A spray tower dehumidification and demisting device

Abstract

The application discloses a kind of spray tower dehumidification and demisting device, it is related to waste gas treatment field, including tower body, in the inside of tower body from bottom to top sequentially formed spray section, transition section and demisting section, the inner diameter of demisting section is greater than the inner diameter of spray section, and the top of demisting section is the conical structure of big lower and small upper, and its top center is provided with air outlet;From bottom to top in demisting section is sequentially provided with dehumidification filler, water retaining mechanism, water retaining mechanism includes the water retaining plate of section V type, water retaining bracket that water retaining plate is fixed in the inner wall of demisting section, the bottom of this water retaining plate is provided with hole, to prevent water accumulation in the groove formed by water retaining plate, water retaining plate is composed of lower glass steel plate and upper iron wire net plate;The conical surface on the top of demisting section is distributed with several baffle plates, and the baffle plate and the conical inner wall of the conical surface of demisting section are conical included angle.The removal efficiency of water mist can reach more than 90%, while reducing the interference influence of condensation water droplets on waste gas.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment, and in particular to a spray tower dehumidification and demisting device. Background Technology

[0002] Waste gas scrubbing towers are generally used to scrub, wash, purify, and absorb solid particulate matter and volatile pollutants in industrial exhaust gases or waste gases. They typically serve as the front-end pretreatment equipment in a complete waste gas treatment system, playing an important role and having a wide range of applications.

[0003] The principle is to transfer harmful components in the waste gas to the circulating water through counter-current contact between the waste gas and the circulating water. During the water washing process, the circulating water is pumped into the spray system by a high-pressure water pump. The spray system atomizes the circulating water through spiral nozzles. The atomized circulating water comes into counter-current contact with the waste gas for purification. Therefore, the purified waste gas contains a large amount of water mist. As a result, existing technologies generally install a dehumidification and demisting device at the top of the spray tower. However, in existing devices, due to the fixed wind speed of the waste gas in the tower, the short residence time of the waste gas passing through the dehumidification system and the fast filtration speed result in poor dehumidification effect. This leads to some water accumulation in the subsequent treatment system or fan, affecting the purification effect and the service life of the equipment.

[0004] In 2017, the applicant disclosed a dehumidification device for an exhaust gas purification tower with patent number 201621249315.0. The device's structure includes: an exhaust gas containment chamber, an air inlet located on the exhaust gas containment chamber, a spray purification chamber located on the exhaust gas containment chamber, a demisting chamber located on the spray purification chamber, an air outlet located at the upper end of the demisting chamber, and an air outlet located on the air outlet chamber. The spray purification chamber comprises: a purification chamber body, a dehumidifying packing support located at the bottom of the purification chamber body, dehumidifying packing filling on the dehumidifying packing support, and a spray assembly located at the upper end of the purification chamber body. This device can reduce the filtration velocity of the tower body and increase the collision contact area between the purified exhaust gas and the dehumidifying multi-faceted spheres. Through collision contact, most of the water mist in the exhaust gas condenses into small water droplets. Due to the slow air velocity inside the tower, the condensed water droplets fall due to their own gravity, achieving the purpose of dehumidification. The water mist removal efficiency can reach over 85%.

[0005] This application further optimizes and improves the structure to increase the water mist removal efficiency to over 90%. In the above structure, water mist condenses into water droplets, falls into the dehumidifying packing, and is then discharged downwards. In this process, firstly, it is easy to cause blockage and affect the flow of exhaust gas; secondly, due to the high wind speed, some of the water droplets that fall off will still return to the airflow, causing secondary water carryover and reducing the demisting efficiency. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide a spray tower dehumidification and demisting device that can remove water mist with an efficiency of over 90% while reducing the interference of condensed water droplets on exhaust gas.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by the present invention includes:

