CN101219774A - Four-column waste acid regenerating system and technique - Google Patents
Four-column waste acid regenerating system and technique Download PDFInfo
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- CN101219774A CN101219774A CNA2008100451886A CN200810045188A CN101219774A CN 101219774 A CN101219774 A CN 101219774A CN A2008100451886 A CNA2008100451886 A CN A2008100451886A CN 200810045188 A CN200810045188 A CN 200810045188A CN 101219774 A CN101219774 A CN 101219774A
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- absorption tower
- separator
- acid
- stoving oven
- gas
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Abstract
The invention discloses a regeneration system of waste acid in four towers, characterized in that (1) a waste acid filter, a roasting oven, an oxidizing iron cabin, a cyclone separator, a venturi separator, an absorption tower I, an absorption tower II, an absorption tower III, and a waste gas srubber are included; (2) the waste acid filter is connected with the venturi separator and the roasting oven through tubes; the oxidizing iron cabin is connected with a bottom of the roasting oven; the cyclone separator is connected with an air outlet of the roasting oven and an air inlet of the venturi separator; the adsorption tower I is connected with the venturi separator and the adsorption tower II which is connected with the adsorption tower III; the waste gas scrubber is connected with the adsorption tower III through a negative-pressure air fan and a separator. The system solves the problems of complex structure of the device, difficult technical process controlling and instable quality of iron powders in the acid regeneration project, reduces construction cost and period of the project, facilitates safe production, and improvers production efficiency.
Description
Technical field
The present invention relates to the acid regeneration technical field, be specifically related to a kind of four-column waste acid regenerating system and technology.
Background technology
It is effective and feasible spent acid treatment process that spray roasting acid regeneration device was proved to be in the Iron And Steel Industry scope in present stage.In cold-rolling pickling factory, when using acid pickling steel plate with hydrochloric acid, the ferric oxide of plate surface is washed off by hydrochloric acid and is formed iron protochloride or iron(ic) chloride is dissolved in the pickle solution, along with the iron concentration that carries out in the pickle solution of acid cleaning process can raise and the corresponding reduction of concentration of free HCL.For the iron ion that keeps the concentration of the free HCL in the pickling acid solution, remove increasing in the acid solution, the quantitative acid regeneration device regeneration free acid that is sent to of spent acid solution is returned the pickling unit, obtain brown iron oxide simultaneously.In the prior art, this class apparatus structure complexity, working efficiency is lower.
A kind of regeneration of hydrochloric acid device is disclosed as Chinese patent 200620004583, comprise stoving oven, preconcentrator, absorption tower, washing tower, titanium blower fan and brown iron oxide storehouse, the stoving oven bottom is provided with brown iron oxide outlet and bleeder valve, and this outlet is connected with the brown iron oxide storehouse; The pneumatic outlet of described stoving oven is connected with the gas inlet of preconcentrator, and the pneumatic outlet of this preconcentrator connects titanium blower fan, absorption tower and washing tower successively; Also be provided with the outlet of hydrochloric acid inlet and concentrating hydrochloric acid at the two ends of described preconcentrator, the latter is connected with the hydrochloric acid inlet of described stoving oven.This device has been realized the regeneration of abraum salt acid, can make that pickling exhausted waste hydrochloric acid regeneration recycles in the industry, has significantly reduced the pollution to environment, reduced production cost, but its structure is not quite reasonable, and technical process is difficult to control, and correlation technique all needs to improve.
Summary of the invention
Technical problem to be solved by this invention is how a kind of four-column waste acid regenerating system and technology are provided, this system has solved that device structure complexity, technical process are difficult to problems such as control, iron powder quality instability in the acid regeneration engineering, the construction cost and the cycle of engineering have been reduced, production safety improves productivity effect.
First technical problem proposed by the invention is to solve like this: a kind of four-column waste acid regenerating system is provided, it is characterized in that:
1. comprise waste acid filter, stoving oven, ferric oxide storehouse, cyclonic separator, Venturi separator, absorption tower I, absorption tower II, absorption tower III and exhaust gas washing tower;
2. described waste acid filter is by pipe connection Venturi separator and stoving oven, described ferric oxide storehouse connects the bottom of stoving oven, institute's cyclonic separator connects the air outlet of stoving oven and the inlet mouth of Venturi separator, described absorption tower I connects the Venturi separator, described absorption tower II connects absorption tower I, described absorption tower III connects absorption tower II, and described exhaust gas washing tower is connected absorption tower III by negative-pressure air fan with separator.
