CN101811670A - Method for heating extractant in process of extracting iodine by using iodine-containing phosphorus ores as raw material - Google Patents
Method for heating extractant in process of extracting iodine by using iodine-containing phosphorus ores as raw material Download PDFInfo
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- CN101811670A CN101811670A CN 201010144399 CN201010144399A CN101811670A CN 101811670 A CN101811670 A CN 101811670A CN 201010144399 CN201010144399 CN 201010144399 CN 201010144399 A CN201010144399 A CN 201010144399A CN 101811670 A CN101811670 A CN 101811670A
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Abstract
The invention provides a method for heating an extractant in the process of extracting iodine by using iodine-containing phosphorus ores as a raw material. The method comprises the following steps of: using an original shell and tube heat exchanger for heating the extractant as heating equipment, making the extractant pass through tubes, and making condensate in the process of wet method phosphoric acid production condensation pass between the tubes, wherein the indirect heat exchange is performed between the extractant and the condensate, so that the temperature of the extractant is improved; and the temperature of the extractant entering the heat exchanger is controlled to 25 DEG C, and the temperature of the extractant discharged is controlled to between 45 and 75 DEG C. Compared with the prior art, because the process adopts the condensate heating extractant technology, the process has the advantages of reasonably controlling the temperature of the extractant, reducing scales on the equipment, prolonging the starting time of a system, solving the problem that the acid concentration is lowered because the vapor is directly added to bring in water, reasonably using the secondary heat source and lowering energy consumption, and lowering production cost; and the process is applied to enterprises extracting iodine from the phosphorus ores.
Description
Technical field
The present invention relates to iodine, specifically, relating in to contain the iodine Rock Phosphate (72Min BPL) is the technological process that raw material extracts iodine, furthermore, relates to the heating means of extraction agent in this process.
Background technology
Iodine often is present in the multiple Mineral resources with the form of associated minerals, and phosphorus ore association iodine resource reclaims the appearance of industrialization technology, makes phosphorus ore iodine obtain extracting and utilizing.
Extracting iodine from phosphorus ore mainly is to utilize the phosphoric acid of phosphorus ore production to carry out as raw material, this Technology has been documented in Chinese patent No. 200510003058.2 " extracting the method for iodine from contain the iodine phosphate ore production in the dilute phosphoric acid that produces " lining.Produce in the process of phosphoric acid at phosphorus ore, iodine as associated minerals enters into phosphoric acid with ionic forms, can make it from phosphoric acid, to separate behind the medicament with molecular conformation in addition, the phosphoric acid that will contain molecular iodine then pumps in the extraction tower, finally utilize its physico-chemical property, it is extracted in extraction tower by adding extraction agent, the circulation through absorption liquid absorbs again, arrive behind the finite concentration absorption liquid changed over to and analyse the iodine groove and carry out crystallization, obtain iodine.The extraction agent temperature controlling is the key of extraction in the process of extraction absorption iodine, and sieve plate is stopped up in the fouling meeting that the low then equipment of extraction temperature produces, and makes system will be forced to parking and handles.Therefore extraction agent must be heated.Original method is to use steam heating, must consumed energy.
Summary of the invention
The purpose of this invention is to provide to contain the iodine Rock Phosphate (72Min BPL) is the heating means that raw material extracts extraction agent in the iodine process, with the problem of solution extraction agent heating, thereby reduces energy consumption, and can satisfy processing requirement.
The contriver finds that through repetition test and after studying condensate temperature is controlled at 90 ℃～110 ℃ in the Wet-process Phosphoric Acid Production concentration process, can be as the thermal source of extraction agent heating.Therefore, the heating means of the extraction agent that the contriver provides, be to utilize the shell and tube heat exchanger of original heating extraction agent as heating installation, extraction agent passes through from pipe, phlegma in the Wet-process Phosphoric Acid Production concentration process passes through between pipe, both carry out indirect heat exchange, thereby improve the temperature of extraction agent.
In the aforesaid method, the condensate temperature that enters interchanger is controlled at 90 ℃～110 ℃, and the condensate temperature of going out is controlled at below 70 ℃; The extraction agent temperature that enters interchanger is at 25 ℃, and the extraction agent temperature of going out is controlled at 45 ℃～75 ℃.
