CN207192815U - A kind of retracting device - Google Patents
A kind of retracting device Download PDFInfo
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- CN207192815U CN207192815U CN201720671855.6U CN201720671855U CN207192815U CN 207192815 U CN207192815 U CN 207192815U CN 201720671855 U CN201720671855 U CN 201720671855U CN 207192815 U CN207192815 U CN 207192815U
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Abstract
The utility model embodiment provides a kind of retracting device, for solving that the ammonium chloride of bulky grain, technical problem not environmentally can not be obtained existing for the method for recovery ammonium chloride in the existing waste liquid from glycine.Wherein described device includes：First flash distillation machine, is used for：First time flash distillation process is carried out to glycine waste liquid, obtains the waste liquid of first time flash distillation process；Wherein, the internal gas pressure subatmospheric of the first flash distillation machine is strong；First centrifuge, the first input end of first centrifuge are connected with the first output end of the described first flash distillation machine, and first centrifuge is used for：Centrifugal treating is carried out to the waste liquid of the first time flash distillation process, obtains Part I ammonium chloride crystals and the waste liquid of first time centrifugal treating.
Description
Technical field
Chemical field is the utility model is related to, more particularly to a kind of retracting device.
Background technology
During glycine is produced, the waste liquid containing a large amount of ammonium chlorides is inevitably produced, is handled at present this
The method of waste liquid is mainly multiple-effect evaporation crystallisation and smoke evaporative method.Multiple-effect evaporation crystallisation is to be used repeatedly to evaporate
Vapor as heat energy, the most of moisture in mother liquor is evaporated at 135 DEG C, obtains concentrated mother liquor, recycles enamel anti-
Answer kettle to stir to concentrated mother liquor to cool, make ammonium chloride crystals, finally isolate chloride solid using centrifuge；Smoke evaporative method
It is to provide heat energy using high-temperature flue gas, the moisture in mother liquor is evaporated in drying tower, is obtained by the discharger of drying tower bottom
To most of chloride solid, partial oxidation ammonium solid is isolated from the vapor above drying tower by gas-solid separator.
But both the above method is required to higher operation temperature to realize the evaporation of moisture, solvent in evaporation process
By rapid evaporation, cause solute degree of super saturation high, and by various strong disturbances, solute ions have little time to arrange in order
Just largely promptly separated out with small crystal grain as big crystal, cause the chloride solid particle of acquisition too small；Meanwhile
Ammonium chloride is extremely easy in decomposition into ammonia and hydrogen chloride under the high temperature conditions, causes ammonium chloride content in the moisture of evaporation higher, pollution
Environment.As can be seen here, in the existing waste liquid from glycine reclaim ammonium chloride device presence can not obtain bulky grain ammonium chloride,
Technical problem not environmentally.
Utility model content
The utility model embodiment provides a kind of retracting device, for solving to reclaim chlorination in the existing waste liquid from glycine
The device presence of ammonium can not obtain the ammonium chloride of bulky grain, technical problem not environmentally.
The utility model embodiment first aspect provides a kind of retracting device, including：
First flash distillation machine, is used for：First time flash distillation process is carried out to glycine waste liquid, obtains the useless of first time flash distillation process
Liquid；Wherein, the internal gas pressure subatmospheric of the first flash distillation machine is strong；
First centrifuge, the first output end phase of the first input end of first centrifuge and the described first flash distillation machine
Even, first centrifuge is used for：Centrifugal treating is carried out to the waste liquid of the first time flash distillation process, obtains Part I chlorination
The waste liquid of crystalline ammonium and first time centrifugal treating.
Said apparatus is separated out from waste liquid ammonium chloride using the mode of flash distillation, and is obtained ammonium chloride by centrifugal treating and consolidated
Body, it is different to be crystallized using high temperature evaporation with device of the prior art, but utilization flash the low characteristic of machine air pressure inside and
The liquid characteristic that boiling point reduces rapidly under low pressure, using flash distillation machine ammonium chloride is separated out from waste liquid at low temperature so that
The ammonium chloride crystals particle of precipitation is larger, improves product quality；Meanwhile the low operating temperature of device further suppress in waste liquid
The decomposition of sodium chloride, reduce the ammonium chloride content in the moisture of evaporation so that the moisture of evaporation can reach discharge standard, more
Add environmental protection；Moreover, the reduction of the operation temperature of device also reduces chlorion in waste liquid and, to the extent of corrosion of equipment, reduced
Equipment cost.
Optionally, the first flash distillation machine is flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine, flash dryer, rotation
Turn any one in flash distillation machine；First centrifuge is sedimentation-type centrifuge or perforated wall centrifuge.
Optionally, described device also includes：Second flash distillation machine, input and the described first centrifugation of the second flash distillation machine
The output end of machine is connected, and the second flash distillation machine is used for：The waste liquid of the first time centrifugal treating is carried out at second of flash distillation
Reason, obtain the waste liquid of second of flash distillation process；Wherein, the second flash distillation machine internal gas pressure subatmospheric is strong；Second
Centrifuge, the input of second centrifuge are connected with the first output end of the described second flash distillation machine, second centrifuge
For：Centrifugal treating is carried out to the waste liquid of second of flash distillation process, passes through the first output of second centrifuge respectively
End and the waste liquid of second the second output end of centrifuge output ammonium chloride residual and second of centrifugal treating.By the manner, use
Second flash distillation machine and the second centrifuge carry out second of flash distillation and centrifugal treating to waste liquid, can be by the useless of first time centrifugal treating
Ammonium chloride in liquid extracts, thus can more ammonium chloride crystals, improve the rate of recovery of ammonium chloride.
