CN204111344U - Full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system - Google Patents
Full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system Download PDFInfo
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- CN204111344U CN204111344U CN201420597954.0U CN201420597954U CN204111344U CN 204111344 U CN204111344 U CN 204111344U CN 201420597954 U CN201420597954 U CN 201420597954U CN 204111344 U CN204111344 U CN 204111344U
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- hydrochloric acid
- iron protochloride
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Abstract
The utility model relates to a kind of full graphite equipment acid regeneration and utilizes and reclaim iron protochloride crystal treatment system, it comprises the waste hydrochloric acid storage tank be connected successively, hydrochloric acid discharging pump, flow director, graphite preheater, circulating and evaporating system, graphite condenser, graphite falling film absorber, graphite washing tower, graphite squirt pump, graphite condenser is connected with finished acid storage tank by transport pipe with graphite falling film absorber lower end, circulating and evaporating system lower end is connected with crystallisation by cooling still by transport pipe, crystallisation by cooling still is connected with waste hydrochloric acid storage tank with hydrochloric acid in-line pump by filter centrifugation separator successively.The difficult problem that current hydrochloric acid pickling waste liquor intractability is large, cost is high is solved by native system, each spent acid output enterprise is while can reaching national requirements for environmental protection, not only can reclaim a large amount of spent acid solutions produced in acid cleaning process, waste hydrochloric acid regeneration is utilized, but also can iron protochloride be reclaimed, spent acid solution can be turned waste into wealth, reasonably again utilize, save resource greatly.
Description
Technical field
The utility model relates to chemical field, relates to Waste acid treating device specifically, and specifically a kind of full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system.
Background technology
At present, China's Iron And Steel Industry, metal product industry need remove steel surface iron scale and use hydrochloric acid to carry out pickling in process of production, can produce a large amount of spent acid solutions in acid cleaning process.The composition of hydrochloric acid pickling waste liquor is mainly: free acid, iron protochloride and water, and its content is different and different with acid cleaning process, service temperature, steel material, specification, and general chloride containing ferrous 20-26%, free acid 5-8%, all the other are water.
This type of discharging of waste liquid amount of China is surprising, and general production steel per ton can produce spent pickle liquor and be about 55-72kg.Current Iron And Steel Industry has become uses water rich and influential family, is also that waste liquid produces rich and influential family simultaneously.According to the statistics made by the departments concerned, the wastewater flow rate that only Key Iron And Steel discharges every year just has more than 30 hundred million cubes.For the process of this kind of waste liquid, main employing two kinds of methods at present: is acid-base neutralisation method, and two is regeneration of hydrochloric acid methods.
Regeneration of hydrochloric acid method tradition is all the mode adopting heating evaporation, spray burning.Hydrochloric acid regenerating device domestic is at present all introduce, and its technique carries out direct heating to spent acid solution to reclaim hydrochloric acid and ferric oxide, and minority TECHNIQUE TO LARGE INTEGRATED STEEL WORKS adopts Lurgi process and Shandong Turner method.This treatment process one-time investment is large, operation and maintenance cost is high, structure deteriorate is serious, and general medium-sized and small enterprises are difficult to bear.Therefore, domestic medium-sized and small enterprises mostly adopt limestone vegetation method, make in spent acid solution and rear qualified discharge.But this method need consume a large amount of lime, and the body refuse producing a large amount of water ratio 99% needs drying and other treatment.The method treatment facility investment and processing cost also all higher, and the useful resources in spent acid solution fail recycling.
Utility model content
According to above-mentioned weak point, the purpose of this utility model is to provide a kind of full graphite equipment acid regeneration and utilizes and reclaim iron protochloride crystal treatment system, the difficult problem that current hydrochloric acid pickling waste liquor intractability is large, cost is high can be solved, each spent acid output enterprise is while can reaching national requirements for environmental protection, spent acid solution can be turned waste into wealth again, reasonably again utilize, save resource greatly.
