CN103030117A - Recovering technology for waste acid - Google Patents
Recovering technology for waste acid Download PDFInfo
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- CN103030117A CN103030117A CN201210596495XA CN201210596495A CN103030117A CN 103030117 A CN103030117 A CN 103030117A CN 201210596495X A CN201210596495X A CN 201210596495XA CN 201210596495 A CN201210596495 A CN 201210596495A CN 103030117 A CN103030117 A CN 103030117A
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- Prior art keywords
- acid
- gas
- spent acid
- product
- separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002253 acid Substances 0.000 title claims abstract description 64
- 239000002699 waste material Substances 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 title abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 25
- 238000005406 washing Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000000567 combustion gas Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 241000282326 Felis catus Species 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002309 gasification Methods 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000009834 vaporization Methods 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- 235000010215 titanium dioxide Nutrition 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention aims at providing a recovering technology for waste acid, which is short in flow, high in adaptability, little in power equipment, easy to control and energy-saving. The technology is characterized in that the whole technology consists of a combustion and gasification separation system, a product acid generation and separation system and a waste acid preheating system. The technology has the benefits: (1) the whole technological flow is short, the power equipment is little, and investment and the operation costs can be saved, (2) technological parameters are easy to adjust, requirements of a wider waste acid treating concentration range and a wider product concentration range are met, the technology is suitable for recovering waste sulfuric acid with middle/low concentration (10-90%), the concentration of a recovery product can be adjusted, and the appropriate concentration is 70-90%, and (3) the recovering technology is low in energy consumption, and has considerable economic benefits.
Description
Technical field
The invention belongs to the spent acid solution process field.The present invention relates to a kind of spent acid and reclaim technique.
Background technology
Sulfuric acid is industrial mother liquor, a lot of industries are used sulfuric acid, chemical engineering industry particularly, produce a large amount of spent acid, use sour as gas mixture in the calcium carbide process PVC production is dry with acid and acetylene cleaning, produce the black Waste Sulfuric Acid (concentration is 70%～95%) of high density, and for example produce a large amount of spent acid of about 20% in the Producing Titanium Dioxide.These spent acid are difficult to recycle, and cause very large pressure to ecological, environmental protective.
Patents about spent acid has:
CN102730650A discloses a kind of titanium white waste acid and has reclaimed technique, further says take fire coal or combustion gas as the energy, takes temperature control gasification absorption technique reclaim(ed) sulfuric acid; Whole technique is comprised of burning operation, vaporization cleaning section, absorption operation, waste heat recovery operation and vent gas treatment operation.The invention has the beneficial effects as follows: recovered acid is purer, and concentration is adjustable, and economic concentration is 80～90%, can satisfy the purpose of Producing Titanium Dioxide reuse fully; Vitriol is separated with solid formation in the spent acid, can further fully utilize; The recovery energy consumption is low, has considerable economic benefit.
This patent has solved the recovery problem of titanium white waste acid well, but still there is complex process in this technique, and power-equipment is many, and processing parameter is adjusted long problem time of lag.
Summary of the invention
The object of the present invention is to provide a kind of flow process weak point, strong adaptability, power-equipment few, be easy to control and the spent acid of save energy reclaims technique.
The present invention be embodied in following some:
(1) whole technique is comprised of fired vapour separation system, product acid generation separation system and spent acid pre-heating system, wherein the fired vapour separation system is comprised of combustion unit 1, temperature control gas tank 2, Venturi tube 3 and cyclonic separator 4, product acid absorption extraction system by the second Venturi tube 5, form, the spent acid preheating procedure, by spent acid interchanger 7, product storage tank 8, spent acid groove 9, and sour pump 10, sour pump 11 and sour pump 12 form; Flow process is short, and strong adaptability, power-equipment be few, be easy to control, thereby can reduce investment outlay and process cost.
