CN211724698U - Low-temperature vacuum evaporator - Google Patents
Low-temperature vacuum evaporator Download PDFInfo
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- CN211724698U CN211724698U CN201922417163.0U CN201922417163U CN211724698U CN 211724698 U CN211724698 U CN 211724698U CN 201922417163 U CN201922417163 U CN 201922417163U CN 211724698 U CN211724698 U CN 211724698U
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Abstract
The utility model relates to a low temperature vacuum evaporator, include: an evaporation tank as a main container for evaporation, wherein the lower part of the evaporation tank is provided with a concentrated solution discharge pipeline, the upper part of the evaporation tank is provided with a waste liquid inlet pipeline, and the inside of the evaporation tank can be kept in a reduced pressure state; the heating system is used for heating the waste liquid in the evaporation tank, and comprises a first storage mechanism arranged in the evaporation tank, a heating device for heating the substances in the first storage mechanism, and a heat circulation system for connecting the first storage mechanism and the heating device, wherein a heating medium is arranged in the first storage mechanism; the heating device is used for heating the first storage mechanism, and the heating device is used for heating the first storage mechanism; the distilled water tank is used for storing distilled water, the distilled water tank is connected with the condensing tank, and a distilled water discharge port is formed in the distilled water tank; and the pressure reducing device is connected with the distilled water tank so as to reduce the pressure in the evaporating tank, the condensing tank and the distilled water tank.
Description
Technical Field
The utility model relates to a low temperature vacuum evaporator belongs to the environmental protection equipment field.
Background
Energy and environmental issues have become increasingly prominent in industrial production, which puts higher demands on energy saving technology. The discharge of industrial wastewater causes serious environmental pollution, in order to protect the environment, the sewage discharge needs to be strictly controlled, each enterprise producing industrial wastewater needs to discharge sewage after treating the sewage in a special sewage treatment plant, and the sewage treatment plant generally charges according to the treatment capacity, for example, one ton and several thousand yuan, so the cost of the enterprise on sewage treatment is greatly increased. The heat pump technology is an efficient and environment-friendly energy-saving technology, and can be widely applied to the industrial production fields of chemical industry, low-grade heat energy utilization, seawater desalination, sewage treatment and the like. After the heat pump evaporation concentration, can follow and draw out the distilled water that accords with emission standard in the sewage, this distilled water can directly discharge, and remaining concentrate discharges sewage treatment plant again and handles the sewage treatment cost that can the significantly reduce enterprise, for example 10 tons of sewage can decompose into 9 tons of distilled water and 1 ton of concentrate after the evaporation concentration, and the enterprise only needs the cost of spending 1 ton of handling capacity to greatly reduced sewage treatment expense. However, most of the conventional evaporation and concentration equipment has very high price and high energy consumption, and the investment for purchasing one equipment is large for enterprises with small daily average treatment amount. Therefore, the development of a low-cost and high-efficiency heat pump evaporation concentration system is significant.
Most three effect evaporator or MVR concentrator at present, evaporating temperature is at 90 to 100 degrees more, and it is fast to produce the water spot, and the maintenance cost is high, and equipment life is short, and play water quality of water is not up to standard, in order to eliminate the problem that play water quality of water is not up to standard among the prior art, subsequent treatment cost and processing procedure increase greatly, still can produce a large amount of solid waste, influence the environmental protection. In addition, the waste liquid is evaporated at the bottom of the tank, more foams are generated, a large amount of defoaming agent is consumed, and the quality of the effluent water is poor. Moreover, most of heating devices adopted by the existing evaporators are prone to scaling, corrosion and the like due to the fact that waste liquid is loaded, the interior of the heating devices is not easy to clean, and the service life of the heating devices is greatly shortened.
The existing vacuum evaporation concentration system also has the defects of low treatment efficiency and high energy consumption. Therefore, the development of a new evaporating pot structure is significant.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low temperature vacuum evaporator can reduce the cost, increases the life of device, and impurity content such as foam is less in the produced steam, can increase the water yield and go out water quality of water.
