CN207276725U - A kind of stainless steel is without nitric acid fountain acid washing test device - Google Patents
A kind of stainless steel is without nitric acid fountain acid washing test device Download PDFInfo
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- CN207276725U CN207276725U CN201720995927.2U CN201720995927U CN207276725U CN 207276725 U CN207276725 U CN 207276725U CN 201720995927 U CN201720995927 U CN 201720995927U CN 207276725 U CN207276725 U CN 207276725U
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- China
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- acid
- acid solution
- stainless steel
- descaling bath
- fountain
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Abstract
The utility model provides a kind of stainless steel without nitric acid fountain pickling experimental provision, include the circulating tank of sequential communication successively, acid solution service, descaling bath and acid solution reflux line, acid solution service is equipped with circulating pump and thermostat, the upper end of acid solution reflux line is connected with the bottom of descaling bath, the lower end of acid solution reflux line is connected with circulating tank, circulating tank is also prepared pipeline group with eo-acid and is connected, the bottom of circulating tank is equipped with acid solution outlet and waste liquid outlet, acid solution outlet is connected with the lower end of acid solution service, waste liquid outlet is connected with waste liquid discharge line, the sample fixing bracket for fixing acid-washing stainless steel sample is provided with descaling bath, some jet pipes being used for pickling sample injection acid solution are additionally provided with descaling bath, the upper end of acid solution service is connected with some jet pipes.Pickling experimental provision provided by the utility model can simulate actual production, and the experimental result drawn can preferable Instructing manufacture.
Description
Technical field
Acid-washing stainless steel field is the utility model is related to, a kind of stainless steel is referred in particular to and is filled without the acid washing test of nitric acid fountain
Put.
Background technology
At present, during acid-washing stainless steel, generally using nitration mixture (HNO3+ HF) pickling, due to the use of HNO during pickling3, cause acid
Washed journey can produce the nitrogenous exhaust gas of a large amount of high pollutions and nitrogenous effluent, and the nitrogenous exhaust gas that when most of Stainless Steel Plant's pickling discharges is dense
Degree is higher, generally higher than 500mg/m3, nitrogenous effluent is in 1000mg/L or so, and new environmental protection standard nitrogen exhaust gas concentration is by original
420mg/m3Fall below 150mg/m3, sewage discharge did not originally limit total nitrogen concentration, and new standard limitation sewage discharge is total
Nitrogen concentration need to be less than 15mg/L.
The country begins one's study new stainless steel without nitric acid acidwashing technique, and early period, pickling experiment was to carry out beaker in the lab
Experiment, the flow regime of pickle is controlled with magnetic stirring apparatus, it has bigger deviation with actual production, it is impossible to true
The flow regime of solution in the real live descaling bath of reaction.Therefore, the component of the pickle determined by Beaker Test and each component
For the parameters such as concentration, the temperature of pickle there may be certain deviation, it is actual raw that the experimental result drawn is unable to guide
Production.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of stainless steel without nitric acid fountain acid washing test device.
The technical solution adopted in the utility model is a kind of stainless steel without nitric acid fountain acid washing test device, it include according to
Circulating tank, acid solution service, descaling bath and the acid solution reflux line of secondary sequential communication, the acid solution service are equipped with and follow
Ring pumps and thermostat, the upper end of the acid solution reflux line are connected with the bottom of the descaling bath, the acid solution reflux line
Lower end is connected with the circulating tank, and the circulating tank is also prepared pipeline group with eo-acid and connected, and the bottom of the circulating tank is equipped with acid
Liquid exports and waste liquid outlet, and the acid solution outlet is connected with the lower end of the acid solution service, the waste liquid outlet and waste liquid
Discharge line connects, and the sample fixing bracket for fixing acid-washing stainless steel sample, the pickling are provided with the descaling bath
Some jet pipes being used for pickling sample injection acid solution, the upper end of the acid solution service and some institutes are additionally provided with groove
Jet pipe is stated to connect.
Based on the above technical solutions, the utility model can also have following further improvement.
Further, the eo-acid prepares sulfuric acid addition pipeline, the hydrogen fluorine that pipeline group includes connecting with the circulating tank respectively
Acid addition pipeline, industry water addition pipeline and additive addition pipeline (additive is conventional pickling additive).Eo-acid is set
Pipeline group is prepared, can flexibly select the dosage of various components, can very easily make the new acid solution of various specific compositions.
Further, the addition tank for storing hydrogen peroxide solution is further included, the bottom of the addition tank is added by hydrogen peroxide
Pipeline is added to be connected with the acid solution reflux line.Acid solution reflux line connection hydrogen peroxide addition pipeline, can make hydrogen peroxide solution straight
It is connected in acid solution reflux line and is mixed with acid solution, mixing efficiency is high.
Further, the waste liquid discharge line, which is equipped with, is used to make the crystallizer discharged after waste liquid crystallization.Acid pickle discharges
When, crystallizer is first passed through, the heavy metallic salt in spent acid is separated by crystallization with spent acid, can be made in discharge spent acid without weight
Metal ion, the more environmentally-friendly and heavy metallic salt that crystallizes out also recoverable.