Optionally, the second input of first centrifuge is connected with the first output end of second centrifuge, institute
The first centrifuge is stated to be additionally operable to：The ammonium chloride is remained and carries out centrifugal treating, obtains Part II ammonium chloride crystals.Pass through this
Mode, purer ammonium chloride crystals can be obtained, improve the rate of recovery of ammonium chloride；Cause ammonium chloride crystals at this simultaneously
Finally discharged in device at sole outlet, be easy to collect.
Optionally, the second flash distillation machine is flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine, flash dryer, rotation
Turn any one in flash distillation machine；Second centrifuge is any one in sedimentation-type centrifuge, perforated wall centrifuge.It is logical
The manner is crossed, the organic efficiency of ammonium chloride can be improved, while saves equipment cost.
Optionally, the first flash distillation machine is specially flash crystallization tank, and the second flash distillation machine is specially vacuum crystallizer；
Second centrifuge is any one in sedimentation-type centrifuge, perforated wall centrifuge.By the manner, chlorination can be improved
The organic efficiency of ammonium, while save equipment cost.
Optionally, described device also includes：Heater；The heater input connects the output of first centrifuge
End, the input of output end connection the second flash distillation machine of the heater；The heater is used for：To the first time from
The waste liquid of heart processing is heated, and the waste liquid for obtaining heated first time centrifugal treating is output to the second flash distillation machine.Pass through
The manner, second of flash efficiency can be improved, obtain more ammonium chloride crystals, improve the rate of recovery of ammonium chloride.
Optionally, the first flash distillation machine also includes the second output end of the first flash distillation process waste gas of output；Described second
Flash distillation machine also includes the second output end of the second flash distillation process waste gas of output；Described device also includes：Condenser；The condenser
First input end with described first flash distillation machine the second output end be connected, the second input of the condenser and described second
Second output end of flash distillation machine is connected, and the condenser is used for：At the first flash distillation process waste gas and second flash distillation
Reason waste gas carries out cooling treatment and reclaimed.By the manner, using condenser to being discharged in the first flash distillation machine and the second flash distillation machine
Waste gas cooling treatment and reclaim, it is more environmentally-friendly.
The utility model embodiment second aspect provides a kind of recovery method, including：Using the first flash distillation machine, to glycine
Waste liquid carries out first time flash distillation process, obtains the waste liquid of first time flash distillation process；Wherein, the gas inside the first flash distillation machine
Pressure subatmospheric is strong；Using the first centrifuge, centrifugal treating is carried out to the waste liquid of the first time flash distillation process, obtains the
The waste liquid of a part of ammonium chloride crystals and first time centrifugal treating.
Optionally, the waste liquid of the first time flash distillation process is carried out using first centrifuge centrifugal treating it
Afterwards, methods described also includes：Using the second flash distillation machine, the waste liquid of the first time centrifugal treating is carried out at second of flash distillation
Reason, obtain the waste liquid of second of flash distillation process；Wherein, the second flash distillation machine internal gas pressure subatmospheric is strong；Using
Second centrifuge, centrifugal treating is carried out to the waste liquid of second of flash distillation process, obtain Part II ammonium chloride crystals and the
The waste liquid of secondary centrifuging processing.
Optionally, the waste liquid of the first time centrifugal treating is being carried out at second of flash distillation using the described second flash distillation machine
Before reason, methods described also includes：Using heater, the waste liquid of the first time centrifugal treating is heated, obtained through adding
The waste liquid of hot first time centrifugal treating.
Optionally, after flash distillation process is carried out to the glycine waste liquid using the described first flash distillation machine, first is also obtained
Flash distillation process waste gas；After the described second flash distillation machine carries out secondary flash processing to the waste liquid of the first time centrifugal treating, also
Obtain the second flash distillation process waste gas；Methods described also includes：Using condenser, to the first flash distillation process waste gas and described
Two flash distillation process waste gas carry out cooling treatment and reclaimed.
Optionally, the waste liquid of second of flash distillation process is carried out using second centrifuge centrifugal treating it
Afterwards, methods described also includes：Glycine is extracted from the waste liquid of second of centrifugal treating.
The one or more technical schemes provided in the utility model embodiment, at least have the following technical effect that or excellent
Point：
Ammonium chloride is separated out from waste liquid using the mode of flash distillation, and chloride solid is obtained by centrifugal treating, it is different
Crystallized with device of the prior art using high temperature evaporation, but utilize and flash the low characteristic of machine air pressure inside and liquid low
The characteristic that pressure boiling point reduces rapidly, causes ammonium chloride to be separated out at low temperature from waste liquid so that the chlorine of precipitation using flash distillation machine
It is larger to change crystalline ammonium particle, improves product quality；Meanwhile the low operating temperature of device further suppress the sodium chloride in waste liquid
Decompose, reduce the ammonium chloride content in the moisture of evaporation so that the moisture of evaporation can reach discharge standard, more environmentally-friendly；
Moreover, the reduction of the operation temperature of device, which also reduces chlorion in waste liquid, to the extent of corrosion of equipment, reduces equipment
Cost.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly introduced, it should be apparent that, drawings in the following description are only the one of the utility model embodiment
A little embodiments, without having to pay creative labor, can also basis for one of ordinary skill in the art
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the structural representation of retracting device in the utility model embodiment；
Fig. 2 is the structural representation of retracting device in the utility model embodiment；
Fig. 3 is the structural representation of retracting device in the utility model embodiment；
Fig. 4 is the structural representation of retracting device in the utility model embodiment；
Fig. 5 is the flow chart of recovery method in the utility model embodiment；
Fig. 6 is the flow chart of recovery method in the utility model embodiment.