According to four-column waste acid regenerating system provided by the present invention, it is characterized in that, described stoving oven is a box hat, be lined with refractory brick in it, and be tangent line at circumferential direction and be arranged in three burners heating on the box hat, be provided with nozzle at its top, described nozzle is installed on three spray guns, and spray gun can automatically be inserted in the top of stoving oven
According to four-column waste acid regenerating system provided by the present invention, it is characterized in that, be provided with strainer in the nozzle front of spray gun inside, to prevent spray nozzle clogging.
According to four-column waste acid regenerating system provided by the present invention, it is characterized in that described stoving oven bottom is equipped with rotary valve, an oxide blocks crusher is installed on the top of rotary valve.
According to four-column waste acid regenerating system provided by the present invention, it is characterized in that the top of described absorption tower I and absorption tower II is provided with the nozzle divider.
According to four-column waste acid regenerating system provided by the present invention, it is characterized in that, be provided with the pneumatic operation valve between described waste acid filter and the Venturi separator, automatically control Venturi separator liquid level by this pneumavalve.
A kind of four-column waste acid reclaiming process is characterized in that, may further comprise the steps:
1. clean spent acid is delivered to waste acid filter, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution;
2. the spent acid in the above-mentioned steps is entered the Venturi separator by the pneumatic operation valve, this pneumatic operation valve is controlled the liquid level in the Venturi separator automatically;
3. the spent acid solution after will concentrating through the Venturi separator is delivered to the nozzle of stoving oven by feeding pump with the fixed flow, carries out calcination in stoving oven;
4. waste liquid produces chemical reaction in stoving oven, produces solid particulate Fe
2O
3With stoving oven gas, stoving oven gas is made of water vapor, hydrogenchloride and combustion exhaust, described solid particulate Fe
2O
3Emit by rotary valve, described stoving oven gas enters cyclonic separator from the top of stoving oven, the Fe that described cyclonic separator will contain
2O
3Dust separation is come out;
5. will lead into Venturi separator through the gas of cyclonic separator, it is directly contacted with the circulation acid solution, be recycled acid solution cooling and clean after enter absorption tower I;
6. the nozzle divider branch of rinse water by I top, absorption tower is sprinkled upon on the filler among the I of absorption tower, absorbing hydrogen chloride gas forms regenerating acid, and regenerating acid flows to the regenerating acid storage tanks from the bottom of absorption tower I;
7. will introduce absorption tower II through the gas of absorption tower I, the nozzle divider of spent acid by II top, absorption tower sprayed on gas, absorbing hydrogen chloride gas, and the spent acid introducing waste acid filter or the Venturi strainer of absorption tower II bottom;
8. will introduce absorption tower III through the gas of absorption tower II, the structure of described absorption tower III is identical with absorption tower I, enters exhaust gas washing tower by negative-pressure air fan and air water separator and handles waste gas emptying after treatment.
According to four-column waste acid reclaiming process provided by the present invention, it is characterized in that, step 4. in cyclonic separator separate Fe
2O
3Dust discharges by a rotary valve, and turns back in the stoving oven.
According to four-column waste acid reclaiming process provided by the present invention, it is characterized in that described negative-pressure air fan makes total system be in negative pressure state, prevent the hydrogenchloride leakage.
According to four-column waste acid reclaiming process provided by the present invention, it is characterized in that, at the bottom of described exhaust gas washing tower rinse water circulation cleaning waste gas, at the top of washing tower spray deionized water wash waste gas.
Four-column waste acid regenerating system provided by the present invention, simple and reasonable, the major industry process parameter, it is temperature, pressure and flow are all shown by numeral in the watch-keeping cubicle, and important performance perameter is all automatically controlled by the PLC system automatically, the startup of equipment, and control and parking all can be finished by keyboard.Warning and capability error are all by record in the p.m.entry of independently reporting to the police, and therefore, operator are easy to monitoring device operational stage from the watch-keeping cubicle, and provide class's report by printer.The design of the instrument of reclaim equiment makes simplified control, simultaneously can guarantee operational safety, and interlocking system can prevent in equipment failure or not expect technical failure, as shortcomings such as heating medium, power supplys, even when not having operator, the structure deteriorate that is caused.Just in case emergency episode occurs, regenerating unit can quit work automatically.The startup and the shut-down operation of this device all are easy to, and can carry out at any time, and during starting outfit, with the burner heating, water operation then is until reaching correct flow, temperature and pressure.Then, the water supply is switched to the acid supply, regeneration can begin.For the arrestment operation, then block the supply of acid earlier, equipment automatically switches to the water operation, and after for some time, regenerating unit just stops fully.
Description of drawings
Fig. 1 is the four-column waste acid regenerating system structure iron.
Embodiment
Below in conjunction with accompanying drawing and the present invention is further described.
