CN205730730U - A kind of multitube Venturi - Google Patents

Abstract

The utility model discloses a kind of multitube Venturi, support card including multitube venturi upper face plate, multitube venturi and be fixedly arranged on the some Venturi tubes between multitube venturi upper face plate and multitube venturi support card, described Venturi tube is perpendicular to horizontal plane and arranges, described Venturi tube includes collapsible tube, trunnion and anemostat the most successively, described collapsible tube is fixedly arranged on multitube venturi and supports card upper surface, described anemostat is fixedly arranged on multitube venturi upper face plate lower surface, is equipped with serosity shower nozzle in the trunnion of some described Venturi tubes.The radial direction serosity that during work, flue gas sprays with the hole for water spraying of multitube venturi spray pipe network with high velocity stream flow through venturi throat mixes, simultaneously, gas is completely saturated by solution institute, the air film of grit surface attachment is broken through, grit is made to be readily wetted by water, meanwhile in flue gas, SO2 air film increases with absorbent liquid film touch opportunity, and mass tranfer coefficient becomes big desulfurized effect and promotes.

Description

A multi-tube venturi device

technical field

The utility model relates to the technical field of desulfurization and dust removal, in particular to a multi-tube Venturi device.

Background technique

Desulfurization equipment is a kind of purification equipment that discharges dust, waste gas and other harmful substances in the field of industrial production. At present, the wet flue gas desulfurization purification equipment generally consists of a tower body and one to three layers of spraying devices and demisting devices in the tower body. The tower body is a whole body from bottom to top. After the flue gas enters the tower body, it quickly reaches the top of the tower. The contact time between the flue gas and the spray water is very short, so the desulfurization and dust removal effect is not ideal, especially for high concentration and large flue gas volume. The exhaust gas control effect is even less ideal.

In order to meet the "ultra-low emission" standard, the previous desulfurization tower was modified and a layer of multi-tube Venturi device was added.

Venturi scrubber is a high-efficiency wet scrubber, which is often used for cooling, dust removal and desulfurization of high-temperature flue gas. The flue gas flows through the throat of the Venturi tube at high speed (that is, the part with the smallest diameter in the middle) and mixes with the radial inflow, the solid particles in the gas are moistened, the harmful gas is absorbed, and then enters the mist eliminator to remove fog and dust.

The dust removal and desulfurization process carried out in the Venturi scrubber can be divided into four steps: atomization, absorption, condensation and demisting. The first three are carried out in the Venturi tube, and the demisting is carried out in the latter process. The relative flow velocity between the gas-liquid two phases in the shrink tube and the throat is very high, and the droplets sprayed from the nozzle are further atomized into finer droplets under the impact of the high-speed airflow. At the same time, the gas is completely saturated by the solution, and the gas film attached to the surface of the dust particles is broken, so that the dust particles are wetted by water. At the same time, the SO2 gas film in the flue gas has a greater chance of contacting the absorbent liquid film, and the mass transfer coefficient becomes larger. The desulfurization effect is improved. In the diffusion tube, the reduction of the air velocity and the rise of the pressure make the condensation with dust particles as condensation nuclei take place faster. Dusty droplets that condense into larger particle sizes are easily captured by the rear demisting device.

Utility model content

The purpose of this utility model is to provide a multi-pipe Venturi device to improve the desulfurization and dust removal effect of the whole system in order to overcome the deficiencies in the prior art.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A multi-tube Venturi device, comprising a multi-tube Venturi upper flower plate, a multi-tube Venturi support flower plate, and several Venturi tubes fixed between the multi-tube Venturi upper flower plate and the multi-tube Venturi support flower plate , the Venturi tube is arranged perpendicular to the horizontal plane, and the Venturi tube includes a shrinkage tube, a throat tube, and a diffuser tube from bottom to top, and the shrinkage tube is fixed on the upper surface of the multi-tube Venturi support flower plate, and the The diffusion pipe is fixed on the lower surface of the multi-pipe Venturi upper flower plate, and the throats of several Venturi pipes are provided with slurry nozzles.

Preferably, several Venturi tubes are distributed in multiple layers at intervals.

Preferably, the cross-sections of the diffusion tube and the contraction tube of the Venturi tube are circular or regular hexagonal.

Compared with the prior art, the beneficial effect of the utility model is that multiple Venturi tubes are arranged side by side in multiple layers, and the sulfur removal efficiency is greatly improved. The radial slurry sprayed from the spray holes of the shower pipe network is mixed, and the droplets sprayed from the spray holes are further atomized into finer droplets under the impact of high-speed airflow. At the same time, the gas is completely saturated by the solution. The gas film attached to the surface of the dust particles is broken, so that the dust particles are wetted by water. At the same time, the chance of contact between the SO2 gas film in the flue gas and the absorbent liquid film increases, and the mass transfer coefficient becomes larger and the desulfurization effect is improved. In the diffusion tube, the reduction of the air velocity and the increase of the pressure make the condensation with dust particles as the condensation nuclei occur faster, and condense into dusty droplets with larger particle sizes, and the air flow continues upward into the machine. Centrifugal mist removal device for mist removal and dust removal.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the utility model.

