CN105862053B - Hydrochloric acid exhausted liquid reclaiming process and system - Google Patents
Hydrochloric acid exhausted liquid reclaiming process and system Download PDFInfo
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- CN105862053B CN105862053B CN201610208933.9A CN201610208933A CN105862053B CN 105862053 B CN105862053 B CN 105862053B CN 201610208933 A CN201610208933 A CN 201610208933A CN 105862053 B CN105862053 B CN 105862053B
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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
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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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
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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
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Abstract
The present invention relates to a kind of hydrochloric acid exhausted liquid reclaiming process, this method uses spray roasting, into the hydrochloride waste of Venturi preconcentrator, at least partially preheated hydrochloride waste.Further relate to a kind of hydrochloride waste regenerative system, including passing through the sequentially connected roaster of flue, Venturi preconcentrator, absorption tower and at least level-one washing mechanism, it is provided with heat exchange mechanisms to being less than on wherein one section of flue, hydrochloride waste enters each heat exchange mechanisms as refrigerant and flue gas heat exchange, and the refrigerant exit of each heat exchange mechanisms is connect with Venturi preconcentrator.By the way that hydrochloride waste is preheated, hydrochloride waste can be reduced and heat the required heat of concentration in Venturi preconcentrator, to which same amount of baking flue gas can heat more hydrochloride wastes in Venturi preconcentrator, the treatment effeciency of Venturi preconcentrator is effectively improved, while roaster energy expenditure can be reduced.
Description
Technical field
The present invention relates to a kind of hydrochloric acid exhausted liquid reclaiming process and regenerative systems.
Background technology
The hydrochloric acid pickling waste liquor that steel or chemical enterprise generate, generally carries out hydrochloride waste using spray roasting at present
Regeneration treatment.This method there are the problem of have：
(1) hydrochloride waste, which enters, carries out heating concentration in Venturi preconcentrator, roasting is just sprayed into after reaching a certain concentration
It burns in stove and is chemically reacted, this process is needed to provide a large amount of heat and could be realized；This partial heat is mainly by roaster
System provides, and need to expend a large amount of fuel can realize, not meet energy-saving requirement.
(2) the mixed flue gas temperature being discharged from roaster, Venturi preconcentrator is still up to 95~100 DEG C, is passing through
After the cooling of the routine such as absorption tower, washing facility, dust removal process, the flue-gas temperature being discharged from chimney is still up to 80~85 DEG C,
Under conventional ambient temperature conditions, the tail gas of discharge is generally white, misty steam gaseous mixture, and sensory effects are poor, autumn and winter
Section is more very.If above-mentioned hydrochloride waste regeneration unit is closer apart from residential block, tail gas is usually for " white cigarette is billowing " being discharged from chimney
The object that hydrochloride waste regeneration unit nearby residents area resident complains can also be become, can be brought to steel or chemical enterprise larger
Pressure.
Invention content
A kind of hydrochloric acid exhausted liquid reclaiming process of offer of the embodiment of the present invention and regenerative system, can at least solve the portion of the prior art
Divide defect.
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, the method is：Hydrochloride waste is pre- dense in venturi
It is sprayed into roaster after heated concentration in contracting device, the baking flue gas of generation carries out at subsequent regeneration of hydrochloric acid processing and purification
Reason；Into in the hydrochloride waste of Venturi preconcentrator, at least partially preheated hydrochloride waste.
As one of embodiment, the baking flue gas is carried out in subsequent processes, after being carried out to the baking flue gas
In continuous processing procedure, a part of at least within of the hydrochloride waste of the baking flue gas and Venturi preconcentrator to be entered is utilized
It exchanges heat.
As one of embodiment, the subsequent processing includes that the baking flue gas passes through Venturi preconcentrator, inhales successively
It receives tower and at least level-one washing mechanism is handled, wherein baking flue gas is contacted with hydrochloride waste in Venturi preconcentrator
Realize concentration heat exchange, the further cooled flue gas simultaneously HCl in recovered flue gas in absorption tower, by each washing mechanism to cigarette
Gas carries out further cooling dedusting.
As one of embodiment, until being provided with the less than being connected on the flue of first order washing mechanism exhanst gas outlet
One heat exchange mechanisms；Into in the hydrochloride waste of Venturi preconcentrator, at least partially through each first heat exchange mechanisms and cigarette
First preheating hydrochloride waste of gas heat exchange.
Generated as one of embodiment, when flue gas exchanges heat in the first heat exchange mechanisms includes that the cooling of condensed water mixes
Liquid, the part cooling mixed liquid are discharged into first order washing mechanism as cleaning solution and/or are discharged into rinsing water pot as absorption tower
Interior spray liquid.
As one of embodiment, the washing mechanism is multistage；In each washing mechanism after first order washing mechanism, until
It is provided with third heat exchange mechanisms on cycle liquid pipeline less than a wherein washing mechanism；Hydrochloric acid into Venturi preconcentrator is useless
In liquid, also part is to preheat hydrochloride waste with the third that corresponding circulation fluid exchanges heat through third heat exchange mechanisms.
The present embodiments relate to a kind of hydrochloride waste regenerative systems, including pass through the sequentially connected roasting of flue
Stove, Venturi preconcentrator, absorption tower and at least level-one washing mechanism, until less than being provided with first on wherein one section of flue
Heat exchange mechanisms are changed into each first heat exchange mechanisms as refrigerant and flue gas by extracting hydrochloride waste in hydrochloride waste storage tank
The refrigerant exit of heat, each first heat exchange mechanisms is connect with the Venturi preconcentrator.
As one of embodiment, until being arranged less than being connected on the flue of first order washing mechanism exhanst gas outlet
State the first heat exchange mechanisms.
As one of embodiment, each first heat exchange mechanisms all have cooling mixed liquid outlet, each cooling mixing
Liquid outlet is connect with the first order washing mechanism and/or rinsing water pot.
As one of embodiment, the system comprises multistage washing mechanisms；Each institute after the first order washing mechanism
It states in washing mechanism, until less than third heat exchange mechanisms are provided on the cycle liquid pipeline of wherein one washing mechanism, by hydrochloric acid
Hydrochloride waste is extracted in waste tank enters the third heat exchange mechanisms as refrigerant and circulation fluid heat exchange, the third heat exchanger
The refrigerant exit of structure is connect with the Venturi preconcentrator.
