A safe and environmentally friendly venting device for carbon black main bag filter

Abstract

The present invention discloses a safe and environmentally friendly venting device for a carbon black main bag filter, which belongs to the technical field of carbon black production. It comprises a venting pipe, the upper end of which is detachably connected to an external mounting pipe, the external mounting pipe being in communication with the venting pipe, the interior of the external mounting pipe being provided with a sliding piston block, the middle portion of the upper surface of the sliding piston block being provided with a column, one end of the column being fixed to the sliding piston block, a fixing ring being provided above the sliding piston block, the edge of the fixing ring being sealed and fixedly connected to the inner wall of the external mounting pipe, the column being slidably connected to the middle portion of the fixing ring, a reset spring being sleeved on the column, the two ends of the reset spring being respectively fixed to the fixing ring and the sliding piston block, a water tank being provided on the outside of the mounting pipe, the water tank being fixed to the surface of the external mounting pipe. This technical solution is used to solve the problem that the sealing mechanism for sealing the venting pipe in the prior art is insufficient in actual use.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon black production, and in particular relates to a safe and environmentally friendly venting device for a carbon black main bag filter. Background Art

[0002] The current carbon black production process is that the carbon black flue gas produced by the cracking reaction of crude oil is cooled and heat-exchanged to a temperature of less than 280°C. It then passes through the air intake manifold and various air intake branches, and is evenly distributed to each box before flowing into the filter bag. More than 99.9% of the carbon black dust in the flue gas is retained on the filter bag, and the gas passes through the filter bag and is sent to the tail gas combustion furnace of the production line and the power plant for fuel use by the tail gas pressure fan.

[0003] A main bag filter venting device is located in the exhaust gas booster fan inlet pipeline at the top of the main bag filter. This device protects the filter bags in the main bag filter by opening and venting them when the bag's load exceeds its upper limit. It also performs gas replacement in the main bag filter during startup and shutdown. To prevent explosions caused by air entering the exhaust gas pipeline during production, the exhaust gas booster fan inlet pressure must be maintained at a positive level. However, because the current main bag filter venting device is a cap-type venting device that opens and closes, exhaust gas leaks may occur if the venting cap is not closed tightly.

[0004] In the prior art, such as patent number CN202111539285.2, a safe and environmentally friendly venting device for a carbon black main bag filter includes a bag filter vent pipe, which is characterized in that: the bag filter vent pipe is provided with an automatic closing vent cap mechanism; the automatic closing vent cap mechanism includes a docking tube arranged at the top of the bag filter vent pipe and having a diameter larger than the bag filter vent pipe, and an air outlet pipe is provided at the top of the docking tube; a lifting cover is provided in the docking tube to close the top of the bag filter vent pipe.

[0005] In the above-mentioned existing technical solution, when there is no need to perform the deflation operation, although the vent pipe can be sealed tightly to a certain extent and gas leakage will not occur, the sealing is achieved by electrically controlling the extension and retraction of the sealing cover, and its structure is relatively complex. In addition, since the gas temperature is high during exhaust, it is very easy to cause damage to the electronic components therein, so there are deficiencies in actual use. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a safe and environmentally friendly venting device for a carbon black main bag filter, which is used to solve the problem that the sealing mechanism for sealing the vent pipe in the prior art is insufficient in actual use.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a safe and environmentally friendly venting device for a carbon black main bag filter, comprising a venting pipe, the upper end of the venting pipe being detachably connected to an external mounting pipe, the external mounting pipe being communicated with the venting pipe, a sliding piston block being provided inside the external mounting pipe, a column being provided in the middle of the upper surface of the sliding piston block, one end of the column being fixed to the sliding piston block, a fixing ring being provided above the sliding piston block, the edge of the fixing ring being sealed and fixedly connected to the inner wall of the external mounting pipe, the column being slidably connected to the middle of the fixing ring, a return spring being sleeved on the column, the two ends of the return spring being respectively fixed to the fixing ring and the sliding piston block, a water tank being provided outside the external mounting pipe, the water tank being fixed to the surface of the external mounting pipe, liquid water being provided in the water tank, an air inlet pipe and an exhaust pipe being provided on the water tank, one end of the air inlet pipe being located at the bottom of the water tank, the other end of the air inlet pipe being communicated with the space between the sliding piston block and the fixing ring under normal conditions, one end of the exhaust pipe being communicated with the upper end of the water tank, and the other end of the exhaust pipe being communicated with the external mounting pipe above the fixing ring.

