CN115611342A - Chemical evaporator with secondary evaporation function - Google Patents
Chemical evaporator with secondary evaporation function Download PDFInfo
- Publication number
- CN115611342A CN115611342A CN202211210803.0A CN202211210803A CN115611342A CN 115611342 A CN115611342 A CN 115611342A CN 202211210803 A CN202211210803 A CN 202211210803A CN 115611342 A CN115611342 A CN 115611342A
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- CN
- China
- Prior art keywords
- pipeline
- steam
- evaporation
- separator
- evaporating chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001704 evaporation Methods 0.000 title claims abstract description 61
- 230000008020 evaporation Effects 0.000 title claims abstract description 42
- 239000000126 substance Substances 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 239000010865 sewage Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 9
- 239000011552 falling film Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 229920002472 Starch Polymers 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/06—Evaporators with vertical tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a chemical evaporator with a secondary evaporation function, which comprises an evaporation chamber, wherein the upper end and the lower end of the inside of the evaporation chamber are respectively provided with a tube plate, a plurality of heat exchange tubes are arranged between the upper tube plate and the lower tube plate, the upper part of the evaporation chamber is communicated with a waste liquid inlet pipeline, the lower part of the evaporation chamber is communicated with a sewage discharge pipeline, the side surface of the lower end of the evaporation chamber is communicated with a separator, a concentrated liquid outlet pipeline is arranged below the separator, a secondary steam pipeline is arranged above the separator, both sides of the upper end of the evaporation chamber are connected with steam inlet pipelines, an annular liquid spraying pipeline is embedded and installed in the middle area of the shell of the evaporation chamber, and the inner side surface of the annular liquid spraying pipeline is provided with a plurality of surrounding liquid spraying ports. The evaporator can utilize secondary steam to reheat waste liquid for secondary evaporation operation, is environment-friendly and energy-saving, and can play a better evaporation effect compared with the primary evaporation of the existing falling film evaporator.
Description
Technical Field
The invention relates to the technical field of starch wastewater evaporation equipment, in particular to a chemical evaporator with a secondary evaporation function.
Background
The falling film evaporation is that starch waste water is added from a heating chamber upper pipe box of a falling film evaporator, is uniformly distributed into each heat exchange pipe through a liquid distribution and film forming device and flows down along the inner wall of each heat exchange pipe in a uniform film shape, feed liquid is heated and vaporized by a shell pass heating medium in the flowing down process, generated steam and liquid phase enter a separation chamber of the evaporator together, the steam and the liquid are fully separated, secondary steam enters a condenser for condensation (single-effect operation) or enters a next-effect evaporator as a heating medium, so that the multi-effect operation is realized, and the liquid phase is discharged from the separation chamber. The solution flows in the falling film evaporator in a film shape, so that the convection heat transfer coefficient is greatly improved, the solution can reach the required concentration in one time of passing through the heating chamber, the concentration of the whole solution is always close to that of the finished solution, and the effective temperature difference of the evaporator is large. The falling-film evaporator is suitable for recycling the starch waste liquid, but secondary steam of the falling-film evaporator can cause heat waste if being directly condensed, more equipment and fields are needed if a multi-effect evaporator is used, and secondary evaporation operation of concentrated solution is difficult due to height difference.
Disclosure of Invention
The invention aims to provide a chemical evaporator with a secondary evaporation function, which can be used for carrying out secondary evaporation operation on waste liquid by reheating secondary steam, is environment-friendly and energy-saving, and can achieve a better evaporation effect compared with the primary evaporation of the existing falling film evaporator.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a chemical industry evaporimeter for having secondary evaporation function, includes the evaporating chamber, the inside upper and lower end of evaporating chamber all be equipped with the tube sheet and be equipped with a plurality of heat exchange tube from top to bottom between the tube sheet, evaporating chamber top intercommunication have waste liquid inlet pipe, evaporating chamber below intercommunication have the sewage pipes, evaporating chamber lower extreme side intercommunication have the separator, separator below be concentrate outlet pipe and top for the secondary steam pipeline, evaporating chamber upper end both sides all be connected with the steam inlet pipeline, evaporating chamber casing middle zone position department embedding install annular hydrojet pipeline, annular hydrojet pipeline medial surface be equipped with a plurality of hydrojet mouth that encircles, annular hydrojet pipeline and upper and lower evaporating chamber casing between all fill and have thermal-insulated sealing washer, the annular hydrojet pipeline outside communicate on the pipeline between evaporating chamber and the separator through the secondary reflux pipeline, the pipe on one's body of secondary reflux pipeline be equipped with the feed back pump, wherein the pipeline on one's body of nearly separator one side is equipped with mass flow meter, the secondary hydrojet pipeline of separator top be a steam reflux pipeline and steam outlet pipeline, the pneumatic valve is connected to the steam outlet on one side of steam inlet pipeline the steam outlet of steam inlet pipeline.