The embodiment of the present invention at least realizes following advantageous effect：By preheating hydrochloride waste, hydrochloric acid can be reduced
Waste liquid heated in Venturi preconcentrator concentration needed for heat, that is, reduce hydrochloride waste in Venturi preconcentrator with roasting
The heat exchange amount for burning flue gas has to which same amount of baking flue gas can heat more hydrochloride wastes in Venturi preconcentrator
Effect improves the treatment effeciency of Venturi preconcentrator, that is, improves the efficiency of hydrochloride waste regeneration treatment, while can reduce roaster
Energy expenditure.Based on above-mentioned advantageous effect, the lectotype selection of roaster, Venturi preconcentrator, each washing facility etc. can be made more
It is small, energy consumption is lower, to save equipment construction cost and improvement cost, reduce construction investment.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of the hydrochloride waste regenerative system provided in embodiment 11；
Fig. 2 is the structural schematic diagram of the hydrochloride waste regenerative system provided in embodiment 12；
Fig. 3 is the structural schematic diagram of the hydrochloride waste regenerative system provided in embodiment 13.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained without making creative work it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Embodiment one
The present embodiment is related to a kind of regeneration treating method of hydrochloride waste, includes the following steps：
(1) after hydrochloride waste is directly entered the heating concentration of Venturi preconcentrator 3, through Venturi preconcentrator recycle liquid pump
9 and roaster charging pump 10 pressurize after roaster 1 sprayed into misty drop, drop in roaster 1 after chemical reaction, it is raw
At containing HCl, H2O、O2、CO2、N2With a small amount of Fe2O3The high-temperature flue gas (390~410 DEG C) of powder.
(2) above-mentioned high-temperature flue gas enters in Venturi preconcentrator 3 and exchanges heat with hydrochloride waste, and flue gas is cooled down, removed
Dirt, hydrochloride waste are then heated, and the temperature of flue gas is reduced to 95~100 DEG C.
(3) enter absorption tower 4 from the flue gas that Venturi preconcentrator 3 comes out from bottom, absorption tower 4 sprays into from top and rinses
The rinse water reverse convection of water, high-temperature flue gas and spray carries out a large amount of heat exchange in packing area, and the HCl in flue gas is sprayed
Rinse water absorb, flue-gas temperature is reduced to 85~90 DEG C.
(4) flue gas being discharged by absorption tower 4 enters the washing facilitys such as Venturi scrubber 5, scrubbing tower 6 and is cooled down, removed
Dirt, flue-gas temperature are down to 82~87 DEG C, and air is discharged into from chimney.
In the above method, in step (4), washing facility quantity can be arranged according to actual condition, but that there are problems is as follows：If
Negligible amounts are set, the exhaust temperature of discharge and dustiness etc. are all higher, easily cause environmental pollution；When setting quantity is more, energy consumption
It is higher.Usually, two-stage washing facility is set；In the present embodiment, shape is sequentially connected using Venturi scrubber 5 and scrubbing tower 6
It is washed at two-stage.
Above-mentioned regeneration treating method is spray roasting hydrochloride waste regeneration and treatment technique commonly used in the prior art, is existed
Energy consumption is higher, and the exhaust temperature of smoke stack emission is higher, easy the problems such as forming " white cigarette ".
Corresponding to the above method, the present embodiment also provides a kind of hydrochloride waste regenerative system commonly used in the prior art, should
System includes by the sequentially connected roaster 1 of flue, dedusting mechanism 2, Venturi preconcentrator 3, absorption tower 4 and at least
Level-one washing mechanism.The cinder-discharging port of dedusting mechanism 2 is connect by ash-unloading tube road with 1 middle part of roaster or lower part.Venturi is pre- dense
3 top of contracting device is equipped with hydrochloride waste inlet, and bottom is equipped with concentrating hydrochloric acid waste liquid outlet, and concentrating hydrochloric acid waste liquid outlet passes through
Supply lines are connect with 1 inlet of roaster, and supply lines are equipped with Venturi preconcentrator recycle liquid pump 9 and roaster is fed
Pump 10.Each washing mechanism is equipped with cycle liquid pipeline, realizes recycling for spray liquid；The circulation fluid of first order washing mechanism 5
Pipeline also has a branch and the spraying mechanism on absorption tower 4 to connect, to supply rinse water to absorption tower 4.Afterbody washing mechanism
Exhanst gas outlet be connected with liquid drop separator 7 and chimney 8, will arrange outside the flue gas of processing.
It is general using multistage washing mechanism in above system, to improve the cooling dust removing effects to flue gas.The present embodiment
In, using Venturi scrubber 5 and 6 sequentially connected two-stage washing mechanism of scrubbing tower.Above-mentioned dedusting mechanism 2 is preferably using double
Cyclone dust collectors 2.
Embodiment two
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.It should
Method and the regeneration treating method step of the hydrochloride waste in above-described embodiment one are essentially identical, and specific steps are no longer superfluous herein
It states；It is improved on the basis of method of this method in embodiment one, specially：Hydrochloride waste is in Venturi preconcentrator
It is sprayed into roaster 1 after heated concentration in 3, the baking flue gas of generation carries out subsequent regeneration of hydrochloric acid processing and purified treatment；
Into in the hydrochloride waste of Venturi preconcentrator 3, at least partially preheated hydrochloride waste.
By preheating hydrochloride waste, hydrochloride waste can be reduced and heated needed for concentration in Venturi preconcentrator 3
Heat, that is, reduce hydrochloride waste in the Venturi preconcentrator 3 with the heat exchange amount of baking flue gas, in venturi pre-concentration
Same amount of baking flue gas can heat more hydrochloride wastes in device 3, and the processing effect of Venturi preconcentrator 3 first can be improved
Rate improves the efficiency of hydrochloride waste regeneration treatment, second can reduce by 1 energy expenditure of roaster.
Preferably, the preheating method of above-mentioned hydrochloride waste is：Baking flue gas is carried out in subsequent processes, roasting is utilized
A part at least within for flue gas and the hydrochloride waste of Venturi preconcentrator 3 to be entered exchanges heat, to reach to the part
The purpose that hydrochloride waste is preheated.Above-mentioned subsequent processing includes that the baking flue gas passes through Venturi preconcentrator 3, inhales successively
It receives tower 4 and at least level-one washing mechanism is handled, wherein baking flue gas connects with hydrochloride waste in Venturi preconcentrator 3
It touches and realizes concentration heat exchange, baking flue gas forms certain cooling dedusting effect in heat transfer process, and hydrochloride waste is then heated, inhaled
The HCl in further cooled flue gas and recovered flue gas is received in tower 4, is further cooled down to flue gas by each washing mechanism
Dedusting.