[0008] A spray tower dehumidification and demisting device includes a tower body, a spray section, a transition section, and a demisting section formed sequentially from bottom to top inside the tower body. The demisting section has an inner diameter larger than that of the spray section, and its top is a conical structure with a wider bottom and a narrower top, with an air outlet at its center. The demisting section contains, from bottom to top, dehumidifying packing and a water-blocking mechanism. The water-blocking mechanism includes a V-shaped water-blocking plate and a water-blocking bracket that fixes the water-blocking plate to the inner wall of the demisting section. The bottom of the water-blocking plate has a hole to prevent water from accumulating in the groove formed by the water-blocking plate. The water-blocking plate is composed of a lower fiberglass plate and an upper wire mesh plate. Several baffles are arranged on the conical surface at the top of the demisting section, and the baffles form a conical angle with the inner wall of the conical surface of the demisting section.

[0009] A further improvement of the present invention is that the angle between the baffle plate and the inner wall of the conical surface of the demisting section is 45°-60°.

[0010] A further improvement of the present invention is that the demisting section is provided with a dehumidification support for supporting the dehumidification packing.

[0011] A further improvement of the present invention is that a flow channel is provided along the length direction on the inner wall of the demisting section that is perpendicular to the horizontal plane. The flow channel is provided in a plurality of such channels and is evenly distributed at intervals along the circumference of the inner wall of the demisting section, so that water droplets can flow down from the inner wall of the demisting section to the spraying section.

[0012] A further improvement of the present invention is that a bowl-shaped flow-receiving groove is provided at the top center of the dehumidifying packing, the flow-receiving groove is directly opposite the bottom of the baffle plate, and a water pipe is provided at the bottom of the flow-receiving groove. One end of the water pipe is connected to the flow-receiving groove, and the other end extends downward 1-2cm through the dehumidifying packing. The flow-receiving groove is used to collect water droplets dripping from the baffle plate and guide them to the spray section.

[0013] A further improvement of the present invention is that the transition section is a tapered structure with a smaller bottom and a larger top.

[0014] A further improvement of the present invention is that a spray assembly and a swirl plate are arranged from bottom to top in the spray section. The rising airflow passes through the swirl plate to form a rotation and centrifugal effect, so that the airflow and the mist can come into full contact.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention reduces the filtration velocity of the tower and increases the collision contact area between the purified exhaust gas and the dehumidifying multifaceted spheres. Through this collision contact, most of the water mist in the exhaust gas condenses into small water droplets. By setting up a water-blocking mechanism, this invention can, on the one hand, slow down the airflow, use the wire mesh plate to defogging and distribute the airflow, and use the fiberglass plate to guide the formed water droplets to the flow-receiving groove for discharge. On the other hand, it can guide the airflow towards the inner wall of the defogging section, so that the airflow is slowed down and forms water droplets at the baffle plate, and flows downward from the inner wall, thus achieving the purpose of removing water mist. The water mist removal efficiency can reach over 90%. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the AA-direction structure.

[0019] In the diagram: 1. Tower body; 2. Spray section; 3. Transition section; 4. Demisting section; 5. Air outlet; 6. Dehumidifying packing; 7. Water baffle mechanism; 7.1. Water baffle plate; 7.2. Fiberglass plate; 7.1.1. Wire mesh plate; 7.1.2. Baffle plate; 8. Dehumidifying support; 9. Diversion channel; 10. Flow receiving channel; 11. Water pipe; 12. Spray assembly; 13. Swirl plate; 14. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0021] like Figure 1-2 As shown, a spray tower dehumidification and demisting device includes a tower body 1, a spray section 2, a transition section 3, and a demisting section 4 formed sequentially from bottom to top inside the tower body 1. The demisting section 4 has an inner diameter larger than that of the spray section 2, and its top is a conical structure with a larger bottom and a smaller top, with an air outlet 5 at its center. The demisting section 4 contains, from bottom to top, dehumidifying packing 6 and a water-blocking mechanism 7. The water-blocking mechanism 7 includes a V-shaped water-blocking plate 7.1 and a water-blocking bracket 7.2 that fixes the water-blocking plate 7.1 to the inner wall of the demisting section 4. The bottom of the water-blocking plate 7.1 has a hole to prevent water from accumulating in the groove formed by the water-blocking plate 7.1. The water-blocking plate 7.1 is composed of a lower fiberglass plate 7.1.1 and an upper wire mesh plate 7.1.2. Several baffle plates 8 are arranged on the conical surface at the top of the demisting section 4, forming a conical angle with the inner wall of the conical surface of the demisting section 4.

