CN112536007A - Hot galvanizing plating assistant agent and preparation equipment and method thereof - Google Patents
Hot galvanizing plating assistant agent and preparation equipment and method thereof Download PDFInfo
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- CN112536007A CN112536007A CN202011441686.XA CN202011441686A CN112536007A CN 112536007 A CN112536007 A CN 112536007A CN 202011441686 A CN202011441686 A CN 202011441686A CN 112536007 A CN112536007 A CN 112536007A
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- neutralization reaction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- 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
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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Abstract
The invention discloses a hot galvanizing plating assistant agent and preparation equipment and a method thereof. A hot galvanizing plating assistant is prepared from the following raw materials in parts by weight: 100-120 parts of waste hydrochloric acid, 30-40 parts of zinc dust, 6-8 parts of ammonia water, 8-12 parts of hydrogen peroxide, 0.5-0.6 part of defoaming agent and 1-2 parts of PAM aqueous solution; the concentration of the waste hydrochloric acid is 8-10% (mass percent), the zinc dust contains 45-50% (mass percent) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percent), the concentration of the hydrogen peroxide is 28% (mass percent), and the concentration of the PAM aqueous solution is 1 thousandth (mass percent). The plating assistant agent containing zinc chloride of 450-550g/L and ammonium chloride of 150-200g/L is prepared by using zinc dust and waste hydrochloric acid, the consumption of zinc chloride and ammonium chloride in the plating assistant agent in the hot galvanizing production process is reduced, and the hazardous waste treatment cost of enterprises and the production cost of hot galvanizing zinc-plated parts are reduced.
Description
Technical Field
The invention relates to a hot galvanizing material and the technical field of material preparation. In particular to a hot galvanizing plating assistant agent and preparation equipment and a method thereof. -
Background
Zinc dust (containing 45-50% of zinc oxide) generated in the hot galvanizing procedure is valuable and dangerous waste, and the current main treatment mode is to transfer the zinc dust to a qualified third party for treatment; the concentration of the waste hydrochloric acid after the casting acid washing is 8-10%, the waste hydrochloric acid contains high-concentration ferrous ions (the content is 90-100g/L), acid-base neutralization treatment is mostly adopted for discharging, the acid-base neutralization treatment of the waste hydrochloric acid after the casting acid washing can generate a large amount of sludge and high-salt-containing waste water dangerous waste, the high-salt-containing waste water needs high-cost evaporation treatment, the treatment cost of the sludge and the high-salt-containing waste water dangerous waste is high, and the economic burden of an enterprise is large; meanwhile, the liquid plating assistant agent in the hot galvanizing procedure needs to maintain certain zinc chloride concentration and ammonium chloride concentration, and zinc chloride and ammonium chloride in powder solid state need to be continuously supplemented along with the loss of the zinc chloride and the ammonium chloride in the liquid plating assistant agent in the hot galvanizing production process so as to maintain the zinc chloride concentration and the ammonium chloride concentration required by normal production in the liquid plating assistant agent. How to realize the comprehensive recycling of zinc dust and waste hydrochloric acid, the zinc dust and the waste hydrochloric acid are used for preparing a hot galvanizing plating assistant containing zinc chloride and ammonium chloride, the zinc dust and the waste hydrochloric acid are changed into valuable, the environment is protected, and the hazardous waste treatment cost of enterprises is reduced; the solid consumption of zinc chloride and ammonium chloride powder in the plating assistant agent in the hot galvanizing production process is reduced, and the production cost of hot galvanizing zinc-plated parts is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a hot galvanizing plating assistant agent; the invention aims to solve another technical problem that: provides a preparation device and a preparation method of a hot galvanizing plating assistant agent. The zinc chloride and ammonium chloride containing hot galvanizing plating assistant prepared by using the zinc dust and the waste hydrochloric acid can change the zinc dust and the waste hydrochloric acid into valuable, protect the environment and reduce the treatment cost of hazardous wastes of enterprises; the solid consumption of zinc chloride and ammonium chloride powder in the plating assistant agent in the hot galvanizing production process can be reduced, and the production cost of hot galvanizing zinc-plated parts is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: a hot galvanizing plating assistant agent is characterized in that: the hot galvanizing plating assistant agent is prepared from the following raw materials in parts by weight: 100-120 parts of waste hydrochloric acid, 30-40 parts of zinc dust, 6-8 parts of ammonia water, 8-12 parts of hydrogen peroxide, 0.5-0.6 part of defoaming agent and 1-2 parts of PAM aqueous solution; the waste hydrochloric acid is clean waste hydrochloric acid prepared by filtering after pickling castings, the concentration of the waste hydrochloric acid is 8-10% (mass percent), the zinc dust contains 45-50% (mass percent) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percent), the concentration of hydrogen peroxide is 28% (mass percent), and the concentration of the PAM aqueous solution is 1 ‰ (mass percent);
a preparation device of a hot galvanizing plating assistant agent is characterized in that: the device comprises a neutralization reaction tank arranged on a steel-concrete platform, a plating assistant agent finished product tank arranged on the steel-concrete platform on the left side of the neutralization reaction tank, an aeration working assembly consisting of a valve, an air duct and a diaphragm tubular microporous aerator and arranged on the top surface of the bottom of the neutralization reaction tank arranged on the steel-concrete platform, and an immersion PH on-line monitor arranged on the position close to the left tank wall of the neutralization reaction tank; the system also comprises a waste hydrochloric acid storage tank, an industrial ammonia water storage tank and a hydrogen peroxide storage tank which are sequentially arranged on a steel-concrete floor on the right side of the neutralization reaction tank, and also comprises a defoaming agent storage barrel, a PAM aqueous solution storage barrel, a zinc dust storage bin and a zinc dust storage bin mounting bracket, wherein the zinc dust storage bin mounting bracket is arranged on the steel-concrete floor on the rear side of the neutralization reaction tank, and the zinc dust storage bin is arranged on the zinc dust storage bin mounting bracket; the waste hydrochloric acid conveying device comprises a waste hydrochloric acid conveying pipeline, a waste hydrochloric acid conveying pipeline mounting support and a waste hydrochloric acid pneumatic diaphragm pump, the waste hydrochloric acid conveying pipeline mounting support is mounted on a steel concrete platform between the neutralization reaction tank and the waste hydrochloric acid storage tank, the waste hydrochloric acid conveying pipeline is mounted on the waste hydrochloric acid conveying pipeline mounting support, one end of the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support extends into the waste hydrochloric acid storage tank at a position close to the bottom of the waste hydrochloric acid storage tank, the other end of the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support extends into the neutralization reaction tank, and the waste hydrochloric acid pneumatic diaphragm pump is further mounted on the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support;
the industrial ammonia water conveying device comprises an industrial ammonia water conveying pipeline, a hydrochloric acid conveying pipeline mounting support and an industrial ammonia water pneumatic diaphragm pump, wherein the industrial ammonia water conveying pipeline mounting support is mounted on a steel-concrete floor between a neutralization reaction tank and an industrial ammonia water storage tank;
the hydrogen peroxide conveying device comprises a hydrogen peroxide conveying pipeline, a hydrochloric acid conveying pipeline mounting support and a hydrogen peroxide pneumatic diaphragm pump, wherein the hydrogen peroxide conveying pipeline mounting support is mounted on a steel concrete floor between the neutralization reaction tank and the hydrogen peroxide storage tank, the hydrogen peroxide conveying pipeline is mounted on the hydrogen peroxide conveying pipeline mounting support, one end of the hydrogen peroxide conveying pipeline positioned on the hydrogen peroxide conveying pipeline mounting support extends into the hydrogen peroxide storage tank at a position close to the bottom of the hydrogen peroxide storage tank, the other end of the hydrogen peroxide conveying pipeline extends into the neutralization reaction tank, and the hydrogen peroxide conveying pipeline positioned on the hydrogen peroxide conveying pipeline mounting support is also provided with the hydrogen peroxide pneumatic diaphragm pump;