Embodiment
The utility model embodiment technical scheme is described in detail below by accompanying drawing and specific embodiment, should
It is to the detailed of the utility model embodiment technical scheme to understand the specific features in the utility model embodiment and embodiment
Explanation, rather than the restriction to the utility model embodiment technical scheme, in the case where not conflicting, the utility model is implemented
Technical characteristic in example and embodiment can be mutually combined.
Embodiment one
The utility model embodiment one provides a kind of retracting device, for reclaiming ammonium chloride from glycine waste liquid.Reference
Fig. 1, the device include：The first flash distillation centrifuge 12 of machine 11 and first, the first input end of the first centrifuge 12 and the first flash distillation
First output end of machine 11 is connected.Wherein, the first flash distillation machine 11 is used to carry out first time flash distillation process to glycine waste liquid, obtains
The waste liquid of first time flash distillation process, the glycine waste liquid that the first centrifuge 12 is used to obtain the first time flash distillation process are carried out
Centrifugal treating, obtain Part I ammonium chloride crystals and the waste liquid of first time centrifugal treating.
First flash distillation machine 11 can have a variety of implementations, for example, flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine,
Flash dryer, rotary flash distillation machine etc., the utility model embodiment is not particularly limited；First centrifuge 12 can have a variety of realities
Existing mode, such as sedimentation-type centrifuge, perforated wall centrifuge etc., the utility model embodiment is not particularly limited.
The specific handling process of glycine waste liquid in the apparatus is：Waste liquid containing ammonium chloride is imported into the first flash distillation machine
After 11, waste liquid is under the first flash distillation low pressure of machine 11 or vacuum condition, and the air pressure of environment reduces rapidly where waste liquid, for example, from
Atmospheric pressure is reduced to the half of atmospheric pressure, or atmospheric pressure is reduced to vacuum state, and the utility model embodiment is to this
It is not particularly limited.Because air pressure reduces suddenly, cause the most of moisture in waste liquid to be evaporated rapidly, a large amount of chloride solids from
Waste liquid separates out, and forms the ammonium chloride solution i.e. waste liquid of first time flash distillation process of saturation；Then by the useless of first time flash distillation process
Liquid imports the first centrifuge 12 with the first input end of the first centrifuge 12 by the first output end of the first flash distillation machine 11 and carried out
Centrifugal treating so that the solid ammonium chloride in saturated solution separates with liquid, so as to obtain Part I ammonium chloride crystals and
The waste liquid of centrifugal treating.
During specific implementation, if the waste liquid temperature discharged during production glycine is higher, such as waste liquid temperature
Reach 80 DEG C, 90 DEG C, 100 DEG C etc., the waste liquid of high temperature directly can be imported into the first flash distillation machine 11 and be flashed；If waste liquid temperature
Spend it is relatively low, for example, waste liquid temperature be 8 DEG C, 15 DEG C, 25 DEG C etc., be conducted into first again after can waste liquid be heated
Flash distillation machine 11 is flashed, and flash efficiency is improved with this.
Said apparatus is separated out from waste liquid ammonium chloride using the mode of flash distillation, and is obtained ammonium chloride by centrifugal treating and consolidated
Body, it is different to be crystallized using high temperature evaporation with device of the prior art, but utilization flash the low characteristic of machine air pressure inside and
The liquid characteristic that boiling point reduces rapidly under low pressure, using flash distillation machine ammonium chloride is separated out from waste liquid at low temperature so that
The ammonium chloride crystals particle of precipitation is larger, improves product quality；Meanwhile the low operating temperature of device further suppress in waste liquid
The decomposition of sodium chloride, reduce the ammonium chloride content in the moisture of evaporation so that the moisture of evaporation can reach discharge standard, more
Add environmental protection；Moreover, the reduction of the operation temperature of device also reduces chlorion in waste liquid and, to the extent of corrosion of equipment, reduced
The service wear of equipment.
Optionally, reference picture 2, said apparatus can also include：The second flash distillation centrifuge 14 of machine 13 and second, the second flash distillation
The input of machine 13 is connected with the output end of the first centrifuge 12, and the of the input of the second centrifuge 14 and the second flash distillation machine 13
One output end is connected.
