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

Abstract

The invention discloses integrated purification equipment and method for dust and acid gas in a gas extraction pipeline, and the equipment comprises a cyclone type primary dust remover which comprises a lower box body, a conical cylinder, a primary dust remover gas inlet pipeline, a cylinder and a primary dust remover gas exhaust pipeline; the dust removal and explosion prevention integrated self-excitation dust remover comprises a liquid storage tank, a secondary dust remover air inlet pipeline, a secondary dust remover air outlet pipeline, a flow guide plate and an explosion prevention throttling plate, a dust discharge box; an induced draft fan; a direct digital controller; dust and acid poisonous and harmful gas in extracted gas can be effectively removed, corrosion of dust deposition pipelines and extraction pipelines is prevented, explosion transmission is effectively avoided, pressure relief of the pipelines during explosion is carried out in time, and harm to surrounding operators is avoided.

Description

Technical Field

[0001] The 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 is to drill holes into coal seams and gas accumulation areas during coal mining, connect the holes to special gas transportation pipelines, and use extraction equipment to extract gas from coal seams and goafs to the ground for use or discharge. However, during the gas extraction process, since the coal seams contain a large amount of dust and acidic toxic and harmful gases, they will enter the extraction pipeline along with the extraction process. On the one hand, the acidic toxic and harmful gases extracted will corrode the extraction pipeline and reduce the service life of the extraction pipeline. On the other hand, dust will block the extraction pipeline, posing a safety hazard of dust explosion or gas accumulation explosion, threatening the safety of surrounding mine workers. At the same time, the emission of harmful gases such as dust will also cause atmospheric pollution. During the gas extraction process, the friction between the gas and the pipeline is prone to generate static electricity. There is a risk of gas explosion when encountering high concentrations of gas. Therefore, explosion-proof devices should be equipped 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 to form 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 gas in a gas extraction pipeline, which can effectively remove dust and acidic toxic and harmful gases in the extracted gas, prevent dust deposition pipelines and extraction pipelines from corrosion, effectively avoid the transmission of explosions, and promptly relieve the pressure of the pipeline during explosions to avoid harm to surrounding workers.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an integrated purification device for dust and acid gas in a gas extraction pipeline, including a cyclone-type primary dust collector, including a lower box, 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; 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; the primary dust collector air inlet pipe is fixed on the lower box, one end extends to the outside of the lower box, 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 at 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-removing 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 on 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, the air inlet is connected to the liquid storage tank, and the air outlet is connected to the exhaust duct of the secondary dust collector;

[0009] A direct digital controller is mounted 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 intake duct of the primary dust collector; multiple dust concentration sensors are dispersedly installed on the air intake duct of the primary dust collector and the air intake 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 pipeline; the electromagnetic valve is installed on the pipeline 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 duct 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 air inlet duct of the secondary dust collector.

[0016] Preferably, the dust removal and explosion-proof integrated self-excited dust collector also includes a corrugated defogger plate; one end of the corrugated defogger 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 acidic gas in a gas extraction pipeline comprises the following steps:

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

[0020] S11: The hydrogen sulfide concentration sensor installed at the primary dust collector inlet duct records a data every five minutes as a cycle. The data recorded in the nth cycle within 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 a fixed time. Since hydrogen sulfide gas has a linear relationship with gas extraction, the direct digital controller at the top uses the quadratic exponential moving 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 concentration of hydrogen sulfide gas 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] They 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] Among them, the weighting coefficient α is determined according to the periodic change of the data; when the data sequence shows a stable horizontal trend over time, the weighting coefficient α takes a smaller value of 0.2; when the data sequence fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.4; when the data sequence 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 They 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: G 1 The first set of hydrogen sulfide levels recorded for the direct digital controller;

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

[0034] η J , η C They 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 sensors installed at the primary dust collector air inlet duct and the secondary dust collector air inlet duct record 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 air 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 three thresholds of the dust concentration sensor set in the air intake duct of the primary dust collector;

[0052] μ max is the threshold value of the dust concentration sensor set in the air intake 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 after the explosion in time, including the following steps:

