CN210057418U - High-concentration evaporation separation system for organic matter aqueous solution - Google Patents
High-concentration evaporation separation system for organic matter aqueous solution Download PDFInfo
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- CN210057418U CN210057418U CN201920782591.0U CN201920782591U CN210057418U CN 210057418 U CN210057418 U CN 210057418U CN 201920782591 U CN201920782591 U CN 201920782591U CN 210057418 U CN210057418 U CN 210057418U
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Abstract
The utility model relates to the field of chemical industry environmental protection, in particular to a high-concentration evaporation separation system of organic matter aqueous solution, which comprises a falling film evaporator, a vapor compressor, a separation tower, a feed pump, a circulating discharge pump, a circulating pump and a preheater, wherein the falling film evaporator realizes double-pass double circulation; the feed pump is connected with the preheater, the preheater is connected with the falling film evaporator, the falling film evaporator is respectively connected with the circulating discharge pump, the circulating pump, the separation tower and the steam compressor, and the steam compressor is connected with the separation tower. The system can increase the concentration degree of the organic matter water solution, effectively control the content of the organic matters in the condensed water, reduce the chemical oxygen consumption in the condensed water, improve the recovery rate of the organic matters, and be favorable for the subsequent biochemical treatment of the condensed water.
Description
Technical Field
The utility model relates to a chemical industry environmental protection field, specific high concentration evaporation and separation system of organic matter aqueous solution that says so.
Background
Mechanical vapor recompression is an energy-saving technology in the existing evaporation and concentration process, and is applied to the fields of salt crystallization, organic wastewater treatment and the like. The chemical oxygen consumption of organic wastewater is often very high, and the organic wastewater cannot be treated by a general biochemical sewage treatment plant. The organic matter aqueous solution is treated by applying a mechanical vapor recompression technology, the organic matter is concentrated, enriched and recovered, and compared with the traditional evaporation concentration, the operation energy consumption can be greatly reduced, but the process also has limitation. In the process of concentrating the organic matters, the organic matters have volatility and can be evaporated out along with water during evaporation, the evaporation amount is rapidly increased along with the increase of the concentration degree, the recovery rate of the organic matters is greatly reduced, and the concentration degree is lower; meanwhile, due to the escape of organic matters, the chemical oxygen consumption of the evaporated condensate water is high, and the subsequent biochemical treatment is not facilitated.
There are also related patent applications in the prior art, such as chinese patent publication nos. CN2877825Y and CN2924428Y, in which CN2877825Y does not partition the interior of the concentrating evaporator described therein with structural improvement function, and its improvement is only to increase the number of circulating pumps additionally. And each independent part of CN2924428Y has no cyclic function. Based on this, the prior art still has the problems of low heat transfer coefficient, large heat transfer area and the like.
Disclosure of Invention
In order to overcome the problems in the prior art, a high-concentration evaporation separation system for organic water solution is provided.
In order to achieve the technical purpose, the technical scheme of the utility model is as follows:
a high-concentration evaporation separation system of organic matter aqueous solution is characterized in that: the device comprises a falling film evaporator for realizing double-pass double circulation, a vapor compressor, a separation tower, a feed pump, a circulating discharge pump, a circulating pump and a preheater; the feed pump is connected with the preheater, the preheater is connected with the falling film evaporator, the falling film evaporator is respectively connected with the circulating discharge pump, the circulating pump, the separation tower and the steam compressor, and the steam compressor is connected with the separation tower.
The falling film evaporator comprises a top feeding distribution area and a bottom circulation area, the top feeding distribution area is divided into a first distribution area and a second distribution area, the bottom circulation area is divided into a first circulation area and a second circulation area, and materials in the first circulation area enter the second circulation area through overflow.
The feed pump is connected with a cold material inlet of the preheater, a cold material outlet of the preheater is connected with an inlet of a first distribution area, an inlet of the circulating discharge pump is connected with an outlet of a second circulation area, an outlet of the circulating discharge pump is connected with an inlet of a second distribution area in the falling-film evaporator, a concentrated liquid outlet pipeline is arranged on an outlet pipeline of the circulating discharge pump, a gas phase outlet of the falling-film evaporator is connected with a gas phase inlet of the separation tower, a gas phase outlet of the separation tower is connected with an inlet of the vapor compressor, a reflux inlet of the separation tower is connected with a reflux pipeline, a bottom outlet of the separation tower is connected with an inlet of the first circulation area, an outlet of the first circulation area is connected with the circulating pump, an outlet of the circulating pump is connected with an inlet of the first distribution area, an outlet of the vapor compressor is connected with a vapor inlet of the falling-film evaporator, and a, and the hot material outlet of the preheater is connected with a condensed water discharge pipeline.
