CN112169449A - A high-efficiency double-coil bundle dust and mist eliminator - Google Patents

Abstract

The invention discloses a high-efficiency double-rotary tube bundle dust and mist removal device which comprises a single double-rotary tube bundle and sealing plates, wherein the sealing plates are symmetrically connected to the upper end and the lower end of the single double-rotary tube bundle, the single double-rotary tube bundle comprises an outer barrel, a spiral rifling and a spiral auger, the upper end and the lower end of the outer barrel are respectively provided with three fixing seats, the inner wall of the outer barrel is provided with the spiral rifling and a water running groove, the outer circle of the spiral rifling is tightly attached to the inner circle of the outer barrel to prevent scale collection, the spiral auger is arranged in the spiral rifling, the center of the spiral auger is integrally connected with a rotary rod, and the spiral auger is provided with two pieces. Compared with the prior art, the invention has the advantages that: the dust removal and demisting efficiency is high, the operation cost is low, the modification and installation period is short, the investment cost is low, the operation cost is saved, and the economical efficiency is good; the installation and maintenance are convenient, and all parts of the equipment can be disassembled, maintained and cleaned.

Description

A high-efficiency double-coil bundle dust and mist eliminator

technical field

The invention relates to the technical field of flue gas purification of an absorption tower, in particular to a high-efficiency double-coiled tube bundle dust-removing and mist eliminator.

Background technique

The problem of the existing process equipment is that the dust emission does not meet the requirements of the new standard, and most ^of the desulfurization equipment has a serious "gypsum rain" problem. When the electrostatic precipitator transformation + desulfurization tower transformation + mist eliminator transformation is adopted; when the required dust at the outlet of the absorption tower is less than 5mg/ ^Nm3 , the electrostatic precipitator transformation + desulfurization tower transformation + demister transformation + wet electrostatic precipitator is adopted. However, the disadvantages of these solutions are high investment, high operating cost, long reconstruction period and great difficulty.

The traditional mist eliminator relies on the inertial impact and gravity of the mist droplets in the flue gas as its working principle, and the design flow rate is generally selected between 3.0 and 4.5m/s. The working principle and operating flow rate of the reentrant mist eliminator determine the removal of fine droplets and dust particles in the flue gas, and the efficiency is high. The efficiency of demisting is reduced. The traditional mist eliminator has high limitations and high working conditions. For dust, it can only remove particulate dust combined with droplets. For example, dry dust cannot be released, resulting in excessive dust emission.

Wet electrostatic precipitator relies on the principle of electro-adsorption, which has great engineering difficulty, long reconstruction period, large area, large investment, high operating cost and high maintenance cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above technical defects, and to provide a high-efficiency double-coiled tube bundle dust-removal and demister, which has high dust-removal and demist-removal efficiency, reaching below 5mg/ ^Nm3 ; completely eliminates gypsum rain, has low operation cost, and does not increase additional operation. Cost; only need to use the original absorption tower space for renovation without changing the external structure of the absorption tower; the renovation and installation period is short, and the renovation can be completed within a week; the investment cost is low, the operation cost is low, and the economy is good; the installation and maintenance are convenient, and the equipment can be All parts are dismantled, repaired and cleaned up; the traditional flat panel, roof ridge, tube bundle, and the complex structure of dust removal and defogger installation and maintenance are broken.

In order to solve the above-mentioned technical problems, the technical solution provided by the present invention is: a high-efficiency double-coiled tube bundle dust and mist eliminator, comprising a single double-coiled tube bundle and a sealing plate, and the sealing plate is symmetrically connected to the upper and lower ends of the single double-coiled tube bundle. , the single double-coiled tube bundle includes an outer cylinder, a spiral rifling and a spiral auger, the upper and lower ends of the outer cylinder are respectively provided with three fixing seats, and the fixing seats are provided with self-tapping screws to connect the upper and lower seals The bolt hole of the plate, the top of the outer cylinder is a through hole, the bottom is evenly arranged with support rods, the inner wall of the outer cylinder is provided with a spiral rifling and a water running groove, and the outer circle of the spiral rifling is close to the inner circle of the outer cylinder. To prevent fouling, the spiral rifling is distributed with 11 evenly spaced, effectively draining the separated droplets. A single spiral rifling rotates 360 degrees and rotates once on the inner wall of the outer cylinder. The spiral rifling can be disassembled to clean the internal dust and dirt, and then installed and used again. The spiral rifling is provided with a spiral auger, the center of the spiral auger is integrally connected with a rotating rod, and the spiral auger is provided with two pieces. And cross-connected on the rotating rod, the single-piece auger rotates 900 degrees around the rotating rod and rotates 2.5 circles around the rotating rod, the outer circle of the auger is close to the inner circle of the spiral rifling, and the auger is detachable Clean up the internal dust and dirt and install it again.

Further, the rotation direction of the spiral rifling is counterclockwise at an angle of 45°.

Further, the rotation direction of the spiral auger is clockwise at an angle of 45°.

Further, the single double coil bundle and the sealing plate are made of corrosion-resistant and high-temperature resistant materials.

