CN211215474U

CN211215474U - Low-temperature evaporation equipment with automatic foam eliminating function

Info

Publication number: CN211215474U
Application number: CN201921601921.8U
Authority: CN
Inventors: 卢丽君; 顾付朝; 鲍天钰; 鲍天钧
Original assignee: Wuxi Langpan Environmental Technology Co ltd
Current assignee: Wuxi Langpan Environmental Technology Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-08-11
Anticipated expiration: 2029-09-24

Abstract

The utility model provides a low-temperature evaporation device with an automatic foam eliminating function, which comprises a raw material pool, an evaporator, a compressor, a concentrated solution storage tank and a condensed water tank; the raw material pool is communicated with a liquid inlet of the evaporator; the evaporator comprises an evaporation chamber, a gas-liquid separation chamber and an evaporation circulation chamber which are sequentially communicated from bottom to top, a material level meter and an air inlet pipe are arranged in the evaporation chamber, an air inlet spray head is arranged on the air inlet pipe, the installation height of the air inlet spray head is higher than that of the material level meter, and one end of the air inlet pipe extends out of the evaporator and is provided with an electromagnetic valve to be communicated with the outside air; the bottom of the evaporation chamber is provided with a concentrated solution outlet which is communicated with a concentrated solution storage tank; the compressor is communicated with the evaporation circulation chamber and the evaporation chamber; the gas-liquid separation chamber is communicated with a condensation water tank; the evaporator is externally provided with a circulating pipeline, and two ends of the circulating pipeline are respectively connected with the evaporation chamber and the evaporation circulating chamber. The utility model discloses need not use the defoaming agent and increase supplementary throwing feeder apparatus, use safety and stability, the defoaming is with low costs.

Description

Low-temperature evaporation equipment with automatic foam eliminating function

Technical Field

The utility model belongs to the technical field of evaporation equipment, concretely relates to possesses low temperature evaporation equipment of automatic elimination foam function.

Background

The physical principle of the low-temperature evaporation equipment is that the boiling point of moisture in the evaporation material is reduced under the negative pressure state, and the moisture is evaporated out, so that the purpose of concentrating the material is achieved.

Under the negative pressure state, volatile gas and vapor in the material can form great gas flow when evaporating, when the material viscosity is great or contains substances such as surfactants and the like which are easy to form foam, a great deal of foam can be formed, the quality of effluent of condensed water is influenced, the recovery proportion of concentrated solution is reduced, and in severe cases, the foam enters the concentrated solution, the normal work of evaporation equipment is influenced, and the evaporation concentration can not be finished smoothly.

The conventional evaporation equipment generally adopts the addition of the defoaming agent in the aspect of solving the problem of foaming, but the defoaming agent has the following problems in the addition process:

1. whether foam is generated in the evaporation process or not can not be judged correctly, and whether defoaming facilities need to be additionally arranged or not can not be judged, so that the equipment investment can not be accurately calculated;

2. defoaming agent adding equipment is required to be added, and the floor area of the equipment is increased;

3. the adding amount of the defoaming agent cannot be accurately calculated, so that the excessive adding amount of the defoaming agent influences the water quality of the condensed water;

4. the defoaming agent needs to be added and configured manually in time, and the defoaming agent is not added in time once used up, which causes serious consequences;

5. the purchase, storage and use of the defoaming agent cause the increase of the operation cost;

6. it is not applicable to the evaporation process which needs to recover the concentrated solution and can not add the defoaming agent.

Therefore, it is necessary to develop a low-temperature evaporation apparatus having a function of automatically removing bubbles.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low temperature evaporation equipment who possesses automatic elimination foam function need not use the defoaming agent, need not increase supplementary throwing feeder apparatus, uses the safety and stability, and the defoaming is with low costs.

The utility model provides a following technical scheme:

a low-temperature evaporation device with an automatic foam eliminating function comprises a raw material pool, an evaporator, a compressor, a concentrated solution storage tank and a condensed water tank; the raw material pool is communicated with a liquid inlet of the evaporator through a water pump; the evaporator comprises an evaporation chamber, a gas-liquid separation chamber and an evaporation circulation chamber which are sequentially communicated from bottom to top, a material level meter and an air inlet pipe are arranged in the evaporation chamber, a plurality of air inlet nozzles are arranged on the air inlet pipe, the installation height of the air inlet nozzles is higher than that of the material level meter, an electromagnetic valve is arranged after one end of the air inlet pipe extends out of the evaporator, and one end of the air inlet pipe, which is positioned outside the evaporator, is communicated with outside air; a concentrated solution outlet is formed in the bottom of the evaporation chamber and communicated with the concentrated solution storage tank; the air inlet and the air outlet of the compressor are respectively communicated with the evaporation circulation chamber and the evaporation chamber; the gas-liquid separation chamber is communicated with the condensation water tank through a pipeline; the evaporator is externally provided with a circulating pipeline, and two ends of the circulating pipeline are respectively connected with the bottom of the evaporation chamber and the top of the evaporation circulating chamber.