For achieving the above object, the technical solution of the utility model is: a kind of full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system, it comprises waste hydrochloric acid storage tank, described waste hydrochloric acid storage tank is connected with graphite preheater with flow director by hydrochloric acid discharging pump successively, described graphite preheater is connected with circulating and evaporating system, described circulating and evaporating system successively with graphite condenser, graphite falling film absorber, graphite washing tower is connected, graphite washing tower is finally connected with the graphite squirt pump of system end, described graphite condenser is connected with finished acid storage tank by transport pipe with graphite falling film absorber lower end, described circulating and evaporating system lower end is connected with crystallisation by cooling still by transport pipe, described crystallisation by cooling still is connected with waste hydrochloric acid storage tank with hydrochloric acid in-line pump by filter centrifugation separator successively.
Adopt lining steel shell graphite tube by native system graphite evaporator, inside is complete overall graphite tube structure design, adds large equipment intensity, reduces leak source.Graphite washing tower latter end connects graphite squirt pump, makes the gas flow of whole system produce negative pressure, reduces energy loss.The diluted acid that graphite condenser condensation produces and graphite washing tower wash the diluted acid obtained and as the absorption liquid of graphite falling film absorber, farthest can reclaim hydrochloric acid.Native system not only can reclaim a large amount of spent acid solutions produced in acid cleaning process, is utilized by waste hydrochloric acid regeneration, but also can reclaim iron protochloride, and simply, running cost is low for the equipment of recycling and method, and energy utilization is simultaneously abundant, has saved the energy.
Preferably: described circulating and evaporating system comprises graphite evaporator and graphite heater, the lower end of described graphite evaporator is connected with the lower side of graphite heater by transport pipe, and the lower side of described graphite evaporator is connected with graphite heater top by transport pipe.Effectively can utilize thermal source by circulating and evaporating system, thermal source is fully used.
Preferably: between the lower end of described graphite evaporator and the lower side of graphite heater, be provided with hydrochloric acid in-line pump.Spent acid solution pump circulation can be made, strengthen heat exchange efficiency, prevent xln to be attached on duct wall and tank skin.
Preferably: described graphite evaporator upper end is connected with graphite condenser upper end.Be convenient to hydrogen chloride gas conveying.
Preferably: described graphite heater lower end is connected with crystallisation by cooling still.Be convenient to being transported in crystallisation by cooling still of concentrated solution.
Preferably: described graphite preheater lower end is connected with the upper side of graphite evaporator.
Preferably: between described graphite heater lower end side and graphite preheater upper side, be provided with steam-pipe.Unnecessary steam is fully utilized.
Preferably: between described graphite washing tower lower end and graphite falling film absorber upper side, be provided with transport pipe.
The beneficial effects of the utility model are: solve by native system the difficult problem that current hydrochloric acid pickling waste liquor intractability is large, cost is high, each spent acid output enterprise is while can reaching national requirements for environmental protection, not only can reclaim a large amount of spent acid solutions produced in acid cleaning process, waste hydrochloric acid regeneration is utilized, but also can iron protochloride be reclaimed, spent acid solution can be turned waste into wealth, reasonably again utilize, save resource greatly.Simply, running cost is low for the equipment of this recycling and method, and energy utilization is simultaneously abundant, has saved the energy, has achieved the zero release of spent acid solution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1-waste hydrochloric acid storage tank; 2-hydrochloric acid discharging pump; 3-flow director; 4-graphite preheater; 5-graphite evaporator; 6-graphite heater; 7-graphite condenser; 8-graphite falling film absorber; 9-graphite washing tower; 10-graphite squirt pump; 11-finished product hydrochloric acid tank; 12-crystallisation by cooling still; 13-filter centrifugation separator; 14-hydrochloric acid in-line pump.A-spent acid solution; B-secondary steam; C-concentrated solution; The azeotrope of D-water and HCl; E-steam; F-water coolant; G-finished acid; H-noncondensable gas; I-olefin(e) acid liquid; The a small amount of tail gas of J-; The a small amount of clear water of K-; L-water drain; M-iron protochloride crystal; The isolated mother liquor of N-.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further.