After the first centrifuge 12 carries out centrifugal treating to the solution after flash distillation process, from the discharge of the first centrifuge 12
The waste liquid of first time centrifugal treating there is likely to be the ammonium chloride not being precipitated.Therefore device can also include one second sudden strain of a muscle
Steaming machine 13 and second centrifuge 14, the ammonium chloride in residual waste solution for extracting the discharge of the first centrifuge 12.Specifically,
Second flash distillation machine 13, for carrying out second of flash distillation process to the waste liquid of the first time centrifugal treating, obtain second and flash
The waste liquid of processing；Second centrifuge 14, for carrying out centrifugal treating to the waste liquid of second of flash distillation process, obtain ammonium chloride
The waste liquid of residual and second of centrifugal treating, passes through the first output end and the second centrifuge 14 second of the second centrifuge 14 respectively
The waste liquid of output end output ammonium chloride residual and second of centrifugal treating.
In specific implementation process, second flash distillation machine 13 can be flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine,
Flash dryer, rotary flash distillation machine etc., the utility model embodiment is not particularly limited.First flash distillation machine 11 and second flashes machine
13 can be the flash distillation machine of same type, or different types of flash distillation machine, the utility model embodiment do not do specific limit
System.
During specific implementation, the second centrifuge 14 can be sedimentation-type centrifuge, perforated wall centrifuge etc., this practicality
New embodiment is not particularly limited.First centrifuge 12 and the second centrifuge can be identical centrifuge, or different
Centrifuge, the utility model embodiment are not particularly limited.
In specific implementation process, said apparatus except first flash distillation machine 11, the first centrifuge 12, second flash distillation machine 13 with
And second outside centrifuge 14, more flash distillation machines and centrifuge can also be included, for waste liquid is carried out further flash distillation and
Centrifugal treating, to obtain more ammonium chloride crystals, specific implementation is referred to above-mentioned first flash distillation machine 11, first and centrifuged
Machine 12, second flashes the specific implementation of the centrifuge 14 of machine 13 and second, and the utility model embodiment is no longer repeated.
By the manner, second of flash distillation and second are carried out to waste liquid using the second flash distillation centrifuge 14 of machine 13 and second
Centrifugal treating, the ammonium chloride in the waste liquid of first time centrifugal treating can be extracted, therefore can more ammonium chloride knot
Crystalline substance, improve the rate of recovery of ammonium chloride.
Optionally, the first flash distillation machine 11 is specially flash crystallization tank, and the second flash distillation machine 13 is specially vacuum crystallizer.
When being handled due to the first flash distillation machine glycine waste liquid, the moisture in waste liquid is more, it is difficult to extracts more
Ammonium chloride crystals, therefore in specific implementation process, can pay the utmost attention to the first flash distillation machine 11 in the present embodiment is specific
It is arranged to flash crystallization tank.Second flash distillation machine 13 is specifically configured to vacuum crystallizer, flash crystallization tank is first passed through and removes waste liquid
In most of water, then most of ammonium chloride crystals are obtained by vacuum crystallizer.
By the manner, the organic efficiency of ammonium chloride can be improved, while saves equipment cost.
Optionally, reference picture 3, said apparatus can also include：Heater 15.
Due to the waste liquid led into the first time centrifugal treating of the second flash distillation machine 13 be by the first flash distillation machine 11 and first from
Scheming 12 flashes successively, centrifuge after waste liquid, therefore chlorination in leading into the waste liquid of the first time centrifugal treating of the second flash distillation machine 13
Ammonium concentration is lower than ammonium chloride concentration in leading into the glycine waste liquid of the first flash distillation machine 11, while the temperature of waste liquid is being flashed and centrifuged
It is gradually lowered in processing procedure.Therefore, in order to improve second of flash efficiency, the extracted amount of ammonium chloride is improved, the device is also
A heater 15 can be included, the input of heater 15 is connected with the output end of the first centrifuge 12, the output of heater 15
End is connected with the input of the second flash distillation machine 13.Heater 15 heats to the waste liquid of the first time centrifugal treating, obtains
The waste liquid of heated first time centrifugal treating；Second flash distillation machine 13 carries out the to the waste liquid of the heated first time centrifugal treating
Secondary flash processing, obtain the waste liquid of second of flash distillation process.
In specific implementation process, heater 15 can have a variety of implementations, such as electromagnetic heater, infrared heating
Device, resistance heater, asphalt heater etc., the utility model embodiment is not particularly limited.
By the manner, the waste liquid of first time centrifugal treating is heated using heater 15, can be improved
Secondary flash efficiency, more ammonium chloride crystals are obtained, improve the rate of recovery of ammonium chloride.
Optionally, reference picture 2 to Fig. 4, described device also includes：Condenser 16.
The first flash distillation machine 11 also obtains the first flash distillation after first time flash distillation process is carried out to the glycine waste liquid
Waste gas is handled, the second flash distillation machine 13 also obtains after secondary flash processing is carried out to the waste liquid of the first time centrifugal treating
Obtain the second flash distillation process waste gas.It is vapor that exhaust gas constituents are most of, can be recycled, the condenser 16, for institute
State the first flash distillation process waste gas and the second flash distillation process waste gas carries out cooling treatment and reclaimed.
In specific implementation process, condenser 16 can have a variety of implementations, such as steam condenser, flue gas condenser
Deng the utility model embodiment is not particularly limited.
By the manner, the waste gas discharged in first flash distillation machine 11 and the second flash distillation machine 13 is carried out using condenser 16 cold
But handle and reclaim, it is more environmentally-friendly.
