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A device and method for preparing titanium tetrachloride by vibrating internal circulation fluidization

A technology of titanium tetrachloride and internal circulation, applied in the direction of titanium halide, etc., can solve the problems of complex reactor structure, low energy efficiency, and large equipment investment

Inactive Publication Date: 2017-01-04
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent mainly has the following disadvantages: 1) The reactor structure is complex, the number of reactors required is large, and the structure difference between the two types of reactors is large, the equipment investment is large, and the production cost is high
2) In order to avoid coke particles with low density being carried out of the reactor by the gas, coke particles with a large particle diameter must be used, or a small operating gas velocity should be used, both of which will reduce the reaction rate and affect the reactor. efficiency, low productivity
The main disadvantages of this method are: 1) the circulating fluidized bed device is relatively complicated, and the fluidized bed reactor included includes a heating section, a high temperature reaction section and a cooling and separating section at the top, with complex structure, inconvenient operation and large equipment investment ; 2) In order to promote the fragmentation of agglomerates, a higher gas velocity is required, and a high reactor is needed to improve the conversion rate of one pass; 3) Because the reactor has heating and cooling at different heights, the energy efficiency is low

Method used

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  • A device and method for preparing titanium tetrachloride by vibrating internal circulation fluidization

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Embodiment 1

[0033] Such as figure 1 , 2Shown, a vibratory internal circulation fluidization device for preparing titanium tetrachloride. It mainly includes external circulating fluidized bed, internal fluidized bed reactor, vibration distribution plate and vibrator, cyclone separator, gas buffer tank and gas distribution plate, etc. Its characteristics are:

[0034] The materials of the external circulating fluidized bed, the internal fluidized bed reactor, the vibration distribution plate, the gas buffer tank, the baffle plate, the discharge pipe, the straight pipe and the feed pipe are all stainless steel.

[0035] The shape of the external circulating fluidized bed 1 is a cylindrical shell with a closed top, and the inner diameter of the cylindrical shell is 1800mm, the length is 3000mm, and the thickness is 5mm. The upper part of the cylindrical shell with a height of 1700mm is a free airspace, which is used for feeding coke solid raw materials and settling solid particles flowing ...

Embodiment 2

[0041] A kind of vibrating type internal circulation fluidization prepares the device of titanium tetrachloride, with embodiment 1, wherein:

[0042] The inner diameter of the external circulating fluidized bed 1 is 500mm, the length is 1000mm, and the thickness is 3mm. The height of the upper part of the free space in the cylindrical shell is 400mm. Two through holes ( That is, the aperture of the coke solid raw material inlet) is 50 mm. Weld a coke particle feeder with a length of 500mm, an angle of 30° with the shell of the external circulating fluidized bed 1, and an inner diameter matching the inlet of the coke solid raw material outside the inlet of the coke solid raw material. Tube 1-2. The aperture of the through hole (i.e. the discharge port) at the center of the top surface of the cylindrical housing is 50mm, and a length of 1500mm is welded at the discharge port, and the inner diameter is the same as that of the discharge port. Matching discharge pipe 4, and weldi...

Embodiment 3

[0047] A kind of vibrating type internal circulation fluidization prepares the device of titanium tetrachloride, with embodiment 1, wherein:

[0048] The materials of the external circulating fluidized bed, the internal fluidized bed reactor, the vibration distribution plate, the gas buffer tank, the baffle, the discharge pipe, the straight pipe and the feed pipe are all made of titanium alloy.

[0049] The inner diameter of the external circulating fluidized bed 1 is 3000mm, the length is 5000mm, and the thickness is 8mm. The height of the upper free space in the cylindrical shell is 3000mm. The aperture of the solid raw material inlet) is 150mm, and a length of 1500mm is respectively welded outside the coke solid raw material inlet, and a coke particle feed pipe 1 having an angle of 70° with the shell of the outer circulating fluidized bed 1 -2. At the center of circle of the top end face of the cylindrical housing, a through hole (i.e. a discharge port) with a diameter of ...

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Abstract

The invention relates to a device and a method for preparing titanium tetrachloride in a manner of vibrating-type inner circulation fluidization, and belongs to the technical field of preparation of the titanium tetrachloride. The device mainly comprises an outer circulating fluidized bed, an inner circulating fluidized bed, a vibration distribution plate, a vibrator, a cyclone separator, a gas buffer tank, a gas distribution plate and the like. The method comprises the following steps: carrying out a chlorination reaction, cooling and gas-solid separation in the device by taking low-grade high titanium slags with a high calcium and magnesium content and coke as solid raw materials as well as taking chlorine gas, oxygen and nitrogen as gas raw materials, thereby preparing the titanium tetrachloride. The device has the characteristics of being compact in structure, easy to operate and overhaul, good in granule anti-bonding effect, high in titanium tetrachloride quality, favorable for continuous, stable and long-term operations, suitable for large-scale industrial production and the like. The method has the characteristics of being high in material heat utilization rate, uniform in reaction temperature distribution, convenient to control, high in titanium conversion rate and the like. Thus, the method and the device which are provided by the invention are particularly suitable for preparing the titanium tetrachloride from the low-grade high titanium slags with the high calcium and magnesium content.

Description

technical field [0001] The invention belongs to the technical field of preparing titanium tetrachloride, and in particular relates to a device and a method for preparing titanium tetrachloride. Background technique [0002] Titanium tetrachloride is an important intermediate for the manufacture of titanium dioxide (titanium dioxide) and titanium metal. Titanium dioxide is considered to be a white pigment with the best performance in the world, and it is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. China is currently the second largest consumer of titanium dioxide after the United States, and the growth momentum is rapid and the potential is also very large. At present, the use of titanium is also developing rapidly, and it has been widely used in aircraft, rockets, artificial satellites, spacecraft, ships, light industry, chemical industry, textile, medical and petrochemical industries. China is a cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/02
Inventor 陈恒志袁理想王建伟程杰杨东明张晓刚
Owner CHONGQING UNIV
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