Further, the circulating tank is equipped with the potentiometer for detecting its interior acid solution oxidation-reduction potential.Can by potentiometer
The oxidation-reduction potential of acid solution in circulating tank is obtained in real time, can meet requirement in experiment to the oxidation-reduction potential of acid solution simultaneously
Instruct the preparation of acid solution.
Further, the acid solution service between the thermostat and the descaling bath is equipped with and the circulating tank
The reflux branch pipe of connection.Acid solution when pickle is just begun to warm up, first passes through reflux branch by oven heated to pickling temperature
Pickle is heated to pickling temperature by the partial circulating that pipe, circulating tank, circulating pump, thermostat are formed.
Further, the open top periphery of the descaling bath is surrounded with the seal groove being filled with water, and is placed with the seal groove
For closing the open-topped capping of the descaling bath, the side wall upper part of the descaling bath is connected with acid mist emission pipeline.
Further, the sample fixing bracket is vertically arranged and its lower end is fixedly connected with the bottom wall of the descaling bath, institute
The support bracket fastened upper end of sample is stated to be used to fix acid-washing stainless steel sample, the top both sides and bottom of the acid-washing stainless steel sample
Both sides are respectively arranged with the jet pipe.
Compared with prior art, the beneficial effects of the utility model are：The experimental provision by beaker with carrying out stainless steel
Acid washing test has essential difference, and the situation of stainless steel surface contact acid solution (passes through spray when it can simulate pickling in actual production
Pipe inspection acid solution acts on stainless steel surface), the acid dip pickle of design can be in the preferable simulation actual production in laboratory, so as to obtain
The experimental result gone out can preferably instruct actual production.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the stainless steel provided by the utility model without nitric acid fountain acid washing test device.
In attached drawing, parts list represented by the reference numerals is as follows：
1. crystallizer；2. circulating tank；3. control valve one；4. control valve two；5. circulating pump；6. thermostat；7. control valve three；
8. control valve four；9. acid solution service；10. acid solution reflux line；11. control valve four；12. add tank；13. capping；It is 14. close
Sealing groove；15. acid mist emission pipeline；Jet pipe on 16.；17. acid-washing stainless steel sample；18. descaling bath；19. lower jet pipe；20. sample
Fixed frame；21. potentiometer；22. sulfuric acid adds pipeline；23. hydrofluoric acid adds pipeline；24. industry water adds pipeline；25. addition
Pipeline is added in agent.
Embodiment
The principle and feature of the utility model are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
In the description of the utility model, term " interior ", " outer ", " longitudinal direction ", " transverse direction ", " on ", " under ", " top ", " bottom "
Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this practicality newly
Type rather than require the utility model must be with specific azimuth configuration and operation, therefore be not construed as to the utility model
Limitation.
As shown in Figure 1, the utility model provides a kind of immersion type stainless steel without nitric acid fountain pickling experimental provision, it is wrapped
Include：Circulating tank 2, acid solution service 9, descaling bath 18 and acid solution reflux line 10 including sequential communication successively, the acid solution
Service 9 is equipped with circulating pump 5 and thermostat 6, the upper end of the acid solution reflux line 10 and the bottom of the descaling bath 18
Connection, the lower end of the acid solution reflux line 10 are connected with the circulating tank 2, and the circulating tank 2 also prepares pipeline group with eo-acid
Connection, the bottom of the circulating tank 2 are equipped with acid solution outlet and waste liquid outlet, the acid solution outlet and the acid solution service 9
Lower end connection, the waste liquid outlet connects with waste liquid discharge line, is provided with the descaling bath 18 and is used to fix stainless steel
The sample fixing bracket 20 of pickling sample 17, is additionally provided with the descaling bath 18 and some is used to spray acid solution to the pickling sample
Jet pipe, the upper end of the acid solution service 9 is connected with some jet pipes.
Capping 13 is placed in seal groove 14, and by watertight pickling bath 18, acid mist emission passes through acid mist emission pipeline 15
Discharge.
Sample fixing bracket 20 is fixed on 18 bottom of acid tank, and the top of sample fixing bracket 20 can install acid-washing stainless steel sample
17。
Thermostat 6 is installed on acid solution service 9, and the acid solution in descaling bath 18 is heated to pickling temperature by thermostat 6
Degree, when pickle is just begun to warm up, first passes through partial circulating (i.e. acid solution walk to flow back branch pipe enter circulating tank) and is heated to pickle
Pickling temperature.
Hydrogen peroxide solution is transported to acid solution reflux line 10 by adding tank 12 and is mixed with pickle, hydrogen peroxide in pickle
The addition of solution, can specifically be adjusted, potentiometer 21 is installed on circulating tank 2 according to measurement redox reaction current potential size
In.
Eo-acid by acid solution with tubing giving sufficient strength (including sulfuric acid add pipeline 22, hydrofluoric acid add pipeline 23, industry water adding tube
Road 24, additive addition pipeline 25) it is added in circulating tank 2, then acid solution is transported to descaling bath 18 by acid solution service 9
In upper jet pipe 16 and lower jet pipe 19 (i.e. jet pipe includes upper jet pipe 16 and lower jet pipe 19), acid solution is sprayed by upper and lower jet pipe 16 and 19
To 17 upper and lower surface of pickling sample, acid solution is back in circulating tank 2 by acid solution reflux line 10 again.
