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System and method for recycling and utilizing waste sulfuric acid to produce phosphate and compound fertilizer

A technology of waste sulfuric acid and acid feeding, which is applied in the direction of application, fertilization equipment, fertilizer mixture, etc., can solve the problems of ineffective recycling of waste sulfuric acid, and achieve the effect of saving enterprise cost resources and avoiding pollution

Inactive Publication Date: 2014-04-23
陕西比迪欧化工有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a system and method for recycling waste sulfuric acid to produce phosphate compound fertilizer, which solves the problem that the prior art cannot effectively recycle waste sulfuric acid and recycle it

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  • System and method for recycling and utilizing waste sulfuric acid to produce phosphate and compound fertilizer

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0015] A kind of waste sulfuric acid recycling system of the present invention produces phosphorus compound fertilizer, and its structure is as follows figure 1 As shown, it includes a waste sulfuric acid storage tank 1, a waste sulfuric acid high-level tank 3, a concentrated phosphoric acid storage tank 2 and a neutralization reaction tank 6; the waste sulfuric acid high-level tank 3 is arranged above the waste sulfuric acid storage tank 1, and the waste sulfuric acid storage tank The acid outlet of the tank 1 is connected with the acid inlet of the waste sulfuric acid high level tank 3 through a pipeline, and a pump 4 is arranged on the pipeline;

[0016] The acid outlet of the waste sulfuric acid head tank 3 is connected with the acid inlet of the concentrated phosphoric acid storage tank 2 through a pipeline, and a flow meter 5 is arranged on the pipeli...

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Abstract

The invention discloses a system and a method for recycling and utilizing waste sulfuric acid to produce phosphate and compound fertilizer. The method comprises: utilizing the system for recycling and utilizing waste sulfuric acid to produce phosphate and compound fertilizer, wherein the system comprises a waste sulfuric acid storage tank, a waste sulfuric acid header tank, a strong phosphoric acid storage tank and a neutralization reaction tank; mixing the waste sulfuric acid with phosphoric acid, and reacting the mixture with ammonia in the neutralization reaction tank; and then, performing pelleting, drying, sieving and cooling procedures on the obtained phosphate and compound fertilizer pulp to obtain qualified phosphate and compound fertilizer products. Therefore, the problem that the waste sulfuric acid can not be effectively recycled and utilized in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, relates to a system for recycling waste sulfuric acid to produce compound phosphorus fertilizer, and also relates to a method for producing compound phosphorus fertilizer by recycling waste sulfuric acid based on the above system. Background technique [0002] In the process of producing 1,4-butanediol (BDO), it is necessary to use concentrated sulfuric acid to treat and purify the acetylene gas produced by the calcium carbide method, and use the purified acetylene to carry out alkyne aldehyde condensation reaction to produce 1,4-butanediol (BDO). In the process of using concentrated sulfuric acid to treat acetylene gas, a large amount of industrial waste sulfuric acid will be produced. How to effectively purify and recycle these waste sulfuric acid has always been a difficult problem in the BDO production industry. [0003] Generally, when industrial waste sulfuric acid is rich in in...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 宋鹏王发定张永辉张军强王向文张安
Owner 陕西比迪欧化工有限公司
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