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Chemical engineering device for secondary hydration of phosphoric acid

A chemical equipment, phosphoric acid two technology, applied in the field of phosphoric acid, can solve the problems of difficulty in obtaining partial phosphoric acid, high temperature, etc., and achieve the effect of significant heat exchange effect and high heat exchange effect

Inactive Publication Date: 2018-12-18
什邡市治谋化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide chemical equipment for the secondary hydration of phosphoric acid, to solve the problem in the prior art that the temperature in the hydration container is extremely high and it is difficult to obtain metaphosphoric acid in the production process of phosphoric acid, and to realize the relief of hydration in the hydration container during the production of phosphoric acid. Continuous high temperature, easy to prepare metaphosphoric acid

Method used

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  • Chemical engineering device for secondary hydration of phosphoric acid
  • Chemical engineering device for secondary hydration of phosphoric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] like figure 1 and figure 2 The chemical equipment shown for the secondary hydration of phosphoric acid includes a hydration tower 1, a water inlet pipe 2 and a water outlet pipe 3 that are communicated with the hydration tower 1, a plug 4 is provided on the water outlet pipe 3, and the water inlet pipe is 2 is located at the top of the hydration tower 1, the water outlet pipe 3 is located at the bottom of the hydration tower 1, and a gate valve 5 is arranged inside the hydration tower 1, and when the gate valve 5 is closed, the interior of the hydration tower 1 is divided into upper, The lower two parts, wherein the space above the gate valve 5 is the primary hydration chamber 11, and the space below the gate valve 5 is the secondary hydration chamber 12; it also includes a gas delivery pipe, which includes a diameter from the inside to the outside. The first metal tube 6, the second metal tube 7, and the ceramic tube 8 are distributed in the direction. The first meta...

Embodiment 2

[0020] like figure 1 and figure 2The chemical equipment shown for the secondary hydration of phosphoric acid, on the basis of the embodiment, the gas pipeline includes a horizontal section and an inclined section that are connected in turn, and the inclined section is from one end of the horizontal section to the primary hydration chamber 11. The direction slopes down. The circulation port 9 is located at the end connecting the horizontal section and the inclined section, and the annular space between the second metal tube 7 and the ceramic tube 8 is blocked at the end connecting the horizontal section and the inclined section. The gate valve 5 is a pneumatic gate valve, and the cylinder 10 of the pneumatic gate valve is fixed on a mounting bracket 13 , and the mounting bracket 13 is fixed on the outer side wall of the hydration tower 1 . The guide tube 9 is a metal corrugated hose.

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Abstract

The invention discloses a chemical engineering device for secondary hydration of phosphoric acid. The device comprises a hydration tower, and a water inlet tube and a water outlet tube which are communicated with the hydration tower, the water inlet tube is located at the top of the hydration tower, a gate valve is arranged in the hydration tower, a space above the gate valve is a primary hydration chamber, and a space below the gate valve is a secondary hydration chamber; the system further comprises a gas conveying pipeline, and the gas conveying pipeline includes a first metal tube, a second metal tube and a ceramic tube which are distributed along a radial direction from the inside to the outside; and the first metal tube goes through the hydration tower, an annular space between the second metal tube and the first metal tube is communicated with the primary hydration chamber, one end, close to the hydration tower, of an annular space between the second metal tube and the ceramic tube is connected to a flow guiding tube, and the flow guiding tube spirally covers the outer surface of the secondary hydration chamber. The device is used for solving the problem of extremely high temperature in a hydration container in the phosphoric acid production process in the prior art in order to achieve the purpose of alleviating the continuous high temperature in the hydration containerin the phosphoric acid production process and easily preparing metaphosphoric acid.

Description

technical field [0001] The invention relates to the field of phosphoric acid, in particular to chemical equipment used for the secondary hydration of phosphoric acid. Background technique [0002] Phosphoric acid or orthophosphoric acid, formula H 3 PO 4 , with a molecular weight of 97.994, is a common inorganic acid and a medium-strong acid. It can be obtained by dissolving phosphorus pentoxide in hot water. Orthophosphoric acid is obtained by treating apatite with sulfuric acid in industry. Phosphoric acid is easily deliquescent in the air. Heating will lose water to obtain pyrophosphoric acid, and then further lose water to obtain metaphosphoric acid. Phosphoric acid is mainly used in the pharmaceutical, food, fertilizer and other industries, including as a rust inhibitor, food additive, dental and orthopedic, EDIC corrosive, electrolyte, flux, dispersant, industrial corrosive, fertilizer, raw material and component of household cleaning products. Also used as a che...

Claims

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Application Information

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IPC IPC(8): B01J19/24B01J19/00C01B25/18
CPCB01J19/24B01J19/0013B01J19/0053B01J2219/0009B01J2219/00092C01B25/18
Inventor 陆建国
Owner 什邡市治谋化工有限公司
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