CN104828794B - The method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases - Google Patents
The method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases Download PDFInfo
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- CN104828794B CN104828794B CN201510232197.6A CN201510232197A CN104828794B CN 104828794 B CN104828794 B CN 104828794B CN 201510232197 A CN201510232197 A CN 201510232197A CN 104828794 B CN104828794 B CN 104828794B
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- scrubbing tower
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Abstract
A kind of method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases, the high-temperature flue gas discharged by liquid waste incinerator is through chilling scrubbing tower, again through clear water scrubbing tower washing absorption, remaining flue gas discharges after processing by aftertreatment device again, and phosphoric acid liquid obtains from the bottom of the tower of chilling scrubbing tower.The chilling cleaning solution of chilling scrubbing tower divides chilling liquid and circulating cleaning solution two kinds, respectively the circulating cleaning solution shower ejection in the middle part of the chilling cleaning solution spray head and tower on tower top；The cleaning solution of clear water scrubbing tower distinguishes water and circulating cleaning solution two kinds, respectively the circulating cleaning solution shower ejection in the middle part of the clear water shower and tower on tower top.The method of the present invention not only makes high-temperature flue gas be cooled down rapidly, is prevented effectively from two English and re-generates, and utilizes the hydrophilic characteristics of phosphorus pentoxide, two grades of water are used to absorb, obtaining the phosphoric acid liquid of higher concentration, phosphoric acid liquid concentration can reach more than 30%, beneficially the recycling of phosphoric acid liquid.
Description
Technical field
The invention belongs to environmental protection and resource recycling technology and equipment field, particularly relate to a kind of from three formicester liquid waste incinerations
Fire grate puts the method reclaiming phosphorus pentoxide in flue gas.
Background technology
Orthene is domestic and international widely used organophosphorus insecticide, the pesticide species of Ye Shi China largest production tonnage
One of.The production technology of the current former medicine of domestic orthene is all with phosphorus thiochloride as raw material, through secondary alcoholysis, ammonolysis,
Catalytic isomerization, more acylated prepared.In phosphorus thiochloride alcoholysis process, the final stage of its consecutive reaction has part accessory substance front three
Base sulfydryl phosphate (being called for short " trimethyl ") generates, and generally has the trimethyl of 5～10%, and is present in it as impurity
In rear each step intermediate.One of way processing three formicesters is burning disposal, and three formicesters are mainly sulfur-bearing, phosphorus, chlorine, nitrogen
Deng organic liquid waste, wherein: phosphorus content is 21.69%, nitrogen content 3.95%, sulfur content 0.019%, chlorinity 0.0027%,
The calorific value of this organic liquid waste is higher, can carry out waste heat recovery after burning, produces certain economic benefit, but produces after burning
The raw sour gas such as substantial amounts of phosphorus pentoxide and a small amount of sulfur dioxide, hydrogen chloride, also needs to reclaim phosphorus pentoxide.
Summary of the invention
It is contemplated that propose a kind of method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases, it is achieved
The comprehensive utilization of resource.
