CN110075669A - A kind of purification treatment of nonferrous smelting HCl exhaust gas and recycle technique - Google Patents
A kind of purification treatment of nonferrous smelting HCl exhaust gas and recycle technique Download PDFInfo
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- CN110075669A CN110075669A CN201910456622.8A CN201910456622A CN110075669A CN 110075669 A CN110075669 A CN 110075669A CN 201910456622 A CN201910456622 A CN 201910456622A CN 110075669 A CN110075669 A CN 110075669A
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- exhaust gas
- hcl
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- absorbing liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
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- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of purification treatment of nonferrous smelting HCl exhaust gas and recycle technique, including obtaining waste water, cyclic absorption, tail gas emptying, spray washing exhaust gas, absorbing liquid and HCl are recycled, the present invention generates various wastewater and usually contains calcium, iron, the chloride of the metals such as manganese, the value that they are recycled is little, it deals with highly difficult, it is used to absorb HCl exhaust gas, it is typical treatment of wastes with processes of wastes against one another case, receive good effect, the present invention generates the waste that various wastewater originally carrys out not utility value, become calcic by absorbing HCl exhaust gas, iron, 15% or so hydrochloric acid of the metals such as manganese, it can be used to neutralize tungsten slag, being successfully realized turns waste into wealth, calcic, iron, the hydrochloric acid return of manganese improves calcium in tungsten slag acid decomposition liquid, iron, the concentration of the metals such as manganese, for returning for subsequent valuable metal Receipts create advantage, realize whole process closing using technique for tungsten slag for comprehensive, realize that pollution-free technique of zero discharge is laid a good foundation.
Description
Technical field
The present invention relates to environmental protection and resource regeneration technical field, specially a kind of purifications of nonferrous smelting HCl exhaust gas
Administer and recycle technique.
Background technique
Metallurgy, chemical company's exhaust gas of the discharge containing HCl are very universal phenomenons, thereby result in acid rain, serious to pollute
Atmosphere is also well known fact, so people did not also stop its improvement a moment, exploration can effectively administer and
The method of economical rationality is our target, and in hazardous waste-tungsten slag synthetical recovery project, hydrochloric acid decomposition is main work
Sequence, decomposes tungsten slag with more than 200 tons of concentrated hydrochloric acids daily at high temperature, and the HCl of daily more than 10 sour decomposer discharges is about suitable
In 10 tons of concentrated hydrochloric acids, therefore serious harm is caused to environment, it is each in order to administer metallurgy, the HCl exhaust gas of chemical company's discharge
The absorption tower of formula various kinds is come into being, but what absorption reagent generallyd use is water or alkaline aqueous solution, is produced after absorption new
Waste water, in other words exhaust emission is only transferred to contaminated wastewater by water or Alkali absorption, still need to handle it is up to standard could discharge, and
Processing cost is often very high, and it is necessary for designing a kind of purification treatment of nonferrous smelting HCl exhaust gas and recycling technique.
Summary of the invention
The purpose of the present invention is to provide a kind of purification treatment of nonferrous smelting HCl exhaust gas and technique is recycled, with solution
Certainly the problems mentioned above in the background art.
