Titanium plant tail gas treatment method as well as barium chloride produced by using titanium plant tail gas treatment method and production method of barium chloride

A barium chloride and tail gas technology, applied in separation methods, chemical instruments and methods, calcium/strontium/barium chloride, etc., can solve the problems of large energy consumption of evaporation, and achieve the purpose of reducing energy consumption, reducing evaporation, and increasing driving force Effect

Inactive Publication Date: 2014-03-12
GUIZHOU REDSTAR DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, it is produced by hydrochloric acid and barium carbonate process, but the evaporation energy consumption in this method is relatively large
At present, there is no relevant report on the use of tail gas from titanium plants for the production of barium chloride products

Method used

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  • Titanium plant tail gas treatment method as well as barium chloride produced by using titanium plant tail gas treatment method and production method of barium chloride
  • Titanium plant tail gas treatment method as well as barium chloride produced by using titanium plant tail gas treatment method and production method of barium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] refer to figure 2 Shown, utilize the method for preparing barium chloride from titanium factory tail gas, comprise the steps:

[0070] (1) to 1 # ,2 # 、3 # Add the industrial barium carbonate of 150kg respectively in the circulation slurry tank, add water after adding and be mixed with the barium carbonate / water slurry that mass content is 20%; To 4 # Add 150kg of industrial-grade barium hydroxide octahydrate to the circulating slurry tank, and then add water to prepare a 0.5mol / L barium hydroxide solution; according to 12L / m 3 The liquid-gas ratio is used to set the circulating liquid spray volume of all circulating pumps, turn on the circulating pump, and let the tail gas into the absorption reaction, and the flow rate of the tail gas is 7000m 3 / h.

[0071] (2) With the continuous progress of tail gas absorption reaction, 1 # The acidity in the circulating slurry tank increases, when 1 # In the circulating slurry tank [H + ]=2.0mol / L, move all the mixed slur...

Embodiment 2

[0075] (1) to 1 # ,2 # 、3 # Add the industrial barium carbonate of 200kg respectively in the circulation slurry tank, add water after adding and be mixed with the barium carbonate / water slurry that mass content is 25%; To 4 # Add 200kg of industrial-grade barium hydroxide octahydrate to the circulating slurry tank, and then add water to prepare a 1.0mol / L barium hydroxide solution; according to 8L / m 3 The ratio of liquid to gas is used to set the spray volume of the circulating liquid of the circulating pump, turn on the circulating pump, and feed the exhaust gas to carry out the absorption reaction. The flow rate of the exhaust gas is 8000m 3 / h.

[0076] (2) With the continuous progress of tail gas absorption reaction, 1 # The acidity in the circulating slurry tank increases, when 1 # In the circulating slurry tank [H + ]=2.4mol / L, all the mixed slurry in the circulating slurry tank is moved to a conventional filter device for filtration and separation to obtain solid ...

Embodiment 3

[0080] (1) to 1 # ,2 # 、3 # Add the industrial barium carbonate of 200kg respectively in the circulation slurry tank, add water after adding and be mixed with the barium carbonate / water slurry that mass content is 23%; To 4 # Add 200kg of industrial-grade barium hydroxide octahydrate to the circulating slurry tank, and then add water to prepare a 0.8mol / L barium hydroxide solution; according to 10L / m 3 The ratio of liquid to gas is used to set the spray volume of the circulating liquid of the circulating pump, turn on the circulating pump, and feed the exhaust gas to carry out the absorption reaction. The flow rate of the exhaust gas is 9000m 3 / h.

[0081] (2) With the continuous progress of tail gas absorption reaction, 1 # The acidity in the circulating slurry tank increases, when 1 # In the circulating slurry tank [H + ]=3.11mol / L, all the mixed slurry in the circulating slurry tank is moved to a conventional solid-liquid separation device (such as a filter device) t...

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Abstract

The invention relates to a method for producing barium chloride from titanium plant tail gas. According to the method, barium carbonate slurry is added into a front three-stage circulation slurry pool; barium hydroxide solution is added into a four-stage circulation slurry pool, then, the titanium plant tail gas is introduced for circulation absorption reaction; when the [H+] concentration in slurry of a primary circulation slurry pool reaches a value higher than 2.0 mol / L, the slurry in the primary circulation slurry pool is completely removed; after all the slurry in the primary circulation slurry pool is removed, partial slurry in a two-stage circulation slurry pool is added into the primary circulation slurry pool, partial slurry in the three-stage circulation slurry pool is added into the two-stage circulation slurry pool, meanwhile, the barium carbonate slurry is added into the three-stage circulation slurry pool for circulation absorption reaction; and when the [OH-] concentration in the four-stage circulation slurry pool is lower than 0.5 mol / L, barium hydroxide is added, the removed slurry is subjected to solid and liquid separation to obtain solid phase products, and the steps can be carried out in a way out of order. The invention also relates to the barium chloride prepared by the method for producing the barium chloride. The invention also relates to a method for treating the titanium plant tail gas.

Description

technical field [0001] The invention relates to the field of comprehensive treatment of pollutants, in particular to a method for treating tail gas in a chlorination process of a titanium plant, a barium chloride product prepared by using the method, and a preparation method. Background technique [0002] At present, the tail gas of the chlorination section of the titanium plant is mainly treated by multi-stage water spray absorption to prepare by-product hydrochloric acid. Due to the regional restrictions on the sales of by-product hydrochloric acid and the seasonally unstable demand of downstream users, the device cannot continue to operate stably. [0003] Barium chloride is a traditional bulk commodity with a wide range of uses. It can be used to refine electrolyte caustic soda brine and purifier for boiler water. It can also be used as a mordant for printing and dyeing. It can also be used to prepare pigments to prevent fading of ceramic products. At present, there are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/68C01F11/28
Inventor 姜志光华东刘湘玉曹玉欣
Owner GUIZHOU REDSTAR DEVING
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