CN202925102U - Recycling system for sulphuric acid picking waste liquor - Google Patents
Recycling system for sulphuric acid picking waste liquor Download PDFInfo
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- CN202925102U CN202925102U CN 201220596630 CN201220596630U CN202925102U CN 202925102 U CN202925102 U CN 202925102U CN 201220596630 CN201220596630 CN 201220596630 CN 201220596630 U CN201220596630 U CN 201220596630U CN 202925102 U CN202925102 U CN 202925102U
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- heat exchanger
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- mother liquor
- cooling
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Abstract
The utility model discloses a cooling, crystallizing and recycling system for sulphuric acid picking waste liquor. In a recycling system for the sulphuric acid picking waste liquor, the outlet of a feeding pump is communicated with the tube side inlet of a cold-recycling heat exchanger by a pipeline; the tube side outlet of the cold-recycling heat exchanger is communicated with the tube side inlet of a cooling heat exchanger by a pipeline; the tube side outlet of the cooling heat exchanger is communicated with the feeding hole of a crystallizing centrifugal machine by a pipeline; the mother liquor outlet of the crystallizing centrifugal machine is communicated with the inlet of a mother liquor recycling pump by a pipeline; the outlet of the mother liquor recycling pump is communicated with the tube side inlet of the cold-recycling heat exchanger by a pipeline; and frozen brine water provided by a refrigerator is accessed to the tube side of the cooling heat exchanger. The cooling capacity of the mother liquor is recycled by the cold-recycling heat exchanger, so that the feed liquor is pre-cooled, and the possibility that the feed liquor is directly crystallized and blocked in the cooling heat exchanger is reduced; meanwhile, the crystallizing and separating are completed by one step in the centrifugal machine without cooling and crystallizing containers; and besides, the process is simple, the floor space for unit capacity is small, the operation is convenient, and the on-line recycling of the pickling waste liquor can be achieved.
Description
Technical field
The utility model belongs to sulfuric acid pickling waste liquid and reclaims field, particularly a kind of sulfuric acid pickling waste liquid crystallisation by cooling recovery system.
Background technology
Metal finishing industry sulfuric acid washing commonly used is as pretreatment procedure, to remove iron scale and the iron rust of steel surface, during sulfuric acid washing, contain appropriate FeSO4 in acid solution and can strengthen pickling, shorten pickling time, this is because in sulfuric acid, molysite is soluble in water, and in solution, iron concentration increases, and the electrochemical reaction ability of solution is strengthened.But when the Fe ion content surpassed 5-8% (weight), along with FeSO4 content increases, pickling effect just was affected, the sulfuric acid that must more renew.The treatment process of sulfuric acid pickling waste liquid mainly contains: evaporation partition method, ion-exchange-resin process, crystallisation by cooling method, neutralisation, film dialysis etc., it is Waste Sulfuric Acid to be utilized ferrous sulfate solubility with temperature variation characteristic greatly under cold condition that the crystallisation by cooling method is processed spent acid, spent acid solution is cooling, obtain ferrous sulfate and contain the slightly regenerating acid of lower concentration ferrous salt, method of cooling can adopt direct cold method or vacuum vapor deposition method.But existing method of cooling generally needs larger crystallisation by cooling still, and floor space is large, and throughput is low, and working cost is higher.
Therefore, design a a kind of sulfuric acid pickling waste liquid recovery system of extraordinary processing and recovery of can carrying out the sulfuric acid after pickling for above-mentioned situation, just contriver's problem that will solve.
Summary of the invention
For the deficiencies in the prior art, technology of the present utility model is utilized centrifugal Crystallization Separation technology, does not need extra crystallisation by cooling container, and the cold recovery rate is high, floor space is little, and is simple to operate, brings significant economic benefit to the user.
the technical scheme that its technical problem that solves the utility model adopts is: a kind of sulfuric acid pickling waste liquid recovery system, comprise cold recovery interchanger, cooling heat exchanger, fresh feed pump, whizzer, refrigerator, mother liquor reclaims pump, it is characterized in that: in described sulfuric acid pickling waste liquid recovery system, the fresh feed pump outlet is passed through pipeline communication with the import of cold recovery heat exchanger tube pass, cold recovery heat exchanger tube pass outlet is passed through pipeline communication with the import of cooling heat exchanger tube side, the outlet of cooling heat exchanger tube side is passed through pipeline communication with crystallization whizzer opening for feed, the outlet of crystallization whizzer mother liquor is reclaimed pump inlet with mother liquor and is passed through pipeline communication, mother liquor reclaims pump discharge and pipeline communication is passed through in the import of cold recovery heat exchanger shell pass, the chilled brine that refrigerator provides is connected with the shell side of cooling heat exchanger.