This from three formicester liquid waste incinerators discharge flue gases, reclaim the method for phosphorus pentoxide be: by three formicester liquid waste incinerations
The high-temperature flue gas that fire grate is put is through chilling scrubbing tower, again through clear water scrubbing tower washing absorption, and remaining flue gas uses subsequent treatment again
Device discharges after processing, and phosphoric acid liquid obtains from the bottom of the tower of chilling scrubbing tower.High-temperature flue gas enters from chilling scrubbing tower tower top
Enter, from the middle and lower part of chilling scrubbing tower out, then enter from the middle and lower part of clear water scrubbing tower, from the top of clear water scrubbing tower
Discharge residue flue gas.The chilling cleaning solution of chilling scrubbing tower divides chilling liquid and circulating cleaning solution two kinds, and chilling liquid is that clear water is washed
Wash the cleaning solution discharged at the bottom of tower tower, the chilling cleaning solution spray head ejection from chilling scrubbing tower top；Circulating cleaning solution is anxious
Cold liquid flow is to the liquid at the bottom of tower, the circulating cleaning solution shower ejection in the middle part of chilling scrubbing tower.The washing of clear water scrubbing tower
Liquid distinguishes water and circulating cleaning solution two kinds, and clear water is from the outside entrance of tower, the clear water shower spray from tower top, and circulation is washed
Washing liquid is to flow to the liquid at the bottom of tower after clear water sprays, the circulating cleaning solution shower ejection in the middle part of clear water scrubbing tower.This
From three formicester liquid waste incinerators discharge flue gases, reclaim the device used by the method for phosphorus pentoxide include chilling scrubbing tower, clear
Water wash column, the first circulating pump, the second circulating pump and discharging regulation valve；Incineration flue gas import is arranged at the top of chilling scrubbing tower,
The import of the chilling cleaning solution spray head on chilling scrubbing tower top is connected with the second circulation delivery side of pump, entering of the second circulating pump
Mouth is connected with the liquid outlet of clear water wash tower bottoms, the import and first of the circulating cleaning solution shower in the middle part of chilling scrubbing tower
Circulation delivery side of pump is connected, and the import of the first circulating pump is connected with the liquid outlet of chilling wash tower bottoms, discharging regulation valve
Import is connected with the first circulation delivery side of pump；Residue exhanst gas outlet is arranged at the top of clear water scrubbing tower, clear water scrubbing tower top
The import of clear water shower is clear water import, the import of the circulating cleaning solution shower in the middle part of clear water scrubbing tower and the second circulation
Delivery side of pump is connected；There is an exhanst gas outlet middle and lower part of chilling scrubbing tower, and there is a flue gas middle and lower part of clear water scrubbing tower
Import, the exhanst gas outlet of chilling scrubbing tower is connected with the gas approach pipeline of clear water scrubbing tower.
The method of the present invention utilizes the hydrophilic characteristics of phosphorus pentoxide, uses clear water to absorb and reclaims phosphoric acid liquid, and clear water is from clearly
After the top of water wash column enters, the flue gas discharged with three formicester liquid waste incinerators in chilling scrubbing tower and clear water scrubbing tower
The most repeatedly contact, while washing phosphorus pentoxide, the phosphoric acid liquid of available higher concentration, beneficially phosphoric acid liquid
Recycling, turns waste into wealth.
Accompanying drawing explanation
Accompanying drawing is the structure of the device used by method reclaiming phosphorus pentoxide phosphoric acid from three formicester liquid waste incineration flue gases
Figure.
Detailed description of the invention
This method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases, by three formicester liquid waste incinerators
The high-temperature flue gas of discharge is through chilling scrubbing tower, again through clear water scrubbing tower washing absorption, and remaining flue gas fills by subsequent treatment again
Putting and discharge after processing, phosphoric acid liquid obtains from the bottom of the tower of chilling scrubbing tower.High-temperature flue gas enters from chilling scrubbing tower tower top,
From the middle and lower part of chilling scrubbing tower out, then enter from the middle and lower part of clear water scrubbing tower, discharge from the top of clear water scrubbing tower
Residue flue gas.The chilling cleaning solution of chilling scrubbing tower divides chilling liquid and circulating cleaning solution two kinds, and chilling liquid is clear water scrubbing tower
The cleaning solution discharged at the bottom of tower, the chilling cleaning solution spray head ejection from chilling scrubbing tower top of the chilling liquid, chilling liquid spray head
Can be one, it is also possible to be several, chilling liquid can be atomized by compressed air, and circulating cleaning solution is chilling liquid flow
To the liquid at the bottom of tower, circulating cleaning solution circulating cleaning solution shower ejection in the middle part of chilling scrubbing tower.Clear water scrubbing tower
Cleaning solution distinguishes water and circulating cleaning solution two kinds, and clear water enters from tower is outside, for water for industrial use or running water, from tower top
Clear water shower spray under, circulating cleaning solution be clear water spray after flow to the liquid at the bottom of tower, following in the middle part of clear water scrubbing tower
Ring cleaning solution shower sprays.
