CN109173328A - Crystallize the air-cooling apparatus and its cooling means of ammonium chloride solution - Google Patents
Crystallize the air-cooling apparatus and its cooling means of ammonium chloride solution Download PDFInfo
- Publication number
- CN109173328A CN109173328A CN201811184816.9A CN201811184816A CN109173328A CN 109173328 A CN109173328 A CN 109173328A CN 201811184816 A CN201811184816 A CN 201811184816A CN 109173328 A CN109173328 A CN 109173328A
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- China
- Prior art keywords
- ammonium chloride
- chloride solution
- air
- crystallizer
- settling tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D2009/0086—Processes or apparatus therefor
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of air-cooling apparatuses for crystallizing ammonium chloride solution, including settling tank, crystallizer and circulating pump, air outlet is provided at the top of the crystallizer, blower is provided at the air outlet, spray equipment is provided in the crystallizer, there are gap between one end of the spray equipment and the crystallizer, the other end is pierced by the crystallizer and connect with the circulating line.The invention further relates to a kind of cooling means for crystallizing ammonium chloride solution.The air-cooling apparatus of crystallization ammonium chloride solution of the invention is directly exchanged heat using air, eliminates heat exchanger, reduces a possibility that equipment is stifled, and guarantee production stablizes and do not need steam and refrigerant, reduces operating cost；The air cooling method of crystallization ammonium chloride solution of the invention is easy to operate, simple and direct and consume energy that low, production capacity is high, can not only reduce cost of labor, but also can reduce cost of investment.
Description
Technical field
The invention belongs to industrial production cooling fields, and in particular to it is a kind of crystallize ammonium chloride solution air-cooling apparatus and
Its cooling means.
Background technique
In Chemical Manufacture, the crystallization of ammonium chloride saturated solution mainly uses following methods:
1, jacketed crystallization kettle cooling crystallization, refrigerant enter crystallization kettle collet, exchange heat with material in kettle, reach drop
The purpose of temperature crystallization, industrial crystallization kettle used are substantially enamel stirred tank, and this method is since heat transfer coefficient is low, heat-transfer surface
Product is limited, therefore production capacity is smaller, while needing more cost of labor.
2, shell-and-tube heat exchanger decrease temperature crystalline, refrigerant are recycled in tube side by heat exchanger shell pass, material by circulating pump,
Decrease temperature crystalline, a large amount of refrigerant of this method needs, while heat exchanger clogging frequent occurrence are carried out with this, is seriously affected normal
Production.3, vacuum flashing crystallizes, and is in negative pressure in crystallizing tank by high steam jet pump, material flashes moisture, reaches temperature
It reduces, the process of material crystallization, this method energy consumption is high, needs a large amount of steam and refrigerant.
4, evaporative crystallization is evaporated material by steam, reaches material concentration and increases, and the process that crystal is precipitated should
Method needs a large amount of steam, is inconvenient.
Currently, the crystallization technique of ammonium chloride saturated solution is most important in Chemical Manufacture, but the prior art there are still
Many defects, therefore, it is necessary to develop a kind of air-cooling apparatus and its cooling means for crystallizing ammonium chloride solution.
Summary of the invention
The problems such as production capacity to solve existing such crystallization apparatus is small, energy consumption is high, equipment is stifled, cost of investment is high, it is of the invention
A kind of air-cooling apparatus for crystallizing ammonium chloride solution is provided, including settling tank, crystallizer and circulating pump, the crystallizer are set
It sets in the top of the settling tank, the circulating pump is connect by circulating line with the settling tank and the crystallizer, wherein
It is provided with air outlet at the top of the crystallizer, blower is provided at the air outlet, spray dress is provided in the crystallizer
It sets, there are gap between one end of the spray equipment and the crystallizer, the other end is pierced by the crystallizer and follows with described
The connection of endless tube road.
Preferably, demister is provided between the blower and the spray equipment.
In any of the above-described scheme preferably, the crystallizer is the tube structure of cylindrical body, the tube structure
Barrel diameter is 3800mm, is highly 12000mm.Gap between one end and crystallizer of spray equipment is barrel diameter
0.15-0.2 times, the setting in gap can make the ammonium chloride solution for flowing into spray equipment by circulating line be buffered and be sunk
Drop allows ammonium chloride solution more smooth when the spout for entering spray equipment is sprayed and eliminates circulating line
Interior air.
