CN214611624U - Low-temperature vacuum evaporator with stable vacuumizing effect - Google Patents

Abstract

The application relates to a low temperature vacuum evaporator with stabilize evacuation effect, it includes: the evaporation tank is provided with a steam outlet and a concentrated solution outlet; the liquid storage and pressure reduction system comprises a liquid storage tank connected with the evaporation tank, a pressure reduction device connected with the liquid storage tank, a gas collection device connected with the liquid storage tank and an air exhaust fan connected with the gas collection device; a heat exchanger; the evaporator is arranged in the evaporator tank, or is arranged outside the evaporator tank; and the heat pump system is connected with the heat exchanger to provide a heat exchange medium. The low-temperature vacuum evaporator can discharge non-condensable gas in the liquid storage tank in time, increases the efficiency of the pressure reducing device, and has a strong vacuumizing effect.

Description

Low-temperature vacuum evaporator with stable vacuumizing effect

Technical Field

The utility model relates to a low temperature vacuum evaporator with stabilize evacuation effect belongs to waste liquid evaporation equipment technical field.

Background

The discharge of industrial wastewater causes serious environmental pollution, in order to protect the environment, the sewage discharge needs to be strictly controlled, each large-scale refuse landfill enterprise needs to discharge sewage after the sewage is treated by 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 the sewage treatment is also 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.

At present, in the waste liquid treatment process of containing a large amount of incondensable gases such as landfill leachate, the liquid in the liquid storage tank of the existing evaporator can cause the vacuum system to be unable to normally generate vacuum if a large amount of gases exist, and the difficulty is great in the treatment process and even influences the normal operation of equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low temperature vacuum evaporator with stabilize evacuation effect can discharge the noncondensable gas in the liquid storage pot in time, increases pressure relief device's efficiency, has stronger evacuation effect.

In order to achieve the above purpose, the utility model provides a following technical scheme: a low-temperature vacuum evaporator with stable vacuumizing effect comprises:

the evaporation tank is provided with a steam outlet and a concentrated solution outlet;

the liquid storage and pressure reduction system comprises a liquid storage tank connected with the evaporation tank, a pressure reduction device connected with the liquid storage tank, a gas collection device connected with the liquid storage tank and an air exhaust fan connected with the gas collection device;

a heat exchanger; the evaporator is arranged in the evaporator tank, or is arranged outside the evaporator tank;

and the heat pump system is connected with the heat exchanger to provide a heat exchange medium.

Furthermore, a first liquid inlet and a first liquid outlet are formed in the liquid storage tank, the first liquid inlet is arranged close to the top of the liquid storage tank, or the first liquid inlet is arranged at the top of the liquid storage tank; the first liquid outlet is arranged at the bottom of the liquid storage tank, or the first liquid outlet is arranged close to the bottom of the liquid storage tank.

Further, the pressure reducing device comprises a centrifugal water pump and a water jet device, the water jet device is communicated with the first liquid outlet and the first liquid inlet, and liquid in the liquid storage tank is pumped into the water jet device from the first liquid outlet by the centrifugal water pump and then enters the liquid storage tank from the first liquid inlet.

Further, the gas collecting device is a spiral separator, the spiral separator is arranged at the top of the liquid storage tank, and the spiral separator stores liquid obtained through separation into the liquid storage tank.

Furthermore, a second liquid inlet and a second liquid outlet are formed in the liquid storage tank, the second liquid inlet is connected with an external water source through a water inlet pipe, and the second liquid outlet is connected with a liquid drainage pipeline.

Further, the second liquid outlet is arranged at the bottom of the liquid storage tank, or the second liquid outlet is arranged close to the bottom of the liquid storage tank.

Further, the second liquid inlet is arranged close to the top of the liquid storage tank, or the second liquid inlet is arranged at the top of the liquid storage tank.

Further, the heat pump system comprises a heat source device and a refrigerating device, and the heat exchanger comprises a first heat exchanger for heating waste liquid in the evaporation tank and a second heat exchanger for condensing steam.

Further, the heat source device comprises a compressor unit and an air inlet port, the compressor unit comprises a plurality of compressors arranged in parallel, each compressor is connected with the air inlet port and the heat exchanger, the air inlet port is used for distributing gaseous refrigerants to each compressor, and a heat exchange medium provided for the heat exchanger is formed so as to heat waste liquid in the evaporation tank and evaporate the waste liquid to form water vapor.

Further, the heat exchange medium in the first heat exchanger can flow into the refrigeration device and flow back to the compressor unit through the second heat exchanger; and the water vapor flowing into the second heat exchanger can be cooled by the heat exchange medium.

