CN201906471U - Vacuum concentration device for diluted acid - Google Patents

Vacuum concentration device for diluted acid Download PDF

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Publication number
CN201906471U
CN201906471U CN201120027542XU CN201120027542U CN201906471U CN 201906471 U CN201906471 U CN 201906471U CN 201120027542X U CN201120027542X U CN 201120027542XU CN 201120027542 U CN201120027542 U CN 201120027542U CN 201906471 U CN201906471 U CN 201906471U
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China
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vacuum
heater
inlet
diluted acid
liquid outlet
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CN201120027542XU
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马厚强
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Shandong Feng Te Environmental Protection Technology Co., Ltd
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ZIBO TONGDA ANTI-CORROSION EQUIPMENT CO LTD
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Abstract

The utility model provides a vacuum concentration device for diluted acid, which comprises a vacuum evaporator, a vacuum heater, a condenser and a vacuum pump. The vacuum heater comprises a primary vacuum heater and a secondary vacuum heater, a liquid inlet of the primary vacuum heater is connected with a liquid outlet of the vacuum evaporator, a liquid inlet of the secondary vacuum heater is connected with a liquid outlet of the primary vacuum heater, a liquid outlet of the secondary vacuum heater is connected with a liquid inlet of the vacuum evaporator, a gas outlet of the vacuum evaporator is connected with a gas inlet of the primary vacuum heater, a water outlet is arranged on the lower portion of the primary vacuum heater, a gas outlet of the primary vacuum heater is connected with a gas inlet of the condenser, uncondensed gas is exhausted from a gas outlet of the condenser, and the vacuum pump is connected with the condenser. The vacuum concentration device for diluted acid is capable of utilizing energy sufficiently so that production cost is reduced. The vacuum concentration device for diluted acid realizes cyclic utilization of waste acid and is environment-friendly.

Description

The diluted acid vacuum concentrating apparatus
Technical field
The utility model relates to a kind of spent acid purification retracting device, is specifically related to the diluted acid vacuum concentrating apparatus that a kind of spent acid that water content is high is purified and reclaimed, and belongs to chemical technology field.
Background technology
At chemical industry, pharmacy, field of textiles, the application of acid is very extensive, in process of production, carrying out along with reaction, can produce a large amount of high spent acid of water content, because the concentration of this spent acid is extremely low, so can't directly utilize to it, if but these spent acid are directly discharged, not only wasted a large amount of acid solutions, and acidic materials make water resource or soil acidification easily, ecological environment is worked the mischief, therefore many in recent years countries have all formulated strict standard to the discharging of spent acid, and spent acid to be discharged just can discharge after must reaching discharge standard through strict processing.
At present, the processing method to spent acid mainly contains neutralisation treatment and recycles two kinds.The neutralisation treatment method is simple, but this method need consume a large amount of alkali, it is neutral that acid solution after neutralization is, so it can't be utilized separately, can only discharge, so this processing method does not realize the reasonable processing and utilizing to waste acid liquor, and this method causes secondary pollution because of alkali addition not enough or excessive easily.The recovering waste acid utilization mainly is the impurity that adopts in the reasonable method removal spent acid; purified acid solution; increase the concentration of acid; obtaining can recycling once more acid; this processing method has not only been protected environment; and make that spent acid can be recycling, reduced production cost, so obtained extensive use.
In the prior art, Chinese patent CN101570316A discloses and has refined the device that reclaims hydrochloric acid in a kind of hydrochloric acid pickling waste liquor, this device comprises the spent acid storage tank, filter, cold boiler, heater, condenser, reuse acid storage tank, filter centrifugal and compressor, the port of export of its spent acid holding vessel is connected with the entrance point of filter, the port of export of filter is connected with the sidewall of cold boiler first entrance point, the top exit end of cold boiler is connected with the liquor inlet end of condenser, and the material liquid outlet end of condenser is connected with reuse acid storage tank by the vavuum pump on pipeline and the pipeline; The outlet at bottom end of cold boiler is connected with the liquor inlet end of heater by the circulating pump on pipeline and the pipeline, and the material liquid outlet end of heater is connected with sidewall second entrance point of cold boiler; The refrigerant exit end of condenser is connected with the entrance point of compressor, and the port of export of compressor is connected with the refrigerant entrance point of heater, and the refrigerant exit end of heater is connected with the refrigerant exit end of condenser.