Further, a circular support block is arranged at the center of the bottom surface of the outer cylinder, and both ends of the support rod are connected to the inner wall of the outer cylinder and the inner wall of the circular support block.

Compared with the prior art, the present invention has the advantages that: the present invention has high dust removal and demisting efficiency, reaching below 5 mg/m ³ ; completely eliminates gypsum rain, has low operating cost, and does not increase additional operating costs; only needs to use the original absorption tower The space is transformed without changing the external structure of the absorption tower; the transformation and installation period is short, and the transformation can be completed within a week; the investment cost is low, the operation cost is low, and the economy is good; the installation and maintenance are convenient, and all parts of the equipment can be disassembled, repaired and cleaned; The installation and maintenance structure of the flat plate, roof ridge, tube bundle, dust removal and mist eliminator is complicated and limited; the contact surface between the spiral auger and the flue gas is large, the gas centrifugal force is strong, and it can be disassembled to clean the internal dirt. It mainly collects droplets and dust to prevent secondary entrainment from contact with high-speed flue gas. The structural design can also be disassembled for maintenance and cleaning. The equipment is made of modules and blocks without plastic welding. High support strength, corrosion resistance and high temperature resistance, completely avoid the traditional mist eliminators encountering high temperature blades Deformation module structural parts fall off and collapse.

Description of drawings

Figure 1 is a schematic diagram of the structure of a traditional mist eliminator.

Figure 2 is a side view of the present invention installed in the desulfurization tower body.

Figure 3 is a front view of the layout of the present invention installed in the desulfurization tower.

Figure 4 is a top plan view of the present invention installed in the desulfurization tower body.

FIG. 5 is a schematic diagram of the structure of the present invention.

Figure 6 is a schematic structural diagram of the present invention.

FIG. 7 is a schematic diagram of a part of the structure of the present invention.

FIG. 8 is a schematic diagram of the bottom surface structure of the present invention.

FIG. 9 is a schematic diagram of the assembled structure of the present invention.

As shown in the picture: 1. Outer cylinder, 3. Spiral rifling, 4. Running water tank, 5. Rotating rod, 6. Spiral auger, 7. Fixed seat, 8. Bolt hole, 9. Support rod, 10. Circle shaped support block, 11, sealing plate.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

A high-efficiency double-coiled tube bundle dust and mist eliminator, comprising a single double-coiled tube bundle and a sealing plate 11, the sealing plate 11 is symmetrically connected to the upper and lower ends of the single double-coiled tube bundle, and the single double-coiled tube bundle includes an outer cylinder. 1. The spiral rifling 3 and the spiral auger 6, the upper and lower ends of the outer cylinder body 1 are respectively provided with three fixing seats 7, and the fixing seats 7 are provided with bolt holes 8 for self-tapping screws to connect the upper and lower sealing plates 11 , the top of the outer cylinder 1 is a through port, the bottom is evenly arranged with support rods 9, the inner wall of the outer cylinder 1 is provided with a spiral rifling 3 and a water running groove 4, and the outer circle of the spiral rifling 3 is close to the outer cylinder. The inner circle of the body 1 prevents fouling, and the spiral rifling 3 is distributed with 11 evenly spaced, effectively draining the separated mist droplets. The spiral rifling 3 inside the outer cylinder body 1 can be disassembled to clean the internal dust and dirt and then be installed and used again. Rod 5, the screw auger 6 is provided with two pieces and is cross-connected on the rotating rod 5. The single-piece screw auger 6 rotates 900 degrees around the rotating rod 5 and rotates 2.5 circles around the rotating rod 5. The outer circle of the dragon 6 is close to the inner circle of the spiral rifling 3, and the spiral auger 6 can be disassembled to clean the internal dust and dirt and then be installed and used again.

The rotation direction of the spiral rifling 3 is counterclockwise at a 45° angle.

The rotation direction of the spiral auger 5 is clockwise at an angle of 45°.

The single double coil bundle and the sealing plate 11 are all made of corrosion-resistant and high-temperature resistant materials.

A circular support block 10 is provided at the center of the bottom surface of the outer cylinder 1 , and both ends of the support rod 9 are connected to the inner wall of the outer cylinder 1 and the inner wall of the circular support block 10 .