In order to solve the above technical problem, the present invention provides following technical solutions: a kind of purification of nonferrous smelting HCl exhaust gas
Technique, including step 1 are administered and recycled, waste water is obtained；Step 2, cyclic absorption；Step 3, tail gas emptying；Step
Four, spray washing exhaust gas；Step 5, absorbing liquid and HCl are recycled；
Wherein in the above step 1, slag WashPost is decomposed with the acid of tungsten slag recycling project and calcium chloride recycled diafiltration
Some waste water can all be generated by washing equal posies, be pumped into the of three-level countercurrent absorber for them as the absorbent of HCl exhaust gas use
Three-level；
Wherein in above-mentioned steps two, the HCl exhaust gas that tungsten slag hydrochloric acid decomposer is generated is sent into the first order with air-introduced machine and is inhaled
Tower is received, enters back into third pole through the second level, operation is absorbed and is carried out continuously, the absorbing liquid on absorption towers at different levels is pushed continuous with pump
Cyclic absorption；
Wherein in above-mentioned steps three, for exhaust gas after the absorption of three-level circulated in countercurrent, tail gas passes through 30 from the discharge of third pole
Rice chimney emptying；
Wherein in above-mentioned steps four, absorbent is discharged after spray washing exhaust gas three times from the first order, this absorbing liquid
CaCl2, FeCl3 concentration remain unchanged, HCl concentration increases to 100~150g/l；
Wherein in above-mentioned steps five, before the absorbing liquid that upper step 4 is obtained decomposes tungsten slag process back to acid, use
In neutralizing tungsten slag, utilize HCl therein again.
According to the above technical scheme, in the step 1, the main component for generating waste water is CaCl232~50g/l,
FeCl320~30g/l, pH are 3 or so.
According to the above technical scheme, in the step 3, tail gas HCl concentration is less than 100mg/m3, can't smell smell.
According to the above technical scheme, in the step 1, after obtaining waste water, using sieve by waste water filtering.
According to the above technical scheme, right before carrying out absorbing liquid and decomposing tungsten slag process back to acid in the step 5
Absorbing liquid is filtered.
According to the above technical scheme, the entire technique of the recycling carries out in the space of an opposing seal.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the present invention generate various wastewater usually contain calcium,
The chloride of the metals such as iron, manganese, the value that they are recycled is little, deals with the highly difficult present invention and is used to absorb
HCl exhaust gas is typical treatment of wastes with processes of wastes against one another case, receives good effect, and the present invention generates various wastewater and originally do not utilize
The waste of value becomes 15% or so hydrochloric acid of the metals such as calcic, iron, manganese by absorbing HCl exhaust gas, can be used to neutralize
Tungsten slag, being successfully realized turns waste into wealth, and the hydrochloric acid return of calcic, iron, manganese improves the gold such as calcium, iron, manganese in tungsten slag acid decomposition liquid
The concentration of category creates advantage for the recycling of subsequent valuable metal, and the present invention is that tungsten slag for comprehensive utilizes the full stream of technique realization
Journey closing realizes that pollution-free technique of zero discharge is laid a good foundation.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is process flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of purification treatment of nonferrous smelting HCl exhaust gas and recycling
Using technique, including step 1, waste water is obtained；Step 2, cyclic absorption；Step 3, tail gas emptying；Step 4, spray washing
Exhaust gas；Step 5, absorbing liquid and HCl are recycled；
Wherein in the above step 1, slag WashPost is decomposed with the acid of tungsten slag recycling project and calcium chloride recycled diafiltration
Some waste water can all be generated by washing equal posies, be pumped into the of three-level countercurrent absorber for them as the absorbent of HCl exhaust gas use
Three-level；
Wherein in above-mentioned steps two, the HCl exhaust gas that tungsten slag hydrochloric acid decomposer is generated is sent into the first order with air-introduced machine and is inhaled
Tower is received, enters back into third pole through the second level, operation is absorbed and is carried out continuously, the absorbing liquid on absorption towers at different levels is pushed continuous with pump
Cyclic absorption；
Wherein in above-mentioned steps three, for exhaust gas after the absorption of three-level circulated in countercurrent, tail gas passes through 30 from the discharge of third pole
Rice chimney emptying；
Wherein in above-mentioned steps four, absorbent is discharged after spray washing exhaust gas three times from the first order, this absorbing liquid
CaCl2、FeCl3Concentration remain unchanged, HCl concentration increases to 100~150g/l；
Wherein in above-mentioned steps five, before the absorbing liquid that upper step 4 is obtained decomposes tungsten slag process back to acid, use
In neutralizing tungsten slag, utilize HCl therein again.