Based on the subsequent treatment process of above-mentioned baking flue gas, using the exhanst gas outlet of wherein any one subsequent processing device
The flue gas to circulate in the flue of connection preheats hydrochloride waste, higher closer to 1 flue-gas temperature of roaster, then preheats
Effect is better；But in view of the needs of the 4 reclaiming hydrochloric acid of corrosivity and absorption tower of HCl heat exchanging equipments in flue gas, generally
The flue gas to circulate between Venturi preconcentrator 3 and absorption tower 4 is not used to exchange heat with hydrochloride waste.Preferably at least in
It is connected on the flue of 5 exhanst gas outlet of first order washing mechanism and is provided with the first heat exchange mechanisms 13, it is pre- dense into venturi
In the hydrochloride waste of contracting device 3, the first preheating hydrochloride waste at least partially through each first heat exchange mechanisms 13 and flue gas heat exchange.If
Washing mechanism has multistage, it is contemplated that is respectively provided with above-mentioned first on the flue for being connected to washing mechanism exhanst gas outlets at different levels and changes
Heat engine structure 13, but increase with series, the temperature of flue gas continuously decreases, and flue gas is also poorer to the pre-heat effect of hydrochloride waste；Also may be used
Consider that above-mentioned first heat exchange mechanisms 13 are arranged on the flue between absorption tower 4 and first order washing mechanism 5.The present embodiment
In, be sequentially connected the two level washing mechanism constituted using by Venturi scrubber 5 and scrubbing tower 6, Venturi scrubber 5 with wash
It washs and above-mentioned first heat exchange mechanisms 13 is set on the flue between tower 6.
Hydrochloride waste is extracted by hydrochloride waste storage tank and is used as refrigerant and flue gas heat exchange into above-mentioned each first heat exchange mechanisms 13,
Realize the purpose preheated to hydrochloride waste.Both the part of waste heat for having recycled baking flue gas (waits entering text to the hydrochloride waste of cold conditions
Room temperature hydrochloride waste in mound in preconcentrator 3) it is preheated, the heat of baking flue gas is made full use of, fume afterheat is reduced
Waste, it is energy-saving；The low temperature for also utilizing hydrochloride waste cools down to baking flue gas, effective moisture reduced in flue gas,
HCl and brown iron oxide granule content, exhaust gas volumn also greatly reduce, and have more apparent dustproof function, can reduce subsequent wash
The operating pressure of mechanism, the discharge index that chimney 8 can be made final are far superior to the requirement of national standard, solve 8 tail gas of chimney row
Put the defect for easily forming " white cigarette ".Based on above-mentioned advantageous effect, roaster 1, Venturi preconcentrator 3, each washing facility can be made
Deng lectotype selection smaller, energy consumption it is lower, to save equipment construction cost and improvement cost, reduce construction investment.
Above-mentioned first heat exchange mechanisms 13 using flue gas heat-exchange unit to be preferred.Flue gas produces in the first heat exchange mechanisms 13 when heat exchange
Life includes the cooling mixed liquid of condensed water, the part cooling mixed liquid can be discharged into first order washing mechanism 5 as cleaning solution and/
Or it is discharged into rinsing water pot as the spray liquid in absorption tower 4.
Embodiment three
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.It should
Method and the regeneration treating method step of the hydrochloride waste in above-described embodiment one are essentially identical, and specific steps are no longer superfluous herein
It states；It is improved on the basis of method of this method in embodiment one, specially：Recycling first order washing mechanism 5 follows
The part at least within that the part of waste heat of ring liquid is used for the hydrochloride waste to entering Venturi preconcentrator 3 preheats, and changes
Circulation fluid after heat sprays into the first order washing mechanism 5 and/or absorption tower 4.I.e. in the cycle liquid pipe of first order washing mechanism 5
Setting the second heat exchange mechanisms 15 in road extract hydrochloride waste by hydrochloride waste storage tank and enter above-mentioned second heat exchange mechanisms 15 as cold
Matchmaker and the circulation fluid of the first order washing mechanism 5 exchange heat, and achieve the purpose that preheat hydrochloride waste, and the hydrochloric acid of part preheating is useless
Liquid is the second preheating hydrochloride waste.Above-mentioned second heat exchange mechanisms 15 using water water- to-water heat exchanger to be preferred.
Using the above method, hydrochloride waste of the part of waste heat to cold conditions of the circulation fluid of first order washing mechanism 5 has been recycled
(the room temperature hydrochloride waste in Venturi preconcentrator 3 to be entered) is preheated, and the heat of circulation fluid is made full use of, and reduces cycle
The waste of fluid residual heat, it is energy-saving, and the efficiency of regeneration of hydrochloric acid recycling can be improved；The low temperature pair of hydrochloride waste is utilized simultaneously
The circulation fluid of first order washing mechanism 5 cools down, and the circulation fluid of low temperature sprays into first order washing mechanism 5 or in absorption tower 4
When, washing effect of the circulation fluid in first order washing mechanism 5 can be improved and in absorption tower 4 in the heat exchange amount bigger with flue gas
Assimilation effect, effectively reduce the moisture in flue gas, HCl and brown iron oxide granule content, exhaust gas volumn also greatly reduce, cigarette can be made
The final discharge index of chimney 8 is far superior to the requirement of national standard, solves the defect that 8 exhaust emissions of chimney easily forms " white cigarette ".
Based on above-mentioned advantageous effect, the lectotype selection smaller, energy consumption of roaster 1, Venturi preconcentrator 3, each washing facility etc. can be made
It is lower, to save equipment construction cost and improvement cost, reduce construction investment.
Example IV
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.It should
Method and the regeneration treating method step of the hydrochloride waste in above-described embodiment one are essentially identical, and specific steps are no longer superfluous herein
It states；It is improved on the basis of method of this method in embodiment one, specially：Using multistage washing mechanism, the first order
In each washing mechanism after washing mechanism 5, until less than third heat exchange is provided on the cycle liquid pipeline of a wherein washing mechanism
Mechanism 14；Into in the hydrochloride waste of Venturi preconcentrator 3, at least partially through each third heat exchange mechanisms 14 and corresponding cycle
The third of liquid heat exchange preheats hydrochloride waste.Above-mentioned each third heat exchange mechanisms 14 using water water- to-water heat exchanger to be preferred.
For washing mechanism quantity more than three-level, the circulation fluid of every level-one washing mechanism that can in the second level and later
Above-mentioned third heat exchange mechanisms 14 are respectively provided on pipeline, but flue-gas temperature is lower more rearward, flue-gas temperature is corresponding also lower, then at different levels
The temperature of the circulation fluid of washing mechanism is also lower, poorer to the pre-heat effect of hydrochloride waste.In the present embodiment, using by venturi
Washer 5 is sequentially connected the two level washing mechanism of composition with scrubbing tower 6, is arranged on the cycle liquid pipeline of the scrubbing tower 6 above-mentioned
Third heat exchange mechanisms 14.
