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Sodium bicarbonate crystal preparation equipment and process for preparing sodium bicarbonate crystals by utilizing same

A technology of sodium bicarbonate and process method, which is applied in the field of sodium bicarbonate crystallization preparation equipment and the process field of using the equipment to prepare sodium bicarbonate crystallization, which can solve the problem of small sodium bicarbonate crystal particles and easy scarring and scaling of coolers , long and complicated process, etc., to achieve the effect of not easy to scar, simple structure, and easy operation of the process

Active Publication Date: 2013-09-18
SHIJIAZHUANG TIANREN CHEM EQUIP GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a kind of sodium bicarbonate crystallization preparation equipment, to solve the problem that the existing water-cooled carbonization tower cooler is easy to scab and grow fouling, or the equipment is complex, Problems of large investment and high energy consumption
[0004] Two of the object of the present invention is exactly to provide a kind of processing method that utilizes above-mentioned preparation equipment to produce sodium bicarbonate crystallization, to solve the problem that the sodium bicarbonate crystallization particle that existing water-cooled processing method produces is fine, or because not cold Long and complicated process caused by carbonization process

Method used

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  • Sodium bicarbonate crystal preparation equipment and process for preparing sodium bicarbonate crystals by utilizing same

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Embodiment 1

[0027] Such as figure 1 As shown, the total height of the carbonization tower used in the present invention is 27.87m, and the top of the tower is the tail gas absorption section 10 (5.77m high, 2.6m inner diameter), and the first reaction zone, the second reaction zone and the second reaction zone are successively below the tail gas absorption section 10. Three reaction zones (the total height of the three reaction zones is 22.1m, and the inner diameter is 4.6m).

[0028] The upper side wall of the tail gas absorption section 10 is provided with a liquid filling port 8 , and its top is provided with a carbon dioxide exhaust port 9 , and the tail gas absorption section 10 is connected with the first reaction zone by a downcomer 7 .

[0029] A magma separator 6 is installed on the tower body inner wall between the first reaction zone and the second reaction zone, and a liquid outlet 11 is provided on the tower body sidewall corresponding to the magma separator 6; A liquid retu...

Embodiment 2

[0032] Sodium bicarbonate crystallization preparation technological process is:

[0033] a) At the bottom of the carbonization tower, carbon dioxide (CO 2 , the concentration is 90~98%), which is evenly distributed into the tower through the carbon dioxide distributor 3; at the top of the carbonization tower, ammonia brine is supplied from the filling port 8 (temperature 25-30°C);

[0034] Ammonia brine is mixed with CO in tail gas absorption section 10 2 contact, pre-carbonization occurs, and a pre-carbonized liquid is obtained.

[0035] b) The pre-carbonization liquid descends into the first reaction zone and ascends CO 2 Carbonization reaction occurs in contact, and primary carbonization liquid is obtained, and sodium bicarbonate crystals start to separate out. After the sodium bicarbonate crystals enter the crystal slurry separator 6 for separation with the primary carbonization liquid, the primary carbonization liquid is discharged from the liquid outlet 11 as the middl...

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Abstract

The invention discloses sodium bicarbonate crystal preparation equipment and a process for preparing sodium bicarbonate crystals by utilizing the same. The equipment comprises a carbonizer, wherein a tail gas absorption section is arranged at the top of the carbonizer; the part (below the tail gas absorption section) is divided into a first reaction zone, a second reaction zone and a third reaction zone in sequence; and a plurality of ring-shaped tower plates are arranged in each reaction zone. The process is characterized by comprising the following steps: firstly carrying out first-step carbonization and crystallization, then carrying out crystal-slurry separation on reaction solution and enabling the product to leave from the carbonizer and pass through an ammoniating apparatus for ammoniating so that sodium bicarbonate enters an unsaturated zone; then cooling with water and finally sending sodium bicarbonate back to the carbonizer for further carbonization and crystallization. Therefore, the problem of water cooler scabbing is solved, no standby coolers are needed for alternate operation, the prepared sodium bicarbonate crystals have good crystal form, big particles and low moisture content and the energy consumption of the subsequent calcining procedure is also obviously reduced.

Description

technical field [0001] The present invention relates to the preparation equipment of sodium bicarbonate crystallization and its technical method, specifically a kind of sodium bicarbonate crystallization production equipment and the technical method of using this equipment to prepare sodium bicarbonate crystallization. Background technique [0002] There are generally two kinds of processes for producing sodium bicarbonate crystals by the existing combined alkali method, one is a water cooling process, and the carbonization tower used is a Solvay carbonization tower. Sodium bicarbonate scale, the improved external cooling carbonization tower, its external cooler is also prone to scabbing and scaling, the sodium bicarbonate crystals produced in this way are small, and it is difficult to produce larger crystals. The other is the non-cooling carbonization process. This process not only produces better crystallization quality of sodium bicarbonate, but also solves the problem of...

Claims

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Application Information

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IPC IPC(8): C01D7/38
Inventor 张建伟牛新平吴利彦刘晓春史永良马文锁刘晓文成东江王荣魁王东康勤阁胡志肖
Owner SHIJIAZHUANG TIANREN CHEM EQUIP GRP
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