the zinc dust conveying device comprises a zinc dust conveying pipeline, one end of the zinc dust conveying pipeline is fixedly connected with the bottom of a zinc dust storage bin which is arranged on a zinc dust storage bin mounting bracket in a penetrating and sealing manner, the other end of the zinc dust conveying pipeline extends into the neutralization reaction tank, and a zinc dust pneumatic discharge valve is arranged on the zinc dust conveying pipeline which is fixedly connected with the bottom of the zinc dust storage bin in a penetrating and sealing manner;
the device comprises a neutralization reaction tank, a plating assistant mixed liquid conveying device and a plating assistant output device, wherein the neutralization reaction tank is connected with the neutralization reaction tank through a plating assistant mixed liquid conveying pipeline; the plating assistant agent output device is a plating assistant agent output pipeline, one end of the plating assistant agent output pipeline is connected with a discharge port of the diaphragm plate-frame filter press, and the other end of the plating assistant agent output pipeline extends into a plating assistant agent finished product pool;
the hot galvanizing plating aid device comprises a hot galvanizing plating aid storage tank, a hot water heat exchanger arranged on the hot galvanizing plating aid storage tank, and a plating aid conveying device for conveying a plating aid from a plating aid finished product tank to the hot galvanizing plating aid storage tank, wherein the plating aid conveying device comprises a plating aid conveying pipeline, one end of the plating aid conveying pipeline extends into the plating aid finished product tank, the other end of the plating aid conveying pipeline is communicated and connected with the middle position of the bottom of the hot galvanizing plating aid storage tank, and a plating aid pneumatic diaphragm pump is arranged on the plating aid conveying pipeline communicated and connected with the middle position of the bottom of the hot galvanizing plating aid storage tank;
the hot galvanizing plating assistant conveying device is used for conveying the heated hot galvanizing plating assistant agent to a hot galvanizing plating assistant tank of a hot galvanizing production line, the hot galvanizing plating assistant conveying device comprises a hot galvanizing plating assistant conveying pipeline, one end of the hot galvanizing plating assistant conveying pipeline extends into the hot galvanizing plating assistant storage tank, the other end of the hot galvanizing plating assistant conveying pipeline extends into the hot galvanizing plating assistant tank of the hot galvanizing production line, and a hot galvanizing plating assistant pneumatic diaphragm pump is arranged on the hot galvanizing plating assistant conveying pipeline, one end of which extends into the hot galvanizing plating assistant storage tank.
The control system adopts the prior art for a main control operation box, the immersion type PH on-line monitor and the main control operation box adopt the prior art by using a wire electric connection technology, and the main control operation box adopts the prior art by having a display screen for displaying a PH value; the aeration working component consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator adopts the prior art; the immersion type PH on-line monitor and the diaphragm type plate-and-frame filter press both adopt the prior art.
A preparation method of a hot galvanizing plating assistant agent is characterized by comprising the following steps: the method comprises the following steps:
A. mixing the waste hydrochloric acid, the zinc dust, the industrial ammonia water, the hydrogen peroxide, the defoaming agent and the PAM aqueous solution according to the weight fraction, respectively and sequentially conveying the mixture to a waste hydrochloric acid storage tank, a zinc dust storage bin, an industrial ammonia water storage tank, a hydrogen peroxide storage tank, a defoaming agent storage barrel and a PAM aqueous solution storage barrel for later use, and diluting the hydrogen peroxide mixed according to the weight fraction by adding purified water according to a ratio of 1:1 to obtain hydrogen peroxide (in mass percentage) with the concentration of 14% for later use;
B. starting a waste hydrochloric acid pneumatic diaphragm pump, and pumping and conveying the waste hydrochloric acid stored in a waste hydrochloric acid storage tank into a neutralization reaction tank;
C. starting an aeration working assembly consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator for aeration, opening a zinc dust pneumatic discharge valve arranged on a zinc dust conveying pipeline, and sequentially adding zinc dust stored in a zinc dust storage bin into a neutralization reaction tank filled with waste hydrochloric acid;
D. opening a power supply button of an immersion PH on-line monitor on a main control operation box, and displaying a pH value in a neutralization reaction tank on a display screen of the main control operation box;
E. starting an industrial ammonia water pneumatic diaphragm pump, sequentially pumping and conveying industrial ammonia water in an industrial ammonia water storage tank into a neutralization reaction tank, continuously adding the industrial ammonia water into the neutralization reaction tank when the pH value of a reaction mixed solution of waste hydrochloric acid, zinc dust and the industrial ammonia water in the neutralization reaction tank is less than or equal to 4, stopping adding the industrial ammonia water into the neutralization reaction tank when the pH value is greater than or equal to 5, and continuously performing neutralization reaction for 6-7 hours in the neutralization reaction tank;
F. starting a hydrogen peroxide pneumatic diaphragm pump, controlling the extraction flow of hydrogen peroxide with the concentration of 14 percent and continuously and sequentially extracting and conveying the hydrogen peroxide with the concentration of 14 percent in a hydrogen peroxide storage tank into a neutralization reaction tank during the continuous neutralization reaction for 6-7 hours in the neutralization reaction tank; during the continuous neutralization reaction for 6-7 hours in the neutralization reaction tank, sequentially adding a defoaming agent storage barrel and a PAM aqueous solution stored in the PAM aqueous solution storage barrel into the neutralization reaction tank at intervals of 15-20 minutes;
J. observing the pH value in the neutralization reaction tank and reaction products of zinc chloride and ammonium chloride; continuously carrying out neutralization reaction in the neutralization reaction tank for 6-7 hours, controlling the pH value of reaction mixed liquor in the neutralization reaction tank to be 4-5, and detecting through pH test paper and comparing with the pH value in the neutralization reaction tank displayed on a display screen of a main control operation box; continuously neutralizing the reaction mixed liquor in the neutralization reaction tank for 6-7 hours, observing that the color of the reaction mixed liquor in the neutralization reaction tank is changed from gray to reddish brown, and finishing the reaction operation of the waste hydrochloric acid, the zinc dust and the industrial ammonia water in the neutralization reaction tank; at the moment, hydrogen peroxide with the concentration of 14 percent in a hydrogen peroxide storage tank is completely extracted and conveyed into a neutralization reaction tank, defoaming agents stored in a defoaming agent storage barrel are completely filled into the neutralization reaction tank, and PAM aqueous solution stored in a PAM aqueous solution storage barrel is completely filled into the neutralization reaction tank to obtain plating assistant mixed liquid;
H. starting a diaphragm type plate-and-frame filter press, starting a pneumatic diaphragm pump of the plating assistant mixed solution, pumping the plating assistant mixed solution in the neutralization reaction tank to the diaphragm type plate-and-frame filter press, and performing filter pressing and mud removal on the mixed solution by the diaphragm type plate-and-frame filter press to obtain the plating assistant containing 550g/L zinc chloride and 200g/L ammonium chloride (see the following detailed description: batch detection report of hot galvanizing plating assistant solution finished product); conveying the plating assistant agent containing 550g/L zinc chloride and 200g/L ammonium chloride containing 150g/L ammonium chloride to a plating assistant agent finished product tank by using a plating assistant agent output pipeline, completely conveying the plating assistant agent mixed solution in the neutralization reaction tank to a diaphragm type plate frame filter press, stopping aeration by an aeration working assembly consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator, and stopping the pneumatic diaphragm pump of the plating assistant agent mixed solution;
l, starting a plating assistant agent pneumatic diaphragm pump, conveying the plating assistant agent from a plating assistant agent finished product pool to a hot galvanizing plating assistant agent storage tank, starting a hot water heat exchanger arranged in the hot galvanizing plating assistant agent storage tank, heating the plating assistant agent conveyed into the hot galvanizing plating assistant agent storage tank to 65-70 ℃, starting the hot galvanizing plating assistant agent pneumatic diaphragm pump, conveying the hot galvanizing plating assistant agent heated to 65-70 ℃ to a hot galvanizing plating assistant tank of a hot galvanizing production line, and recycling the hot galvanizing plating assistant agent containing zinc chloride and ammonium chloride prepared by using zinc dust and waste hydrochloric acid.