(2) the easier adjustment of processing parameter, temperature control absorbs to reach regulates the purpose that reclaims product concentration, regulative mode can be by the spray acid amount of regulating the second Venturi tube 5 and absorbing separator 6 spray acids or the control of recycle acid amount, it is convenient to regulate, a set of equipment adapts to wider processing acid-spending strength and wider product concentration demand, be applicable to the recovery of middle lower concentration (10～90%) Waste Sulfuric Acid, it is adjustable to reclaim product concentration, and reclaiming the product suitable concentration is 70～90%; Replace spray cooling with the 5 spray acid cooling condensations of the second Venturi tube, can reduce separator to the load of acid mist separation and reduce the thermosteresis that gas is taken steam out of.
(3) absorbing separator 6 adopts cylindrical shell and tower body to form connected device, equipment and materials adopts general Steel Lining tetrafluoro, arrange in the cylindrical shell and tetrafluoro material bead is set on horizontal baffle, the horizontal baffle becomes rapid ball layer, under the horizontal baffle coil heat exchanger is set, tower body is the padding washing tower structure, stuffing washing tower is divided into two-layer (sour absorption layer and water washing layer), cat head installs mesh mist eliminator additional, tail gas is up to standard can directly discharge for stuffing washing tower outlet, or adds vent gas treatment to reach stricter environmental protection standard; Replace the series connection absorbing separator with the disjunctor tower, can reduce the demand of power-driven pump.
(4) take combustion gas as the energy, the combustion gas supercharging enters burner 1, air enters combustion chamber and temperature adjustment gas tank after gas blower 13 pressurizations, the supercharging pressurization provides the pressure drop of follow-up flow process pipe-line equipment as index take combustion unit, do not establish booster fan or induced draft fan in the flow process, to reduce the power consumption of whole system; Air not preheating enters system, shortened process to greatest extent, reduce cost; Venturi tube adopts the venturi scrubber with internal injection structure, liner silica glass, inlet gas flow velocity: 18m/s, trunnion central gas speed: 60m/s; Cyclonic separator should adopt Type B or E type cyclone separator arrangement, and material adopts general steel, or adds wear-resistant liner.
Description of drawings
Accompanying drawing is process flow diagram of the present invention
Below in conjunction with accompanying drawing production technique of the present invention is described further.
Embodiment
With reference to accompanying drawing, whole technique is comprised of vaporization separation circuit, absorption extraction operation, spent acid preheating procedure.
(1) the vaporization separation circuit is comprised of combustion unit 1, temperature control gas tank 2, Venturi tube 3 and cyclonic separator 4.Take combustion gas as the energy, combustion gas B is pressurized to 〉=and 5KPa enters burner 1, air A through gas blower 13 pressurization (〉=enter combustion chamber and temperature control gas tank 2 after 5KPa), enter Venturi tube 3, at the spent acid of Venturi tube 3 throats suction through preheating, enter cyclonic separator 4 after the vaporization rapidly, cyclonic separator 4 service temperatures are controlled at about 380 ℃, impurity in the spent acid (acid sludge G) is separated lower in cyclonic separator 4, and flue gas send the absorption extraction operation after separating.
(2) absorption extraction operation is comprised of the second Venturi tube 5, separator 6, and wherein separator 6 forms connected device by cylindrical shell and tower body.The vaporization separation circuit comes gas mixture to pass through the second Venturi tube 5, the second Venturi tube 5 throats spray into through the cooling finished acid E, mixed flue gas C reduces heat to 180～200 ℃, in separator 6, realize gas-liquid separation, through the coil heat exchanger heat exchange, temperature is kept about 150～180 ℃ to liquid phase in separator 6 bottoms; Tower body is the padding washing tower structure, and cycles of washing liquid is supplied with by sour pump 10,11, and the stuffing washing tower upper strata is water D scrubber layer, uses when going into operation, and also can require according to tail gas for subsequent use; Up to standard can directly discharging of stuffing washing tower outlet tail gas C.
