CN107913525A - The retracting device and recovery method of low-boiling point material - Google Patents
The retracting device and recovery method of low-boiling point material Download PDFInfo
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- CN107913525A CN107913525A CN201710416334.0A CN201710416334A CN107913525A CN 107913525 A CN107913525 A CN 107913525A CN 201710416334 A CN201710416334 A CN 201710416334A CN 107913525 A CN107913525 A CN 107913525A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/02—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
- B01D1/2803—Special features relating to the vapour to be compressed
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Abstract
The present invention, which provides, can recycle low-boiling point material with high concentration and can realize the low-boiling point material retracting device and recovery method of energy-saving.Ammonia recovery unit (1) possesses：Destilling tower (2), it is blown into water for heating steam and is stripped；Evaporator (3), it is evaporated the water by making from the steam containing ammonia of the top of tower discharge of destilling tower with water progress heat exchange；Compression set (4), it is compressed the vapor discharged from evaporator heating and is discharged as water for heating steam to destilling tower；Concentration tower (5), it imports the steam containing ammonia after being concentrated by evaporator, which is cooled down and removes moisture, so as to improving the concentration of the steam containing ammonia to high concentration (such as more than 20wt%)；First absorption tower (6), it makes the moisture of vapor adsorption containing ammonia from concentration tower and generates the recycling ammonium hydroxide of normal concentration；And second absorption tower (7), it prevents the uncooled steam containing ammonia in the first absorption tower to be discharged to outside.
Description
Technical field
The present invention relates to from containing low-boiling point materials such as ammonia draining separation and recovery low-boiling point material retracting device and
Recovery method.
Background technology
As the method being separated off to draining containing ammonia, it is known that vaporizing extract process.In the common ammonia using the vaporizing extract process
In retracting device, possess and carry out steam stripped destilling tower, the steam containing ammonia using condenser to the top of tower discharge from the destilling tower
Segregated, condensed water returns to the top of tower of destilling tower as phegma, and the steam containing ammonia after remaining concentration is supplied to
Absorption tower, by water absorb so as to be exported as recycling ammonium hydroxide.
However, vaporizing extract process used in such ammonia recovery unit is directly to be blown into vapor to the tower bottom of destilling tower
Method, largely using vapor, therefore operating cost is high and require the reduction of processing cost.On the other hand, in the method, produce
The raw and input approximately equal amounts of vapor containing ammonia of vapor, but in order to become time for the top of tower for flowing to destilling tower
Flow liquid and recycling ammoniacal liquor using the heat exchanger for being arranged at top of tower (condenser), it is necessary to be cooled down, energy is by once
Property use.
In order to eliminate the problem of such, it is proposed that the steam of the top of tower discharge from destilling tower is carried out by Pistonless compressor
Compression, carries out recuperation of heat using reboiler and reduces steam vapour amount (with reference to following patent document 1).In addition, it is proposed that as follows
Structure：Supply make-up water to the condenser segregated from the steam containing ammonia of the top of tower of destilling tower discharge, make make-up water with
Steam containing ammonia carry out heat exchange and evaporate, direct it to Pistonless compressor and be compressed, heat up and as vapor and again
Utilize (with reference to following patent document 2).
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2002-28637 publications
Patent document 2：Japanese Unexamined Patent Publication 2004-114029 publications
Problems to be solved by the invention
Conventional example disclosed in above-mentioned patent document 1,2 efficiently uses the steam containing ammonia from the top of tower discharge of destilling tower
Heat, to realize energy-saving, realize the reduction of operating cost.
However, include at least destilling tower, heat exchanger (reboiler or condenser such：The reboiler or condenser
It is suitable with the evaporator of the application) and Pistonless compressor conventional example structure in, if being intended to recycle such as more than 20wt%'s
High strength ammonia, then produce the problem of following such.That is, if it is intended to only carry by heat exchanger (suitable with the evaporator of the application)
Height arrive high concentration, then the entrance of the steam containing ammonia in heat exchanger and the temperature difference of outlet become larger, correspondingly Pistonless compressor
Load becomes too much and violates and this energy saving requirement is realized by the use of Pistonless compressor.It is it should be noted that above-mentioned
Problem is not limited to widely common in the retracting device comprising low-boiling point material comprising the retracting device of ammonia.
