Reaction tank for preparing phosphoric acid by using hydrochloric acid method
A technology of reaction tank and hydrochloric acid, applied in the field of reaction tank, can solve the problems of waste of resources, increase of production cost, serious problems, etc., and achieve the effect of guaranteed residence time, convenient control and precise control
Inactive Publication Date: 2018-12-14
HUBEI SANNING CHEM
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Problems solved by technology
With the continuous development of phosphate rock resources, the production capacity of wet-process phosphoric acid continues to expand, and the output of phosphorus tailings also continues to accumulate, which not only causes a lot of waste of resources, but also brings serious environmental problems and increases production costs.
Method used
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Embodiment Construction
[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0024] The positional relationship of each part is as figure 1 , 2 As shown, a multi-stage reaction tank device for decomposing phosphorous tailings with hydrochloric acid includes a reaction tank 1 (preferably, in view of the characteristics of high chloride ion content in the material, the reaction tank 1 is made of carbon brick lining rubber in the inner layer and stainless steel in the outer layer) , the reaction tank 1 is provided with an underflow plate and an overflow weir 8 in turn, such as image 3 Among them, the lower end of the underflow plate is provided with an underflow port 4, and the underflow plate and the overflow weir 8 divide the interior of the reaction tank 1 into five sub-reaction areas, which are marked as the first and second in turn from the front end of the reaction tank 1. , the third, fourth, and fifth sub-reaction zones, ...
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The invention discloses a reaction tank for preparing phosphoric acid by using a hydrochloric acid method. A multi-stage reaction tank for decomposing phosphate tailings with hydrochloric acid comprises a reaction tank, wherein a bottom flow plate and an overflow weir are sequentially arranged inside the reaction tank; a bottom flow hole is formed in the lower end of the bottom flow plate; the interior of reaction tank is divided into at least five branch reaction zones by the bottom flow plate and the overflow weir; a stirring paddle is arranged in each branch reaction zone; at least five airsucking holes are formed in the top end of the reaction tank; each air sucking hole is communicated with one branch reaction zone; hydrochloric acid feeding holes are respectively formed in at leastthree branch reaction zones; a branch reaction zone at the front end of the reaction tank is communicated with a phosphate tailing feeding hole; a branch reaction zone at the rear end of the reactiontank is communicated with a discharge hole and an emptying hole. The reaction tank is simple in structure, convenient in reaction time control and liquid level control, convenient in continuous production, and capable of meeting industrial production for decomposing phosphate tailings with hydrochloric acid and recycling phosphorus and calcium in the phosphate tailings.
Description
technical field [0001] The invention relates to a reaction tank used in industrial production, in particular to a multistage reaction tank used for hydrochloric acid decomposition of phosphorus tailings. Background technique [0002] Phosphate rock is an important raw material for phosphate fertilizer, the fertilizer required for global agricultural production, and an important guarantee for global food production; it is also a raw material for the production of fine chemical products. More than 90% of the phosphate rock in my country has a grade of less than 26%, with an average grade of about 17%. With the continuous development of phosphate rock resources, the production capacity of wet-process phosphoric acid continues to expand, and the output of phosphorus tailings also continues to accumulate, which not only causes a lot of waste of resources, but also brings serious environmental problems and increases production costs. . How to recycle phosphorus tailings and tu...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01J19/18B01J19/00C01B25/22C01F11/46C01F5/14
CPCB01J19/18B01J19/0006B01J19/0013B01J19/0066B01J2219/00081B01J2219/00182C01B25/2212C01F5/14C01F11/46
Inventor 方超田承涛肖林波李攀红周玲玲
Owner HUBEI SANNING CHEM