(3) spent acid preheating procedure, by spent acid interchanger 7, product storage tank 8, spent acid groove 9, and sour pump 10, sour pump 11 and sour pump 12 form, wherein spent acid interchanger 7 sets up tetrafluoro heat exchanger separately and graphite heat exchanger is composed in series.Come about 150 ℃ of sulfuric acid temperature by separator 6, send the spent acid interchanger 7 heat exchange, temperature drops to below 40 ℃, send product storage tank 8; Simultaneously, by spent acid groove 9 through the spent acid F of sour pump 12 pressurizations respectively through spent acid interchanger 7, separator 6 bottoms through the coil heat exchanger heat exchange, temperature rises to about 180 ℃ and send Venturi tube 3.
The invention has the beneficial effects as follows: (1) whole technical process is short, and power-equipment is few, can reduce investment outlay and process cost; (2) the easier adjustment of processing parameter adapts to wider processing acid-spending strength and wider product concentration demand, is applicable to the recovery of middle lower concentration (10～90%) Waste Sulfuric Acid, and it is adjustable to reclaim product concentration, and the product suitable concentration is 70～90%; (3) the recovery energy consumption is low, has considerable economic benefit.
Claims (4)
1. a spent acid reclaims technique, the spent acid that purpose is to provide a kind of flow process weak point, strong adaptability, be easy to control reclaims technique, it is characterized in that: whole technique generates separation system by fired vapour separation system, product acid and the spent acid pre-heating system forms, wherein the fired vapour separation system is comprised of combustion unit 1, temperature control gas tank 2, Venturi tube 3 and cyclonic separator 4, product acid absorption extraction system by the second Venturi tube 5, form, the spent acid preheating procedure, by spent acid interchanger 7, product storage tank 8, spent acid groove 9, and sour pump 10, sour pump 11 and sour pump 12 form; Flow process is short, and strong adaptability, power-equipment be few, be easy to control, can reduce investment outlay and process cost.
2. reclaim technique according to right 1 described spent acid, it is characterized in that: the easier adjustment of processing parameter, temperature control absorbs to reach regulates the purpose that reclaims product concentration, regulative mode can be by the spray acid amount of regulating the second Venturi tube 5 and absorbing separator 6 spray acids or the control of recycle acid amount, it is convenient to regulate, a set of equipment adapts to wider processing acid-spending strength and wider product concentration demand, be applicable to the recovery of middle lower concentration (10～90%) Waste Sulfuric Acid, the recovery product concentration is adjustable, and reclaiming the product suitable concentration is 70～90%; Replace spray cooling with the 5 spray acid cooling condensations of the second Venturi tube, can reduce separator to the load of acid mist separation and reduce the thermosteresis that gas is taken steam out of.
3. reclaim technique according to right 1 described spent acid, it is characterized in that: absorbing separator 6 adopts cylindrical shell and tower body to form connected device, equipment and materials adopts general Steel Lining tetrafluoro, horizontal baffle is set in the cylindrical shell, tetrafluoro material bead is set on the horizontal baffle becomes rapid ball layer, under the horizontal baffle coil heat exchanger is set, tower body is the padding washing tower structure, stuffing washing tower is divided into two-layer (sour absorption layer and water washing layer), cat head installs mesh mist eliminator additional, tail gas is up to standard can directly discharge for stuffing washing tower outlet, or adds vent gas treatment to reach stricter environmental protection standard; Replace the series connection absorbing separator with the disjunctor tower, can reduce the demand of power-driven pump.
