Treatment equipment for chemical tail gas and use method

Abstract

The invention relates to the technical field of chemical tail gas treatment equipment, discloses chemical tail gas treatment equipment and a use method, and aims to solve the problem that the same position of an opposite tower wall is scoured by washing liquid and dust-containing gas flow for a long time, so that local wear of the area is caused. The air outlet pipe is intermittently rotated through the power mechanism, so that the time of blowing dust-containing airflow exhausted by the air outlet pipe to the lining on the inner wall of the separation tower is the same, the lining circumferentially arranged on the inner wall of the separation tower can be uniformly worn, and the service life of the whole lining on the inner wall of the separation tower is prolonged; when the air outlet pipe rotates, the rotating disc is driven to rotate, the wave grooves in the rotating disc are rotated to drive the punching rod to reciprocate in the axial direction, the punching rod can be driven to reciprocate once when the air outlet pipe rotates once, and when the blow-down valve is opened for blow-down, the bottom end of the punching rod which reciprocates impacts the communicating position of the blow-down valve and the separation tower; and blockage of the blow-down valve caused by bridging of impurities accumulated at the communicating part of the blow-down valve and the separation tower is prevented.

Description

Technical Field

[0001] This application relates to the technical field of chemical exhaust gas treatment equipment, and in particular to a treatment device and method for chemical exhaust gas. Background Technology

[0002] Chemical waste gas refers to mixed gases emitted during chemical production (such as reaction, distillation, cracking, synthesis, and refining unit operations) that cannot be directly used in the main process flow. Chemical waste gas has a complex composition, and a single technology is insufficient to treat it. Therefore, it is generally purified through a combined process of "pretreatment + core treatment + fine treatment." During pretreatment, a Venturi scrubber is typically used to remove particulate matter and dissolved waste gas from the waste gas.

[0003] A Venturi scrubber typically includes a Venturi tube, a separation tower, a circulating pump, and a demister. Chemical exhaust gas and scrubbing liquid are mixed through the Venturi tube and then blown into the separation tower through a connecting pipe for separation. However, because the outlet of the connecting pipe always faces the same position on the inner wall of the separation tower, and the misty scrubbing liquid and airflow passing through the outlet of the connecting pipe contain impurity particles, the scrubbing liquid and dust-laden airflow continuously scour the same position on the opposite tower wall, causing localized wear in that area, which seriously affects the lifespan and safe operation of the equipment. Summary of the Invention

[0004] This application proposes a treatment device and method for chemical tail gas, which has the advantage of uniform wear on the inner wall of the separation tower, thereby solving the problem of localized wear in the area caused by prolonged washing liquid and dust-laden gas flow scouring the same position on the opposite tower wall.

[0005] To achieve the above objectives, this application adopts the following technical solution: a treatment device and method for chemical tail gas, comprising a venturi tube, a separation tower, a circulating pump, a demister, a connecting pipe, and an electrical control cabinet. The inner wall of the separation tower is fitted with several linings. A drain valve is connected to the bottom of the separation tower. The connecting pipe penetrates the side wall of the separation tower. One end of the connecting pipe is connected to the venturi tube, and the other end of the connecting pipe is located at the axis of the separation tower and vertically downwards. A steering device is connected to the end of the connecting pipe inside the separation tower. The steering device includes: a rotary joint, comprising an outer ring and an inner ring, the outer ring being fixedly connected to the connecting pipe; an outlet pipe, fixedly connected to the inner ring of the rotary joint, being L-shaped, with the outlet end facing the inner wall of the separation tower; and a power mechanism for driving the outlet pipe to rotate intermittently.

[0006] Furthermore, the power mechanism includes: a transmission disc, which is fixedly sleeved on one vertical end of the exhaust pipe and has a ring-shaped array of toothed grooves on its upper end; a stepper motor, which is fixedly connected to the outer wall of the separation tower and electrically connected to the electrical control cabinet; and a bevel gear, which is connected to the output end of the stepper motor through a transmission shaft and meshes with the toothed grooves on the transmission disc.

[0007] Furthermore, an annular sealing shell is fixedly fitted on the outer side of the air outlet pipe, the bevel gear and the transmission disc are located inside the sealing shell, and the side wall of the sealing shell is fixedly connected to the inner wall of the separation tower by a fixing rod.

[0008] Furthermore, the bottom end of the vent pipe is connected to an anti-clogging device, which includes: a rotating disk, fixedly installed at the lower end of the vent pipe, with a wave groove connected end to end on its side wall; a punch rod, which has a tree-like structure, including a main rod and several secondary rods, one end of the several secondary rods being fixedly connected to the top of the main rod, and the other end of the several secondary rods being inserted into the wave groove of the rotating disk, the main rod of the punch rod being vertically downward and close to the connection between the drain valve and the separation tower; and a fixing ring, which is fixedly connected to the inner wall of the separation tower through a fixing rod, with several secondary rods of the punch rod passing through the same fixing ring.