[0009] Furthermore, an internal mounting tube is provided on the outer side of the end portion of the column above the fixing ring, one end portion of the internal mounting tube is fixed on the fixing ring, a piezoelectric crystal is provided inside the other end of the internal mounting tube, the piezoelectric crystal is fixed on the inner wall of the internal mounting tube, a ceramic cone is provided above the piezoelectric crystal, the ceramic cone is fixed on the end portion of the internal mounting tube, an ignition needle is provided inside the ceramic cone, the ignition needle is electrically connected to the piezoelectric crystal, the end of the exhaust pipe connected to the external mounting tube is located below the ignition needle, an air supply pipe is provided on the outer side of the external mounting tube, and the air outlet end of the air supply pipe is located above the ignition needle.

[0010] Furthermore, a control valve is provided on the part of the air supply pipe located outside the external mounting tube, and a rotating rod is provided on the control valve, one end of the rotating rod is fixed on the rotating shaft of the control valve, and a first permanent magnet is provided on the other end of the rotating rod. A second permanent magnet is provided inside the external mounting tube, and the second permanent magnet is provided on the sliding piston block. Under normal circumstances, the first permanent magnet and the second permanent magnet are staggered in the vertical direction.

[0011] Furthermore, a connecting spring is provided on the rotating rod, one end of the connecting spring is fixed to the end of the rotating rod connected to the first permanent magnet, and the other end of the connecting spring is fixed to the outer wall of the air supply pipe.

[0012] Furthermore, the air supply pipe is fixed to the external mounting pipe through a connecting column.

[0013] Furthermore, a sleeve is provided on one end of the external mounting tube facing the vent tube, one end of the external mounting tube is fixed to the middle of one end of the sleeve and is connected to the sleeve, and the other end of the sleeve is detachably connected to the end of the vent tube.

[0014] Furthermore, a first annular plate is provided on the outer side of the other end of the sleeve, and a second annular plate is provided on the outer side of the vent pipe, and the first annular plate and the second annular plate are connected by bolts.

[0015] Furthermore, an annular sealing ring is provided between the contact surfaces of the first annular plate and the second annular plate.

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

[0017] When the gas pressure borne by the main filter bag exceeds the range, the sliding piston block will move upward under the action of the gas pressure, and the gas will enter the water tank from the air inlet pipe, that is, a small amount of carbon black in the gas will be adsorbed by liquid water, and some harmful gases will dissolve in liquid water, thereby reducing the harm of the exhaust gas to the environment. At the same time, when the gas pressure is within the normal range, the sliding piston will seal the external mounting tube, and the gas will not overflow. At the same time, under the action of liquid water, external gas cannot enter the interior of the equipment. Therefore, this technical solution can also achieve a good sealing effect.

[0018] In this technical solution, the venting device has a simple structure and uses fewer components that require electricity, so there is no need to worry about electronic components being damaged by high-temperature gas.

[0019] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0021] Figure 1 It is a three-dimensional schematic diagram of the venting device of the present invention;

[0022] Figure 2 A three-dimensional schematic diagram of the venting device of the present invention from another perspective;

[0023] Figure 3 It is a schematic cross-sectional view of the venting device of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal stereogram of the venting device of the present invention;

[0025] Figure 5 For the present invention Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0026] Figure 6 For the present invention Figure 3 A partial enlarged schematic diagram of point B in the middle.

