CN102350156B - High-efficiency and low-resistance gas scrubbing and absorption device - Google Patents

Abstract

The invention relates to a high-efficiency and low-resistance gas washing and absorbing device. The existing device has complex structure, large volume, high cost and large resistance. In the present invention, a nozzle spraying system is arranged on the upper part of a rectangular gas pipeline, and a gas distribution plate parallel to the axis of the gas pipeline is arranged below the nozzle, and an airflow diversion plate forming a certain angle with the gas distribution plate is connected to the bottom, and the airflow diversion plate is below the It is a vortex plate with a certain radius of curvature and a central angle connected tangentially to the airflow turning plate, and the airflow guiding plate is connected under the vortex plate; the airflow distribution plate, the airflow turning plate, the vortex plate and the airflow guiding plate form a mixed Washing plate system: Multiple mixed washing plate systems are evenly distributed in the rectangular gas pipeline at equal intervals and heights. Multiple mixed washing plate systems, rectangular gas pipelines, and spray systems together constitute an efficient and low-resistance gas washing and absorbing device. The invention has the advantages of simple structure, small volume, convenient manufacture and installation, small resistance, high washing and absorption efficiency, and low investment and operation cost.

Description

A high-efficiency and low-resistance gas scrubbing and absorbing device

technical field

The invention relates to a high-efficiency and low-resistance gas washing and absorbing device, which is mainly used in dust removal and desulfurization of boiler flue gas, separation of industrial gas components, recovery or absorption and purification of industrial waste gas, purification of kitchen oil fume and the like.

Background technique

At present, gas scrubbing and absorbing devices mainly include packed absorbing towers, spray towers, Venturi tubes, impinging flow mixing and absorbing devices, cyclone or eddy current scrubbing and absorbing devices, etc., and these devices have their own advantages and scope of application. However, they all have the disadvantages of complex structure, large volume, high cost, and large resistance. The energy consumption in the process of gas washing and absorption is relatively high, especially for industrial waste gas with low concentration and little recycling value, flue gas from small and medium-sized boilers, etc. Kitchen fumes, etc., their disadvantages of high investment and operation costs are even more prominent, and they are not suitable for working conditions where the gas flow fluctuates greatly and the airflow contains dust.

Contents of the invention

In order to overcome the shortcomings of common gas washing and absorbing devices, such as large volume, high investment and operation cost, large resistance, and limited application range, the present invention provides a gas scrubber with simple structure, low cost, small resistance, suitable for large fluctuations in gas volume, and high efficiency. Wash the absorbent unit.

The invention adopts the Venturi structure, uses the flue structure to compress the gas-liquid mixed flow, and then speeds up to form a turbulent mixing principle, and utilizes the gas-liquid vortex mixing principle and the mixing principle of impinging flow.

The high-efficiency and low-resistance gas scrubbing and absorbing device is to install a solid cone spray atomization system on the upper part of the rectangular gas pipeline. A gas flow distribution plate parallel to the centerline of the gas pipeline is set at a certain distance below the nozzle. An airflow guide plate with a certain angle, connected below the airflow guide plate is a vortex plate with a certain radius of curvature and a central angle tangent to the airflow guide plate, and the airflow guide plate parallel to the center line of the gas pipeline is welded under the vortex plate. An air distribution plate, an air guide plate, a vortex plate, and an air flow guide plate are connected in the above order and manner to form a mixed washing plate system, and the space between two mixed washing plate systems with a certain distance forms a Special air flow channels for efficient gas-liquid mixing. Multiple mixing wash plate systems can be arranged in a gas pipeline with a rectangular cross-section. They are arranged at equal heights in the height direction and at equal intervals in the horizontal direction. Determine the shape and size of the board. The air flow channel formed between two adjacent mixed washing plate systems comprehensively uses the mixing principles of Venturi turbulent flow, impact flow and vortex flow. When the gas-liquid mixed fluid passes through the airflow channel between the two plate systems, it will go through the processes of boosting and deceleration, vortex, impact, decompression and acceleration, etc., thereby increasing the gas-liquid mixing time and strengthening the gas-liquid or gas-liquid Solid contact blending effect. Multiple mixed washing plate systems, rectangular gas pipes, spray systems and two flanges together constitute an efficient and low-resistance gas washing absorption device.

The invention is a high-efficiency and low-resistance gas washing and absorbing device without moving parts. It has simple structure, small volume, convenient manufacture and installation, small resistance, high washing and absorption efficiency, low investment and operation cost, and is suitable for dust-containing gas and large gas flow fluctuations. gas scrubbing absorption. The present invention comprehensively utilizes the principle of Venturi tube washing and mixing, vortex and impinging flow mixing, and realizes it through a special air flow channel composed of multiple mixing washing plate systems and rectangular gas pipelines, thereby achieving sufficient gas-liquid mixing and contact, washing and absorption efficiency high.

Description of drawings

Fig. 1 is a schematic diagram of the high-efficiency and low-resistance gas scrubbing and absorbing device of the present invention;

Fig. 2 is the effect diagram of the high-efficiency and low-resistance gas scrubbing and absorbing device of the present invention;

Fig. 3 is a schematic diagram of the 90° elbow type of the high-efficiency and low-resistance gas scrubbing and absorbing device of the present invention.

