CN111318038A - MVR horizontal tube falling film evaporation concentration device and process thereof - Google Patents
MVR horizontal tube falling film evaporation concentration device and process thereof Download PDFInfo
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- CN111318038A CN111318038A CN202010257953.1A CN202010257953A CN111318038A CN 111318038 A CN111318038 A CN 111318038A CN 202010257953 A CN202010257953 A CN 202010257953A CN 111318038 A CN111318038 A CN 111318038A
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- evaporation chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/04—Evaporators with horizontal tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses an MVR horizontal tube falling film evaporation concentration device and a process thereof, and the MVR horizontal tube falling film evaporation concentration device comprises an evaporation device main body, wherein the evaporation device main body comprises a first-effect evaporation chamber, a second-effect evaporation chamber and a third-effect evaporation chamber which are sequentially and horizontally arranged, a spraying device is arranged right above a condensation tube, one side of each of the first-effect evaporation chamber, the second-effect evaporation chamber and the third-effect evaporation chamber is respectively provided with a first material transferring pump, a second material transferring pump and a material discharging pump, one side of the second-effect evaporation chamber is provided with a condensation water tank for collecting condensed water, two ends of one side of the condensation water tank are respectively provided with a first heat exchanger and a second heat exchanger, one side of the first heat exchanger is connected with raw material water through a feeding pump, one end of the second heat exchanger is connected with the condensation water tank through a condensation water pump, and. The MVR horizontal tube falling film evaporation concentration device has the advantages of compact structure and low energy consumption.
Description
Technical Field
The invention belongs to the technical field of evaporation concentration, and particularly relates to an MVR horizontal tube falling film evaporation concentration device.
Background
The MVR is a short term for a mechanical vapor recompression (mechanical vapor recompression) technology, and is a vapor heat source for raising low-grade vapor into high-grade vapor by mechanical work of a compressor by using secondary vapor and energy thereof generated by an evaporation system. The circulation provides heat energy for the evaporation system, thereby reducing the requirement on external energy. At present, a vertical tube falling film evaporation device is mostly adopted in China, raw material solution enters from the top, enters a heating tube after being split on a distributor, is subjected to heat exchange evaporation with steam on the outer wall of the heating tube, stock solution flows down from the heating tube and enters a steam-liquid separation chamber, secondary steam is discharged, and concentrated solution can be discharged or circularly concentrated. The energy in the process comes from the heating of raw steam and a heater, condensed water can be reheated into steam for use or collected as a finished product, the overall structure is simpler, but the shape is larger, only heating pipes (heat exchange pipes) are always higher than 10 meters, the material consumption of the whole product is more, the price is high, the occupied area of the installation is large, the steam is required to be produced due to input, the secondary utilization of the energy is less, the energy consumption is high, and the cost of the produced product is high.
Disclosure of Invention
The invention aims to provide an MVR horizontal tube falling film evaporation concentration device and a process thereof, and aims to solve the problems of large occupied area and high production energy consumption of the conventional vertical tube falling film evaporation device.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a horizontal falling liquid film evaporation enrichment facility of MVR, includes the evaporation plant main part, the evaporation plant main part is including one effect evaporating chamber, two effect evaporating chambers and the triple effect evaporating chambers that the level set up in proper order, the inside of one effect evaporating chamber, two effect evaporating chambers and triple effect evaporating chambers all is equipped with a plurality of condenser pipes, be equipped with spray set directly over the condenser pipe, one side of one effect evaporating chamber, two effect evaporating chambers and triple effect evaporating chambers is equipped with first material transferring pump, second material transferring pump and ejection of compact pump respectively, one side of two effect evaporating chambers is equipped with the condensate tank that is used for compiling each effect comdenstion water, the both ends of condensate tank one side are equipped with first heat exchanger and second heat exchanger respectively, feed pump access raw materials water is passed through to one side of first heat exchanger, the one end of second heat exchanger is connected with the condensate tank through the condensate pump, and the other end is connected with one effect evaporating chamber through the heater, and a vacuum pump and a vapor compressor are arranged on the other side of the evaporation device main body.
Preferably, the interiors of the primary-effect evaporation chamber, the secondary-effect evaporation chamber and the tertiary-effect evaporation chamber are pumped to negative pressure by a vacuum pump.
Preferably, the single-effect evaporation chamber and the triple-effect evaporation chamber are connected through a vapor compressor.
