CN105862053A - Regeneration method and system for hydrochloric acid waste liquid - Google Patents

Regeneration method and system for hydrochloric acid waste liquid Download PDF

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Publication number
CN105862053A
CN105862053A CN201610208933.9A CN201610208933A CN105862053A CN 105862053 A CN105862053 A CN 105862053A CN 201610208933 A CN201610208933 A CN 201610208933A CN 105862053 A CN105862053 A CN 105862053A
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China
Prior art keywords
heat exchange
flue gas
hydrochloride waste
washing mechanism
hydrochloric acid
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CN201610208933.9A
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Chinese (zh)
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CN105862053B (en
Inventor
郭金仓
赵海
常勤学
秦健
吴宗应
王军
高俊峰
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Wisdri Engineering and Research Incorporation Ltd
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Wisdri Engineering and Research Incorporation Ltd
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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36Regeneration of waste pickling liquors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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
    • B01D53/1456Removing acid components
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating

Abstract

The invention relates to a regeneration method for hydrochloric acid waste liquid. According to the method, a spray roasting process is adopted, and at least part of the hydrochloric acid waste liquid entering a Venturi preconcentrator is preheated hydrochloric acid waste liquid. The invention further relates to a regeneration system for the hydrochloric acid waste liquid. The regeneration system for the hydrochloric acid waste liquid comprises a roasting furnace, the Venturi preconcentrator, an absorption tower and at least one stage of washing mechanism which are sequentially connected through flue gas pipelines. At least one of the flue gas pipelines is provided with a heat exchange mechanism. The hydrochloric acid waste liquid enters the heat exchange mechanisms to serve as a refrigerant for heat exchange with flue gas, and refrigerant outlets of the heat exchange mechanisms are all connected with the Venturi preconcentrator. By preheating the hydrochloric acid waste liquid, the heat needed for heating concentration of the hydrochloric acid waste liquid in the Venturi preconcentrator is reduced, and thus more hydrochloric acid waste liquid can be heated by the same quantity of roasting flue gas in the Venturi preconcentrator, the processing efficiency of the Venturi preconcentrator is effectively improved, and meanwhile the energy consumption of the roasting furnace can be reduced.

Description

Hydrochloric acid exhausted liquid reclaiming process and system
Technical field
The present invention relates to a kind of hydrochloric acid exhausted liquid reclaiming process and regenerative system.
Background technology
The hydrochloric acid pickling waste liquor that iron and steel or chemical enterprise produce, the most general regeneration using spray roasting to carry out hydrochloride waste Process.The problem that the method exists has:
(1) hydrochloride waste carries out heating concentration in entering Venturi preconcentrator, just sprays in roaster after reaching finite concentration Carrying out chemical reaction, this process needs to provide substantial amounts of heat to realize;This partial heat is mainly provided by roaster system, Substantial amounts of fuel need to be expended can realize, not meet energy-saving and cost-reducing requirement.
(2) the mixed flue gas temperature discharged from roaster, Venturi preconcentrator still up to 95~100 DEG C, through absorbing After the cooling of the routine such as tower, washing facility, dust removal process, the flue-gas temperature still up to 80~85 DEG C discharged from chimney, in routine Ambient temperature conditions under, the tail gas of discharge steam gaseous mixture the whitest, vaporific, sensory effects is poor, and autumn and winter season is more Very.If above-mentioned hydrochloride waste regeneration unit distance residential block is relatively near, tail gas usually can be also for " white cigarette billows " discharged from chimney Become the object that hydrochloride waste regeneration unit nearby residents district resident complains, bring bigger pressure can to iron and steel or chemical enterprise.
Summary of the invention
The embodiment of the present invention provides a kind of hydrochloric acid exhausted liquid reclaiming process and regenerative system, at least can solve the segmental defect of prior art.
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, described method is: hydrochloride waste is in Venturi preconcentrator Spraying into after heated concentration in roaster, the baking flue gas of generation carries out follow-up regeneration of hydrochloric acid and processes and purified treatment;Enter literary composition In mound in the hydrochloride waste of preconcentrator, the most preheated hydrochloride waste.
As one of embodiment, carry out described baking flue gas, in subsequent processes, described baking flue gas being carried out subsequent treatment During, utilize a part at least within for the described baking flue gas hydrochloride waste with Venturi preconcentrator to be entered to carry out heat exchange.
As one of embodiment, described subsequent treatment include described baking flue gas sequentially pass through Venturi preconcentrator, absorption tower and At least one-level washing mechanism processes, and wherein, in Venturi preconcentrator, baking flue gas contacts realization concentration with hydrochloride waste Heat exchange, in absorption tower, the HCl in further cooled flue gas recovered flue gas, is entered flue gas by each described washing mechanism One step cooling dedusting.
As one of embodiment, to less than being connected on the flue of first order washing mechanism exhanst gas outlet be provided with the first heat exchange Mechanism;Enter in the hydrochloride waste of Venturi preconcentrator, at least partially through each described first heat exchange mechanisms and flue gas heat exchange First preheating hydrochloride waste.
As one of embodiment, flue gas produces during heat exchange in the first heat exchange mechanisms and includes the cooling mixed liquid condensing water, this portion Divide cooling mixed liquid to enter first order washing mechanism as cleaning mixture and/or to enter in rinsing water pot as the spray liquid in absorption tower.
As one of embodiment, described washing mechanism is multistage;In each washing mechanism after first order washing mechanism, to being less than Wherein it is provided with the 3rd heat exchange mechanisms on the circulation fluid pipeline of a washing mechanism;Enter in the hydrochloride waste of Venturi preconcentrator, Also having part is the 3rd preheating hydrochloride waste through the 3rd heat exchange mechanisms with corresponding circulation fluid heat exchange.
The present embodiments relate to a kind of hydrochloride waste regenerative system, including the roaster being sequentially connected with by flue, Wen Qiu In preconcentrator, absorption tower and at least one-level washing mechanism, be provided with the first heat exchange mechanisms to less than on wherein one section of flue, By extraction hydrochloride waste each described first heat exchange mechanisms of entrance in hydrochloride waste storage tank as coolant and flue gas heat exchange, each described first The refrigerant exit of heat exchange mechanisms is all connected with described Venturi preconcentrator.
As one of embodiment, to less than being connected on the flue of first order washing mechanism exhanst gas outlet be provided with described first Heat exchange mechanisms.
As one of embodiment, each described first heat exchange mechanisms is respectively provided with cooling mixed liquid outlet, and each described cooling mixed liquid exports All it is connected with described first order washing mechanism and/or rinsing water pot.