Hydrochloride waste is extracted by hydrochloride waste storage tank and is used as refrigerant and flue gas heat exchange into above-mentioned each third heat exchange mechanisms 14,
Realize the purpose preheated to hydrochloride waste.Using the above method, the cycle of the second level and washing mechanisms at different levels later has been recycled
The part of waste heat of liquid preheats the hydrochloride waste (the room temperature hydrochloride waste in Venturi preconcentrator 3 to be entered) of cold conditions,
The heat of circulation fluid is made full use of, the waste of cycle fluid residual heat is reduced, it is energy-saving, and the effect of regeneration of hydrochloric acid recycling can be improved
Rate；The low temperature that hydrochloride waste is utilized simultaneously cools down to the circulation fluid of corresponding each washing mechanism, the circulation fluid spray of low temperature
When entering in corresponding each washing mechanism, washing effect of the circulation fluid in each washing mechanism can be improved in the heat exchange amount bigger with flue gas
Fruit improves the dedusting cooling effect of each washing mechanism, and exhaust gas volumn also greatly reduces, and the discharge index that chimney 8 can be made final is much
Better than the requirement of national standard, the defect that 8 exhaust emissions of chimney easily forms " white cigarette " is solved.Based on above-mentioned advantageous effect, can make
Lectotype selection smaller, the energy consumption of roaster 1, Venturi preconcentrator 3, each washing facility etc. are lower, to save equipment construction
Cost and improvement cost reduce construction investment.
Embodiment five
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.This
The technical solution of the method hydrochloric acid exhausted liquid reclaiming process in two and the hydrochloric acid exhausted liquid reclaiming process in embodiment three in conjunction with the embodiments,
I.e.：Baking flue gas is carried out in subsequent processes, the hydrochloride waste of baking flue gas and Venturi preconcentrator 3 to be entered is utilized
A portion exchange heat, obtain first preheating hydrochloride waste；More than the part for recycling the circulation fluid of first order washing mechanism 5
The a portion of heat for the hydrochloride waste to entering Venturi preconcentrator 3 preheats, and it is useless to obtain the second preheating hydrochloric acid
Liquid, the circulation fluid after heat exchange spray into the first order washing mechanism 5 and/or absorption tower 4.
Above-mentioned baking flue gas and the specific implementation mode that hydrochloride waste exchanges heat are identical as the mode in embodiment two, and above-mentioned
The circulation fluid of level-one washing mechanism 5 and the specific implementation mode that hydrochloride waste exchanges heat are identical as the mode in embodiment three, herein
It repeats no more.
As shown in Figure 1, this method is used is sequentially connected the two level rinsing maching constituted by Venturi scrubber 5 and scrubbing tower 6
The first heat exchange mechanisms 13 are arranged on the flue between Venturi scrubber 5 and scrubbing tower 6, in Venturi scrubber 5 in structure
Cycle liquid pipeline on the second heat exchange mechanisms 15 are set；This method is as follows：
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction section hydrochloride waste, the part hydrochloride waste
The first preheating hydrochloride waste is obtained with flue gas heat exchange；Second heat exchange mechanisms are entered by hydrochloride waste storage tank extraction section hydrochloride waste
In 15, the circulation fluid of the part hydrochloride waste and Venturi scrubber 5 exchanges heat to obtain the second preheating hydrochloride waste.
Above-mentioned first preheating hydrochloride waste and the second preheating hydrochloride waste enter in Venturi preconcentrator 3, in venturi
The high temperature mixed flue gas counter current contact being discharged in preconcentrator 3 and by roaster 1, hydrochloride waste absorb HCl and quilt in flue gas
Flue gas, the partial moisture in hydrochloride waste are evaporated, to realize heating concentration.
(2) hydrochloride waste after concentrating is injected into roasting through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10
In stove 1, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as by chemical reaction
Fe2O3Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto the discharge of 1 bottom of roaster, and high temperature mixed flue gas contains HCl, H2O、
O2、CO2、N2And Fe2O3The temperature of powder etc., high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after the processing of double-cyclone dust collector 2, about 50% Fe in flue gas2O3Powder is by returning
Expects pipe returns to the bottom discharge of roaster 1.Subsequent high-temperature flue gas enter in Venturi preconcentrator 3 cooled down, dedusting, high temperature
The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) high-temperature flue gas come out from Venturi preconcentrator 3 enters absorption tower 4, and 4 top of absorption tower sprays into a part
The rinse water of rinse water after the pressurization of Venturi scrubber recycle liquid pump 11, flue gas and spray reverse convection in absorption tower 4,
Heat exchange and absorbing reaction are carried out in packing area, and the rinse water that about 99% HCl is sprayed in flue gas absorbs, and forms regenerated acid row
Go out, and flue-gas temperature is then reduced to 85~90 DEG C.
(5) flue gas come out from absorption tower 4 enters Venturi scrubber 5, by extracting hydrochloride waste in hydrochloride waste storage tank
It is passed through in the second heat exchange mechanisms 15 as refrigerant and Venturi scrubber circulation fluid is cooled down, circulation fluid scripture after cooling mound
In washer recycle liquid pump 11 pressurize after spray into the top of Venturi scrubber 5 cooled down to the flue gas entered from bottom, dedusting.
Wherein, in the second heat exchange mechanisms 15, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, circulation fluid temperature by 70~
75 DEG C are reduced to 38~42 DEG C.After 38~42 DEG C of Venturi scrubber circulation fluid spray, Venturi scrubber 5 goes out
Mouth flue-gas temperature is reduced to 70~75 DEG C by 85~90 DEG C；
(6) flue gas enters the first heat exchange mechanisms 13 after being come out from Venturi scrubber 5, by the hydrochloric acid in hydrochloride waste storage tank
Waste liquid is passed through in the first heat exchange mechanisms 13 as refrigerant and is cooled down to flue gas.Flue gas by the first heat exchange mechanisms 13 top into
Enter, exhaust gas conveying fan and scrubbing tower 6 are discharged by lower part；Hydrochloride waste enters from the lower part of the first heat exchange mechanisms 13, from
It flows out on top；Flue gas cooling generate condensed water then from the bottom of the first heat exchange mechanisms 13 be discharged into Venturi scrubber 5 (or rinsing
Water pot) in.Through heat exchange, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, and flue-gas temperature is reduced to by 70~75 DEG C
45~50 DEG C, during this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Particle and HCl remnants are also reduced
About 50%, exhaust gas volumn also reduces about 30~40%.
(7) flue gas after cooling enters scrubbing tower 6, further cooling, dedusting, 6 exiting flue gas of scrubbing tower in scrubbing tower 6
Temperature is reduced to 40~45 DEG C, is discharged by chimney 8 after the processing of liquid drop separator 7, without " white cigarette " phenomenon.
Embodiment six
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.This
The technical solution of the method hydrochloric acid exhausted liquid reclaiming process in the hydrochloric acid exhausted liquid reclaiming process and example IV in two in conjunction with the embodiments,
I.e.：Baking flue gas is carried out in subsequent processes, the hydrochloride waste of baking flue gas and Venturi preconcentrator 3 to be entered is utilized
A portion exchange heat, obtain first preheating hydrochloride waste；Using multistage washing mechanism, first order washing mechanism 5 it
In each washing mechanism afterwards, until less than third heat exchange mechanisms 14 are provided on the cycle liquid pipeline of a wherein washing mechanism, enter
In the hydrochloride waste of Venturi preconcentrator 3, at least partially exchange heat with corresponding circulation fluid through each third heat exchange mechanisms 14
Three preheating hydrochloride wastes.
Above-mentioned baking flue gas and the specific implementation mode that hydrochloride waste exchanges heat are identical as the mode in embodiment two, and above-mentioned
Two level and the circulation fluid of washing mechanisms at different levels later and the side in the specific implementation mode and example IV of hydrochloride waste heat exchange
Formula is identical, and details are not described herein again.
As shown in Fig. 2, this method is used is sequentially connected the two level rinsing maching constituted by Venturi scrubber 5 and scrubbing tower 6
The first heat exchange mechanisms 13 are arranged on the flue between Venturi scrubber 5 and scrubbing tower 6, in the cycle of scrubbing tower 6 in structure
Third heat exchange mechanisms 14 are set on liquid pipeline；This method is as follows：
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction section hydrochloride waste, the part hydrochloride waste
The first preheating hydrochloride waste is obtained with flue gas heat exchange；Third heat exchange mechanisms are entered by hydrochloride waste storage tank extraction section hydrochloride waste
In 14, the circulation fluid of the part hydrochloride waste and scrubbing tower 6 exchanges heat to obtain third preheating hydrochloride waste.
Above-mentioned first preheating hydrochloride waste enters with third preheating hydrochloride waste in Venturi preconcentrator 3, in venturi
The high temperature mixed flue gas counter current contact being discharged in preconcentrator 3 and by roaster 1, hydrochloride waste absorb HCl and quilt in flue gas
Flue gas, the partial moisture in hydrochloride waste are evaporated, to realize heating concentration.
(2) hydrochloride waste after concentrating is injected into roasting through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10
In stove 1, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as by chemical reaction
Fe2O3Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto the discharge of 1 bottom of roaster, and high temperature mixed flue gas contains HCl, H2O、
O2、CO2、N2And Fe2O3The temperature of powder etc., high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after the processing of double-cyclone dust collector 2, about 50% Fe in flue gas2O3Powder is by returning
Expects pipe returns to the bottom discharge of roaster 1.Subsequent high-temperature flue gas enter in Venturi preconcentrator 3 cooled down, dedusting, high temperature
The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) high-temperature flue gas come out from Venturi preconcentrator 3 enters absorption tower 4, and 4 top of absorption tower sprays into a part
The rinse water of rinse water after the pressurization of Venturi scrubber recycle liquid pump 11, flue gas and spray reverse convection in absorption tower 4,
Heat exchange and absorbing reaction are carried out in packing area, and the rinse water that about 99% HCl is sprayed in flue gas absorbs, and forms regenerated acid row
Go out, and flue-gas temperature is then reduced to 85~90 DEG C.
(5) flue gas come out from absorption tower 4 enters Venturi scrubber 5, adds by Venturi scrubber recycle liquid pump 11
Circulation fluid after pressure is sprayed into from the time mouth of Venturi scrubber 5, and flue gas carries out heat exchange with circulation fluid, is further dropped
Temperature, dedusting, flue-gas temperature are reduced to 82~87 DEG C；
(6) flue gas enters the first heat exchange mechanisms 13 after being come out from Venturi scrubber 5, by the hydrochloric acid in hydrochloride waste storage tank
Waste liquid is passed through in the first heat exchange mechanisms 13 as refrigerant and is cooled down to flue gas.Flue gas by the first heat exchange mechanisms 13 top into
Enter, exhaust gas conveying fan (having illustrated, do not mark) and scrubbing tower 6 are discharged by lower part；Hydrochloride waste is from the first heat exchange mechanisms
13 lower part enters, and is flowed out from top；The condensed water that flue gas cooling generates then is discharged into Wen Qiu from the bottom of the first heat exchange mechanisms 13
In in washer 5 (or rinsing water pot).Through heat exchange, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, flue-gas temperature
63~68 DEG C are reduced to by 82~87 DEG C, during this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Particle
About 50% is also reduced with HCl remnants, exhaust gas volumn also reduces about 30~40%.
(7) flue gas after cooling enters scrubbing tower 6, and the is passed through as refrigerant by extracting hydrochloride waste in hydrochloride waste storage tank
Scrubbing tower circulation fluid is cooled down in three heat exchange mechanisms 14, the washed tower recycle liquid pump 12 of circulation fluid after cooling sprays after pressurizeing
Enter the top of scrubbing tower 6 cooled down to the flue gas entered from bottom, dedusting.Wherein, in third heat exchange mechanisms 14, hydrochloride waste
Temperature is increased to 36~40 DEG C by 25~35 DEG C, and circulation fluid temperature is reduced to 38~42 DEG C by 50~55 DEG C, is passing through 38~42
DEG C scrubbing tower circulation fluid spray after, 6 exit gas temperature of scrubbing tower is reduced to 40~42 DEG C by 63~68 DEG C, through drop point
It is discharged by chimney 8 from after the processing of device 7, without " white cigarette " phenomenon.
Embodiment seven
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, can at least solve the subproblem of the prior art.This
Method in conjunction with the embodiments two, the technical solution of embodiment three and the hydrochloric acid exhausted liquid reclaiming process in example IV, i.e.,：To roasting cigarette
Gas carries out in subsequent processes, utilizes baking flue gas and wherein one of the hydrochloride waste of Venturi preconcentrator 3 to be entered
Divide and exchange heat, obtains the first preheating hydrochloride waste；Using multistage washing mechanism, the circulation fluid of recycling first order washing mechanism 5
Part of waste heat be used to preheat a portion of hydrochloride waste for entering Venturi preconcentrator 3, it is pre- to obtain second
Hot hydrochloride waste, the circulation fluid after heat exchange spray into the first order washing mechanism 5 and/or absorption tower 4；First order washing mechanism 5
In each washing mechanism later, until less than third heat exchange mechanisms 14 are provided on the cycle liquid pipeline of a wherein washing mechanism, into
In the hydrochloride waste for entering Venturi preconcentrator 3, at least partially exchange heat with corresponding circulation fluid through each third heat exchange mechanisms 14
Third preheats hydrochloride waste.