In order to achieve the above purpose, the utility model provides a following technical scheme: a low temperature vacuum evaporator comprising:
an evaporation tank as a main container for evaporation, wherein a concentrated solution discharge pipeline is arranged at the lower part of the evaporation tank, a waste liquid inlet pipeline is arranged at the upper part of the evaporation tank, and the inside of the evaporation tank can be kept in a decompression state;
the heating system is used for heating the waste liquid in the evaporation tank and comprises a first storage mechanism arranged in the evaporation tank, a heating device for heating the substances in the first storage mechanism and a heat circulation system for connecting the first storage mechanism and the heating device, wherein a heating medium is arranged in the first storage mechanism;
a condensation tank for cooling, wherein the condensation tank is connected with the heating device through the heat circulation system, and the heat medium circulates among the first storage mechanism, the heating device and the condensation tank through the heat circulation system;
the distilled water tank is connected with the condensing tank and is provided with a distilled water outlet;
and the pressure reducing device is connected with the distilled water tank so as to reduce the pressure in the evaporating tank, the condensing tank and the distilled water tank.
Further, the heat cycle system comprises a first pipeline connecting the first storage mechanism, the heating device and the condensing tank, and a second pipeline connecting the first storage mechanism and the condensing tank.
Furthermore, a first expansion valve used for cooling the heat medium is arranged on the second pipeline, the heating device is a heat pump compressor, and the heat pump compressor is used for heating the heat medium flowing out of the condensation tank.
Further, the condensing tank includes the urceolus and sets up in the urceolus and with the cold water nest of tubes that the evaporating tank and distilled water jar are connected, the steam that the evaporating tank produced passes through the pipeline and enters into in the cold water nest of tubes, enter into after cooling by the interior back heat medium of cooling of urceolus after cooling.
Further, a second storage mechanism is arranged in the distilled water tank, the second storage mechanism is connected with the first storage mechanism through a third pipeline and is connected with the condensing tank through a fourth pipeline, a second expansion valve is arranged on the third pipeline, and a one-way valve is arranged on the fourth pipeline.
Furthermore, the evaporating pot comprises an upper pot body and a lower pot body which are opposite, and a bottom plate for supporting and fixing the first storage mechanism is arranged in the lower pot body; the head of the upper tank body is provided with a steam outlet, and the bottom of the lower tank body is provided with a concentrated solution outlet.
Further, a defoaming device for removing foam in the steam is arranged close to the steam outlet.
Further, the demister comprises a wire mesh demister disposed adjacent to the steam outlet and at least two baffles disposed above the first storage mechanism; an upper partition plate and a lower partition plate are arranged above the first storage mechanism, and the upper partition plate and the lower partition plate are arranged at intervals in a staggered mode in the vertical direction.
Furthermore, the evaporation tank is also communicated with a defoaming agent inlet pipeline and a cleaning liquid inlet pipeline; and the evaporating pot is also provided with a window assembly, a valve and a sensor assembly.
Further, the pressure reducing device comprises a centrifugal water pump and a water jet device, and the water jet device is arranged at the joint of the first pipeline and the second pipeline.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) the refrigeration principle is skillfully applied, the first storage mechanism and the condensing tank are communicated with each other, and a heat circulation system is communicated between the first storage mechanism and the condensing tank, so that the heat medium liquefaction process and the vaporization process are fully applied, the heating of waste liquid and the cooling of steam are respectively realized, the energy transfer in the conversion process of each physical phenomenon is fully utilized, and the requirement on external energy is saved;
2) the storage mechanism through which the heat medium flows is arranged in the evaporation tank, so that the damage of waste liquid to the interior of the heating device can be avoided, the service life of the device is prolonged, the cost is saved, and the device is easy to clean;
3) the arrangement of the partition plate and the wire mesh demister can avoid the phenomenon that the generated steam has less impurity content such as foam and the like, and the quality of the discharged water is improved.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 and 2 are schematic control diagrams of a low-temperature vacuum evaporator according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a construction of a vaporization tank in the low temperature vacuum vaporizer shown in FIG. 1;
fig. 4 is a schematic view of a structure of a condensing tank in the low temperature vacuum evaporator shown in fig. 1.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
It should be noted that: the terms such as "upper", "lower", "left", "right", "inner" and "outer" of the present invention are described with reference to the drawings, and are not intended to be limiting terms.