When using said apparatus that hydrochloric acid is refined recovery, at first, spent acid after filtering delivered in the cold boiler evaporate, then, to deliver to the heater from the bottom of cold boiler through the spent acid liquid of pervaporation and heat, once more, the spent acid liquid after the heating is delivered in the cold boiler and evaporated, successively circulation; And the mixed vapour at the top of cold boiler is sent into and is carried out condensation in the condenser, and enters reuse acid storage tank by vavuum pump and store.This patent does not produce discarded object in the acid treatment process, realized the recycling of spent acid.But, this technology will directly be sent into by the high temperature mixed vapour that discharge at described cold boiler top and carry out condensation in the condenser, and the heat in the steam is not fully utilized like this, needs to expend the big energy of condenser on the contrary, waste the energy on the whole, improved production cost.
In addition, when spent acid at first enters in the cold boiler, because the spent acid that industry is discharged all has certain temperature, so when guaranteeing that vacuum in the cold boiler is certain value, can be so that spent acid at this cold boiler inner ebullition, carries out prevapourising; The acid pickle of discharging through cold boiler is in order to carry out evaporation process completely afterwards, need heat it, acid pickle after will heating then imports in the cold boiler once more, and then evaporation, cold boiler still keeps original vacuum in this process, certainly this vacuum can guarantee that fully the acid pickle boiling after heating evaporates, but the acid pickle after the heating evaporates and need not so high vacuum far away, need expend more energy and such condition of high vacuum degree is set.
Only be provided with a cold boiler in this technology, be limited to the disposal ability of cold boiler, influenced the concentration of the acid after reclaiming to a great extent, cause still containing a large amount of water in the acid after reclaiming, can't utilize.
Summary of the invention
First technical problem to be solved in the utility model is in the diluted acid enrichment facility of the prior art steam directly to be discharged, the heat to steam does not make full use of, and then a kind of diluted acid vacuum concentrating apparatus that can make full use of steam heat, low production cost is provided.
Second technical problem to be solved in the utility model is that diluted acid enrichment facility of the prior art can't carry out the adaptability adjusting to the vacuum in the cold boiler according to the temperature of spent acid, still adopt the evaporitic environment of condition of high vacuum degree when causing the spent acid temperature high, wasted the energy, and then a kind of have vacuum multistage evaporator and the cold boiler that can select according to the spent acid temperature, the diluted acid vacuum concentrating apparatus that obtains the recyclable utilization of higher concentration are provided.
For solving the problems of the technologies described above, the utility model provides a kind of diluted acid vacuum concentrating apparatus, comprises cold boiler, vacuum heater, condenser and vavuum pump;
Described cold boiler has at least one evaporation chamber, all is provided with inlet, liquid outlet and gas outlet on each described evaporation chamber, and the liquid outlet of adjacent two evaporation chambers is connected with inlet;
Described vacuum heater is provided with inlet and liquid outlet;
Described vacuum heater comprises the one-level vacuum heater and has the secondary vacuum heater of external heat source that the inlet of described one-level vacuum heater is connected with the liquid outlet of described cold boiler; The inlet of described secondary vacuum heater is connected with the liquid outlet of described one-level vacuum heater, and the liquid outlet of described secondary vacuum heater is connected with the inlet of described cold boiler;
The gas outlet of described cold boiler is connected with the air inlet of described one-level vacuum heater; Described one-level vacuum heater bottom is provided with delivery port;
The gas outlet of described one-level vacuum heater is connected with the air inlet of described condenser, and uncooled gas is through the exhaust of the gas outlet of described condenser;
Described vavuum pump is connected with described condenser, and described vacuum heater and described cold boiler are bled.
