CN218847014U - Crystallization external cooler - Google Patents
Crystallization external cooler Download PDFInfo
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- CN218847014U CN218847014U CN202222335135.6U CN202222335135U CN218847014U CN 218847014 U CN218847014 U CN 218847014U CN 202222335135 U CN202222335135 U CN 202222335135U CN 218847014 U CN218847014 U CN 218847014U
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- external cooler
- main body
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- cooler main
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Abstract
The utility model discloses a crystallization external cooler, which comprises an external cooler main body, and a cooling medium inlet pipe, a cooling medium outlet pipe, a mother liquor inlet pipe and a mother liquor outlet pipe which are connected with the external cooler main body, wherein the external cooler main body is used for exchanging heat between the cooling medium and the mother liquor; a desalted water inlet pipe connected to the external cooler body and used for introducing desalted water into the external cooler body; a steam inlet pipe connected to the external cooler body for introducing steam into the external cooler body to form hot water with desalted water in the external cooler body so as to clean the external cooler body; and the blow-off pipe is connected with the outer cooler main body and used for discharging hot water. The crystallization external cooler can wash in the external cooler main part, improves heat transfer effect, promotes system productivity, reduces the energy consumption.
Description
Technical Field
The utility model belongs to the crystallization equipment, more specifically say, relate to a crystallization external cooler.
Background
The external crystallization cooler is used for cooling the mother liquor so as to facilitate the subsequent crystallization of the mother liquor through the crystallizer. Liquid ammonia from an alkali-associated liquid ammonia storage tank is added into a shell pass of the crystallization external cooler, and is gasified into gas ammonia after heat exchange with hot mother liquor from a crystallization mother liquor barrel in a tube pass, the gas ammonia enters an inlet of an ammonia compressor, and the gas ammonia is sent into the ammonia compressor by a cooling medium outlet pipe to produce liquid ammonia again so as to be sent into the external cooler main body again for heat exchange. As the compressed liquid ammonia after ammonia compression contains lubricating oil and circulates in the system for a long time, oil dirt in the liquid ammonia can be adsorbed on the heat exchange tube wall of the external cooler, the heat exchange effect of the heat exchanger is influenced, the productivity of a crystallization system is reduced, and the energy consumption and the consumption of the lubricating oil are increased.
Disclosure of Invention
In order to solve the problem, the utility model provides a crystallization external cooler that can self-cleaning.
The utility model adopts the following technical proposal.
A crystallization external cooler comprises an external cooler main body, and a cooling medium inlet pipe, a cooling medium outlet pipe, a mother liquid inlet pipe and a mother liquid outlet pipe which are connected to the external cooler main body, wherein the external cooler main body is used for carrying out heat exchange on a cooling medium and the mother liquid;
a desalted water inlet pipe connected to the external cooler body and used for introducing desalted water into the external cooler body;
a steam inlet pipe connected to the external cooler body for introducing steam into the external cooler body to form hot water with desalted water in the external cooler body so as to clean the external cooler body;
and the blow-off pipe is connected to the outer cooler main body and is used for discharging hot water.
Further, the cooling medium inlet pipe is used for introducing liquid ammonia, and the cooling medium outlet pipe is used for flowing out gas ammonia;
the crystallization external cooler still includes:
and the gas ammonia recovery system is connected with the cooling medium outlet pipe and used for recovering ammonia gas emitted when the hot water is used for cleaning the external cooler main body.
Further, the crystallization external cooler still includes:
and the demister is connected to the cooling medium outlet pipe and used for separating liquid in the ammonia gas, and the ammonia gas recovery system is connected to the demister.
Further, the crystallization external cooler still includes:
and the nitrogen inlet pipe is connected to the outer cooler main body and used for introducing nitrogen into the outer cooler main body after cleaning so as to displace other gases in the outer cooler main body.
Further, the crystallization external cooler still includes:
and the pressure gauge is arranged in the outer cooler main body and used for detecting the pressure in the outer cooler main body.
Further, the crystallization external cooler still includes:
and the thermometer is arranged in the external cooler main body and used for detecting the temperature in the external cooler main body.
Further, the crystallization external cooler still includes:
and the liquid level meter is arranged in the outer cooler main body and used for detecting the liquid level in the outer cooler main body.
Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The utility model realizes cooking, cleaning and absorbing oil stain on the heat exchange pipe wall of the external cooler through desalted water and steam, improves the heat exchange effect, improves the productivity of the system and reduces the energy consumption; the desalted water and steam can be obtained by a combined alkali production process.
(2) And the ammonia gas is recovered through a gas ammonia recovery system, so that the pollution is reduced.
(3) And ammonia is injected through the ammonia inlet pipe to displace other gases, so that the subsequent production is not influenced.