As one of embodiment, described system includes multistage washing mechanism;Each described washing after described first order washing mechanism In mechanism, to the circulation fluid pipeline less than wherein washing mechanism described in, it is provided with the 3rd heat exchange mechanisms, by hydrochloride waste storage tank Interior extraction hydrochloride waste described 3rd heat exchange mechanisms of entrance is as coolant and circulation fluid heat exchange, and the coolant of described 3rd heat exchange mechanisms goes out Mouth is connected with described Venturi preconcentrator.
The embodiment of the present invention at least achieves following beneficial effect: by being preheated by hydrochloride waste, it is possible to decrease hydrochloride waste exists Heat needed for heating concentrates in Venturi preconcentrator, i.e. reduce hydrochloride waste in Venturi preconcentrator with baking flue gas Heat exchange amount, thus in Venturi preconcentrator, same amount of baking flue gas can heat more hydrochloride waste, is effectively improved literary composition mound In the treatment effeciency of preconcentrator, i.e. improve the efficiency of hydrochloride waste Regeneration Treatment, roaster energy expenditure can be reduced simultaneously.Base In above-mentioned beneficial effect, the lectotype selection that can make roaster, Venturi preconcentrator, each washing facility etc. is less, energy consumption is lower, Thus save equipment construction cost and improvement cost, reduce construction investment.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or prior art In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only the one of the present invention A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these Accompanying drawing obtains other accompanying drawing.
The structural representation of the Fig. 1 hydrochloride waste regenerative system for providing in embodiment 11;
The structural representation of the Fig. 2 hydrochloride waste regenerative system for providing in embodiment 12;
The structural representation of the Fig. 3 hydrochloride waste regenerative system for providing in embodiment 13.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched State, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the present invention In embodiment, all other embodiments that those of ordinary skill in the art are obtained on the premise of not making creative work, Broadly fall into the scope of protection of the invention.
Embodiment one
The present embodiment relates to the regeneration treating method of a kind of hydrochloride waste, comprises the steps:
(1) after hydrochloride waste is directly entered Venturi preconcentrator 3 heating concentration, through Venturi preconcentrator recycle liquid pump 9 He Spraying into roaster 1 with vaporific drop after roaster charging pump 10 pressurization, drop after chemical reaction, generates in roaster 1 Containing HCl, H2O、O2、CO2、N2With a small amount of Fe2O3The high-temperature flue gas (390~410 DEG C) of powder.
(2) carrying out heat exchange with hydrochloride waste in above-mentioned high-temperature flue gas enters Venturi preconcentrator 3, flue gas is lowered the temperature, dedusting, Hydrochloride waste is then heated, and the temperature of flue gas is reduced to 95~100 DEG C.
(3) from Venturi preconcentrator 3 flue gas out from entrance absorption tower, bottom 4, absorption tower 4 sprays into washings from top, High-temperature flue gas and the washings reverse convection of spray, carry out substantial amounts of heat exchange, the drift that the HCl in flue gas is sprayed in packing area Wash water absorbs, and flue-gas temperature reduces to 85~90 DEG C.
(4) flue gas discharged by absorption tower 4 enter the washing facility such as Venturi scrubber 5, scrubbing tower 6 carry out lowering the temperature, dedusting, Flue-gas temperature is down to 82~87 DEG C, enters air from chimney.
In said method, in step (4), washing facility quantity can be arranged according to actual condition, but existing problems are as follows: arranges Negligible amounts, the exhaust temperature of discharge and dustiness etc. are the highest, easily cause environmental pollution;Arrange quantity more time, energy consumption is relatively High.Usually, two-stage washing facility is set;In the present embodiment, Venturi scrubber 5 and scrubbing tower 6 is used to be sequentially connected with shape Become two-stage washing.
Above-mentioned regeneration treating method is spray roasting hydrochloride waste regeneration and treatment technique commonly used in the prior art, there is energy consumption relatively Height, the exhaust temperature of smoke stack emission is higher, is easily formed problems such as " white cigarettes ".
Corresponding to said method, the present embodiment also provides for a kind of hydrochloride waste regenerative system commonly used in the prior art, this system bag Include roaster 1, dedusting mechanism 2, Venturi preconcentrator 3, absorption tower 4 and at least one-level being sequentially connected with by flue Washing mechanism.The cinder-discharging port of dedusting mechanism 2 is connected with in the middle part of roaster 1 or bottom by ash-unloading tube road.Venturi preconcentrator 3 tops are provided with hydrochloride waste inlet, and bottom is provided with concentrating hydrochloric acid waste liquid outlet, and concentrating hydrochloric acid waste liquid outlet passes through feed Pipeline is connected with roaster 1 inlet, and supply lines is provided with Venturi preconcentrator recycle liquid pump 9 and roaster charging pump 10. Each washing mechanism is equipped with circulation fluid pipeline, it is achieved recycling of spray liquid;The circulation fluid pipeline of first order washing mechanism 5 is also A branch is had to be connected with the spraying mechanism on absorption tower 4, to supply washings to absorption tower 4.The flue gas of afterbody washing mechanism Outlet connection has liquid drop separator 7 and chimney 8, arranges outside the flue gas that will process.
In said system, the multistage washing mechanism of general employing, to improve the cooling dust removing effects to flue gas.In the present embodiment, adopt The two-stage washing mechanism being sequentially connected with Venturi scrubber 5 and scrubbing tower 6.Above-mentioned dedusting mechanism 2 preferably uses cyclone Cleaner unit 2.
Embodiment two
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.The method with The regeneration treating method step of the hydrochloride waste in above-described embodiment one is essentially identical, and here is omitted for concrete steps;This method Improved on the basis of method in embodiment one, particularly as follows: hydrochloride waste is heated in Venturi preconcentrator 3 Spraying in roaster 1 after concentration, the baking flue gas of generation carries out follow-up regeneration of hydrochloric acid and processes and purified treatment;Enter venturi In the hydrochloride waste of preconcentrator 3, the most preheated hydrochloride waste.
By hydrochloride waste is preheated, it is possible to decrease hydrochloride waste heats the heat needed for concentrating in Venturi preconcentrator 3, I.e. reduce hydrochloride waste Venturi preconcentrator 3 in and the heat exchange amount of baking flue gas, thus in Venturi preconcentrator 3 internal phase Commensurability baking flue gas can heat more hydrochloride waste, can improve the treatment effeciency of Venturi preconcentrator 3 first, i.e. improve The efficiency of hydrochloride waste Regeneration Treatment, second can reduce roaster 1 energy expenditure.