Described diluted acid vacuum concentrating apparatus also comprises the forevacuum evaporimeter, and described forevacuum evaporimeter has at least one evaporation chamber, is connected by chamber passage between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set;
The liquid outlet of described forevacuum evaporimeter is connected with the inlet of described one-level vacuum heater, and the inlet of described cold boiler is connected with the liquid outlet of described secondary vacuum heater;
The gas outlet of described forevacuum evaporimeter is connected with the air inlet of described condenser.
Further, described diluted acid vacuum concentrating apparatus also comprises the assisted vacuum evaporimeter, and described vacuum heater also comprises three grades of vacuum heaters;
Described cold boiler and described forevacuum evaporimeter are horizontal type structure, and described assisted vacuum evaporimeter is a vertical structure;
Described assisted vacuum evaporimeter has at least one evaporation chamber, is connected by chamber passage between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set; First inlet that evaporates chamber along the diluted acid flow direction of the liquid outlet of last evaporation chamber and described vacuum heater is connected;
The inlet of described three grades of vacuum heaters is connected with the liquid outlet of described one-level vacuum heater, and the liquid outlet of described three grades of vacuum heaters is connected with the inlet of described secondary vacuum heater;
The inlet of described assisted vacuum evaporimeter is connected with the liquid outlet of described secondary vacuum heater;
The gas outlet of described assisted vacuum evaporimeter is connected with the air inlet of described condenser or three grades of vacuum heaters;
The bottom of described three grades of vacuum heaters is provided with delivery port.
Every grade of described vacuum heater is made up of at least one heating in vacuum chamber, and the liquid outlet of adjacent two heating in vacuum chambers is connected with inlet.
In the described cold boiler, along the flow direction of diluted acid, the vacuum of evaporation chamber increases gradually.
Be provided with multi-layer porous plate in the described condenser, described porous plate has the passage of a plurality of downward extensions; Have the gap between the described porous plate of adjacent two layers, and in the described porous plate of adjacent two layers, the channel outlet that is positioned at the porous plate on upper strata is crisscross arranged with the feeder connection that is positioned at the porous plate of lower floor.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) diluted acid vacuum concentrating apparatus described in the utility model, except described secondary vacuum heater has the external heat source heating, other vacuum heater all is to provide the heating thermal source by the high-temperature steam that cold boiler is discharged, the heat energy that has of the high-temperature steam of discharging from cold boiler is fully utilized like this, not only saved a large amount of heat energy, and reduced the energy that condenser consumes, and saved the energy on the whole, reduced production cost.
(2) diluted acid vacuum concentrating apparatus described in the utility model, in described cold boiler, along the flow direction of diluted acid, the vacuum of evaporation chamber increases gradually; Along with flowing of diluted acid, its temperature reduces gradually, this is provided with the temperature that realized according to dilute acid soln to the corresponding adjustment setting of vacuum, avoided the energy loss that when the diluted acid temperature is higher, still adopts same condition of high vacuum degree to cause, but thereby not only guaranteed spent acid ebullition, gasification in each vacuum evaporation chamber, and reduced the energy that vavuum pump consumes, and saved the energy, reduced production cost.
(3) in the diluted acid vacuum concentrating apparatus described in the utility model, because passage is staggered, when cooling medium enters lower floor's porous plate by the upper strata porous plate, need to enter through the feeder connection through lower floor's porous plate of mutual dislocation after the Clearance Flow between the adjacent two layers porous plate, in this process, the absorption condensation medium is during to described gap location, reduced cooling medium flow velocity on the vertical direction in described condenser to a great extent, and in described gap, carry out slowly flowing, thereby improved the contact area and the time of contact of cooling medium and porous plate, cooling medium is evenly distributed in the condenser.Simultaneously, when steam enters in the condenser, the contact area and the time of contact of steam and porous plate have also increased, thereby steam can fully be contacted with cooling medium, have realized the better condensation effect of steam.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation with diluted acid vacuum concentrating apparatus of two-stage vacuum heater and cold boiler;
Fig. 2 is the structural representation with diluted acid vacuum concentrating apparatus of two-stage vacuum heater, cold boiler and forevacuum evaporimeter;
Fig. 3 is the structural representation with diluted acid vacuum concentrating apparatus of three grades of vacuum heaters, cold boiler, forevacuum evaporimeter and assisted vacuum evaporimeter;
Fig. 4 is the structural representation that is provided with the diluted acid vacuum concentrating apparatus of the cold boiler that the vacuum heater of being made up of a plurality of heating in vacuum chambers, a plurality of vacuum evaporation chamber form;
Fig. 5 is for being provided with the structural representation of multi-layer porous plate in the condenser pipe.