(4) The reaction is controlled by a press and a thermometer, so that the cleaning effect is ensured.
Drawings
FIG. 1 is a schematic view of an external cooling device for crystallization in this embodiment.
In the figure: the external cooler comprises an external cooler main body 1, a liquid level meter 2, a thermometer 3, a pressure gauge 4, a mother liquor inlet pipe 5, a mother liquor outlet pipe 6, a cooling medium inlet pipe 7, a cooling medium outlet pipe 8, a desalted water inlet pipe 9, a steam inlet pipe 10, a nitrogen inlet pipe 11, a blow-off pipe 12, a demister 13, structured packing 14, an ammonia compressor 15, a gas ammonia recovery system 16 and a demister liquid ammonia return pipe 17.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Referring to fig. 1, an embodiment of the present invention provides a crystallization external cooler. The crystallization external cooler is used for cooling the mother liquor so as to facilitate the subsequent crystallization of the mother liquor through the crystallizer.
The crystallization external cooler comprises an external cooler main body 1, and a cooling medium inlet pipe 7, a cooling medium outlet pipe 8, a mother liquor inlet pipe 5 and a mother liquor outlet pipe 6 which are connected to the external cooler main body 1, wherein the external cooler main body 1 is used for carrying out heat exchange between a cooling medium and mother liquor.
In at least one embodiment, the cooling medium is ammonia, wherein the cooling medium inlet pipe 7 is filled with liquid ammonia; the liquid ammonia and the mother liquor form gas ammonia after heat exchange in the external cooler, and the gas ammonia is sent out through a cooling medium outlet pipe 8.
The cooled mother liquor is sent to a crystallizer for crystallization through a mother liquor outlet pipe 6.
It is understood that in other embodiments, the cooling medium may be modified according to actual needs, such as water, etc.
In the illustrated embodiment, the crystallization intercooler further includes an ammonia compressor 15. The cooling medium outlet pipe 8 sends the gas ammonia into an ammonia compressor 15 to regenerate liquid ammonia so as to send the gas ammonia into the external cooler body 1 again for heat exchange.
In the illustrated embodiment, the external crystallization cooler further comprises a demister 13, and the demister 13 is further provided with a structured packing 14 for gas-liquid separation of ammonia gas and liquid ammonia. The demister 13 is connected to the cooling medium outlet pipe 8 and the ammonia compressor 15, respectively, to feed the gaseous ammonia to the ammonia compressor 15. The demister 13 is also connected to the external cooler body 1 through a demister liquid ammonia return pipe 17 to feed liquid ammonia into the external cooler body 1.
It is to be understood that in other embodiments, the ammonia compressor 15 and the demister 13 may be omitted as long as liquid ammonia can be introduced into the cooling medium inlet pipe 7.
Crystallization external cooler still includes:
a desalted water inlet pipe 9 connected to the external cooler main body 1 for introducing desalted water into the external cooler main body 1;
a steam inlet pipe 10 connected to the external cooler body 1 for introducing steam into the external cooler body 1 to form hot water with desalted water in the external cooler body 1 so as to clean the external cooler body 1;
and a drain pipe 12 connected to the external cooler body 1 for discharging hot water.
The desalted water and the steam form hot water for cooking, and the oil stain on the pipe wall floats on the water surface after being cooked and is discharged through the discharge pipe 12.
The crystallization external cooler still includes:
and the gas ammonia recovery system 16 is connected to the cooling medium outlet pipe 8 and is used for recovering ammonia emitted when the external cooler main body 1 is cleaned by hot water.
In the illustrated embodiment, the gas ammonia recovery system 16 is connected to a pipe between the demister 13 and the ammonia compressor 15 through a pipe to recover gas ammonia after gas-liquid separation.
It will be appreciated that in other embodiments, if the demister 13 is omitted, the gaseous ammonia recovery system 16 is directly connected to the cooling medium outlet pipe 8.
Further, the crystallization external cooler still includes:
and the nitrogen inlet pipe 11 is connected to the external cooler main body 1 and used for introducing nitrogen into the external cooler main body 1 after cleaning so as to displace other gases in the external cooler main body 1.
The displaced gas is mainly oxygen, and the oxygen content in the external cooler main body 1 is reduced to be below 0.5 percent so as not to influence the subsequent use.
Further, the crystallization external cooler still includes:
and the pressure gauge 4 is arranged in the external cooler main body 1 and used for detecting the pressure in the external cooler main body 1.
Further, the crystallization external cooler still includes:
and the thermometer 3 is arranged in the external cooler main body 1 and used for detecting the temperature in the external cooler main body 1.
Further, the crystallization external cooler still includes:
and the liquid level meter 2 is arranged in the external cooler main body 1 and used for detecting the liquid level in the external cooler main body 1.