[0054] S31: Setting 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 explosion of the minimum concentration of methane, and the minimum magnetic attraction force of the explosion-proof pressure relief valve 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 gas explosion concentration of 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 is separated 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, thereby reminding 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: The equipment can effectively remove dust and acidic toxic and harmful gases carried during gas extraction through the combination of a cyclone primary dust collector and a dust removal and explosion-proof integrated self-excitation dust collector. The cyclone primary dust collector uses centrifugal force to separate larger dust particles, while the secondary dust collector further filters out fine dust and removes acidic components in the gas through liquid washing, avoiding dust clogging the pipeline and acidic gas corrosion to the pipeline, thereby extending the service life of the pipeline.

[0065] Improved explosion-proof safety: The explosion-proof throttle plate and explosion-proof pressure relief valve design of the equipment can effectively avoid the risk of gas accumulation and dust explosion. When the gas or dust concentration reaches a dangerous level, the explosion-proof throttle plate automatically closes and restricts the gas flow to prevent the spread of the explosion. In addition, the liquid in the storage tank can further reduce the accumulation of static electricity, reducing the risk of explosion caused by static electricity generated by friction between gas and pipelines during gas extraction.

[0066] Compact and convenient equipment: Compared with the existing water seal explosion proof device, this equipment has a compact structure and light weight, which is convenient for moving and installing with the gas extraction work, greatly improving the adaptability of the equipment. In particular, the automatic adjustment system of the liquid storage bottle and electromagnetic valve can flexibly adjust the purification process according to actual needs, improving the practicality and convenience of operation of the equipment.

[0067] Environmental benefits: Through efficient treatment of dust and acidic gases, this equipment can significantly reduce the emission of harmful substances and reduce the risk of air pollution, which meets the increasing environmental protection requirements of coal mining enterprises. In addition, the equipment design focuses on reducing the consumption of gas washing liquid, further reducing operating costs.

[0068] Strong comprehensive processing capability: This equipment can not only process dust and acidic gas in the gas extraction process at the same time, but also has explosion-proof function, which solves the problem of single function of existing equipment and reduces multiple safety hazards caused by imperfect equipment functions. Its integrated design greatly 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 It is a structural schematic diagram of the explosion-proof throttle plate in the present invention;

[0071] Figure 3 It is a structural schematic diagram of the explosion-proof pressure relief valve in 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. cone, 6. cylinder, 7. primary dust collector exhaust duct, 8. sewage outlet, 9. overflow, 10. secondary dust collector air inlet duct, 11. guide plate, 12. explosion-proof throttle plate, 13. liquid storage tank, 14. electromagnetic 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. induced draft fan, 24. torsion spring, 25. door magnetic sensor. DETAILED DESCRIPTION

[0074] The present invention will be further described below in conjunction with 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 includes:

[0076] A 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] The cyclone primary dust collector of this equipment is designed to effectively capture coarse dust particles flowing in the pipeline through the action of centrifugal force, reduce the load of subsequent equipment, and reduce large particles in the airflow. When the airflow enters the cyclone primary dust collector, it rotates due to the tangential entry of the airflow, so that the dust is thrown to the inner wall of the cylinder 6 under the action of centrifugal force, and finally enters the dust box 4 through the opening at the bottom of the cone 5.

[0078] The dust-removing and explosion-proof integrated self-excited dust collector comprises 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; an opening is provided at the upper end of the secondary dust collector air intake duct 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 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 aroused by the airflow (liquid level difference, impact water curtain, shear droplets, entrained bubbles, etc.).

[0079] The dust removal and explosion-proof integrated self-excited dust collector of the equipment not only efficiently separates the residual dust in the gas, but also has an explosion-proof function. The guide plate 11 changes the direction of the airflow by deflecting, so that larger dust particles can be separated and settled to the bottom of the liquid storage tank 13. The explosion-proof throttle plate 12 increases the speed of the airflow and the contact area between the gas and the liquid by reducing the flow area of ​​the airflow, thereby improving the removal efficiency of dust and acidic gases. When an explosion occurs inside the system, the explosion-proof throttle plate 12 can be closed in time to prevent the spread of the explosion gas and ensure the safety of the equipment and operators.