According to the above technical scheme, in step 1, the main component for generating waste water is CaCl232~50g/l, FeCl3 20
~30g/l, pH is 3 or so.
According to the above technical scheme, in step 3, tail gas HCl concentration is less than 100mg/m3, can't smell smell.
According to the above technical scheme, in step 1, after obtaining waste water, using sieve by waste water filtering.
According to the above technical scheme, in step 5, before carrying out absorbing liquid and decomposing tungsten slag process back to acid, to absorption
Liquid is filtered.
According to the above technical scheme, the entire technique of recycling carries out in the space of an opposing seal.
Based on above-mentioned, it is an advantage of the current invention that it is of the invention, slag WashPost and chlorine are decomposed with the acid of tungsten slag recycling project
Some waste water can all be generated by changing the posies such as calcium recycling filtration washing, and waste water usually contains the chloride of the metals such as calcium, iron, manganese, this
Invention is used to absorption HCl exhaust gas and receives good effect, inverse with three-level is pumped into using them as the absorbent of HCl exhaust gas
The third level for flowing absorption tower, the HCl exhaust gas that tungsten slag hydrochloric acid decomposer is generated is sent into first order absorption tower with air-introduced machine, through second
Grade enters back into third pole, absorbs operation and is carried out continuously, and the absorbing liquid on absorption towers at different levels pushes continuous cyclic absorption with pump, gives up
Gas is after the absorption of three-level circulated in countercurrent, and from the discharge of third pole by 30 meters of chimney emptyings, tail gas HCl concentration is less than tail gas
100mg/m3 can't smell smell, and absorbent is discharged after spray washing exhaust gas three times from the first order, the CaCl2 of this absorbing liquid,
The concentration of FeCl3 remains unchanged, and HCl concentration increases to 100~150g/l, becomes calcic, iron, manganese by absorbing HCl exhaust gas
15% or so hydrochloric acid of equal metals can be used to neutralize tungsten slag, and being successfully realized turns waste into wealth.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. a kind of purification treatment of nonferrous smelting HCl exhaust gas and recycling technique, including step 1, obtain waste water；Step 2,
Cyclic absorption；Step 3, tail gas emptying；Step 4, spray washing exhaust gas；Step 5, absorbing liquid and HCl are recycled；Its feature
It is:
Wherein in the above step 1, slag WashPost and calcium chloride recycling filtration washing etc. are decomposed with the acid of tungsten slag recycling project
Post can all generate some waste water, they are used to the third level for being pumped into three-level countercurrent absorber as the absorbent of HCl exhaust gas；
Wherein in above-mentioned steps two, the HCl exhaust gas that tungsten slag hydrochloric acid decomposer is generated is sent into first order absorption tower with air-introduced machine,
Third pole is entered back into through the second level, operation is absorbed and is carried out continuously, the absorbing liquid on absorption towers at different levels pushes constantly circulation with pump
It absorbs；
Wherein in above-mentioned steps three, for exhaust gas after the absorption of three-level circulated in countercurrent, tail gas passes through 30 meters of cigarettes from the discharge of third pole
Cylinder emptying；
Wherein in above-mentioned steps four, absorbent is discharged after spray washing exhaust gas three times from the first order, this absorbing liquid
CaCl2、FeCl3Concentration remain unchanged, HCl concentration increases to 100~150g/l；
Wherein in above-mentioned steps five, before absorbing liquid that upper step 4 is obtained decomposes tungsten slag process back to acid, it is used for
With tungsten slag, utilize HCl therein again.
2. a kind of purification treatment of nonferrous smelting HCl exhaust gas according to claim 1 and recycling technique, feature exist
In: in the step 1, the main component for generating waste water is CaCl232~50g/l, FeCl320~30g/l, pH are 3 or so.
3. a kind of purification treatment of nonferrous smelting HCl exhaust gas according to claim 1 and recycling technique, feature exist
In: in the step 3, tail gas HCl concentration is less than 100mg/m3, can't smell smell.
