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Gas-phase naphthalene feeder of phthalic anhydride device

A technology of feeder and gas phase, which is applied in the direction of feeding device, chemical instrument and method, chemical/physical process, etc., can solve the problems that cannot meet the uniform mixing and concentration of air, so as to avoid coking and clogging, simple manufacturing process and saving The effect of fees

Pending Publication Date: 2019-08-30
邢台旭阳化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fatal flaw of the bent tube direct injection type is that the stream of gaseous naphthalene entering the Venturi mixer is too concentrated to meet the uniform mixing with the incoming air

Method used

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  • Gas-phase naphthalene feeder of phthalic anhydride device
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  • Gas-phase naphthalene feeder of phthalic anhydride device

Examples

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Embodiment Construction

[0021] Embodiments of the invention are described in detail below, but the invention can be practiced in many different ways as defined and covered by the claims.

[0022] Please refer to Figures 1 to 4 As shown, according to an embodiment of the present invention, the gas-phase naphthalene feeder of the phthalic anhydride plant comprises a feed pipe 1, an outer sleeve 2 and a Venturi mixer 3, and the outer sleeve 2 is fixedly connected on the outer wall of the Venturi mixer 3, and the feeding The tube 1 is sleeved in the outer tube 2, and one end protrudes from the outer tube 2 and enters the Venturi mixer 3. The feed tube 1 is sealed at one end of the Venturi mixer 3, and the feed tube 1 is located at the Venturi mixer. Part of the inner mixer 3 is provided with a long hole 4 , and the opening of the long hole 4 faces the low-pressure area of ​​the Venturi mixer 3 .

[0023] In this embodiment, since the end of the feed pipe 1 located in the Venturi mixer 3 is sealed, the ...

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Abstract

The invention provides a gas-phase naphthalene feeder of a phthalic anhydride device. The gas-phase naphthalene feeder of the phthalic anhydride device comprises a feeding pipe (1), an outer sleeve (2) and a Venturi mixer (3); the outer sleeve (2) is fixedly connected onto the outer wall of the Venturi mixer (3); the feeding pipe (1) is sleeved in the outer sleeve (2), and one end the feeding pipe(1) stretches out of the outer sleeve (2) and enters the Venturi mixer (3); the end portion of one end, located in the Venturi mixer (3), of the feeding pipe (1) is sealed; long-strip holes (4) are formed in a part, located in the Venturi mixer (3), of the feeding pipe (1); the openings of the long-strip holes (4) face towards the low-pressure area of the Venturi mixer (3). According to the gas-phase naphthalene feeder of the phthalic anhydride device, uniform mixing of gas-phase naphthalene and air can be ensured; the reaction efficiency can be improved while the stability and safety of an oxidation reaction are improved; the product quality is improved; the oxidation yield is improved.

Description

technical field [0001] The invention relates to the technical field of feeders, in particular to a gas-phase naphthalene feeder for phthalic anhydride. Background technique [0002] At present, in the production of phthalic anhydride, industrial naphthalene is pumped to the naphthalene heater for heating and vaporization. After vaporization, it is heated again by the jacketed tube of heat transfer oil and then enters the gas phase naphthalene feeder. The air is compressed by the air compressor and heated by the heater. Finally, it enters from the lower part of the Venturi mixer, and the air is fully mixed with the gas phase naphthalene of the gas phase naphthalene feeder in the Venturi mixer, and then enters the vaporizer and the reactor for reaction. [0003] The gas-phase naphthalene feeder of the phthalic anhydride plant is one of the key equipment in the production process of phthalic anhydride. In the prior art, elbow direct injection is adopted. The fatal flaw of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00
CPCB01J4/001B01J2204/002
Inventor 吴龙剑安明张仕函周文克赵广学
Owner 邢台旭阳化工有限公司
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