Preferably, a transparent window is hermetically installed on the side wall of the evaporation chamber, and the transparent window is located below the air inlet nozzle.

Preferably, the air inlet nozzles are uniformly distributed on the air inlet pipe, and the air injection directions of the air inlet nozzles are arranged downwards.

Preferably, the air inlet nozzle is 3-8cm higher than the level meter.

Preferably, the installation position of the air outlet of the compressor on the evaporation chamber is lower than the height of the air inlet spray head.

Preferably, a filter is installed on the circulation pipeline.

The utility model has the advantages that: the utility model discloses at installation level meter and the shower nozzle of admitting air in the evaporating chamber, the level meter is used for responding to the height of foam, and in the evaporation process, along with the production and the accumulation of foam, when the foam reaches the height limit value that the level meter set for, open the solenoid valve that admits air, in the outside air was inhaled the evaporating chamber under the vacuum state, the evaporating chamber pressure slowly reduced, the material boiling point risees, and the boiling becomes steady, and the foam is automatic to be eliminated, guarantees that the evaporation can go on smoothly.

The utility model reduces the boiling point of the material by changing the vacuum degree in the evaporator evaporation chamber, thereby reducing the intensity of boiling of the material, finally reducing the generation amount of bubbles and eliminating the generated bubbles; no external auxiliary facilities are added, and the floor area is not increased; no medicament is used, the components of the concentrated solution are not changed, and the working process is safe and stable; the production cost is reduced on the whole through the beneficial effects.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the internal structure of the present invention;

labeled as: 1. a raw material pool; 2. an evaporator; 3. a compressor; 4. a concentrated solution storage tank; 5. a condensation water tank; 6. a water pump; 7. an evaporation chamber; 8. a gas-liquid separation chamber; 9. an evaporation circulation chamber; 10. a level meter; 11. an air inlet pipe; 12. an air inlet nozzle; 13. an electromagnetic valve; 14. a circulation pipe; 15. a filter; 16. a transparent window.

Detailed Description

As shown in fig. 1, a low-temperature evaporation apparatus with an automatic defoaming function includes a raw material tank 1, an evaporator 2, a compressor 3, a concentrated solution storage tank 4, and a condensed water tank 5. The evaporator 2 comprises an evaporation chamber 7, a gas-liquid separation chamber 8 and an evaporation circulation chamber 9 which are sequentially communicated from bottom to top, the raw material pool 1 is communicated with a liquid inlet on the evaporation chamber 7 through a water pump 6, and the water pump 6 pumps dilute solution in the raw material pool into the evaporation chamber 7. A material level meter 10 and an air inlet pipe 11 are arranged in the evaporation chamber 7, a plurality of air inlet nozzles 12 are uniformly arranged on the air inlet pipe 11, and the air injection directions of the air inlet nozzles 12 are arranged downwards; the installation height of the air inlet nozzle 12 is slightly higher than the height of the level gauge 10, preferably the air inlet nozzle is 3-8cm higher than the level gauge, and when the height of the foam exceeds the height detection limit value of the level gauge 10, the air inlet nozzle 12 can rapidly spray air to the foam. An electromagnetic valve 13 is installed after one end of the air inlet pipe 11 extends out of the evaporation chamber 7, and one end of the air inlet pipe 11 outside the evaporator 2 is communicated with the outside air. The level meter 10 and the electromagnetic valve 13 are both connected into a distributed control system of an evaporation process, the level meter 10 sends a level detection signal to the distributed control system, the distributed control system sends an action control signal to the electromagnetic valve 13 according to a detection result of the level meter 10, when foam generated due to boiling in the evaporation chamber 7 reaches a height detection limit value of the level meter 10, the system opens the electromagnetic valve 13, outside air is pumped into the evaporation chamber 7 through the air inlet pipe 11 under the negative pressure effect in the evaporation chamber 7, the pressure in the evaporation chamber 7 is slowly reduced, the boiling point of the material is increased, the boiling is enabled to be stable, and therefore the foam is eliminated.

