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Venturi pipe and applications thereof

A technology for a venturi tube and a throat tube, which is applied to the venturi tube and its application fields, can solve the problems of blockage of liquid nozzle holes, affecting the washing effect, and easy scaling of the shrinking tube, so as to achieve small impact on the structure and enhance the atomization effect. , the effect of taking up less space

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-speed water flow in this Venturi scrubber has a greater impact on the variable-diameter tube of the Venturi structure, and the shrinkage tube is prone to fouling, which leads to blockage of the liquid spray hole and affects the washing effect.

Method used

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  • Venturi pipe and applications thereof
  • Venturi pipe and applications thereof
  • Venturi pipe and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] the present invention figure 1 The structural Venturi tube is used for flue gas dust removal, and the flue gas volume is 80Nm 3 / h, the dust content is 300g / m 3 . The diameter of the throat in the Venturi tube is 30 mm, the length of the throat is 60 mm, the cone angles of the contraction section and the diffusion section are both 20°, the lengths of the contraction section and the diffusion section are both 60 mm, and the lengths of the inlet and outlet straight sections are 20mm. A group of nozzles are arranged in the venturi tube along the axial direction, the vertical distance between the two nozzles is 40mm, the opening diameter of each nozzle is 15mm, the ratio of the total opening area of ​​each nozzle to the throat cross-sectional area is 0.25, the opening The hole angle is 90°. The ratio of liquid flow to flue gas flow is 0.2~5 (L / Nm 3 ), after being washed by the Venturi tube of the present invention and treated by the subsequent screen demister, the dust...

Embodiment 2

[0043] the present invention figure 2 The Venturi tube is used in flue gas desulfurization, and the flue gas volume is 80000Nm 3 / h, SO in flue gas 2 The concentration is 980mg / m 3 . The diameter of the throat in the Venturi tube is 1000mm, the length of the throat is 1500mm, the cone angles of the constriction section and the divergence section are both 10°, and the lengths of the constriction section and the divergence section are both 2000mm. A group of nozzles is installed in the venturi tube along the axial direction, the vertical distance between the two nozzles is 2000mm, the hole diameter on the nozzle is 30mm, the ratio of the total opening area of ​​each group of nozzles to the throat cross-sectional area is 0.3, and the opening angle is 80 °~100°. The ratio of liquid flow to flue gas flow is 0.2~5 (L / Nm 3 ), after being washed by the Venturi tube of the present invention and treated by the subsequent demister, the SO in the flue gas 2 The concentration is 10m...

Embodiment 3

[0047] the present invention figure 1 The venturi tube is used in the production of alkylated gasoline, where the gas is 80Nm 3 / hC 4 A mixture of alkanes and olefins, the liquid is 98% concentrated sulfuric acid, concentrated sulfuric acid is used as a catalyst, and at a reaction temperature of 10°C, C 4 Alkenes and alkenes are produced through the alkylation reaction to produce high-octane gasoline components. The diameter of the throat in the Venturi tube is 30 mm, the length of the throat is 60 mm, the cone angles of the contraction section and the diffusion section are both 20°, the lengths of the contraction section and the diffusion section are both 60 mm, and the lengths of the inlet and outlet straight sections are 20mm. A group of nozzles is arranged in the venturi tube along the axial direction, the vertical distance between the two nozzles is 30mm, the hole diameter on each nozzle is 15mm, the ratio of the total opening area on each nozzle to the throat cross-se...

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Abstract

The invention discloses a venturi pipe and applications thereof. The venturi pipe comprises a contraction section, a throat pipe, a diffusion section and plural groups of liquid-phase spraying nozzlesarranged in parallel to the axial direction, wherein each group comprises two liquid-phase spraying nozzles with opposite spraying nozzle directions, the two liquid-phase spraying nozzles are respectively arranged at the tail end of the contraction section and the starting end of the diffusion section, the starting end of the contraction section is a gas-phase inlet, the tail end of the diffusionsection is a gas-liquid outlet, the liquid-phase inlet is arranged on the pipe wall of the contraction section and / or the diffusion section, and the liquid-phase inlet is communicated with the liquid-phase spraying nozzle through a pipeline. The venturi pipe provided by the invention is simple in structure and good in gas-liquid mixing effect, has good application prospect in a gas-liquid mass transfer process, and is particularly suitable for the fields of gas dust removal such as flue gas desulfurization, flue gas dust removal, cooling and the like.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a Venturi tube and its application. Background technique [0002] Venturi scrubber, also known as Venturi tube dust collector, is composed of a Venturi tube and a demister. The dust removal process can be divided into three stages: atomization, condensation and demisting. The first two stages are carried out in the Venturi tube, and the latter stage is completed in the demister. A Venturi tube consists of a constriction, a throat, and a divergence. After the dust-laden gas enters the contraction section, the flow velocity gradually increases with the decrease of the diameter of the pipe, and reaches the maximum value when it enters the throat. The washing liquid is generally added from the constriction section or throat, the relative flow velocity between the gas and liquid phases is very high, the liquid droplets are atomized under the action of the high-speed ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/10B01F3/04B01F5/04
CPCB01D47/10B01F23/23B01F25/31252B01F25/312
Inventor 李欣方向晨王晶刘忠生王海波金平
Owner CHINA PETROLEUM & CHEM CORP
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