Reference numeral is expressed as among the figure: 1-forevacuum evaporimeter, 2-one-level vacuum heater, 3-secondary vacuum heater, 4-recycling can, the 5-condenser, the 6-vavuum pump, the outlet of 7-gelled acid, 8-circulating pump, 9-assisted vacuum evaporimeter, three grades of vacuum heaters of 10-, 11-cold boiler, 12-passage, the 13-porous plate, the 14-chamber passage, H, A0-heating in vacuum chamber, A1, A2-heating in vacuum chamber, A3~A8-heating in vacuum chamber, V1, V2-evaporate chamber, and V3~V9-evaporates chamber, and V10, V11-evaporate chamber;
Dotted line is represented the flow direction of condensed water or gas, the flow direction of solid line express liquid.
The specific embodiment
Embodiment 1
In the diluted acid vacuum concentrating apparatus, comprise cold boiler 11, vacuum heater, condenser 5 and vavuum pump 6 as shown in Figure 1.
Described cold boiler 11 has at least one evaporation chamber, an evaporation chamber only is set in this embodiment, this evaporation chamber is provided with inlet, liquid outlet and gas outlet, in the present embodiment, described inlet and gas outlet all are arranged on the top of described cold boiler 11, described liquid outlet is arranged on its underpart, and liquid outlet described herein is gelled acid outlet 7.
Described vacuum heater is provided with inlet and liquid outlet, and described vacuum heater comprises one-level vacuum heater 2 and secondary vacuum heater 3.The inlet of described one-level vacuum heater 2 is connected with the liquid outlet of described cold boiler 11, the inlet of described secondary vacuum heater 3 is connected with the liquid outlet of described one-level vacuum heater 2, and the liquid outlet of described secondary vacuum heater 3 is connected with the inlet of described cold boiler 11; Described secondary vacuum heater is connected with external heat source.
The gas outlet of described cold boiler 11 is connected with the air inlet of described one-level vacuum heater 2, utilize the high-temperature steam that produces in the cold boiler 11 to provide thermal source, utilize high-temperature steam that the diluted acid of one-level vacuum heater 2 inside is heated described one-level vacuum heater; Because steam is in the process that diluted acid is heated, it discharges heat energy and is condensed into water, so be provided for discharging the delivery port of condensed water in the bottom of described one-level vacuum heater 2, described in this embodiment delivery port is connected with recycling can 4, stores thereby condensed water entered in the recycling can 4.The gas outlet of described one-level vacuum heater 2 is connected with the air inlet of described condenser 5, be not all gas condensation can be dissolved after described condenser 5 condensations, also can there be some uncooled dissolved gases in portion within it, this part gas is discharged through the gas outlet of condenser, and by the recycling can (not shown) that is connected with described gas outlet it is reclaimed.In described condenser inside any adsorption stuffing is not set, only is added with the condensation adsorption liquid, such as aqueous medium.
Described vavuum pump 6 is connected with described condenser 5, with realization described vacuum heater and described cold boiler is bled, and the vacuum in described vacuum heater and the described cold boiler can be carried out respective settings according to the actual industrial demand.