The invention has the beneficial effects that: the hot galvanizing plating assistant agent is prepared from the following raw materials in parts by weight by using the preparation equipment and the preparation method of the hot galvanizing plating assistant agent, wherein the raw materials comprise: 100-120 parts of waste hydrochloric acid, 30-40 parts of zinc dust, 6-8 parts of ammonia water, 8-12 parts of hydrogen peroxide, 0.5-0.6 part of defoaming agent and 1-2 parts of PAM aqueous solution; the waste hydrochloric acid is clean waste hydrochloric acid prepared after a casting is washed by acid, the concentration of the waste hydrochloric acid is 8-10% (mass percent), the zinc dust contains 45-50% (mass percent) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percent), the concentration of hydrogen peroxide is 28% (mass percent), and the concentration of the PAM aqueous solution is 1 ‰ (mass percent). The zinc dust and the waste hydrochloric acid are used for preparing the plating assistant agent containing 550g/L of zinc chloride of 450 and 200g/L of ammonium chloride of 150, so that the zinc dust and the waste hydrochloric acid are changed into valuable, the environment is protected, and the hazardous waste treatment cost of enterprises is reduced; the solid consumption of zinc chloride and ammonium chloride powder in the plating assistant agent in the hot galvanizing production process is reduced, and the production cost of the hot galvanizing zinc-plated part is reduced. The preparation equipment of the hot galvanizing plating assistant can treat 180 tons of zinc dust and 500 tons of waste hydrochloric acid every year; the hot galvanizing plating assistant agent prepared by the invention can save 120 tons of zinc chloride powder solid and 50 tons of ammonium chloride powder solid every year, and the comprehensive economic benefit is 200 ten thousand yuan.
Attached: batch detection report of hot galvanizing plating assistant liquid finished product
| Batch sample numbering | Concentration of Zinc chloride (g/L) | Chlorination ofAmmonium concentration (g/L) |
| A batch of | 480 | 158 |
| Two batches | 525 | 166 |
| Three batches | 502 | 150 |
| Four batches | 513 | 171 |
| Five batches | 526 | 170 |
| Six batches | 508 | 200 |
| Seven batches of | 495 | 173 |
| Eight batches | 450 | 179 |
| Nine batches | 518 | 195 |
| Ten batches | 550 | 168 |
Drawings
The invention is further explained below with reference to the figures and examples;
FIG. 1 is a schematic structural diagram of a hot-dip galvanizing plating assistant preparation device according to the invention;
in the drawings: 1. a neutralization reaction tank, 2 a plating assistant agent finished product tank, 3 an aeration working assembly, 4 an immersion PH on-line monitor, 5 a waste hydrochloric acid storage tank, 6 an industrial ammonia water storage tank, 7 a hydrogen peroxide water storage tank, 8 a zinc ash storage bin, 9 a waste hydrochloric acid conveying pipeline, 10 a waste hydrochloric acid pneumatic diaphragm pump, 11 an industrial ammonia water conveying pipeline, 12 an industrial ammonia water pneumatic diaphragm pump, 13 a hydrogen peroxide conveying pipeline, 14 a hydrogen peroxide pneumatic diaphragm pump, 15 a zinc ash conveying pipeline, 16 a zinc ash pneumatic discharge valve, 17 a diaphragm type plate frame filter press, 18 a plating assistant agent conveying mixed liquid pipeline, 19 a plating assistant agent mixed liquid pneumatic diaphragm pump, 20 a plating assistant agent output pipeline, 21 a hot galvanizing assistant agent storage tank, 22 a hot water heat exchanger, 23 a plating assistant agent conveying pipeline, 24 a plating assistant agent pneumatic diaphragm pump, 25 a hot galvanizing assistant agent conveying pipeline, a hot galvanizing assistant agent, 26. A hot galvanizing plating assistant agent pneumatic diaphragm pump and a hot galvanizing plating assistant tank 27.
Detailed Description
The specific implementation mode of the invention is as follows:
example 1
A hot galvanizing plating assistant agent is characterized in that: the hot galvanizing plating assistant agent is prepared from the following raw materials in parts by weight: 100 parts of waste hydrochloric acid, 30 parts of zinc dust, 6 parts of ammonia water, 8 parts of hydrogen peroxide, 0.5 part of defoaming agent and 1 part of PAM aqueous solution; the waste hydrochloric acid is clean waste hydrochloric acid prepared by filtering after pickling castings, the concentration of the waste hydrochloric acid is 8% (mass percentage), the zinc dust contains 45% (mass percentage) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percentage), the concentration of hydrogen peroxide is 28% (mass percentage), and the concentration of the PAM aqueous solution is 1 ‰ (mass percentage);
as shown in fig. 1: a preparation device of a hot galvanizing plating assistant agent is characterized in that: the device comprises a neutralization reaction tank 1 arranged on a steel-concrete platform, a plating assistant agent finished product tank 2 arranged on the left platform of the neutralization reaction tank 1, an aeration working assembly 3 consisting of a valve (not shown in the attached drawing of the specification), an air duct and a diaphragm tube type microporous aerator, wherein the top surface of the bottom of the neutralization reaction tank 1 arranged on the steel-concrete platform is provided with an immersion PH on-line monitor 4; the system also comprises a waste hydrochloric acid storage tank 5, an industrial ammonia water storage tank 6 and a hydrogen peroxide storage tank 7 which are sequentially arranged on a steel-concrete floor on the right side of the neutralization reaction tank 1, and also comprises a defoaming agent storage barrel (the attached drawing of the specification is not drawn), a PAM aqueous solution storage barrel (the attached drawing of the specification is not drawn), a zinc dust storage bin 8 and a zinc dust storage bin mounting bracket (the attached drawing of the specification is not drawn), wherein the zinc dust storage bin mounting bracket is arranged on the steel-concrete floor on the rear side of the neutralization reaction tank 1, and the zinc dust storage bin 8 is arranged on the zinc dust storage bin mounting bracket; the waste hydrochloric acid conveying device comprises a waste hydrochloric acid conveying pipeline 9, a waste hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification), and a waste hydrochloric acid pneumatic diaphragm pump 10, wherein the waste hydrochloric acid conveying pipeline mounting bracket is mounted on a steel mixing platform between the neutralization reaction tank 1 and the waste hydrochloric acid storage tank 5, the waste hydrochloric acid conveying pipeline 9 is mounted on the waste hydrochloric acid conveying pipeline mounting bracket, one end of the waste hydrochloric acid conveying pipeline 9 positioned on the waste hydrochloric acid conveying pipeline mounting bracket extends into the waste hydrochloric acid storage tank 5 at a position close to the bottom of the waste hydrochloric acid storage tank, the other end of the waste hydrochloric acid conveying pipeline 9 extends into the neutralization reaction tank 1, and the waste hydrochloric acid pneumatic diaphragm pump 10 is further mounted on the waste hydrochloric acid conveying pipeline 9 positioned on the waste hydrochloric acid conveying pipeline mounting bracket;