Then, seek that ammonia can be recycled with high concentration all the time and can realize that the low-boiling point material of energy-saving recycles
Device.
The content of the invention
The present application is found out in view of the above problems, its object is to, there is provided low boiling can be recycled with high concentration
Put material and can realize the low-boiling point material retracting device and recovery method of energy-saving.
Solutions to solve the problem
In order to achieve the above object, technical solution 1 is related to a kind of low-boiling point material retracting device, it is characterised in that it has
It is standby：Destilling tower, it makes the stoste comprising low-boiling point material be contacted with water for heating steam, makes low-boiling point material from the stoste point
From and gasify and as the steam comprising low-boiling point material and from top of tower discharge, and will be after stoste removes low-boiling point material
Processing water be stored in tower bottom；Evaporator, it includes low-boiling point material by making from the top of tower discharge of the destilling tower
Steam and water carry out heat exchange, and the steam fractional condensation comprising the low-boiling point material will be included the low-boiling point material
Steam concentration, and make the water evaporation and discharged as vapor；Compression set, it is to discharging from the evaporator
Vapor is compressed heating, and the vapor compressed after heating up is guided to the destilling tower and is used as what is used in destilling tower
Water for heating steam and utilize；And concentration tower, it imports the steam for including low-boiling point material after being segregated by the evaporator,
The steam is cooled down and removes moisture, thus further concentrates the steam for including low-boiling point material.
According to said structure, evaporator and the concentration tower being configured at after evaporator are provided with, for being discharged from destilling tower
Steam containing ammonia, by the concentration in two stages carried out by evaporator and concentration tower, can generate defined high concentration (such as
More than 20wt%) the steam for including low-boiling point material.According to this structure, with only defined height is concentrated into by evaporator
The structure of concentration (such as more than 20wt%) is compared, and can prevent the load of compression set from becoming too much.It is as a result, available
It can realize energy-saving and the retracting device of the steam containing low-boiling point material of high concentration (such as more than 20wt%) can be generated.
As " low-boiling point material ", esters such as ketone, the methyl acetates such as alcohols, the acetone such as ammonia, methanol etc. can be applied.
As " water ", pure water, soft water, ion exchange water etc. can be applied.
Technical solution 2 is based on the low-boiling point material retracting device described in technical solution 1, it is characterised in that described low
The retracting device of boilers possesses preheater, which is arranged at the processing water for the tower bottom that would be stored at the destilling tower
To the midway of the pumping-out line of outside discharge, make the water that is used in the evaporator in advance with the processing hydrothermal exchange and it is right
The water used in the evaporator is heated.
According to said structure, by being preheated to the water used in evaporator, the heat friendship in evaporator can be realized
Energy-saving when changing.
Technical solution 3 is based on the low-boiling point material retracting device described in technical solution 1, it is characterised in that described low
The retracting device of boilers possesses：Heat exchanger, its be arranged at the storage liquid for the tower bottom that would be stored at the concentration tower to
The midway of the recycle circuit of top of tower guiding, the storage liquid for making to flow in recycle circuit carry out heat exchange with cooling water,
So as to be cooled down to storage liquid；Temperature sensor, it detects the temperature of the storage liquid for the tower bottom for being stored in the concentration tower；
And control valve, it adjusts the stream of the cooling water by the heat exchanger according to the testing result of the temperature sensor
Amount.
According to said structure, the aperture of control valve is controlled according to the testing result of temperature sensor, adjusts and is handed over by heat
The flow of the cooling water of parallel operation.Thus, by the storage liquid (steam containing low-boiling point material for the tower bottom that would be stored at concentration tower
Condensate liquid) be cooled to set point of temperature and vaporific injection, can generate defined high concentration (such as more than 20wt%) contains ammonia
Steam.
