CN203440066U - Device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas - Google Patents
Device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas Download PDFInfo
- Publication number
- CN203440066U CN203440066U CN201320561142.6U CN201320561142U CN203440066U CN 203440066 U CN203440066 U CN 203440066U CN 201320561142 U CN201320561142 U CN 201320561142U CN 203440066 U CN203440066 U CN 203440066U
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- tower
- iodine
- sealing groove
- surface filter
- absorption
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Abstract
The utility model discloses a device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas. The device comprises a gas washing tower, a surface filter, a heat exchanger, an iodine resolving tower and an iodine absorption tower; a washing tower sealing groove is formed in the bottom end of the gas washing tower and is connected with the surface filter through a liquid inlet pump of the surface filter; a clear liquid outlet of the surface filter leads to a buffer sealing groove; a washing circulating pump connected with the buffer sealing groove is connected to the heat exchanger and the iodine resolving tower through a pipeline; a reducing agent inlet pipe is arranged on a pipeline allowing the outlet of the heat exchanger to be communicated to the gas washing tower; an outlet in the bottom of the iodine resolving tower leads to the buffer sealing groove; an outlet in the top of the iodine resolving tower leads to the iodine absorption tower; an absorption tower sealing groove in the bottom of the iodine absorption tower is connected to a spraying system of the absorption tower through an absorption liquid circulating pump. The device can effectively reclaim iodine in tail gas in phosphorus chemical production, solves the problem of silica gel blockage during reclaiming, and reclaims the resources of fluorine and silicon carried by the tail gas.
Description
Technical field
The utility model relates to vent gas treatment, relates in particular to the tail gas unit such as phosphoric acid by wet process, thermal phosphoric acid, phosphate fertilizer, yellow phosphorus.
Background technology
Any iodine process of carrying, the first step all must become the iodine existing in feed liquid into unbound state by oxidation (or reduction).If iodine concentration is lower in raw material, free-iodine is dissolved state and is present in feed liquid, if iodine concentration higher (as nitre mother liquor) has surpassed the solubleness of iodine, just has solid iodine crystallization, after separation, can obtain thick iodine.
From phosphorus ore, extract iodine, mainly contain hot method technique and wet processing.There is the chemical reaction (or reaction of phosphorus ore derived product participation) that phosphorus ore participates in no matter be hot method phosphorous chemical industry or wet method phosphorous chemical industry, in tail gas, all to contain fluorine, silicon and iodine resource.Iodine in gas phase is molecule I 2 and HI state, and fluorine is the complicated ingredients such as SiF4 and HF.At present, the technical scheme that reclaims iodine in tail gas has some, but is all for reclaim and extract iodine in the iodin-containing liquid body in phosphorous chemical industry production process, do not reclaim fluorine and the silicon resource in tail gas, and in implementation process, easily occur silica gel blocking problem simultaneously.
Summary of the invention
The purpose of this utility model be to provide a kind of from phosphorous chemical industry tail gas the device of iodine, fluorine, silicon resource, not only reclaim the iodine in tail gas in phosphorous chemical industry production, and efficiently solve silica gel blocking problem in removal process, reclaim fluorine and the silicon resource in tail gas, carried secretly simultaneously.
The device that reclaims iodine, fluorine, silicon resource from receive phosphorous chemical industry tail gas of the present utility model, comprising: gas wash tower, surface filter, interchanger, iodine Analytic Tower and iodine absorption tower; The entrance of described gas wash tower is arranged on tower body below, and the bottom of gas wash tower arranges washing tower sealing groove; Described washing tower sealing groove is connected with surface filter by surface filter liquid feeding pump, the bottom outlet of described surface filter is provided with filter seal groove, filter seal groove is provided with silica gel transferpump, and the purified liquor outlet of described surface filter leads to cushion seal groove; Described cushion seal groove is connected with detergent circulator, and described cleaning circulation pump has respectively pipeline to be connected to interchanger and iodine Analytic Tower, and described heat exchanger exit is communicated to gas wash tower; The pipeline that described interchanger is communicated with gas wash tower is provided with reductive agent inlet tube; Cushion seal groove is led in the washing lotion outlet of described iodine Analytic Tower bottom, and the bottom of described iodine Analytic Tower is provided with gas blower, and the top exit of iodine Analytic Tower leads to iodine absorption tower; Bottom, described iodine absorption tower is provided with absorption tower sealing groove, and described absorption tower sealing groove is connected to the sprinkling system on absorption tower by absorption liquid recycle pump.
Workflow of the present utility model is:
(1) containing the phosphorous chemical industry tail gas of iodine fluorine silicon, enter gas wash tower, be recycled washings iodine, fluorine, silicon is wherein washed and gets off to enter liquid phase, the clean gas after being washed enters atmosphere.Washing lotion liquid is sent into surface filter by surface filter liquid feeding pump and is filtered silica gel, and clear liquid overflows from surface filter upper strata to be sent into interchanger by detergent circulator and cool to below 60 degrees Celsius, enters gas wash tower circulation cleaning after adding reductive agent.
(2) silica gel in surface filter is concentrated to solid content and reaches 15% when above, with silica gel transferpump, delivers to pressure filter filter-press dehydration, and liquid retrieval system recycles, and the filter cake obtaining is as the raw material of white carbon black production.