the industrial ammonia water conveying device comprises an industrial ammonia water conveying pipeline 11, a hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification) and an industrial ammonia water pneumatic diaphragm pump 12, wherein the industrial ammonia water conveying pipeline mounting bracket is mounted on a steel concrete floor between a neutralization reaction tank 1 and an industrial ammonia water storage tank 6, the industrial ammonia water conveying pipeline 11 is mounted on the industrial ammonia water conveying pipeline mounting bracket, one end of the industrial ammonia water conveying pipeline 11 positioned on the industrial ammonia water conveying pipeline mounting bracket extends into the industrial ammonia water storage tank 6 close to the bottom of the industrial ammonia water storage tank, the other end of the industrial ammonia water conveying pipeline 11 extends into the neutralization reaction tank 1, and the industrial ammonia water conveying pipeline 11 positioned on the industrial ammonia water conveying pipeline mounting bracket is also provided with the industrial ammonia water pneumatic diaphragm pump 12;
the hydrogen peroxide conveying device comprises a hydrogen peroxide conveying pipeline 13, a hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification) and a hydrogen peroxide pneumatic diaphragm pump 14, wherein the hydrogen peroxide conveying pipeline mounting bracket is mounted on a steel concrete floor between the neutralization reaction tank 1 and the hydrogen peroxide storage tank 7, the hydrogen peroxide conveying pipeline 13 is mounted on the hydrogen peroxide conveying pipeline mounting bracket, one end of the hydrogen peroxide conveying pipeline 13 positioned on the hydrogen peroxide conveying pipeline mounting bracket extends into the hydrogen peroxide storage tank 7 at a position close to the bottom of the hydrogen peroxide storage tank, the other end of the hydrogen peroxide conveying pipeline 13 extends into the neutralization reaction tank 1, and the hydrogen peroxide conveying pipeline 13 positioned on the hydrogen peroxide conveying pipeline mounting bracket is also provided with the hydrogen peroxide pneumatic diaphragm pump 14;
the zinc dust conveying device comprises a zinc dust conveying pipeline 15, one end of the zinc dust conveying pipeline 15 is fixedly connected with the bottom of a zinc dust storage bin 8 arranged on a zinc dust storage bin mounting bracket in a penetrating and sealing manner, the other end of the zinc dust conveying pipeline extends into the neutralization reaction tank 1, and a zinc dust pneumatic discharge valve 16 is arranged on the zinc dust conveying pipeline 15 fixedly connected with the bottom of the zinc dust storage bin 8 in a penetrating and sealing manner;
the device comprises a diaphragm type plate-and-frame filter press 17, a neutralization reaction tank plating assistant mixed liquid conveying device and a plating assistant output device, wherein the diaphragm type plate-and-frame filter press 17 is installed on a steel-concrete floor on the right rear side of a neutralization reaction tank 1 by using a diaphragm type plate-and-frame filter press installation base, the neutralization reaction tank plating assistant mixed liquid conveying device comprises a neutralization reaction tank plating assistant mixed liquid conveying pipeline 18, one end of the neutralization reaction tank plating assistant mixed liquid conveying pipeline 18 is connected with a feeding hole of the diaphragm type plate-and-frame filter press 17, the other end of the neutralization reaction tank plating assistant mixed liquid conveying pipeline extends into the neutralization reaction tank 1, and a mixed liquid neutralization reaction tank plating assistant mixed liquid pneumatic diaphragm pump 19 is installed on the neutralization reaction tank plating assistant conveying pipeline 18 connected with the feeding hole of the diaphragm type plate-and-frame filter; the plating assistant agent output device is a plating assistant agent output pipeline 20, one end of the plating assistant agent output pipeline 20 is connected with a discharge hole of the diaphragm plate-and-frame filter press 17, and the other end extends into the plating assistant agent finished product pool 2;
the hot galvanizing plating aid conveying device comprises a plating aid conveying pipeline 23, one end of the plating aid conveying pipeline 23 extends into the plating aid finished product pool 2, the other end of the plating aid conveying pipeline is in through connection with the middle position of the bottom of the hot galvanizing plating aid storage tank 21, and a plating aid pneumatic diaphragm pump 24 is arranged on the plating aid conveying pipeline 23 in through connection with the middle position of the bottom of the hot galvanizing plating aid storage tank 21;
the hot galvanizing plating assistant conveying device is used for conveying the heated hot galvanizing plating assistant agent to a hot galvanizing plating assistant tank of a hot galvanizing production line, the hot galvanizing plating assistant conveying device comprises a hot galvanizing plating assistant conveying pipeline 25, one end of the hot galvanizing plating assistant conveying pipeline 25 extends into the hot galvanizing plating assistant storage tank 21, the other end of the hot galvanizing plating assistant conveying pipeline 25 extends into the hot galvanizing plating assistant tank 27 of the hot galvanizing production line, and a hot galvanizing plating assistant pneumatic diaphragm pump 26 is arranged on the hot galvanizing plating assistant conveying pipeline 25, one end of which extends into the hot galvanizing plating assistant storage tank 21.
The system is characterized by further comprising a control system, wherein the control system adopts the prior art for a main control operation box (not shown in the attached drawing of the specification), the immersion type PH on-line monitor and the main control operation box adopt the prior art by using a wire electric connection technology, and the main control operation box adopts the prior art by having a display screen for displaying a PH value; the aeration working component consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator adopts the prior art; the immersion type PH on-line monitor and the diaphragm type plate-and-frame filter press both adopt the prior art.