Technical solution 4 is based on the low-boiling point material retracting device described in technical solution 1, it is characterised in that the pressure
Compression apparatus is connected in parallel by multiple Pistonless compressors to form.
Technical solution 5 based on the retracting device of the low-boiling point material described in any one of technical solution 1 to 4, its
It is characterized in that, the low-boiling point material is ammonia.
Technical solution 6 is related to the recovery method of low-boiling point material, it is characterised in that including：The first step, blows to destilling tower
Enter water for heating steam, the stoste comprising low-boiling point material is contacted with water for heating steam, make low-boiling point material from the original
Liquid separates and gasifies and discharged as the steam comprising low-boiling point material and from the top of tower of destilling tower, and will be removed from stoste
Processing water after low-boiling point material is stored in the tower bottom of destilling tower；The second step, by making the top of tower from the destilling tower
The steam comprising low-boiling point material and the water of discharge carry out heat exchange, and make the steam fractional condensation comprising the low-boiling point material so that
It will be concentrated comprising the steam of the low-boiling point material, and make the water evaporation and discharged as vapor；The third step is right
Heating is compressed from the vapor of evaporator discharge, the vapor after heating up will be compressed and guided simultaneously to the destilling tower
Utilized as the water for heating steam used in destilling tower；And the fourth step, import the bag after being segregated by the evaporator
Steam containing low-boiling point material, cools down the steam and removes moisture, and thus further concentration includes low-boiling point material
Steam.
According to said structure, may make up can recycle low-boiling point material with high concentration and can realize the low boiling of energy-saving
The recovery method of point material.
Invention effect
In accordance with the invention it is possible to recycle low-boiling point material with high concentration, and it can realize energy-saving.
Brief description of the drawings
Fig. 1 is the overall structure figure of the ammonia recovery unit of embodiment.
Fig. 2 is the enlarged drawing near evaporator.
Fig. 3 is the enlarged drawing near concentration tower.
Description of reference numerals：
1：Ammonia recovery unit；
2：Destilling tower；
3：Evaporator；
4：Compression set；
5：Concentration tower；
6：First absorption tower；
7：Second absorption tower；
18、19：Pistonless compressor.
Embodiment
Hereinafter, the present invention is described based on embodiment in detail.It should be noted that in the following embodiments, make
For low-boiling point material retracting device, illustrate using draining containing ammonia as stoste and be separated off ammonia from draining containing ammonia from this and recycled
Ammonia recovery unit illustrate.As low-boiling point material, in addition to ammonia, alcohols, the acetone such as methanol can also be applied to
Deng esters such as ketone, methyl acetates.
(embodiment)
Fig. 1 is the overall structure figure of the ammonia recovery unit of embodiment.Ammonia recovery unit (the low boiling point with the present application
Material retracting device is suitable) 1 possess：Destilling tower 2, it is blown into water for heating steam, and is stripped；Evaporator 3, its make from
The steam containing ammonia of the top of tower discharge of destilling tower 2 carries out heat exchange with water and evaporates the water；Compression set 4, it is to from evaporator 3
The vapor of discharge is compressed heating, becomes water for heating steam and is discharged to destilling tower 2；Concentration tower 5, it imports quilt
Evaporator 3 concentrate after steam containing ammonia, which is cooled down and to remove moisture paramount by the raising of the concentration of the steam containing ammonia
Concentration (such as more than 20wt%)；First absorption tower 6, it makes the moisture of vapor adsorption containing ammonia from concentration tower 5, and generation regulation is dense
The recycling ammonium hydroxide of degree；And second absorption tower 7, it is outer that it prevents that the uncooled steam containing ammonia in the first absorption tower is discharged to
Portion.Here, the briefing of the feature of the ammonia recovery unit 1 of explanation present embodiment 1, is provided with evaporator 3 and is configured at steaming
Send out the concentration tower 5 after device 3, for the steam containing ammonia discharged from destilling tower 2, by carried out by evaporator 3 and concentration tower 5 two
The concentration in a stage, can recycle the ammonium hydroxide of defined high concentration (such as more than 20wt%).