Optionally, after the second centrifuge 14 carries out centrifugal treating to the waste liquid of second of flash distillation process, the ammonium chloride of acquisition
The liquid remained on a small quantity is likely present in solid, forms the ammonium chloride residual for including Part II ammonium chloride crystals.Reference picture
4, the second input of first centrifuge 12 is connected with the first output end of second centrifuge 14, first centrifugation
Machine 12 is additionally operable to：The ammonium chloride is remained and carries out centrifugal treating, obtains Part II ammonium chloride crystals.
In order to obtain purer ammonium chloride, the rate of recovery of ammonium chloride is improved, and facilitates the recovery of ammonium chloride, upper
After the second centrifuge 14 is stated to waste liquid progress centrifugal treating, Part II chlorination can be included by what is discharged in the second centrifuge 14
The ammonium chloride residual of crystalline ammonium imports the first centrifuge 12 and carries out centrifugal treating again, obtains the Part II ammonium chloride knot
Crystalline substance, and finally discharged by the first centrifuge 12.Such as shown in Fig. 3, solid line with the arrow represents that the second centrifuge 14 is discharged in figure
The mixed chlorinated ammonium salt solution of solid-liquid be imported into the first centrifuge 12.
By the manner, using the first centrifuge 12 and the second centrifuge 14 to including the chlorine of Part II ammonium chloride crystals
Change ammonium residual and carry out multiplicating centrifugation, purer ammonium chloride crystals can be obtained, improve the rate of recovery of ammonium chloride；Together
When cause ammonium chloride crystals in the apparatus finally at sole outlet discharge, be easy to collect.
It should be noted that in the utility model embodiment, " input " and " output end " is intended merely to conveniently describe
The address that each device annexation is taken in the utility model embodiment device, during specific implementation, " input " and
" output end " can also have other forms address, such as " input " is also referred to as " entrance " or " feeding port ", " output
End " is also referred to as " exporting " or " discharging opening ", and the utility model embodiment is not particularly limited.
Embodiment two
The utility model embodiment two is the method reclaimed using the device described in embodiment one to glycine waste liquid,
Reference picture 5, methods described includes：
Step 21：Using the first flash distillation machine, first time flash distillation process is carried out to glycine waste liquid, obtained at first time flash distillation
The waste liquid of reason；Wherein, gas pressure intensity subatmospheric when first time flash distillation process is carried out to the glycine waste liquid is strong.
In the utility model embodiment, the first flash distillation machine 11 can be used to carry out first time flash distillation process to waste liquid.Specifically
, the waste liquid containing ammonium chloride is imported into the first flash distillation machine 11, waste liquid is under low pressure or vacuum condition, because pressure drops suddenly
It is low, cause the most of moisture in waste liquid to be evaporated rapidly, a large amount of chloride solids separate out from waste liquid, form the ammonium chloride of saturation
Solution.Wherein, the first flash distillation machine 11 can be flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine, flash dryer, rotation
Flash distillation machine etc., the utility model embodiment is not particularly limited.
During specific implementation, if the glycine waste liquid temperature discharged during production glycine is higher, for example, it is useless
Liquid temperature degree reaches 99 DEG C, 105 DEG C, 110 DEG C etc., the waste liquid of high temperature directly can be imported into flash distillation machine and be flashed；If sweet ammonia
Acid waste liquid temperature is relatively low, for example, waste liquid temperature is 8 DEG C, 15 DEG C, 25 DEG C etc., again by it after can waste liquid be heated
The flash distillation of flash distillation machine is imported, flash efficiency is improved with this.For example, 8 DEG C of glycine waste liquid is heated to 110 DEG C.
Step 22：Using the first centrifuge, centrifugal treating is carried out to the waste liquid of the first time flash distillation process, obtains first
The waste liquid of partial oxidation crystalline ammonium and first time centrifugal treating.
Specifically, the waste liquid for first being flashed the first time flash distillation process in machine 11 after flash distillation process imports the first centrifugation
Machine 12 carries out centrifugal treating so that the solid ammonium chloride in saturated solution separates with liquid, so as to obtain Part I ammonium chloride
Crystallization and the waste liquid of first time centrifugal treating.
Wherein, the first centrifuge 12 can be sedimentation-type centrifuge, perforated wall centrifuge etc., and the utility model embodiment is not
Do concrete restriction.
In such scheme, ammonium chloride is separated out from waste liquid by the way of flash distillation, and chlorine is obtained by centrifugal treating
Change ammonium solid, different with using high temperature evaporation crystallization mode in the prior art, boiling point is rapid under low pressure using liquid for this programme
The characteristic of reduction so that ammonium chloride separates out from waste liquid at low temperature, and the ammonium chloride crystals particle obtained with this is bigger, improves
Product quality；Meanwhile the reduction of operation temperature further suppress the decomposition of the sodium chloride in waste liquid, in the moisture for reducing evaporation
Ammonium chloride content so that the moisture of evaporation can reach discharge standard, thus this programme is more environmentally-friendly；Also, operation temperature
Reduction also reduces corrosion of the chlorion to equipment in waste liquid liquid, reduces equipment cost.