A preparation method of a hot galvanizing plating assistant agent is characterized by comprising the following steps: the method comprises the following steps:
A. the waste hydrochloric acid, zinc dust, industrial ammonia water, hydrogen peroxide, a defoaming agent and a PAM aqueous solution are mixed according to the weight fraction and are respectively and sequentially conveyed to a waste hydrochloric acid storage tank 5, a zinc dust storage bin 8, an industrial ammonia water storage tank 6, a hydrogen peroxide storage tank 7, a defoaming agent storage barrel and a PAM aqueous solution storage barrel for later use, and the hydrogen peroxide mixed according to the weight fraction is diluted by adding purified water according to the proportion of 1:1 to obtain hydrogen peroxide with the concentration of 14% (mass percentage) for later use;
B. starting a waste hydrochloric acid pneumatic diaphragm pump 10, and pumping and conveying the waste hydrochloric acid stored in a waste hydrochloric acid storage tank 5 into a neutralization reaction tank 1;
C. starting an aeration working assembly 3 consisting of a valve, an aeration pipeline and a diaphragm tubular microporous aerator for aeration, opening a zinc dust pneumatic discharge valve 16 arranged on a zinc dust conveying pipeline 15, and sequentially adding zinc dust stored in a zinc dust storage bin 8 into a neutralization reaction tank 1 filled with waste hydrochloric acid;
D. opening a power supply button of an immersion PH on-line monitor on a main control operation box, and displaying a pH value in a neutralization reaction tank on a display screen of the main control operation box;
E. starting an industrial ammonia water pneumatic diaphragm pump 12, sequentially pumping and conveying industrial ammonia water in an industrial ammonia water storage tank 6 into a neutralization reaction tank 1, continuously adding the industrial ammonia water into the neutralization reaction tank 1 when the pH value of a reaction mixed solution of waste hydrochloric acid, zinc dust and the industrial ammonia water in the neutralization reaction tank 1 is less than or equal to 4, stopping adding the industrial ammonia water into the neutralization reaction tank 1 when the pH value is greater than or equal to 5, and continuously neutralizing and reacting for 6 hours in the neutralization reaction tank;
F. starting the hydrogen peroxide pneumatic diaphragm pump 14, controlling the hydrogen peroxide extraction flow with the concentration of 14 percent and continuously and sequentially extracting and conveying the hydrogen peroxide with the concentration of 14 percent in the hydrogen peroxide storage tank 7 into the neutralization reaction tank 1 during the continuous neutralization reaction for 6 hours in the neutralization reaction tank; during the continuous neutralization reaction for 6 hours in the neutralization reaction tank, sequentially adding a defoaming agent storage barrel and a PAM aqueous solution stored in the PAM aqueous solution storage barrel into the neutralization reaction tank 1 at intervals of 15 minutes;
J. observing the pH value in the neutralization reaction tank 1 and reaction products of zinc chloride and ammonium chloride; during the continuous neutralization reaction in the neutralization reaction tank 1 for 6 hours, the pH value of the reaction mixed liquor in the neutralization reaction tank 1 is controlled between 4 and 5, and the pH value in the neutralization reaction tank is detected by pH test paper and compared with the pH value in the neutralization reaction tank displayed on a display screen of a main control operation box; when the reaction mixed liquor in the neutralization reaction tank 1 continuously performs neutralization reaction for 6 hours, observing that the color of the reaction mixed liquor in the neutralization reaction tank 1 is changed from gray to reddish brown, and finishing the reaction operation of waste hydrochloric acid, zinc dust and industrial ammonia water in the neutralization reaction tank; at the moment, hydrogen peroxide with the concentration of 14 percent in the hydrogen peroxide storage tank 7 is completely extracted and conveyed into the neutralization reaction tank 1, the defoaming agent stored in the defoaming agent storage barrel is completely added into the neutralization reaction tank 1, and the PAM aqueous solution stored in the PAM aqueous solution storage barrel is completely added into the neutralization reaction tank 1 to obtain plating assistant mixed solution;
H. starting a diaphragm type plate-and-frame filter press 17, starting a pneumatic diaphragm pump 19 of a plating assistant agent mixed solution, pumping the plating assistant agent mixed solution in the neutralization reaction tank 1 to the diaphragm type plate-and-frame filter press 17, and performing filter pressing and desliming by the diaphragm type plate-and-frame filter press to obtain a plating assistant agent containing 450g/L zinc chloride and 150g/L ammonium chloride (see the following detailed description: batch detection report of hot galvanizing plating assistant solution finished product); conveying the plating assistant agent containing zinc chloride of 450g/L and ammonium chloride of 150g/L into a plating assistant agent finished product tank 2 by using a plating assistant agent output pipeline 20, completely conveying the plating assistant agent mixed solution in the neutralization reaction tank 1 into a diaphragm type plate-and-frame filter press 17, stopping aeration by an aeration working assembly 3 consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator, and stopping a plating assistant agent mixed solution pneumatic diaphragm pump 19;
l, starting a plating assistant agent pneumatic diaphragm pump 24, conveying the plating assistant agent from a plating assistant agent finished product pool 2 to a hot galvanizing plating assistant agent storage tank 21, starting a hot water heat exchanger 22 installed in the hot galvanizing plating assistant agent storage tank 21, heating the plating assistant agent conveyed into the hot galvanizing plating assistant agent storage tank 21 to 65 ℃, starting a hot galvanizing plating assistant agent pneumatic diaphragm pump 26, conveying the hot galvanizing plating assistant agent heated to 65 ℃ to a hot galvanizing plating assistant tank 27 of a hot galvanizing production line, and recycling the hot galvanizing plating assistant agent containing zinc chloride and ammonium chloride prepared by using zinc dust and waste hydrochloric acid.
Example 2
A hot galvanizing plating assistant agent is characterized in that: the hot galvanizing plating assistant agent is prepared from the following raw materials in parts by weight: 120 parts of waste hydrochloric acid, 40 parts of zinc dust, 8 parts of ammonia water, 12 parts of hydrogen peroxide, 0.6 part of defoaming agent and 2 parts of PAM aqueous solution; the waste hydrochloric acid is clean waste hydrochloric acid prepared by filtering after pickling castings, the concentration of the waste hydrochloric acid is 10% (mass percentage), the zinc dust contains 50% (mass percentage) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percentage), the concentration of hydrogen peroxide is 28% (mass percentage), and the concentration of the PAM aqueous solution is 1 ‰ (mass percentage);
as shown in fig. 1: a preparation device of a hot galvanizing plating assistant agent is characterized in that: the device comprises a neutralization reaction tank 1 arranged on a steel-concrete platform, a plating assistant agent finished product tank 2 arranged on the left platform of the neutralization reaction tank 1, an aeration working assembly 3 consisting of a valve (not shown in the attached drawing of the specification), an air duct and a diaphragm tube type microporous aerator, wherein the top surface of the bottom of the neutralization reaction tank 1 arranged on the steel-concrete platform is provided with an immersion PH on-line monitor 4; the system also comprises a waste hydrochloric acid storage tank 5, an industrial ammonia water storage tank 6 and a hydrogen peroxide storage tank 7 which are sequentially arranged on a steel-concrete floor on the right side of the neutralization reaction tank 1, and also comprises a defoaming agent storage barrel (the attached drawing of the specification is not drawn), a PAM aqueous solution storage barrel (the attached drawing of the specification is not drawn), a zinc dust storage bin 8 and a zinc dust storage bin mounting bracket (the attached drawing of the specification is not drawn), wherein the zinc dust storage bin mounting bracket is arranged on the steel-concrete floor on the rear side of the neutralization reaction tank 1, and the zinc dust storage bin 8 is arranged on the zinc dust storage bin mounting bracket; the waste hydrochloric acid conveying device comprises a waste hydrochloric acid conveying pipeline 9, a waste hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification), and a waste hydrochloric acid pneumatic diaphragm pump 10, wherein the waste hydrochloric acid conveying pipeline mounting bracket is mounted on a steel mixing platform between the neutralization reaction tank 1 and the waste hydrochloric acid storage tank 5, the waste hydrochloric acid conveying pipeline 9 is mounted on the waste hydrochloric acid conveying pipeline mounting bracket, one end of the waste hydrochloric acid conveying pipeline 9 positioned on the waste hydrochloric acid conveying pipeline mounting bracket extends into the waste hydrochloric acid storage tank 5 at a position close to the bottom of the waste hydrochloric acid storage tank, the other end of the waste hydrochloric acid conveying pipeline 9 extends into the neutralization reaction tank 1, and the waste hydrochloric acid pneumatic diaphragm pump 10 is further mounted on the waste hydrochloric acid conveying pipeline 9 positioned on the waste hydrochloric acid conveying pipeline mounting bracket;