Preferably, a steam flow through pipe connected with a condensing pipe in the secondary-effect evaporation chamber is arranged in the primary-effect evaporation chamber, the first material transferring pump is connected with a spraying device in the secondary-effect evaporation chamber through a pipeline, and the second material transferring pump is connected with the spraying device in the tertiary-effect evaporation chamber through a pipeline.
Preferably, the discharge pump connects the triple-effect evaporation chamber and the first heat exchanger through a pipeline.
A concentration process of the MVR horizontal tube falling film evaporation concentration device comprises the following steps: firstly, pumping negative pressure in a primary-effect evaporation chamber, a secondary-effect evaporation chamber and a tertiary-effect evaporation chamber to meet the process requirement through a vacuum pump, and then enabling raw material water in a normal-temperature state to enter a first heat exchanger and a second heat exchanger through a feed pump to respectively exchange heat with concentrated solution and condensed water;
then, uniformly spraying the steam generated on a condensing pipe in the first-effect evaporation chamber through a spraying device, inputting the first-effect secondary steam into the condensing pipe in the second-effect evaporation chamber, pumping the first-effect concentrated solution into the spraying device of the second-effect evaporation chamber through a first material transferring pump, and pumping the second-effect concentrated solution into the spraying device of the third-effect evaporation chamber through a second material transferring pump;
and finally, pumping out the final concentrated solution by a discharge pump, exchanging the final concentrated solution with the first heat exchanger, discharging, compressing and heating the naturally flashed steam in the triple-effect evaporation chamber by a steam compressor, then entering the single-effect evaporation chamber for condensing and evaporating raw material water, and circulating according to the condensation and evaporation.
The invention has the technical effects and advantages that: the MVR horizontal tube falling film evaporation concentration device has the advantages of compact structure and low energy consumption, and can evaporate at a lower temperature due to the action of negative pressure, so that the concentration effect is achieved without damaging active ingredients in a concentrated solution in the industries of food, medicine and the like, and the produced product has better quality;
the vapor compression part and the low-temperature evaporation part of the device (through negative pressure pumping) can be connected to other evaporation devices, and the device can be used in series in multiple effects according to needs, has wide application prospect and is worthy of popularization.
Drawings
Fig. 1 is a structural sectional view of the present invention.
In the figure: 100-an evaporation device main body, 101-a first-effect evaporation chamber, 102-a second-effect evaporation chamber, 103-a third-effect evaporation chamber, 4-a first heat exchanger, 5-a second heat exchanger, 6-a feeding pump, 7-a heater, 8-a spraying device, 9-a condensation pipe, 10-a first material transferring pump, 11-a second material transferring pump, 12-a discharging pump, 13-a condensation water tank, 14-a condensation water pump, 15-a vacuum pump and 16-a steam compressor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an MVR horizontal tube falling film evaporation concentration device as shown in the figure, which comprises an evaporation device main body 100, wherein the evaporation device main body 100 comprises a first-effect evaporation chamber 101, a second-effect evaporation chamber 102 and a third-effect evaporation chamber 103 which are sequentially and horizontally arranged, a plurality of condensation pipes 9 are arranged inside the first-effect evaporation chamber 101, the second-effect evaporation chamber 102 and the third-effect evaporation chamber 103, a spraying device 8 is arranged right above the condensation pipes 9, a first material transferring pump 10, a second material transferring pump 11 and a material discharging pump 12 are respectively arranged on one side of the first-effect evaporation chamber 101, the second-effect evaporation chamber 102 and the third-effect evaporation chamber 103, a condensation water tank 13 for collecting each effect of condensation water is arranged on one side of the second-effect evaporation chamber 2, a first heat exchanger 4 and a second heat exchanger 5 are respectively arranged on two ends of one side of the condensation water tank 13, raw material water is introduced into one side of the first heat exchanger 4 through a feeding pump 6, one end of the second heat exchanger 5 is connected with a condensed water tank 13 through a condensed water pump 14, and the other end is connected with a one-effect evaporation chamber 101 through a heater 7, and the other side of the evaporation device main body 100 is provided with a vacuum pump 15 and a vapor compressor 16.
