CN106830488A - A kind of steel galvanization spent acid auto purification environment-friendly disposal system and method - Google Patents
A kind of steel galvanization spent acid auto purification environment-friendly disposal system and method Download PDFInfo
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- CN106830488A CN106830488A CN201710179238.9A CN201710179238A CN106830488A CN 106830488 A CN106830488 A CN 106830488A CN 201710179238 A CN201710179238 A CN 201710179238A CN 106830488 A CN106830488 A CN 106830488A
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- spent acid
- heat exchanger
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- crystallizer
- acid
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- 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
- C01G49/10—Halides
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
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- 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
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of steel galvanization spent acid auto purification environment-friendly disposal system and method,It is related to environmental technology field,The system includes heat exchanger,Vacuum vapour liquid separator,Cooler,Crystallizer and filter separator,The water inlet of the heat exchanger is connected with heat source fluid by water pump,Heat exchanger is connected with vacuum vapour liquid separator,The steam drain of vacuum vapour liquid separator is connected by vavuum pump with cooler,The discharge outlet of vacuum vapour liquid separator is also connected with crystallizer,Crystallizer is connected with filter separator,The heat source fluid is specially the hot water after the stack gases heating using galvanizing equipment discharge,The present invention is based on physical method,Gaseous pure acid solution and the acid pickle containing impurity are separated using low temperature distillation volatility process under negative pressure,Pure diluted acid and the frerrous chloride crystalline solid of solid-state that formation secondary can be utilized,Eliminate zinc-plated spent acid discharge,Reduce environmental pollution,Heat energy energy-saving and emission-reduction are reclaimed simultaneously,Realize the regeneration of resource.
Description
Technical field
The present invention relates to environmental technology field, and in particular to a kind of steel galvanization spent acid auto purification environment-friendly disposal system and one
Plant steel galvanization spent acid auto purification environment-friendly treatment method.
Background technology
Steel galvanization anti-corrosion is produced and processed, and surface generally has to processing of rust removing；Much by the way of pickling, because at this
It is reason method efficiency high, simple, thoroughly；Metal surface is easy to be processed further, greatly extension steel products life-span and security performance；
But a large amount of spent acid produced by pickling form serious environmental issue, harmless treatment is difficult, and conventional process expense is high.
Serious safety problem is formed in spent acid storage, transport process.
Chinese Patent Application No. 201610756996.8 discloses a kind of zinc-plated waste acid recycling system, including sequentially connects
Spent acid PH regulating reservoirs, sedimentation basin, filtering ponds, reaction tank one, filter press, the reaction tank two, dryer for connecing, zinc-plated generation spent acid PH
After regulating reservoir, the impurity such as the silt that spent acid lime mud and raw material spent acid are brought into are removed through piping to sedimentation basin and filtering ponds,
Top filtrate, top filtrate is transported into reaction tank one by the pump housing, to ceaselessly being stirred after being passed through alkali lye in reaction tank one, and
Need to be passed through air in reaction tank one, obtain coagulating sedimentation thing, bottom sediment thing a kind of by being separated after precipitation in reaction tank
Entering filter press carries out press filtration, and the liquid phase CaCl2 solution heating evaporation on upper strata is concentrated, by the sediment that moisture removal is removed after press filtration extremely
Remaining Fe (OH) 2 to hydrogen peroxide is added in reactor, is oxidized to Fe (OH) 3 by reaction tank two again, and sediment drying obtains oxygen
Change iron oxide red finished product.Spent acid harmless treatment is realized using waste acid recycling system, resource recycling is realized.
Chinese Patent Application No. 201410666815.3 discloses zinc-plated industrial acid-washing waste acid and recycles production technology, tool
Have the following steps：1. spent acid pH is adjusted；2. filter；3. prepared by crystal seed；4. it is aerated；5. separation of solid and liquid is precipitated；6. react；7. press
Filter；8. dry, zinc-plated industrial acid-washing waste acid of the invention recycles the harmless treatment that production technology realizes acid-washing waste acid,
Utility iron oxide red and CaCl2 products are obtained, resource recycling is realized.
Both recycling systems above-mentioned are to employ chemical reaction to extract some materials in spent acid, as
Pure spent acid, does not use well, or extraction efficiency is relatively low；Do not take simultaneously yet and mainly utilize zinc-plated life
Produce flue waste-heat thermal source.