The course of work of the described diluted acid vacuum concentrating apparatus of present embodiment is: at first, set the vacuum of cold boiler 11 according to the temperature of pending diluted acid, opening vavuum pump 6 bleeds, because the pending diluted acid that obtains in the industry generally all can have 40-50 degree centigrade temperature, so above-mentioned pending diluted acid directly can be injected in the described cold boiler 11, self temperature that relies on that diluted acid has is tentatively evaporated it; Then, under the effect of circulating pump 8, the diluted acid of the preliminary evaporation of process flows out from the liquid outlet of described cold boiler 11, is pumped in the one-level vacuum heater 2 to preheat; When the diluted acid of preliminary evaporation was flowing out, the cold boiler 11 inner steam that produce were discharged through the gas outlet of described cold boiler 11, and this part steam is used for heating to the diluted acid that pumps into described one-level vacuum heater 2; Because the temperature of above-mentioned steam is lower, so can't reaching the diluted acid vacuum, the temperature of the diluted acid after its heating concentrates needed temperature, further heat so need will the diluted acid after preheating processing to flow into again in the described secondary vacuum heater 3, because described secondary vacuum heater 3 heats by external heat source, regulates so it can carry out heat supply to external heat source by needed temperature; At last, enter once more in the described cold boiler 11 through the diluted acid after 3 heating of described secondary vacuum heater and to carry out vacuum evaporation, the gelled acid that the evaporation back obtains is discharged by the gelled acid outlet 7 of cold boiler 11 it is reclaimed.In this course of work, in one-level vacuum heater 2, utilize vapours in the process that diluted acid is heated, the heat exchange of carrying out between the two makes it discharge heat energy and is condensed into water, and enter into described recycling can 4 by delivery port, Ye Hua steam does not then enter in the described condenser 5 by the gas outlet of described one-level vacuum heater 2, is recovered to after the liquefaction in the recycling can (not shown).So just realize making full use of of the vapours of discharging from described cold boiler 11, not only saved a large amount of heat energy, and reduced the energy that described condenser 5 consumes, saved the energy on the whole, reduced production cost.
Embodiment 2
As shown in Figure 2, the difference of diluted acid vacuum concentrating apparatus in the present embodiment and the diluted acid vacuum concentrating apparatus among the embodiment 1 is: described diluted acid vacuum concentrating apparatus also is provided with forevacuum evaporimeter 1.
Described forevacuum evaporimeter 1 has at least one evaporation chamber, is connected by chamber passage 14 between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set; In the present embodiment, an evaporation chamber only is set.
The liquid outlet of described forevacuum evaporimeter 1 is connected with the inlet of described one-level vacuum heater 2, and the inlet of described cold boiler 11 is connected with the liquid outlet of described secondary vacuum heater 3;
The gas outlet of described forevacuum evaporimeter 1 is connected with the air inlet of described condenser 5.
In addition, multi-layer porous plate 13 is set in described condenser 5 also, referring to Fig. 5, described porous plate has the passage 12 of a plurality of downward extensions; Have the gap between the described porous plate 13 of adjacent two layers, and in the described porous plate 13 of adjacent two layers, passage 12 inlets of passage 12 outlets and the porous plate 13 that is positioned at lower floor that are positioned at the porous plate 13 on upper strata are crisscross arranged.Because passage is staggered, when cooling medium enters lower floor's porous plate by the upper strata porous plate, need to enter through the feeder connection through lower floor's porous plate of mutual dislocation after the Clearance Flow between the adjacent two layers porous plate, in this process, the absorption condensation medium is during to described gap location, reduced cooling medium flow velocity on the vertical direction in described condenser to a great extent, and in described gap, carry out slowly flowing, thereby improved the contact area and the time of contact of cooling medium and porous plate, cooling medium is evenly distributed in the condenser.Simultaneously, when steam enters in the condenser, the contact area and the time of contact of steam and porous plate have also increased, thereby steam can fully be contacted with cooling medium, have realized the better condensation effect of steam.Certainly, the embodiment as can conversion also can adopt other condenser of the prior art, as long as steam can be cooled off, is liquefied as liquid.