The spent pickle liquor that comes from the pickling unit is collected in the spent acid jar, and the storage power of this jar allows regenerating unit to be independent of the work of pickling unit.With pump waste acid filter is delivered in the acid in the acid storage tank, in strainer, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution, and spent acid enters pre-desiliconization unit (seeing pre-desiliconization unit technology description) by a pneumatic operation valve.Spent acid solution after pre-desiliconization purifies is collected and is blended in the purification spent acid jar of tank field.Spent acid after the pre-desiliconization enters the Venturi separator by a pneumatic operation valve, automatically controls Venturi separator liquid level by this pneumavalve.Acid solution flows to the Venturi recycle pump with specified amount from the Venturi separator.Because flowing to the spent acid amount of roasting is constant.Thereby the spent acid amount that flows to the Venturi separator also is a constant.Spent acid is circulated by Venturi, and the direct heat exchange of thermal bake-out gas with from stoving oven evaporates partially liq.The spent acid solution that pre-concentration is crossed is delivered to the nozzle of stoving oven after concentrating waste acid filter filters with the flow of a control by the stoving oven feeding pump.These nozzles are installed on 3 spray guns, and spray gun can automatically be inserted in the top of stoving oven.These nozzles are by exotic materials manufacturing (sintered material Al
2O
3).In the nozzle front of spray gun inside a strainer is arranged, to prevent spray nozzle clogging.
Stoving oven is a box hat, is lined with refractory brick in it, directly is used in circumferential direction and is tangent line and is arranged in three burners heating on the box hat.Combustion gases form certain liquid form in stoving oven inside, thereby dry the pre-concentration acid droplet from nozzle, and in the thermal region of stoving oven (300～800 ℃), FeCL
2And FeCL
3Decompose according to following equation:
2FeCL
2+2H2O+1/2O
2＝Fe
2O
3+4HCL
2FeCL
3+3H
2O＝Fe
2O
3+6HCL
Solid particulate (Fe
2O
3) drop in the stoving oven lower taper body with form of powder, and emit with a rotary valve.Rotary valve can make the stoving oven gas inside keep apart with extraneous gas.On the top of rotary valve an oxide blocks crusher has been installed, has been used for broken any agglomerate that can fall from the roasting furnace wall.
Stoving oven gas is by combustion exhaust, and water vapor and hydrogen chloride gas are formed, leave stoving oven from the top of stoving oven and by the cyclonic separator group with contained Fe
2O
3The dust major part is separated.Isolated oxide compound discharges by rotary valve, and turns back to stoving oven.Roasting gas enters Venturi then, and in Venturi, high-temperature gas directly contacts with recycle acid, and be cooled and purge gas in only residual a spot of oxide compound, and enter the absorption tower.
For absorbing hydrogen chloride gas, use rinse water.Water is sent into from the top, absorption tower, in the absorption tower, the nozzle divider is arranged with on the filler of water distribution in the absorption tower.In counter-current process, the hydrogen chloride in gas composition is absorbed thereby forms regenerating acid.Regenerating acid leaves the absorption tower from the bottom, and flows to the regenerating acid storage tanks.
In order to protect exhaust gas fan and further absorbing hydrogen chloride gas, follow-up two absorption towers (absorption tower II and absorption tower III) that are provided with again of this flow process, at absorption tower II, the nozzle divider of spent acid by II top, absorption tower sprayed on gas, absorbing hydrogen chloride gas, and the spent acid introducing waste acid filter or the Venturi strainer of absorption tower II bottom; Use rinse water at absorption tower III, send into from the absorption tower top of tower, in the absorption tower, the nozzle divider is arranged with on the filler of water distribution in the absorption tower, in counter-current process, the micro-hydrogenchloride composition in the gas is absorbed.
The torrefaction waste gas that comes from absorption tower III enters exhaust gas fan, produces corrosion for preventing exhaust gas fan when shutting down, and rinse water is ejected on the blade of exhaust gas fan to clean, and this blower fan is also as washing unit.After the exhaust gas fan is a separator, here with gas and liquid separation, then enters the back Venturi, enters exhaust gas washing tower at last, at the bottom of exhaust gas washing tower rinse water circulation cleaning waste gas, at the top of washing tower spray deionized water wash waste gas.
Exhaust gas fan can be controlled automatically and make all equipment unit all be in slight negative pressure state, therefore, does not have any hydrogenchloride in the system and leaks out.