Hereinafter, including above-mentioned feature structure illustrates the concrete structure of ammonia recovery unit 1 interiorly.Destilling tower 2 can make
With multistage destilling tower 2, in addition, being not limited to this, it is not multistage destilling tower 2 that can also use.That is, destilling tower 2 can make
With plate column, packed column.Via stoste supply pipe L1 to the top of tower supply stoste (draining containing ammonia) of the destilling tower 2.Need
Illustrate, pH adjustment can also be carried out to stoste in advance.
Supplied the heating from vapor steam blaster 10 with steam supply pipe L3 via heating to the tower bottom of destilling tower 2 and used
Vapor.The tower bottom of destilling tower 2 is connected, the storage liquid (low concentration ammonium hydroxide) of the tower bottom via pipe L4 with recuperation of heat groove 11
Recuperation of heat groove 11 is supplied to via pipe L2.Vapor steam blaster 10 is attraction, the steam compressed mechanism of compression for carrying out steam,
In steam suction side, 10a is connected with the steam supply pipe L5 for the steam flow from the supply (not shown) of the high pressure such as boiler vapor source
And the steam extended from recuperation of heat groove 11 recycles pipe L6.According to this structure, the storage liquid flash distillation in recuperation of heat groove 11
Evaporate and simultaneously attracted by vapor steam blaster 10, compress, mixed with the steam from steam supply pipe L5 be incorporated as heating steam and
It is blown into the tower bottom of destilling tower 2.Liquid flash vaporization is stored like this in recuperation of heat groove 11 and as the one of heating steam
Partly it is reused, so as to carry out the recycling of heat.
It should be noted that the bottom of recuperation of heat groove 11 is connected with discharge processing water (such as the low concentration ammonia of below 30ppm
Water) discharge pipe L7, processing water discharge pump P1 and three heat exchanger H1, H2, H3 are provided with discharge pipe L7.
Heat exchanger H1 is the water heater for making water carry out heat exchange with handling water and be heated to water.Heated by heat exchanger H1
Water afterwards is supplied to the bottom of evaporator 3 via water supplying pipe L8.Heat exchanger H2 is stoste is carried out hot friendship with processing water
The stoste preheater for changing and being preheated to stoste.By heat exchanger H2 preheat after stoste via stoste supply pipe L1 and by
Supply to the top of tower of destilling tower 2.Heat exchanger H3 is cooling water is carried out heat exchange with processing water and processing water is carried out cold
But cooler.It is discharged to by heat exchanger H3 processing water after cooling via discharge pipe L7 outside system.
Heat exchanger H1, H2, H3 are located on discharge pipe L7 than the processing water discharge position for pumping P1 downstreams, and with
Following order is set.That is, on discharge pipe L7, heat exchanger H1 is arranged on the position than heat exchanger H2 on the upstream side.It is logical
Cross and set with such order, the heat given from processing water to water is maximum, therefore can be in the evaporator 3 heated to water
In realize energy-saving.Further, since the reasons why setting heat exchanger H3 is for cooling treatment water, therefore heat exchanger H3 is set
In the position than heat exchanger H1, H2 downstreams.
Evaporator 3 is made of horizontal cast evaporator 12, possesses sprinkler 13 and indirect type heater 14.Need to illustrate
, horizontal cast is not limited to, the evaporator such as (longitudinal tubule (L tubule)) formula under Film Flow can also be used.As shown in Fig. 2, indirectly
Formula heater 14 possesses the heat conducting pipe group 15 being made of one or more horizontal heat conducting pipes and pair of right and left collection pipe fitting 16A, 16B.