Optionally, it is remaining after the above-mentioned solution to after flash distillation process carries out centrifugal treating acquisition ammonia chloride crystal
The ammonium chloride of dissolving is there is likely to be in waste liquid, therefore, step 23 and step 24 are can also carry out after step 12 is performed, from
Ammonium chloride is extracted in remaining waste liquid：
Step 23, second of flash distillation process is carried out to the waste liquid of the first time centrifugal treating, obtained at second of flash distillation
The waste liquid of reason；Gas pressure intensity when wherein, to waste liquid second of flash distillation process of progress of the first time centrifugal treating is less than big
Air pressure is strong.
Second of flash distillation process is carried out to waste liquid using the second flash distillation machine 13, it is similar with the method for above-mentioned steps 21, flash
To the ammonium chloride solution of saturation.Embodiment is referred to step 21, is no longer repeated herein.
Wherein, the equipment for realizing second of flash distillation and the equipment for realizing flash distillation for the first time can be the flash distillation of same type
Machine, or different types of flash distillation machine, the utility model embodiment are not particularly limited.
During specific implementation, when being flashed due to first time, the moisture in waste liquid is more, it is difficult to extracts more chlorine
Change crystalline ammonium, therefore, can pay the utmost attention to realize that the first flash distillation machine 11 of flash distillation for the first time is specifically configured in the present embodiment
Flash crystallization tank, the second flash distillation machine 12 for realizing second of flash distillation is specifically configured to vacuum crystallizer, first passes through flash crystallization
Tank removes most of water in waste liquid, then obtains most of ammonium chloride crystals by vacuum crystallizer, improves chlorine propylhomoserin with this and returns
Produce effects rate, while save equipment cost.
Step 24, centrifugal treating is carried out to the waste liquid of second of flash distillation process, obtains Part II ammonium chloride crystals
And the waste liquid of second of centrifugal treating.
The waste liquid that saturated solution after second of flash distillation process is second of flash distillation process is imported into the second centrifuge 14 to enter
Row centrifugal treating, it is similar with above-mentioned steps 21 so that the solid ammonium chloride in saturated solution separates with solution, obtains Part II
Ammonium chloride crystals.Embodiment is referred to step 21, is no longer repeated herein.
Wherein, realizing the second centrifuge 14 of second of centrifugation can be with the first centrifuge 12 for realizing centrifugation for the first time
The centrifuge of same type, or different types of flash distillation machine, the utility model embodiment are not particularly limited.
By the manner, second of flash distillation and centrifugal treating are carried out to waste liquid, can will be after flash centrifugal treating remain
Ammonium chloride in waste liquid extracts, and can obtain more ammonium chloride crystals, improves the rate of recovery of ammonium chloride.
Optionally, due to the waste liquid for carrying out the first time centrifugal treating before second of flash distillation process be by full flashing and
Waste liquid after centrifugal treating, the waste liquid before the concentration of ammonium chloride flashes compared to first time in waste liquid is low, while the temperature of waste liquid
Also gradually reduced in first time flash distillation and centrifugal process.Therefore, in order to improve second of flash efficiency, step 23 institute is being performed
Before that states carries out secondary flash processing to the waste liquid after centrifugal treating, methods described can also include：
Step 25, the waste liquid of the first time centrifugal treating is heated, obtains heated first time centrifugal treating
Waste liquid.
Specifically, being heated using heater 15 to the waste liquid of the first time centrifugal treating, heated first is obtained
The waste liquid of secondary centrifugal treating, and the waste liquid of heated first time centrifugal treating is imported into the second flash distillation machine 13, obtain described second
The waste liquid of secondary flash distillation process.
By the manner, second of flash efficiency can be improved, more ammonium chloride crystals can be obtained, improve chlorination
The rate of recovery of ammonium.
Optionally, in order to obtain purer ammonium chloride crystals, in above-mentioned steps 22 and step 24 to waste liquid from
Heart processing can be multiple centrifugal treating.It is for instance possible to use multiple centrifuges successively continuously carry out centrifugal treating to waste liquid,
Multiplicating centrifugal treating can also be carried out to waste liquid in same centrifuge, the utility model embodiment is not particularly limited.
By the manner, purer ammonium chloride crystals can be obtained.
Optionally, in step 21 and step 23 flash process, after flash distillation process is carried out to the glycine waste liquid, also
Obtain the first flash distillation process waste gas；After secondary flash processing is carried out to the waste liquid of the first time centrifugal treating, the is also obtained
Two flash distillation process waste gas.It is vapor that wherein the composition of the first flash distillation process waste gas and the second flash distillation process waste gas is most of, can
To recycle, methods described also includes：
Step 26, cooling treatment is carried out to the first flash distillation process waste gas and the second flash distillation process waste gas and reclaimed.
Specifically, the waste gas in flash distillation machine can be led into condenser 16 so that vapor liquefies at low temperature, forms liquid
State water, is reclaimed.
, can be more environmentally-friendly with the moisture in Recycling of waste liquid by the manner.
Optionally, the waste liquid of second of centrifugal treating is obtained after above-mentioned steps 22 or 24 pairs of waste liquids carry out centrifugal treating
In, it is also possible to glycine residual be present, in order to improve resource utilization, after above-mentioned steps 24, methods described also includes：
Step 27：Glycine is extracted from the waste liquid of second of centrifugal treating.
The method of extraction glycine is referred to the scheme of extraction glycine of the prior art, the utility model embodiment
No longer it is described in detail.
By the manner, the glycine of residual can be extracted from glycine waste liquid, improves resource utilization.