Preferably, the preheating method of above-mentioned hydrochloride waste is: carry out baking flue gas, in subsequent processes, utilizing baking flue gas Heat exchange is carried out, to reach this part hydrochloric acid is given up with a part at least within for the hydrochloride waste of Venturi preconcentrator 3 to be entered Liquid carries out the purpose preheated.Above-mentioned subsequent treatment includes that described baking flue gas sequentially passes through Venturi preconcentrator 3, absorption tower 4 And at least one-level washing mechanism processes, wherein, in Venturi preconcentrator 3, baking flue gas contacts realization with hydrochloride waste Concentrating heat exchange, in heat transfer process, baking flue gas forms certain cooling dedusting effect, and hydrochloride waste is then heated, on absorption tower 4 In the further HCl in cooled flue gas recovered flue gas, flue gas lowered the temperature further dedusting by each described washing mechanism.
Subsequent treatment process based on above-mentioned baking flue gas, the exhanst gas outlet of the most any one available subsequent processing device connects In flue, hydrochloride waste is preheated by the flue gas of circulation, the highest the closer to roaster 1 flue-gas temperature, then pre-heat effect is more Good;But consider corrosivity and the needs of absorption tower 4 reclaiming hydrochloric acid of HCl heat exchanging equipment in flue gas, do not use Between Venturi preconcentrator 3 and absorption tower 4, the flue gas of circulation and hydrochloride waste carry out heat exchange.It is preferably at least in being connected to It is provided with the first heat exchange mechanisms 13 on the flue of first order washing mechanism 5 exhanst gas outlet, enters Venturi preconcentrator 3 In hydrochloride waste, at least partially through the first preheating hydrochloride waste of each first heat exchange mechanisms 13 with flue gas heat exchange.If washing mechanism Have multistage, it is contemplated that on the flue being connected to washing mechanism exhanst gas outlet at different levels, be respectively provided with above-mentioned first heat exchange mechanisms 13, But increasing with progression, the temperature of flue gas is gradually lowered, and flue gas is the poorest to the pre-heat effect of hydrochloride waste;Also contemplate for absorbing Above-mentioned first heat exchange mechanisms 13 is set on the flue between tower 4 and first order washing mechanism 5.In the present embodiment, use by Venturi scrubber 5 and scrubbing tower 6 are sequentially connected with two grades of washing mechanisms of composition, Venturi scrubber 5 and scrubbing tower 6 it Between flue on above-mentioned first heat exchange mechanisms 13 is set.
Above-mentioned each first heat exchange mechanisms 13 is entered as coolant and flue gas heat exchange, it is achieved right by hydrochloride waste storage tank extraction hydrochloride waste The purpose of hydrochloride waste preheating.Both (venturi to be entered is pre-dense to the hydrochloride waste of cold conditions to have reclaimed the part of waste heat of baking flue gas Room temperature hydrochloride waste in contracting device 3) preheat, make full use of the heat of baking flue gas, reduce the waste of fume afterheat, joint Can consumption reduction;Baking flue gas is lowered the temperature by the low temperature also utilizing hydrochloride waste, effectively reduces moisture, HCl and the oxygen in flue gas Changing ferrous powder granules content, exhaust gas volumn also greatly reduces, and has more significantly dustproof function, it is possible to decrease the work of subsequent wash mechanism Making pressure, the discharge index that chimney 8 can be made final is far superior to the requirement of national standard, solves chimney 8 exhaust emissions and is easily formed The defect of " white cigarette ".Based on above-mentioned beneficial effect, setting of roaster 1, Venturi preconcentrator 3, each washing facility etc. can be made Alternative type is less, energy consumption is lower, thus saves equipment construction cost and improvement cost, reduces construction investment.
Above-mentioned first heat exchange mechanisms 13 is preferred with employing flue gas heat-exchange unit.Flue gas produces bag in the first heat exchange mechanisms 13 during heat exchange Including the cooling mixed liquid condensing water, this part cooling mixed liquid can enter first order washing mechanism 5 and as cleaning mixture and/or enter As the spray liquid in absorption tower 4 in rinsing water pot.
Embodiment three
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.The method with The regeneration treating method step of the hydrochloride waste in above-described embodiment one is essentially identical, and here is omitted for concrete steps;This method Improved on the basis of method in embodiment one, particularly as follows: reclaim the part of the circulation fluid of first order washing mechanism 5 Waste heat is used for preheating a part at least within for the hydrochloride waste entering Venturi preconcentrator 3, the circulation fluid after heat exchange Spray in this first order washing mechanism 5 and/or absorption tower 4.I.e. on the circulation fluid pipeline of first order washing mechanism 5, arrange second Heat exchange mechanisms 15, is entered above-mentioned second heat exchange mechanisms 15 as coolant and this first order by hydrochloride waste storage tank extraction hydrochloride waste The circulation fluid heat exchange of washing mechanism 5, reaches the purpose to hydrochloride waste preheating, and the hydrochloride waste of this part preheating is the second preheating Hydrochloride waste.Above-mentioned second heat exchange mechanisms 15 is preferred with employing water water-to-water heat exchanger.
Use said method, reclaimed first order washing mechanism 5 circulation fluid part of waste heat to the hydrochloride waste of cold conditions (treat into Enter the room temperature hydrochloride waste in Venturi preconcentrator 3) preheat, make full use of the heat of circulation fluid, reduce more than circulation fluid The waste of heat, energy-saving and cost-reducing, and the efficiency that regeneration of hydrochloric acid reclaims can be improved;Make use of the low temperature of hydrochloride waste to first simultaneously The circulation fluid of level washing mechanism 5 is lowered the temperature, time in the circulation fluid of low temperature sprays into first order washing mechanism 5 or in absorption tower 4, Bigger with the heat exchange amount of flue gas, circulation fluid clean result in first order washing mechanism 5 and the suction in absorption tower 4 can be improved Produce effects moisture, HCl and the brown iron oxide granule content in fruit, effectively reduction flue gas, and exhaust gas volumn also greatly reduces, and can make chimney 8 final discharge indexs are far superior to the requirement of national standard, solve chimney 8 exhaust emissions and are easily formed the defect of " white cigarette ". Based on above-mentioned beneficial effect, the lectotype selection that can make roaster 1, Venturi preconcentrator 3, each washing facility etc. is less, energy consumption Lower, thus save equipment construction cost and improvement cost, reduce construction investment.
Embodiment four
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.The method with The regeneration treating method step of the hydrochloride waste in above-described embodiment one is essentially identical, and here is omitted for concrete steps;This method Improved on the basis of method in embodiment one, particularly as follows: use multistage washing mechanism, first order washing mechanism 5 In each washing mechanism afterwards, to the circulation fluid pipeline less than a wherein washing mechanism, it is provided with the 3rd heat exchange mechanisms 14;Enter In the hydrochloride waste of Venturi preconcentrator 3, at least partially through each 3rd heat exchange mechanisms 14 and the 3rd of corresponding circulation fluid heat exchange Preheating hydrochloride waste.Above-mentioned each 3rd heat exchange mechanisms 14 is preferred with employing water water-to-water heat exchanger.
