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A kind of ferric phosphate production system and method for preparing ferric phosphate by heat recycling

A production system, ferric phosphate technology, applied in the direction of ferric sulfate, chemical instruments and methods, phosphorus compounds, etc., can solve the problems of high energy consumption, waste of heat and circulating water, unfavorable environmental protection and other problems in the ferric phosphate production system, and achieve reduction The effect of energy consumption of heat source, reduction of energy consumption of cold source, and saving of heat source for heating

Active Publication Date: 2019-12-10
GUANGZHOU TINCI MATERIALS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing iron phosphate production system has high energy consumption, which is mainly reflected in the repeated heating and cooling of the reaction solution
This wastes a lot of heat and circulating water
Thereby increasing the cost of iron phosphate, which is not conducive to environmental protection

Method used

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  • A kind of ferric phosphate production system and method for preparing ferric phosphate by heat recycling

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Embodiment 1

[0033] A ferric phosphate production system for heat recycling, comprising successively connected ferrous preparation kettle 1, oxidation kettle 4; parallel first reaction kettle 11, second reaction kettle 7, third reaction kettle 13; washing press system and High temperature dehydration system 16; also includes liquid caustic soda feed port; temperature monitoring device; temperature control device; ferrous heat exchanger 3; first heat exchanger 6; second heat exchanger 9 and the third heat exchanger 15; The functions of the attachment are as follows:

[0034] The ferrous preparation kettle 1 is used to react the raw materials comprising sulfuric acid, phosphoric acid, iron powder, and deionized water to form a ferrous stock solution; the oxidation kettle 4 is used to oxidize the ferrous ions in the ferrous stock solution into ferric ions to form Ferric ion stock solution; the first reactor 11, the second reactor 7, and the third reactor 13 are used to react the ferric ion st...

Embodiment 2

[0038] A kind of technology that utilizes the production system of embodiment 1 to prepare ferric phosphate, specifically, the raw material that comprises iron powder, sulfuric acid, phosphoric acid, deionized water enters ferrous preparation kettle 1 according to certain ratio, generates ferrous stock solution, reacts and discharges in large quantities heat, the reaction temperature is about 85°C; the ferrous stock solution enters the ferrous heat exchanger 3 through the ferrous transport pump 2, and exchanges heat with the liquid caustic soda diluted by the mixer 10, and the ferrous stock solution cools down to about 40°C, and the liquid caustic soda Preheating (complete the heat exchange between the high-temperature ferrous stock solution and the low-temperature liquid caustic soda in the ferrous heat exchanger); the ferrous stock solution after cooling enters the oxidation kettle 4, adds hydrogen peroxide to oxidize, and is oxidized into a ferric ferrous stock solution; The...

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Abstract

The invention discloses a ferric phosphate production system with heat circulation. The ferric phosphate production system comprises a ferrous preparation kettle (1), an oxidation kettle (4), a firstreaction kettle (11), a second reaction kettle (7), a third reaction kettle (13), a washing squeezing system, a high-temperature dehydration system (16), a temperature sensor, a heat conduction oil temperature control device, a ferrous heat exchanger (3), a first heat exchanger (6), a second heat exchanger (9) and a third heat exchanger (15), wherein the ferrous preparation kettle (1) and the oxidation kettle (4) are communicated in sequence; the first reaction kettle (11), the second reaction kettle (7) and the third reaction kettle (13) are connected in parallel; the ferrous heat exchanger (3) is connected with a liquid alkali feeding and ferrous preparation kettle (1); the first heat exchanger (6) is connected with feeding of the second reaction kettle (7) and discharge of the first reaction kettle (11); the second heat exchanger (9) is connected with feeding of the third reaction kettle (13) and discharge of the second reaction kettle (7); the third heat exchanger (15) is connectedwith feeding of the first reaction kettle (11) and discharge of the third reaction kettle (13); the heat exchangers (6, 9, 15) are used for exchanging heat of high-temperature materials and low-temperature materials connected with the heat exchangers, and thus heat in the reaction process is sufficiently circulated. The ferric phosphate production system is beneficial to energy conservation, andthe production is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron phosphate production and preparation, and in particular relates to an iron phosphate production system for process heat recycling and a method for preparing iron phosphate. Background technique [0002] The existing iron phosphate production system has high energy consumption, which is mainly reflected in the repeated heating and cooling of the reaction solution. This wastes a lot of heat and circulating water. Thereby the cost of iron phosphate is increased, which is not conducive to environmental protection. Contents of the invention [0003] In order to overcome the above defects, the present invention provides an iron phosphate production system capable of realizing heat recycling and a method for preparing iron phosphate by using it, which is beneficial to energy saving and production cost reduction. [0004] The technical scheme of the present invention is a ferric phosphate production syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/37C01G49/14
CPCY02P20/10
Inventor 龙锦田湛秋赵杰王孟杰曾鹏欧阳志勇
Owner GUANGZHOU TINCI MATERIALS TECH
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