Above-mentioned baking flue gas and the specific implementation mode that hydrochloride waste exchanges heat are identical as the mode in embodiment two, and above-mentioned
The circulation fluid of level-one washing mechanism 5 and the specific implementation mode that hydrochloride waste exchanges heat are identical as the mode in embodiment three, above-mentioned
The circulation fluid of the second level and washing mechanisms at different levels later in the specific implementation mode and example IV of hydrochloride waste heat exchange
Mode is identical, and details are not described herein again.
As shown in figure 3, this method is used is sequentially connected the two level rinsing maching constituted by Venturi scrubber 5 and scrubbing tower 6
The first heat exchange mechanisms 13 are arranged on the flue between Venturi scrubber 5 and scrubbing tower 6, in Venturi scrubber 5 in structure
Cycle liquid pipeline on the second heat exchange mechanisms 15 are set, third heat exchange mechanisms 14 are set on the cycle liquid pipeline of scrubbing tower 6；This
Method is as follows：
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction section hydrochloride waste, the part hydrochloride waste
The first preheating hydrochloride waste is obtained with flue gas heat exchange；Second heat exchange mechanisms are entered by hydrochloride waste storage tank extraction section hydrochloride waste
In 15, the circulation fluid of the part hydrochloride waste and Venturi scrubber 5 exchanges heat to obtain the second preheating hydrochloride waste；By hydrochloride waste
Storage tank extraction section hydrochloride waste enters in third heat exchange mechanisms 14, and the circulation fluid of the part hydrochloride waste and scrubbing tower 6 exchanges heat
Obtain third preheating hydrochloride waste.
It is pre- dense that above-mentioned first preheating hydrochloride waste, the second preheating hydrochloride waste and third preheating hydrochloride waste enter venturi
In contracting device 3, the high temperature mixed flue gas counter current contact being discharged in Venturi preconcentrator 3 and by roaster 1, hydrochloride waste absorbs
HCl in flue gas and by flue gas, the partial moisture in hydrochloride waste is evaporated, to realize heating concentration.
(2) hydrochloride waste after concentrating is injected into roasting through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10
In stove 1, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as by chemical reaction
Fe2O3Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto the discharge of 1 bottom of roaster, and high temperature mixed flue gas contains HCl, H2O、
O2、CO2、N2And Fe2O3The temperature of powder etc., high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after the processing of double-cyclone dust collector 2, about 50% Fe in flue gas2O3Powder is by returning
Expects pipe returns to the bottom discharge of roaster 1.Subsequent high-temperature flue gas enter in Venturi preconcentrator 3 cooled down, dedusting, high temperature
The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) high-temperature flue gas come out from Venturi preconcentrator 3 enters absorption tower 4, and 4 top of absorption tower sprays into a part
The rinse water of rinse water after the pressurization of Venturi scrubber recycle liquid pump 11, flue gas and spray reverse convection in absorption tower 4,
Heat exchange and absorbing reaction are carried out in packing area, and the rinse water that about 99% HCl is sprayed in flue gas absorbs, and forms regenerated acid row
Go out, and flue-gas temperature is then reduced to 85~90 DEG C.
(5) flue gas come out from absorption tower 4 enters Venturi scrubber 5, by extracting hydrochloride waste in hydrochloride waste storage tank
It is passed through in the second heat exchange mechanisms 15 as refrigerant and Venturi scrubber circulation fluid is cooled down, circulation fluid scripture after cooling mound
In washer recycle liquid pump 11 pressurize after spray into the top of Venturi scrubber 5 cooled down to the flue gas entered from bottom, dedusting.
Wherein, in the second heat exchange mechanisms 15, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, circulation fluid temperature by 70~
75 DEG C are reduced to 38~42 DEG C.After 38~42 DEG C of Venturi scrubber circulation fluid spray, Venturi scrubber 5 goes out
Mouth flue-gas temperature is reduced to 70~75 DEG C by 85~90 DEG C；
(6) flue gas enters the first heat exchange mechanisms 13 after being come out from Venturi scrubber 5, by the hydrochloric acid in hydrochloride waste storage tank
Waste liquid is passed through in the first heat exchange mechanisms 13 as refrigerant and is cooled down to flue gas.Flue gas by the first heat exchange mechanisms 13 top into
Enter, exhaust gas conveying fan and scrubbing tower 6 are discharged by lower part；Hydrochloride waste enters from the lower part of the first heat exchange mechanisms 13, from
It flows out on top；Flue gas cooling generate condensed water then from the bottom of the first heat exchange mechanisms 13 be discharged into Venturi scrubber 5 (or rinsing
Water pot) in.Through heat exchange, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, and flue-gas temperature is reduced to by 70~75 DEG C
45~50 DEG C, during this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Particle and HCl remnants are also reduced
About 50%, exhaust gas volumn also reduces about 30~40%.
(7) flue gas after cooling enters scrubbing tower 6, and the is passed through as refrigerant by extracting hydrochloride waste in hydrochloride waste storage tank
Scrubbing tower circulation fluid is cooled down in three heat exchange mechanisms 14, the washed tower recycle liquid pump 12 of circulation fluid after cooling sprays after pressurizeing
Enter the top of scrubbing tower 6 cooled down to the flue gas entered from bottom, dedusting.Wherein, in third heat exchange mechanisms 14, hydrochloride waste
Temperature is increased to 35~39 DEG C by 25~35 DEG C, and circulation fluid temperature is reduced to 38~42 DEG C by 40~45 DEG C, is passing through 38~42
DEG C scrubbing tower circulation fluid spray after, 6 exit gas temperature of scrubbing tower reduce by 40~42 DEG C, through liquid drop separator 7 processing after
It is discharged by chimney 8, without " white cigarette " phenomenon.
Embodiment eight
The present embodiment is related to a kind of hydrochloride waste regenerative system, the hydrochloride waste regeneration that this system provides in embodiment one
On the basis of system structure, until less than the first heat exchange mechanisms 13 are provided on wherein one section of flue, by hydrochloride waste storage tank
Interior extraction hydrochloride waste enters each first heat exchange mechanisms 13 and refrigerant and flue gas heat exchange, the refrigerant of each first heat exchange mechanisms 13 is used as to go out
Mouth is connect with the hydrochloride waste inlet of Venturi preconcentrator 3.
Flue, Venturi preconcentrator 3 and suction that can be between double-cyclone dust collector 2 and Venturi preconcentrator 3
It receives between the flue between tower 4, the flue between absorption tower 4 and first order washing mechanism 5, adjacent two washing mechanism
Flue, one of in the flue between afterbody washing mechanism and chimney 8 or on multiple flues
Above-mentioned first heat exchange mechanisms 13 are set, it is higher closer to 1 flue-gas temperature of roaster, then it is better to the pre-heat effect of hydrochloride waste.
But it in view of the needs of the 4 reclaiming hydrochloric acid of corrosivity and absorption tower of HCl heat exchanging equipments in flue gas, does not use in text generally
The flue gas to circulate between preconcentrator 3 and absorption tower 4 in mound exchanges heat with hydrochloride waste.Preferably at least in being connected to first
The first heat exchange mechanisms 13 are provided on the flue of grade 5 exhanst gas outlet of washing mechanism, into the hydrochloric acid of Venturi preconcentrator 3
In waste liquid, the first preheating hydrochloride waste at least partially through each first heat exchange mechanisms 13 and flue gas heat exchange.If washing mechanism has
It is multistage, it is contemplated that above-mentioned first heat exchange mechanisms 13 are respectively provided on the flue for being connected to washing mechanism exhanst gas outlets at different levels,
But increase with series, the temperature of flue gas continuously decreases, and flue gas is also poorer to the pre-heat effect of hydrochloride waste；It also contemplates for absorbing
Above-mentioned first heat exchange mechanisms 13 are set on the flue between tower 4 and first order washing mechanism 5.In the present embodiment, using by
Venturi scrubber 5 is sequentially connected the two level washing mechanism of composition with scrubbing tower 6, between Venturi scrubber 5 and scrubbing tower 6
Flue on above-mentioned first heat exchange mechanisms 13 are set.
Above-mentioned first heat exchange mechanisms 13 using flue gas heat-exchange unit to be preferred.Flue gas produces in the first heat exchange mechanisms 13 when heat exchange
Life includes the cooling mixed liquid of condensed water, the part cooling mixed liquid can be discharged into first order washing mechanism 5 as cleaning solution and/
Or it is discharged into rinsing water pot as the spray liquid in absorption tower 4.
Embodiment nine
The present embodiment is related to a kind of hydrochloride waste regenerative system, the hydrochloride waste regeneration that this system provides in embodiment one
On the basis of system structure, in being provided with the second heat exchange mechanisms 15 on the cycle liquid pipeline of first order washing mechanism 5, described second
The refrigerant inlet of heat exchange mechanisms 15 is connect with hydrochloride waste storage tank, and refrigerant exit is connect with the Venturi preconcentrator 3；It is described
The circulation fluid tube outlet end of second level washing mechanism is connected to the first order washing mechanism 5 and/or absorption tower 4.Above-mentioned second
Heat exchange mechanisms 15 using water water- to-water heat exchanger to be preferred.
Embodiment ten
The present embodiment is related to a kind of hydrochloride waste regenerative system, the hydrochloride waste regeneration that this system provides in embodiment one
On the basis of system structure, using multistage washing mechanism, in each washing mechanism after first order washing mechanism 5, until being less than it
In a washing mechanism cycle liquid pipeline on be provided with third heat exchange mechanisms 14；Into the hydrochloride waste of Venturi preconcentrator 3
In, at least partially hydrochloride waste is preheated with the third that corresponding circulation fluid exchanges heat through each third heat exchange mechanisms 14.
In the present embodiment, using Venturi scrubber 5 and 6 sequentially connected two-stage washing mechanism of scrubbing tower, in scrubbing tower 6
Cycle liquid pipeline on be provided with above-mentioned third heat exchange mechanisms 14.
Above-mentioned third heat exchange mechanisms 14 using water water- to-water heat exchanger to be preferred.
Embodiment 11
Such as Fig. 1, the present embodiment is related to a kind of hydrochloride waste regenerative system, this system in conjunction with the embodiments eight in embodiment nine
The structure of the hydrochloride waste regenerative system provided, i.e.,：It is provided with the first heat exchange mechanisms to being less than on wherein one section of flue
13, by hydrochloride waste storage tank extract hydrochloride waste enter each first heat exchange mechanisms 13 be used as refrigerant and flue gas heat exchange, each first
The refrigerant exit of heat exchange mechanisms 13 is connect with the hydrochloride waste inlet of Venturi preconcentrator 3；In first order washing mechanism 5
Cycle liquid pipeline on be provided with the second heat exchange mechanisms 15, refrigerant inlet and the hydrochloride waste storage tank of second heat exchange mechanisms 15
Connection, refrigerant exit are connect with the Venturi preconcentrator 3.
The set-up mode corresponding in embodiment eight such as installation position, concrete structure about the first heat exchange mechanisms 13 and knot
Structure is identical, and details are not described herein again.
Embodiment 12
Such as Fig. 2, the present embodiment is related to a kind of hydrochloride waste regenerative system, this system in conjunction with the embodiments eight in embodiment ten
The structure of the hydrochloride waste regenerative system provided, i.e.,：It is provided with the first heat exchange mechanisms to being less than on wherein one section of flue
13, by hydrochloride waste storage tank extract hydrochloride waste enter each first heat exchange mechanisms 13 be used as refrigerant and flue gas heat exchange, each first
The refrigerant exit of heat exchange mechanisms 13 is connect with the hydrochloride waste inlet of Venturi preconcentrator 3；Using multistage washing mechanism,
In each washing mechanism after first order washing mechanism 5, until less than being provided with the on the cycle liquid pipeline of a wherein washing mechanism
The refrigerant inlet of three heat exchange mechanisms 14, each third heat exchange mechanisms 14 is connect with hydrochloride waste storage tank, refrigerant exit with
The Venturi preconcentrator 3 connects.
Installation position, concrete structure about the first heat exchange mechanisms 13 and third heat exchange mechanisms 14 etc. in embodiment eight and
Corresponding set-up mode and structure in embodiment ten is identical, and details are not described herein again.
Embodiment 13
Such as Fig. 3, the present embodiment is related to a kind of hydrochloride waste regenerative system, this system in conjunction with the embodiments eight, embodiment nine and
The structure of hydrochloride waste regenerative system provided in embodiment ten, i.e.,：To less than being provided with the on wherein one section of flue
One heat exchange mechanisms 13 are changed as refrigerant with flue gas by extracting hydrochloride waste in hydrochloride waste storage tank into each first heat exchange mechanisms 13
The refrigerant exit of heat, each first heat exchange mechanisms 13 is connect with the hydrochloride waste inlet of Venturi preconcentrator 3；Using multistage
Washing mechanism, in being provided with the second heat exchange mechanisms 15, second heat exchange mechanisms on the cycle liquid pipeline of first order washing mechanism 5
15 refrigerant inlet is connect with hydrochloride waste storage tank, and refrigerant exit is connect with the Venturi preconcentrator 3；First order rinsing maching
In each washing mechanism after structure 5, until less than third heat exchange mechanisms 14 are provided on the cycle liquid pipeline of a wherein washing mechanism,
The refrigerant inlet of each third heat exchange mechanisms 14 is connect with hydrochloride waste storage tank, and refrigerant exit is pre- dense with the venturi
Contracting device 3 connects.