For washing mechanism quantity more than three grades, can be on the circulation fluid pipeline of the second level and every one-level washing mechanism afterwards Being respectively provided with above-mentioned 3rd heat exchange mechanisms 14, but flue-gas temperature is the lowest the most rearward, flue-gas temperature is corresponding the lowest, washing machine the most at different levels The temperature of the circulation fluid of structure is the lowest, the poorest to the pre-heat effect of hydrochloride waste.In the present embodiment, use by Venturi scrubber 5 are sequentially connected with two grades of washing mechanisms of composition with scrubbing tower 6, arrange the above-mentioned 3rd and change on the circulation fluid pipeline of this scrubbing tower 6 Heat engine structure 14.
Above-mentioned each 3rd heat exchange mechanisms 14 is entered as coolant and flue gas heat exchange, it is achieved right by hydrochloride waste storage tank extraction hydrochloride waste The purpose of hydrochloride waste preheating.Use said method, reclaim the part of the circulation fluid of the second level and washing mechanisms at different levels afterwards The hydrochloride waste (the room temperature hydrochloride waste in Venturi preconcentrator 3 to be entered) of cold conditions is preheated by waste heat, makes full use of The heat of circulation fluid, reduces the waste of circulation fluid waste heat, energy-saving and cost-reducing, and can improve the efficiency that regeneration of hydrochloric acid reclaims;Simultaneously The circulation fluid of corresponding each washing mechanism is lowered the temperature by the low temperature that make use of hydrochloride waste, and the circulation fluid of low temperature sprays into each of correspondence Time in washing mechanism, bigger with the heat exchange amount of flue gas, circulation fluid clean result in each washing mechanism can be improved, improve and respectively wash Washing the dedusting cooling effect of mechanism, exhaust gas volumn also greatly reduces, and the discharge index that chimney 8 can be made final is far superior to national standard Requirement, solve chimney 8 exhaust emissions and be easily formed the defect of " white cigarette ".Based on above-mentioned beneficial effect, can make roaster 1, The lectotype selection of Venturi preconcentrator 3, each washing facility etc. is less, energy consumption is lower, thus saves equipment construction cost and change Cause this, reduce construction investment.
Embodiment five
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.This method is tied Close the technical scheme of the hydrochloric acid exhausted liquid reclaiming process in embodiment two and the hydrochloric acid exhausted liquid reclaiming process in embodiment three, it may be assumed that to roasting Burn flue gas and carry out in subsequent processes, utilize wherein the one of the baking flue gas hydrochloride waste with Venturi preconcentrator 3 to be entered Part carries out heat exchange, it is thus achieved that the first preheating hydrochloride waste;Reclaim the part of waste heat of circulation fluid of first order washing mechanism 5 for right The a portion of the hydrochloride waste entering Venturi preconcentrator 3 preheats, it is thus achieved that the second preheating hydrochloride waste, after heat exchange Circulation fluid spray in this first order washing mechanism 5 and/or absorption tower 4.
Above-mentioned baking flue gas is identical with the mode in embodiment two with the detailed description of the invention of hydrochloride waste heat exchange, and the above-mentioned first order is washed The circulation fluid washing mechanism 5 is identical with the mode in embodiment three with the detailed description of the invention of hydrochloride waste heat exchange, and here is omitted.
As it is shown in figure 1, this method uses is sequentially connected with, by Venturi scrubber 5 and scrubbing tower 6, the two grades of washing mechanisms constituted, First heat exchange mechanisms 13 is set on the flue between Venturi scrubber 5 and scrubbing tower 6, at Venturi scrubber 5 Second heat exchange mechanisms 15 is set on circulation fluid pipeline;Specifically comprising the following steps that of this method
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction part hydrochloride waste, this part hydrochloride waste and cigarette Gas heat exchange obtains the first preheating hydrochloride waste;Entered in the second heat exchange mechanisms 15 by hydrochloride waste storage tank extraction part hydrochloride waste, This part hydrochloride waste obtains the second preheating hydrochloride waste with the circulation fluid heat exchange of Venturi scrubber 5.
Above-mentioned first preheating hydrochloride waste and the second preheating hydrochloride waste enter in Venturi preconcentrator 3, at venturi pre-concentration With the high temperature mixed flue gas counter current contact discharged by roaster 1 in device 3, hydrochloride waste absorbs the HCl in flue gas and is added by flue gas Heat, the portion of water in hydrochloride waste is evaporated, thus realizes heating and concentrate.
(2) hydrochloride waste after concentrating is injected into roaster 1 through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10 In, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as Fe by chemical reaction2O3 Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto and discharges bottom roaster 1, and high temperature mixed flue gas contains HCl, H2O、O2、 CO2、N2And Fe2O3Powder etc., the temperature of high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after double-cyclone dust collector 2 processes, the Fe of about 50% in flue gas2O3Powder passes through feed back Pipe returns to the bottom of roaster 1 and discharges.Subsequently high-temperature flue gas enter in Venturi preconcentrator 3 carry out lowering the temperature, dedusting, high temperature The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) entering into absorption tower 4 from Venturi preconcentrator 3 high-temperature flue gas out, top, absorption tower 4 sprays into a part of warp Washings after Venturi scrubber recycle liquid pump 11 pressurization, flue gas and washings reverse convection in absorption tower 4 of spray, Packing area carries out heat exchange and absorbs reaction, and the washings that in flue gas, the HCl of about 99% is sprayed absorb, and forms regenerated acid and discharges, Flue-gas temperature is then reduced to 85~90 DEG C.
(5) from absorption tower 4, flue gas out enters Venturi scrubber 5, by extracting hydrochloride waste conduct in hydrochloride waste storage tank Coolant is passed through in the second heat exchange mechanisms 15 and cools down Venturi scrubber circulation fluid, and the circulation fluid after cooling is through Venturi scrubbing Device recycle liquid pump 11 pressurization after spray into Venturi scrubber 5 top the flue gas entered from bottom is lowered the temperature, dedusting.Wherein, In the second heat exchange mechanisms 15, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, and circulation fluid temperature is by 70~75 DEG C of falls As little as 38~42 DEG C.Through 38~42 DEG C Venturi scrubber circulation fluid spray after, Venturi scrubber 5 exiting flue gas temperature Degree is reduced to 70~75 DEG C by 85~90 DEG C;
(6) flue gas enters the first heat exchange mechanisms 13 the most afterwards from Venturi scrubber 5, is given up by the hydrochloric acid in hydrochloride waste storage tank Liquid is passed through in the first heat exchange mechanisms 13 as coolant and cools down flue gas.Flue gas is entered by the top of the first heat exchange mechanisms 13, It is discharged into waste gas conveying fan and scrubbing tower 6 by bottom;Hydrochloride waste enters from the bottom of the first heat exchange mechanisms 13, from top Flow out;The condensation water that flue gas cooling produces then enters Venturi scrubber 5 (or rinsing water pot) from the bottom of the first heat exchange mechanisms 13 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 45~50 DEG C by 70~75 DEG C, During this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Granule and HCl remnants also reduce about 50%, cigarette Tolerance also reduces about 30~40%.