[0027] The following are marked in the accompanying drawings:

[0028] 1. Vent pipe; 2. Second annular plate; 3. First annular plate; 4. Bolt; 5. Sleeve; 6. End cover; 7. External mounting tube; 8. Sliding piston block; 9. Water tank; 10. Liquid water; 11. Inlet pipe; 12. Exhaust pipe; 13. Column; 14. Return spring; 15. Retaining ring; 16. Internal mounting tube; 17. Piezoelectric crystal; 18. Ceramic cone; 19. Ignition needle; 20. Air supply pipe; 21. Connecting column; 22. Second permanent magnet; 23. Control valve; 24. Rotating rod; 25. First permanent magnet; 26. Connecting spring. DETAILED DESCRIPTION

[0029] like Figures 1 to 6 As shown, the present invention provides a safe and environmentally friendly venting device for a carbon black main bag filter, including a venting pipe 1. The upper end of the venting pipe 1 is detachably connected to an external mounting pipe 7, and the external mounting pipe 7 is communicated with the venting pipe 1. A sliding piston block 8 is provided inside the external mounting pipe 7. The edge of the sliding piston block 8 slides and is in sealed contact with the inner wall of the external mounting pipe 7. Reference can be made to the piston setting method inside the syringe. A column 13 is provided in the middle of the upper surface of the sliding piston block 8, one end of the column 13 is fixed on the sliding piston block 8, and a fixing ring 15 is provided above the sliding piston block 8. The edge of the fixing ring 15 is sealed and fixedly connected to the inner wall of the external mounting pipe 7, the column 13 is slidably connected to the middle of the fixing ring 15, and a sleeve is provided on the column 13. There is a return spring 14, and the two ends of the return spring 14 are respectively fixed on the fixed ring 15 and the sliding piston block 8. A water tank 9 is provided on the outside of the external mounting tube 7. The water tank 9 is fixed on the surface of the external mounting tube 7. Liquid water 10 is provided in the water tank 9 (preferably, the liquid water 10 can be circulated and supplied and flowed in the water tank 9 to avoid excessively high water temperature, which leads to reduced heat dissipation efficiency). An air intake pipe 11 and an exhaust pipe 12 are provided on the water tank 9. One end of the air intake pipe 11 is located at the bottom of the water tank 9, and the other end of the air intake pipe 11 is connected to the space between the sliding piston block 8 and the fixed ring 15 under normal conditions. One end of the exhaust pipe 12 is connected to the upper end of the water tank 9, and the other end of the exhaust pipe 12 is connected to the external mounting tube 7 above the fixed ring 15.

[0030] The working principle of the above technical solution is:

[0031] When the gas pressure on the main filter bag exceeds the range, the gas pressure will act on the sliding piston block 8, thereby compressing the return spring 14 (the damping of the return spring 14 can be prepared according to the preset gas pressure), causing the sliding piston block 8 to move up. When the sliding piston block 8 moves up to a certain position, causing the end of the intake pipe 11 to leak out, the gas will enter the water tank 9 from the intake pipe 11, that is, a small amount of carbon black in the gas will be adsorbed by the liquid water 10, and some harmful gases will dissolve in the liquid water 10, thereby reducing the harm of the exhaust gas to the environment. At the same time, when the gas pressure is within the normal range, the piston sliding block 8 will seal the external mounting tube 7, and the gas will not overflow. At the same time, under the action of liquid water 10, the liquid water 10 is equivalent to sealing the end of the intake pipe 11 to a certain extent, and the outside gas cannot enter the interior of the equipment. When the pressure inside cannot overcome the resistance of the liquid water 10, the internal gas cannot overflow to the outside. Therefore, this technical solution can also achieve a good sealing effect.

[0032] In one feasible embodiment, an internal mounting tube 16 is provided on the outer side of the end portion of the column 13 above the fixing ring 15, one end portion of the internal mounting tube 16 is fixed on the fixing ring 15, a piezoelectric crystal 17 is provided on the other end of the internal mounting tube 16, the piezoelectric crystal 17 is fixed on the inner wall of the internal mounting tube 16, a ceramic cone 18 is provided above the piezoelectric crystal 17, the ceramic cone 18 is fixed on the end portion of the internal mounting tube 16, an ignition needle 19 is provided inside the ceramic cone 18, the ignition needle 19 is electrically connected to the piezoelectric crystal 17 (the two are electrically connected through a wire), the end of the exhaust pipe 12 connected to the external mounting tube 7 is located below the ignition needle 19, an air supply pipe 20 is provided on the outer side of the external mounting tube 7, and the air outlet end of the air supply pipe 20 is located above the ignition needle 19.