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

[0081] The design of the dust exhaust 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] The induced draft fan 23 is installed at the upper end of the liquid storage tank 13, the air inlet is connected to the liquid storage tank 13, and the air outlet is connected to the secondary dust collector exhaust duct 20. The induced draft fan 23 is provided with a frequency converter 22, which performs real-time wind force adjustment through the signal transmitted by the direct digital controller 19 to improve the dust removal efficiency of the equipment.

[0083] The induced draft fan 23 provides continuous power to ensure smooth gas flow, thereby improving the processing efficiency of the entire system. The induced draft fan 23 is arranged in a reasonable position to avoid damage to the blades of the induced draft fan 23 after the dust and gas are mixed, thereby extending the service life of the equipment.

[0084] The direct digital controller 19 is installed on the liquid storage tank 13 and is electrically connected to the induced draft fan 23. The direct digital controller 19 uses a computer to detect the controlled parameters, and then performs calculations according to the set value and the control algorithm, and then outputs to the actuator to control the equipment so that the controlled parameters are stabilized at the given value. The direct digital controller 19 receives the signals transmitted by the hydrogen sulfide concentration sensor 2 and the dust concentration sensor 3, performs calculations using the control algorithm, and transmits the output signals to the frequency converter 22 of the induced draft fan 23 and the electromagnetic valve 14 connected to the bottom of the liquid storage bottle 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, recording a data point every five minutes, and continuously recording the data changes 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 duct 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 intake 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 uses chemical copper plating technology to firmly adsorb the protective layer on the surface, effectively preventing the explosion-proof device from being corroded by acidic and toxic gases in the gas. Each pipeline is treated with anti-static treatment, including setting up automatic discharge grounding devices, installing anti-static sleeves, and using appropriate grounding methods for grounding.

[0087] The cylinder 6 and the conical cylinder 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 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 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 hydrogen sulfide concentration sensor 2 and the dust concentration sensor 3 in the system can effectively identify the hydrogen sulfide content and dust concentration in the gas by real-time monitoring of the gas composition, ensuring the safe operation of the equipment under harsh conditions. The direct digital controller 19 automatically adjusts the concentration of the gas washing liquid in the liquid storage tank 13 according to the feedback of the sensor, further improving the gas purification effect.

[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 primary dust collector, so that the dust in the airflow gradually sinks during the rotation process and is finally 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 the drain port 8 of the liquid storage tank 13 are designed to ensure stable control of the liquid during long-term operation of the equipment, avoiding overfilling or clogging of the liquid storage tank 13, thereby ensuring 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 pipeline; the electromagnetic valve 14 is installed on the pipeline 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 of the system and can automatically adjust the flow and concentration of the scrubbing liquid according to the change of dust concentration, thereby ensuring the gas purification effect and reducing the consumption of the scrubbing liquid.

[0096] In this embodiment, two liquid storage bottles 15 and corresponding electromagnetic valves 14 are respectively configured and 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 to maintain efficient and stable operation under higher loads.

[0098] In this embodiment, 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. When the equipment is operating normally, the explosion-proof throttle plate 12 accelerates the airflow and adjusts the filling degree of the liquid curtain in the dust removal chamber. When an explosion occurs, the explosion-proof throttle plate 12 rotates downward instantaneously under the action of the explosion shock wave, contacts the surface of the gas washing liquid, plays a liquid sealing role, avoids the transmission of the explosion flame, and thus prevents the transmission of the explosion.

[0099] When an explosion occurs, the torsion spring 24 is designed to quickly close the explosion-proof throttle plate 12 to prevent the diffusion of the explosion gas and ensure the safety of the 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 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 intake pipe 10. The dehydration plate 16 is connected to the explosion-proof pressure relief door through a common rotating shaft and a connecting bracket. The explosion-proof pressure relief door adopts a magnetic suction type. When an explosion occurs, the dehydration plate 16 drives the connected magnetic suction explosion-proof pressure relief door to rotate outward due to the impact force generated by the explosion. The explosion force is much greater than the magnetic suction force, and the magnetic suction valve opens, thereby releasing the pressure in the explosion-proof chamber, avoiding the transmission of the explosion impact force, and playing an explosion-proof pressure relief role for the gas extraction pipeline.