In addition, the bottom of evaporator 12 becomes the reservoir 17 that storage supplies the water come via pipe L8.The storage liquid of reservoir 17
(water) is configured to be circulated as follows：Set by circulating pump P2 via the pipe L9 tops being supplied in evaporator 12
Sprinkler 13, after being sprayed from the sprinkler 13 towards the outer surface of heat conducting pipe group 15, the reservoir of the lower part into evaporator 12
17 flow down.
Collection pipe fitting 16B is connected via steam supply pipe L10 with the top of tower of destilling tower 2, is arranged from the top of tower of destilling tower 2
The overhead vapours (steam containing ammonia) gone out are directed to collection pipe fitting 16B through steam supply pipe L10, then in heat conducting pipe group 15
Circulation.Here, evaporator 3 is formed as the pressure lower than the pressure of overhead vapours, therefore the circulation fluid sprayed by sprinkler 13
(water) carries out thin film evaporation on the surface of heat conducting pipe group 15, thus produces vapor.The vapor is supplied to compression set 4.
Here, the principle for making vapor in evaporator 3 is explained in more detail, in evaporator 3, there is the water after being heated
The pressure that pressure ratio on the outside of heat conducting pipe becomes the overhead vapours (on the inside of heat conducting pipe) of heating source is low, therefore water can evaporate.Need
Illustrate, which is produced by compression set 4 (specifically Pistonless compressor 18,19).This is because filled with compression
The pressure put on the outside of the evaporator heat conducting pipe of 4 suction side connection is low, in the destilling tower 2 being connected with the discharge side of compression set 4
And the pressure of overhead vapours is high.In addition, the pressure in destilling tower 2 also rises because of the steam supplied from vapor steam blaster 10,
As a reason of the water evaporation in evaporator 3.
In addition, circulation and condensed condensed water (low concentration ammonium hydroxide) are stored for collection pipe fitting 16A in heat conducting pipe group 15,
The top of tower of destilling tower 2 is returned to as phegma via pipe L11 by the driving of condensate pump P3.Remaining residual vapor
(steam containing ammonia after concentration) is discharged to the top of tower of concentration tower 5 via pipe L12.
Compression set 4 possesses two Pistonless compressors 18,19, these Pistonless compressors 18,19 are configured to be connected in parallel
The tower bottom of destilling tower 2 and the top of evaporator 10.That is, the entrance side 18a of Pistonless compressor 18 via pipe L15 and and evaporator
12 top connection, the outlet side 18b of Pistonless compressor 18 are connected via pipe L15 with the tower bottom of destilling tower 2.It is steam compressed
The entrance side 19a of machine 19 is connected via the branched pipe L17 from pipe L5 branches with the top of evaporator 10, Pistonless compressor 19
Outlet side 19b is connected via pipe L18 with the tower bottom of destilling tower 2.
Here, as Pistonless compressor 18,19, the big roots-type Pistonless compressor of maximum differential pressure is used.But in this hair
In bright, roots-type Pistonless compressor is not limited to, turbine type Pistonless compressor, spiral Pistonless compressor, the wing can also be used
Either one in formula Pistonless compressor and other Pistonless compressors.In addition, although compression set 4 is in the present embodiment by two
Platform Pistonless compressor 18,19 is formed, but can also be made of a Pistonless compressor or the Pistonless compressor of more than three.
Concentration tower 5 is made of aerosol washer.The storage liquid (condensate liquid) for being stored in the tower bottom of concentration tower 5 is spraying
Mist pipe (suitable with the recycle circuit of the present application) L20 flows, and is directed to top of tower, by towards top of tower internal spraying.
The midway of injection spray pipe L20 is provided with circulating pump P4 and heat exchanger H4.In the storage liquid that injection spray pipe L20 flows in heat exchange
Heat exchange is carried out with cooling water and be cooled in device H4.It should be noted that the as shown in figure 3, pipe L21 flowed in Cooling Water
Control valve V1 is provided with, the temperature sensor T being detected by the temperature of the storage liquid of the tower bottom to being stored in concentration tower 5 is controlled
Aperture processed.That is, control valve V1 apertures are controlled according to the testing result of temperature sensor T, adjustment is cold by heat exchanger H4's
But the flow of water.Thus, by the way that storage liquid (condensate liquid) is cooled to set point of temperature and is sprayed, defined height can be generated
The steam containing ammonia of concentration (such as more than 20wt%).