[0009] Furthermore, the number of ripples in the wave groove is an integer multiple of the number of secondary rods.

[0010] Furthermore, a punch hammer is fixedly connected to the bottom end of the main rod of the punch rod, and the punch hammer is spindle-shaped.

[0011] Furthermore, a detection device is installed on the side wall of the outlet pipe. The detection device includes: a support arm, which is L-shaped, with one end fixedly connected to the side wall of the outlet pipe and the other end vertically downward with an installation groove; and a detection column, which is inserted into the installation groove and has its end abutting against the inner lining of the separation tower, for detecting the thickness of the inner lining of the separation tower that bears the dust-containing gas discharged from the outlet pipe.

[0012] Furthermore, the detection column is equipped with: a resistance strip, embedded in the inner wall of the detection column; a support spring, one end of which is fixedly connected to the bottom end of the inner wall of the detection column; a conductor block, fixedly connected to the other end of the support spring; a stop rod, fixedly connected to the end of the conductor block facing the opening of the detection column, and slidably sealed to the inner wall of the detection column; and a ball bearing, embedded in the end of the stop rod facing the inner wall of the separation tower, and in rolling contact with the inner lining of the separation tower.

[0013] The conductor block and the resistance bar are electrically connected to the electrical control cabinet via an electric slip ring. The electric slip ring includes an inner slip ring and an outer slip ring. The outer slip ring is fixedly connected to the outer ring of the rotary joint, and the inner slip ring is fixedly connected to the inner ring of the rotary joint.

[0014] Furthermore, the mounting groove on the support arm is a longitudinally arranged elongated oval groove, and the detection device further includes: a push block, which is fixedly connected to the side walls of the detection column at both ends of the mounting groove, and a counterweight is fixedly connected to its bottom end; and a push ring, which is fixedly connected to several secondary rods of the punch rod, and its outer edge is located directly below the push block.

[0015] Furthermore, the following steps are included:

[0016] S1. After a period of time, the electrical control cabinet opens the drain valve to discharge sewage. At the same time, the electrical control cabinet starts the stepper motor, which drives the transmission plate and the air outlet pipe to rotate synchronously. The air outlet pipe rotates to a certain angle and then stops. The direction of the air outlet end of the air outlet pipe changes. Through long-term operation, the air outlet pipe rotates intermittently, so that the dust-laden airflow discharged through the Venturi tube, connecting pipe and air outlet pipe blows to each lining on the inner wall of the separation tower for the same amount of time.

[0017] S2. During the rotation of the vent pipe, the vent pipe drives the rotating disk to rotate synchronously. The wave groove on the rotating disk drives the punch rod to move up and down reciprocally. Each reciprocating movement of the punch rod impacts the connection between the drain valve and the separation tower.

[0018] S3. The rotating vent pipe drives the support arm and the detection column to rotate synchronously, and the detection column monitors the wear of the inner wall lining of the separation tower in real time.

[0019] S4. Since the ball bearings on the detection column are always pressed against the inner lining of the separation tower, the wear degree of the inner lining is different, and the support point of the inner lining on the ball bearings is different. Through the transmission of the ball bearings and the abutment rod, the contact point between the conductor block and the resistance strip is different. When the wear of the inner lining is greater than the set degree, the contact position between the conductor block and the resistance strip is outside the set position. The electrical control cabinet monitors that the current change in the conductor block, resistance strip and slip ring is outside the specified range, and the electrical control cabinet opens the alarm to sound an alarm.

[0020] S5. The exhaust pipe drives the support arm and the detection column to rotate, and the rotating disk rotates synchronously. The wave groove on the rotating disk drives the punch rod to move up and down reciprocally, so that the punch rod drives the push ring to push the counterweight, push block and detection column to move up. In one cycle, the detection column rotates around the axis of the separation tower and moves axially back and forth once. The detection trajectory of the detection column on the lining is wave-shaped, which increases the detection range of the detection column.

[0021] This application has the following beneficial effects:

[0022] 1. The present application provides a treatment device for chemical tail gas, which uses a power mechanism to intermittently rotate the outlet pipe so that the dust-laden gas flow that passes through the venturi tube, connecting pipe and outlet pipe blows onto the lining of the inner wall of the separation tower for the same amount of time, instead of always blowing onto the lining of a certain place. This allows the circumferentially arranged lining of the inner wall of the separation tower to wear evenly, thus extending the overall service life of the lining of the inner wall of the separation tower.