The full graphite equipment acid regeneration of one as shown in Figure 1 utilizes and reclaims iron protochloride crystal treatment system, it comprises waste hydrochloric acid storage tank 1, waste hydrochloric acid storage tank 1 is connected with graphite preheater 4 with flow director 3 by hydrochloric acid discharging pump 2 successively, graphite preheater 4 is connected with circulating and evaporating system, circulating and evaporating system successively with graphite condenser 7, graphite falling film absorber 8, graphite washing tower 9 is connected, graphite washing tower 9 is finally connected with graphite squirt pump 10, graphite condenser 7 is connected with finished product hydrochloric acid tank 11 by transport pipe with graphite falling film absorber 8 lower end, circulating and evaporating system lower end is connected with crystallisation by cooling still 12 by transport pipe, crystallisation by cooling still 12 is connected with waste hydrochloric acid storage tank 1 with hydrochloric acid in-line pump 14 by filter centrifugation separator 13 successively.Wherein, circulating and evaporating system comprises graphite evaporator 5 and graphite heater 6, and the lower end of graphite evaporator 5 is connected by the lower side of transport pipe with graphite heater 6, and the lower side of graphite evaporator 5 is connected with graphite heater 6 top by transport pipe.Further, hydrochloric acid in-line pump 14 is provided with between the lower end of graphite evaporator 5 and the lower side of graphite heater 6.For the ease of the conveying of each material, graphite preheater 4 lower end is connected with the upper side of graphite evaporator 5, and graphite evaporator 5 upper end is connected with graphite condenser 7 upper end, and graphite heater 4 lower end is connected with crystallisation by cooling still 12.
Under regard to the process utilizing this device to reclaim iron protochloride crystal and hydrochloric acid from hydrochloric acid pickling waste liquor and be specifically described.
From the spent acid solution A of pickling tank, first enter in waste hydrochloric acid storage tank 1, measure to graphite preheater 4 material loading by hydrochloric acid discharging pump 2 and flow director 3, spent acid solution A is regulated by the opening degree size of valve before and after under meter.Spent acid solution A is after graphite preheater 4 preheating, enter the circulating and evaporating system be made up of graphite evaporator 5 and graphite heater 6, steam E as thermal source enters in graphite heater 6, feed liquid is recycled heating in this vapo(u)rization system, hydrochloric acid in-line pump 14 is added between graphite evaporator 5 and graphite heater 6, spent acid solution pump circulation can be made, strengthen heat exchange efficiency, prevent xln to be attached on duct wall and tank skin.When after the vaporization temperature that feed liquid reaches certain, the azeotrope D of water and HCl can enter graphite condenser 7 from graphite evaporator 5 top successively under negative-pressure adsorption effect, graphite falling film absorber 8, in graphite washing tower 9, the finished acid G that hydrogen chloride gas obtains through graphite condenser 7 condensation can enter finished acid storage tank 11, also graphite falling film absorber 8 can be entered as absorption liquid together with washing through graphite washing tower 9 diluted acid obtained, at a large amount of hydrogen chloride gas of absorption, obtain finished acid G enter finished acid storage tank 11 by passing into water coolant F, graphite condenser 7 out forms finally by graphite washing tower 9 top the tail gas J reaching standard on a small quantity with the noncondensable gas H in graphite falling film absorber and enters water drain L by graphite squirt pump 10.Graphite squirt pump 10 makes the gas flow of whole system produce negative pressure, reduces energy loss.Graphite heater 6 is provided with the afterheat steam pipeline be communicated with graphite preheater 4, and excess steam is utilized more fully.While steaming water and HCl gas, constantly supplement in described circulating and evaporating system from feed liquid new after graphite preheater 4 preheating.Sunk to entering among crystallisation by cooling still 12 through pipeline by the concentrated solution C that graphite evaporator 5 concentrates, through the further cooling down of crystallisation by cooling still 12 so that produce iron protochloride xln (FeCl
24H
2o), after cooling to design temperature, put to filter centrifugation separator 13, to realize being separated of iron protochloride xln and mother liquor, directly can be packaged into commodity selling through the iron protochloride xln M of centrifuge dripping.The mother liquor N that a small amount of centrifugation goes out is collected in spent acid container for storing liquid 1 by hydrochloric acid in-line pump 14, (also can be used as high concentration liquid iron protochloride product to sell), get in graphite preheater 4 opening for feed through spent acid discharging pump 2 again after mixing with acid-washing waste acid, enter next circular treatment flow process after being heated, so go round and begin again.By-product FeCl while recovery dilute hydrochloric acid
2xln, makes spent acid be processed, and whole system environmental protection and energy saving are simple to operate.