The course of work of the described diluted acid vacuum concentrating apparatus of present embodiment is: at first, set the vacuum of forevacuum evaporimeter 1 inside according to the temperature of pending diluted acid, and the vacuum of setting cold boiler 11 inside according to the temperature of the diluted acid after the heating, opening vavuum pump 6 bleeds, because the pending diluted acid that obtains in the industry generally all can have 40-50 degree centigrade temperature, so above-mentioned pending diluted acid directly can be injected in the described forevacuum evaporimeter 1, self temperature that relies on that diluted acid has is tentatively evaporated it; Then, under the effect of circulating pump 8, flow out through the diluted acid of preliminary evaporation liquid outlet, be pumped in the one-level vacuum heater 2 and preheat, then enter in the described condenser 5 from described forevacuum evaporimeter 1 inner gas of discharging and dissolve condensation process from described forevacuum evaporimeter 1; Because above-mentioned pre-warmed temperature is lower, so can't reaching the diluted acid vacuum, the temperature of the diluted acid after its heating concentrates needed temperature, further heat so need will the diluted acid after preheating processing to flow into again in the described secondary vacuum heater 3, because described secondary vacuum heater 3 heats by external heat source, regulates so it can carry out heat supply to external heat source by needed temperature; At last, enter once more in the described cold boiler 11 through the diluted acid after 3 heating of described secondary vacuum heater and to carry out vacuum evaporation, the gelled acid that the evaporation back obtains is discharged by the gelled acid outlet 7 of cold boiler 11 it is reclaimed; The steam of the higher temperature of discharging from the gas outlet of described cold boiler 11 then is passed in the described one-level vacuum heater 2 and heats simultaneously.In this course of work, in one-level vacuum heater 2, utilize vapours in the process that diluted acid is heated, the heat exchange of carrying out between the two makes it discharge heat energy and is condensed into water, and enter into described recycling can 4 by delivery port, Ye Hua steam does not then enter in the described condenser 5 by the gas outlet of described one-level vacuum heater 2, is recovered to after the liquefaction in the recycling can (not shown).So just realize making full use of of the vapours of discharging from described cold boiler 11, not only saved a large amount of heat energy, and reduced the energy that described condenser 5 consumes, saved the energy on the whole, reduced production cost.
Embodiment 3
As shown in Figure 3, Figure 4, the diluted acid vacuum concentrating apparatus in the present embodiment and the difference of the diluted acid vacuum concentrating apparatus among the embodiment 2 are: described diluted acid vacuum concentrating apparatus also is provided with assisted vacuum evaporimeter 9, and described vacuum heater also comprises three grades of vacuum heaters 10.
Wherein, described assisted vacuum evaporimeter 9 is a vertical structure; Described assisted vacuum evaporimeter 9 has at least one evaporation chamber, is connected by chamber passage 14 between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set; First inlet that evaporates chamber along the diluted acid flow direction of the liquid outlet of last evaporation chamber and described vacuum heater is connected;
The inlet of described three grades of vacuum heaters 10 is connected with the liquid outlet of described one-level vacuum heater 2, and the liquid outlet of described three grades of vacuum heaters 10 is connected with the inlet of described secondary vacuum heater 3;
The inlet of described assisted vacuum evaporimeter 9 is connected with the liquid outlet of described secondary vacuum heater 3;
The gas outlet of described assisted vacuum evaporimeter 9 is connected with the air inlet of described condenser 5 or three grades of vacuum heaters 10;
The bottom of described three grades of vacuum heaters 10 is provided with delivery port.
Cold boiler 11 shown in Figure 3, forevacuum evaporimeter 1, assisted vacuum evaporimeter 9 and vacuum heater all are only to have an evaporation chamber or a heating in vacuum chamber, as embodiment that can conversion, as shown in Figure 4, described cold boiler 11, forevacuum evaporimeter 1, assisted vacuum evaporimeter 9 have a plurality of evaporation chambers, every grade of described vacuum heater has a plurality of heating in vacuum chambers, and the liquid outlet of adjacent two heating in vacuum chambers is connected with inlet.Described cold boiler 11, forevacuum evaporimeter 1 are horizontal type structure.
And preferably in described cold boiler 11, along the flow direction of diluted acid, the vacuum of evaporation chamber increases gradually; Because along with flowing of diluted acid, its temperature reduces gradually, can evaporate smoothly in order to guarantee it, just need its vacuum of corresponding raising.