(7) cooling after flue gas enter scrubbing tower 6, in scrubbing tower 6 further cooling, dedusting, scrubbing tower 6 exiting flue gas Temperature is reduced to 40~45 DEG C, is discharged by chimney 8 after liquid drop separator 7 processes, without " white cigarette " phenomenon.
Embodiment six
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.This method is tied Close the technical scheme of the hydrochloric acid exhausted liquid reclaiming process in embodiment two and the hydrochloric acid exhausted liquid reclaiming process in embodiment four, it may be assumed that to roasting Burn flue gas and carry out in subsequent processes, utilize wherein the one of the baking flue gas hydrochloride waste with Venturi preconcentrator 3 to be entered Part carries out heat exchange, it is thus achieved that the first preheating hydrochloride waste;Use multistage washing mechanism, respectively washing after first order washing mechanism 5 Wash in mechanism, to the circulation fluid pipeline less than a wherein washing mechanism, be provided with the 3rd heat exchange mechanisms 14, enter venturi pre-dense In the hydrochloride waste of contracting device 3, at least partially give up with the 3rd preheating hydrochloric acid of corresponding circulation fluid heat exchange through each 3rd heat exchange mechanisms 14 Liquid.
Above-mentioned baking flue gas is identical with the mode in embodiment two with the detailed description of the invention of hydrochloride waste heat exchange, the above-mentioned second level and The circulation fluid of washing mechanisms at different levels afterwards is identical with the mode in embodiment four with the detailed description of the invention of hydrochloride waste heat exchange, this Place repeats no more.
As in figure 2 it is shown, this method uses is sequentially connected with, by Venturi scrubber 5 and scrubbing tower 6, the two grades of washing mechanisms constituted, First heat exchange mechanisms 13 is set on the flue between Venturi scrubber 5 and scrubbing tower 6, at the circulation fluid of scrubbing tower 6 3rd heat exchange mechanisms 14 is set on pipeline;Specifically comprising the following steps that of this method
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction part hydrochloride waste, this part hydrochloride waste and cigarette Gas heat exchange obtains the first preheating hydrochloride waste;Entered in the 3rd heat exchange mechanisms 14 by hydrochloride waste storage tank extraction part hydrochloride waste, This part hydrochloride waste obtains the 3rd preheating hydrochloride waste with the circulation fluid heat exchange of scrubbing tower 6.
Above-mentioned first preheating hydrochloride waste and the 3rd preheating hydrochloride waste enter in Venturi preconcentrator 3, at venturi pre-concentration With the high temperature mixed flue gas counter current contact discharged by roaster 1 in device 3, hydrochloride waste absorbs the HCl in flue gas and is added by flue gas Heat, the portion of water in hydrochloride waste is evaporated, thus realizes heating and concentrate.
(2) hydrochloride waste after concentrating is injected into roaster 1 through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10 In, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as Fe by chemical reaction2O3 Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto and discharges bottom roaster 1, and high temperature mixed flue gas contains HCl, H2O、O2、 CO2、N2And Fe2O3Powder etc., the temperature of high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after double-cyclone dust collector 2 processes, the Fe of about 50% in flue gas2O3Powder passes through feed back Pipe returns to the bottom of roaster 1 and discharges.Subsequently high-temperature flue gas enter in Venturi preconcentrator 3 carry out lowering the temperature, dedusting, high temperature The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) entering into absorption tower 4 from Venturi preconcentrator 3 high-temperature flue gas out, top, absorption tower 4 sprays into a part of warp Washings after Venturi scrubber recycle liquid pump 11 pressurization, flue gas and washings reverse convection in absorption tower 4 of spray, Packing area carries out heat exchange and absorbs reaction, and the washings that in flue gas, the HCl of about 99% is sprayed absorb, and forms regenerated acid and discharges, Flue-gas temperature is then reduced to 85~90 DEG C.
(5) from absorption tower 4, flue gas out enters Venturi scrubber 5, pressurizes through Venturi scrubber recycle liquid pump 11 After circulation fluid spray into from the time mouth of Venturi scrubber 5, flue gas and circulation fluid carry out heat exchange, lowered the temperature further, Dedusting, flue-gas temperature is reduced to 82~87 DEG C;
(6) flue gas enters the first heat exchange mechanisms 13 the most afterwards from Venturi scrubber 5, is given up by the hydrochloric acid in hydrochloride waste storage tank Liquid is passed through in the first heat exchange mechanisms 13 as coolant and cools down flue gas.Flue gas is entered by the top of the first heat exchange mechanisms 13, It is discharged into waste gas conveying fan (illustrating, do not mark) and scrubbing tower 6 by bottom;Hydrochloride waste is from the first heat exchange mechanisms 13 Bottom enter, from top flow out;The condensation water that flue gas cooling produces then enters venturi from the bottom of the first heat exchange mechanisms 13 and washes Wash in device 5 (or rinsing water pot).Through heat exchange, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, and flue-gas temperature is by 82~87 DEG C Being reduced to 63~68 DEG C, during this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Granule and HCl are remaining Also reducing about 50%, exhaust gas volumn also reduces about 30~40%.
(7) flue gas after cooling enters scrubbing tower 6, extraction hydrochloride waste in hydrochloride waste storage tank be passed through the 3rd as coolant and change Scrubbing tower circulation fluid is cooled down by heat engine structure 14, sprays into after circulation fluid scrubbed tower recycle liquid pump 12 pressurization after cooling and wash Wash tower 6 top the flue gas entered from bottom is lowered the temperature, dedusting.Wherein, in the 3rd heat exchange mechanisms 14, hydrochloride waste temperature Degree 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, through 38~42 DEG C wash After washing tower circulation fluid spray, scrubbing tower 6 exit gas temperature is reduced to 40~42 DEG C by 63~68 DEG C, through liquid drop separator 7 Discharged by chimney 8 after process, without " white cigarette " phenomenon.