Four functional sections are set gradually from up down inside the knockout tower, do respectively: the device comprises an air inlet buffering distribution section, a gas-liquid mass transfer separation section, a reflux liquid distribution section and a gas phase defoaming section.
And the gas-liquid mass transfer separation section adopts structured packing.
The regular packing is preferably pore plate corrugated packing or wire mesh corrugated packing.
The structured packing of the gas-liquid mass transfer separation section is one section or a plurality of sections, and a liquid phase redistributor is arranged between the adjacent two sections of structures.
The reflux liquid distribution section adopts a liquid distributor.
The liquid distributor is a groove distributor, a tubular distributor, a disc distributor or a groove disc distributor.
The gas-phase defoaming section adopts one or the combination of a wire mesh demister, a baffle plate demister and a swirl plate demister.
The utility model has the advantages and beneficial effect:
1. the system is suitable for high-concentration evaporation separation of an organic matter aqueous solution system with a boiling point higher than that of water, such as an ethylene glycol, propylene glycol and glycerol aqueous solution system. The concentration degree of the organic matter aqueous solution can be increased, the organic matter content in the condensed water is effectively controlled, the chemical oxygen consumption in the condensed water is reduced, the recovery rate of the organic matter is improved, and the subsequent biochemical treatment of the condensed water is facilitated.
2. According to the method, the falling film evaporator in the mechanical vapor recompression evaporation system is divided into two parts, materials are subjected to double-pass double-circulation evaporation, the heat transfer temperature difference and the heat transfer coefficient can be increased, and the equipment investment of the falling film evaporator is reduced; a separation tower is additionally arranged in the mechanical vapor recompression evaporation system, the separation tower comprises four functional sections, liquid foam separation of vapor can be carried out in the evaporation and concentration process of the organic wastewater, organic components in the vapor can be removed, and the recovery rate of the organic components is improved; meanwhile, the concentration degree of organic matters is higher, the content of organic matters in steam is lower, and the oxygen consumption of steam condensate water is lower.
Drawings
Fig. 1 is a schematic flow chart of a high concentration evaporation separation system of an organic water solution provided by the utility model.
In the figure: the method comprises the following steps of 1-feeding pump, 2-circulating discharge pump, 3-preheater, 4-falling film evaporator, 5-steam compressor, 6-separation tower, 7-circulating pump, A-gas phase defoaming section, B-reflux liquid distribution section, C-gas-liquid mass transfer separation section, D-gas inlet buffer distribution section, a-first circulating zone, B-second circulating zone, C-first distribution zone and D-second distribution zone.
100-feeding, 200-water, 300-concentrated solution and 400-reflux.
In the figure, feeding enters from a feeding pump, concentrated solution enters a second distribution area from a second circulation area through a circulating discharging pump, and reflux liquid is in a reflux liquid distribution section.
Detailed Description
Example 1
A high-concentration evaporation separation system for organic water solution comprises a falling film evaporator 4 for realizing double-pass double circulation, a steam compressor 5, a separation tower 6, a feed pump 1, a circulating discharge pump 2, a circulating pump 7 and a preheater 3; the feed pump 1 is connected with a preheater 3, the preheater 3 is connected with a falling film evaporator 4, the falling film evaporator 4 is respectively connected with a circulating discharge pump 2, a circulating pump 7, a steam compressor 5 and a separation tower 6, and the steam compressor 5 is connected with the separation tower 6. The system is suitable for high-concentration evaporation separation of an organic matter aqueous solution system with a boiling point higher than that of water, such as an ethylene glycol, propylene glycol and glycerol aqueous solution system. The concentration degree of the organic matter aqueous solution can be increased, the organic matter content in the condensed water is effectively controlled, the chemical oxygen consumption in the condensed water is reduced, the recovery rate of the organic matter is improved, and the subsequent biochemical treatment of the condensed water is facilitated.