In the aforesaid method, the temperature of phlegma and extraction agent is to realize by the aperture of controlling the heat exchanger inlet and outlet valve.
The present invention compares with prior art, owing to adopted phlegma to heat the extraction agent technology, has reasonably controlled the extraction agent temperature, reduces equipment scaling, and the prolongation system drives the time, stops steam and brings moisture reduction acid concentration into direct the adding; Reasonable use secondary heat source, reduced the consumption of the energy, reduced production cost.Be applicable to the manufacturing enterprise that extracts iodine from Rock Phosphate (72Min BPL).
Description of drawings
Accompanying drawing is a method synoptic diagram of the present invention.
Embodiment
By the following examples, further specify beneficial effect of the present invention.
In phosphate fertilizer plant of urn good fortune (group) company, carry iodine workshop section, the shell and tube heat exchanger that utilizes original heating extraction agent is as heating installation, temperature is passed through from pipe at 25 ℃ extraction agent, and temperature is passed through between pipe at 90 ℃～110 ℃ phlegmas, both carry out indirect heat exchange, by control imported valve aperture, the condensate temperature that makes away is below 70 ℃, and the extraction agent temperature rises to 45 ℃～75 ℃.
Claims (3)
1. be the heating means that raw material extracts extraction agent in the iodine process to contain the iodine Rock Phosphate (72Min BPL), it is characterized in that this method is to utilize the shell and tube heat exchanger of original heating extraction agent as heating installation, extraction agent passes through from pipe, phlegma in the Wet-process Phosphoric Acid Production concentration process passes through between pipe, both carry out indirect heat exchange, thereby improve the temperature of extraction agent.
2. heating means as claimed in claim 1 is characterized in that the described condensate temperature that enters interchanger is controlled at 90 ℃～110 ℃, and the condensate temperature of going out is controlled at below 70 ℃; The extraction agent temperature that enters interchanger is at 25 ℃, and the extraction agent temperature of going out is controlled at 45 ℃～75 ℃.
3. as the described heating means in one of claim 1 or 2, the temperature that it is characterized in that described phlegma and extraction agent is to realize by the aperture of controlling the heat exchanger inlet and outlet valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010144399 CN101811670A (en) | 2010-04-12 | 2010-04-12 | Method for heating extractant in process of extracting iodine by using iodine-containing phosphorus ores as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010144399 CN101811670A (en) | 2010-04-12 | 2010-04-12 | Method for heating extractant in process of extracting iodine by using iodine-containing phosphorus ores as raw material |
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| Publication Number | Publication Date |
|---|---|
| CN101811670A true CN101811670A (en) | 2010-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010144399 Pending CN101811670A (en) | 2010-04-12 | 2010-04-12 | Method for heating extractant in process of extracting iodine by using iodine-containing phosphorus ores as raw material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877244A (en) * | 2021-12-08 | 2022-01-04 | 东营威联化学有限公司 | Aromatic hydrocarbon extraction device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1706744A (en) * | 2005-04-29 | 2005-12-14 | 贵州宏福实业开发有限总公司 | Process of extracting iodine from dilute phosphoric acid produced in iodine-containing phosphate ore production |
| CN101530675A (en) * | 2009-04-21 | 2009-09-16 | 瓮福（集团）有限责任公司 | Method for delaying deposition of sieve plate of extraction column |
| CN101531340A (en) * | 2009-04-16 | 2009-09-16 | 瓮福（集团）有限责任公司 | Method for manufacturing heat exchanger in the technique of extracting iodine in phosphoric acid |
-
2010
- 2010-04-12 CN CN 201010144399 patent/CN101811670A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1706744A (en) * | 2005-04-29 | 2005-12-14 | 贵州宏福实业开发有限总公司 | Process of extracting iodine from dilute phosphoric acid produced in iodine-containing phosphate ore production |
| CN101531340A (en) * | 2009-04-16 | 2009-09-16 | 瓮福（集团）有限责任公司 | Method for manufacturing heat exchanger in the technique of extracting iodine in phosphoric acid |
| CN101530675A (en) * | 2009-04-21 | 2009-09-16 | 瓮福（集团）有限责任公司 | Method for delaying deposition of sieve plate of extraction column |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877244A (en) * | 2021-12-08 | 2022-01-04 | 东营威联化学有限公司 | Aromatic hydrocarbon extraction device |
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Open date: 20100825 |