Fig. 2 is a three-dimensional schematic diagram of Embodiment 2 of the present invention.

In the attached drawings: 1. Multi-tube Venturi supporting flower plate; 2. Multi-tube Venturi upper flower plate; 3. Venturi tube; 4. Diffusion tube; 5. Throat tube; 6. Shrink tube.

detailed description

In order to have a further understanding and understanding of the structural features and the achieved effects of the present utility model, a detailed description is provided in conjunction with preferred embodiments and accompanying drawings, as follows:

Example 1:

A multi-tube Venturi device, comprising a multi-tube Venturi upper flower board 2, a multi-tube Venturi supporting flower board 1 and a multi-tube Venturi upper flower board 2 and a multi-tube Venturi supporting flower board 1 A plurality of Venturi tubes 3, the plurality of Venturi tubes 3 are distributed in multiple layers at intervals, and the sulfur removal efficiency is greatly improved.

The Venturi tube 3 is arranged perpendicular to the horizontal plane, and the Venturi tube 3 sequentially includes a shrinkage tube 6, a throat tube 5 and a diffuser tube 4 from bottom to top, and the shrinkage tube 6 is fixed on the multi-tube Venturi supporting flower plate 1 on the upper surface, the diffuser tube 4 is fixed on the lower surface of the multi-tube Venturi upper flower plate 2, and the throats 5 of the several Venturi tubes 3 are provided with a number of slurry nozzles.

Example 2:

A multi-tube Venturi device, comprising a multi-tube Venturi upper flower board 2, a multi-tube Venturi supporting flower board 1 and a multi-tube Venturi upper flower board 2 and a multi-tube Venturi supporting flower board 1 A plurality of Venturi tubes 3, the plurality of Venturi tubes 3 are distributed in multiple layers at intervals, and the sulfur removal efficiency is greatly improved.

The Venturi tube 3 is arranged perpendicular to the horizontal plane, and the Venturi tube 3 sequentially includes a shrinkage tube 6, a throat tube 5 and a diffuser tube 4 from bottom to top, and the shrinkage tube 6 is fixed on the multi-tube Venturi supporting flower plate 1 on the upper surface, the diffuser tube 4 is fixed on the lower surface of the multi-tube Venturi upper flower plate 2, and the throats 5 of the several Venturi tubes 3 are provided with a number of slurry nozzles.

The diffuser tube 4 and shrink tube 6 of the Venturi tube 3 have regular hexagonal cross-sections. Compared with circular shapes, regular hexagonal structures can make better use of space, and are more suitable for towers with small cross-sectional areas.

When working, the flue gas flows through the throat of Venturi tube 3 at high speed and mixes with the radial slurry sprayed from the spray holes of the multi-pipe Venturi spray pipe network. The droplets sprayed from the spray holes are impacted by the high-speed airflow , further atomized into finer mist droplets, at the same time, the gas is completely saturated by the solution, the gas film attached to the surface of the dust particles is broken, and the dust particles are wetted by water. At the same time, the SO2 gas film in the flue gas and the absorbent liquid The chance of membrane contact is increased, and the mass transfer coefficient becomes larger, and the desulfurization effect is improved. In the diffuser pipe 4, the reduction of the airflow velocity and the rise of the pressure make the agglomeration with dust particles as condensation nuclei occur faster, and condense into dusty droplets with larger particle sizes, and the airflow continues to enter upward. Mechanical centrifugal demister device for demist and dust removal.

The lower surface of the multi-pipe Venturi supporting flower plate 1 is provided with three longitudinal beams and two cross beams. The support beam is connected with the tower body by welding, and the multi-tube Venturi device is fixed on the support beam through the multi-tube Venturi support flower plate 1 . Three longitudinal beams and two cross beams divide the tray into 12 small areas, and the multi-tube Venturi device can be made into 12 modules corresponding to the divided areas of the tray for easy installation. The multi-pipe Venturi ceiling plate 2 is also connected to the supporting beam by welding. A mechanical centrifugal demisting device is installed above the multi-pipe Venturi upper flower plate 2, and the desulfurized flue gas can be dedusted and demisted immediately.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. A multi-tube Venturi device, characterized in that it includes a multi-tube Venturi upper flower plate (2), a multi-tube Venturi support flower plate (1) and a multi-tube Venturi upper flower plate (2) A number of Venturi tubes (3) between the multi-tube Venturi support flower plate (1), the Venturi tubes (3) are arranged perpendicular to the horizontal plane, and the Venturi tubes (3) include shrinkage from bottom to top pipe (6), throat pipe (5) and diffusion pipe (4), the shrinkage pipe (6) is fixed on the upper surface of the multi-pipe Venturi support flower plate (1), and the diffusion pipe (4) is fixed on On the lower surface of the multi-pipe Venturi upper flower plate (2), the throats (5) of several Venturi tubes (3) are provided with slurry nozzles. 2. The multi-tube venturi device according to claim 1, characterized in that: several of the venturi tubes (3) are distributed in multiple layers at intervals. 3. The multi-tube venturi device according to claim 1, characterized in that: the cross-sections of the diffuser tube (4) and the contraction tube (6) of the venturi tube (3) are circular or regular hexagonal.