Embodiment seven
The present embodiments relate to a kind of hydrochloric acid exhausted liquid reclaiming process, at least can solve the subproblem of prior art.This method is tied The technical scheme of the hydrochloric acid exhausted liquid reclaiming process in conjunction embodiment two, embodiment three and embodiment four, it may be assumed that baking flue gas is carried out In subsequent processes, baking flue gas is utilized to change with a portion of the hydrochloride waste of Venturi preconcentrator 3 to be entered Heat, it is thus achieved that the first preheating hydrochloride waste;Use multistage washing mechanism, more than the part of the circulation fluid reclaiming first order washing mechanism 5 Heat is for preheating a portion of the hydrochloride waste entering Venturi preconcentrator 3, it is thus achieved that the second preheating hydrochloride waste, Circulation fluid after heat exchange sprays in this first order washing mechanism 5 and/or absorption tower 4;Each washing after first order washing mechanism 5 In mechanism, to the circulation fluid pipeline less than a wherein washing mechanism, it is provided with the 3rd heat exchange mechanisms 14, enters venturi pre-concentration In the hydrochloride waste of device 3, at least partially through the 3rd preheating hydrochloride waste of each 3rd heat exchange mechanisms 14 with corresponding circulation fluid heat exchange.
Above-mentioned baking flue gas is identical with the mode in embodiment two with the detailed description of the invention of hydrochloride waste heat exchange, and the above-mentioned first order is washed The circulation fluid washing mechanism 5 is identical with the mode in embodiment three with the detailed description of the invention of hydrochloride waste heat exchange, the above-mentioned second level and The circulation fluid of washing mechanisms at different levels afterwards is identical with the mode in embodiment four with the detailed description of the invention of hydrochloride waste heat exchange, this Place repeats no more.
As it is shown on figure 3, this method uses is sequentially connected with, by Venturi scrubber 5 and scrubbing tower 6, the two grades of washing mechanisms constituted, First heat exchange mechanisms 13 is set on the flue between Venturi scrubber 5 and scrubbing tower 6, at Venturi scrubber 5 Second heat exchange mechanisms 15 is set on circulation fluid pipeline, the circulation fluid pipeline of scrubbing tower 6 arranges the 3rd heat exchange mechanisms 14;We Specifically comprising the following steps that of method
(1) entered in the first heat exchange mechanisms 13 by hydrochloride waste storage tank extraction part hydrochloride waste, this part hydrochloride waste and cigarette Gas heat exchange obtains the first preheating hydrochloride waste;Entered in the second heat exchange mechanisms 15 by hydrochloride waste storage tank extraction part hydrochloride waste, This part hydrochloride waste obtains the second preheating hydrochloride waste with the circulation fluid heat exchange of Venturi scrubber 5;Taken out by hydrochloride waste storage tank Taking part hydrochloride waste and enter in the 3rd heat exchange mechanisms 14, this part hydrochloride waste obtains the 3rd with the circulation fluid heat exchange of scrubbing tower 6 Preheating hydrochloride waste.
Above-mentioned first preheating hydrochloride waste, the second preheating hydrochloride waste and the 3rd preheating hydrochloride waste enter Venturi preconcentrator 3 In, with the high temperature mixed flue gas counter current contact discharged by roaster 1 in Venturi preconcentrator 3, hydrochloride waste absorbs flue gas In HCl and by flue gas, the portion of water in hydrochloride waste is evaporated, thus realize heating concentrate.
(2) hydrochloride waste after concentrating is injected into roaster 1 through Venturi preconcentrator recycle liquid pump 9, roaster charging pump 10 In, the heat provided by combustion gas and combustion fan, the FeCl in hydrochloride waste2、FeCl3It is generated as Fe by chemical reaction2O3 Powder and high temperature mixed flue gas, Fe2O3Powder drops down onto and discharges bottom roaster 1, and high temperature mixed flue gas contains HCl, H2O、O2、 CO2、N2And Fe2O3Powder etc., the temperature of high temperature mixed flue gas is 390~410 DEG C.
(3) above-mentioned high temperature mixed flue gas is after double-cyclone dust collector 2 processes, the Fe of about 50% in flue gas2O3Powder passes through feed back Pipe returns to the bottom of roaster 1 and discharges.Subsequently high-temperature flue gas enter in Venturi preconcentrator 3 carry out lowering the temperature, dedusting, high temperature The temperature of flue gas is reduced to 95~100 DEG C by 390~410 DEG C.
(4) entering into absorption tower 4 from Venturi preconcentrator 3 high-temperature flue gas out, top, absorption tower 4 sprays into a part of warp Washings after Venturi scrubber recycle liquid pump 11 pressurization, flue gas and washings reverse convection in absorption tower 4 of spray, Packing area carries out heat exchange and absorbs reaction, and the washings that in flue gas, the HCl of about 99% is sprayed absorb, and forms regenerated acid and discharges, Flue-gas temperature is then reduced to 85~90 DEG C.
(5) from absorption tower 4, flue gas out enters Venturi scrubber 5, by extracting hydrochloride waste conduct in hydrochloride waste storage tank Coolant is passed through in the second heat exchange mechanisms 15 and cools down Venturi scrubber circulation fluid, and the circulation fluid after cooling is through Venturi scrubbing Device recycle liquid pump 11 pressurization after spray into Venturi scrubber 5 top the flue gas entered from bottom is lowered the temperature, dedusting.Wherein, In the second heat exchange mechanisms 15, hydrochloride waste temperature is increased to 36~40 DEG C by 25~35 DEG C, and circulation fluid temperature is by 70~75 DEG C of falls As little as 38~42 DEG C.Through 38~42 DEG C Venturi scrubber circulation fluid spray after, Venturi scrubber 5 exiting flue gas temperature Degree is reduced to 70~75 DEG C by 85~90 DEG C;
(6) flue gas enters the first heat exchange mechanisms 13 the most afterwards from Venturi scrubber 5, is given up by the hydrochloric acid in hydrochloride waste storage tank Liquid is passed through in the first heat exchange mechanisms 13 as coolant and cools down flue gas.Flue gas is entered by the top of the first heat exchange mechanisms 13, It is discharged into waste gas conveying fan and scrubbing tower 6 by bottom;Hydrochloride waste enters from the bottom of the first heat exchange mechanisms 13, from top Flow out;The condensation water that flue gas cooling produces then enters Venturi scrubber 5 (or rinsing water pot) from the bottom of the first heat exchange mechanisms 13 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 45~50 DEG C by 70~75 DEG C, During this, the moisture in flue gas reduces 50~70%, the Fe that flue gas carries2O3Granule and HCl remnants also reduce about 50%, cigarette Tolerance also reduces about 30~40%.