Crystallizer 1 is connected with spent acid discharge tube, and when spent acid discharges, spent acid first passes through crystallizer 1, makes the huge sum of money in spent acid
Belong to salt to separate with spent acid by crystallization, can make to be free of heavy metal ion in discharge spent acid.
It is understood that it is necessary that some should be equipped with the corresponding pipeline of above-mentioned experimental provision provided by the utility model
Control valve to realize its function and flexible modulation acid solution flow, specifically：Waste liquid discharge line is equipped with control valve 1, follows
The acid solution service that ring is pumped between circulating tank is equipped with control valve 24, and reflux branch pipe is equipped with control valve 37, thermostat
Acid solution service between descaling bath is equipped with control valve 48, and hydrogen peroxide addition pipeline is equipped with control valve 11.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within new spirit and principle, any modification, equivalent replacement, improvement and so on, should be included in the guarantor of the utility model
Within the scope of shield.
Claims (8)
1. a kind of stainless steel is without nitric acid fountain acid washing test device, it is characterised in that includes the circulating tank of sequential communication successively
(2), acid solution service (9), descaling bath (18) and acid solution reflux line (10), the acid solution service (9) are equipped with and follow
Ring pumps (5) and thermostat (6), and the upper end of the acid solution reflux line (10) is connected with the bottom of the descaling bath (18), described
The lower end of acid solution reflux line (10) is connected with the circulating tank (2), and the circulating tank (2) is also prepared pipeline group with eo-acid and connected
Logical, the bottom of the circulating tank (2) is equipped with acid solution outlet and waste liquid outlet, the acid solution outlet and the acid solution service
(9) lower end connection, the waste liquid outlet are connected with waste liquid discharge line, are provided with the descaling bath (18) for fixing not
The sample fixing bracket (20) of rust steel pickling sample (17), the descaling bath (18) is interior to be additionally provided with some be used for pickling examination
Sample sprays the jet pipe of acid solution, and the upper end of the acid solution service (9) is connected with some jet pipes.
2. a kind of stainless steel according to claim 1 is without nitric acid fountain acid washing test device, it is characterised in that described new
The sulfuric acid that acid prepares pipeline group and includes connecting with the circulating tank (2) respectively adds pipeline (22), hydrofluoric acid adds pipeline (23),
Industry water addition pipeline (24) and additive addition pipeline (25).
3. a kind of stainless steel according to claim 1 is without nitric acid fountain acid washing test device, it is characterised in that further includes
For storing the addition tank (12) of hydrogen peroxide solution, pipeline and the acid are added in the bottom of the addition tank (12) by hydrogen peroxide
Liquid reflux line (10) connects.
4. a kind of stainless steel according to claim 1 is without nitric acid fountain acid washing test device, it is characterised in that described useless
Liquid discharge line, which is equipped with, to be used to make the crystallizer (1) discharged after waste liquid crystallization.
5. a kind of stainless steel according to claim 1 is without nitric acid fountain acid washing test device, it is characterised in that described to follow
Ring tank (2) is equipped with the potentiometer (21) for detecting its interior acid solution oxidation-reduction potential.
6. a kind of stainless steel according to claim 1 is without nitric acid fountain acid washing test device, it is characterised in that the perseverance
The acid solution service (9) between warm device (6) and the descaling bath (18) is equipped with time connected with the circulating tank (2)
Flow branch pipe.
7. a kind of stainless steel according to any one of claims 1 to 6 exists without nitric acid fountain acid washing test device, its feature
In the open top periphery of the descaling bath (18) is surrounded with the seal groove (14) being filled with water, and is placed with the seal groove (14)
For closing the descaling bath (18) open-topped capping (13), side wall upper part and the acid mist emission pipe of the descaling bath (18)
Road (15) connects.
8. a kind of stainless steel according to claim 7 is without nitric acid fountain acid washing test device, it is characterised in that the examination
Sample fixing bracket (20) is vertically arranged and its lower end is fixedly connected with the bottom wall of the descaling bath (18), the sample fixing bracket
(20) upper end is used to fix acid-washing stainless steel sample (17), the top both sides and bottom two of the acid-washing stainless steel sample (17)
Side is respectively arranged with the jet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720995927.2U CN207276725U (en) | 2017-08-08 | 2017-08-08 | A kind of stainless steel is without nitric acid fountain acid washing test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720995927.2U CN207276725U (en) | 2017-08-08 | 2017-08-08 | A kind of stainless steel is without nitric acid fountain acid washing test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207276725U true CN207276725U (en) | 2018-04-27 |
Family
ID=61987113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720995927.2U Expired - Fee Related CN207276725U (en) | 2017-08-08 | 2017-08-08 | A kind of stainless steel is without nitric acid fountain acid washing test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207276725U (en) |
-
2017
- 2017-08-08 CN CN201720995927.2U patent/CN207276725U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20210808 |