Detailed ways

Referring to Fig. 1 and Fig. 2, the high-efficiency and low-resistance gas scrubbing and absorbing device of the present invention is provided with a nozzle spraying system 3 on the upper part of the rectangular gas pipeline 2 connected to the flange 1, spraying and atomizing the absorption liquid, and a certain distance H below the nozzle A gas distribution plate 4 parallel to the axis of the gas pipeline 2 is arranged. The length of the gas distribution plate 4 is L1, and the air flow diversion plate 5 forming a certain angle α with the gas distribution plate 4 is connected below it. The length of the air flow diversion plate 5 is L2. Below the turning plate 5 is a vortex plate 6 with a certain radius of curvature r and a central angle β that is tangentially connected to the airflow turning plate 5. Below the vortex plate 6 is connected an airflow guide plate 7 with a length of L3, and the gas guide plate 7 Parallel to the center line of the gas pipeline 2. An airflow distribution plate 4, an airflow diversion plate 5, a swirl plate 6, and an airflow guide plate 7 have their respective sizes and shapes, and are connected together in sequence and orientation to form a mixed washing plate system. The space between two mixing wash plate systems with a minimum distance d forms a special gas flow channel for efficient gas-liquid mixing. Multiple mixing wash plate systems can be arranged in a gas pipeline with a rectangular cross-section. They are arranged at equal heights in the height direction and at equal intervals in the horizontal direction. , The shape and size of the vortex plate 6 are determined. The air flow channel formed between two adjacent mixed washing plate systems comprehensively uses the mixing principles of Venturi turbulent flow, impact flow and vortex flow. When the gas-liquid mixed fluid passes through the airflow channel between the two plate systems, the continuous conversion between the dynamic and static pressure of the fluid is realized due to the special structure of the airflow channel. process. Under the action of the turning plate 5 and the vortex plate 6, part of the air flow is vortexed, and part of the air flow collides with the vortex gas, thereby increasing the gas-liquid mixing time and strengthening the gas-liquid or gas-liquid-solid contact mixing effect. A plurality of mixed washing plate systems, a rectangular gas pipeline 2, a spray system 3 and two flanges 1 together constitute a high-efficiency and low-resistance gas washing and absorbing device. The length of the airflow turning plate 5, the arc length of the vortex plate 6, the distance between two adjacent mixed washing plate systems and the special relationship between them are the key dimensions of the device of the present invention.

The vertical distance H from the spray pipe axis to the gas distribution plate (4) is 300-500 mm, the length L1 of the gas distribution plate (4) is 280-320 mm, and the length L2 of the airflow turning plate (5) is (2.0 ~4.0)×L1, the angle α between the gas distribution plate (4) and the airflow turning plate (5) is 14°±1°, the radius of curvature r of the vortex plate (6) is 50mm±2mm, and the central angle β The size is 120°±2°, and the minimum distance between adjacent mixed wash plate systems is d=r+5mm.

Referring to Fig. 3, the high-efficiency and low-resistance gas scrubbing and absorbing device of the present invention can be flexibly configured, made into a 90° elbow type, and the mixed scrubbing plate system is arranged at equal intervals and equal heights, and other parameters remain unchanged.

Claims (2)

1. an efficient low-resistance strength body washs absorption plant, it is characterized in that: rectangle gas pipeline (2) top that connects at flange (1) arranges nozzle spray system (3), spray atomizing absorption liquid; Nozzle below certain distance H arranges the gas distribution grid (4) parallel with gas pipeline (2) axis, gas distribution grid (4) length is L1, the below connects is and the form an angle air-flow deflecting plate (5) of α of gas distribution grid (4), air-flow deflecting plate (5) length is L2, air-flow deflecting plate (5) below is and the tangent scroll plate (6) that certain curvature radius r and central angle β are arranged that is connected of air-flow deflecting plate (5), scroll plate (6) below connects air-flow guiding plate (7), and air-flow guiding plate (7) length is L3; A gas distribution grid (4), an air-flow deflecting plate (5), a scroll plate (6), an air-flow guiding plate (7) are linked in sequence together from top to bottom successively, form a mixing, washing plate system; Equidistant contour being distributed in the rectangle gas pipeline (2) of a plurality of mixing, washing plate systems, minimum range between two adjacent mixing, washing plate systems is d, and a plurality of mixing, washing plate system, rectangle gas pipeline (2), spray system (3) have constituted efficient low-resistance strength body washing absorption plant jointly.

2. efficient low-resistance strength body according to claim 1 washs absorption plant, it is characterized in that: the spray piping axis is 300～500mm to the vertical range H value of gas distribution grid (4), gas distribution grid (4) length L 1 value is 280～320mm, air-flow deflecting plate (5) length L 2 values are 2L1～4L1, gas distribution grid (4) is 14 ° ± 1 ° with the angle α size of air-flow deflecting plate (5), the radius of curvature r size of scroll plate (6) is 50mm ± 2mm, central angle β size is 120 ° ± 2 °, and the minimum range between the adjacent mixing, washing plate system is d=r+5mm.

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