The beneficial effects of the utility model are:
1, the utility model has adopted cold recovery interchanger to reclaim the cold of mother liquor, feed liquid obtains pre-cooled, slowed down the feed liquid possibility that direct crystallization stops up in cooling heat exchanger, realize in whizzer that simultaneously one step of Crystallization Separation completes, do not need the crystallisation by cooling container, technological process is simple, and unit production capacity floor space is little, easy to operate, can realize the online recycling of spent pickle liquor.
Description of drawings
Fig. 1 is the utility model structural representation.
Description of reference numerals: 1-fresh feed pump; The cold recovery interchanger of 2-; The 3-cooling heat exchanger; 4-crystallization whizzer; The 5-refrigerator; 6-reclaims pump; The 7-discharge gate; 8-mother liquor discharge outlet.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model, should be understood that these embodiment only are used for explanation the utility model and are not used in restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values drop on application appended claims limited range equally.
Fig. 1 is a kind of sulfuric acid pickling waste liquid recovery system of the utility model structural representation, the sulfuric acid pickling waste liquid recovery system that the present embodiment proposes mainly comprises fresh feed pump 1, cold recovery interchanger 2, cooling heat exchanger 3, crystallization whizzer 4, refrigerator 5, in described sulfuric acid pickling waste liquid recovery system, fresh feed pump 1 outlet is passed through pipeline communication with cold recovery interchanger 2 tube side imports, cold recovery interchanger 2 tube side outlets are passed through pipeline communication with 3 imports of cooling heat exchanger tube side, 3 outlets of cooling heat exchanger tube side are passed through pipeline communication with crystallization whizzer 4 opening for feeds, the 4 mother liquor outlets of crystallization whizzer are reclaimed pump 6 imports with mother liquor and are passed through pipeline communication, mother liquor reclaims pump 6 outlets and passes through pipeline communication with cold recovery interchanger 2 shell side imports, the chilled brine that refrigerator provides is connected with the shell side of cooling heat exchanger 3.
Stoste enters cold recovery interchanger 2 precoolings by fresh feed pump 1, and reclaim the cold that is reclaimed the recovery mother liquor that pump 6 sends here by mother liquor, enter again cold 3 but to 0 of cooling heat exchanger ℃--after 10 ℃, enter crystallization whizzer 4, in the crystallization whizzer 4, the rapid crystallization of ferrous sulfate in feed liquid, and under the effect of centrifugal force, solid-liquid separation, the solid sulphuric acid ferrous iron is discharged at the discharge gate 7 of crystallization whizzer 4, and mother liquor is discharged at the mother liquor discharge outlet 8 of crystallization whizzer 4; Mother liquor reclaims pump 6 by mother liquor and sends into cold recovery interchanger 2 recovery colds, is back to complex acid production after the raising temperature; The subcooling that refrigerator 5 provides chilled brine to send cooling heat exchanger 3 to realize feed liquid, native system can carry out periodical operation or operate continuously according to the real work needs.
Claims (1)
1. sulfuric acid pickling waste liquid recovery system, comprise cold recovery interchanger, cooling heat exchanger, fresh feed pump, whizzer, refrigerator, mother liquor reclaims pump, it is characterized in that: in described sulfuric acid pickling waste liquid recovery system, the fresh feed pump outlet is passed through pipeline communication with the import of cold recovery heat exchanger tube pass, cold recovery heat exchanger tube pass outlet is passed through pipeline communication with the import of cooling heat exchanger tube side, the outlet of cooling heat exchanger tube side is passed through pipeline communication with crystallization whizzer opening for feed, the outlet of crystallization whizzer mother liquor is reclaimed pump inlet with mother liquor and is passed through pipeline communication, mother liquor reclaims pump discharge and pipeline communication is passed through in the import of cold recovery heat exchanger shell pass, the chilled brine that refrigerator provides is connected with the shell side of cooling heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220596630 CN202925102U (en) | 2012-11-13 | 2012-11-13 | Recycling system for sulphuric acid picking waste liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220596630 CN202925102U (en) | 2012-11-13 | 2012-11-13 | Recycling system for sulphuric acid picking waste liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202925102U true CN202925102U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220596630 Expired - Fee Related CN202925102U (en) | 2012-11-13 | 2012-11-13 | Recycling system for sulphuric acid picking waste liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202925102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670081A (en) * | 2019-09-04 | 2020-01-10 | 北京耀智环保科技有限公司 | Acid recovery device and process method for reverse ion exchange |
-
2012
- 2012-11-13 CN CN 201220596630 patent/CN202925102U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670081A (en) * | 2019-09-04 | 2020-01-10 | 北京耀智环保科技有限公司 | Acid recovery device and process method for reverse ion exchange |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |