CN218755115U - Stainless steel pickling waste liquid treatment device - Google Patents
Stainless steel pickling waste liquid treatment device Download PDFInfo
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- CN218755115U CN218755115U CN202222996710.7U CN202222996710U CN218755115U CN 218755115 U CN218755115 U CN 218755115U CN 202222996710 U CN202222996710 U CN 202222996710U CN 218755115 U CN218755115 U CN 218755115U
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- 239000007788 liquid Substances 0.000 title claims abstract description 64
- 239000002699 waste material Substances 0.000 title claims abstract description 41
- 239000010935 stainless steel Substances 0.000 title claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 26
- 238000011282 treatment Methods 0.000 title claims abstract description 16
- 238000005554 pickling Methods 0.000 title claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 32
- 239000012141 concentrate Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 21
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 21
- 238000004140 cleaning Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 9
- 239000000047 product Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000004690 nonahydrates Chemical class 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XWROUVVQGRRRMF-UHFFFAOYSA-N F.O[N+]([O-])=O Chemical compound F.O[N+]([O-])=O XWROUVVQGRRRMF-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006115 defluorination reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052935 jarosite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- DGCPSAFMAXHHDM-UHFFFAOYSA-N sulfuric acid;hydrofluoride Chemical compound F.OS(O)(=O)=O DGCPSAFMAXHHDM-UHFFFAOYSA-N 0.000 description 1
Images
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The utility model provides a stainless steel pickling waste liquid processing apparatus, including pre-heater, evaporimeter, flash tank, concentrate pans, slicer, condenser, buffer tank, liquid ring vacuum pump, circulating pump and recovery acid tank. The treatment device treats the raw material waste liquid to obtain a ferric nitrate nonahydrate product, and the byproduct dilute nitric acid can be directly used, so that the resource utilization of the raw material waste acid is realized. The treatment device realizes continuous automatic operation, has low operating cost and does not generate secondary pollutants. Is suitable for treating waste liquid generated in the nitric acid cleaning process of stainless steel.
Description
Technical Field
The utility model relates to a chemical industry environmental protection field, concretely relates to stainless steel pickling waste liquid treatment device.
Technical Field
In order to clean the surface and resist corrosion, the stainless steel product is cleaned by sulfuric acid or sulfuric acid-hydrofluoric acid mixed acid to remove black oxide scale and then cleaned by nitric acid for the second time, so that an oxide film is formed on the surface of the stainless steel and the surface smoothness is improved. This process produces a large amount of spent cleaning acid. The existing method for treating the waste acid liquid mainly comprises the following steps: alkali neutralization precipitation method, low temperature crystallization method, concentration crystallization method, etc.
CN108793568A discloses a stainless steel acid-containing cleaning wastewater zero-discharge wastewater combined equipment, which is characterized in that a stainless steel cleaning waste acid source liquid is put into a stainless steel cleaning wastewater collecting tank, and the stainless steel cleaning waste acid source liquid is pumped into a first integrated settling system for primary treatment; the treated stainless steel cleaning waste acid source liquid enters a waste acid liquid concentration and separation system through a first bag filter and a waste acid liquid buffer tank for treatment; the concentrated solution is sent to a system for recovering nickel and chromium by electrolysis under the action of a high-pressure pump; supernatant obtained by the electrolyzed waste acid solution through the second integrated settling system enters a supernatant collection box; the supernatant enters a high-pressure concentration system for treatment through the produced water of the resin adsorption system; and the high-concentration liquid of the high-pressure concentration system enters an evaporative crystallization system. Realizing the recycling and reusing of the stainless steel acid-containing cleaning wastewater. The treatment of waste pickling liquid of alloy steel with nitric acid and hydrofluoric acid introduces a method for reasonably treating alloy steel HNO 3 -process scheme of HF pickling waste liquid. Recovering nitric acid-hydrofluoric acid from the waste liquid through TBP multistage extraction; removing iron and chromium from the sodium jarosite; neutralizing and depositing nickel; after the calcium salt defluorination treatment, part of HNO is recovered 3 HF and about 96 percent of nickel, and the effluent is colorless and transparent and reaches the national discharge standard. The invention carries out resource treatment on the nitric acid cleaning waste acid liquid in the stainless steel cleaning waste acid, and recovers nitric acid and ferric nitrate to be respectively utilized, thereby obtaining better economic and social benefits.
Disclosure of Invention
In order to solve the problem, the utility model discloses a be applicable to handle and carry out the apparatus for producing of stainless steel surface cleaning produced waste acid liquid with nitric acid, the spent acid (being called raw materials waste liquid) that the stainless steel process produced is washd to nitric acid heats to 100 ℃ under the 40KPa condition of absolute pressure, and the dilute nitric acid condensation of evaporation is retrieved, and the concentrate is carried cooling crystallization slicer again and is obtained the ferric nitrate solid product of nonahydrate, can directly be used for producing iron oxide red, realizes the utilization. The utility model discloses heat the raw materials spent acid with the evaporimeter condensate waste heat, realize the negative pressure distillation with the vacuum that the liquid ring vacuum pump produced, reduced the running cost. The operation is simplified by the measures of arranging a steam pressure control loop, a concentrator temperature control loop and the like, and the continuous operation of the device is realized.
The specific scheme is as follows:
the utility model provides a stainless steel pickling waste liquid processing apparatus which characterized in that: including pre-heater, evaporimeter, flash tank, concentrate pans, slicer, condenser, buffer tank, liquid ring vacuum pump, circulating pump and recovery acid tank, the pre-heater uses the steam condensate of evaporimeter to preheat the raw and waste liquid and heat up as the heat source, and its export is through pipeline and circulating pump entry linkage, the circulating pump export is connected through the pipeline with the evaporimeter import, the evaporimeter export is through pipe connection to flash tank entry, the export of flash tank upper portion is through pipe connection to condenser upper portion feed inlet, condenser lower part side connects gradually buffer tank and liquid ring vacuum pump through the pipeline, and pipe connection is to recovery acid tank for the export of lower part, the export of flash tank bottom passes through pipe connection with the circulating pump import and realizes the circulation heating of waste liquid, the export of flash tank side middle part is through pipe connection to concentrate pans, the export of concentrate pans bottom is through pipe connection to the slicer, pipe connection is to recovery acid tank for buffer tank bottom and liquid ring vacuum pump liquid outlet.
Furthermore, the steam outlet of the evaporator is provided with a steam trap and is connected with the inlet pipe of the preheater through a pipeline.
Furthermore, a flow control regulating valve is arranged on a pipeline connecting the outlet of the preheater and the inlet of the circulating pump.
Furthermore, a steam inlet pipeline of the evaporator is provided with a pressure regulating valve for controlling steam pressure and a flow regulating valve for controlling steam flow, the flow regulating valve is controlled by the outlet temperature of the evaporator in a linkage manner, and the control temperature is 100 ℃.
Furthermore, the upper part of the buffer tank is provided with a pressure regulating valve which is controlled by the pressure in the flash tank, and the pressure is controlled to be 40KPa absolute pressure.
Furthermore, a delivery pump and a flow regulating valve are arranged on a pipeline for connecting an outlet at the bottom of the concentrated solution intermediate tank with the slicing machine, and the regulating valve is controlled by a liquid level interlock of the concentrated solution intermediate tank.
Furthermore, the waste gas generated by the concentrated solution intermediate tank, the recovery acid tank and the waste gas pipe of the liquid ring pump is collected and then sent to the nitrogen oxide treatment device.
Further, the working liquid of the liquid ring vacuum pump is water or dilute nitric acid.
Compared with the prior art, the invention has the beneficial effects that: the treatment device treats the raw material waste liquid to obtain a ferric nitrate nonahydrate product, and the byproduct dilute nitric acid can be directly used, so that the resource utilization of the raw material waste acid is realized. The treatment device realizes continuous automatic operation, has low operating cost and does not produce secondary pollutants. Is suitable for treating waste liquid generated in the nitric acid cleaning process of stainless steel.
Drawings
FIG. 1 is a schematic diagram of the present invention.
List of reference numerals:
1. a preheater; 2. an evaporator; 3. a circulation pump; 4. a flash tank; 5. a condenser; 6. a concentrated solution intermediate tank; 7. slicing machine; 8. recovering the acid tank; 9. a buffer tank; 10. liquid ring vacuum pump.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
As shown in the figure, a stainless steel pickling waste liquid processing apparatus, including pre-heater 1, evaporimeter 2, flash tank 4, concentrate pans 6, slicer 7, condenser 5, buffer tank 9, liquid ring vacuum pump 10, circulating pump 3 and recovery acid jar 8, the pre-heater uses the steam condensate of evaporimeter to preheat the raw materials waste liquid for the heat source and intensifies, and its export is through pipeline and circulating pump entry linkage, the circulating pump export is connected through the pipeline with the evaporimeter import, the evaporimeter export is through pipe connection to flash tank entry, the export of flash tank upper portion is through pipe connection to condenser upper portion feed inlet, buffer tank and liquid ring vacuum pump are connected gradually through the pipeline to condenser lower part side, and the pipe connection is retrieved the acid jar for the export of lower part, flash tank bottom export is through pipe connection with the circulating pump import and is realized the circulation heating of waste liquid, the export of flash tank side middle part is through pipe connection to concentrate pans, the export of concentrate pans bottom passes through pipe connection to the slicer, buffer tank bottom and liquid ring vacuum pump liquid outlet for the liquid ring vacuum pump pipe connection is retrieved the acid jar.
Stainless steel nitric acid cleaning waste liquid containing nitric acid and ferric nitrate is subjected to cyclic heating and flash evaporation concentration to a certain concentration, then is cooled, crystallized and sliced to obtain a solid ferric nitrate nonahydrate product, and continuous low-cost operation of the device is realized through technical measures such as waste heat utilization, linkage control and the like. The device is formed by connecting main equipment such as a circulating pump, a heater, a flash tank and a slicing machine and auxiliary equipment such as a heat exchanger, a liquid ring vacuum pump and a middle storage tank. This processing apparatus realizes continuous steady operation, and the ferric nitrate product of nonahydrate that obtains can be used to a plurality of fields such as production iron oxide red, catalyst, mordant, and the dilute nitric acid that obtains can directly utilize, realizes the resource utilization of nitric acid cleaning waste liquid.
In this embodiment, the evaporator steam outlet is equipped with a steam trap and is connected to the inlet of the preheater by a pipe.
In this embodiment, a flow control regulating valve is installed on the pipeline connecting the outlet of the preheater and the inlet of the circulating pump.
In this embodiment, the steam inlet pipeline of the evaporator is provided with a pressure regulating valve for controlling steam pressure and a flow regulating valve for controlling steam flow, and the flow regulating valve is controlled by the outlet temperature of the evaporator in an interlocking manner, and the control temperature is 100 ℃.
In the embodiment, the upper part of the buffer tank is provided with a pressure regulating valve, the pressure regulating valve is controlled by the pressure in the flash tank, and the control pressure is 40KPa absolute pressure.
In the embodiment, a pipeline for connecting the outlet at the bottom of the concentrated solution intermediate tank with the slicing machine is provided with a delivery pump and a flow regulating valve, and the regulating valve is controlled by a liquid level interlock of the concentrated solution intermediate tank.
In this embodiment, the exhaust gas generated by the concentrated solution intermediate tank, the recovery acid tank and the exhaust pipe of the liquid ring pump is collected and sent to the nitrogen oxide treatment device.
In this embodiment, the working fluid of the liquid ring vacuum pump is water or dilute nitric acid.
Examples
Preheating raw material waste liquid generated in the stainless steel nitric acid pickling process through a preheater, pumping the raw material waste liquid into an evaporator through a circulating pump according to a control flow, setting the outlet temperature of the evaporator at 100 ℃, adjusting the opening of a steam flow regulating valve through a control loop, starting a liquid ring vacuum pump, controlling the pressure in a flash tank to be 40KPa absolute pressure, and condensing evaporated dilute nitric acid through a condenser and then feeding the condensed dilute nitric acid into an acid recovery tank. And overflowing the concentrated waste liquid into a concentrated liquid intermediate tank, conveying the concentrated liquid intermediate tank to a slicing machine by a pump, and condensing, crystallizing and slicing to obtain a ferric nitrate nonahydrate product. Dilute nitric acid can be directly utilized, and the nitrogen oxide waste gas collected by the system enters a nitrogen oxide absorption device for additional treatment.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (5)
1. The utility model provides a stainless steel pickling waste liquid processing apparatus which characterized in that: including pre-heater, evaporimeter, flash tank, concentrate pans, slicer, condenser, buffer tank, liquid ring vacuum pump, circulating pump and recovery acid tank, the pre-heater uses the steam condensate of evaporimeter to preheat the raw materials waste liquid for the heat source and intensifies, and its export is through pipeline and circulating pump entry linkage, the circulating pump export is connected through the pipeline with the evaporimeter import, the evaporimeter export is through pipe connection to flash tank entry, flash tank upper portion export is through pipe connection to condenser upper portion feed inlet, buffer tank and liquid ring vacuum pump are connected gradually through the pipeline to condenser lower part side, and the pipe connection is retrieved acid tank for the export of lower part, the export of flash tank bottom passes through pipe connection with the circulating pump import, flash tank side middle part export is through pipe connection to concentrate pans, concentrate middle part export is through tank bottom pipe connection to the slicer, buffer tank bottom and liquid ring vacuum pump liquid outlet pipe connection are retrieved acid tank for the liquid ring vacuum pump.
2. The apparatus for treating a waste stainless steel pickling solution according to claim 1, characterized in that: and a flow control regulating valve is arranged on a pipeline connecting the outlet of the preheater and the inlet of the circulating pump.
3. The apparatus for treating a waste stainless steel pickling solution according to claim 1, characterized in that: the steam inlet pipeline of the evaporator is provided with a pressure regulating valve for controlling steam pressure and a flow regulating valve for controlling steam flow, the flow regulating valve is controlled by the outlet temperature of the evaporator in a linkage manner, and the control temperature is 100 ℃.
4. The stainless steel pickling waste liquid treatment device according to claim 1, characterized in that: and the upper part of the buffer tank is provided with a pressure regulating valve which is controlled by the pressure in the flash tank and the pressure is controlled to be 40KPa absolute pressure.
5. The apparatus for treating a waste stainless steel pickling solution according to claim 1, characterized in that: and a conveying pump and a flow regulating valve are arranged on a pipeline for connecting an outlet at the bottom of the concentrated solution intermediate tank with the slicing machine, and the regulating valve is controlled by liquid level interlocking of the concentrated solution intermediate tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222996710.7U CN218755115U (en) | 2022-11-10 | 2022-11-10 | Stainless steel pickling waste liquid treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222996710.7U CN218755115U (en) | 2022-11-10 | 2022-11-10 | Stainless steel pickling waste liquid treatment device |
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| Publication Number | Publication Date |
|---|---|
| CN218755115U true CN218755115U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222996710.7U Active CN218755115U (en) | 2022-11-10 | 2022-11-10 | Stainless steel pickling waste liquid treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116588906A (en) * | 2023-06-02 | 2023-08-15 | 深圳瑞赛环保科技有限公司 | Waste nitric acid in-situ recycling device, nitric acid recovery method and heavy metal separation method |
-
2022
- 2022-11-10 CN CN202222996710.7U patent/CN218755115U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116588906A (en) * | 2023-06-02 | 2023-08-15 | 深圳瑞赛环保科技有限公司 | Waste nitric acid in-situ recycling device, nitric acid recovery method and heavy metal separation method |
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