Furthermore, a condensed water outlet, a temperature measuring port and a pressure measuring port are also arranged on the outer side below the evaporation chamber.
Furthermore, the evaporation chamber, the separator, the feed back pump and the air heater are all installed on the frame.
Furthermore, the feed back pump, the mass flow meter, the air heater and the electric control pneumatic valve are all externally connected with a power supply and a control panel.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the secondary evaporation operation of the concentrated solution by arranging the secondary return pipeline, thereby improving the evaporation quality; through setting up steam backflow pipeline and air heater, carry out reutilization, environmental protection and energy saving, economic benefits is better to steam.
Drawings
FIG. 1 is a front view of an evaporator according to the present invention (with a portion of the evaporator housing cut away);
FIG. 2 is a rear view of the evaporator according to the present invention (with a part of the outer shell of the evaporator cut away);
FIG. 3 is a schematic view of the structure of an annular liquid spraying pipe (a part of an evaporation chamber shell is cut away) of the invention;
in the figure: 1. an evaporation chamber; 2. a waste liquid inlet pipe; 3. a steam inlet conduit; 4. a condensed water outlet; 5. a blowdown line; 6. a heat exchange pipe; 7. a separator; 8. a concentrated solution outlet; 9. an annular liquid spray conduit; 10. a mass flow meter; 11. an electrically controlled pneumatic valve; 12. an air heater; 13. a material return pump; 14. a secondary return line; 15. a heat insulation sealing ring; 16. and a liquid spraying port.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with reference to the specific drawings.
As shown in figures 1 and 2, the present application adds a new component between the traditional evaporation chamber 1 and the separator 7, realizes the secondary evaporation operation of the falling film evaporator, specifically, an annular liquid spraying pipeline 9 is installed at the middle area position of the evaporation chamber 1, an additional steam inlet pipeline 3 matched with a steam return pipeline is designed above the evaporation chamber 1, and is used for inputting the circulating secondary steam, the secondary steam is heated by an air heater 12 to reach the temperature requirement, the recycling is realized, and the diversion guide of the concentrated solution and the guide operation of the steam can be realized by arranging a mass flow meter 10 and an electrically controlled pneumatic valve 11.
As shown in fig. 3, the annular liquid spraying pipe 9 is sealed by an insulating sealing ring 15, the concentrated liquid is conveyed through a secondary return pipe 14, and power is supplied by a feed back pump 13.
During specific work, starch waste liquid enters the inside of the evaporation chamber 1 from the waste liquid inlet pipeline 2 above, is firstly shunted by the material homogenizing and distributing device and moves downwards along the side surfaces of the heat exchange pipes 6 respectively, hot steam is introduced through the steam inlet pipeline 3 in the process, the starch waste liquid is subjected to evaporation operation, generated dirt is discharged from the sewage discharge pipeline 5, condensed water flows out from the condensed water outlet 4, then concentrated liquid enters the inside of the separator 7, when the mass flowmeter 10 detects that the concentration does not meet the standard, the inlet is closed, the material return pump 13 is started at the same time, unqualified concentrated liquid enters the inside of the annular liquid spraying pipeline 9 from the secondary return pipeline 14 and is sprayed into the side surfaces of the heat exchange pipes 6 again from the liquid spraying port 16, at the moment, the electrically controlled pneumatic valve 11 can be closed through the control panel, the steam outlet pipeline is closed, so that secondary steam enters the inside of the air heater 12 from the steam return pipeline, and enters the inside of the evaporation chamber 1 from the additional steam inlet pipeline 3, and evaporation operation is performed.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a chemical industry evaporimeter for having secondary evaporation function, includes the evaporating chamber, the inside upper and lower end of evaporating chamber all be equipped with the tube sheet and be equipped with a plurality of heat exchange tube from top to bottom between the tube sheet, evaporating chamber top intercommunication have a waste liquid inlet pipe, evaporating chamber below intercommunication have a sewage pipes, evaporating chamber lower extreme side intercommunication have a separator, the separator below be secondary steam pipeline, its characterized in that for concentrate outlet pipe way and top: evaporating chamber upper end both sides all be connected with steam inlet pipeline, evaporating chamber casing middle zone position department embedding install annular liquid spray pipe, annular liquid spray pipe medial surface be equipped with a plurality of hydrojet mouth that encircles, annular liquid spray pipe and upper and lower evaporating chamber casing between all fill and have thermal-insulated sealing washer, annular liquid spray pipe outside communicate through the secondary return line on the pipeline between evaporating chamber and the separator, the pipe shaft of secondary return line on be equipped with the feed back pump, wherein be equipped with mass flowmeter on the pipeline pipe shaft of nearly separator one side, the secondary steam pipe bifurcation of separator top be a steam return line and a steam outlet pipeline, steam return line upwards be connected to the steam inlet pipeline of evaporating chamber upper end one side on, steam return line on be equipped with air heater, the steam outlet pipeline on be equipped with automatically controlled pneumatic valve.
