Ionic liquid desulfurization device for tail gas treatment

Abstract

The utility model relates to the technical field of ionic liquid desulfurization, and discloses an ionic liquid desulfurization device for tail gas treatment, which comprises a desulfurization tower and a separation tank, one side of the outer part of the desulfurization tower is fixedly connected with a dust removal box, the outer part of the dust removal box is fixedly connected with a gas inlet pipe, and a filter plate is arranged in the dust removal box; limiting grooves are formed in the left side and the right side of the interior of the filter plate, a spring is fixedly connected to one side of the interior of each limiting groove, a limiting block is fixedly connected to the other end of each spring, a clamping block is fixedly connected to one side of each limiting block, and a pull rope is fixedly connected to the other side of each limiting block. According to the utility model, through the mutual cooperation of the dust removal box, the filter plate and other structures, tail gas can be filtered before entering the desulfurizing tower, particulate matters mixed in the tail gas are prevented from damaging equipment, and meanwhile, the filter plate is mounted in a clamping manner, so that the filter plate is convenient to disassemble, maintain or clean, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ionic liquid desulfurization, in particular to an ionic liquid desulfurization device for tail gas treatment. Background Art

[0002] In the current traditional production process of smelting, chemical industry, etc., a large amount of sulfur dioxide gas is often produced. In order to achieve the safe emission of sulfur dioxide gas, it is usually necessary to carry out multi-level desulfurization treatment to achieve the emission of sulfur dioxide gas in compliance with the standard. At present, the main desulfurization methods include sodium alkali method, limestone desulfurization method and ionic liquid desulfurization method. Among them, the ionic liquid desulfurization method uses ionic liquid as a solvent, which can efficiently absorb and remove sulfide, thereby achieving the desulfurization treatment of fuel.

[0003] Although the ionic liquid desulfurization method can effectively remove sulfur dioxide in the tail gas, achieving an efficient desulfurization effect, the tail gas contains particulate matter and some dust. If it is not filtered, the particulate matter will hinder the desulfurization process of the sulfide in the flue gas, reduce the desulfurization efficiency, and damage the equipment, reducing the service life of the device. In view of the above problems, the technicians in this field have proposed an ionic liquid desulfurization device for tail gas treatment to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an ionic liquid desulfurization device for exhaust gas treatment, aiming to improve the problem that the desulfurization device in the prior art lacks an effective filtering structure, so that particulate matter in the exhaust gas enters the desulfurization tower, affecting the desulfurization efficiency and causing device wear.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ionic liquid desulfurization device for exhaust gas treatment, comprising a desulfurization tower and a separation tank, a dust removal box is fixedly connected to one side of the outside of the desulfurization tower, an air intake pipe is fixedly connected to the outside of the dust removal box, a filter plate is installed inside the dust removal box, limiting grooves are provided on both sides of the inside of the filter plate, a spring is fixedly connected to one side of the inside of the limiting groove, a limiting block is fixedly connected to one end of the spring, a clamping block is fixedly connected to one side of the limiting block, a pull rope is fixedly connected to the other side of the limiting block, clamping grooves are provided on both sides of the inside of the dust removal box, a desulfurization circulation pump is fixedly connected to the other side of the outside of the desulfurization tower, and a solid-liquid separation component is arranged inside the separation tank.

[0006] Furthermore, the solid-liquid separation component includes a motor, which is fixedly connected to the top of the separation tank, and the output end of the motor is fixedly connected to a stirring rod, and the outside of the stirring rod is fixedly connected to a plurality of stirring blades, and the outside of the separation tank is fixedly connected to a water pump, and the output end of the water pump is fixedly connected to an infusion tube, and the other end of the infusion tube is connected to the top through hole of the separation tank, and the input end of the water pump is fixedly connected to a transfer tube.

[0007] Furthermore, the output end of the desulfurization circulation pump is fixedly connected to a spray pipe through a water pipe, the spray pipe is fixedly connected to the inner top of the desulfurization tower, and the input end of the desulfurization circulation pump is connected to a connecting point on one side of the bottom of the desulfurization tower through a pipeline.

[0008] Furthermore, a transfer pipe is fixedly connected to the bottom rear end connection of the desulfurization tower, and the other end of the transfer pipe is connected to the input end of the water pump.