Hydrochloric acid pickling waste liquor temperature in heating evaporation concentration process is higher, hydrochloric acid corrosion resistance is very strong, adopt graphite evaporator and the graphite heater of corrosion-resistant and that the coefficient of heat transfer is higher graphite material, equipment corrosion degree is greatly reduced, effectively extend the work-ing life of equipment, reduce spent pickle liquor treating processes equipment operation maintenance expense.Graphite evaporator is for adopting lining steel shell graphite tube, and inside is complete overall graphite tube structure design, adds large equipment intensity, reduces leak source.The regeneration hydrochloric acid purity reclaimed is high, pickling process can be directly used in after complex acid, the technique of regenerant salt acid-utilising due to iron protochloride not volatile, the hydrogenchloride that vapo(u)rization system steams and the dilute hydrochloric acid of water vapor through the condenser of graphite material, 10 ~ 15% of falling-film absorber condensed absorbent, substantially chloride containing is not ferrous, thus purity is higher, returns production line and use and can not produce any disadvantageous effect to acid cleaning process after complex acid.Byproduct iron protochloride crystal adopts woven bag packaging, be convenient to long-distance transportation, directly can be used as the raw material of plating, the coal stain of printing and dyeing, the tinting material etc. of pottery, also can produce the efficient water treatment medicine such as iron trichloride, poly-ferric chloride and the chemical products with high added-value such as iron pigment, ferrite through deep processing.The hot recycling hydrochloric acid reclaimed directly is got back in pickling tank after suitable complex acid, eliminates intensification heating when changing acid in a large number.The value of the utilization and the sale of by-product iron protochloride that regenerate hydrochloric acid in addition can be rolled over to processing cost, makes this treatment system keep lower running cost.
Claims (8)
1. a full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system, it comprises waste hydrochloric acid storage tank (1), described waste hydrochloric acid storage tank (1) is connected with graphite preheater (4) with flow director (3) by hydrochloric acid discharging pump (2) successively, it is characterized in that: described graphite preheater (4) is connected with circulating and evaporating system, described circulating and evaporating system successively with graphite condenser (7), graphite falling film absorber (8), graphite washing tower (9) is connected, graphite washing tower (9) is finally connected with the graphite squirt pump (10) of system end, described graphite condenser (7) is connected with finished acid storage tank (11) by transport pipe with graphite falling film absorber (8) lower end, described circulating and evaporating system lower end is connected with crystallisation by cooling still (12) by transport pipe, described crystallisation by cooling still (12) is connected with waste hydrochloric acid storage tank (1) with hydrochloric acid in-line pump (14) by filter centrifugation separator (13) successively.
2. full graphite equipment acid regeneration according to claim 1 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: described circulating and evaporating system comprises graphite evaporator (5) and graphite heater (6), the lower end of described graphite evaporator (5) is connected by the lower side of transport pipe with graphite heater (6), and the lower side of described graphite evaporator (5) is connected with graphite heater (5) top by transport pipe.