[0023] 2. The present application provides a treatment device for chemical tail gas. When the outlet pipe is driven to rotate by the power mechanism, it drives the rotating disk to rotate. The wave groove on the rotating disk drives the punch rod to reciprocate axially. Each rotation of the outlet pipe will drive the punch rod to reciprocate once. When the drain valve is opened to discharge sewage, the bottom end of the reciprocating punch rod impacts the connection between the drain valve and the separation tower to prevent the impurities accumulated at the connection between the drain valve and the separation tower from bridging and causing the drain valve to be blocked.

[0024] 3. The present application provides a treatment device for chemical tail gas. When the outlet pipe is driven to rotate by the power mechanism, the outlet pipe drives the support arm and the detection column to rotate synchronously. The rotating detection column detects the thickness of the inner wall of the separation tower that bears the dust-containing gas discharged from the outlet pipe, so as to prevent the inner wall of the separation tower from being damaged due to the inner wall bearing the dust-containing gas being too thin.

[0025] 4. The present application provides a treatment device for chemical tail gas. The outlet pipe drives the support arm and the detection column to rotate. During the process of detecting the thickness of the inner lining of the separation tower that bears the dust-containing gas discharged from the outlet pipe, the wave groove of the rotating disk drives the punch and push ring to move axially once, so that the push ring drives the push block and the detection column to move axially once. The detection column moves synchronously in the circumference and axial direction of the outlet pipe, so that the detection trajectory of the detection column is wave-shaped, thereby increasing the detection range of the detection column and enabling the detection column to detect a large area of ​​the inner lining of the separation tower that bears the dust-containing gas discharged from the outlet pipe. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0027] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a cross-sectional view of the separation cylinder of the present invention;

[0030] Figure 3 This is a schematic diagram showing the connection of the connecting pipe, rotary joint, air outlet pipe and power mechanism of the present invention.

[0031] Figure 4 This is a schematic diagram showing the connection of the air outlet pipe, rotating disk, punch rod, and fixing ring of the present invention;

[0032] Figure 5 This is a schematic diagram showing the connection between the rotating disk, the punch, and the fixing ring of the present invention;

[0033] Figure 6 This is a cross-sectional view of the air outlet pipe, support arm, detection column, and push block of the present invention;

[0034] Figure 7 For the present invention Figure 6 Enlarged view of the local structure at point A in the middle.

[0035] In the diagram: 1. Venturi tube; 2. Separation tower; 21. Lining; 22. Drain valve; 23. Water supply pipe; 24. Exhaust pipe; 25. Observation window; 3. Circulation pump; 4. Demister; 5. Connecting pipe; 61. Rotary joint; 62. Air outlet pipe; 63. Power mechanism; 631. Stepper motor; 632. Bevel gear; 633. Transmission disc; 64. Sealing shell; 71. Rotary disc; 72. Corrugated groove; 73. Punch rod; 74. Fixing ring; 75. Punch hammer; 81. Support arm; 811. Mounting groove; 82. Detection column; 821. Resistance strip; 822. Support spring; 823. Conductor block; 824. Push rod; 825. Ball bearing; 83. Push block; 831. Counterweight block; 84. Push ring; 9. Electrical control cabinet. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] Example 1

[0038] Please see Figures 1-4A device for treating chemical waste gas includes a venturi tube 1, a separation tower 2, a circulating pump 3, a demister 4, a connecting pipe 5, and an electrical control cabinet 9. The connecting pipe 5 runs through the middle of the side wall of the separation tower 2, and the connection between the connecting pipe 5 and the separation tower 2 is sealed. The end of the connecting pipe 5 located outside the separation tower 2 is connected to the venturi tube 1. Several liners 21 are arrayed on the inner wall of the separation tower 2. A drain valve 22, which is a solenoid valve, is connected to the outlet at the bottom of the separation tower 2 and is electrically connected to the electrical control cabinet 9. A water supply pipe 23 is connected to one side wall of the separation tower 2. 3 is used to replenish the solution in the separation tower 2. The center of the top of the separation tower 2 is connected to the exhaust pipe 24, which is used to discharge gas. Several observation windows 25 are fixedly installed on the side wall of the separation tower 2. The observation windows 25 are used to observe the situation inside the separation tower 2. A circulation pump 3 is fixedly installed on the outer wall of one side of the separation tower 2. The inlet of the circulation pump 3 is connected to the lower part of the interior of the separation tower 2. The outlet of the circulation pump 3 extends into the venturi tube 1 through the outlet pipe and the nozzle. A demister 4 is fixedly installed on the upper part of the inner wall of the separation tower 2. The electrical control cabinet 9 is used to control the overall operation of the chemical tail gas treatment equipment.