Referring to fig. 1 to 4, a low temperature vacuum evaporator according to a preferred embodiment of the present invention includes:
an evaporation tank 1 as a main container for evaporation, wherein a concentrated solution discharge pipeline 11 is arranged at the lower part of the evaporation tank 1, a waste liquid inlet pipeline 12 is arranged at the upper part of the evaporation tank 1, and the inside of the evaporation tank 1 can be kept in a decompression state;
the heating system 2 is used for heating the waste liquid in the evaporation tank 1, the heating system 2 comprises a first storage mechanism 21 arranged in the evaporation tank, a heating device 22 for heating the substances in the first storage mechanism 21, and a heat circulation system 23 for connecting the first storage mechanism 21 and the heating device 22, and a heat medium is arranged in the first storage mechanism 21;
a condensation tank 3 for cooling, the condensation tank 3 being connected to the heating device 22 through the heat circulation system 23, the heat medium being circulated among the first storage mechanism 21, the heating device 22, and the condensation tank 3 through the heat circulation system 23;
a distilled water tank 4 for storing distilled water, wherein the distilled water tank 4 is connected with the condensing tank 3, and a distilled water discharge port (not shown) is arranged on the distilled water tank 4;
and the pressure reducing device 5 is connected with the distilled water tank 4, so that the pressure in the evaporation tank 1, the condensation tank 3 and the distilled water tank 4 is reduced.
Specifically, the heat cycle system 23 includes a first pipe 231 connecting the first storage mechanism 21, the heating device 22 and the condensation tank 3, and a second pipe 232 connecting the first storage mechanism 21 and the condensation tank 3. The second pipeline 232 is provided with a first expansion valve 24 for cooling the heat medium, the heating device 22 is a heat pump compressor for heating the heat medium flowing out of the condensation tank 3. In the present embodiment, the first storage mechanism 21 is a coil, but in other embodiments, other storage mechanisms may be used to store the heating medium; and by adopting the coil pipe, the contact area between the coil pipe and the waste liquid can be greatly increased, and the heating efficiency can be increased. The heat medium is introduced from the condensing tank 3 into the first storage means 21 through the second pipe 232 via the heat pump compressor, and in the process, the gaseous heat medium is compressed into a liquid state to release a large amount of heat, and then heat exchange is performed with the waste liquid in the evaporation tank 1 to heat it. Subsequently, the liquid heating medium flows into the first pipe 231, and then enters the condensation tank 3 through the first expansion valve 24, and in the process, the liquid heating medium of medium temperature and high pressure is converted into a gaseous heating medium of low temperature and low pressure by the throttling function of the first expansion valve 24, and simultaneously absorbs a large amount of external heat, so that the heat exchange is performed on the steam from the evaporation tank 1 in the condensation tank 3 to reduce the temperature thereof, thereby achieving a cooling effect.
In this embodiment, the condensation tank 3 includes an outer cylinder 31 and a cold water pipe group 32 disposed in the outer cylinder 31 and connected to the evaporation tank and the distilled water tank 4, and the steam generated by the evaporation tank 1 enters the cold water pipe group 32 through a pipeline, is cooled by the post-cooling heat medium in the outer cylinder 31, and then enters the distilled water tank 4.
In this embodiment, a second storage mechanism 41 is disposed in the distilled water tank 4, the second storage mechanism 41 is connected to the first storage mechanism 21 through a third pipeline 42, and is connected to the condensation tank 3 through a fourth pipeline 44, a second expansion valve 43 is disposed on the third pipeline 42, and a check valve 45 is disposed on the fourth pipeline 44. The liquid heating medium of medium temperature and high pressure flows into the third pipeline 42, is converted into a gaseous heating medium of low temperature and low pressure by the second expansion valve 43, and then enters the second storage mechanism 41 to cool the distilled water in the distilled water tank 4, and then enters the outer cylinder 31 of the condensation tank 3 again by the fourth pipeline 44. In an embodiment, the second storage mechanism 41 is a coiled tube, although in other embodiments, other storage mechanisms may be used. Through setting up second storage mechanism 41, need not additionally to set up cooling device and come to cool down the processing to distilled water, greatly practiced thrift the use of the energy, reduced the energy consumption.