In addition, the interiors of the first-effect evaporation chamber 101, the second-effect evaporation chamber 102 and the third-effect evaporation chamber 103 are pumped to negative pressure through the vacuum pump 15, so that evaporation at a lower temperature is facilitated, effective ingredients in concentrated solution are not damaged in industries such as food and medicine, a concentration effect is achieved, and produced products have better quality.
The first-effect evaporation chamber 101 and the third-effect evaporation chamber 103 are connected through the vapor compressor 16, so that the vapor which is naturally flashed in the third-effect evaporation chamber 103 is compressed and heated by the vapor compressor 16 and then enters the first-effect evaporation chamber 101 for condensation and evaporation of raw material water, the energy utilization rate is improved, and the energy is greatly saved. A steam circulation pipe connected with a condensation pipe 9 in the secondary-effect evaporation chamber 102 is arranged in the primary-effect evaporation chamber 101, the first material transfer pump 10 is connected with a spraying device 8 in the secondary-effect evaporation chamber 102 through a pipeline, and the second material transfer pump 11 is connected with the spraying device 8 in the tertiary-effect evaporation chamber 103 through a pipeline, so that secondary steam in the primary-effect evaporation chamber 101 enters the condensation pipe 9 in the secondary-effect evaporation chamber 102 through a steam circulation pipe, and concentrated solution (unevaporated raw material water) in the primary-effect evaporation chamber 101 is pumped into the spraying device 8 on the secondary-effect evaporation chamber 102 through the material transfer pump 1 to be evaporated and condensed; the concentrated solution (raw material water which is not evaporated) in the two-effect evaporation chamber 102 can enter the spraying device 8 in the three-effect evaporation chamber 103 through the material transfer pump 2 and then enter the three-effect evaporation chamber 103 for evaporation and condensation. The discharge pump 12 connects the triple-effect evaporation chamber 103 with the first heat exchanger 4 through a pipeline, which is beneficial to discharging the final concentrated solution after the final concentrated solution is pumped out by the discharge pump 12 and exchanges heat with the first heat exchanger 4.
In addition, the steam of natural flash evaporation generated by the triple-effect evaporation chamber 103 is compressed by the steam compressor 16 and then heated, the steam after compression and heating enters into a single effect to evaporate the raw material solution, the heat balance of the whole system is basically achieved after the operation for a certain time, and the heating tank is only used as a small amount of supplementary heat source, so that the energy is further saved.
The concentration process comprises the steps of firstly pumping negative pressure in a first-effect evaporation chamber 101, a second-effect evaporation chamber 102 and a third-effect evaporation chamber 103 to meet the process requirement through a vacuum pump 15, then enabling raw material water (in a normal-temperature state) to enter a first heat exchanger 4 and a second heat exchanger 5 to respectively exchange heat with concentrated liquid and condensed water through a feed pump 6, then uniformly spraying the raw material water on a condensation pipe 9 in the first-effect evaporation chamber 101 through a spraying device 8 to generate steam, then inputting first-effect secondary steam into a condensation pipe 9 in the second-effect evaporation chamber 102, pumping the first-effect concentrated liquid into the spraying device 8 of the second-effect evaporation chamber 102 through a first material transfer pump 10, pumping the second-effect concentrated liquid into the spraying device 8 of the third-effect evaporation chamber 103 through a second material transfer pump 11, finally pumping the final concentrated liquid out through a discharge pump 12 to exchange with the first heat exchanger 4 and discharging, compressing and heating naturally flashed steam in the third-effect evaporation chamber 103 through a steam compressor 16, and then enabling the naturally flashed steam to enter the first-effect evaporation chamber 101 to be condensed Raw material water, and circulating according to the raw material water.
