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Device and method for burning residual organic fluorine liquid by using plasmas

A plasma and organic fluorine technology, applied in combustion methods, incinerators, combustion types, etc., can solve problems such as unstable operation of devices, equipment damage, explosions, etc., and achieve good economic benefits.

Active Publication Date: 2014-12-03
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the tail gas after plasma incineration of highly toxic organic fluorine residue at high temperature, a large amount of carbon black will be produced, which will block the filler, pipe fittings, transmission equipment, and adhere to the impeller of the fan, resulting in very unstable operation of the device. In the case of excessive pressure, the device will "suppress", causing equipment damage or even explosion accidents

Method used

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  • Device and method for burning residual organic fluorine liquid by using plasmas
  • Device and method for burning residual organic fluorine liquid by using plasmas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Venturi mixer and incinerator

[0028] see figure 2 , Install two Venturi mixers made of 316L steel at the raw material inlet of the incinerator, and install them symmetrically with the plasma spray gun as the symmetrical axis. The Venturi mixer is parallel to the horizontal plane, and the angle between the central axis of the Venturi mixer and the centerline of the incinerator is 45°. The length-to-diameter ratio of the Venturi mixer is 6:1, and the throat diameter is 1 / 3 of the pipe diameter. The liquid entering the Venturi mixer enters from the tangential direction, the air enters from the axial direction, the pressure of the air entering is 0.5MPa, and the volume ratio of the entering of air and organic fluorine raffinate is 1kg / h: 2.6NM 3 / h (standard cubic meter), the organic fluorine residue and air are mixed evenly in the Venturi mixer.

[0029] see figure 1 . The incinerator includes the feeding device, the plasma spray gun, the plasma arc area...

Embodiment 2

[0030] Embodiment 2: Incineration of organic fluorine raffinate

[0031] 1) Organic fluorine high fluorine residual liquid and air according to the ratio of 1kg / h: 2.5NM 3 / h, stay in the Venturi mixer for 1-3 seconds, be blown into the mixer by air, and the gas-liquid mixture can enter the high-temperature plasma area of ​​the incinerator after mixing evenly. Here the air has a pressure of 0.5MPa, which is enough to suck the raffinate into the mixer.

[0032] 2) The uniformly mixed gas-liquid mixture is transported to the high-temperature plasma combustion zone through the plasma gun to make it fully combustible. The temperature of the incineration furnace is 800 ° C, and at the same time, the generation of carbon black, etc., is avoided in the intermediate cracking product. In order to burn more fully, The furnace cavity of the incinerator maintains a slight negative pressure state, and the pressure is controlled at -300pa.

[0033] 3) The gas after combustion is sprayed a...

Embodiment 3

[0035] Embodiment 3: Incineration of organic fluorine raffinate

[0036] 1) Organic fluorine high boiling raffinate and air according to the ratio of 1kg / h: 2.6NM 3 / h, stay in the Venturi mixer for 2 seconds, and be blown into the mixer by air, and the gas-liquid mixture can enter the plasma high temperature zone of the incinerator after mixing evenly. Here the air has a pressure of 0.5MPa, which is enough to suck the raffinate into the mixer.

[0037] 2) The uniformly mixed gas-liquid mixture is transported to the high-temperature plasma combustion zone through the plasma gun to make it fully combustible, and the temperature of the incineration furnace is 800°C. At the same time, the formation of intermediate cracking products such as carbon black is avoided. Here, in order to burn more fully, the furnace cavity of the incinerator maintains a slight negative pressure state, and the pressure is controlled at -500Pa.

[0038] 3) Absorb the HF gas in the combusted inorganic g...

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Abstract

The invention provides an incinerator for burning residual organic fluorine liquid, which comprises a feeding device, a plasma torch, a plasma arc area, an incinerator wall, a slag outlet and an air outlet, wherein the feeding device is composed of two Venturi mixers, the two Venturi mixers are arranged symmetrical about the centerline of the incinerator and parallel to the horizontal plane, and a 45-degree angle is formed between each Venturi mixer and the centerline of the incinerator. The plasma torch and extension lines of the Venturi mixers of the feeding device are intersected in one point, and the point is located in the center of the plasma arc area. The invention also provides a method for burning residual organic fluorine liquid by using the incinerator. According to the invention, the Venturi mixers are arranged at a residual organic fluorine liquid inlet of the incinerator, so that residual organic fluorine liquid can be fully mixed with air and burned, thereby preventing the generation of a lot of carbon blacks, and ensuring that the device can be running stably for a long time.

Description

technical field [0001] The invention belongs to the field of fluid combustion methods and equipment, in particular to a device and method for plasma incineration of organic fluorine raffinate. Background technique [0002] Organic halides are one of the wastes generated by the fluorine chemical industry. The method of incineration is a conventional method for dealing with organic fluorine residues. Among them, plasma incineration has its own problems because the temperature of incineration is different from conventional combustion methods. During incineration, the compressed air and the organic fluorine residue are transported to the plasma arc area of ​​the incinerator through different feed pipes. Under the action of high-temperature plasma (heat source), the organic fluorine residue reacts with the compressed air to form a large amount of Carbon black, hydrogen fluoride and other inorganic substances. [0003] Since the organic fluorine residual liquid and compressed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/04
Inventor 张峰李嘉曾本忠谭梅芳杨林茂冯启凤
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD