CN111333206A - Zinc-containing waste acid solution treatment method and treatment system - Google Patents
Zinc-containing waste acid solution treatment method and treatment system Download PDFInfo
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- CN111333206A CN111333206A CN202010247332.5A CN202010247332A CN111333206A CN 111333206 A CN111333206 A CN 111333206A CN 202010247332 A CN202010247332 A CN 202010247332A CN 111333206 A CN111333206 A CN 111333206A
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- zinc
- acid solution
- waste acid
- containing waste
- reaction tank
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000011701 zinc Substances 0.000 title claims abstract description 93
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 93
- 239000002253 acid Substances 0.000 title claims abstract description 86
- 239000002699 waste material Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000243 solution Substances 0.000 claims abstract description 101
- 238000006243 chemical reaction Methods 0.000 claims abstract description 76
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 75
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 35
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 35
- 238000007747 plating Methods 0.000 claims abstract description 28
- 239000011259 mixed solution Substances 0.000 claims abstract description 27
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims abstract description 18
- 239000002244 precipitate Substances 0.000 claims abstract description 15
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims abstract description 13
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims abstract description 13
- 229940007718 zinc hydroxide Drugs 0.000 claims abstract description 13
- 229960004887 ferric hydroxide Drugs 0.000 claims abstract description 12
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims abstract description 12
- 235000005074 zinc chloride Nutrition 0.000 claims abstract description 9
- 239000011592 zinc chloride Substances 0.000 claims abstract description 9
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 claims abstract description 8
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000011001 backwashing Methods 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- -1 iron ion Chemical class 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- FLTRNWIFKITPIO-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe] FLTRNWIFKITPIO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a zinc-containing waste acid solution treatment method and a treatment system, which comprise the following steps: s10: providing a reaction tank (10), and adding a zinc-containing waste acid solution into the reaction tank (10), wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride; s20: adding hydrogen peroxide and ammonia water into a reaction tank (10) to form a mixed solution; s30: after the zinc-containing waste acid solution is fully reacted and oxidized in the reaction tank (10), zinc hydroxide and ferric hydroxide precipitates are formed; s40: and filtering the zinc-containing waste acid solution after full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered, and the residual solution is used as a plating assistant. The treatment method can convert the zinc-containing waste acid solution into the plating assistant agent, greatly reduces the treatment cost of the zinc-containing waste acid solution, is convenient to treat, and recycles resources.
Description
Technical Field
The invention relates to the field of zinc-containing waste acid solution treatment, in particular to a zinc-containing waste acid solution treatment method and a zinc-containing waste acid solution treatment system.
Background
The pretreatment is a key process for cleaning the surface of a hot-dip galvanized workpiece, and in the whole galvanizing pretreatment process, four conventional processes of acid washing, high acid, rinsing and plating assisting are counted, wherein a zinc stripping pool is mainly used for back washing a plated lifting appliance or a back plated part, so that the zinc and iron contents in a zinc stripping pool solution are high, and the zinc content in the zinc stripping pool solution is over 400g/L and the iron ion content is about 50g/L because the zinc stripping pool solution is mainly used for back washing the plated lifting appliance or the back plated part, so that the zinc content in the zinc stripping pool solution is about 3000 yuan/ton, for example, a factory requires that the treatment unit price is about 3000 yuan/ton, and the treatment price of 100 tons of solution is about 30 ten thousand yuan, so that the treatment cost is high.
Disclosure of Invention
The invention aims to solve one of the problems in the prior art, and an object of the invention is to provide a zinc-containing waste acid solution treatment method, which can convert the zinc-containing waste acid solution into a plating assistant agent, greatly reduce the treatment cost of the zinc-containing waste acid solution, and has the advantages of convenient treatment and resource recycling.
Another object of the present invention is to propose a zinc containing spent acid solution treatment system.
The method for treating the waste acid solution containing zinc according to the first aspect of the invention comprises the following steps:
s10: providing a reaction tank, and adding a zinc-containing waste acid solution into the reaction tank, wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
s20: adding hydrogen peroxide and ammonia water into the reaction tank to form a mixed solution;
s30: after the zinc-containing waste acid solution is fully reacted and oxidized in the reaction tank, zinc hydroxide and ferric hydroxide precipitates are formed;
s40: and filtering the zinc-containing waste acid solution after full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered, and the residual solution is used as a plating assistant.
Specifically, the zinc-containing waste acid solution in the backwashing pool can be converted into the plating assistant agent by the treatment method, so that resources are reasonably utilized, and the treatment method can greatly reduce the treatment cost of the zinc-containing waste acid solution and is convenient to treat.
In addition, the zinc-containing waste acid solution treatment method can also have the following technical characteristics:
in an example of the present invention, the step S20 further comprises aerating the mixed solution in the reaction tank to allow the waste acid solution containing zinc to be sufficiently reacted.
In one example of the present invention, step S30 further includes adding an antifoaming agent to the mixed solution.
In one example of the present invention, step S30 further includes adding a flocculant to the mixed solution.
A spent zinciferous waste acid solution treatment system according to a second aspect of the present invention comprises:
a reaction tank;
the backwashing pool is connected with the reaction pool and used for storing zinc-containing waste acid solution, wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
the hydrogen peroxide tank and the ammonia water tank are respectively connected with the reaction tank and are respectively used for storing hydrogen peroxide and ammonia water;
and the filter press is connected with the reaction tank and is used for filtering the zinc-containing waste acid solution subjected to full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered out.
In one example of the present invention, the method further comprises:
and the air compressor is communicated with the reaction tank and is used for aerating the mixed solution after the hydrogen peroxide, the ammonia water and the zinc-containing waste acid solution are mixed so as to ensure that the zinc-containing waste acid solution is fully reacted.
In one example of the present invention, the method further comprises:
and the pump bodies are respectively connected between the reaction tank and the ammonia water tanks, between the reaction tank and the hydrogen peroxide tanks, and between the backwashing tank and the reaction tank, and are respectively used for pumping ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank.
In one example of the present invention, the method further comprises: a controller for controlling the operation of the electronic device,
the controller is coupled with the pump body and is used for controlling the pumping amount of ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank;
the controller is coupled with the air compressor and used for controlling the start and stop of the air compressor.
In one example of the present invention, the method further comprises:
and the storage pool is connected with the filter press and is used for storing the filtered mixed solution.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
Fig. 1 is a schematic structural view of a spent zinc acid solution treatment system according to an embodiment of the present invention.
Reference numerals:
a reaction tank 10;
a hydrogen peroxide tank 20;
an ammonia tank 30;
a backwash tank 40;
an air compressor 50;
a filter press 60;
a holding tank 70.
Detailed Description
The invention will be further explained with reference to the drawings.
The following description is provided with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the invention as defined by the claims. It includes various specific details to assist in this understanding, but these details should be construed as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that changes and modifications of the various embodiments described herein can be made without departing from the scope of the invention, which is defined by the appended claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
The method for treating the waste acid solution containing zinc according to the first aspect of the invention comprises the following steps:
s10: providing a reaction tank 10, and adding a zinc-containing waste acid solution into the reaction tank 10, wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
s20: adding hydrogen peroxide and ammonia water into the reaction tank 10 to form a mixed solution;
s30: after the zinc-containing waste acid solution is fully reacted and oxidized in the reaction tank 10, zinc hydroxide and ferric hydroxide precipitates are formed;
s40: and filtering the zinc-containing waste acid solution after full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered, and the residual solution is used as a plating assistant.
The treatment method is described below by a specific experimental procedure:
description of the content of the solution in the zinc stripping tank:
as can be seen from the graph, the pH value of the zinc stripping pool solution is low and is in a strong acidic state.
The experimental steps are as follows:
① the experimental purpose is that ammonia water is used to adjust the PH value of the solution to 3-5 to meet the requirement of the plating assistant agent and generate ammonium chloride.
② Experimental procedures
And (3) adding a proper amount of ammonia water into 500mL of zinc stripping pool solution, adjusting the pH value to be about 3, reading the total solution solvent, and calculating the addition amount of the ammonia water to be 68 mL.
Adding appropriate hydrogen peroxide (using a graduated beaker) until no ferric ion precipitate is precipitated, and reading out that the addition amount of the hydrogen peroxide is 45 mL.
The precipitate was filtered off using a vacuum filter and the solution was subjected to content measurement.
According to pictures and experiments, the solution after filter pressing is in a colorless state.
According to the data of the test, the plating assistant agent is a high-concentration plating assistant agent on the whole and needs to be diluted by water for use.
Cost comparison
(ii) cost of solution conversion
According to the experimental content, 68mL of ammonia water and 45mL of hydrogen peroxide are added in total to convert the zinc stripping pool solution into the plating assistant.
According to the chart, 13.6 tons of ammonia water and 9 tons of hydrogen peroxide are needed for reforming the zinc stripping pool solution, the ammonia water is calculated as 1747 yuan/ton and the hydrogen peroxide is calculated as 2226 yuan/ton, and the total use amount is 43793.2 yuan. In addition, the foam is large in the reaction, 1 ton of defoaming agent is required for defoaming, the foam is 11200 yuan, and the total foam is 54993.2 yuan.
According to the mode, 5.5 ten thousand yuan is expected to be used, and the 'waste acid returned to the plating bath' can be changed into the plating assistant solution.
(II) treatment cost and plating assistant cost
1. Calculated according to the price of processing the waste acid with high zinc content at present, the cost is about 3000 yuan/ton, and the capital consumption is about 30 ten thousand yuan for 100 tons of waste acid.
2. The plating assistant solution with the proportion of 100 tons needs 8.3 tons of zinc chloride and 15 tons of ammonium chloride, wherein the zinc chloride is 12441.17 yuan/ton, the ammonium chloride is 1664 yuan/ton, and the cost is 12.82 ten thousand yuan.
(III) comparison of Overall costs
The whole cost is saved by 37.32 ten thousand yuan according to the treatment of the mode.
Therefore, the treatment method can greatly reduce the treatment cost of the zinc-containing waste acid solution, and the zinc-containing waste acid solution in the backwashing pool 40 can be converted into the plating assistant agent by the treatment method, so that resources are reasonably utilized, and the treatment is convenient.
In an example of the present invention, the step S20 further includes aerating the mixed solution in the reaction tank 10 to fully react the waste acid solution containing zinc, for example, an air compressor 50 may be disposed to aerate the mixed solution, so as to fully react the waste acid solution containing zinc with ammonia water and hydrogen peroxide, thereby improving the efficiency of precipitation and speeding up the reaction.
In one example of the present invention, step S30 further includes adding an antifoaming agent to the mixed solution; the defoaming agent is added to the mixed solution according to the addition of the calculated amount of hydrogen peroxide and ammonia water to remove the foam generated during the reaction, but it is also possible to perform defoaming by spraying through the upper end of the phase reaction tank 10.
In an example of the present invention, step S30 further includes adding a flocculant to the mixed solution, and solid-liquid separation of the mixed solution after sufficient reaction can be achieved by adding the flocculant.
A spent zinciferous waste acid solution treatment system according to a second aspect of the present invention comprises:
a reaction tank 10 having a certain volume for storing the mixed solution;
the backwashing pool 40 is connected with the reaction pool 10 and used for storing zinc-containing waste acid solution, wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
a hydrogen peroxide tank 20 and an ammonia water tank 30 which are respectively connected with the reaction tank 10 and are respectively used for storing hydrogen peroxide and ammonia water;
and a filter press 60 connected to the reaction tank 10 for filtering the zinc-containing waste acid solution after the sufficient reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered.
Specifically, firstly, the zinc-containing waste acid solution in the backwashing tank 40 is injected into the reaction tank 10, then ammonia water and hydrogen peroxide which are quantitatively calculated are added into the reaction tank 10 to form a mixed solution, after the zinc-containing waste acid solution is fully reacted, precipitates of ferric hydroxide and zinc hydroxide are formed in the reaction tank 10, and then the mixed solution after reaction is filtered by a filter press 60 to obtain the plating assistant; the treatment system can convert the zinc-containing waste acid solution in the backwashing pool 40 into the plating assistant agent, so that resources are reasonably utilized, and the treatment system can greatly reduce the treatment cost of the zinc-containing waste acid solution and is convenient to treat. It should be noted that the main chemical reaction equation in the reaction cell 10 is as follows:
and (3) oxidation reaction: 2Fe2++H2O2+2H+＝2Fe3++2H2O
And (3) neutralization reaction: NH (NH)3·H2O+HCL＝NH4CL+H2O
Precipitation reaction: fe3++3OH-＝Fe(OH)3↓
Precipitation reaction: zn2++2OH-＝Fe(OH)2↓
In one example of the present invention, the method further comprises:
and the air compressor 50 is communicated with the reaction tank 10 and is used for aerating the mixed solution after the hydrogen peroxide, the ammonia water and the zinc-containing waste acid solution are mixed so as to ensure that the zinc-containing waste acid solution is fully reacted.
In one example of the present invention, the method further comprises:
the pump bodies are respectively connected between the reaction tank 10 and the ammonia water tank 30, between the reaction tank 10 and the hydrogen peroxide tank 20 and between the backwashing tank 40 and the reaction tank 10, and are respectively used for pumping ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank 10; that is, the ammonia, hydrogen peroxide and the waste acid solution containing zinc in the ammonia tank 30, the hydrogen peroxide tank 20 and the backwash tank 40 can be pumped into the reaction tank 10 through the pump body.
In one example of the present invention, the method further comprises: a controller for controlling the operation of the electronic device,
the controller is coupled with the pump body and is used for controlling the pumping amount of ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank 10;
the controller is coupled with the air compressor 50 and is used for controlling the start and stop of the air compressor 50;
specifically, the controller controls the pump body to inject the zinc-containing waste acid solution in the backwashing tank 40 into the reaction tank 10, then the controller controls the pump body to quantitatively add ammonia water and hydrogen peroxide in the ammonia water tank 30 and the hydrogen peroxide tank 20 into the reaction tank 10 to form a mixed solution, the controller controls the air compressor 50 to be started so that the zinc-containing waste acid solution fully reacts with the ammonia water and the hydrogen peroxide, namely ferrous ions and the hydrogen peroxide are oxidized to form iron ions, the ammonia water and hydrochloric acid are subjected to neutralization reaction, precipitates of iron hydroxide and zinc hydroxide are formed in the reaction tank 10 after the zinc-containing waste acid solution is fully reacted, then the controller controls the filter press 60, and the mixed solution after the reaction is filtered by the filter press 60 to obtain the plating assistant; the treatment system can convert the zinc-containing waste acid solution in the backwashing pool 40 into the plating assistant agent, so that resources are reasonably utilized, and the treatment system can greatly reduce the treatment cost of the zinc-containing waste acid solution and is convenient to treat.
In one example of the present invention, the method further comprises:
the storage tank 70 is connected with the filter press 60 and used for storing the filtered mixed solution, and when the plating assistant agent in the plating assistant tank is insufficient, the plating assistant agent in the storage tank 70 is added into the plating assistant tank; specifically, a pump body may be provided between the storage tank 70 and the plating assistant tank, and the plating assistant agent may be pumped into the plating assistant tank by the pump body.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
Those skilled in the art will appreciate that various features of the various embodiments of the invention described hereinabove may be omitted, added to, or combined in any manner, respectively. Moreover, simple modifications and structural modifications that are adaptive and functional to those skilled in the art are within the scope of the present invention.
While the invention has been shown and described with reference to various embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (9)
1. The method for treating the zinc-containing waste acid solution is characterized by comprising the following steps of:
s10: providing a reaction tank (10), and adding a zinc-containing waste acid solution into the reaction tank (10), wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
s20: adding hydrogen peroxide and ammonia water into a reaction tank (10) to form a mixed solution;
s30: after the zinc-containing waste acid solution is fully reacted and oxidized in the reaction tank (10), zinc hydroxide and ferric hydroxide precipitates are formed;
s40: and filtering the zinc-containing waste acid solution after full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered, and the residual solution is used as a plating assistant.
2. A waste acid solution containing zinc treatment process according to claim 1, characterized in that step S20 further comprises aerating the mixed solution in the reaction tank (10) to fully react the waste acid solution containing zinc.
3. The method of claim 1, further comprising adding an antifoaming agent to the mixed solution in step S30.
4. The zinc containing spent acid solution treatment process of claim 1, further comprising adding a flocculant to the mixed solution in step S30.
5. A zinc-containing spent acid solution treatment system, comprising:
a reaction tank (10);
the backwashing pool (40) is connected with the reaction pool (10) and is used for storing the zinc-containing waste acid solution, wherein the zinc-containing waste acid solution contains ferrous hydroxide and zinc chloride;
the hydrogen peroxide tank (20) and the ammonia water tank (30) are respectively connected with the reaction tank (10) and are respectively used for storing hydrogen peroxide and ammonia water;
and the filter press (60) is connected with the reaction tank (10) and is used for filtering the zinc-containing waste acid solution after full reaction, wherein zinc hydroxide and ferric hydroxide precipitates are filtered out.
6. The spent zinc acid solution treatment system of claim 5, further comprising:
and the air compressor (50) is communicated with the reaction tank (10) and is used for aerating the mixed solution after the hydrogen peroxide, the ammonia water and the zinc-containing waste acid solution are mixed so as to ensure that the zinc-containing waste acid solution is fully reacted.
7. The spent zinc acid solution treatment system of claim 6, further comprising:
the pump bodies are respectively connected between the reaction tank (10) and the ammonia water tanks (30), between the reaction tank (10) and the hydrogen peroxide tanks (20) and between the backwashing pool (40) and the reaction tank (10), and are respectively used for pumping ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank (10).
8. The spent zinc acid solution treatment system of claim 7, further comprising: a controller for controlling the operation of the electronic device,
the controller is coupled with the pump body and is used for controlling the pumping amount of ammonia water, hydrogen peroxide and zinc-containing waste acid solution into the reaction tank (10);
the controller is coupled with the air compressor (50) and used for controlling the start and stop of the air compressor (50).
9. The spent zinc acid solution treatment system of claim 5, further comprising:
and the storage pool (70) is connected with the filter press (60) and is used for storing the filtered mixed solution.
Priority Applications (1)
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| US20060127291A1 (en) * | 2004-12-09 | 2006-06-15 | Abazajian Armen N | High density, high stability, sized metal oxide powder and process for making same |
| CN105132932A (en) * | 2015-08-28 | 2015-12-09 | 新兴铸管股份有限公司 | Reclaiming treatment method of galvanized-part backwashing waste acid liquor |
| CN108754374A (en) * | 2018-08-01 | 2018-11-06 | 唐山正元管业有限公司 | A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash |
| CN212246449U (en) * | 2020-03-31 | 2020-12-29 | 江苏华电铁塔制造有限公司 | Zinc-containing waste acid solution treatment system |
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| US20060127291A1 (en) * | 2004-12-09 | 2006-06-15 | Abazajian Armen N | High density, high stability, sized metal oxide powder and process for making same |
| CN105132932A (en) * | 2015-08-28 | 2015-12-09 | 新兴铸管股份有限公司 | Reclaiming treatment method of galvanized-part backwashing waste acid liquor |
| CN108754374A (en) * | 2018-08-01 | 2018-11-06 | 唐山正元管业有限公司 | A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash |
| CN212246449U (en) * | 2020-03-31 | 2020-12-29 | 江苏华电铁塔制造有限公司 | Zinc-containing waste acid solution treatment system |
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