Large-scale pressure carbonization tower

Abstract

The invention relates to a large-scale pressure carbonization tower which is characterized in that its bamboo rain-hat is composed of a base plate, a top cover and several rib plates; the rib plate is central symmetric and fixed on the base plate; the top cover is fixed on the rib plates; a through hole is arranged at the center of the base plate; the edge of the base plate equipped with the through hole is a zigzag edge; 24 bamboo rain-hats are arranged inside the upper portion of the tower; the opening rate of the first bamboo rain-hat to the 21st bamboo rain-hat from the top to the bottom is 9.8%, and the opening rate of the 22nd bamboo rain-hat to the 24th bamboo rain-hat is 12.8%; one bamboo rain-hat with the opening rate being 13.3% is arranged inside a central conical tower; an airintake is arranged on the central conical tower body; the base plates of the bamboo rain-hats at the bottom are all equipped with appropriate opening rate; and the second and seventh tower sections are respectively provided with two air intakes. According to the invention, ventilation volume and liquid holdup of each portion of the carbonization tower are enlarged; the reaction time and crystal growth time are prolonged; carbonization tower production power and carbonization conversion rate are raised; sodium bicarbonate crystalline particles become large and many unfavorable factors of original carbonization towers are improved.

Description

technical field [0001] The invention relates to a pressurized carbonization reaction equipment for changing gas to produce alkali, in particular to a large pressurized carbonization tower. Background technique [0002] At present, there are roughly three methods for producing soda ash in China, which are ammonia-soda method, combined soda method and trona method. Among them, the key equipment for producing soda ash by combined soda method is the carbonization tower, and the shift gas soda production process mainly includes the following aspects. Firstly, the shift gas in the synthesis shift section enters from the bottom of the pressurized carbonization tower, and contacts and reacts with the neutralized ammonia mother liquor from the top of the carbonization tower. Through this process, the energy, momentum and mass of the substance are fully transferred, and the carbonic acid produced after the reaction Sodium hydrogen high-temperature solution, this high-temperature solut...

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Problems solved by technology

[0006] 3. The reaction of the pressurized carbonization tower is poor, and the medium temperature is generally 60°C, which cannot be further increased

[0008] 5. Take out the solid-liquid ratio is only 25%, take out CNH 3 Not high, only about 85tt, conversion rate is only 65%

[0009] 6. The amount of synthetic conversion gas for single-tower processing is less, the highest is only 6000m 3 / h, the CO2 content of the synthesis tail gas is 0.2%, and sometimes it can reach as high as 0.25%, which affects the purification effect of the synthesis and refining gas

[0010] In view of the above problems, especially the low production capacity of a single tower, it has restricted the further development of the enterprise and affected the further reduction of product costs

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