The air inlet and the air outlet of the compressor 3 are respectively communicated with the evaporation circulation chamber 9 and the evaporation chamber 7, and the compressor 3 provides a negative pressure environment for the interior of the evaporator. The air outlet of the compressor 3 is arranged on the evaporation chamber 7 at a position lower than the height of the air inlet nozzle 12. The evaporator 2 is externally provided with a circulating pipeline 14, two ends of the circulating pipeline 14 are respectively connected with the bottom of the evaporation chamber 7 and the top of the evaporation circulating chamber 9, and the solution circularly flows along the circulating pipeline 14 and a loop formed inside the evaporator 2 under the pressure action of the compressor 3, and the solution is continuously evaporated in the process. The circulation pipe 14 is provided with a filter 15 for filtering the solution with a small amount of foam. The gas-liquid separation chamber 8 is communicated with the condensed water tank 5 through a pipeline, so that the evaporated condensed water can be conveniently and timely discharged out of the evaporator 2. The bottom of the evaporation chamber 7 is provided with a concentrated solution outlet which is communicated with the concentrated solution storage tank 4, and the evaporated concentrated solution is discharged out of the evaporation chamber 7 through the concentrated solution outlet and enters the concentrated solution storage tank 4.

A transparent window 16 is hermetically mounted on the side wall of the evaporation chamber 7, and the transparent window 16 is positioned below the air inlet nozzle 12. The interface between the solution and the foam inside the evaporation chamber 7 can be observed through the transparent window 16, so that the gas inlet nozzle 12 is prevented from being submerged due to overhigh solution liquid level inside the evaporation chamber 7, and the foam increase caused by the fact that the gas inlet nozzle 12 directly injects gas into the solution is avoided.

The utility model discloses a working process does: in the evaporation process, along with the generation and accumulation of foam, the foam reaches the height limit value set by the level gauge 10, the system automatically opens the air inlet electromagnetic valve 13, the external air is sucked into the evaporation chamber 7 in the vacuum state in the evaporator 2, the pressure in the evaporation chamber 7 is slowly reduced, the boiling point of the material is increased, the boiling is stable, the foam is automatically eliminated, the system closes the electromagnetic valve 13, and the evaporation process is smoothly carried out. If foam is produced again, the process is repeated.

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 described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-temperature evaporation device with an automatic foam eliminating function is characterized by comprising a raw material pool, an evaporator, a compressor, a concentrated solution storage tank and a condensed water tank; the raw material pool is communicated with a liquid inlet of the evaporator through a water pump; the evaporator comprises an evaporation chamber, a gas-liquid separation chamber and an evaporation circulation chamber which are sequentially communicated from bottom to top, a material level meter and an air inlet pipe are arranged in the evaporation chamber, a plurality of air inlet nozzles are arranged on the air inlet pipe, the installation height of the air inlet nozzles is higher than that of the material level meter, an electromagnetic valve is arranged after one end of the air inlet pipe extends out of the evaporator, and one end of the air inlet pipe, which is positioned outside the evaporator, is communicated with outside air; a concentrated solution outlet is formed in the bottom of the evaporation chamber and communicated with the concentrated solution storage tank; the air inlet and the air outlet of the compressor are respectively communicated with the evaporation circulation chamber and the evaporation chamber; the gas-liquid separation chamber is communicated with the condensation water tank through a pipeline; the evaporator is externally provided with a circulating pipeline, and two ends of the circulating pipeline are respectively connected with the bottom of the evaporation chamber and the top of the evaporation circulating chamber.

2. The cryogenic evaporation device with the function of automatically eliminating foam according to claim 1, wherein a transparent window is hermetically installed on a side wall of the evaporation chamber, and the transparent window is located below the air inlet nozzle.

3. The low-temperature evaporation equipment with the function of automatically eliminating the foam as claimed in claim 2, wherein a plurality of air inlet nozzles are uniformly distributed on the air inlet pipe, and the air injection direction of the air inlet nozzles is arranged downward.

4. The cryogenic evaporation device with automatic defoaming function of claim 3, wherein the air inlet nozzle is 3-8cm higher than the level gauge.

5. The cryogenic evaporator with an automatic defoaming function according to claim 4, wherein the installation position of the air outlet of the compressor on the evaporation chamber is lower than the height of the air inlet nozzle.

6. The cryogenic evaporation device with an automatic defoaming function according to any one of claims 1 to 5, wherein a filter is installed on the circulation pipe.