The MVR horizontal tube falling film evaporation concentration device has the advantages of compact structure and low energy consumption, and can evaporate at a lower temperature due to the action of negative pressure, so that the concentration effect is achieved without damaging active ingredients in a concentrated solution in the industries of food, medicine and the like, and the produced product has better quality;
the vapor compression part and the low-temperature evaporation part of the device (through negative pressure pumping) can be connected to other evaporation devices, and the device can be used in series in multiple effects according to needs, has wide application prospect and is worthy of popularization.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a horizontal falling film evaporation concentration device of MVR, includes evaporation plant main part (100), its characterized in that: the evaporation device comprises an evaporation chamber (101), a second-effect evaporation chamber (102) and a third-effect evaporation chamber (103) which are sequentially and horizontally arranged, wherein a plurality of condensation pipes (9) are arranged inside the first-effect evaporation chamber (101), the second-effect evaporation chamber (102) and the third-effect evaporation chamber (103), a spraying device (8) is arranged right above the condensation pipes (9), a first material transferring pump (10), a second material transferring pump (11) and a material discharging pump (12) are respectively arranged on one side of the first-effect evaporation chamber (101), the second-effect evaporation chamber (102) and the third-effect evaporation chamber (103), a condensation water tank (13) for collecting each effect of condensation water is arranged on one side of the second-effect evaporation chamber (2), a first heat exchanger (4) and a second heat exchanger (5) are respectively arranged at two ends of one side of the condensation water tank (13), and raw material water is introduced into one side of the first heat exchanger (4) through a feeding pump (6), one end of the second heat exchanger (5) is connected with a condensed water tank (13) through a condensed water pump (14), the other end of the second heat exchanger is connected with a one-effect evaporation chamber (101) through a heater (7), and a vacuum pump (15) and a vapor compressor (16) are arranged on the other side of the evaporation device main body (100).
2. The MVR horizontal tube falling film evaporation concentration device according to claim 1, wherein: the interiors of the primary-effect evaporation chamber (101), the secondary-effect evaporation chamber (102) and the tertiary-effect evaporation chamber (103) are all pumped to negative pressure through a vacuum pump (15).
3. The MVR horizontal tube falling film evaporation concentration device according to claim 1, wherein: the single-effect evaporation chamber (101) and the three-effect evaporation chamber (103) are connected through a vapor compressor (16).
4. The MVR horizontal tube falling film evaporation concentration device according to claim 1, wherein: a steam circulation pipe connected with a condensation pipe (9) in the secondary-effect evaporation chamber (102) is arranged in the primary-effect evaporation chamber (101), the first material transferring pump (10) is connected with a spraying device (8) in the secondary-effect evaporation chamber (102) through a pipeline, and the second material transferring pump (11) is connected with the spraying device (8) in the tertiary-effect evaporation chamber (103) through a pipeline.
5. The MVR horizontal tube falling film evaporation concentration device according to claim 1, wherein: the discharge pump (12) connects the triple-effect evaporation chamber (103) with the first heat exchanger (4) through a pipeline.
6. A concentration process of the MVR horizontal tube falling film evaporation concentration device according to any one of claims 1 to 5, wherein: the process comprises the following steps: firstly, a vacuum pump (15) is used for pumping negative pressure into a primary effect evaporation chamber (101), a secondary effect evaporation chamber (102) and a tertiary effect evaporation chamber (103) to meet the process requirement, and then a feed pump (6) is used for enabling raw material water in a normal temperature state to enter a first heat exchanger (4) and a second heat exchanger (5) to respectively exchange heat with concentrated solution and condensed water;
then, uniformly spraying the steam generated on a condensing pipe (9) in a first-effect evaporation chamber (101) through a spraying device (8), inputting first-effect secondary steam into the condensing pipe (9) in a second-effect evaporation chamber (102), pumping first-effect concentrated solution into the spraying device (8) of the second-effect evaporation chamber (102) through a first material transferring pump (10), and pumping second-effect concentrated solution into the spraying device (8) of a third-effect evaporation chamber (103) through a second material transferring pump (11);
and finally, pumping out the final concentrated solution through a discharge pump (12), exchanging the final concentrated solution with the first heat exchanger (4), discharging, compressing and heating the naturally flashed steam in the three-effect evaporation chamber (103) through a steam compressor (16), then entering the one-effect evaporation chamber (101) for condensing and evaporating raw material water, and circulating according to the compression and heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257953.1A CN111318038A (en) | 2020-04-03 | 2020-04-03 | MVR horizontal tube falling film evaporation concentration device and process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010257953.1A CN111318038A (en) | 2020-04-03 | 2020-04-03 | MVR horizontal tube falling film evaporation concentration device and process thereof |
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| CN111318038A true CN111318038A (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112494969A (en) * | 2020-11-10 | 2021-03-16 | 衡阳丰联精细化工有限公司 | Dilute sulfuric acid concentration device and system thereof |
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2020
- 2020-04-03 CN CN202010257953.1A patent/CN111318038A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112494969A (en) * | 2020-11-10 | 2021-03-16 | 衡阳丰联精细化工有限公司 | Dilute sulfuric acid concentration device and system thereof |
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