In any of the above-described scheme preferably, discharge port, the discharging are provided on the side of the settling tank lower end
Mouth is circumscribed with discharge pipe, is provided with discharging pump on the discharge pipe.
In any of the above-described scheme preferably, partition is provided in the settling tank.
In any of the above-described scheme preferably, feed inlet is provided on the circulating line.
In any of the above-described scheme preferably, air inlet is provided on the side wall of the crystallizer lower end.
The present invention also provides a kind of air cooling methods for crystallizing ammonium chloride solution, include following step according to sequencing
It is rapid:
Step (1): it will be added by the ammonium chloride solution after triple effect evaporation by the feed inlet of circulating line, pass through circulation
The effect of pump, ammonium chloride solution enters the spray equipment in crystallizer, then is sprayed ammonium chloride solution downwards by spray equipment；
Step (2): ammonium chloride solution drops downward into settling tank by spray equipment, and cold air is by blower air inducing, by tying
Air inlet in brilliant device lower end side enters in crystallizer, and upwards with ammonium chloride solution counterflow heat exchange, the air after heating is by tying
By being discharged into atmosphere after demister at the top of brilliant device, the ammonium chloride solution after decrease temperature crystalline falls into settling tank and is settled；
Step (3): the chloride solid after crystallization is precipitated to form magma in the bottom of settling tank, and ammonium chloride magma is by going out
Material pump is discharged from discharge port to be collected, and the clear liquid of undecomposed ammonium chloride then flows into the other side of settling tank partition, then leads to
It crosses the spray equipment that the clear liquid of ammonium chloride is delivered in crystallizer by circulating pump again and carries out cooling cycle.
Preferably, the method has used the air-cooling apparatus of any of the above-described crystallization ammonium chloride solution.
The invention has the benefit that
The air-cooling apparatus of crystallization ammonium chloride solution provided by the invention is directly exchanged heat using air, eliminates heat exchange
Device reduces a possibility that equipment is stifled, and guarantee production stablizes and do not need steam and refrigerant, reduces operating cost；In addition,
The air cooling method of crystallization ammonium chloride solution provided by the invention is easy to operate, the simple and direct and low yield energy that consumes energy is high, not only may be used
To reduce cost of labor, and cost of investment can be reduced.
Detailed description of the invention
Fig. 1 is a preferred embodiment structural representation of the air-cooling apparatus of crystallization ammonium chloride solution according to the invention
Figure.
Explanation: 1- blower is marked in figure；2- circulating pump；21- circulating line；211- feed inlet；3- settling tank；4- discharging
Pump；41- discharge pipe；5- crystallizer；6- spray equipment；7- demister.
Specific embodiment
In order to be further understood that summary of the invention of the invention, the present invention is elaborated below in conjunction with specific embodiment.
Embodiment one:
As shown in Figure 1, an embodiment of the air-cooling apparatus of crystallization ammonium chloride solution according to the invention, including sedimentation
The top of settling tank 3 is arranged in pond 3, crystallizer 5 and circulating pump 2, crystallizer 5, and 3 upper end of settling tank is provided with opening, crystallizer 5
The opening of 3 upper end of opening and settling tank of lower end forms access, for settling ammonium chloride, blower 1 is provided in crystallizer 5, is removed
Foam device 7 and spray equipment 6, wherein blower 1 is set to the top of crystallizer 5, blower 1 can to the external exhaust gas of crystallizer 5,
Heat exchange is carried out to the ammonium chloride solution in crystallizer 5, to carry out cooling crystallization to ammonium chloride solution, spray equipment 6 is arranged
In the top position in 5 middle part of crystallizer, for spraying ammonium chloride solution, demister 7 is arranged between blower 1 and spray equipment 6,
For reducing the content of ammonium chloride solution in discharge gas, it is maintained at ammonium chloride solution in crystallizer 5.Circulating pump 2 leads to respectively
It crosses circulating line 21 to connect with the spray equipment 6 of the upper end of settling tank 3 and crystallizer 5, close to spray equipment 6 on circulating line 21
Position be provided with feed inlet 211, ammonium chloride solution can be added by feed inlet 211, circulating pump 2 can will be in settling tank 3
Ammonium chloride clear liquid be transported in the spray equipment 6 in crystallizer 5 by circulating line 21.3 lower end of settling tank is provided with discharging
Mouthful, discharge port is arranged on the side wall on 21 opposite of circulating line, and discharge port is circumscribed with discharge pipe 41, discharge pipe 41 and discharging
4 connection of pump, discharging pump 4 can extract the ammonium chloride magma of 3 bottom of settling tank out out of discharge pipe 41, setting in settling tank 3
There is partition, partition can separate ammonium chloride magma and ammonium chloride clear liquid.