[0039] One end of the connecting pipe 5 inside the separation tower 2 is located at the axis of the separation tower 2 and is vertically downward. A steering device is connected to this end of the connecting pipe 5 inside the separation tower 2. The steering device includes a rotary joint 61, an outlet pipe 62, and a power mechanism 63. The rotary joint 61 includes an outer ring and an inner ring. The outer ring of the rotary joint 61 is fixedly connected to the connecting pipe 5, and the inner ring of the rotary joint 61 is fixedly connected to the outlet pipe 62. The outlet pipe 62 is L-shaped, and its outlet end faces the inner wall of the separation tower 2. The power mechanism 63 is used to drive the outlet pipe 62 to rotate intermittently. Mechanism 63 includes a stepper motor 631, a bevel gear 632, and a transmission disk 633. The transmission disk 633 is fixedly sleeved on one vertical end of the air outlet pipe 62. The upper end of the transmission disk 633 has a ring-shaped array of toothed grooves. The stepper motor 631 is fixedly connected to the outer wall of the separation tower 2 and is electrically connected to the electrical control cabinet 9. The output end of the stepper motor 631 is connected to a transmission shaft. The transmission shaft is inserted into the separation tower 2. One end of the transmission shaft inserted into the separation tower 2 is fixedly sleeved with a bevel gear 632. The bevel gear 632 meshes with the toothed grooves on the transmission disk 633.

[0040] In addition, an annular sealing shell 64 is fixedly sleeved on the outside of the air outlet pipe 62, and the bevel gear 632 and the transmission disc 633 are located inside the sealing shell 64. The side wall of the sealing shell 64 is fixedly connected to the inner wall of the separation tower 2 by a fixing rod. The connection between the sealing shell 64 and the air outlet pipe 62 is sealed and slidably installed. The transmission shaft is sealed and installed at the position where it passes through the side wall of the separation tower 2 and the side wall of the sealing shell 64. The sealing shell 64 is used to isolate and protect the bevel gear 632 and the transmission disc 633 to prevent impurities in the separation tower 2 from falling into the transmission part of the bevel gear 632 and the transmission disc 633, which would affect the transmission effect.

[0041] When operating the chemical exhaust gas treatment equipment, the chemical exhaust gas is introduced into the Venturi tube 1. After being treated by the Venturi tube 1, the chemical exhaust gas enters the separation tower 2 through the connecting pipe 5, rotary joint 61, and outlet pipe 62. At this time, the treated dust-laden gas is blown towards the inner lining 21 of the inner wall of the separation tower 2 through the outlet end of the outlet pipe 62. After a period of time, the impurities separated in the separation tower 2 enter the bottom of the separation tower 2. The electrical control cabinet 9 needs to open the drain valve 22 to discharge the impurities at the bottom of the separation tower 2. At the same time, the electrical control cabinet 9 starts the stepper motor 631, so that the output end of the stepper motor 631 drives the bevel gear 632 to rotate. The bevel gear 632 meshes with the toothed groove on the transmission disc 633, driving the transmission disc 633 and the outlet pipe 62 to rotate synchronously. After the outlet pipe 62 rotates to a certain angle, it stops. At this time, the direction of the outlet end of the outlet pipe 62 changes. Through long-term operation, the outlet pipe 62 rotates intermittently, so that the dust-laden airflow discharged through the venturi tube 1, the connecting pipe 5 and the outlet pipe 62 blows to each lining 21 on the inner wall of the separation tower 2 for the same amount of time, instead of always blowing to the lining 21 at a certain point on the inner wall of the separation tower 2. This allows the circumferentially arranged lining 21 on the inner wall of the separation tower 2 to be evenly worn by the dust-laden gas, extending the overall service life of the lining 21 on the inner wall of the separation tower 2.

[0042] Example 2

[0043] Example 2 is a further improvement based on Example 1.

[0044] Unlike Example 1, please refer to Figures 1-7The bottom end of the vent pipe 62 is connected to an anti-clogging device to prevent blockage at the connection between the drain valve 22 and the separation tower 2. The anti-clogging device includes a rotating disk 71, a punch rod 73, and a fixing ring 74. The rotating disk 71 is fixedly installed at the lower end of the vent pipe 62, and the axis of the rotating disk 71 is on the same straight line as the axis of the separation tower 2. The side wall of the rotating disk 71 is provided with a wave groove 72 connected end to end. The punch rod 73 has a tree-like structure, including a main rod and several secondary rods. One end of the secondary rod is fixedly connected to the top of the main rod, and several secondary rods are arranged in a circular array. The other end of several secondary rods is inserted into the wave groove 72 of the rotating disk 71. The main rod of the punch rod 73 is vertically downward, and the bottom end of the main rod is close to the connection between the drain valve 22 and the separation tower 2. Several secondary rods of the punch rod 73 pass through the same fixing ring 74, and the fixing ring 74 is fixedly connected to the inner wall of the separation tower 2 through the fixing rod. Several secondary rods slide in contact with the connection between the fixing ring 74 and the connection between the fixing ring 74.