Example 2
A high-concentration evaporation separation system for organic water solution comprises a falling film evaporator 4 for realizing double-pass double circulation, a steam compressor 5, a separation tower 6, a feed pump 1, a circulating discharge pump 2, a circulating pump 7 and a preheater 3; the feed pump 1 is connected with a preheater 3, the preheater 3 is connected with a falling film evaporator 4, the falling film evaporator 4 is respectively connected with a circulating discharge pump 2, a circulating pump 7, a steam compressor 5 and a separation tower 6, and the steam compressor 5 is connected with the separation tower 6.
Falling-film evaporator 4 includes top feeding distribution district and bottom circulation district, top feeding distribution district is first distribution district and second distribution district, and the bottom circulation district is first circulation district and second circulation district, the material in first circulation district gets into the second circulation district through the overflow.
The feed pump 1 is connected with a cold material inlet of the preheater 3, a cold material outlet of the preheater 3 is connected with an inlet of a first distribution area, an inlet of the circulating discharge pump 2 is connected with an outlet of a second circulation area, an outlet of the circulating discharge pump 2 is connected with an inlet of the second distribution area in the falling-film evaporator 4, a concentrated solution outlet pipeline is arranged on an outlet pipeline of the circulating discharge pump 2, a gas phase outlet of the falling-film evaporator 4 is connected with a gas phase inlet of the separation tower 6, a gas phase outlet of the separation tower 6 is connected with an inlet of the steam compressor 5, a reflux inlet of the separation tower 6 is connected with a reflux pipeline, a bottom outlet of the separation tower 6 is connected with an inlet of the first circulation area, an outlet of the first circulation area is connected with the circulation pump 7, an outlet of the circulation pump 7 is connected with an inlet of the first distribution area, an outlet of the steam compressor 5 is connected with a, and a condensed water outlet of the falling-film evaporator 4 is connected with a hot material inlet of the preheater 3, and a hot material outlet of the preheater 3 is connected with a condensed water discharge pipeline.
Four functional sections are set gradually from up down inside 6 inside knockout towers, do respectively: the device comprises an air inlet buffering distribution section, a gas-liquid mass transfer separation section, a reflux liquid distribution section and a gas phase defoaming section.
The gas-liquid mass transfer separation section adopts regular packing. The structured packing with low gas resistance and high mass transfer efficiency is preferably pore plate corrugated packing and wire mesh corrugated packing. The structured packing of the gas-liquid mass transfer separation section is one section or a plurality of sections, and a liquid phase redistributor is arranged between the adjacent two sections of structures. The reflux liquid distribution section adopts a liquid distributor. The liquid distributor is a groove distributor, a tubular distributor, a disc distributor or a groove disc distributor. The gas phase defoaming section adopts a low gas resistance foam reducing and removing device which is one or the combination of a wire mesh foam remover, a baffle plate foam remover and a rotational flow plate foam remover.
The system is suitable for high-concentration evaporation separation of an organic matter aqueous solution system with a boiling point higher than that of water, such as an ethylene glycol, propylene glycol and glycerol aqueous solution system. The concentration degree of the organic matter aqueous solution can be increased, the organic matter content in the condensed water is effectively controlled, the chemical oxygen consumption in the condensed water is reduced, the recovery rate of the organic matter is improved, and the subsequent biochemical treatment of the condensed water is facilitated. According to the method, the falling film evaporator 4 in the mechanical vapor recompression evaporation system is divided into two parts, materials are subjected to double-pass double-circulation evaporation, the heat transfer temperature difference and the heat transfer coefficient can be increased, and the equipment investment of the falling film evaporator 4 is reduced; a separation tower 6 is additionally arranged in the mechanical vapor recompression evaporation system, the separation tower 6 comprises four functional sections, and liquid foam separation of vapor can be carried out in the evaporation and concentration process of the organic wastewater, and organic components in the vapor can be removed, so that the recovery rate of the organic components is improved; meanwhile, the concentration degree of organic matters is higher, the content of organic matters in steam is lower, and the oxygen consumption of steam condensate water is lower.
Claims (9)
1. A high-concentration evaporation separation system of organic matter aqueous solution is characterized in that: comprises a falling film evaporator (4) for realizing double-pass double circulation, a vapor compressor (5), a separation tower (6), a feed pump (1), a circulating discharge pump (2), a circulating pump (7) and a preheater (3); the feed pump (1) is connected with the preheater (3), the preheater (3) is connected with the falling-film evaporator (4), the falling-film evaporator (4) is respectively connected with the circulating discharge pump (2), the circulating pump (7), the separation tower (6) and the vapor compressor (5), and the vapor compressor (5) is connected with the separation tower (6); four functional sections are set gradually from up down inside knockout tower (6), do respectively: the device comprises an air inlet buffering distribution section, a gas-liquid mass transfer separation section, a reflux liquid distribution section and a gas phase defoaming section.
2. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 1, wherein: falling film evaporator (4) include top feeding distribution district and bottom circulation district, top feeding distribution district is first distribution district and second distribution district, and the bottom circulation district is first circulation district and second circulation district, the material in first circulation district gets into the second circulation district through the overflow.
3. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 2, wherein: the feed pump (1) is connected with a cold material inlet of the preheater (3), a cold material outlet of the preheater (3) is connected with an inlet of a first distribution area, an inlet of the circulating discharge pump (2) is connected with an outlet of a second circulation area, an outlet of the circulating discharge pump (2) is connected with an inlet of the second distribution area in the falling-film evaporator (4), an outlet pipeline of the circulating discharge pump (2) is provided with a concentrated solution outlet pipeline, a gas phase outlet of the falling-film evaporator (4) is connected with a gas phase inlet of the separation tower (6), a gas phase outlet of the separation tower (6) is connected with an inlet of the steam compressor (5), a liquid inlet of the separation tower (6) is connected with a reflux pipeline, a bottom outlet of the separation tower (6) is connected with an inlet of the first circulation area, an outlet of the first circulation area is connected with the circulation pump (7), and an outlet of the circulation pump (7) is connected with an inlet of the first distribution area, the outlet of the steam compressor (5) is connected with the steam inlet of the falling-film evaporator (4), the condensed water outlet of the falling-film evaporator (4) is connected with the hot material inlet of the preheater (3), and the hot material outlet of the preheater (3) is connected with a condensed water discharge pipeline.
4. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 1, wherein: the gas-liquid mass transfer separation section adopts regular packing.
5. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 4, wherein: the regular packing is pore plate corrugated packing or wire mesh corrugated packing.
6. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 1, wherein: the structured packing of the gas-liquid mass transfer separation section is one section or a plurality of sections, and a liquid phase redistributor is arranged between the adjacent two sections of structures.
7. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 1, wherein: the reflux liquid distribution section adopts a liquid distributor.
8. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 7, wherein: the liquid distributor is a trough distributor, a tubular distributor, a disc distributor or a trough-disc distributor.
9. The system for evaporation and separation of highly concentrated organic aqueous solution according to claim 1, wherein: the gas phase defoaming section adopts one or the combination of a wire mesh demister, a baffle plate demister and a swirl plate demister.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920782591.0U CN210057418U (en) | 2019-05-28 | 2019-05-28 | High-concentration evaporation separation system for organic matter aqueous solution |
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| CN201920782591.0U CN210057418U (en) | 2019-05-28 | 2019-05-28 | High-concentration evaporation separation system for organic matter aqueous solution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659142A (en) * | 2020-06-28 | 2020-09-15 | 太仓市宝马油脂设备有限公司 | Falling film distillation process for separating dichloromethane and white oil |
| CN111701263A (en) * | 2020-06-28 | 2020-09-25 | 太仓市宝马油脂设备有限公司 | Separation process of mixed liquid of dichloromethane and white oil |
-
2019
- 2019-05-28 CN CN201920782591.0U patent/CN210057418U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659142A (en) * | 2020-06-28 | 2020-09-15 | 太仓市宝马油脂设备有限公司 | Falling film distillation process for separating dichloromethane and white oil |
| CN111701263A (en) * | 2020-06-28 | 2020-09-25 | 太仓市宝马油脂设备有限公司 | Separation process of mixed liquid of dichloromethane and white oil |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211123 Address after: No.17, south 2nd section of 2nd Ring Road, Wuhou District, Chengdu, Sichuan 610000 Patentee after: CHENGDU NEWAVE AEROCHEMICAL Co.,Ltd. Address before: 610041, No. two, No. two, South Ring Road, Wuhou District, Sichuan, Chengdu, 17 Patentee before: THE SECOND RESEARCH INSTITURE OF CAAC Patentee before: Chengdu Civil Aviation Liuwei Aviation Co., Ltd |
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| TR01 | Transfer of patent right |