[0009] Furthermore, the top of the filter plate is rotatably connected to a rotating rod, the bottom end of the rotating rod is fixedly connected to one end of two pull ropes, and the outside of the pull ropes is slidably connected to the inside of the filter plate.

[0010] Furthermore, the outer portion of the limiting block is slidably connected to the inner wall of the limiting groove, and the outer portion of the spring is slidably connected to the inner wall of the limiting groove.

[0011] Furthermore, a feed port is provided at the top of the separation tank, a liquid discharge pipe is provided at one side of the outside of the separation tank, and a material discharge pipe is provided at the bottom of the separation tank.

[0012] Furthermore, the longitudinal section of the card block is set to be square, and the outside of the card block is slidably connected to the inside of the card slot.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the dust removal box, filter plate, spring, pull rope, card block and other structures cooperate with each other, so that the exhaust gas will be filtered before entering the desulfurization tower, preventing the particulate matter mixed in the exhaust gas from damaging the equipment and reducing the efficiency of desulfurization. At the same time, the filter plate is installed by snap-fitting, which is convenient for disassembly, maintenance or cleaning, thereby extending the service life of the equipment.

[0015] 2. In the utility model, through the mutual cooperation of the stirring rod, separation tank, stirring blades, water pump and other structures, the solid-liquid separation operation of the ionic liquid that has absorbed sulfur dioxide is realized under low temperature conditions, so that the purified ionic liquid can re-enter the system for recycling, thereby improving the utilization rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a three-dimensional diagram of an ionic liquid desulfurization device for tail gas treatment proposed by the utility model;

[0017] Figure 2 This is a cross-sectional view of a dust removal box of an ionic liquid desulfurization device for tail gas treatment proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the separation tank structure of an ionic liquid desulfurization device for tail gas treatment proposed by the utility model;

[0019] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. Desulfurization tower; 2. Air inlet pipe; 3. Dust removal box; 4. Filter plate; 5. Rotating rod; 6. Limiting groove; 7. Spring; 8. Limiting block; 9. Pull rope; 10. Block; 11. Slot; 12. Desulfurization circulation pump; 13. Spray pipe; 14. Transfer pipe; 15. Water pump; 16. Infusion pipe; 17. Motor; 18. Separation tank; 19. Stirring blade; 20. Stirring rod; 21. Drain pipe; 22. Discharge pipe; 23. Feed inlet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 4The utility model provides an embodiment: an ionic liquid desulfurization device for tail gas treatment, comprising a desulfurization tower 1 and a separation tank 18, a dust removal box 3 is fixedly connected to one side of the outside of the desulfurization tower 1, an air intake pipe 2 is fixedly connected to the outside of the dust removal box 3, a filter plate 4 is installed inside the dust removal box 3, and a limiting groove 6 is provided on both sides of the inside of the filter plate 4, a spring 7 is fixedly connected to one side of the limiting groove 6, and the other end of the spring 7 is fixedly connected to a limiting block 8, one side of the limiting block 8 is fixedly connected to a card block 10, and the other side of the limiting block 8 is fixedly connected There is a pull rope 9, and slots 11 are provided on the left and right sides of the interior of the dust removal box 3. A desulfurization circulation pump 12 is fixedly connected to the other side of the outside of the desulfurization tower 1. The top of the filter plate 4 is rotatably connected to a rotating rod 5, and the bottom end of the rotating rod 5 is fixedly connected to one end of the two pull ropes 9. The outside of the pull rope 9 is slidably connected to the inside of the filter plate 4, the outside of the limit block 8 is slidably connected to the inner wall of the limit groove 6, the outside of the spring 7 is slidably connected to the inner wall of the limit groove 6, the longitudinal section of the block 10 is set to be square, and the outside of the block 10 is slidably connected to the inside of the slot 11.

