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Secondary absorption tower capable of realizing low-level heat recovery

A technology of heat recovery and second-absorption tower, which is applied in the field of second-absorption tower, can solve the problems of heat waste and unutilization

Inactive Publication Date: 2020-07-17
中化重庆涪陵化工有限公司
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  • Description
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  • Application Information

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Problems solved by technology

Due to the low acid temperature at the outlet of the existing second-absorption tower, it cannot be utilized by the acid-making process system. At present, all the heat of the outlet acid of the second-absorption tower is discharged into the air through the cooling tower, resulting in part of the heat in the second-absorption process. waste of

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  • Secondary absorption tower capable of realizing low-level heat recovery
  • Secondary absorption tower capable of realizing low-level heat recovery
  • Secondary absorption tower capable of realizing low-level heat recovery

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with embodiment, but does not limit the present invention thereby. The operation methods and devices involved in the following examples are conventional methods and devices unless otherwise specified.

[0026] The invention provides a second absorption tower capable of realizing low-level heat recovery. The second absorption tower is used for secondary absorption of sulfur trioxide in the sulfuric acid preparation process. The second absorption tower includes a tower body and an acid separation tower arranged on the upper part of the tower device, the packing arranged under the acid separator and the acid circulation tank arranged at the bottom of the tower body, the spray density of the acid separator of the second suction tower is set at 2.0-3.5m 3 / m 2 · h; the packing of the second suction tower is set as a ceramic packing with a diameter of 20-50 mm.

[0027] The spray density of 98% sulfuric ac...

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Abstract

The invention discloses a secondary absorption tower capable of realizing low-level heat recovery. The secondary absorption tower comprises a tower body, an acid distributor arranged at the upper partof the tower body, a filler arranged below the acid distributor and an acid circulating tank arranged at the bottom of the tower body; the spraying density of the acid distributor of the secondary absorption tower is set to be 2.0-3.5 m < 3 > / m < 2 >. h; and the secondary absorption tower packing is set to be ceramic packing with the diameter phi of 20-50mm. According to the secondary absorptiontower provided by the invention, low-level heat in the secondary absorption process can be recycled, the secondary absorption process system is simple and feasible to improve, the economic cost can besaved, and huge economic benefits are realized.

Description

technical field [0001] The invention relates to the technical field of low-level heat recovery in a sulfuric acid preparation process, in particular to a secondary absorption tower capable of realizing low-level heat recovery. Background technique [0002] Sulfuric acid is an important basic chemical raw material and the most important product in the chemical industry with a wide range of uses. At present, the methods commonly used in the industry to produce sulfuric acid include pyrite acid production method, sulfur acid production method and smelting flue gas acid production method. The commonly used industrial acid production process usually adopts the "two conversion and two suction" production process, that is, the SO produced by pyrite calcination and sulfur incineration 2 or SO from smelting flue gas 2 Converted to SO for the first time by the converter 3 , SO generated by one conversion 3 Then it is absorbed through a suction tower, and the incompletely converted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/80
CPCC01B17/806
Inventor 陈廷明冯永刚罗于庆
Owner 中化重庆涪陵化工有限公司
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