[0045] It should be noted that the number of corrugations in the wave groove 72 is an integer multiple of the number of secondary rods, ensuring that the ends of the secondary rods of several punches 73 are at the same position on each corrugation of the wave groove 72.

[0046] During the operation of the chemical tail gas treatment equipment, after a period of treatment, the drain valve 22 is opened to discharge impurities from the bottom of the separation tower 2. Simultaneously, the electrical control cabinet 9 starts the stepper motor 631, which drives the bevel gear 632 to rotate. The rotating bevel gear 632 drives the transmission disc 633 and the outlet pipe 62 to rotate synchronously. The outlet pipe 62 rotates a certain angle and then stops. During the rotation of the outlet pipe 62, it drives the rotating disc 71 to rotate synchronously. Because the punch 73 is restricted from rotation by the fixing ring 74, and the punch... The secondary rod of 73 is inserted into the corrugated groove 72 of the rotating disk 71. The corrugated groove 72 on the rotating disk 71 drives the punch rod 73 to move up and down reciprocally. The angle of rotation of the air outlet pipe 62 and the rotating disk 71 each time is the length of one corrugated groove of the corrugated groove 72, that is, to make the punch rod 73 move axially reciprocally once. The punch rod 73 moves reciprocally once, and the bottom end of the main rod of the punch rod 73 impacts the connection between the drain valve 22 and the separation tower 2 once, to prevent the impurities accumulated at the connection between the drain valve 22 and the separation tower 2 from bridging and causing the drain valve 22 to be blocked.

[0047] In addition, a hammer 75 is fixedly connected to the bottom of the main rod of the punch rod 73. The hammer 75 is spindle-shaped. The hammer 75 at the bottom of the main rod of the punch rod 73 strengthens the impact on the connection between the drain valve 22 and the separation tower 2. Furthermore, the spindle-shaped hammer 75 can automatically remove the mud and dirt on the hammer 75.

[0048] Furthermore, a detection device is installed on the side wall of the outlet pipe 62. The detection device is used to detect the thickness of the lining 21 on the inner wall of the separation tower 2 that bears the dust-containing gas discharged from the outlet pipe 62. The detection device includes a support arm 81 and a detection column 82. The support arm 81 is L-shaped. One end of the support arm 81 is fixedly connected to the side wall of the outlet pipe 62, and the other end of the support arm 81 is vertically downward. An installation groove 811 is opened on the side wall of the vertically downward end of the support arm 81. The detection column 82 is inserted into the installation groove 811, and the end of the detection column 82 abuts against the lining 21 on the inner wall of the separation tower 2. The detection column 82 is used to detect the thickness of the lining 21 on the inner wall of the separation tower 2 that bears the dust-containing gas discharged from the outlet pipe 62.

[0049] The detection column 82 contains a resistance strip 821, a support spring 822, a conductor block 823, a stop rod 824, and a ball bearing 825. The inner wall of the detection column 82 has an insulating layer. The resistance strip 821 is embedded in the inner wall of the detection column 82. One end of the support spring 822 is fixedly connected to the bottom end of the inner wall of the detection column 82, and the other end of the support spring 822 is fixedly connected to the conductor block 823. The conductor block 823 slides in contact with the resistance strip 821. The support spring 822 is always in a compressed state, and the conductor block 823 opens towards the detection column 82. One end of the device is fixedly connected to a stop rod 824, and the stop rod 824 is slidably and sealingly connected to the inner wall of the detection column 82. A ball bearing 825 is embedded in the end of the stop rod 824 facing the inner wall of the separation tower 2. The ball bearing 825 is in rolling contact with the inner lining 21 of the inner wall of the separation tower 2. The conductor block 823 and the resistor strip 821 are electrically connected to the electrical control cabinet 9 through an electric slip ring. The electric slip ring is coaxially installed with the rotary joint 61. The electric slip ring includes an inner slip ring and an outer slip ring. The outer slip ring is fixedly connected to the outer ring of the rotary joint 61, and the inner slip ring is fixedly connected to the inner ring of the rotary joint 61.