The content of the invention
It is an object of the invention to provide one kind using conventional, common low-grade remaining heat thermal energy methods, green energy conservation profit is solved
Process system, to reduce the manufacturing of the production of steel galvanization anti-corrosion and finished surface processing of rust removing by the way of pickling
Cost and consumption, strengthen resource regeneration, eliminate environmentally friendly hidden danger.
A kind of steel galvanization spent acid auto purification environment-friendly disposal system, including heat exchanger, vacuum-vapour liquid separator, cooler,
Crystallizer and filter separator, the water inlet of the heat exchanger are connected with heat source fluid, heat exchanger and vacuum-vapour-liquid by water pump
Separator is connected, and the steam drain of vacuum-vapour liquid separator is connected by vavuum pump with cooler, the row of vacuum-vapour liquid separator
The mouth of a river is also connected with crystallizer, and crystallizer is connected with filter separator, and the heat source fluid is specially using galvanizing equipment discharge
Stack gases heating after hot water.
Preferably, the discharge outlet of the filter separator is also connected by pipeline with heat exchanger, and electromagnetism is connected with pipeline
Valve.
Preferably, the hot water storage is additionally provided with electric heater unit in boiler in the boiler.
Preferably, the motor thermal is specially electric heating tube, and the electric heating tube is shaped as coiled.
Preferably, multiple temperature sensors, pressure sensor and liquid level sensor, hot water are provided with the boiler
The outer wall of case is provided with display, and temperature sensor is connected by microprocessor with display.
A kind of steel galvanization spent acid auto purification environment-friendly treatment method, comprises the following steps：
(1) gone back in storage tank to the water heating in boiler using some stack gases of galvanizing equipment in production system
Electric heater unit is provided with, the heating agent after heating, hot water is produced to steel galvanization anti-corrosion by heat exchanger and finished surface is removed
Spent acid heating after rust treatment；
(2) spent acid after heating is passed into vacuum-vapour liquid separator low temperature under negative pressure and carries out vapor-liquid separation, gaseous
Steam, Volatile Gas enter into vavuum pump the pure diluted acid for being absorbed as liquid, and condensation is in case zinc-plated life in entering back into cooler
Product is used, and the acid pickle of liquid is drained into through discharge outlet in vacuum-vapour liquid separator carries out crystallization treatment in crystallizer, forms solid
The frerrous chloride crystalline solid of state；
(3) mixture in the step (2) after crystallization is separated by filtration device and filters out crystalline solid, remaining spent acid
It is passed into heat exchanger again, is processed again.
The advantage of the invention is that：The present invention is based on physical method, optimizes existing Waste acid recovery technology layout, heat energy
Using, separate, absorb and purification spent acid facility compact, technique is exquisite, safety, will using low temperature distillation under negative pressure-volatility process
Gaseous pure acid solution is separated with the acid pickle containing impurity, and gaseous acid solution forms pure diluted acid after cooling, is remained
After the crystallized device of liquid acid pickle and filter separator that get off, the frerrous chloride crystalline solid of solid-state, above-mentioned pure diluted acid are formed
Secondary can be utilized with frerrous chloride crystallizer, whole technique realizes environmental purification, energy-saving and emission-reduction and resource regeneration.
Brief description of the drawings
Fig. 1 is a kind of flow chart of steel galvanization spent acid auto purification environment-friendly disposal system of the present invention.
Fig. 2 is the cross-sectional view of boiler in the present invention.
Fig. 3 is the structural representation of boiler in the present invention.
Wherein, 1- heat exchangers, 2- vacuum-vapour liquid separator, 3- coolers, 4- crystallizers, 5- filter separators, 6- water
Pump, 7- pipelines, 8- magnetic valves, 9- boilers, 10- electric heater units, 11- temperature sensors, 12- displays, 13- vavuum pumps,
14- pressure sensors, 15- liquid level sensors.
Specific embodiment
For technological means, creation characteristic, reached purpose and effect for making present invention realization are easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.
As shown in Figure 1 to Figure 3, a kind of steel galvanization spent acid auto purification environment-friendly disposal system, including heat exchanger 1, vacuum-vapour
Liquid/gas separator 2, cooler 3, crystallizer 4 and filter separator 5, the water inlet of the heat exchanger 1 are connected with fluid by water pump 6
Thermal source, heat exchanger 1 is connected with vacuum-vapour liquid separator 2, and the steam drain of vacuum-vapour liquid separator 2 is by vavuum pump 13 and cooling
Device 3 is connected, and the discharge outlet of vacuum-vapour liquid separator 2 is also connected with crystallizer 4, and crystallizer 4 is connected with filter separator 5, described
Heat source fluid is specially the hot water after the stack gases heating using galvanizing equipment discharge.