the industrial ammonia water conveying device comprises an industrial ammonia water conveying pipeline 11, a hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification) and an industrial ammonia water pneumatic diaphragm pump 12, wherein the industrial ammonia water conveying pipeline mounting bracket is mounted on a steel concrete floor between a neutralization reaction tank 1 and an industrial ammonia water storage tank 6, the industrial ammonia water conveying pipeline 11 is mounted on the industrial ammonia water conveying pipeline mounting bracket, one end of the industrial ammonia water conveying pipeline 11 positioned on the industrial ammonia water conveying pipeline mounting bracket extends into the industrial ammonia water storage tank 6 close to the bottom of the industrial ammonia water storage tank, the other end of the industrial ammonia water conveying pipeline 11 extends into the neutralization reaction tank 1, and the industrial ammonia water conveying pipeline 11 positioned on the industrial ammonia water conveying pipeline mounting bracket is also provided with the industrial ammonia water pneumatic diaphragm pump 12;
the hydrogen peroxide conveying device comprises a hydrogen peroxide conveying pipeline 13, a hydrochloric acid conveying pipeline mounting bracket (not shown in the attached drawing of the specification) and a hydrogen peroxide pneumatic diaphragm pump 14, wherein the hydrogen peroxide conveying pipeline mounting bracket is mounted on a steel concrete floor between the neutralization reaction tank 1 and the hydrogen peroxide storage tank 7, the hydrogen peroxide conveying pipeline 13 is mounted on the hydrogen peroxide conveying pipeline mounting bracket, one end of the hydrogen peroxide conveying pipeline 13 positioned on the hydrogen peroxide conveying pipeline mounting bracket extends into the hydrogen peroxide storage tank 7 at a position close to the bottom of the hydrogen peroxide storage tank, the other end of the hydrogen peroxide conveying pipeline 13 extends into the neutralization reaction tank 1, and the hydrogen peroxide conveying pipeline 13 positioned on the hydrogen peroxide conveying pipeline mounting bracket is also provided with the hydrogen peroxide pneumatic diaphragm pump 14;
the zinc dust conveying device comprises a zinc dust conveying pipeline 15, one end of the zinc dust conveying pipeline 15 is fixedly connected with the bottom of a zinc dust storage bin 8 arranged on a zinc dust storage bin mounting bracket in a penetrating and sealing manner, the other end of the zinc dust conveying pipeline extends into the neutralization reaction tank 1, and a zinc dust pneumatic discharge valve 16 is arranged on the zinc dust conveying pipeline 15 fixedly connected with the bottom of the zinc dust storage bin 8 in a penetrating and sealing manner;
the device comprises a diaphragm type plate-and-frame filter press 17, a neutralization reaction tank plating assistant mixed liquid conveying device and a plating assistant output device, wherein the diaphragm type plate-and-frame filter press 17 is installed on a steel-concrete floor on the right rear side of a neutralization reaction tank 1 by using a diaphragm type plate-and-frame filter press installation base, the neutralization reaction tank plating assistant mixed liquid conveying device comprises a neutralization reaction tank plating assistant mixed liquid conveying pipeline 18, one end of the neutralization reaction tank plating assistant mixed liquid conveying pipeline 18 is connected with a feeding hole of the diaphragm type plate-and-frame filter press 17, the other end of the neutralization reaction tank plating assistant mixed liquid conveying pipeline extends into the neutralization reaction tank 1, and a mixed liquid neutralization reaction tank plating assistant mixed liquid pneumatic diaphragm pump 19 is installed on the neutralization reaction tank plating assistant conveying pipeline 18 connected with the feeding hole of the diaphragm type plate-and-frame filter; the plating assistant agent output device is a plating assistant agent output pipeline 20, one end of the plating assistant agent output pipeline 20 is connected with a discharge hole of the diaphragm plate-and-frame filter press 17, and the other end extends into the plating assistant agent finished product pool 2;
the hot galvanizing plating aid conveying device comprises a plating aid conveying pipeline 23, one end of the plating aid conveying pipeline 23 extends into the plating aid finished product pool 2, the other end of the plating aid conveying pipeline is in through connection with the middle position of the bottom of the hot galvanizing plating aid storage tank 21, and a plating aid pneumatic diaphragm pump 24 is arranged on the plating aid conveying pipeline 23 in through connection with the middle position of the bottom of the hot galvanizing plating aid storage tank 21;
the hot galvanizing plating assistant conveying device is used for conveying the heated hot galvanizing plating assistant agent to a hot galvanizing plating assistant tank of a hot galvanizing production line, the hot galvanizing plating assistant conveying device comprises a hot galvanizing plating assistant conveying pipeline 25, one end of the hot galvanizing plating assistant conveying pipeline 25 extends into the hot galvanizing plating assistant storage tank 21, the other end of the hot galvanizing plating assistant conveying pipeline 25 extends into the hot galvanizing plating assistant tank 27 of the hot galvanizing production line, and a hot galvanizing plating assistant pneumatic diaphragm pump 26 is arranged on the hot galvanizing plating assistant conveying pipeline 25, one end of which extends into the hot galvanizing plating assistant storage tank 21.
The system is characterized by further comprising a control system, wherein the control system adopts the prior art for a main control operation box (not shown in the attached drawing of the specification), the immersion type PH on-line monitor and the main control operation box adopt the prior art by using a wire electric connection technology, and the main control operation box adopts the prior art by having a display screen for displaying a PH value; the aeration working component consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator adopts the prior art; the immersion type PH on-line monitor and the diaphragm type plate-and-frame filter press both adopt the prior art.
A preparation method of a hot galvanizing plating assistant agent is characterized by comprising the following steps: the method comprises the following steps:
A. the waste hydrochloric acid, zinc dust, industrial ammonia water, hydrogen peroxide, a defoaming agent and a PAM aqueous solution are mixed according to the weight fraction and are respectively and sequentially conveyed to a waste hydrochloric acid storage tank 5, a zinc dust storage bin 8, an industrial ammonia water storage tank 6, a hydrogen peroxide storage tank 7, a defoaming agent storage barrel and a PAM aqueous solution storage barrel for later use, and the hydrogen peroxide mixed according to the weight fraction is diluted by adding purified water according to the proportion of 1:1 to obtain hydrogen peroxide with the concentration of 14% (mass percentage) for later use;
B. starting a waste hydrochloric acid pneumatic diaphragm pump 10, and pumping and conveying the waste hydrochloric acid stored in a waste hydrochloric acid storage tank 5 into a neutralization reaction tank 1;
C. starting an aeration working assembly 3 consisting of a valve, an aeration pipeline and a diaphragm tubular microporous aerator for aeration, opening a zinc dust pneumatic discharge valve 16 arranged on a zinc dust conveying pipeline 15, and sequentially adding zinc dust stored in a zinc dust storage bin 8 into a neutralization reaction tank 1 filled with waste hydrochloric acid;
D. opening a power supply button of an immersion PH on-line monitor on a main control operation box, and displaying a pH value in a neutralization reaction tank on a display screen of the main control operation box;
E. starting an industrial ammonia water pneumatic diaphragm pump 12, sequentially pumping and conveying industrial ammonia water in an industrial ammonia water storage tank 6 into a neutralization reaction tank 1, continuously adding the industrial ammonia water into the neutralization reaction tank 1 when the pH value of a reaction mixed solution of waste hydrochloric acid, zinc dust and the industrial ammonia water in the neutralization reaction tank 1 is less than or equal to 4, stopping adding the industrial ammonia water into the neutralization reaction tank 1 when the pH value is greater than or equal to 5, and continuously neutralizing and reacting for 7 hours in the neutralization reaction tank;
F. starting the hydrogen peroxide pneumatic diaphragm pump 14, controlling the hydrogen peroxide extraction flow with the concentration of 14 percent and continuously and sequentially extracting and conveying the hydrogen peroxide with the concentration of 14 percent in the hydrogen peroxide storage tank 7 into the neutralization reaction tank 1 during the continuous neutralization reaction for 7 hours in the neutralization reaction tank; during the continuous neutralization reaction for 7 hours in the neutralization reaction tank, sequentially adding a defoaming agent storage barrel and a PAM aqueous solution stored in the PAM aqueous solution storage barrel into the neutralization reaction tank 1 at intervals of 20 minutes;
J. observing the pH value in the neutralization reaction tank 1 and reaction products of zinc chloride and ammonium chloride; continuously carrying out neutralization reaction in the neutralization reaction tank 1 for 7 hours, controlling the pH value of reaction mixed liquor in the neutralization reaction tank 1 to be 4-5, and detecting through pH test paper and comparing with the pH value in the neutralization reaction tank displayed on a display screen of a main control operation box; when the reaction mixed liquor in the neutralization reaction tank 1 continuously performs neutralization reaction for 7 hours, observing that the color of the reaction mixed liquor in the neutralization reaction tank 1 is changed from gray to reddish brown, and finishing the reaction operation of waste hydrochloric acid, zinc dust and industrial ammonia water in the neutralization reaction tank; at the moment, hydrogen peroxide with the concentration of 14 percent in the hydrogen peroxide storage tank 7 is completely extracted and conveyed into the neutralization reaction tank 1, the defoaming agent stored in the defoaming agent storage barrel is completely added into the neutralization reaction tank 1, and the PAM aqueous solution stored in the PAM aqueous solution storage barrel is completely added into the neutralization reaction tank 1 to obtain plating assistant mixed solution;