It should be noted that, the pipes mentioned in this embodiment are all provided with valves to control the on-off of the pipes according to the needs; for example, when the desalinated water inlet pipe 9 is used, the steam inlet pipe 10 is closed, the portion of the cooling medium inlet pipe 7 connected to the cooling medium source is closed, and desalinated water is caused to enter the external cooler main body 1 via the desalinated water inlet pipe 9 and a portion of the pipe of the cooling medium inlet pipe 7.
When the crystallization external cooler is used:
under the condition that the heat exchange effect of the external cooler is poor, after the liquid ammonia in the external cooler main body 1 is used up, the liquid ammonia inlet valve and the gas ammonia outlet valve are closed, the hot mother liquid inlet valve is closed, the mother liquid outlet valve is closed, and the external cooler is stopped from being used.
The method comprises the steps of opening a desalted water inlet valve, introducing desalted water with the liquid level of about 50% into an external cooler main body 1 through a desalted water inlet pipe 9, closing the valve, opening a steam inlet valve, introducing steam into the external cooler main body 1 through a steam inlet pipe 10, controlling the desalted water in the external cooler main body 1 at about 80 ℃ through a thermometer 3, controlling the pressure in a working pressure range through a pressure gauge 4, cooking for about 4 hours with hot water, closing the steam inlet valve, opening an external cooler discharge pipe 12, discharging lower steam condensate water and desalted water to a recovery system, generating partial cooking ammonia in the cooking process, opening the ammonia recovery valve, introducing the partial cooking ammonia into an ammonia recovery system 16, after cooking and cleaning oil stains on the wall of the external cooler pipe through hot water and steam, discharging the sewage in the external cooler main body 1 to the greatest extent, opening a nitrogen inlet valve, introducing nitrogen through a nitrogen inlet pipe 11, reducing the oxygen content in the external cooler main body 1 to be below 0.5%, and putting the external cooler into normal use.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (7)
1. A crystallization external cooler comprises an external cooler main body, and a cooling medium inlet pipe, a cooling medium outlet pipe, a mother liquid inlet pipe and a mother liquid outlet pipe which are connected to the external cooler main body, wherein the external cooler main body is used for carrying out heat exchange on a cooling medium and the mother liquid;
its characterized in that, crystallization external cooler still includes:
a desalted water inlet pipe connected to the external cooler main body and used for introducing desalted water into the external cooler main body;
a steam inlet pipe connected to the external cooler body for introducing steam into the external cooler body to form hot water with desalted water in the external cooler body so as to clean the external cooler body;
and the blow-off pipe is connected with the outer cooler main body and used for discharging hot water.
2. A crystallization intercooler in accordance with claim 1, wherein: the cooling medium inlet pipe is used for introducing liquid ammonia, and the cooling medium outlet pipe is used for flowing out gas ammonia;
the crystallization external cooler still includes:
and the gas ammonia recovery system is connected with the cooling medium outlet pipe and used for recovering ammonia gas emitted when the hot water is used for cleaning the external cooler main body.
3. A crystallization intercooler as claimed in claim 2, wherein: the crystallization external cooler still includes:
and the demister is connected to the cooling medium outlet pipe and used for separating liquid in the ammonia gas, and the ammonia gas recovery system is connected to the demister.
4. A crystallization intercooler as claimed in claim 2, wherein: the crystallization external cooler still includes:
and the nitrogen inlet pipe is connected to the outer cooler main body and used for introducing nitrogen into the outer cooler main body after the outer cooler main body is cleaned again so as to displace other gases in the outer cooler main body.
5. A crystallization intercooler in accordance with claim 1, wherein: the crystallization external cooler still includes:
and the pressure gauge is arranged in the outer cooler main body and used for detecting the pressure in the outer cooler main body.
6. A crystallization intercooler in accordance with claim 1, wherein: the crystallization external cooler still includes:
and the thermometer is arranged in the external cooler main body and used for detecting the temperature in the external cooler main body.
7. A crystallization intercooler in accordance with claim 1, wherein: the crystallization external cooler still includes:
and the liquid level meter is arranged in the outer cooler main body and used for detecting the liquid level in the outer cooler main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335135.6U CN218847014U (en) | 2022-09-02 | 2022-09-02 | Crystallization external cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335135.6U CN218847014U (en) | 2022-09-02 | 2022-09-02 | Crystallization external cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218847014U true CN218847014U (en) | 2023-04-11 |
Family
ID=87308561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222335135.6U Active CN218847014U (en) | 2022-09-02 | 2022-09-02 | Crystallization external cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218847014U (en) |
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2022
- 2022-09-02 CN CN202222335135.6U patent/CN218847014U/en active Active
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