The oxide compound that stoving oven is produced carries (working under slight negative pressure state to prevent that dust from leaking in the atmosphere) to the oxide compound feed bin by a pneumatic conveyor system.The exhausted air exhausted air in the atmosphere then when a sintered plate formula strainer was installed on the top of feed bin with cleaning conveying Fe2O3.In feed bin bottom, the Fe2O3 powder is discharged in the container of sack packer into a rotary valve.
Claims (10)
1. a four-column waste acid regenerating system is characterized in that: 1. comprise waste acid filter, stoving oven, ferric oxide storehouse, cyclonic separator, Venturi separator, absorption tower I, absorption tower II, absorption tower III and exhaust gas washing tower; 2. described waste acid filter is by pipe connection Venturi separator and stoving oven, described ferric oxide storehouse connects the bottom of stoving oven, institute's cyclonic separator connects the air outlet of stoving oven and the inlet mouth of Venturi separator, described absorption tower I connects the Venturi separator, described absorption tower II connects absorption tower I, described absorption tower III connects absorption tower II, and described exhaust gas washing tower is connected absorption tower III by negative-pressure air fan with separator.
2. four-column waste acid regenerating system according to claim 1, it is characterized in that, described stoving oven is a box hat, be lined with refractory brick in it, and be tangent line at circumferential direction and be arranged in three burners heating on the box hat, be provided with nozzle at its top, described nozzle is installed on three spray guns, and spray gun can automatically be inserted in the top of stoving oven
3. four-column waste acid regenerating system according to claim 1 is characterized in that, is provided with strainer in the nozzle front of spray gun inside.
4. four-column waste acid regenerating system according to claim 1 is characterized in that, described stoving oven bottom is equipped with rotary valve, and an oxide blocks crusher is installed on the top of rotary valve.
5. four-column waste acid regenerating system according to claim 1 is characterized in that, the top of described absorption tower I, absorption tower II, absorption tower III is provided with the nozzle divider.
6. four-column waste acid regenerating system according to claim 1 is characterized in that, is provided with the pneumatic operation valve between described waste acid filter and the Venturi separator, automatically controls Venturi separator liquid level by this pneumavalve.
7. a four-column waste acid reclaiming process is characterized in that, may further comprise the steps:
1. clean spent acid is delivered to waste acid filter, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution;
2. the spent acid in the above-mentioned steps is entered the Venturi separator by the pneumatic operation valve, this pneumatic operation valve is controlled the liquid level in the Venturi separator automatically;
3. the spent acid solution after will concentrating through the Venturi separator is delivered to the nozzle of stoving oven by feeding pump with the fixed flow, carries out calcination in stoving oven;
4. waste liquid produces chemical reaction in stoving oven, produces solid particulate Fe
2O
3With stoving oven gas, stoving oven gas is made of water vapor, hydrogenchloride and combustion exhaust, described solid particulate Fe
2O
3Emit by rotary valve, described stoving oven gas enters cyclonic separator from the top of stoving oven, the Fe that described cyclonic separator will contain
2O
3Dust separation is come out;
5. will lead into Venturi separator through the gas of cyclonic separator, it is directly contacted with the circulation acid solution, be recycled acid solution cooling and clean after enter absorption tower I;
6. the nozzle divider branch of rinse water by I top, absorption tower is sprinkled upon on the filler among the I of absorption tower, absorbing hydrogen chloride gas forms regenerating acid, and regenerating acid flows to the regenerating acid storage tanks from the bottom of absorption tower I;
7. will introduce absorption tower II through the gas of absorption tower I, the nozzle divider of spent acid by II top, absorption tower sprayed on gas, absorbing hydrogen chloride gas, and the spent acid introducing waste acid filter or the Venturi strainer of absorption tower II bottom;
8. will introduce absorption tower III through the gas of absorption tower II, the structure of described absorption tower III is identical with absorption tower I, enters exhaust gas washing tower by negative-pressure air fan and air water separator and handles waste gas emptying after treatment.
8. four-column waste acid reclaiming process according to claim 7 is characterized in that, step 4. in cyclonic separator separate Fe
2O
3Dust discharges by a rotary valve, and turns back in the stoving oven.
9. four-column waste acid reclaiming process according to claim 7 is characterized in that described negative-pressure air fan makes total system be in negative pressure state, prevents the hydrogenchloride leakage.
