 04 、F 05 and F 06 ,The dust concentration sensor (3) located in the air inlet channel of the secondary dust collector records the data of F 11 、F 12 、F 13 、F 14 、F 15 and F 16 , each set of recorded data is sent to the direct digital controller (19) on the top of the device. The direct digital controller (19) calculates the maximum concentration of each group of dust gas entering the dust removal and explosion-proof integrated self-excited dust collector according to formula (6): S22: the direct digital controller (19) adjusts the frequency of the induced draft fan (23) according to the threshold value set by formula (7); Where: F 0max The maximum concentration of dust entering the air intake duct of the primary dust collector within half an hour; F 1max The maximum concentration of dust entering the air intake duct of the secondary dust collector within half an hour; θ min ,θ med and θ max They are the three thresholds of the dust concentration sensor set in the air inlet duct of the primary dust collector; μ max The threshold value of the dust concentration sensor set in the air inlet duct of the secondary dust collector; S3. The explosion alarm method of the dust removal and explosion-proof integrated self-excited dust collector is convenient for the staff to check the status of the equipment and pipelines in time after the explosion, including the following steps: S31: Setting the magnetic attraction of the explosion-proof pressure relief valve (17); the torsional stress of the torsion spring (24) in the explosion-proof throttle plate (12) should be less than the impact force released by the explosion of the minimum concentration of methane, and the minimum magnetic attraction of the explosion-proof pressure relief valve (17) should be less than the impact force released by the explosion of the minimum concentration of methane. The explosion impact force is calculated according to the ideal minimum explosion concentration of gas of 5%, and is calculated by formula (8): Where: p is the absolute pressure of the gas in the container; V is the volume of the container; K is the adiabatic index of the gas; S is the area of ​​the explosion-proof throttle plate; F is the magnetic attraction force of the explosion-proof pressure relief valve; S32: A magnetic door sensor (25) is provided on the magnetic explosion-proof pressure relief valve (17). When an explosion occurs, the explosion-proof pressure relief valve (17) opens under the impact of the explosion, and the transmitter of the door magnetic sensor (25) is separated from the magnetic strip. The transmitter immediately sends an alarm signal and transmits it to the direct digital controller (19). S33: The direct digital controller (19) receives the alarm signal from the transmitter part of the door magnetic sensor (25), and controls the buzzer inside the direct digital controller (19) to generate an alarm prompt sound, prompting the staff that an explosion has occurred in the dust removal and explosion-proof integrated self-excited dust collector, so that the equipment operator can check the operating status of the dust removal and explosion-proof integrated self-excited dust collector and the extraction pipeline in time.

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