As it can be seen, the device used by this method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases
Valve 15 is regulated including chilling scrubbing tower 1, clear water scrubbing tower the 2, first circulating pump the 17, second circulating pump 25 and discharging.Anxious
Incineration flue gas import 18 is arranged at the top of cold scrubbing tower 1, the import of the chilling cleaning solution spray head 11 on chilling scrubbing tower top with
The outlet of the second circulating pump 25 is connected, and the import of the second circulating pump is connected with the liquid outlet bottom clear water scrubbing tower 2, chilling
The import of the circulating cleaning solution shower 12 in the middle part of scrubbing tower 1 is connected with the outlet of the first circulating pump 17, the first circulating pump
Import be connected with the liquid outlet bottom chilling scrubbing tower 1, the discharging regulation import of valve 15 and going out of the first circulating pump 17
Mouth is connected.Residue exhanst gas outlet 26, entering of the clear water shower 21 on clear water scrubbing tower top are arranged at the top of clear water scrubbing tower 2
Mouth is clear water import, the import of the circulating cleaning solution shower 22 in the middle part of clear water scrubbing tower and the outlet of the second circulating pump 25
It is connected.There is an exhanst gas outlet 19 middle and lower part of chilling scrubbing tower 1, and the middle and lower part of clear water scrubbing tower 2 has a flue gas to enter
Mouth 27, the exhanst gas outlet 19 of chilling scrubbing tower is connected by pipeline with the gas approach 27 of clear water scrubbing tower.
As it can be seen, this from three formicester liquid waste incineration flue gases reclaim phosphorus pentoxide phosphoric acid plant running time, three
The high-temperature flue gas of formicester liquid waste incinerator discharge enters chilling washing from the incineration flue gas import 18 at the top of chilling scrubbing tower 1
Tower, flows from the top down, and the cleaning solution bottom clear water scrubbing tower 2 is carried by the second circulating pump 25, from chilling scrubbing tower 1
Top chilling cleaning solution spray head 11 in spray, flue gas tentatively sprayed, cool down, absorb phosphorus pentoxide, then
Come up by the first circulating pump 17 conveying in the middle part of chilling scrubbing tower 1, the circulation that sprayed by circulating cleaning solution shower 12 is washed
Washing liquid again to spray, cool down, absorb phosphorus pentoxide, then, flue gas flows out from the middle and lower part of chilling scrubbing tower 1, enters
Enter the middle and lower part of clear water scrubbing tower 2.Flue gas flows in clear water scrubbing tower 2 from bottom to top, first by clear water scrubbing tower in the middle part of
Circulating cleaning solution shower 22 ejection circulating cleaning solution washing absorption once, then by clear water scrubbing tower top clear water spray
The clear water washing absorption of shower pipe 21 ejection, last remaining flue gas is from the residue exhanst gas outlet 26 at clear water scrubbing tower 2 top
Output, can process by aftertreatment device such as caustic scrubbers again, then discharge, the clear water of clear water shower 21 be from
The import input of clear water shower 21.This device, the aqueous solution obtained by the bottom of clear water scrubbing tower 2 is as clear water
The circulating cleaning solution sprayed in the middle part of scrubbing tower 2 and the chilling cleaning solution of chilling scrubbing tower 1 top spray, chilling scrubbing tower 1
The aqueous solution obtained by Di Bu, as the circulating cleaning solution of spray in the middle part of chilling scrubbing tower 1, is also phosphoric acid liquid product simultaneously,
Exported by discharging regulation valve 15 by the first circulating pump 17.