In addition, injection spray pipe L20 is as shown in Figure 2 in branched halfway, the branched pipe L22 of the branch and the tower of destilling tower 2
Top connects.Control valve V2 is equipped with the midway of branched pipe L22.In addition, as shown in Fig. 2, it is equipped with concentration tower 5 to storage liquid
The liquid level sensor S1 that liquid level is detected.Liquid level sensor S has position switch S1a and the detection of upper limit of detection setting position
The position switch S1b of lower limit set position.By the aperture of liquid level sensor S1 control control valves V2, storage liquid is set to be maintained rule
Determine liquid level, and the storage liquid more than regulation liquid level is back to the top of tower of destilling tower 2.
First absorption tower 6 is made of the aerosol washer same with concentration tower 5, in the storage for the first absorption tower 6
The injection spray pipe L23 of liquid circulation is equipped with circulating pump P5 and heat exchanger H5.In heat exchanger H5, in injection spray pipe L23 flowings
Store liquid and carry out heat exchange with cooling water, storage liquid is cooled.By to via pipe L24 and the high concentration that is imported from concentration tower 5
Storage liquid after the vaporific spray cooling of the steam containing ammonia of (such as more than 20wt%), so that the condensation of ammonia steam, recycling will be contained, thus
Generation recycling ammonium hydroxide.It should be noted that injection spray pipe L23 is in branched halfway, recycling ammonium hydroxide via the branched pipe L25 of the branch and
It is discharged to outside system.
Second absorption tower 7 is inhaled by being formed with 6 same aerosol washer of the first absorption tower via pipe L30 to second
Receive the tower bottom supply water of tower 7, be stored in the water of tower bottom by the driving of circulating pump P6 via injection spray pipe L31 and from top of tower
Vaporific injection.Between the first absorption tower 6 and second absorption tower 7, equipped with by the uncooled steam containing ammonia in the first absorption tower 6 to
The pipe L32 of the top of tower guiding of second absorption tower 7 and the pipe for making the first absorption tower 6 of condensed water return in second absorption tower 7
L33.In addition, second absorption tower 7 top of tower be equipped with will except after deammoniation steam discharge exhaust pipe L34.
It should be noted that in Fig. 1~Fig. 3, L40 is cooling water supply pipe, and L41 is divided from cooling water supply pipe L40
The pipe of branch, L21 is from the pipe of cooling water supply pipe L40 branches, heat exchanger H5 is equipped with cooling water supply pipe L40, in pipe
L41 is equipped with heat exchanger H2, and heat exchanger H4 is equipped with pipe L21.
Next, the processing action of the ammonia recovery unit 1 of explanation said structure.Destilling tower 2 is blown into water for heating steam
And stripped.That is, in destilling tower 2, stoste is contacted with water for heating steam, from stoste separation of ammonia and be allowed to gasify and make
Discharge from top of tower for the steam comprising ammonia, and make the low concentration ammonium hydroxide (such as below 30ppm) after deammoniation is removed from stoste
Tower bottom is stored in for processing water.
The steam containing ammonia discharged from the top of tower of destilling tower 2 is directed to collection pipe fitting 16B via steam supply pipe L10,
Then the circulation in the heat conducting pipe group 15, thus, the circulation fluid (water) sprayed by sprinkler 13 the surface of heat conducting pipe group 15 into
Row thin film evaporation, produces vapor.The vapor is supplied to Pistonless compressor 18,19.On the other hand, in heat conducting pipe group 15
Circulate and condensed condensed water (low concentration ammonium hydroxide) is stored in collection pipe fitting 16A, steaming is returned as phegma via pipe L11
The top of tower of tower 2 is evaporated, remaining residual vapor (steam containing ammonia after concentration) is supplied to concentration tower 5 via pipe L12.