(7) flue gas after cooling enters scrubbing tower 6, extraction hydrochloride waste in hydrochloride waste storage tank be passed through the 3rd as coolant and change Scrubbing tower circulation fluid is cooled down by heat engine structure 14, sprays into after circulation fluid scrubbed tower recycle liquid pump 12 pressurization after cooling and wash Wash tower 6 top the flue gas entered from bottom is lowered the temperature, dedusting.Wherein, in the 3rd heat exchange mechanisms 14, hydrochloride waste temperature Degree 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, through 38~42 DEG C wash After washing tower circulation fluid spray, scrubbing tower 6 exit gas temperature reduces by 40~42 DEG C, by chimney 8 after liquid drop separator 7 processes Discharge, without " white cigarette " phenomenon.
Embodiment eight
The present embodiment relates to a kind of hydrochloride waste regenerative system, the hydrochloride waste regenerative system knot that native system provides in embodiment one On the basis of structure, it is provided with the first heat exchange mechanisms 13 to less than on wherein one section of flue, by extracting salt in hydrochloride waste storage tank Acid waste liquid each first heat exchange mechanisms 13 of entrance is as coolant and flue gas heat exchange, and the refrigerant exit of each first heat exchange mechanisms 13 is all with civilian In mound, the hydrochloride waste inlet of preconcentrator 3 connects.
Can flue, Venturi preconcentrator 3 and absorption tower between double-cyclone dust collector 2 and Venturi preconcentrator 3 Between the flue between flue, absorption tower 4 and first order washing mechanism 5 between 4, adjacent two washing mechanisms Arrange on one of them or multiple flue in flue between flue, afterbody washing mechanism and chimney 8 Above-mentioned first heat exchange mechanisms 13, the highest the closer to roaster 1 flue-gas temperature, then the best to the pre-heat effect of hydrochloride waste.But examine Consider to the corrosivity of HCl heat exchanging equipment in flue gas and the needs of absorption tower 4 reclaiming hydrochloric acid, the most do not use at venturi Between preconcentrator 3 and absorption tower 4, the flue gas of circulation and hydrochloride waste carry out heat exchange.It is preferably at least and washes in being connected to the first order Wash and on the flue of mechanism 5 exhanst gas outlet, be provided with the first heat exchange mechanisms 13, enter the hydrochloride waste of Venturi preconcentrator 3 In, at least partially through the first preheating hydrochloride waste of each first heat exchange mechanisms 13 with flue gas heat exchange.If washing mechanism has multistage, It is contemplated that be respectively provided with above-mentioned first heat exchange mechanisms 13 on the flue being connected to washing mechanism exhanst gas outlet at different levels, but with progression Increasing, the temperature of flue gas is gradually lowered, and flue gas is the poorest to the pre-heat effect of hydrochloride waste;Also contemplate on absorption tower 4 and Above-mentioned first heat exchange mechanisms 13 is set on the flue between one-level washing mechanism 5.In the present embodiment, use and washed by venturi Wash device 5 and scrubbing tower 6 and be sequentially connected with two grades of washing mechanisms of composition, the flue gas between Venturi scrubber 5 and scrubbing tower 6 Above-mentioned first heat exchange mechanisms 13 is set on pipeline.
Above-mentioned first heat exchange mechanisms 13 is preferred with employing flue gas heat-exchange unit.Flue gas produces bag in the first heat exchange mechanisms 13 during heat exchange Including the cooling mixed liquid condensing water, this part cooling mixed liquid can enter first order washing mechanism 5 and as cleaning mixture and/or enter As the spray liquid in absorption tower 4 in rinsing water pot.
Embodiment nine
The present embodiment relates to a kind of hydrochloride waste regenerative system, the hydrochloride waste regenerative system knot that native system provides in embodiment one On the basis of structure, on the circulation fluid pipeline of first order washing mechanism 5, it is provided with the second heat exchange mechanisms 15, described second heat exchanger The refrigerant inlet of structure 15 is connected with hydrochloride waste storage tank, and refrigerant exit is connected with described Venturi preconcentrator 3;The described second level The circulation fluid tube outlet end of washing mechanism is connected to this first order washing mechanism 5 and/or absorption tower 4.Above-mentioned second heat exchange mechanisms 15 are preferred with employing water water-to-water heat exchanger.
Embodiment ten
The present embodiment relates to a kind of hydrochloride waste regenerative system, the hydrochloride waste regenerative system knot that native system provides in embodiment one On the basis of structure, use multistage washing mechanism, in each washing mechanism after first order washing mechanism 5, to less than wherein one washing Wash and on the circulation fluid pipeline of mechanism, be provided with the 3rd heat exchange mechanisms 14;Enter in the hydrochloride waste of Venturi preconcentrator 3, at least Part is the 3rd preheating hydrochloride waste through each 3rd heat exchange mechanisms 14 with corresponding circulation fluid heat exchange.
In the present embodiment, use the two-stage washing mechanism that Venturi scrubber 5 is sequentially connected with scrubbing tower 6, at scrubbing tower 6 Above-mentioned 3rd heat exchange mechanisms 14 it is provided with on circulation fluid pipeline.
Above-mentioned 3rd heat exchange mechanisms 14 is preferred with employing water water-to-water heat exchanger.
Embodiment 11
Such as Fig. 1, the present embodiment relates to a kind of hydrochloride waste regenerative system, and native system eight is carried in embodiment nine in conjunction with the embodiments The structure of the hydrochloride waste regenerative system of confession, it may be assumed that be provided with the first heat exchange mechanisms 13 to less than on wherein one section of flue, by In hydrochloride waste storage tank, extraction hydrochloride waste enters each first heat exchange mechanisms 13 as coolant and flue gas heat exchange, each first heat exchange mechanisms The refrigerant exit of 13 is all connected with the hydrochloride waste inlet of Venturi preconcentrator 3;Circulation fluid in first order washing mechanism 5 Being provided with the second heat exchange mechanisms 15 on pipeline, the refrigerant inlet of described second heat exchange mechanisms 15 is connected with hydrochloride waste storage tank, cold Matchmaker's outlet is connected with described Venturi preconcentrator 3.
About the first heat exchange mechanisms 13, position, concrete structure etc. and the relative set mode in embodiment eight and structure phase are set With, here is omitted.