3. full graphite equipment acid regeneration according to claim 2 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: be provided with hydrochloric acid in-line pump (14) between the lower end of described graphite evaporator (5) and the lower side of graphite heater (6).
4. the full graphite equipment acid regeneration according to Claims 2 or 3 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: described graphite evaporator (5) upper end is connected with graphite condenser (7) upper end.
5. the full graphite equipment acid regeneration according to Claims 2 or 3 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: described graphite heater (6) lower end is connected with crystallisation by cooling still (12).
6. full graphite equipment acid regeneration according to claim 1 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: described graphite preheater (4) lower end is connected with the upper side of graphite evaporator (5).
7. the full graphite equipment acid regeneration according to Claims 2 or 3 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: be provided with steam-pipe between described graphite heater (6) lower end side and graphite preheater (4) upper side.
8. full graphite equipment acid regeneration according to claim 1 utilizes and reclaims iron protochloride crystal treatment system, it is characterized in that: be provided with transport pipe between described graphite washing tower (9) lower end and graphite falling film absorber (8) upper side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597954.0U CN204111344U (en) | 2014-10-16 | 2014-10-16 | Full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system |
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| CN201420597954.0U CN204111344U (en) | 2014-10-16 | 2014-10-16 | Full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system |
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| CN204111344U true CN204111344U (en) | 2015-01-21 |
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| CN201420597954.0U Expired - Fee Related CN204111344U (en) | 2014-10-16 | 2014-10-16 | Full graphite equipment acid regeneration utilizes and reclaims iron protochloride crystal treatment system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108383187A (en) * | 2018-05-10 | 2018-08-10 | 西安热工研究院有限公司 | A kind of station boiler citric acid wastewater enrichment facility and application method |
| CN108773857A (en) * | 2018-08-01 | 2018-11-09 | 江苏泰特联合环保科技有限公司 | A kind of sulfonation method steel part hydrochloric acid pickling waste liquor recycling treatment process and device |
| CN110395691A (en) * | 2019-07-04 | 2019-11-01 | 南通星球石墨设备有限公司 | A kind of regenerative system and regeneration method of the spent acid containing tar |
| CN113479852A (en) * | 2021-08-10 | 2021-10-08 | 黑龙江普莱德新材料科技有限公司 | Waste acid liquid recycling and regenerating system and method |
| CN115571893A (en) * | 2022-05-11 | 2023-01-06 | 陕西华特新材料股份有限公司 | Method for extracting and recovering boric acid from low-concentration hydrochloric acid waste liquid |
-
2014
- 2014-10-16 CN CN201420597954.0U patent/CN204111344U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108383187A (en) * | 2018-05-10 | 2018-08-10 | 西安热工研究院有限公司 | A kind of station boiler citric acid wastewater enrichment facility and application method |
| CN108773857A (en) * | 2018-08-01 | 2018-11-09 | 江苏泰特联合环保科技有限公司 | A kind of sulfonation method steel part hydrochloric acid pickling waste liquor recycling treatment process and device |
| CN108773857B (en) * | 2018-08-01 | 2023-10-13 | 江苏泰特联合环保科技有限公司 | Resource treatment process and device for hydrochloric acid pickling waste liquid of steel product by sulfonation method |
| CN110395691A (en) * | 2019-07-04 | 2019-11-01 | 南通星球石墨设备有限公司 | A kind of regenerative system and regeneration method of the spent acid containing tar |
| CN110395691B (en) * | 2019-07-04 | 2022-07-19 | 南通星球石墨股份有限公司 | Regeneration system and regeneration method for waste acid containing tar |
| CN113479852A (en) * | 2021-08-10 | 2021-10-08 | 黑龙江普莱德新材料科技有限公司 | Waste acid liquid recycling and regenerating system and method |
| CN115571893A (en) * | 2022-05-11 | 2023-01-06 | 陕西华特新材料股份有限公司 | Method for extracting and recovering boric acid from low-concentration hydrochloric acid waste liquid |
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Granted publication date: 20150121 Termination date: 20161016 |
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