In the present embodiment, the discharge outlet of the filter separator 5 is also connected by pipeline 7 with heat exchanger 1, on pipeline 7
It is connected with magnetic valve 8.
In the present embodiment, the hot water storage is additionally provided with electric heater unit 10 in boiler 9 in the boiler 9.
In the present embodiment, the motor thermal is specially electric heating tube, and the electric heating tube is shaped as coiled.
Additionally, being provided with multiple temperature sensors 11, pressure sensor 14 and liquid level sensor in the boiler 9
15, the outer wall of boiler 9 is provided with display 12, and temperature sensor 11 is connected by microprocessor with display 12, for right
Water temperature in boiler 9 is monitored, it is ensured that its temperature keeps within the specific limits, pressure sensor 14 and liquid level sensor 15
Can be connected with background computer, be respectively used to detect hydraulic pressure and level condition in boiler 9.
The invention also discloses a kind of steel galvanization spent acid auto purification environment-friendly treatment method, comprise the following steps：
(1) can specifically be passed through to the water heating in boiler 9 using some stack gases of galvanizing equipment in production system
Corresponding heat exchanger is heated, and electric heater unit 10 is additionally provided with storage tank, in case used when needs, after heating
Heating agent, hot water is by heat exchanger 1 to the spent acid heating after the production of steel galvanization anti-corrosion and finished surface processing of rust removing；
(2) spent acid after heating carries out vapor-liquid separation in being passed into vacuum-vapour liquid separator 2, and gaseous steam is entered into
The pure diluted acid of liquid is absorbed as in vavuum pump 13, is entered into cooler 3 and is condensed in case zinc-plated production and application, vacuum-vapour-liquid
The acid pickle of liquid is drained into through discharge outlet in separator 2 carries out crystallization treatment in crystallizer 4, form the frerrous chloride knot of solid-state
Crystal；
(3) mixture in the step (2) after crystallization is separated by filtration device 5 and filters out crystalline solid, remaining useless
Acid is passed into heat exchanger 1 again, is processed again.
Based on above-mentioned, the present invention is based on physical method, optimizes existing Waste acid recovery technology layout, heat energy utilization, point
From, absorb and purification spent acid facility compact, technique is exquisite, safety, using the way of distillation by gaseous pure acid solution with contain
The acid pickle of impurity is separated, and gaseous acid solution forms pure diluted acid after cooling, and left liquid acid pickle is crystallized
After device 4 and filter separator 5, the frerrous chloride crystalline solid of solid-state, above-mentioned pure diluted acid and frerrous chloride crystallizer 4 are formed
Secondary utilization, whole technique realizes environmental purification, energy-saving and emission-reduction and resource regeneration.
As known by the technical knowledge, the present invention can be by other essence without departing from its spirit or the embodiment party of essential feature
Case is realized.Therefore, embodiment disclosed above, for each side, is all merely illustrative, and is not only.Institute
Have within the scope of the present invention or be included in the invention in the change being equal in the scope of the present invention.
Claims (6)
1. a kind of steel galvanization spent acid auto purification environment-friendly disposal system, it is characterised in that including heat exchanger, vacuum-vapor-liquid separation
Device, cooler, crystallizer and filter separator, the water inlet of the heat exchanger are connected with heat source fluid, heat exchanger by water pump
It is connected with vacuum-vapour liquid separator, the steam drain of vacuum-vapour liquid separator is connected by vavuum pump with cooler, vacuum-vapour-liquid
The discharge outlet of separator is also connected with crystallizer, and crystallizer is connected with filter separator, and the heat source fluid is specially using plating
Hot water after the stack gases heating of zinc equipment discharge.
2. a kind of steel galvanization spent acid auto purification environment-friendly disposal system according to claim 1, it is characterised in that：The mistake
The discharge outlet for filtering separator is also connected by pipeline with heat exchanger, and magnetic valve is connected with pipeline.
3. a kind of steel galvanization spent acid auto purification environment-friendly disposal system according to claim 1 and 2, it is characterised in that：Institute
Hot water storage is stated in boiler, electric heater unit is additionally provided with the boiler.