2. The chemical evaporator with the secondary evaporation function as claimed in claim 1, wherein: and a condensed water outlet, a temperature measuring port and a pressure measuring port are also arranged on the outer side below the evaporation chamber.
3. The chemical evaporator with the secondary evaporation function as claimed in claim 1, wherein: the evaporation chamber, the separator, the feed back pump and the air heater are all arranged on the frame.
4. The chemical evaporator with the secondary evaporation function as claimed in claim 1, wherein: the feed back pump, the mass flow meter, the air heater and the electric control pneumatic valve are all externally connected with a power supply and a control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211210803.0A CN115611342A (en) | 2022-09-30 | 2022-09-30 | Chemical evaporator with secondary evaporation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211210803.0A CN115611342A (en) | 2022-09-30 | 2022-09-30 | Chemical evaporator with secondary evaporation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115611342A true CN115611342A (en) | 2023-01-17 |
Family
ID=84860295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211210803.0A Pending CN115611342A (en) | 2022-09-30 | 2022-09-30 | Chemical evaporator with secondary evaporation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115611342A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2323761C1 (en) * | 2007-01-09 | 2008-05-10 | Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") | Falling-film evaporator |
| CN102728077A (en) * | 2011-04-12 | 2012-10-17 | 金伟均 | External circulating evaporator |
| CN104759108A (en) * | 2015-03-23 | 2015-07-08 | 河北乐恒化工设备制造有限公司 | Three-stage continuous falling-film circulating evaporation concentration system with machinery vapor recompression |
| CN105727580A (en) * | 2016-05-11 | 2016-07-06 | 金溪县绿萃香精香料有限公司 | Falling film evaporator for preparing spices |
| CN207654729U (en) * | 2017-11-06 | 2018-07-27 | 湖北合加环境设备有限公司 | A kind of MVR evaporators |
| CN208448671U (en) * | 2018-06-22 | 2019-02-01 | 中国电建集团都江电力设备有限公司 | A kind of two-period form falling film evaporator equipment of secondary steam self-produced personal |
-
2022
- 2022-09-30 CN CN202211210803.0A patent/CN115611342A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2323761C1 (en) * | 2007-01-09 | 2008-05-10 | Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") | Falling-film evaporator |
| CN102728077A (en) * | 2011-04-12 | 2012-10-17 | 金伟均 | External circulating evaporator |
| CN104759108A (en) * | 2015-03-23 | 2015-07-08 | 河北乐恒化工设备制造有限公司 | Three-stage continuous falling-film circulating evaporation concentration system with machinery vapor recompression |
| CN105727580A (en) * | 2016-05-11 | 2016-07-06 | 金溪县绿萃香精香料有限公司 | Falling film evaporator for preparing spices |
| CN207654729U (en) * | 2017-11-06 | 2018-07-27 | 湖北合加环境设备有限公司 | A kind of MVR evaporators |
| CN208448671U (en) * | 2018-06-22 | 2019-02-01 | 中国电建集团都江电力设备有限公司 | A kind of two-period form falling film evaporator equipment of secondary steam self-produced personal |
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