As it can be seen, the device used by this method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases
May also include chilling scrubbing tower fluid level controller 14, feed liquor regulation valve 13, clear water scrubbing tower fluid level controller 24, clear water tune
Joint valve 23 and acidity detection device 16.Chilling scrubbing tower fluid level controller 14 is installed in the bottom of chilling scrubbing tower 1, enters
Liquid regulation valve 13 is installed in the import of chilling cleaning solution spray head 11, and the signal of chilling scrubbing tower fluid level controller 14 is defeated
Go out end to be connected with the control signal end of feed liquor regulation valve 13.Clear water regulating valve 23 is installed in the import of clear water shower 21,
Clear water scrubbing tower fluid level controller 24 is installed in the bottom of clear water scrubbing tower 2, the letter of clear water scrubbing tower fluid level controller 24
Number output is connected with the control signal end of clear water regulating valve 23.Acidity detection device 16 is installed in chilling scrubbing tower 1
Bottom, the signal output part of acidity detection device 16 is connected with the control signal end of discharging regulation valve 15.Clear water scrubbing tower 2
The level-control signal that sent by clear water scrubbing tower fluid level controller 24 of clear water inflow by clear water governor valve control, anxious
The level-control signal that the chilling liquid input of cold scrubbing tower 1 is sent by chilling scrubbing tower fluid level controller 14 is washed by chilling
Tower feed liquor governor valve control, the detection that the phosphoric acid liquid concentration of chilling scrubbing tower output is provided by acidity detection device 16 controls letter
Number control phosphoric acid liquid discharging regulation valve aperture size realize.The acid concentration of the phosphoric acid liquid of chilling scrubbing tower output can control
30～45%.
The method of the present invention carries out cooling down, washing by chilling scrubbing tower 1, clear water scrubbing tower 2, not only makes high-temperature flue gas obtain
To cooling down rapidly, it is prevented effectively from two English and re-generates, and utilize the hydrophilic characteristics of phosphorus pentoxide, use two grades of water
Absorbing, obtain the phosphoric acid liquid of higher concentration, its phosphoric acid liquid concentration reaches more than 30%, beneficially the resource profit of phosphoric acid liquid
With, turn waste into wealth.
Claims (2)
1. the method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases, by three formicester liquid waste incinerations
The high-temperature flue gas that fire grate is put is through chilling scrubbing tower, again through clear water scrubbing tower washing absorption, and remaining flue gas uses subsequent treatment again
Device discharges after processing, and phosphoric acid liquid obtains from the bottom of the tower of chilling scrubbing tower；It is characterized in that, high-temperature flue gas is from chilling
Scrubbing tower tower top enters, and from the middle and lower part of chilling scrubbing tower out, then enters from the middle and lower part of clear water scrubbing tower, from clear water
Residue flue gas is discharged at the top of scrubbing tower；The chilling cleaning solution of chilling scrubbing tower divides chilling liquid and circulating cleaning solution two kinds, anxious
Cold liquid is the cleaning solution discharged at the bottom of clear water scrubbing tower tower, the chilling cleaning solution spray head ejection from chilling scrubbing tower top, follows
Ring cleaning solution is that chilling liquid flow is to the liquid at the bottom of tower, the circulating cleaning solution shower ejection in the middle part of chilling scrubbing tower；Clear water
The cleaning solution of scrubbing tower distinguishes water and circulating cleaning solution two kinds, and clear water is from the outside entrance of tower, from the clear water shower on tower top
Under spray, circulating cleaning solution is to flow to the liquid at the bottom of tower after clear water sprays, the circulating cleaning solution spray in the middle part of clear water scrubbing tower
Pipe sprays；Device used by this method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases includes urgency
Cold scrubbing tower (1), clear water scrubbing tower (2), the first circulating pump (17), the second circulating pump (25) and discharging regulation valve (15)；
Incineration flue gas import (18) is arranged at the top of chilling scrubbing tower (1), chilling cleaning solution spray head (11) on chilling scrubbing tower top
Import be connected with the outlet of the second circulating pump (25), going out of the import of the second circulating pump and clear water scrubbing tower (2) bottom
Liquid mouth is connected, the import of the circulating cleaning solution shower (12) at chilling scrubbing tower (1) middle part and the first circulating pump (17)
Outlet be connected, the liquid outlet of the import of the first circulating pump and chilling scrubbing tower (1) bottom is connected, and discharging regulates valve (15)
Import be connected with the outlet of the first circulating pump (17)；Residue exhanst gas outlet (26) is arranged at the top of clear water scrubbing tower (2),
The import of the clear water shower (21) on clear water scrubbing tower top is clear water import, the circulating cleaning solution in the middle part of clear water scrubbing tower
The import of shower (22) is connected with the outlet of the second circulating pump (25)；The middle and lower part of chilling scrubbing tower (1) has one
Exhanst gas outlet (19), there is a gas approach (27) middle and lower part of clear water scrubbing tower (2), and the flue gas of chilling scrubbing tower goes out
Mouth (19) is connected with pipeline with the gas approach (27) of clear water scrubbing tower.