Embodiment 12
Such as Fig. 2, the present embodiment relates to a kind of hydrochloride waste regenerative system, and native system eight is carried in embodiment ten in conjunction with the embodiments The structure of the hydrochloride waste regenerative system of confession, it may be assumed that be provided with the first heat exchange mechanisms 13 to less than on wherein one section of flue, by In hydrochloride waste storage tank, extraction hydrochloride waste enters each first heat exchange mechanisms 13 as coolant and flue gas heat exchange, each first heat exchange mechanisms The refrigerant exit of 13 is all connected with the hydrochloride waste inlet of Venturi preconcentrator 3;Using multistage washing mechanism, the first order is washed Wash in each washing mechanism after mechanism 5, to the circulation fluid pipeline less than a wherein washing mechanism, be provided with the 3rd heat exchange mechanisms 14, the refrigerant inlet of each described 3rd heat exchange mechanisms 14 is all connected with hydrochloride waste storage tank, and refrigerant exit is all pre-with described venturi Concentrator 3 connects.
Arranging in position, concrete structure etc. and embodiment eight and implementing about the first heat exchange mechanisms 13 and the 3rd heat exchange mechanisms 14 Relative set mode and structure in example ten are identical, and here is omitted.
Embodiment 13
Such as Fig. 3, the present embodiment relates to a kind of hydrochloride waste regenerative system, native system eight, embodiment nine and enforcement in conjunction with the embodiments The structure of the hydrochloride waste regenerative system provided in example ten, it may be assumed that be provided with the first heat exchange to less than on wherein one section of flue Mechanism 13, by hydrochloride waste storage tank, extraction hydrochloride waste each first heat exchange mechanisms 13 of entrance is as coolant and flue gas heat exchange, respectively The refrigerant exit of the first heat exchange mechanisms 13 is all connected with the hydrochloride waste inlet of Venturi preconcentrator 3;Use multistage washing machine Structure, is provided with the second heat exchange mechanisms 15 on the circulation fluid pipeline of first order washing mechanism 5, described second heat exchange mechanisms 15 Refrigerant inlet is connected with hydrochloride waste storage tank, and refrigerant exit is connected with described Venturi preconcentrator 3;First order washing mechanism 5 In each washing mechanism afterwards, to the circulation fluid pipeline less than a wherein washing mechanism, it is provided with the 3rd heat exchange mechanisms 14, each institute The refrigerant inlet stating the 3rd heat exchange mechanisms 14 is all connected with hydrochloride waste storage tank, refrigerant exit all with described Venturi preconcentrator 3 Connect.
Arranging in position, concrete structure etc. and embodiment eight and implementing about the first heat exchange mechanisms 13 and the 3rd heat exchange mechanisms 14 Relative set mode and structure in example ten are identical, and here is omitted.
Each hydrochloride waste regenerative system provided in above-described embodiment eight to embodiment 13 is used equally to implement embodiment two to reality Executing each hydrochloric acid exhausted liquid reclaiming process provided in example seven, can obtain corresponding technique effect, here is omitted.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and former Within then, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (10)

1. a hydrochloric acid exhausted liquid reclaiming process, described method is: hydrochloride waste sprays into roasting after heated concentration in Venturi preconcentrator In burning stove, the baking flue gas of generation carries out follow-up regeneration of hydrochloric acid and processes and purified treatment, it is characterised in that enter venturi pre- In the hydrochloride waste of concentrator, the most preheated hydrochloride waste.
Hydrochloric acid exhausted liquid reclaiming process the most according to claim 1, it is characterised in that: described baking flue gas is carried out subsequent treatment mistake Cheng Zhong, utilizes a part at least within for the described baking flue gas hydrochloride waste with Venturi preconcentrator to be entered to carry out heat exchange.
Hydrochloric acid exhausted liquid reclaiming process the most according to claim 2, it is characterised in that: described subsequent treatment includes described baking flue gas Sequentially pass through Venturi preconcentrator, absorption tower and at least one-level washing mechanism to process, wherein, at Venturi preconcentrator Interior baking flue gas contacts realization and concentrates heat exchange with hydrochloride waste, the HCl in further cooled flue gas recovered flue gas in absorption tower, Flue gas lowered the temperature further dedusting by each described washing mechanism.
Hydrochloric acid exhausted liquid reclaiming process the most according to claim 3, it is characterised in that: to less than being connected to first order washing mechanism cigarette It is provided with the first heat exchange mechanisms on the flue of gas outlet;Enter in the hydrochloride waste of Venturi preconcentrator, at least partially The first preheating hydrochloride waste through each described first heat exchange mechanisms with flue gas heat exchange.
Hydrochloric acid exhausted liquid reclaiming process the most according to claim 4, it is characterised in that: flue gas produces during heat exchange in the first heat exchange mechanisms The raw cooling mixed liquid including condensation water, this part cooling mixed liquid enters first order washing mechanism and as cleaning mixture and/or enters As the spray liquid in absorption tower in rinsing water pot.
6. according to the hydrochloric acid exhausted liquid reclaiming process described in claim 3 or 4, it is characterised in that: described washing mechanism is multistage;First In each washing mechanism after level washing mechanism, to the circulation fluid pipeline less than a wherein washing mechanism, it is provided with the 3rd heat exchanger Structure;Entering in the hydrochloride waste of Venturi preconcentrator, also having part is the through the 3rd heat exchange mechanisms and corresponding circulation fluid heat exchange Three preheating hydrochloride wastes.
7. a hydrochloride waste regenerative system, including the roaster being sequentially connected with by flue, Venturi preconcentrator, absorption tower At least one-level washing mechanism, it is characterised in that: it is provided with the first heat exchange mechanisms, by salt to less than on wherein one section of flue In acid waste liquid storage tank, extraction hydrochloride waste each described first heat exchange mechanisms of entrance is as coolant and flue gas heat exchange, each described first heat exchange The refrigerant exit of mechanism is all connected with described Venturi preconcentrator.
Hydrochloride waste regenerative system the most according to claim 7, it is characterised in that: to less than being connected to first order washing mechanism cigarette It is provided with described first heat exchange mechanisms on the flue of gas outlet.
Hydrochloride waste regenerative system the most according to claim 8, it is characterised in that: each described first heat exchange mechanisms is respectively provided with cooling Mixture export, the outlet of each described cooling mixed liquid is all connected with described first order washing mechanism and/or rinsing water pot.
10. according to the hydrochloride waste regenerative system described in claim 7 or 8, it is characterised in that: described system includes multistage washing machine Structure;In each described washing mechanism after described first order washing mechanism, to the circulation fluid pipe less than wherein washing mechanism described in It is provided with the 3rd heat exchange mechanisms on road, is entered described 3rd heat exchange mechanisms as coolant by extracting hydrochloride waste in hydrochloride waste storage tank With circulation fluid heat exchange, the refrigerant exit of described 3rd heat exchange mechanisms is connected with described Venturi preconcentrator.
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CN109205561A (en) * 2018-09-25 2019-01-15 李晓垚 A kind of industrial concentrating hydrochloric acid recovery method

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