[0033] It is easy to understand that when gas pressure pushes the sliding piston block 8 upward, the column 13 squeezes and acts on the piezoelectric crystal 17. Due to the characteristics of the piezoelectric crystal 17, it produces a discharge effect. Therefore, under the connection of the wire, the voltage released by the piezoelectric crystal 17 is transmitted to the tip of the ignition needle 19, thereby igniting the gas released from the gas supply pipe 20. The reason for setting the exhaust pipe 12 below the ignition needle 19 is that the gas moves upward or passes through the burning flame, thereby achieving full combustion and consuming the combustible and harmful substances inside. Of course, it should be noted that the electrical connection method between the piezoelectric crystal 17 and the ignition needle 19 is existing technology and can be set with reference to the ignition method of a lighter.

[0034] In one feasible embodiment, a control valve 23 is provided on the part of the air supply pipe 20 located outside the external mounting tube 7, and a rotating rod 24 is provided on the control valve 23. One end of the rotating rod 24 is fixed on the rotating shaft of the control valve 23, and the other end of the rotating rod 24 is provided with a first permanent magnet 25. A second permanent magnet 22 is provided inside the external mounting tube 7, and the second permanent magnet 22 is arranged on the sliding piston block 8. Under normal circumstances, the first permanent magnet 25 and the second permanent magnet 22 are staggered in the vertical direction.

[0035] It is not difficult to understand that the first permanent magnet 25 and the second permanent magnet 22 are located in the same plane, but are staggered under normal conditions, that is, the magnetism does not interact with each other. When the sliding piston block 8 is pushed upward by the gas pressure, the first permanent magnet 25 and the second permanent magnet will interact with each other, thereby driving the rotating rod 24 to rotate, thereby opening the passage of the gas supply pipe 20. That is, when exhaust is required, the gas supply pipe 20 is opened to supply gas, and then the ignition needle 19 ignites. The three realize a linkage operation, thereby ensuring the consumption of toxic substances in the gas. Of course, it is not difficult to understand that the material of the external mounting tube 7 can be high-temperature resistant plastic, which will not affect the magnetic effect, and the first permanent magnet 25 and the second permanent magnet 22 are mutually repelled or attracted, which can be determined according to the rotation direction of the shaft when the control valve 23 is opened.

[0036] In one feasible embodiment, a connecting spring 26 is provided on the rotating rod 24, one end of the connecting spring 26 is fixed to the end of the rotating rod 24 connected to the first permanent magnet, and the other end of the connecting spring 26 is fixed to the outer wall of the gas supply pipe 20. The function of the connecting spring 26 is that when the gas pressure decreases and the sliding piston block 8 is reset under the action of the reset spring 14, the connecting spring 26 can drive the rotating rod 24 to reset, thereby closing the control valve 23.

[0037] In one practicable manner, the air supply pipe 20 is fixed to the external mounting pipe 7 via a connecting column 21 .