In the present embodiment, the evaporation tank 1 includes an upper tank 13 and a lower tank 14 which are opposite to each other, and a bottom plate (not shown) for supporting and fixing the first storage mechanism 21 is provided in the lower tank 14; the head of the upper tank 13 is provided with a steam outlet 131, and the bottom of the lower tank 14 is provided with a concentrated solution outlet 141. Preferably, the upper and lower cans 13 and 14 are connected by a flange 100 to facilitate assembly and disassembly. Near the steam outlet 131, a demister 15 for removing foam from the steam is provided. The demister 15 comprises a wire mesh demister 151 disposed adjacent to the steam outlet 131 and at least two baffles disposed above the first storage mechanism 21. An upper partition 152 and a lower partition 153 are arranged above the first storage mechanism 21, and the upper partition 152 and the lower partition 153 are arranged at intervals in a staggered manner in the vertical direction. During the rising process of the steam formed by the evaporation of the wastewater, the foam and other impurities are blocked by the partition plates and attached to the partition plates, and the gas continuously rises through the interval between the upper partition plate 152 and the lower partition plate 153, then passes through the wire mesh demister 151 to perform a round of defoaming, and finally enters the condensing tank 3 through the steam outlet 131 for cooling. The design ensures that the distilled water obtained by final cooling does not contain foam and other impurities, and the quality of the effluent is greatly improved. Indeed, in other embodiments, three or more partition plates may be further provided to perform defoaming and impurity removal, and the shape of the partition plate may be selected according to actual conditions, such as a curved shape, an inclined plane shape, and the like.
In this embodiment, the pressure reducing device 5 includes a centrifugal water pump 51 and a water jet 52, and the centrifugal water pump 51 and the water jet 52 circulate the distilled water in the distilled water tank 4 through fifth pipes 53 connected to the upper and lower portions of the distilled water tank 4 to reduce the pressure in the evaporation tank 1, the condensation tank 3, and the distilled water tank 4, thereby forming a negative pressure. The condensation tank 3 is connected to a water jet 52 through a sixth pipeline 54, and the distilled water cooled in the condensation tank 3 is collected to a fifth pipeline 53 through the sixth pipeline 54 and introduced into the distilled water tank 4. Part of the steam which is not completely condensed is cooled in the distilled water tank 4 through the second storage mechanism 41, so that the steam is completely condensed into distilled water and the temperature is low. The distilled water is then discharged through a seventh pipe 40.
In the evaporator of the utility model, the evaporating pot 1 is also communicated with a defoaming agent inlet pipeline 101 and a cleaning liquid inlet pipeline 102; the evaporation tank 1 is further provided with a window assembly 103, a valve assembly (not shown), a sensor assembly 104, etc., which are all in the prior art and will not be described herein.