4. reclaim technique according to right 1 described spent acid, it is characterized in that: take combustion gas as the energy, the combustion gas supercharging enters burner 1, air enters combustion chamber and temperature adjustment gas tank after gas blower 13 pressurizations, the supercharging pressurization provides the pressure drop of follow-up flow process pipe-line equipment as index take combustion unit, do not establish booster fan or induced draft fan in the flow process, to reduce the power consumption of whole system; Air not preheating enters system, shortened process to greatest extent, reduce cost; Venturi tube adopts the venturi scrubber with internal injection structure, liner silica glass, inlet gas flow velocity: 18m/s, trunnion central gas speed: 60m/s; Cyclonic separator should adopt Type B or E type cyclone separator arrangement, and material adopts general steel, or adds wear-resistant liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210596495.XA CN103030117B (en) | 2012-12-28 | 2012-12-28 | Recovering technology for waste acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210596495.XA CN103030117B (en) | 2012-12-28 | 2012-12-28 | Recovering technology for waste acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103030117A true CN103030117A (en) | 2013-04-10 |
| CN103030117B CN103030117B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210596495.XA Active CN103030117B (en) | 2012-12-28 | 2012-12-28 | Recovering technology for waste acid |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016311A (en) * | 2014-06-09 | 2014-09-03 | 淮南市明月环保科技有限责任公司 | System for producing sulphuric acid purified feed gas from concentrated waste acid |
| CN106829880A (en) * | 2016-12-08 | 2017-06-13 | 荆门市渝楚化工有限公司 | A kind of regeneration of sulfuric acid production line |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3713786A (en) * | 1971-12-06 | 1973-01-30 | New Jersey Zinc Co | Evaporative sulfuric acid recovery from sulfuric acids containing sulfates |
| CN102730650A (en) * | 2011-04-12 | 2012-10-17 | 安徽理工大学 | Recovery technology of titanium white waste acid |
| CN102745655A (en) * | 2011-04-22 | 2012-10-24 | 安徽理工大学 | Waste acid recovery technology for PVC factory |
| CN102826518A (en) * | 2011-06-15 | 2012-12-19 | 安徽理工大学 | Concentrated waste acid recovery technology |
-
2012
- 2012-12-28 CN CN201210596495.XA patent/CN103030117B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3713786A (en) * | 1971-12-06 | 1973-01-30 | New Jersey Zinc Co | Evaporative sulfuric acid recovery from sulfuric acids containing sulfates |
| CN102730650A (en) * | 2011-04-12 | 2012-10-17 | 安徽理工大学 | Recovery technology of titanium white waste acid |
| CN102745655A (en) * | 2011-04-22 | 2012-10-24 | 安徽理工大学 | Waste acid recovery technology for PVC factory |
| CN102826518A (en) * | 2011-06-15 | 2012-12-19 | 安徽理工大学 | Concentrated waste acid recovery technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016311A (en) * | 2014-06-09 | 2014-09-03 | 淮南市明月环保科技有限责任公司 | System for producing sulphuric acid purified feed gas from concentrated waste acid |
| CN104016311B (en) * | 2014-06-09 | 2016-03-02 | 淮南市明月环保科技有限责任公司 | A kind of dense spent acid produces sulfuric acid purification unstripped gas system |
| CN106829880A (en) * | 2016-12-08 | 2017-06-13 | 荆门市渝楚化工有限公司 | A kind of regeneration of sulfuric acid production line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103030117B (en) | 2014-10-08 |
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| C14 | Grant of patent or utility model | ||
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| CB03 | Change of inventor or designer information |
Inventor after: Ni Shujun Inventor before: Tao Jun Inventor before: Xu Jihong |
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| TR01 | Transfer of patent right |
Effective date of registration: 20171011 Address after: Baishuiyang town Huang Tanyang coastal village of Taizhou City, Zhejiang province 317032 City No. 155 Patentee after: Ni Shujun Address before: 232001 Anhui Province, Huainan city tianjia'an District Chaoyang Street Garden Village Bai Jiao yuan building 602 room 2 Patentee before: Huainan City's bright moon environmental protection science and technology limited Company |
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Effective date of registration: 20190603 Address after: 225400 No. 10 Xingang Road, Taixing Economic Development Zone, Taizhou City, Jiangsu Province Patentee after: Taixing Jinhui Chemical Industry Co., Ltd. Address before: 317032 155 Huang Tan Yang village, Baishui Yang, Taizhou, Zhejiang. Patentee before: Ni Shujun |