10. four-column waste acid reclaiming process according to claim 7 is characterized in that, at the bottom of described exhaust gas washing tower rinse water circulation cleaning waste gas, at the top of washing tower spray deionized water wash waste gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100451886A CN101219774B (en) | 2008-01-15 | 2008-01-15 | Four-column waste acid regenerating system and technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100451886A CN101219774B (en) | 2008-01-15 | 2008-01-15 | Four-column waste acid regenerating system and technique |
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| Publication Number | Publication Date |
|---|---|
| CN101219774A true CN101219774A (en) | 2008-07-16 |
| CN101219774B CN101219774B (en) | 2011-02-02 |
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|---|---|---|---|
| CN2008100451886A Expired - Fee Related CN101219774B (en) | 2008-01-15 | 2008-01-15 | Four-column waste acid regenerating system and technique |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773045A (en) * | 2012-06-29 | 2012-11-14 | 常州环生科创石墨设备有限公司 | Spray roasting device |
| CN102992272A (en) * | 2012-10-17 | 2013-03-27 | 朱一凡 | Oxidizing reaction equipment |
| CN103319038A (en) * | 2012-03-23 | 2013-09-25 | 山西太钢不锈钢股份有限公司 | Processing method for waste mixed acid |
| CN107311287A (en) * | 2017-09-02 | 2017-11-03 | 河北天创管业有限公司 | A kind of method for treating waste liquid and device based on acid regeneration process |
| CN109569205A (en) * | 2018-12-26 | 2019-04-05 | 中冶南方工程技术有限公司 | Acid regeneration flue gas processing method and system |
| CN110124463A (en) * | 2019-06-11 | 2019-08-16 | 湖北瑞力源环保科技有限公司 | A kind of exhaust gas purification system and technique for spray roasting hydrochloric acid regenerating device |
| CN110160063B (en) * | 2018-02-11 | 2020-12-08 | 阮氏化工（常熟）有限公司 | Combustion treatment process for mixed waste acid containing organic matters and heavy metals |
| CN114314976A (en) * | 2021-11-17 | 2022-04-12 | 江苏新裕泰华环保集团有限公司 | Recovery treatment equipment for treating acidic industrial wastewater and use method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU501823B2 (en) * | 1975-03-14 | 1979-06-28 | Solex Research Corporation Of Japan | Removing heavy metals froman acid waste liquid |
| AT403698B (en) * | 1995-11-27 | 1998-04-27 | Andritz Patentverwaltung | METHOD FOR RECOVERY OR RECOVERY OF ACIDS FROM METAL SOLUTIONS OF THESE ACIDS |
| US6692719B1 (en) * | 2000-11-08 | 2004-02-17 | Hatch Ltd. | Process for regeneration of acid halide solutions |
| CN2880793Y (en) * | 2006-03-14 | 2007-03-21 | 鞍山瑞野实业有限公司 | Hydrochloric acid regenerating device |
| CN1851320B (en) * | 2006-04-28 | 2010-05-12 | 中冶南方工程技术有限公司 | Hydrochloride waste regenerating process for spray roasting |
-
2008
- 2008-01-15 CN CN2008100451886A patent/CN101219774B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319038A (en) * | 2012-03-23 | 2013-09-25 | 山西太钢不锈钢股份有限公司 | Processing method for waste mixed acid |
| CN102773045A (en) * | 2012-06-29 | 2012-11-14 | 常州环生科创石墨设备有限公司 | Spray roasting device |
| CN102992272A (en) * | 2012-10-17 | 2013-03-27 | 朱一凡 | Oxidizing reaction equipment |
| CN107311287A (en) * | 2017-09-02 | 2017-11-03 | 河北天创管业有限公司 | A kind of method for treating waste liquid and device based on acid regeneration process |
| CN110160063B (en) * | 2018-02-11 | 2020-12-08 | 阮氏化工（常熟）有限公司 | Combustion treatment process for mixed waste acid containing organic matters and heavy metals |
| CN109569205A (en) * | 2018-12-26 | 2019-04-05 | 中冶南方工程技术有限公司 | Acid regeneration flue gas processing method and system |
| CN110124463A (en) * | 2019-06-11 | 2019-08-16 | 湖北瑞力源环保科技有限公司 | A kind of exhaust gas purification system and technique for spray roasting hydrochloric acid regenerating device |
| CN114314976A (en) * | 2021-11-17 | 2022-04-12 | 江苏新裕泰华环保集团有限公司 | Recovery treatment equipment for treating acidic industrial wastewater and use method thereof |
| CN114314976B (en) * | 2021-11-17 | 2022-09-16 | 江苏新裕泰华环保集团有限公司 | Recovery treatment equipment for treating acidic industrial wastewater and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN101219774B (en) | 2011-02-02 |
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Assignee: Chengdu Stirk Environmental Protection Engineering Technology Co.,Ltd. Assignor: CHENGDU ASITEKE GUOLONG ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. Contract record no.: 2012510000001 Denomination of invention: Four-column waste acid regenerating system and technique Granted publication date: 20110202 License type: Exclusive License Open date: 20080716 Record date: 20120105 |
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