4. a kind of purification treatment of nonferrous smelting HCl exhaust gas according to claim 1 and recycling technique, feature exist
In: in the step 1, after obtaining waste water, using sieve by waste water filtering.
5. a kind of purification treatment of nonferrous smelting HCl exhaust gas according to claim 3 and recycling technique, feature exist
In: in the step 5, before carrying out absorbing liquid and decomposing tungsten slag process back to acid, absorbing liquid is filtered.
6. a kind of purification treatment of nonferrous smelting HCl exhaust gas according to claim 3 and recycling technique, feature exist
In: the entire technique of the recycling carries out in the space of an opposing seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910456622.8A CN110075669A (en) | 2019-05-29 | 2019-05-29 | A kind of purification treatment of nonferrous smelting HCl exhaust gas and recycle technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910456622.8A CN110075669A (en) | 2019-05-29 | 2019-05-29 | A kind of purification treatment of nonferrous smelting HCl exhaust gas and recycle technique |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242322A (en) * | 1987-03-31 | 1988-10-07 | Takuma Co Ltd | Method for scrubbing exhaust gas |
| CN101569823A (en) * | 2009-05-27 | 2009-11-04 | 无锡市星亿涂装环保设备有限公司 | Method for recycling hydrochloric acid pickling waste gas |
| CN101648104A (en) * | 2008-08-13 | 2010-02-17 | 北京格瑞华阳科技发展有限公司 | Technology for reclaiming hydrogen chloride tail gas in chemical production |
| CN101723327A (en) * | 2009-12-01 | 2010-06-09 | 张再明 | Hydrochloric acid absorption tower and process for producing hydrochloric acid for production |
| CN102059053A (en) * | 2010-11-19 | 2011-05-18 | 山东阳谷华泰化工股份有限公司 | Process for absorbing tail gas in process for preparing chlorocyclohexane by cyclohexane method by high-salt wastewater |
| CN202105563U (en) * | 2011-04-29 | 2012-01-11 | 苏州市吴赣药业有限公司 | Hydrogen chloride gas circulatory recovery system |
| CN105435589A (en) * | 2015-11-12 | 2016-03-30 | 中国石油化工股份有限公司 | Hydrochloric acid recovery system and method for ship-loading operation |
| CN107961645A (en) * | 2016-10-19 | 2018-04-27 | 中国石油化工股份有限公司 | A kind of processing method of chloride tail gas |
-
2019
- 2019-05-29 CN CN201910456622.8A patent/CN110075669A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242322A (en) * | 1987-03-31 | 1988-10-07 | Takuma Co Ltd | Method for scrubbing exhaust gas |
| CN101648104A (en) * | 2008-08-13 | 2010-02-17 | 北京格瑞华阳科技发展有限公司 | Technology for reclaiming hydrogen chloride tail gas in chemical production |
| CN101569823A (en) * | 2009-05-27 | 2009-11-04 | 无锡市星亿涂装环保设备有限公司 | Method for recycling hydrochloric acid pickling waste gas |
| CN101723327A (en) * | 2009-12-01 | 2010-06-09 | 张再明 | Hydrochloric acid absorption tower and process for producing hydrochloric acid for production |
| CN102059053A (en) * | 2010-11-19 | 2011-05-18 | 山东阳谷华泰化工股份有限公司 | Process for absorbing tail gas in process for preparing chlorocyclohexane by cyclohexane method by high-salt wastewater |
| CN202105563U (en) * | 2011-04-29 | 2012-01-11 | 苏州市吴赣药业有限公司 | Hydrogen chloride gas circulatory recovery system |
| CN105435589A (en) * | 2015-11-12 | 2016-03-30 | 中国石油化工股份有限公司 | Hydrochloric acid recovery system and method for ship-loading operation |
| CN107961645A (en) * | 2016-10-19 | 2018-04-27 | 中国石油化工股份有限公司 | A kind of processing method of chloride tail gas |
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Application publication date: 20190802 |