[0038] In one possible implementation, a sleeve 5 is provided on the end of the external mounting tube 7 facing the vent tube 1. An end cap 6 is provided on one end of the sleeve 5. One end of the external mounting tube 7 is fixed to the middle portion of the end cap 6 and communicates with the sleeve 5. The other end of the sleeve 5 is detachably connected to the end of the vent tube 1. A first annular plate 3 is provided on the outer surface of the other end of the sleeve 5. A second annular plate 2 is provided on the outer surface of the vent tube 1. The first annular plate 3 and the second annular plate 2 are connected by bolts 4. An annular seal is provided between the contact surfaces of the first annular plate 3 and the second annular plate 2. This arrangement not only simplifies the connection structure, but also prevents gas leakage from the connection due to the annular seal. The detachable connection facilitates personnel operation. Gas replacement and maintenance work are performed in the main bag filter.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A safe and environmentally friendly venting device for a carbon black main bag filter, comprising a venting pipe (1), characterized in that: The upper end of the vent pipe (1) is detachably connected to an external mounting pipe (7), the external mounting pipe (7) is in communication with the vent pipe (1), a sliding piston block (8) is provided inside the external mounting pipe (7), a column (13) is provided in the middle of the upper surface of the sliding piston block (8), one end of the column (13) is fixed on the sliding piston block (8), a fixing ring (15) is provided above the sliding piston block (8), the edge of the fixing ring (15) is sealed and fixedly connected to the inner wall of the external mounting pipe (7), the column (13) is slidably connected to the middle of the fixing ring (15), a return spring (14) is sleeved on the column (13), and both ends of the return spring (14) are fixed to the inner wall of the external mounting pipe (7). They are respectively fixed on the fixed ring (15) and the sliding piston block (8), a water tank (9) is provided on the outside of the external mounting tube (7), the water tank (9) is fixed on the surface of the external mounting tube (7), liquid water (10) is provided in the water tank (9), an air inlet pipe (11) and an exhaust pipe (12) are provided on the water tank (9), one end of the air inlet pipe (11) is located at the bottom of the water tank (9), the other end of the air inlet pipe (11) is communicated with the space between the sliding piston block (8) and the fixed ring (15) in a normal state, one end of the exhaust pipe (12) is communicated with the upper end of the water tank (9), and the other end of the exhaust pipe (12) is communicated with the external mounting tube (7) above the fixed ring (15); An internal mounting tube (16) is provided on the outer side of the end portion of the column (13) located above the fixing ring (15), one end portion of the internal mounting tube (16) is fixed on the fixing ring (15), a piezoelectric crystal (17) is provided inside the other end of the internal mounting tube (16), the piezoelectric crystal (17) is fixed on the inner wall of the internal mounting tube (16), a ceramic cone (18) is provided above the piezoelectric crystal (17), the ceramic cone (18) is fixed on the end portion of the internal mounting tube (16), an ignition needle (19) is provided inside the ceramic cone (18), the ignition needle (19) is electrically connected to the piezoelectric crystal (17), one end of the exhaust pipe (12) connected to the external mounting tube (7) is located below the ignition needle (19), an air supply pipe (20) is provided on the outer side of the external mounting tube (7), and the air outlet end of the air supply pipe (20) is located above the ignition needle (19); A control valve (23) is provided on the portion of the air supply pipe (20) located outside the external mounting pipe (7), a rotating rod (24) is provided on the control valve (23), one end of the rotating rod (24) is fixed to the rotating shaft of the control valve (23), and a first permanent magnet (25) is provided on the other end of the rotating rod (24). A second permanent magnet (22) is provided inside the external mounting pipe (7), and the second permanent magnet (22) is arranged on the sliding piston block (8). Under normal conditions, the first permanent magnet (25) and the second permanent magnet (22) are staggered in the vertical direction.

2. A safe and environmentally friendly venting device for a carbon black main bag filter according to claim 1, characterized in that: A connecting spring (26) is provided on the rotating rod (24), one end of the connecting spring (26) is fixed to one end of the rotating rod (24) connected to the first permanent magnet (25), and the other end of the connecting spring (26) is fixed to the outer wall of the air supply pipe (20).

3. A safe and environmentally friendly venting device for a carbon black main bag filter according to claim 2, characterized in that: The air supply pipe (20) is fixed to the external mounting pipe (7) via a connecting column (21).

4. A safe and environmentally friendly venting device for a carbon black main bag filter according to claim 3, characterized in that: A sleeve (5) is provided on one end of the external mounting tube (7) facing the vent tube (1), one end of the external mounting tube (7) is fixed to the middle of one end of the sleeve (5) and is in communication with the sleeve (5), and the other end of the sleeve (5) is detachably connected to the end of the vent tube (1).

5. A safe and environmentally friendly venting device for a carbon black main bag filter according to claim 4, characterized in that: A first annular plate (3) is provided on the outer side of the other end of the sleeve (5), and a second annular plate (2) is provided on the outer side of the vent pipe (1). The first annular plate (3) and the second annular plate (2) are connected by bolts (4).

6. A safe and environmentally friendly venting device for a carbon black main bag filter according to claim 5, characterized in that: An annular sealing ring is provided between the contact surfaces of the first annular plate (3) and the second annular plate (2).

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