[0050] Furthermore, the mounting groove 811 on the support arm 81 is a longitudinally arranged elongated oval groove, and the detection column 82 can slide along the length of the mounting groove 811. The length of the mounting groove 811 and the distance between the crest and trough of the wave groove 72 are greater than the diameter of the air outlet pipe 62. The highest point of the mounting groove 811 on the support arm 81 is higher than the air outlet end of the air outlet pipe 62, and the lowest point of the mounting groove 811 on the support arm 81 is lower than the air outlet end of the air outlet pipe 62. The detection device also includes push blocks 83 and push rings 84. Push blocks 83 are fixedly connected to the side walls at both ends of the mounting groove 811 of the detection column 82. The two push blocks 83 are respectively close to the side walls on both sides of the support arm 81. The bottom ends of the two push blocks 83 are fixedly connected to counterweight blocks 831. Several secondary rods of the punch rod 73 are fixedly connected to the same push ring 84. The outer edge of the push ring 84 is directly below the push block 83. When the push ring 84 moves upward with the punch rod 73, the push ring 84 can push the push block 83 upward.

[0051] During the operation of the chemical tail gas treatment equipment, after a period of treatment, the drain valve 22 is opened to discharge the impurities at the bottom of the separation tower 2. At the same time, the electrical control cabinet 9 starts the stepper motor 631, which drives the bevel gear 632 to rotate. The rotating bevel gear 632 drives the transmission disk 633 and the gas outlet pipe 62 to rotate synchronously. The gas outlet pipe 62 rotates to a certain angle and then stops. The rotating gas outlet pipe 62 drives the support arm 81 and the detection column 82 to rotate synchronously. During use, the detection column 82 monitors the wear degree of the inner wall lining 21 of the separation tower 2 in real time.

[0052] Because the support spring 822 provides support for the conductor block 823, the abutment rod 824, and the ball bearing 825, even if the liner 21 is worn, the ball bearing 825 on the detection column 82 always rests against the liner 21 on the inner wall of the separation tower 2. Due to the different degrees of wear on the liner 21, the support points of the liner 21 on the ball bearing 825 are different. Through the transmission of the ball bearing 825 and the abutment rod 824, the contact points between the conductor block 823 and the resistor strip 821 are different. When the wear of the liner 21 on the inner wall of the separation tower 2 exceeds the set level, the contact position between the conductor block 823 and the resistor strip 821 is outside the set position. At this time, the electrical control cabinet 9 monitors that the current change in the conductor block 823, the resistor strip 821, and the slip ring is outside the specified range. The electrical control cabinet 9 activates the alarm to alert the staff to inspect and replace the liner 21 of the separation tower 2.

[0053] During the process of the vent pipe 62 driving the support arm 81 and the detection column 82 to rotate, enabling the detection column 82 to monitor the wear degree of the inner wall lining 21 of the separation tower 2, the vent pipe 62 drives the rotating disk 71 to rotate synchronously. The wave groove 72 on the rotating disk 71 drives the punch rod 73 to move up and down reciprocally as a whole, causing the punch rod 73 to drive the push ring 84 to move up and down reciprocally synchronously. The upward-moving push ring 84 pushes the counterweight block 831, the push block 83 and the detection column 82 to move synchronously, so that the detection column 82 moves within the mounting groove 811. In one cycle, the detection column 82 rotates around the axis of the separation tower 2 and moves axially back and forth once, so that the contact trajectory between the detection column 82 and the lining 21 forms a wave shape. That is, the detection trajectory of the detection column 82 on the lining 21 is wave-shaped, thereby increasing the detection range of the detection column 82, so that the detection column 82 can detect a large area of ​​the lining 21 on the inner wall of the separation tower 2 that bears the dust-containing gas discharged from the vent pipe 62.

[0054] A method of using a chemical exhaust gas treatment device includes the following steps:

[0055] S1. When using the chemical tail gas treatment equipment, the chemical tail gas is introduced into the Venturi tube 1. After being treated by the Venturi tube 1, the chemical tail gas enters the separation tower 2 through the connecting pipe 5, the rotary joint 61 and the outlet pipe 62. At this time, the treated dust-laden gas is blown towards the inner lining 21 of the inner wall of the separation tower 2 through the outlet end of the outlet pipe 62.

[0056] S2. After a period of time, the electrical control cabinet 9 opens the drain valve 22 to discharge sewage. At the same time, the electrical control cabinet 9 starts the stepper motor 631, which drives the transmission plate 633 and the air outlet pipe 62 to rotate synchronously. The air outlet pipe 62 rotates to a certain angle and then stops. The direction of the air outlet end of the air outlet pipe 62 changes. Through long-term operation, the air outlet pipe 62 rotates intermittently, so that the dust-laden airflow discharged through the Venturi tube 1, the connecting pipe 5 and the air outlet pipe 62 blows to each lining 21 on the inner wall of the separation tower 2 for the same amount of time.

