CN101214924B - Regenerating system and technique for three-tower waste aid - Google Patents

Regenerating system and technique for three-tower waste aid Download PDF

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Publication number
CN101214924B
CN101214924B CN2008100451871A CN200810045187A CN101214924B CN 101214924 B CN101214924 B CN 101214924B CN 2008100451871 A CN2008100451871 A CN 2008100451871A CN 200810045187 A CN200810045187 A CN 200810045187A CN 101214924 B CN101214924 B CN 101214924B
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China
Prior art keywords
absorption tower
separator
stoving oven
tower
gas
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CN2008100451871A
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Chinese (zh)
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CN101214924A (en
Inventor
龙国平
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成都阿斯特克国龙环保工程有限公司
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Publication of CN101214924A publication Critical patent/CN101214924A/en
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Abstract

The invention discloses a three-tower waste acid regeneration system which is characterized in that: (1)the system includes a waste acid filter, a roaster, an iron oxide cabin, a cyclone separator, a Venturi separator, an absorption tower I, an absorption tower II and a waste gas scrubber; (2)the waste acid filter is connected with the Venturi separator and the roaster by pipelines; the iron oxide cabin is connected with the bottom end of the roaster; the cyclone separator is connected with the gas outlet of the roaster and the gas inlet of the Venturi separator; the absorption tower I is connected with the Venturi separator; the absorption tower II is connected with the absorption tower I; the waste gas scrubber is connected with the absorption tower II by a negative pressure fan and a separator. The system solves the problems of complicated equipment structure, uncontrollable technical process, unstable quality of iron power, etc., in acid regeneration engineering, reduces the construction cost and the construction cycle of the engineering, realizes safety production and improves the production benefits.

Description

Three-tower waste aid regeneration system rapidly and technology
Technical field
The present invention relates to the acid regeneration technical field, be specifically related to a kind of three-tower waste aid regeneration system rapidly and technology.
Background technology
It is effective and feasible spent acid treatment process that spray roasting calculation regenerating unit 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 three-tower waste aid regeneration system rapidly 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 three-tower waste aid regeneration system rapidly 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 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, and described exhaust gas washing tower is connected absorption tower II by negative-pressure air fan with separator.
According to three-tower waste aid regeneration system rapidly 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 three-tower waste aid regeneration system rapidly 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 three-tower waste aid regeneration system rapidly 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 three-tower waste aid regeneration system rapidly 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 three-tower waste aid regeneration system rapidly 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 three-tower waste aid 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 flavor 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, and carry out secondary and absorb;
8. will enter exhaust gas washing tower by negative-pressure air fan and air water separator through the gas of absorption tower II and handle waste gas emptying after treatment.
According to three-tower waste aid 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 three-tower waste aid 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 three-tower waste aid 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.
Three-tower waste aid regeneration system rapidly 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 a three-tower waste aid regeneration system rapidly 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.
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, this flow process is provided with the 2# absorption tower, and uses rinse water, and rinse water are sent into from the washing tower top, in the absorption tower, the nozzle divider are 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 the 2# absorption tower 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 (2)

1. a three-tower waste aid regeneration system rapidly is characterized in that: 1. comprise waste acid filter, stoving oven, ferric oxide storehouse, cyclonic separator, Venturi separator, absorption tower I, absorption tower II 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, described 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, and described exhaust gas washing tower is connected absorption tower II by negative-pressure air fan with separator; 3. the top of described absorption tower I and absorption tower II is provided with the nozzle divider, by spraying rinse water absorbing hydrogen chloride gas; 4. 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, the stoving oven bottom is equipped with rotary valve, an oxide blocks crusher is installed on the top of rotary valve, top at stoving oven is provided with nozzle, described nozzle is installed on three spray guns, spray gun can automatically be inserted in the top of stoving oven, nozzle front in spray gun inside is provided with strainer, be provided with the pneumatic operation valve between described waste acid filter and the Venturi separator, automatically control Venturi separator liquid level by this pneumatic operation valve.
2. a three-tower waste aid 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. will enter the Venturi separator by the pneumatic operation valve through the spent acid that above-mentioned steps is handled, 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 vapour, 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, and described cyclonic separator will contain Fe 2O 3Dust separation is come out, and cyclonic separator is separated Fe 2O 3Dust discharges by a rotary valve, and turns back in the stoving oven;
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, and carry out secondary and absorb;
8. will enter exhaust gas washing tower by negative-pressure air fan and air water separator through the gas of absorption tower II handles, described negative-pressure air fan makes total system be in negative pressure state, prevent that hydrogenchloride from leaking, at the bottom of described exhaust gas washing tower rinse water circulation cleaning waste gas, in the top of washing tower spray deionized water wash waste gas, waste gas emptying after treatment.
CN2008100451871A 2008-01-15 2008-01-15 Regenerating system and technique for three-tower waste aid CN101214924B (en)

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CN101856591B (en) * 2010-06-24 2012-11-07 蓝星化工有限责任公司 TDI byproduct hydrochloric acid tail gas emergency destruction device and control method thereof
CN102674250A (en) * 2012-04-28 2012-09-19 佛山津西金兰冷轧板有限公司 Waste acid recovery and treatment device
CN102836630B (en) * 2012-09-28 2015-04-01 神华集团有限责任公司 Spray tower and roasting tail gas treatment system
CN103830960B (en) * 2014-01-15 2016-01-20 中冶南方工程技术有限公司 Acid purification system wastewater zero discharge system and technique thereof
CN104784945A (en) * 2014-01-16 2015-07-22 宝山钢铁股份有限公司 Halide concentration apparatus
CN106310755A (en) * 2016-08-15 2017-01-11 中冶南方工程技术有限公司 Acid regeneration system, cleaning system, acid regeneration method of acid regeneration system and cleaning method of cleaning system
CN106495231A (en) * 2016-09-08 2017-03-15 佛山津西金兰冷轧板有限公司 A kind of spent acid processes recovery technology
CN107574450B (en) * 2017-10-20 2020-07-24 鞍山创鑫环保科技股份有限公司 Stainless steel pickling waste liquid regeneration method and system
CN108483398A (en) * 2018-05-16 2018-09-04 攀钢集团西昌钢钒有限公司 A kind of acid regeneration roaster and its acid regeneration process
CN109987642A (en) * 2019-03-20 2019-07-09 湖南华菱涟钢薄板有限公司 A kind of process system producing frerrous chloride and process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166098A (en) * 1975-03-14 1979-08-28 Solex Research Corp. Of Japan Process for treating an acid waste liquid
CN1157797A (en) * 1995-11-27 1997-08-27 安德里茨-专利管理有限公司 Process and plant for extraction or recovery of acids from solutions these acids
CN2880793Y (en) * 2006-03-14 2007-03-21 鞍山瑞野实业有限公司 Hydrochloric acid regenerating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166098A (en) * 1975-03-14 1979-08-28 Solex Research Corp. Of Japan Process for treating an acid waste liquid
CN1157797A (en) * 1995-11-27 1997-08-27 安德里茨-专利管理有限公司 Process and plant for extraction or recovery of acids from solutions these acids
CN2880793Y (en) * 2006-03-14 2007-03-21 鞍山瑞野实业有限公司 Hydrochloric acid regenerating device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP昭63-295442A 1988.12.01

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