When the present embodiment works, by by about 65 DEG C of temperature after triple effect evaporation of ammonium chloride solution with 15m3/ h flow velocity passes through
The feed inlet of circulating line 21 is added, and by the effect of circulating pump 2, ammonium chloride solution enters the spray equipment 6 in crystallizer 5,
Ammonium chloride solution is sprayed downwards by spray equipment 6 again；Ammonium chloride solution drops downward into settling tank 3, and cold air passes through
Air inlet in 5 bottom side of the wall of crystallizer enters in crystallizer 5, then by 1 air inducing of blower, makes cold air under crystallizer 5
End upwards cools down ammonium chloride solution with ammonium chloride solution counterflow heat exchange, and the air after heating is removed by passing through at the top of crystallizer
Atmosphere is discharged into after foam device 7, the ammonium chloride solution after decrease temperature crystalline falls into settling tank and settled；Ammonium chloride after crystallization is settling
The bottom in pond 3 is precipitated to form magma, and ammonium chloride magma is discharged through discharge pipe 41 from discharge port by discharging pump 4 and is collected, and not
The clear liquid of the ammonium chloride of precipitation then flows into the other side of 3 partition of settling tank, then by circulating pump 2 that the clear liquid of ammonium chloride is defeated again
It send to the spray equipment 6 in crystallizer 5 and carries out cooling cycle.
Embodiment two:
The present embodiment is basically the same as the first embodiment, and is only illustrated below with regard to difference.
It is provided with pressurized canister at feed inlet 211, is provided with atomizer at spray equipment 6, pressurized canister can be from charging
Mouth 211 first pressurizes to solution when ammonium chloride solution is added, and is delivered to spray equipment by circulating pump 2 again after pressurization
6, ammonium chloride solution is atomized by the atomizer being arranged on spray equipment 6 to be sprayed still further below.
After ammonium chloride solution is pressurized by pressurized canister, boiling point can be increased, and thermal content can also increase, after pressurization,
By the pressure difference of pressurized canister and circulating line 21, ammonium chloride solution is transported to spray equipment 6, and due to pressure reduction, part is aobvious
Heat releases, this part excess heat will be absorbed in the form of latent heat, causes part water by " flash distillation " at steam, to chlorination
Ammonium salt solution is concentrated, and is atomized the ammonium chloride solution of concentration by atomizer in spray equipment 6 and sprays downwards, by
Ammonium chloride solution particle in Wuhua is smaller, it is possible to promote the crystallisation by cooling efficiency of ammonium chloride solution.
The experimental result of embodiment two is as follows:
Table 1 is the present embodiment and the cooling energy consumption comparison of the prior art
As shown in Table 1, the present embodiment is compared with the highest vacuum flashing method for crystallising of efficiency in the prior art, crystalline rate
It is essentially identical, but consume energy and be far smaller than this method, it is directly exchanged heat using air, eliminates heat exchanger, what reduction equipment was blocked up can
Energy property, guarantee production stablizes and does not need steam and refrigerant, reduces operating cost.
In addition, the ammonia chloride crystal that method through this embodiment obtains is not only uniform in size, based on tiny crystallization,
And without caking phenomenon.