[0024] Specifically, by setting the desulfurization tower 1 and the limit block 8, desulfurization treatment and solid-liquid separation treatment can be carried out respectively, thereby achieving the reduction of sulfur dioxide emissions and the reuse of resources. The filter plate 4 installed inside the dust removal box 3 can filter out particulate matter mixed in the exhaust gas, reduce damage to the equipment during desulfurization, and improve the efficiency of the desulfurization reaction. By rotating the rotating rod 5, the pull rope 9 connected to both sides of its bottom is driven to shrink, so that the pull rope 9 drives the limit block 8 connected to the other end to slide inside the limit groove 6, and the limit groove 6 limits the movement of the limit block 8, thereby the spring 7 is pressed. The filter plate 4 can be removed from the dust collecting box 3 by pulling out the filter plate 4, thereby realizing the removal of the filter plate 4. The spring 7 can release the elastic potential energy to push the limit block 8 to move when the rotating rod 5 is loosened during the installation of the filter plate 4, so that the block 10 and the slot 11 are plugged in and matched. The longitudinal section of the block 10 is set to a square, so that the block 10 and the slot 11 are more firmly engaged and not easy to loosen. The filter plate 4 is installed by means of card connection, which is convenient for disassembly, replacement or cleaning of the filter plate 4, and reduces the maintenance cost.

[0025] Reference Figure 2The solid-liquid separation component includes a motor 17, which is fixedly connected to the top of the separation tank 18. The output end of the motor 17 is fixedly connected to a stirring rod 20, and the outside of the stirring rod 20 is fixedly connected to a plurality of stirring blades 19. A water pump 15 is fixedly connected to the outside side of the separation tank 18, and the output end of the water pump 15 is fixedly connected to an infusion tube 16, and the other end of the infusion tube 16 is connected to the through hole at the top of the separation tank 18. The input end of the water pump 15 is fixedly connected to a transfer tube 14. A feed port 23 is provided at the top of the separation tank 18, a discharge pipe 21 is provided at the outside side of the separation tank 18, and a discharge pipe 22 is provided at the bottom of the separation tank 18.

[0026] Specifically, a low-temperature organic amine-rich solution is added to the interior of the separation tank 18 through the feed port 23, and sodium ions in the ionic liquid under low temperature conditions are used to form sodium sulfate and sodium nitrite crystals. Then, the operation of the motor 17 drives the rotation of the stirring rod 20, and then the mixed solution is stirred by multiple stirring blades 19 to produce a centrifugal effect, so that the crystals and the liquid are separated. The desulfurized mixed solution in the desulfurization tower 1 can be transported through the transfer pipe 14 by the water pump 15, enter the infusion pipe 16 and then injected into the separation tank 18 for solid-liquid separation. The separated ionic liquid can be discharged through the discharge pipe 21, and then it can be re-injected into the desulfurization tower 1 for repeated use, thereby improving the utilization rate of resources. The precipitated crystals can be taken out through the discharge pipe 22 to facilitate subsequent processing.

[0027] Reference Figure 1 and Figure 3 The output end of the desulfurization circulation pump 12 is fixedly connected to a spray pipe 13 through a water pipe, and the spray pipe 13 is fixedly connected to the inner top of the desulfurization tower 1. The input end of the desulfurization circulation pump 12 is connected to a connecting point on one side of the bottom of the desulfurization tower 1 through a pipeline. A transfer pipe 14 is fixedly connected to the connecting point at the rear end of the bottom of the desulfurization tower 1, and the other end of the transfer pipe 14 is connected to the input end of the water pump 15.

[0028] Specifically, the desulfurization solution at the bottom of the desulfurization tower 1 can be extracted through the desulfurization circulation pump 12, transported to the top spray pipe 13 for spraying, and then fully mixed with the exhaust gas entering the desulfurization tower 1 to react and absorb the sulfur dioxide contained in the exhaust gas, thereby realizing the circulation desulfurization operation. The sulfate-containing ionic liquid is transported to the separation tank 18 through the transfer pipe 14 under the action of the water pump 15, and enters the solid-liquid separation operation, which can improve the utilization rate of resources.

[0029] Working principle: When using this device, the exhaust gas is passed through the air inlet pipe 2 and filtered by the filter plate 4 installed in the dust removal box 3, and then injected into the desulfurization tower 1. At this time, the desulfurization circulation pump 12 can be started. The desulfurization mixed solution at the bottom of the desulfurization tower 1 enters the spray pipe 13 through the operation of the desulfurization circulation pump 12, and then the desulfurization liquid is fully mixed with the exhaust gas through the spray pipe 13, and the sulfur dioxide contained in the exhaust gas is absorbed, thereby achieving the desulfurization effect and reducing the pollution of the exhaust gas to the environment. Then, the mixed ion liquid in the desulfurization tower 1 enters the desulfurization tower 1 through the operation of the water pump 15. The ionic liquid is introduced into the transfer tube 14 and injected into the interior of the separation tank 18 through the infusion tube 16. At this time, the motor 17 can be started, and the low-temperature organic amine rich solution is added from the feed port 23 at the same time. The sodium ions in the ionic liquid under low temperature conditions are used to form sodium sulfate and sodium nitrite crystals. Then, the operation of the motor 17 drives the rotation of the stirring rod 20, and then the mixed solution is stirred by multiple stirring blades 19 to produce a centrifugal effect, so that the crystals and the liquid are separated. Then, the ionic liquid can be taken out through the discharge pipe 21 for reuse, and the crystals can be discharged through the discharge pipe 22 for subsequent treatment.