As preferred embodiment, described condenser 5 also can be provided with multistage equally, thereby improves the condensation effect to gas.
The course of work of the described diluted acid vacuum concentrating apparatus of present embodiment is: at first, set the vacuum of forevacuum evaporimeter 1 inside according to the temperature of pending diluted acid, and the vacuum of setting cold boiler 11 inside according to the temperature of the diluted acid after the heating, opening vavuum pump 6 bleeds, because the pending diluted acid that obtains in the industry generally all can have 40-50 degree centigrade temperature, so above-mentioned pending diluted acid directly can be injected in the described forevacuum evaporimeter 1, self temperature that relies on that diluted acid has is tentatively evaporated it, and successively through evaporation chamber V10, V11; The gas of discharging from described forevacuum evaporimeter 1 inside then enters in the described condenser 5 and dissolves condensation process; Then, under the effect of circulating pump 8, from described forevacuum evaporimeter 1, evaporate the liquid outlet outflow of chamber V11 through the diluted acid of preliminary evaporation, be pumped in the one-level vacuum heater 2 and preheat, because one-level vacuum heater 2 is provided with multistage in the present embodiment, can see among the figure and be respectively heating in vacuum chamber A3-A8, diluted acid passes through heating in vacuum chamber A8 successively like this, A7, A6, A5, A4, after heating, A3 enters in three grades of vacuum heaters 10, and heating in vacuum chamber A2 and the A1 in described three grades of vacuum heaters 10 further heats successively, the temperature of diluted acid still can't reach the concentrated needed temperature of diluted acid vacuum after above-mentioned heating, so need to flow into again in the described secondary vacuum heater 3 through the diluted acid after the above-mentioned heat treated further to heat, because described secondary vacuum heater 3 heats by external heat source, regulates so it can carry out heat supply to external heat source by needed temperature; At last, successively through the heating in vacuum chamber A0 of described secondary vacuum heater 3 and the diluted acid after the H heating, need be introduced in the assisted vacuum evaporimeter 9 of vertical structure and evaporate, and successively through behind evaporation chamber V1 and the V2, to discharge through liquid outlet through the diluted acid after the assisted evaporative and flow in the cold boiler 11, the steam that obtains in assisted vacuum evaporimeter 9 simultaneously has higher temperature, this part steam heats diluted acid in described three grades of vacuum heaters 10 are delivered in the gas outlet, or discharges after described condenser 5 is handled.
When diluted acid enters in the cold boiler 11, in evaporation chamber V3, evaporate earlier, diluted acid after the evaporation process is discharged and is entered in the evaporation chamber V4 through the inlet of evaporation chamber V4 through the liquid outlet of evaporation chamber V3 and carries out further evaporation process, and the steam that produces in evaporation chamber V3 is then discharged through the gas outlet and is delivered to heating in vacuum chamber A3 the diluted acid in it is heated simultaneously; Diluted acid is handled, and the indoor steam correspondence that obtains of above-mentioned evaporation cavity is delivered to heating in vacuum chamber A4, A5, A6, A7, A8 through evaporation chamber V4, V5, V6, V7, V8 successively like this; The gelled acid of Huo Deing is then discharged from the liquid outlet of evaporation chamber V9 at last.
In this course of work, in one-level vacuum heater 2 and three grades of vacuum heaters 10, utilize vapours in the process that diluted acid is heated, the heat exchange of carrying out between the two makes it discharge heat energy and is condensed into water, and enter into described recycling can 4 by delivery port, Ye Hua steam does not then enter in the described condenser 5 by the gas outlet of described one-level vacuum heater 2, is recovered to after the liquefaction in the recycling can (not shown).So just realize making full use of of the vapours of discharging from described cold boiler 11, not only saved a large amount of heat energy, and reduced the energy that described condenser 5 consumes, saved the energy on the whole, reduced production cost.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.