(3) in gas scrubbing system, in washing lotion, iodine concentration reaches 30ppm when above, separate a part of washing lotion, in washing lotion, add appropriate oxygenant, ion iodine in washing lotion is oxidized to molecule iodine, then send into iodine Analytic Tower, gas blower enters air from tower bottom blowing, in Ta Nei and washing lotion counter current contact, iodine in washing lotion enters in air, and enrichment is carried out with entering after reductive agent reduction in the iodine absorption tower that enters back containing iodine air in washing lotion.Be enriched to after finite concentration and be oxidized and analyse iodine, obtain thick iodine product.
(4) washing lotion after resolved iodine is returned to cushion seal groove and is carried out circulation cleaning tail gas.
Advantage of the present utility model: the iodine in can efficient recovery phosphorous chemical industry producing in tail gas, also solved silica gel blocking problem in removal process, reclaim fluorine and the silicon resource in tail gas, carried secretly simultaneously.In addition, the utility model in use, does not produce new waste water, cleverly fluorine, silicon, iodine is carried out to concentration and separation, obtains corresponding product.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: the 1st, gas wash tower, the 2nd, surface filter, the 3rd, interchanger, the 4th, iodine Analytic Tower, the 5th, iodine absorption tower, the 6th, washing tower sealing groove, the 7th, filter seal groove, the 8th, cushion seal groove, the 9th, absorption tower sealing groove, the 10th, induced draft fan, the 11st, silica gel transferpump, the 12nd, detergent circulator, the 13rd, absorption liquid recycle pump, the 14th, gas blower, the 15th, surface filter liquid feeding pump.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
A device that reclaims iodine, fluorine, silicon resource from receive phosphorous chemical industry tail gas, comprising: gas wash tower 1, surface filter 2, interchanger 3, iodine Analytic Tower 4 and iodine absorption tower 5; The entrance of described gas wash tower 1 is arranged on tower body below, and the bottom of gas wash tower 1 arranges washing tower sealing groove 6; Described washing tower sealing groove 6 is connected with surface filter 2 by surface filter liquid feeding pump 15, the bottom outlet of described surface filter 2 is provided with filter seal groove 7, filter seal groove 7 is provided with silica gel transferpump 11, and the purified liquor outlet of described surface filter 2 leads to cushion seal groove 8; Described cushion seal groove 8 is connected with detergent circulator 12, and described detergent circulator 12 has respectively pipeline to be connected to the spray thrower of interchanger 3 and iodine Analytic Tower 4, and described interchanger 3 outlets are communicated to the spray thrower of gas wash tower 1; The pipeline that described interchanger 3 is communicated with gas wash tower 1 is provided with reductive agent inlet tube; Cushion seal groove 8 is led in the washing lotion outlet of described iodine Analytic Tower 4 bottoms, and the bottom of described iodine Analytic Tower 4 is provided with gas blower 14, and the top exit of iodine Analytic Tower 4 leads to iodine absorption tower 5; 5 bottoms, described iodine absorption tower are provided with absorption tower sealing groove 9, and described absorption tower sealing groove 9 is connected to the spray thrower on absorption tower 5 by absorption liquid recycle pump 13.
Claims (1)
1. from phosphorous chemical industry tail gas, reclaim a device for iodine, fluorine, silicon resource, it is characterized in that this device comprises: gas wash tower (1), surface filter (2), interchanger (3), iodine Analytic Tower (4) and iodine absorption tower (5); The entrance of described gas wash tower (1) is arranged on tower body below, and the bottom of gas wash tower (1) arranges washing tower sealing groove (6); Described washing tower sealing groove (6) is connected with surface filter (2) by surface filter liquid feeding pump (15), the bottom outlet of described surface filter (2) is provided with filter seal groove (7), filter seal groove (7) is provided with silica gel transferpump (11), and the purified liquor outlet of described surface filter (2) leads to cushion seal groove (8); Described cushion seal groove (8) is connected with detergent circulator (12), and described detergent circulator (12) has respectively pipeline to be connected to interchanger (3) and iodine Analytic Tower (4), and described interchanger (3) outlet is communicated to gas wash tower (1); Described interchanger (3) is provided with reductive agent inlet tube with the pipeline that gas wash tower (1) is communicated with; Cushion seal groove (8) is led in the washing lotion outlet of described iodine Analytic Tower (4) bottom, and the bottom of described iodine Analytic Tower (4) is provided with gas blower (14), and the top exit of iodine Analytic Tower (4) leads to iodine absorption tower (5); Bottom, described iodine absorption tower (5) is provided with absorption tower sealing groove (9), and described absorption tower sealing groove (9) is connected to the sprinkling system of absorption tower (5) by absorption liquid recycle pump (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561142.6U CN203440066U (en) | 2013-09-11 | 2013-09-11 | Device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561142.6U CN203440066U (en) | 2013-09-11 | 2013-09-11 | Device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203440066U true CN203440066U (en) | 2014-02-19 |
Family
ID=50091135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320561142.6U Expired - Lifetime CN203440066U (en) | 2013-09-11 | 2013-09-11 | Device for reclaiming resources of iodine, fluorine and silicon in phosphorus chemical tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203440066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258782A (en) * | 2014-09-29 | 2015-01-07 | 国药嘉远国际贸易公司 | Spraying and fluidizing granulation tower for manufacturing hollow iodine granules and iodine |
-
2013
- 2013-09-11 CN CN201320561142.6U patent/CN203440066U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258782A (en) * | 2014-09-29 | 2015-01-07 | 国药嘉远国际贸易公司 | Spraying and fluidizing granulation tower for manufacturing hollow iodine granules and iodine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
|
| CX01 | Expiry of patent term |