[0030] If it is necessary to disassemble the filter plate 4 in the dust removal box 3, the rotating rod 5 can be rotated to drive the pull ropes 9 connected to the two sides of its bottom to shrink, so that the pull rope 9 drives the limit block 8 connected to the other end to slide inside the limit groove 6, thereby compressing the spring 7. At the same time, the limit block 8 drives the clamping block 10 to disengage from the clamping groove 11. At this time, the filter plate 4 can be pulled out from the inside of the dust removal box 3, thereby realizing the disassembly of the filter plate 4. The filter plate 4 is installed by clamping, which is convenient for disassembly, replacement or cleaning of the filter plate 4, reducing maintenance costs.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ionic liquid desulfurization device for tail gas treatment, comprising a desulfurization tower (1) and a separation tank (18), characterized in that: A dust removal box (3) is fixedly connected to one side of the outside of the desulfurization tower (1), an air intake pipe (2) is fixedly connected to the outside of the dust removal box (3), a filter plate (4) is installed inside the dust removal box (3), limiting grooves (6) are provided on both the left and right sides of the inside of the filter plate (4), a spring (7) is fixedly connected to one side of the inside of the limiting groove (6), a limiting block (8) is fixedly connected to the other end of the spring (7), a clamping block (10) is fixedly connected to one side of the limiting block (8), a pull rope (9) is fixedly connected to the other side of the limiting block (8), clamping grooves (11) are provided on both the left and right sides of the inside of the dust removal box (3), a desulfurization circulation pump (12) is fixedly connected to the other side of the outside of the desulfurization tower (1), and a solid-liquid separation component is provided inside the separation tank (18).

2. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: The solid-liquid separation component comprises a motor (17), the motor (17) is fixedly connected to the top of the separation tank (18), the output end of the motor (17) is fixedly connected to a stirring rod (20), the outside of the stirring rod (20) is fixedly connected to a plurality of stirring blades (19), the outside of the separation tank (18) is fixedly connected to a water pump (15), the output end of the water pump (15) is fixedly connected to an infusion tube (16), the other end of the infusion tube (16) is connected to a through hole at the top of the separation tank (18), and the input end of the water pump (15) is fixedly connected to a transfer tube (14).

3. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: The output end of the desulfurization circulation pump (12) is fixedly connected to a spray pipe (13) via a water pipe, and the spray pipe (13) is fixedly connected to the inner top of the desulfurization tower (1). The input end of the desulfurization circulation pump (12) is connected to a connecting point on one side of the bottom of the desulfurization tower (1) via a pipeline.

4. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: A transfer pipe (14) is fixedly connected to the bottom rear end connection of the desulfurization tower (1), and the other end of the transfer pipe (14) is connected to the input end of a water pump (15).

5. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: The top of the filter plate (4) is rotatably connected to a rotating rod (5), the bottom end of the rotating rod (5) is fixedly connected to one end of two pull ropes (9), and the outside of the pull ropes (9) is slidably connected to the inside of the filter plate (4).

6. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: The outside of the limiting block (8) is slidably connected to the inner wall of the limiting groove (6), and the outside of the spring (7) is slidably connected to the inner wall of the limiting groove (6).

7. The ionic liquid desulfurization device for tail gas treatment according to claim 2, characterized in that: The top of the separation tank (18) is provided with a feed port (23), the outer side of the separation tank (18) is provided with a liquid discharge pipe (21), and the bottom of the separation tank (18) is provided with a discharge pipe (22).

8. The ionic liquid desulfurization device for tail gas treatment according to claim 1, characterized in that: The longitudinal section of the card block (10) is arranged to be square, and the outside of the card block (10) is slidably connected to the inside of the card slot (11).

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