In Pistonless compressor 18,19, heating is compressed to the vapor being supplied to as water for heating steam
And put into the tower bottom of destilling tower 2.Thereby, it is possible to cut down the water for heating steam from heating steam supply pipe L3 supplies, energy
Enough realize energy-saving.
On the other hand, in concentration tower 5, the aperture of control valve V1 is controlled according to the testing result of temperature sensor T, is adjusted
The flow of the whole cooling water by heat exchanger H4.Thus, it is cooled to set point of temperature from the vaporific injection of top of tower of concentration tower 5
Storage liquid (condensate liquid), make steam containing ammonia segregate so that generate defined high concentration (such as more than 20wt%) containing ammonia steam
Gas.It should be noted that condensate liquid all returns to the top of tower of destilling tower 2 as phegma.In this way, in concentration tower 5, lead
Enter the steam containing ammonia after being segregated by evaporator 3, remove moisture and further concentrate the steam comprising ammonia, according to this structure,
Compared with the structure of defined high concentration (such as more than 20wt%) is only concentrated into by evaporator 3, it can prevent steam compressed
The load of machine 18,19 becomes too much.As a result, energy-saving can be realized, and can generate high concentration (such as 20wt% with
On) steam containing ammonia.
Next, in the first absorption tower 6, via injection spray pipe L23 from the storage liquid of the vaporific injection tower bottom of top of tower,
According to this structure, from concentration tower 5 is via pipe L24 and imported steam containing ammonia is condensed, generate the ammonia containing high concentration
Recovery ammonia water (recycling ammonium hydroxide).In second absorption tower 7, via pipe L32 guiding in the first absorption tower 6 slightly it is remaining not
The ammonia gas of condensation and the water that is supplied outside system via injection spray pipe L31 from the vaporific injection of top of tower, according to this structure,
Uncooled ammonia gas is absorbed.Water after absorbing ammonia reverts to the condensate liquid on the first absorption tower 6.As a result, it can prevent
Uncooled ammonia gas is discharged to outside.It should be noted that except the gas after deammoniation from exhaust pipe L34 discharge.
(other business)
(1) in the above-described embodiment, it is illustrated with supplying the structure of " water " to evaporator 3, second absorption tower 7,
But pure water, soft water, ion exchange water etc. can specifically be applied by being somebody's turn to do " water ".
(2) in addition, as reference, being used as the structure of destilling tower heat source using the steam of destilling tower is directly compressed
In the case of (such as patent document 1 etc.), by directly compressing the steam of destilling tower, there is the danger containing the corrosion caused by material
The possibility of burn into leakage at danger, sealing.On the other hand, evaporated the water simultaneously directly using evaporator as the present invention
In the case of connecing the structure for destilling tower, the steam (vapor) for being directly used in destilling tower contains material, therefore energy
Enough prevent the generation containing the burn into leakage caused by material.
Industrial applicability
The present invention can be applied to the recycling dress from the draining separation and recovery low-boiling point material containing low-boiling point materials such as ammonia
Put and recovery method.
Claims (6)
1. a kind of retracting device of low-boiling point material, it is characterised in that it possesses：
Destilling tower, it makes the stoste comprising low-boiling point material be contacted with water for heating steam, makes low-boiling point material from the stoste
Separate and gasify and discharged as the steam comprising low-boiling point material and from top of tower, and low-boiling point material will be removed from stoste
Processing water afterwards is stored in tower bottom；
Evaporator, it is by making the steam comprising low-boiling point material that the top of tower from the destilling tower is discharged carry out hot friendship with water
Change, and make the steam fractional condensation comprising the low-boiling point material so as to be concentrated comprising the steam of the low-boiling point material, and make
The water evaporation is simultaneously discharged as vapor；
Compression set, it is compressed heating to the vapor discharged from the evaporator, will compress the vapor after heating up
Guide to the destilling tower and utilized as the water for heating steam used in destilling tower；And
Concentration tower, its import by the evaporator segregate after the steam for including low-boiling point material, which is cooled down and
Moisture is removed, thus further concentrates the steam for including low-boiling point material.