It should be noted that in specific implementation process, after step 24 carries out second of centrifugal treating to waste liquid, also
The waste liquid of second of centrifugal treating of acquisition can be flashed again, centrifugal treating, concrete methods of realizing can refer to step
23 and step 24, no longer it is described in detail herein.The number that the utility model embodiment is flashed and centrifuged to waste liquid is not done
Concrete restriction.
Embodiment three
In order that the scheme that the utility model embodiment is provided, this practicality can be fully understood by obtaining those skilled in the art
New embodiment three includes description the utility model embodiment the one of which concrete methods of realizing of method.
The device realized in the utility model embodiment three and ammonium chloride method is reclaimed from glycine waste liquid, ginseng are introduced first
According to shown in Fig. 3, the device of processing glycine waste liquid specifically includes：First flash distillation machine 11, the first centrifuge 12, heater 15, the
Two flash distillation machines 13, the second centrifuge 14 and condenser 16.Reference picture 6, this method mainly includes the following steps that：
Step 31, first time flash distillation process is carried out to glycine waste liquid using the first flash distillation machine 11, obtains and flash for the first time
The waste liquid and first time flash distillation process waste gas of processing.
Specifically, glycine is produced to the high temperature glycine waste liquid discharged in producing line is introduced directly into the first flash distillation machine 11,
Flashed under low pressure or vacuum condition.
Step 32, centrifugal treating is carried out to the waste liquid of the first time flash distillation process using the first centrifuge 12, obtains the
The waste liquid of a part of ammonium chloride crystals and first time centrifugal treating.
Carried out specifically, the waste liquid in the first flash distillation machine 11 after flash distillation process is imported into the first centrifuge 12 at centrifugation
Reason, obtains Part I ammonium chloride crystals and the waste liquid of first time centrifugal treating.
Step 33, cooling treatment is carried out to the first time flash distillation process waste gas using condenser 16 and reclaimed.
Cooled down specifically, the vapor that the first centrifuge 12 is discharged is imported into condenser 16, form aqueous water, and it is right
The part water is reclaimed.
Step 34, the waste liquid of the first time centrifugal treating is heated using heater 15.
Specifically, after the waste liquid that the first centrifuge 12 discharges the first flash distillation machine 11 carries out separation of solid and liquid, will isolate
Raffinate import heater 15 heated, for example, raffinate can be heated to 60~70 DEG C.The utility model embodiment
Mode of heating and degree of heat are not particularly limited.
Step 35, second is carried out to the waste liquid of the first time centrifugal treating after heating using the second flash distillation machine 13 to dodge
Steaming is handled, and obtains the waste liquid and second of flash distillation process waste gas of second of flash distillation process.
Specifically, after the heating of raffinate that heater 15 is discharged to the first centrifuge 12, the raffinate of high temperature is imported the
Two flash distillation machines 13 carry out second of flash distillation process, and raffinate evaporated again in the vacuum environment of the second flash distillation machine 13, obtain the
The waste liquid of secondary flash processing.
Step 36, centrifugal treating is carried out to the waste liquid of second of flash distillation process using the second centrifuge 14, obtains the
Two partial oxidation crystalline ammoniums.
The waste liquid for second of flash distillation process that second flash distillation machine 13 is discharged imports the second centrifuge 14 and carries out centrifugal treating,
Obtain Part II ammonium chloride crystals and the waste liquid of second of centrifugal treating.
Step 37, cooling treatment is carried out to second of flash distillation process waste gas using condenser 33 and reclaimed.
Cooled down specifically, the vapor that vacuum crystallizer 35 is discharged is imported into condenser 33, form aqueous water, and it is right
The part water is reclaimed.
During specific implementation, first flash distillation machine 11 can be flash crystallization tank, vacuum crystallizer, multistage flash evaporation machine,
Flash dryer, rotary flash distillation machine etc., the utility model embodiment is not particularly limited；Second flash distillation machine 13 can be flash distillation knot
Brilliant tank, vacuum crystallizer, multistage flash evaporation machine, flash dryer, rotary flash distillation machine etc., the utility model embodiment does not do specific limit
System.
When being handled due to the first flash distillation machine glycine waste liquid, the moisture in waste liquid is more, it is difficult to extracts more
Ammonium chloride crystals, therefore can pay the utmost attention to the first flash distillation machine 11 in the present embodiment being specifically configured to flash crystallization tank,
Second flash distillation machine 13 is specifically configured to vacuum crystallizer.Most of water in flash crystallization tank removal waste liquid is first passed through, then is led to
Cross vacuum crystallizer and obtain most of ammonium chloride crystals, equipment cost is saved with this, while improve the rate of recovery of ammonium chloride.
In such scheme, ammonium chloride is separated out from waste liquid by the way of flash distillation, and chlorine is obtained by centrifugal treating
Change ammonium solid, different with using high temperature evaporation crystallization mode in the prior art, boiling point is rapid under low pressure using liquid for this programme
The characteristic of reduction so that ammonium chloride separates out from waste liquid at low temperature, and the ammonium chloride crystals particle obtained with this is bigger, improves
Product quality；Meanwhile the reduction of operation temperature further suppress the decomposition of the sodium chloride in waste liquid, in the moisture for reducing evaporation
Ammonium chloride content so that the moisture of evaporation can reach discharge standard, thus this programme is more environmentally-friendly；Also, operation temperature
Reduction also reduces corrosion of the chlorion to equipment in waste liquid liquid, reduces equipment cost.