[0057] S3. During the rotation of the vent pipe 62, the vent pipe 62 drives the rotating disk 71 to rotate synchronously. The wave groove 72 on the rotating disk 71 drives the punch rod 73 to move up and down reciprocally. The punch rod 73 impacts the connection between the drain valve 22 and the separation tower 2 once after one reciprocating movement.

[0058] S4. The rotating vent pipe 62 drives the support arm 81 and the detection column 82 to rotate synchronously. The detection column 82 monitors the wear degree of the inner wall lining 21 of the separation tower 2 in real time.

[0059] S5. Since the ball bearing 825 on the detection column 82 is always pressed against the inner lining 21 of the inner wall of the separation tower 2, the wear degree of the inner lining 21 is different, and the support point of the inner lining 21 on the ball bearing 825 is different. Through the transmission of the ball bearing 825 and the abutment rod 824, the contact point between the conductor block 823 and the resistor strip 821 is different. When the wear of the inner lining 21 is greater than the set degree, the contact position between the conductor block 823 and the resistor strip 821 is outside the set position. The electrical control cabinet 9 monitors that the current change in the conductor block 823, the resistor strip 821 and the slip ring is outside the specified range, and the electrical control cabinet 9 opens the alarm to sound an alarm.

[0060] S6. The exhaust pipe 62 drives the support arm 81 and the detection column 82 to rotate. The rotating disk 71 rotates synchronously. The wave groove 72 on the rotating disk 71 drives the punch rod 73 to move up and down as a whole. The punch rod 73 drives the push ring 84 to push the counterweight block 831, the push block 83 and the detection column 82 to move upward. In one cycle, the detection column 82 rotates around the axis of the separation tower 2 and moves axially back and forth once. The detection trajectory of the detection column 82 on the inner lining 21 is wave-shaped, which increases the detection range of the detection column 82.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for treating chemical waste gas, comprising a venturi tube (1), a separation tower (2), a circulating pump (3), a demister (4), a connecting pipe (5), and an electrical control cabinet (9), wherein the inner wall of the separation tower (2) is fitted with several linings (21), and the bottom end of the separation tower (2) is connected to a drain valve (22), characterized in that: The connecting pipe (5) penetrates the side wall of the separation tower (2). One end of the connecting pipe (5) is connected to a Venturi tube (1), and the other end of the connecting pipe (5) is located at the axis of the separation tower (2) and is vertically downward. The end of the connecting pipe (5) inside the separation tower (2) is connected to a steering device, which includes: The rotary joint (61) includes an outer ring and an inner ring, the outer ring being fixedly connected to the connecting pipe (5); The outlet pipe (62) is fixedly connected to the inner ring of the rotary joint (61), and is L-shaped, with the outlet end facing the inner wall of the separation tower (2); The power mechanism (63) is used to drive the exhaust pipe (62) to rotate intermittently.

2. The apparatus for treating chemical tail gas according to claim 1, wherein: The power mechanism (63) includes: The transmission disc (633) is fixedly sleeved on one vertical end of the air outlet pipe (62), and the upper end is provided with a ring array of toothed grooves; A stepper motor (631) is fixedly connected to the outer wall of the separation tower (2) and electrically connected to the electrical control cabinet (9); The bevel gear (632) is connected to the output end of the stepper motor (631) via a drive shaft and meshes with the tooth groove on the drive plate (633).

3. The apparatus for treating chemical plant off-gas according to claim 2, wherein: An annular sealing shell (64) is fixedly fitted on the outside of the air outlet pipe (62). The bevel gear (632) and the transmission disc (633) are located inside the sealing shell (64). The side wall of the sealing shell (64) is fixedly connected to the inner wall of the separation tower (2) by a fixing rod.

4. The equipment for treating chemical waste gas according to claim 2, characterized in that: The bottom end of the air outlet pipe (62) is connected to an anti-blocking device, which includes: A rotating disk (71) is fixedly installed at the lower end of the air outlet pipe (62), and a wave groove (72) with the ends connected is provided on the side wall. The punch rod (73) has a tree-like structure, including a main rod and several secondary rods. One end of several secondary rods is fixedly connected to the top of the main rod, and the other end of several secondary rods is inserted into the wave groove (72) of the rotating disk (71). The main rod of the punch rod (73) is vertically downward and close to the connection between the drain valve (22) and the separation tower (2). The fixing ring (74) is fixedly connected to the inner wall of the separation tower (2) by a fixing rod, and several secondary rods of the punch (73) pass through the same fixing ring (74).

5. The equipment for treating chemical waste gas according to claim 4, characterized in that: The number of ripples in the wave groove (72) is an integer multiple of the number of secondary bars.