2. the retracting device of low-boiling point material according to claim 1, wherein,
The retracting device of the low-boiling point material possesses preheater, which is arranged at the bottom of towe that would be stored at the destilling tower
The processing water in portion to the midway of the pumping-out line of outside discharge, make the water that is used in the evaporator in advance with the processing water
Heat exchange and the water to being used in the evaporator heats.
3. the retracting device of low-boiling point material according to claim 1, wherein,
The retracting device of the low-boiling point material possesses：
Heat exchanger, it is arranged at the recycle circuit that the storage liquid for the tower bottom that would be stored at the concentration tower is guided to top of tower
Midway, the storage liquid that is flowed in recycle circuit is carried out heat exchange with cooling water, so as to be cooled down to storage liquid；
Temperature sensor, it detects the temperature of the storage liquid for the tower bottom for being stored in the concentration tower；And
Control valve, it adjusts the stream of the cooling water by the heat exchanger according to the testing result of the temperature sensor
Amount.
4. the retracting device of low-boiling point material according to claim 1, wherein,
The compression set is connected in parallel by multiple Pistonless compressors to form.
5. the retracting device of low-boiling point material according to any one of claim 1 to 4, wherein,
The low-boiling point material is ammonia.
A kind of 6. recovery method of low-boiling point material, it is characterised in that including：
The first step, water for heating steam is blown into destilling tower, the stoste comprising low-boiling point material is connect with water for heating steam
Touch, low-boiling point material is separated from the stoste and gasify and as the steam comprising low-boiling point material and from the tower top of destilling tower
Portion discharges, and the processing water after removing low-boiling point material from stoste is stored in the tower bottom of destilling tower；
The second step, by making the steam comprising low-boiling point material that the top of tower from the destilling tower is discharged carry out hot friendship with water
Change, and make the steam fractional condensation comprising the low-boiling point material so as to be concentrated comprising the steam of the low-boiling point material, and make
The water evaporation is simultaneously discharged as vapor；
The third step, heating is compressed to the vapor discharged from the evaporator, will compress heating after the vapor to
The destilling tower is guided and utilized as the water for heating steam used in destilling tower；And
The fourth step, import by the evaporator segregate after the steam for including low-boiling point material, which is cooled down and
Moisture is removed, thus further concentrates the steam for including low-boiling point material.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2016197083A JP6780188B2 (en) | 2016-10-05 | 2016-10-05 | Low boiling point substance recovery device and recovery method |
| JP2016-197083 | 2016-10-05 |
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| CN107913525A true CN107913525A (en) | 2018-04-17 |
| CN107913525B CN107913525B (en) | 2021-10-22 |
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| JP (1) | JP6780188B2 (en) |
| CN (1) | CN107913525B (en) |
| TW (2) | TWI732870B (en) |
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| CN112870745A (en) * | 2019-11-29 | 2021-06-01 | 笹仓机械工程有限公司 | Device and method for separating foreign substances |
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| CN112499710B (en) * | 2020-10-20 | 2023-01-24 | 阮氏化工（常熟）有限公司 | Device and method for purifying ammonia water by using ammonia-containing wastewater |
| CN113144656B (en) * | 2021-05-13 | 2022-04-22 | 湖南文理学院 | Device and method for extracting crocin from gardenia based on evaporation concentration |
| CN113750556A (en) * | 2021-09-24 | 2021-12-07 | 李媛 | Efficient distillation system and distillation method |
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Also Published As
| Publication number | Publication date |
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| TW202112424A (en) | 2021-04-01 |
| JP6780188B2 (en) | 2020-11-04 |
| TWI732870B (en) | 2021-07-11 |
| TWI758987B (en) | 2022-03-21 |
| CN107913525B (en) | 2021-10-22 |
| TW201813702A (en) | 2018-04-16 |
| JP2018058025A (en) | 2018-04-12 |
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