The one or more technical schemes provided in the utility model embodiment, at least have the following technical effect that or excellent
Point：
Ammonium chloride is separated out from waste liquid by the way of flash distillation, and chloride solid is obtained by centrifugal treating, it is different
Crystallized with device of the prior art using high temperature evaporation, but utilize and flash the low characteristic of machine air pressure inside and liquid low
The characteristic that pressure boiling point reduces rapidly, causes ammonium chloride to be separated out at low temperature from waste liquid so that the chlorine of precipitation using flash distillation machine
It is larger to change crystalline ammonium particle, improves product quality；Meanwhile the low operating temperature of device further suppress the sodium chloride in waste liquid
Decompose, reduce the ammonium chloride content in the moisture of evaporation so that the moisture of evaporation can reach discharge standard, more environmentally-friendly；
Moreover, the reduction of the operation temperature of device, which also reduces chlorion in waste liquid, to the extent of corrosion of equipment, reduces equipment
Cost.
Obviously, those skilled in the art can to the utility model embodiment carry out it is various change and modification without departing from
The spirit and scope of the utility model embodiment.So, if these modifications and variations of the utility model embodiment belong to this
Within the scope of utility model embodiment claim and its equivalent technologies, then the utility model embodiment is also intended to include these
Including change and modification.
Claims (8)
- A kind of 1. retracting device, it is characterised in that including：First flash distillation machine, is used for：First time flash distillation process is carried out to glycine waste liquid, obtains the waste liquid of first time flash distillation process； Wherein, the internal gas pressure subatmospheric of the first flash distillation machine is strong；First centrifuge, the first input end of first centrifuge are connected with the first output end of the described first flash distillation machine, institute The first centrifuge is stated to be used for：Centrifugal treating is carried out to the waste liquid of the first time flash distillation process, obtains Part I ammonium chloride knot Brilliant and first time centrifugal treating waste liquid.
- 2. device as claimed in claim 1, it is characterised in that it is described first flash distillation machine be flash crystallization tank, vacuum crystallizer, Any one in multistage flash evaporation machine, flash dryer, rotary flash distillation machine；First centrifuge is sedimentation-type centrifuge or perforated wall centrifuge.
- 3. device as claimed in claim 1, it is characterised in that described device also includes：Second flash distillation machine, the input of the second flash distillation machine are connected with the output end of first centrifuge, and described second dodges Steaming machine is used for：Second of flash distillation process is carried out to the waste liquid of the first time centrifugal treating, second of flash distillation process of acquisition is given up Liquid；Wherein, the second flash distillation machine internal gas pressure subatmospheric is strong；Second centrifuge, the input of second centrifuge are connected with the first output end of the described second flash distillation machine, and described the Two centrifuges are used for：Centrifugal treating is carried out to the waste liquid of second of flash distillation process, passes through second centrifuge respectively First output end and the waste liquid of second the second output end of centrifuge output ammonium chloride residual and second of centrifugal treating.
- 4. device as claimed in claim 3, it is characterised in that the second input of first centrifuge with described second from First output end of scheming is connected, and first centrifuge is additionally operable to：The ammonium chloride is remained and carries out centrifugal treating, obtains the Two partial oxidation crystalline ammoniums.
- 5. the device as described in claim 3 or 4, it is characterised in that the second flash distillation machine is flash crystallization tank, vacuum crystallization Any one in device, multistage flash evaporation machine, flash dryer, rotary flash distillation machine；Second centrifuge is any one in sedimentation-type centrifuge, perforated wall centrifuge.
- 6. the device as described in claim 3 or 4, it is characterised in that the first flash distillation machine is specially flash crystallization tank, described Second flash distillation machine is specially vacuum crystallizer；Second centrifuge is any one in sedimentation-type centrifuge, perforated wall centrifuge.
- 7. the device as described in claim 3 or 4, it is characterised in that described device also includes：Heater；The heater input connects the output end of first centrifuge, the output end connection described second of the heater The input of flash distillation machine；The heater is used for：The waste liquid of the first time centrifugal treating is heated, obtained at heated first time centrifugation The waste liquid of reason is output to the second flash distillation machine.
- 8. the device as described in claim 3 or 4, it is characterised in that the first flash distillation machine is also included at the first flash distillation of output Manage the second output end of waste gas；The second flash distillation machine also includes the second output end of the second flash distillation process waste gas of output；It is described Device also includes：Condenser；The first input end of the condenser is connected with the second output end of the described first flash distillation machine, and the second of the condenser is defeated The second output end for entering end with the described second flash distillation machine is connected, and the condenser is used for：To the first flash distillation process waste gas and The second flash distillation process waste gas carries out cooling treatment and reclaimed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671855.6U CN207192815U (en) | 2017-06-09 | 2017-06-09 | A kind of retracting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671855.6U CN207192815U (en) | 2017-06-09 | 2017-06-09 | A kind of retracting device |
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| CN207192815U true CN207192815U (en) | 2018-04-06 |
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| CN201720671855.6U Active CN207192815U (en) | 2017-06-09 | 2017-06-09 | A kind of retracting device |
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| CN (1) | CN207192815U (en) |
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2017
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