[0022] Specifically, the angle between the baffle plate 8 and the inner wall of the conical surface of the demisting section 4 is 45°-60°.

[0023] Specifically, the demisting section 4 is equipped with a dehumidification bracket 9 for supporting the dehumidification packing 6.

[0024] Specifically, a flow channel 10 is provided on the inner wall of the demisting section 4, which is perpendicular to the horizontal plane, along the length direction. Several flow channels 10 are provided and are evenly distributed around the inner wall of the demisting section 4 so that water droplets can flow down from the inner wall of the demisting section 4 into the spraying section 2.

[0025] Specifically, a bowl-shaped flow-receiving groove 11 is provided at the top center of the dehumidifying packing 6. The flow-receiving groove 11 is directly opposite the bottom of the baffle plate 7.1. A water pipe 12 is provided at the bottom of the flow-receiving groove 11. One end of the water pipe 12 is connected to the flow-receiving groove 11, and the other end passes through the dehumidifying packing 6 and extends downwards by 1-2 cm. The flow-receiving groove 11 is used to collect water droplets dripping from the baffle plate 7.1 and guide them to the spray section 2.

[0026] Specifically, transition section 3 is a conical structure with a smaller bottom and a larger top.

[0027] Specifically, spray assembly 13 and swirl plate 14 are arranged from bottom to top in spray section 2. The rising airflow passes through swirl plate 14 to form a rotation and centrifugal effect, so that the airflow and mist can fully contact each other.

[0028] The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A spray tower dehumidification and demisting device, comprising a tower body, a spray section, a transition section, and a demisting section formed sequentially from bottom to top inside the tower body, characterized in that, The inner diameter of the demisting section is larger than that of the spray section. The top of the demisting section is a conical structure that is wider at the bottom and narrower at the top, with an air outlet at the center of the top. From bottom to top, the demisting section contains dehumidifying filler and a water-blocking mechanism. The water-blocking mechanism includes a V-shaped water-blocking plate and a water-blocking bracket that fixes the water-blocking plate to the inner wall of the demisting section. The bottom of the water-blocking plate has a hole to prevent water from accumulating in the groove formed by the water-blocking plate. The water-blocking plate consists of a lower fiberglass plate and an upper wire mesh plate. A bowl-shaped flow-receiving groove is located at the center of the top of the dehumidifying filler, directly opposite the bottom of the water-blocking plate. A water pipe is located at the bottom of the flow-receiving groove, with one end connected to the flow-receiving groove and the other end extending downwards 1-2 cm through the dehumidifying filler. Several baffles are arranged on the conical surface at the top of the demisting section, forming a conical angle with the inner wall of the conical surface of the demisting section.

2. The spray tower dehumidification and demisting device according to claim 1, characterized in that, The angle between the baffle and the inner wall of the conical surface of the demisting section is 45°-60°.

3. The spray tower dehumidification and demisting device according to claim 1, characterized in that, The demisting section is equipped with a dehumidification support for supporting the dehumidification packing.

4. The spray tower dehumidification and demisting device according to claim 1, characterized in that, The inner wall of the demisting section, which is perpendicular to the horizontal plane, is provided with a flow channel along its length. The flow channel is provided in a plurality of places and is evenly distributed around the inner wall of the demisting section.

5. The spray tower dehumidification and demisting device according to claim 1, characterized in that, The transition section is a tapered structure that is smaller at the bottom and larger at the top.

6. The spray tower dehumidification and demisting device according to claim 1, characterized in that, The spray section is equipped with spray components and swirl plates arranged from bottom to top.

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