It will be apparent to those skilled in the art that air-cooling apparatus and its cooling side of crystallization ammonium chloride solution of the invention
Method include aforementioned present invention specification summary of the invention and specific embodiment part and attached drawing shown by each section appoint
Meaning combination describes one by one as space is limited and for each scheme for keeping specification concise without constituting these combinations.It is all in this hair
Within bright spirit and principle, any modification, equivalent substitution, improvement and etc. done should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of air-cooling apparatus for crystallizing ammonium chloride solution, including settling tank, crystallizer and circulating pump, the crystallizer are set
It sets in the top of the settling tank, the circulating pump is connect by circulating line with the settling tank and the crystallizer, special
Sign is, air outlet is provided at the top of the crystallizer, and blower is provided at the air outlet, and the inside of the crystallizer is set
It is equipped with spray equipment, there are gap between one end of the spray equipment and the crystallizer, the other end is pierced by the crystallizer
And it is connect with the circulating line.
2. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that the blower and institute
It states and is provided with demister between spray equipment.
3. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that the crystallizer is
The diameter of cylindrical structure, the cylindrical body is 3800mm, is highly 12000mm.
4. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that under the settling tank
Discharge port is provided on the side at end, the discharge port is circumscribed with discharge pipe, is provided with discharging pump on the discharge pipe.
5. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that in the settling tank
It is provided with partition.
6. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that the circulating line
On be provided with feed inlet.
7. the air-cooling apparatus of crystallization ammonium chloride solution according to claim 1, which is characterized in that under the crystallizer
Air inlet is provided on the side wall at end.
8. it is a kind of crystallize ammonium chloride solution air cooling method, according to sequencing the following steps are included:
Step (1): it will be added by the ammonium chloride solution after triple effect evaporation by the feed inlet of circulating line, pass through circulating pump
Effect, ammonium chloride solution enters the spray equipment in crystallizer, then is sprayed ammonium chloride solution downwards by spray equipment；
Step (2): ammonium chloride solution drops downward into settling tank by spray equipment, and cold air is by blower air inducing, by crystallizer
Air inlet in lower end side enters in crystallizer, and upwards with ammonium chloride solution counterflow heat exchange, the air after heating is by crystallizer
Top is discharged into atmosphere after passing through demister, and the ammonium chloride solution after decrease temperature crystalline falls into settling tank and settled；
Step (3): the chloride solid after crystallization is precipitated to form magma in the bottom of settling tank, and ammonium chloride magma passes through discharging pump
It is discharged and collects from discharge port, and the clear liquid of undecomposed ammonium chloride then flows into the other side of settling tank partition, then by following
The clear liquid of ammonium chloride is delivered to the spray equipment in crystallizer again and carries out cooling cycle by ring pump.
9. the air cooling method of crystallization ammonium chloride solution according to claim 8, which is characterized in that the method uses
The air-cooling apparatus of crystallization ammonium chloride solution of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184816.9A CN109173328A (en) | 2018-10-11 | 2018-10-11 | Crystallize the air-cooling apparatus and its cooling means of ammonium chloride solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184816.9A CN109173328A (en) | 2018-10-11 | 2018-10-11 | Crystallize the air-cooling apparatus and its cooling means of ammonium chloride solution |
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| Publication Number | Publication Date |
|---|---|
| CN109173328A true CN109173328A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811184816.9A Pending CN109173328A (en) | 2018-10-11 | 2018-10-11 | Crystallize the air-cooling apparatus and its cooling means of ammonium chloride solution |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107519660A (en) * | 2016-06-20 | 2017-12-29 | 耒阳金悦科技发展有限公司 | Cooling crystallizing equipment |
| CN107670324A (en) * | 2017-11-03 | 2018-02-09 | 合肥宁垣工程技术有限责任公司 | A kind of air cooling crystallization process unit |
-
2018
- 2018-10-11 CN CN201811184816.9A patent/CN109173328A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107519660A (en) * | 2016-06-20 | 2017-12-29 | 耒阳金悦科技发展有限公司 | Cooling crystallizing equipment |
| CN107670324A (en) * | 2017-11-03 | 2018-02-09 | 合肥宁垣工程技术有限责任公司 | A kind of air cooling crystallization process unit |
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Application publication date: 20190111 |
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