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

[0102] In this embodiment, the dust removal and explosion-proof integrated self-excited dust collector also includes a corrugated defogger 18 ; one end of the corrugated defogger 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 acidic gas in a gas extraction pipeline comprises the following steps:

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

[0108] S11: The hydrogen sulfide concentration sensor 2 installed at the primary dust collector inlet duct 1 records a data every five minutes as a cycle. The set of data recorded in the nth cycle within half an hour is 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 moving average method to calculate the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excitation dust collector according to formula (1) and predict the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excitation 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] They 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] Among them, the weighting coefficient α is determined according to the periodic change of the data; when the data sequence shows a stable horizontal trend over time, the weighting coefficient α takes a smaller value of 0.2; when the data sequence fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.4; when the data sequence 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 They 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: G 1 The first set of hydrogen sulfide levels recorded for the direct digital controller;

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

[0122] η J , η C They 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, that 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 valve 14 under the liquid storage bottle on both sides of the dust removal and explosion-proof integrated self-excited dust collector is 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 installed at the primary dust collector air inlet duct 1 and the secondary dust collector air inlet duct 20 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 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 secondary dust collector air intake 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 at 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 three thresholds of the dust concentration sensor set in the air intake duct of the primary dust collector;

[0140] μ max is the threshold value of the dust concentration sensor set in the air intake 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 after the explosion in time, including the following steps:

[0142] 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 gas explosion concentration of 5%, 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 is opened 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;

[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 intake 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 intake duct (1) is fixed to the lower box; the cylinder (6) and the primary dust collector exhaust duct (7) are ... 1) is fixed on the lower box body, one end of which extends to the outside of the lower box body and the other end of which extends to the inside of the cylinder (6), and a gap is provided between the outer sides 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 an opening is provided at the bottom of the conical cylinder (5); A dust-removing 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 arranged 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), the air inlet of the induced draft fan (23) is connected to the liquid storage tank (13), and the air outlet of the induced draft fan (23) is connected to the exhaust duct (20) of the secondary dust collector; The 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 intake duct (1); the plurality of dust concentration sensors (3) are dispersedly mounted on the primary dust collector air intake duct (1) and the secondary dust collector air intake duct (10); the hydrogen sulfide concentration sensor (2) and the dust concentration sensor (3) are electrically connected to the direct digital controller (19) respectively.

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 decreases gradually 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 also includes 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 defogger (18); one end of the corrugated defogger (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 arranged 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 acidic gas in a gas extraction pipeline, characterized in that: The following steps are involved: S1. A method for adjusting the concentration ratio of a scrubbing liquid and replenishing the scrubbing liquid at a regular interval, comprising the following steps: S11: A hydrogen sulfide concentration sensor (2) is installed at the air inlet duct of the primary dust collector. It records a data set every five minutes as a cycle. The set of data recorded in the nth cycle within half an hour is 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 moving average method to calculate the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excitation dust collector according to formula (1) and predict the concentration of hydrogen sulfide gas entering the dust removal and explosion-proof integrated self-excitation 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; They 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): Among them, the weighting coefficient α is determined according to the periodic change of the data; when the data sequence shows a stable horizontal trend over time, the weighting coefficient α takes a smaller value of 0.2; when the data sequence fluctuates greatly over time, the weighting coefficient α takes an intermediate value of 0.4; when the data sequence 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-1th period, and They 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 They 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 conversion of an 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) installed at the primary dust collector air inlet duct (1) and the secondary dust collector air inlet duct (20) 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 (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) at 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 three thresholds of the dust concentration sensor set in the air intake duct of the primary dust collector; μ max is the threshold value of the dust concentration sensor set in the air intake 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 after the explosion in time, 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 methane with the minimum concentration, 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 methane with the minimum concentration. The explosion impact force is calculated according to the minimum explosion concentration of gas under ideal conditions 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 door magnetic 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, thereby notifying 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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