4. a kind of steel galvanization spent acid auto purification environment-friendly disposal system according to claim 3, it is characterised in that：The electricity
Machine thermal is specially electric heating tube, and the electric heating tube is shaped as coiled.
5. a kind of steel galvanization spent acid auto purification environment-friendly disposal system according to claim 4, it is characterised in that：The heat
Multiple temperature sensors, pressure sensor and liquid level sensor are provided with water tank, the outer wall of boiler is provided with display,
Temperature sensor is connected by microprocessor with display.
6. a kind of steel galvanization spent acid auto purification environment-friendly treatment method according to claim 5, it is characterised in that including such as
Lower step：
(1) also set up in storage tank to the water heating in boiler using some stack gases of galvanizing equipment in production system
Have electric heater unit, the heating agent after heating, hot water by heat exchanger to steel galvanization anti-corrosion produce and finished surface rust cleaning at
Spent acid heating after reason；
(2) spent acid after heating is passed into vacuum-vapour liquid separator, and low temperature carries out vapor-liquid separation, gaseous steaming under negative pressure
Vapour, Volatile Gas are entered into vavuum pump and are absorbed as pure diluted acid, enter back into condensation in cooler, are that galvanizing system is used, very
The acid pickle of liquid is drained into through discharge outlet in sky-vapour liquid separator carries out crystallization treatment in crystallizer, form the chlorination of solid-state
Ferrous crystalline solid；
(3) mixture in the step (2) after crystallization is separated by filtration device and filters out crystalline solid, and remaining spent acid is again
It is passed into heat exchanger, is processed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179238.9A CN106830488A (en) | 2017-03-23 | 2017-03-23 | A kind of steel galvanization spent acid auto purification environment-friendly disposal system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710179238.9A CN106830488A (en) | 2017-03-23 | 2017-03-23 | A kind of steel galvanization spent acid auto purification environment-friendly disposal system and method |
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| CN106830488A true CN106830488A (en) | 2017-06-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311365A (en) * | 2017-09-07 | 2017-11-03 | 彭春来 | A kind of steel galvanization quickening liquid ionization removes iron purification environmental-protection processing system and method |
| CN109987642A (en) * | 2019-03-20 | 2019-07-09 | 湖南华菱涟钢薄板有限公司 | A kind of process system producing frerrous chloride and process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1373243A (en) * | 2001-12-31 | 2002-10-09 | 南昌大学 | Process for treating waste pickling liquid of hydrochloric acid by negative-pressure external-circulation evaporation-concentrating crystallization method |
| CN101538072A (en) * | 2009-04-23 | 2009-09-23 | 韩克荣 | Sewage treatment method of galvanization production line |
| CN101570316A (en) * | 2009-05-27 | 2009-11-04 | 无锡市星亿涂装环保设备有限公司 | Method and device for refining and recycling hydrochloric acid from hydrochloric acid pickling waste liquid |
| CN105862053A (en) * | 2016-04-06 | 2016-08-17 | 中冶南方工程技术有限公司 | Regeneration method and system for hydrochloric acid waste liquid |
-
2017
- 2017-03-23 CN CN201710179238.9A patent/CN106830488A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1373243A (en) * | 2001-12-31 | 2002-10-09 | 南昌大学 | Process for treating waste pickling liquid of hydrochloric acid by negative-pressure external-circulation evaporation-concentrating crystallization method |
| CN101538072A (en) * | 2009-04-23 | 2009-09-23 | 韩克荣 | Sewage treatment method of galvanization production line |
| CN101570316A (en) * | 2009-05-27 | 2009-11-04 | 无锡市星亿涂装环保设备有限公司 | Method and device for refining and recycling hydrochloric acid from hydrochloric acid pickling waste liquid |
| CN105862053A (en) * | 2016-04-06 | 2016-08-17 | 中冶南方工程技术有限公司 | Regeneration method and system for hydrochloric acid waste liquid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311365A (en) * | 2017-09-07 | 2017-11-03 | 彭春来 | A kind of steel galvanization quickening liquid ionization removes iron purification environmental-protection processing system and method |
| CN109987642A (en) * | 2019-03-20 | 2019-07-09 | 湖南华菱涟钢薄板有限公司 | A kind of process system producing frerrous chloride and process |
| CN109987642B (en) * | 2019-03-20 | 2022-01-25 | 湖南华菱涟钢特种新材料有限公司 | Process system and process method for producing ferrous chloride |
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Application publication date: 20170613 |