H. starting a diaphragm type plate-and-frame filter press 17, starting a pneumatic diaphragm pump 19 of a plating assistant agent mixed solution, pumping the plating assistant agent mixed solution in the neutralization reaction tank 1 to the diaphragm type plate-and-frame filter press 17, and performing filter pressing and desliming through the diaphragm type plate-and-frame filter press to obtain a plating assistant agent containing 550g/L zinc chloride and 200g/L ammonium chloride (see the following detailed description: batch detection report of hot galvanizing plating assistant solution finished product); a plating assistant agent output pipeline 20 is used for conveying the plating assistant agent containing 550g/L zinc chloride and 200g/L ammonium chloride into a plating assistant agent finished product tank 2, the plating assistant agent mixed solution in the neutralization reaction tank 1 is completely conveyed into a diaphragm type plate-and-frame filter press 17, an aeration working assembly 3 consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator stops aeration, and a pneumatic diaphragm pump 19 of the plating assistant agent mixed solution is stopped;
l, starting a plating assistant agent pneumatic diaphragm pump 24, conveying the plating assistant agent from a plating assistant agent finished product pool 2 to a hot galvanizing plating assistant agent storage tank 21, starting a hot water heat exchanger 22 installed in the hot galvanizing plating assistant agent storage tank 21, heating the plating assistant agent conveyed into the hot galvanizing plating assistant agent storage tank 21 to 70 ℃, starting a hot galvanizing plating assistant agent pneumatic diaphragm pump 26, conveying the hot galvanizing plating assistant agent heated to 70 ℃ to a hot galvanizing plating assistant tank 27 of a hot galvanizing production line, and recycling the hot galvanizing plating assistant agent containing zinc chloride and ammonium chloride prepared by using zinc dust and waste hydrochloric acid.
The scope of the present invention is not limited to the above-described embodiments, and any technical modifications made according to the principles of the present invention are within the scope of the present invention.
Claims (3)
1. A hot galvanizing plating assistant agent is characterized in that: the hot galvanizing plating assistant agent is prepared from the following raw materials in parts by weight: 100-120 parts of waste hydrochloric acid, 30-40 parts of zinc dust, 6-8 parts of ammonia water, 8-12 parts of hydrogen peroxide, 0.5-0.6 part of defoaming agent and 1-2 parts of PAM aqueous solution; the waste hydrochloric acid is clean waste hydrochloric acid prepared by filtering after pickling castings, the concentration of the waste hydrochloric acid is 8-10% (mass percent), the zinc dust contains 45-50% (mass percent) of zinc oxide, the ammonia water is industrial ammonia water, the concentration of the industrial ammonia water is 20% (mass percent), the concentration of hydrogen peroxide is 28% (mass percent), and the concentration of the PAM aqueous solution is 1 ‰ (mass percent).
2. The preparation equipment of the hot galvanizing plating assistant agent according to claim 1, which is characterized in that: the device comprises a neutralization reaction tank arranged on a steel-concrete platform, a plating assistant agent finished product tank arranged on the steel-concrete platform on the left side of the neutralization reaction tank, an aeration working assembly consisting of a valve, an air duct and a diaphragm tubular microporous aerator and arranged on the top surface of the bottom of the neutralization reaction tank arranged on the steel-concrete platform, and an immersion PH on-line monitor arranged on the position close to the left tank wall of the neutralization reaction tank; the system also comprises a waste hydrochloric acid storage tank, an industrial ammonia water storage tank and a hydrogen peroxide storage tank which are sequentially arranged on a steel-concrete floor on the right side of the neutralization reaction tank, and also comprises a defoaming agent storage barrel, a PAM aqueous solution storage barrel, a zinc dust storage bin and a zinc dust storage bin mounting bracket, wherein the zinc dust storage bin mounting bracket is arranged on the steel-concrete floor on the rear side of the neutralization reaction tank, and the zinc dust storage bin is arranged on the zinc dust storage bin mounting bracket; the waste hydrochloric acid conveying device comprises a waste hydrochloric acid conveying pipeline, a waste hydrochloric acid conveying pipeline mounting support and a waste hydrochloric acid pneumatic diaphragm pump, the waste hydrochloric acid conveying pipeline mounting support is mounted on a steel mixing platform between the neutralization reaction tank and the waste hydrochloric acid storage tank, the waste hydrochloric acid conveying pipeline is mounted on the waste hydrochloric acid conveying pipeline mounting support, one end of the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support extends into the waste hydrochloric acid storage tank at a position close to the bottom of the waste hydrochloric acid storage tank, the other end of the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support extends into the neutralization reaction tank, and the waste hydrochloric acid pneumatic diaphragm pump is mounted on the waste hydrochloric acid conveying pipeline positioned on the waste hydrochloric acid conveying pipeline mounting support;
the industrial ammonia water conveying device comprises an industrial ammonia water conveying pipeline, a hydrochloric acid conveying pipeline mounting support and an industrial ammonia water pneumatic diaphragm pump, wherein the industrial ammonia water conveying pipeline mounting support is mounted on a steel-concrete floor between a neutralization reaction tank and an industrial ammonia water storage tank;
the hydrogen peroxide conveying device comprises a hydrogen peroxide conveying pipeline, a hydrochloric acid conveying pipeline mounting support and a hydrogen peroxide pneumatic diaphragm pump, wherein the hydrogen peroxide conveying pipeline mounting support is mounted on a steel concrete floor between the neutralization reaction tank and the hydrogen peroxide storage tank, the hydrogen peroxide conveying pipeline is mounted on the hydrogen peroxide conveying pipeline mounting support, one end of the hydrogen peroxide conveying pipeline positioned on the hydrogen peroxide conveying pipeline mounting support extends into the hydrogen peroxide storage tank at a position close to the bottom of the hydrogen peroxide storage tank, the other end of the hydrogen peroxide conveying pipeline extends into the neutralization reaction tank, and the hydrogen peroxide pneumatic diaphragm pump is mounted on the hydrogen peroxide conveying pipeline positioned on the hydrogen peroxide conveying pipeline mounting support;
the zinc dust conveying device comprises a zinc dust conveying pipeline, one end of the zinc dust conveying pipeline is fixedly connected with the bottom of a zinc dust storage bin which is arranged on a zinc dust storage bin mounting bracket in a penetrating and sealing manner, the other end of the zinc dust conveying pipeline extends into the neutralization reaction tank, and a zinc dust pneumatic discharge valve is arranged on the zinc dust conveying pipeline which is fixedly connected with the bottom of the zinc dust storage bin in a penetrating and sealing manner;
the device comprises a neutralization reaction tank, a plating assistant mixed liquid conveying device and a plating assistant output device, wherein the neutralization reaction tank is connected with the neutralization reaction tank through a plating assistant mixed liquid conveying pipeline; the plating assistant agent output device is a plating assistant agent output pipeline, one end of the plating assistant agent output pipeline is connected with a discharge port of the diaphragm plate-frame filter press, and the other end of the plating assistant agent output pipeline extends into a plating assistant agent finished product pool;
the hot galvanizing plating aid device comprises a hot galvanizing plating aid storage tank, a hot water heat exchanger arranged on the hot galvanizing plating aid storage tank, and a plating aid conveying device for conveying a plating aid from a plating aid finished product tank to the hot galvanizing plating aid storage tank, wherein the plating aid conveying device comprises a plating aid conveying pipeline, one end of the plating aid conveying pipeline extends into the plating aid finished product tank, the other end of the plating aid conveying pipeline is communicated and connected with the middle position of the bottom of the hot galvanizing plating aid storage tank, and a plating aid pneumatic diaphragm pump is arranged on the plating aid conveying pipeline communicated and connected with the middle position of the bottom of the hot galvanizing plating aid storage tank;
the hot galvanizing plating assistant conveying device is used for conveying the heated hot galvanizing plating assistant agent to a hot galvanizing plating assistant tank of a hot galvanizing production line, the hot galvanizing plating assistant conveying device comprises a hot galvanizing plating assistant conveying pipeline, one end of the hot galvanizing plating assistant conveying pipeline extends into the hot galvanizing plating assistant storage tank, the other end of the hot galvanizing plating assistant conveying pipeline extends into the hot galvanizing plating assistant tank of the hot galvanizing production line, and a hot galvanizing plating assistant pneumatic diaphragm pump is arranged on the hot galvanizing plating assistant conveying pipeline, one end of which extends into the hot galvanizing plating assistant storage tank.