Principle: 1. Structural principle: The high-efficiency double coil bundle is composed of 3 structures: outer cylinder, spiral rifling, and spiral auger. The inner wall of the outer cylinder is smooth, the cylinder is vertical, the section is smooth, and there is no eccentricity; The spiral design ensures that the separated dust and mist droplets fall into the slurry tank along the spiral rifling, preventing the collision of high-velocity flue gas and falling dust droplets to form secondary entrainment; the spiral auger is designed for centrifugal positive rotation, so that the flue gas enters the spiral twister. The dragon forms a high-speed centrifugal force, so that the droplet dust contained in the flue gas expands outward, breaks away from the flue gas and enters the spiral rifling, and runs down the water tank along the rifling and enters the slurry pool to achieve the effect of dust removal and fog removal; The operating environment of the tube bundle dedusting and demister is a saturated net smoke of ^~ 80 ℃ that contains a large number of droplets and dust. It is characterized by a large amount of droplets and a wide range of droplet particle size distribution. Composition; Dedusting and defogging is mainly to remove slurry droplets and dust particles. The transformation period is short and the maintenance is convenient. The spiral auger can be removed for maintenance and cleaning at will, and it can be installed directly without changing the original demister support beam structure; 3. Small fog Coagulation of droplets and particles: a large number of fine droplets and dust particles in the flue gas under the condition that the spiral auger airflow is redirected to high-speed motion, the droplet dust in the flue gas achieves gravity dispersion collision, and the droplet dust is separated into the running water tank to agglomerate and aggregate into large particles , so as to realize the separation from the gas phase; 3. Capture of large droplets and liquid film: the droplet dust is separated into the spiral rifling and the liquid film of the running water tank will capture the fine droplets that touch its surface, and the spiral rifling is designed for reverse rotation. The high-speed airflow cannot contact the mist droplets, resulting in secondary entrainment. The mist droplets and dust in the running water tank fall into the slurry pool smoothly; 4. Equipment structure and configuration characteristics: the spiral auger has a large contact surface with the flue gas, and the gas centrifugal force is strong, and it can be disassembled. Cleaning the internal dirt in the secondary installation has a long service life and is easy to install and maintain. The spiral rifling mainly collects the droplet dust and prevents the secondary entrainment from contact with the high-speed flue gas. The structural design can also be disassembled for maintenance and cleaning. The equipment is made of modules without plastic. 316L self-tapping bolts are used for welding, and the assembly is high in strength, corrosion-resistant and high-temperature resistant.

In the specific implementation, the use environment is 20 ℃ ~ 80 ℃ saturated clean flue gas containing a large number of droplets and dust, which is characterized by a large amount of droplets and a wide range of droplet particle size distribution. Composition: Dust removal and fog removal is mainly to remove slurry droplets and dust particles. The desulfurization flue gas contains a large number of fine droplets and dust particles, which enter the spiral auger airflow direction to generate high-speed centrifugal force. Realize gravity dispersion collision to separate the droplet dust into the spiral rifling running water tank to condense into large particle droplets and fall to the slurry tank under the condition of gravity, so as to achieve the effect of gas-liquid separation. The design flow rate is between 4.0 and 8.0m/s. The range of the flow rate is wide and the limitations are small. The higher the flow rate, the better the dust removal and demisting effect. There is no need to worry that the high flow rate will cause the secondary entrainment of droplets and dust to solve the problem of excessive emission.

The present invention and its embodiments have been described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it, and without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, and all should belong to the protection scope of the present invention.

Claims (5)

1. A high-efficiency double-coiled tube bundle dedusting and mist eliminator is characterized in that: comprising a single double-coiled tube bundle and a sealing plate (11), and the sealing plate (11) is symmetrically connected to the upper and lower ends of the single double-coiled tube bundle, so that the The single double coil bundle includes an outer cylinder (1), a spiral rifling (3) and a helical auger (6). The upper and lower ends of the outer cylinder (1) are respectively provided with three fixing seats (7). There are bolt holes (8) on the fixing seat (7) for self-tapping screws to connect the upper and lower sealing plates (11). The inner wall of the outer cylinder body (1) is provided with a spiral rifling (3) and a water running groove (4). The spiral rifling (3) is distributed with 11 evenly spaced, effectively draining the separated droplets. A single spiral rifling (3) rotates 360 degrees and rotates once on the inner wall of the outer cylinder (1). The spiral rifling (3) inside the cylinder body (1) can be disassembled to clean the internal dust and dirt, and then re-installed and used. The spiral rifling (3) is provided with a spiral auger (6), and the spiral auger (6) ) center is integrally connected with a rotating rod (5), the screw auger (6) is provided with two pieces and is cross-connected on the rotating rod (5), and the single-piece screw auger (6) rotates around the rotating rod (5). 900 degrees and rotate 2.5 circles around the rotating rod (5), the outer circle of the spiral auger (6) is close to the inner circle of the spiral rifling (3), and the spiral auger (6) can be disassembled to clean the internal dust and dirt. Secondary installation and use. 2 . The high-efficiency double-coil bundle dust and mist eliminator according to claim 1 , wherein the rotation direction of the spiral rifling ( 3 ) is a 45° counterclockwise rotation. 3 . 3. A kind of high-efficiency double-coiled tube bundle dust and mist eliminator according to claim 1, characterized in that: the rotation direction of the spiral auger (5) is clockwise at a 45° angle. 4. A high-efficiency double-coiled tube bundle dust and mist eliminator according to claim 1, characterized in that: the single double-coiled tube bundle and the sealing plate (11) are made of corrosion-resistant and high-temperature resistant materials. 5. A high-efficiency double-coiled tube bundle dust and mist eliminator according to claim 1, characterized in that: a circular support block (10) is provided at the center of the bottom surface of the outer cylinder (1), and the support Both ends of the rod (9) are connected to the inner wall of the outer cylinder (1) and the inner wall of the circular support block (10).

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