In summary, the following steps: the utility model discloses a low temperature vacuum evaporator has following effect:
1) the refrigeration principle is skillfully applied, the first storage mechanism and the condensing tank are communicated with each other, and a heat circulation system is communicated between the first storage mechanism and the condensing tank, so that the heat medium liquefaction process and the vaporization process are fully applied, the heating of waste liquid and the cooling of steam are respectively realized, the energy transfer in the conversion process of each physical phenomenon is fully utilized, and the requirement on external energy is saved;
2) the storage mechanism through which the heat medium flows is arranged in the evaporation tank, so that the damage of waste liquid to the interior of the heating device can be avoided, the service life of the device is prolonged, the cost is saved, and the device is easy to clean;
3) the arrangement of the partition plate and the wire mesh demister 151 can avoid the phenomenon that the generated steam has low content of impurities such as foam and the like, and the quality of the discharged water is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A low temperature vacuum evaporator, comprising:
an evaporation tank as a main container for evaporation, wherein a concentrated solution discharge pipeline is arranged at the lower part of the evaporation tank, a waste liquid inlet pipeline is arranged at the upper part of the evaporation tank, and the inside of the evaporation tank can be kept in a decompression state;
the heating system is used for heating the waste liquid in the evaporation tank and comprises a first storage mechanism arranged in the evaporation tank, a heating device for heating the substances in the first storage mechanism and a heat circulation system for connecting the first storage mechanism and the heating device, wherein a heating medium is arranged in the first storage mechanism;
a condensation tank for cooling, wherein the condensation tank is connected with the heating device through the heat circulation system, and the heat medium circulates among the first storage mechanism, the heating device and the condensation tank through the heat circulation system;
the distilled water tank is connected with the condensing tank and is provided with a distilled water outlet;
and the pressure reducing device is connected with the distilled water tank so as to reduce the pressure in the evaporating tank, the condensing tank and the distilled water tank.
2. A cryogenic vacuum evaporator according to claim 1, wherein the thermal cycle system comprises a first pipeline connecting the first storage means, the heating device and the condensation tank, and a second pipeline connecting the first storage means and the condensation tank.
3. A low-temperature vacuum evaporator according to claim 2, wherein the second pipeline is provided with a first expansion valve for cooling the heating medium, the heating device is a heat pump compressor for heating the heating medium flowing out of the condensation tank.
4. A low-temperature vacuum evaporator according to claim 2, wherein the condensation tank includes an outer cylinder and a cold water pipe group provided in the outer cylinder and connected to the evaporation tank and the distilled water tank, and the steam generated from the evaporation tank enters the cold water pipe group through a pipeline, is cooled by the cooling medium in the outer cylinder, and then enters the distilled water tank.
5. A low-temperature vacuum evaporator according to claim 1, wherein a second storage mechanism is provided in the distilled water tank, the second storage mechanism is connected to the first storage mechanism through a third pipeline, and is connected to the condensation tank through a fourth pipeline, a second expansion valve is provided on the third pipeline, and a check valve is provided on the fourth pipeline.
6. A cryogenic vacuum evaporator according to claim 1 wherein the evaporator tank comprises opposed upper and lower tank bodies, the lower tank body having a floor for supporting and securing the first storage mechanism therein; the head of the upper tank body is provided with a steam outlet, and the bottom of the lower tank body is provided with a concentrated solution outlet.
7. A cryogenic vacuum evaporator according to claim 6, wherein near the steam outlet there is provided a demister for removing foam from the steam.
8. The cryogenic vacuum evaporator of claim 7, wherein the demister comprises a wire mesh demister disposed proximate to the vapor outlet and at least two baffles disposed above the first storage mechanism; an upper partition plate and a lower partition plate are arranged above the first storage mechanism, and the upper partition plate and the lower partition plate are arranged at intervals in a staggered mode in the vertical direction.
9. A low-temperature vacuum evaporator according to claim 1, wherein the evaporation tank is further communicated with a defoaming agent inlet pipeline and a cleaning solution inlet pipeline; and the evaporating pot is also provided with a window assembly, a valve and a sensor assembly.
10. A cryogenic vacuum evaporator according to claim 1 wherein the pressure reducing means comprises a centrifugal water pump and a water jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417163.0U CN211724698U (en) | 2019-12-30 | 2019-12-30 | Low-temperature vacuum evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417163.0U CN211724698U (en) | 2019-12-30 | 2019-12-30 | Low-temperature vacuum evaporator |
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| Publication Number | Publication Date |
|---|---|
| CN211724698U true CN211724698U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922417163.0U Active CN211724698U (en) | 2019-12-30 | 2019-12-30 | Low-temperature vacuum evaporator |
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| CN (1) | CN211724698U (en) |
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- 2019-12-30 CN CN201922417163.0U patent/CN211724698U/en active Active
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