3. The preparation method of the hot galvanizing plating assistant agent according to claim 1, which is characterized in that: the method comprises the following steps:
A. mixing the waste hydrochloric acid, the zinc dust, the industrial ammonia water, the hydrogen peroxide, the defoaming agent and the PAM aqueous solution according to the weight fraction, respectively and sequentially conveying the mixture to a waste hydrochloric acid storage tank, a zinc dust storage bin, an industrial ammonia water storage tank, a hydrogen peroxide storage tank, a defoaming agent storage barrel and a PAM aqueous solution storage barrel for later use, and diluting the hydrogen peroxide mixed according to the weight fraction by adding purified water according to a ratio of 1:1 to obtain hydrogen peroxide (in mass percentage) with the concentration of 14% for later use;
B. starting a waste hydrochloric acid pneumatic diaphragm pump, and pumping and conveying the waste hydrochloric acid stored in a waste hydrochloric acid storage tank into a neutralization reaction tank;
C. starting an aeration working assembly consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator for aeration, opening a zinc dust pneumatic discharge valve arranged on a zinc dust conveying pipeline, and sequentially adding zinc dust stored in a zinc dust storage bin into a neutralization reaction tank filled with waste hydrochloric acid;
D. opening a power supply button of an immersion PH on-line monitor on a main control operation box, and displaying a pH value in a neutralization reaction tank on a display screen of the main control operation box;
E. starting an industrial ammonia water pneumatic diaphragm pump, sequentially pumping and conveying industrial ammonia water in an industrial ammonia water storage tank into a neutralization reaction tank, continuously adding the industrial ammonia water into the neutralization reaction tank when the pH value of a reaction mixed solution of waste hydrochloric acid, zinc dust and the industrial ammonia water in the neutralization reaction tank is less than or equal to 4, stopping adding the industrial ammonia water into the neutralization reaction tank when the pH value is greater than or equal to 5, and continuously performing neutralization reaction for 6-7 hours in the neutralization reaction tank;
F. starting a hydrogen peroxide pneumatic diaphragm pump, controlling the extraction flow of hydrogen peroxide with the concentration of 14 percent and continuously and sequentially extracting and conveying the hydrogen peroxide with the concentration of 14 percent in a hydrogen peroxide storage tank into a neutralization reaction tank during the continuous neutralization reaction for 6-7 hours in the neutralization reaction tank; during the continuous neutralization reaction for 6-7 hours in the neutralization reaction tank, sequentially adding a defoaming agent storage barrel and a PAM aqueous solution stored in the PAM aqueous solution storage barrel into the neutralization reaction tank at intervals of 15-20 minutes;
J. observing the pH value in the neutralization reaction tank and reaction products of zinc chloride and ammonium chloride; continuously carrying out neutralization reaction in the neutralization reaction tank for 6-7 hours, controlling the pH value of reaction mixed liquor in the neutralization reaction tank to be 4-5, and detecting through pH test paper and comparing with the pH value in the neutralization reaction tank displayed on a display screen of a main control operation box; continuously neutralizing the reaction mixed liquor in the neutralization reaction tank for 6-7 hours, observing that the color of the reaction mixed liquor in the neutralization reaction tank is changed from gray to reddish brown, and finishing the reaction operation of the waste hydrochloric acid, the zinc dust and the industrial ammonia water in the neutralization reaction tank; at the moment, hydrogen peroxide with the concentration of 14 percent in a hydrogen peroxide storage tank is completely extracted and conveyed into a neutralization reaction tank, defoaming agents stored in a defoaming agent storage barrel are completely filled into the neutralization reaction tank, and PAM aqueous solution stored in a PAM aqueous solution storage barrel is completely filled into the neutralization reaction tank to obtain plating assistant mixed liquid;
H. starting a diaphragm type plate-and-frame filter press, starting a pneumatic diaphragm pump of the plating assistant mixed solution, pumping the plating assistant mixed solution in the neutralization reaction tank to the diaphragm type plate-and-frame filter press, and performing filter pressing and mud removal on the mixed solution by the diaphragm type plate-and-frame filter press to obtain the plating assistant containing 550g/L zinc chloride and 200g/L ammonium chloride (see the following detailed description: batch detection report of hot galvanizing plating assistant solution finished product); conveying the plating assistant agent containing 550g/L zinc chloride and 200g/L ammonium chloride containing 150g/L ammonium chloride to a plating assistant agent finished product tank by using a plating assistant agent output pipeline, completely conveying the plating assistant agent mixed solution in the neutralization reaction tank to a diaphragm type plate frame filter press, stopping aeration by an aeration working assembly consisting of a valve, an aeration pipeline and a diaphragm tube type microporous aerator, and stopping the pneumatic diaphragm pump of the plating assistant agent mixed solution;
l, starting a plating assistant agent pneumatic diaphragm pump, conveying the plating assistant agent from a plating assistant agent finished product pool to a hot galvanizing plating assistant agent storage tank, starting a hot water heat exchanger arranged in the hot galvanizing plating assistant agent storage tank, heating the plating assistant agent conveyed into the hot galvanizing plating assistant agent storage tank to 65-70 ℃, starting the hot galvanizing plating assistant agent pneumatic diaphragm pump, conveying the hot galvanizing plating assistant agent heated to 65-70 ℃ to a hot galvanizing plating assistant tank of a hot galvanizing production line, and recycling the hot galvanizing plating assistant agent containing zinc chloride and ammonium chloride prepared by using zinc dust and waste hydrochloric acid.
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| CN202011441686.XA CN112536007A (en) | 2020-12-08 | 2020-12-08 | Hot galvanizing plating assistant agent and preparation equipment and method thereof |
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| CN202011441686.XA CN112536007A (en) | 2020-12-08 | 2020-12-08 | Hot galvanizing plating assistant agent and preparation equipment and method thereof |
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Application publication date: 20210323 |