Claims (6)

1. a diluted acid vacuum concentrating apparatus comprises cold boiler, vacuum heater, condenser and vavuum pump;
Described cold boiler has at least one evaporation chamber, all is provided with inlet, liquid outlet and gas outlet on each described evaporation chamber, and the liquid outlet of adjacent two evaporation chambers is connected with inlet;
Described vacuum heater is provided with inlet and liquid outlet;
It is characterized in that:
Described vacuum heater comprises the one-level vacuum heater and has the secondary vacuum heater of external heat source that the inlet of described one-level vacuum heater is connected with the liquid outlet of described cold boiler; The inlet of described secondary vacuum heater is connected with the liquid outlet of described one-level vacuum heater, and the liquid outlet of described secondary vacuum heater is connected with the inlet of described cold boiler;
The gas outlet of described cold boiler is connected with the air inlet of described one-level vacuum heater; Described one-level vacuum heater bottom is provided with delivery port;
The gas outlet of described one-level vacuum heater is connected with the air inlet of described condenser, and uncooled gas is through the exhaust of the gas outlet of described condenser;
Described vavuum pump is connected with described condenser, and described vacuum heater and described cold boiler are bled.
2. diluted acid vacuum concentrating apparatus according to claim 1 is characterized in that, also comprises the forevacuum evaporimeter, and described forevacuum evaporimeter has at least one evaporation chamber, is connected by chamber passage between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set;
The liquid outlet of described forevacuum evaporimeter is connected with the inlet of described one-level vacuum heater, and the inlet of described cold boiler is connected with the liquid outlet of described secondary vacuum heater;
The gas outlet of described forevacuum evaporimeter is connected with the air inlet of described condenser.
3. diluted acid vacuum concentrating apparatus according to claim 2 is characterized in that, also comprises the assisted vacuum evaporimeter, and described vacuum heater also comprises three grades of vacuum heaters;
Described cold boiler and described forevacuum evaporimeter are horizontal type structure, and described assisted vacuum evaporimeter is a vertical structure;
Described assisted vacuum evaporimeter has at least one evaporation chamber, is connected by chamber passage between the described evaporation chamber; Along the flow direction of diluted acid, on first evaporation chamber, inlet is set, in the end on an evaporation chamber liquid outlet is set; First inlet that evaporates chamber along the diluted acid flow direction of the liquid outlet of last evaporation chamber and described vacuum heater is connected;
The inlet of described three grades of vacuum heaters is connected with the liquid outlet of described one-level vacuum heater, and the liquid outlet of described three grades of vacuum heaters is connected with the inlet of described secondary vacuum heater;
The inlet of described assisted vacuum evaporimeter is connected with the liquid outlet of described secondary vacuum heater;
The gas outlet of described assisted vacuum evaporimeter is connected with the air inlet of described condenser or three grades of vacuum heaters;
The bottom of described three grades of vacuum heaters is provided with delivery port.
4. according to claim 1 or 2 or 3 described diluted acid vacuum concentrating apparatus, it is characterized in that every grade of described vacuum heater is made up of at least one heating in vacuum chamber, the liquid outlet of adjacent two heating in vacuum chambers is connected with inlet.
5. diluted acid vacuum concentrating apparatus according to claim 4 is characterized in that, in the described cold boiler, along the flow direction of diluted acid, the vacuum of evaporation chamber increases gradually.
6. according to claim 1 or 2 or 3 or 5 described diluted acid vacuum concentrating apparatus, it is characterized in that be provided with multi-layer porous plate in the described condenser, described porous plate has the passage of a plurality of downward extensions; Have the gap between the described porous plate of adjacent two layers, and in the described porous plate of adjacent two layers, the channel outlet that is positioned at the porous plate on upper strata is crisscross arranged with the feeder connection that is positioned at the porous plate of lower floor.
CN201120027542XU 2011-01-27 2011-01-27 Vacuum concentration device for diluted acid Expired - Lifetime CN201906471U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104606906A (en) * 2015-02-03 2015-05-13 辽宁迈科技术发展有限责任公司 Sixteen-stage acid bath evaporation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104606906A (en) * 2015-02-03 2015-05-13 辽宁迈科技术发展有限责任公司 Sixteen-stage acid bath evaporation device

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