2. the method reclaiming phosphorus pentoxide as claimed in claim 1 from three formicester liquid waste incinerator discharge flue gases, its
The device being characterised by used also includes chilling scrubbing tower fluid level controller (14), feed liquor regulation valve (13), clear water washing
Tower fluid level controller (24), clear water regulating valve (23) and acidity detection device (16)；Chilling scrubbing tower fluid level controller
(14) being installed in the bottom of chilling scrubbing tower (1), feed liquor regulation valve (13) is installed in chilling cleaning solution spray head (11)
Import on, the signal of the signal output part of chilling scrubbing tower fluid level controller (14) and feed liquor regulation valve (13) controls
End is connected；Clear water regulating valve (23) is installed in the import of clear water shower (21), clear water scrubbing tower fluid level controller
(24) being installed in the bottom of clear water scrubbing tower (2), the signal output part of clear water scrubbing tower fluid level controller (24) is with clear
The signal of water regulating valve (23) controls end and is connected；Acidity detection device (16) is installed in the bottom of chilling scrubbing tower (1),
The signal output part of acidity detection device (16) controls end with the signal of described discharging regulation valve (15) and is connected；Clear water
The level-control signal that the clear water inflow of scrubbing tower (2) is sent by clear water scrubbing tower fluid level controller (24) passes through clear water
Governor valve control, the liquid level that the chilling liquid input of chilling scrubbing tower (1) is sent by chilling scrubbing tower fluid level controller (14)
Control signal passes through chilling scrubbing tower feed liquor governor valve control, and the phosphoric acid liquid concentration of chilling scrubbing tower output is by acidity detection dress
The detection control signal that putting (16) provides controls the aperture size of phosphoric acid liquid discharging regulation valve and realizes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510232197.6A CN104828794B (en) | 2015-05-08 | 2015-05-08 | The method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510232197.6A CN104828794B (en) | 2015-05-08 | 2015-05-08 | The method reclaiming phosphorus pentoxide from three formicester liquid waste incinerator discharge flue gases |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205952A (en) * | 2011-04-12 | 2011-10-05 | 郴州市金龙铁合金有限公司 | Process for recovering phosphoric acid in flue gas generated in process of smelting ferro phosphorus in electric furnace |
| CN203155067U (en) * | 2012-10-26 | 2013-08-28 | 中国石油化工股份有限公司 | An oxidation alkaline wash deep purification system for yellow phosphorus exhaust |
| CN203699916U (en) * | 2013-12-24 | 2014-07-09 | 贵州开磷（集团）有限责任公司 | Phosphorus-containing tail gas washing and recycling device for yellow phosphorus production |
| CN104211035A (en) * | 2013-06-04 | 2014-12-17 | 四川玖长科技有限公司 | Method for hydration absorption of phosphorus and recovery of fluorine from flue gas discharged from kiln of kiln-method phosphoric acid technology |
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2015
- 2015-05-08 CN CN201510232197.6A patent/CN104828794B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205952A (en) * | 2011-04-12 | 2011-10-05 | 郴州市金龙铁合金有限公司 | Process for recovering phosphoric acid in flue gas generated in process of smelting ferro phosphorus in electric furnace |
| CN203155067U (en) * | 2012-10-26 | 2013-08-28 | 中国石油化工股份有限公司 | An oxidation alkaline wash deep purification system for yellow phosphorus exhaust |
| CN104211035A (en) * | 2013-06-04 | 2014-12-17 | 四川玖长科技有限公司 | Method for hydration absorption of phosphorus and recovery of fluorine from flue gas discharged from kiln of kiln-method phosphoric acid technology |
| CN203699916U (en) * | 2013-12-24 | 2014-07-09 | 贵州开磷（集团）有限责任公司 | Phosphorus-containing tail gas washing and recycling device for yellow phosphorus production |
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