6. The equipment for treating chemical waste gas according to claim 4, characterized in that: The bottom end of the main rod of the punch (73) is fixedly connected to a punch hammer (75), which is spindle-shaped.

7. The equipment for treating chemical waste gas according to claim 4, characterized in that: A detection device is installed on the side wall of the air outlet pipe (62), the detection device comprising: The support arm (81) is L-shaped, with one end fixedly connected to the side wall of the air outlet pipe (62), and the other end vertically downward with an installation groove (811). The detection column (82) is inserted into the mounting groove (811) and its end abuts against the inner lining (21) of the inner wall of the separation tower (2) for detecting the thickness of the inner lining (21) of the separation tower (2) that bears the dust-containing gas discharged from the outlet pipe (62).

8. The equipment for treating chemical waste gas according to claim 7, characterized in that: The detection column (82) is equipped with: A resistor strip (821) is embedded in the inner wall of the detection column (82); The support spring (822) is fixedly connected at one end to the bottom end of the inner wall of the detection column (82); The conductor block (823) is fixedly connected to the other end of the support spring (822); The push rod (824) is fixedly connected to one end of the conductor block (823) facing the opening of the detection column (82), and is slidably sealed to the inner wall of the detection column (82); The ball bearing (825) is embedded in one end of the abutment (824) facing the inner wall of the separation tower (2) and rolls in contact with the inner lining (21) of the inner wall of the separation tower (2); The conductor block (823) and the resistor strip (821) are electrically connected to the electrical control cabinet (9) through an electric slip ring. The electric slip ring includes an inner slip ring and an outer slip ring. The outer slip ring is fixedly connected to the outer ring of the rotary joint (61), and the inner slip ring is fixedly connected to the inner ring of the rotary joint (61).

9. The equipment for treating chemical waste gas according to claim 8, characterized in that: The mounting groove (811) on the support arm (81) is a longitudinally arranged elongated oval groove, and the detection device further includes: Push block (83) is fixedly connected to the side wall at both ends of the detection column (82) in the mounting groove (811), and a counterweight block (831) is fixedly connected to the bottom end. The push ring (84) is fixedly connected to several secondary rods of the punch (73), and its outer edge is directly below the push block (83).

10. The method of using the equipment for treating chemical waste gas according to claim 9, characterized in that: Includes the following steps: S1. After a period of time, the electrical control cabinet (9) opens the drain valve (22) to discharge sewage. At the same time, the electrical control cabinet (9) starts the stepper motor (631) so that the stepper motor (631) drives the transmission disk (633) and the air outlet pipe (62) to rotate synchronously. The air outlet pipe (62) rotates to a certain angle and then stops. The direction of the air outlet end of the air outlet pipe (62) changes. Through long-term operation, the air outlet pipe (62) rotates intermittently so that the dust-laden airflow discharged through the Venturi tube (1), the connecting pipe (5) and the air outlet pipe (62) blows to each lining (21) on the inner wall of the separation tower (2) for the same amount of time. S2. During the rotation of the vent pipe (62), the vent pipe (62) drives the rotating disk (71) to rotate synchronously. The wave groove (72) on the rotating disk (71) drives the punch (73) to move up and down as a whole. The punch (73) moves up and down once and impacts the connection between the drain valve (22) and the separation tower (2). S3. The rotating vent pipe (62) drives the support arm (81) and the detection column (82) to rotate synchronously. The detection column (82) monitors the wear degree of the inner wall lining (21) of the separation tower (2) in real time. S4. Since the ball (825) on the detection column (82) is always pressed against the inner lining (21) of the inner wall of the separation tower (2), the wear degree of the inner lining (21) is different, and the support point of the inner lining (21) on the ball (825) is different. Through the transmission of the ball (825) and the abutment (824), the contact point between the conductor block (823) and the resistor strip (821) is different. When the wear of the inner lining (21) is greater than the set degree, the contact position between the conductor block (823) and the resistor strip (821) is outside the set position. The electrical control cabinet (9) monitors that the current change in the conductor block (823), the resistor strip (821) and the electric slip ring is outside the specified range, and the electrical control cabinet (9) opens the alarm to sound an alarm. S5. The exhaust pipe (62) drives the support arm (81) and the detection column (82) to rotate. The rotating disk (71) rotates synchronously. The wave groove (72) on the rotating disk (71) drives the punch (73) to move up and down as a whole. This causes the punch (73) to drive the push ring (84) to push the counterweight (831), the push block (83) and the detection column (82) to move upward. In one cycle, the detection column (82) rotates around the axis of the separation tower (2) and moves back and forth axially once. The detection trajectory of the detection column (82) on the inner lining (21) is wave-shaped, increasing the detection range of the detection column (82).

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