Installation position, concrete structure about the first heat exchange mechanisms 13 and third heat exchange mechanisms 14 etc. in embodiment eight and
Corresponding set-up mode and structure in embodiment ten is identical, and details are not described herein again.
Each hydrochloride waste regenerative system provided in above-described embodiment eight to embodiment 13 is used equally for implementing
Each hydrochloric acid exhausted liquid reclaiming process provided in example two to embodiment seven, can obtain corresponding technique effect, details are not described herein again.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (6)
1. a kind of hydrochloric acid exhausted liquid reclaiming process, the method are：Hydrochloride waste is in Venturi preconcentrator after heated concentration
It sprays into roaster, the baking flue gas of generation carries out subsequent regeneration of hydrochloric acid processing and purified treatment, which is characterized in that enters text
In mound in the hydrochloride waste of preconcentrator, at least partially preheated hydrochloride waste；
Include that the baking flue gas passes through Venturi preconcentrator, absorption tower successively to the subsequent processing that the baking flue gas carries out
And at least level-one washing mechanism is handled, wherein baking flue gas contacts realization with hydrochloride waste in Venturi preconcentrator
Concentration heat exchange, the further cooled flue gas simultaneously HCl in recovered flue gas in absorption tower, by each washing mechanism to flue gas into
Row further cooling dedusting；
It is provided with the first heat exchange mechanisms to being less than on the flue for being connected to first order washing mechanism exhanst gas outlet；Into literary mound
In preconcentrator hydrochloride waste in, at least partially the first preheating hydrochloric acid through each first heat exchange mechanisms and flue gas heat exchange
Waste liquid.
2. hydrochloric acid exhausted liquid reclaiming process according to claim 1, it is characterised in that：Flue gas exchanges heat in the first heat exchange mechanisms
When generate include condensed water cooling mixed liquid, which is discharged into first order washing mechanism as cleaning solution
And/or it is discharged into rinsing water pot as the spray liquid in absorption tower.
3. hydrochloric acid exhausted liquid reclaiming process according to claim 1, it is characterised in that：The washing mechanism is multistage；First
In each washing mechanism after grade washing mechanism, until less than third heat exchange is provided on the cycle liquid pipeline of a wherein washing mechanism
Mechanism；Into in the hydrochloride waste of Venturi preconcentrator, also part is to exchange heat with corresponding circulation fluid through third heat exchange mechanisms
Third preheat hydrochloride waste.
4. a kind of hydrochloride waste regenerative system, including pass through the sequentially connected roaster of flue, Venturi preconcentrator, suction
Receive tower and at least level-one washing mechanism, it is characterised in that：The first heat exchange mechanisms are provided with to being less than on wherein one section of flue,
Enter each first heat exchange mechanisms as refrigerant and flue gas heat exchange by extracting hydrochloride waste in hydrochloride waste storage tank, each described the
The refrigerant exit of one heat exchange mechanisms is connect with the Venturi preconcentrator；
It is provided with first heat exchange mechanisms to being less than on the flue for being connected to first order washing mechanism exhanst gas outlet.
5. hydrochloride waste regenerative system according to claim 4, it is characterised in that：Each first heat exchange mechanisms all have
Cooling mixed liquid exports, and each cooling mixed liquid outlet is connect with the first order washing mechanism and/or rinsing water pot.
6. hydrochloride waste regenerative system according to claim 4, it is characterised in that：The system comprises multistage rinsing machings
Structure；In each washing mechanism after the first order washing mechanism, until less than the circulation fluid of wherein one washing mechanism
It is provided with third heat exchange mechanisms on pipeline, enters the third heat exchange mechanisms conduct by extracting hydrochloride waste in hydrochloride waste storage tank
Refrigerant exchanges heat with circulation fluid, and the refrigerant exit of the third heat exchange mechanisms is connect with the Venturi preconcentrator.
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| EP3747530A1 (en) * | 2019-06-06 | 2020-12-09 | CMI UVK GmbH | System for cleaning an off-gas, comprising an acid component, and/or for regenerating an acid component comprised in an off-gas, method |
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| CN106422680B (en) * | 2016-11-22 | 2022-09-09 | 杭州东日节能技术有限公司 | Smelting flue gas purification treatment device and method with byproduct sulfuric acid of more than 40% |
| CN106830488A (en) * | 2017-03-23 | 2017-06-13 | 彭春来 | A kind of steel galvanization spent acid auto purification environment-friendly disposal system and method |
| CN107010598B (en) * | 2017-04-24 | 2023-08-11 | 鞍山创鑫环保科技股份有限公司 | High-concentration acid washing waste liquid regeneration process and system |
| CN107140602B (en) * | 2017-04-24 | 2023-08-15 | 鞍山创鑫环保科技股份有限公司 | System and method for regenerating red smoke-free waste liquid from small high-concentration acid washing |
| CN107445231A (en) * | 2017-08-25 | 2017-12-08 | 金川集团股份有限公司 | A kind of device of acid waste water concentrate emission reduction |
| CN107555511A (en) * | 2017-08-25 | 2018-01-09 | 金川集团股份有限公司 | A kind of device of acid waste water evaporation emission reduction |
| CN109205561B (en) * | 2018-09-25 | 2020-10-30 | 中宁县峰之源农业发展有限公司 | Industrial concentrated hydrochloric acid recovery method |
| CN111809191A (en) * | 2020-06-28 | 2020-10-23 | 中冶南方工程技术有限公司 | Method and system for regenerating hydrochloric acid waste liquid based on fluidized bed method |
| CN112620232A (en) * | 2020-12-10 | 2021-04-09 | 华菱安赛乐米塔尔汽车板有限公司 | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler |
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| US4197139A (en) * | 1978-08-23 | 1980-04-08 | Hjersted Norman B | Process for the reclamation of acid from spent pickle liquor |
| JPS59169902A (en) * | 1983-03-14 | 1984-09-26 | Tadayoshi Karasawa | Improvement in procedures for waste acid purification |
| CN1851320B (en) * | 2006-04-28 | 2010-05-12 | 中冶南方工程技术有限公司 | Hydrochloride waste regenerating process for spray roasting |
| CN104344741B (en) * | 2014-10-28 | 2016-06-01 | 中冶南方工程技术有限公司 | One utilizes industrial exhaust heat to carry out hydrochloride waste spray roasting system and control method |
| CN204460148U (en) * | 2014-12-10 | 2015-07-08 | 中江能源回收(上海)有限公司 | A kind of residual neat recovering system of Waste Sulfuric Acid Pintsch process regeneration |
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| EP3747530A1 (en) * | 2019-06-06 | 2020-12-09 | CMI UVK GmbH | System for cleaning an off-gas, comprising an acid component, and/or for regenerating an acid component comprised in an off-gas, method |
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