Compared with the prior art, the beneficial effects of the utility model reside in that: the low temperature vacuum evaporator with stabilize evacuation effect of this application can in time discharge the noncondensable gas in the liquid storage pot through setting up stock solution pressure reducing system, increases pressure relief device's efficiency, has stronger evacuation effect. Simultaneously, when the distilled water in the liquid storage pot contains more gas, can be with distilled water from the drain pipe discharge, the normal operating of pressure relief device is guaranteed to the feed liquor in the rethread inlet tube to the liquid storage pot.

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 is a block diagram of a low-temperature vacuum evaporator according to a first embodiment of the present invention;

FIG. 2 is a block diagram of a compressor unit in the low-temperature vacuum evaporator shown in FIG. 1;

FIGS. 3 and 4 are perspective views of a compressor unit in the low temperature vacuum evaporator shown in FIG. 1;

FIG. 5 is a perspective view of a suction duct of a compressor unit in the low temperature vacuum evaporator shown in FIG. 1;

FIG. 6 is a perspective view of a heat exchanger in the low temperature vacuum evaporator shown in FIG. 1;

FIG. 7 is a schematic view of the condensate tank of the low temperature vacuum evaporator shown in FIG. 1;

FIG. 8 is a block diagram of a liquid storage and pressure reduction system in the low-temperature vacuum evaporator shown in FIG. 1;

FIG. 9 is an exploded perspective view of a vaporization tank in the cryogenic vacuum vaporizer of FIG. 1;

fig. 10 is a schematic structural view of a liquid storage and pressure reduction system in a low-temperature vacuum evaporator according to the second embodiment of the present invention.

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.

Example one

Referring to fig. 1 to 9, a low-temperature vacuum evaporator according to a preferred embodiment of the present invention includes an evaporation tank 1, wherein the evaporation tank 1 is provided with a steam outlet 11 and a concentrated solution outlet 12; the heat exchanger 3 is arranged in the evaporation tank 1 or outside the evaporation tank 1; the heat source device 4 is connected with the heat exchanger 3 through a pipeline and used for providing a heat exchange medium for the heat exchanger 3; and the pressure reducing device 2 is used for vacuumizing the evaporation tank.

In the present embodiment, it is preferable that the steam outlet 11 is provided at the top of the evaporation tank 1 and the concentrated liquid discharge port 12 is provided at the bottom of the evaporation tank 1. Preferably, the heat exchanger 3 is arranged inside the evaporation tank 1; indeed, in other embodiments, the heat exchanger 3 may be arranged outside the evaporation tank 1, such as a conventional tubular heat exchanger.

In the present embodiment, the heat source device 4 is a heat pump compressor, and specifically includes a compressor set and an air inlet port connected to the refrigeration device 5. The compressor unit includes a plurality of compressors 41 arranged in parallel, and indeed, in other embodiments, the number of the compressors 41 may be selected according to actual needs, and the integrated compressor unit 4 may employ compressors 41 with different sizes and ratios to provide more adjustment stages, so that the cold output is more smoothly and dynamically matched with the actual load.

Utility model human is in order to make the efficiency of every compressor 41 obtain abundant performance to improve the heat treatment efficiency of whole compressor unit 4, be equipped with breathing pipe 42 at inlet port department, breathing pipe 42 extends along length direction (X direction in fig. 5), breathing pipe 42 is equipped with inlet port 4211 and the port 4222 of giving vent to anger, inlet port 4211 is used for providing gaseous state refrigerant in to breathing pipe 42, the port 4222 of giving vent to anger connects every compressor 41, in order to distribute the gaseous state refrigerant in the breathing pipe 42 to every compressor 41. The gas refrigerant is distributed to each compressor 41 through the suction pipe 42, so that the uniform suction of the compressor 41 can be promoted, the efficiency of each compressor 41 can be fully exerted, the heat treatment efficiency of the whole compressor unit can be improved, the liquid impact can be prevented, and the service life of the compressor unit can be prolonged.

Referring to fig. 5, the suction pipe 42 includes a main pipe 421 and branch pipes 422 corresponding to the compressors 41 one to one, the main pipe 421 is provided with an air inlet port 4211, the branch pipes 422 have an air outlet port 4222 and a suction port 4221, and the suction port 4221 is located inside the suction pipe. That is, the gaseous refrigerant is introduced into the suction pipe 42 through the inlet port 4211 of the main pipe 421, and the suction port 4221 of each branch pipe 422 distributes the gaseous refrigerant in the suction pipe 42 to each compressor 41 through the outlet port 4222. With this arrangement, the gaseous refrigerant can be uniformly distributed to each of the compressors 41. In this embodiment, the number of the compressors 41 is four, and correspondingly, the number of the branch pipes 422 is also four; in other embodiments, the number of manifolds 422 is uniformly adjusted based on the number of compressors 41.

Referring to fig. 5, the air suction pipe 42 extends in the longitudinal direction, the air suction pipe 42 has a cylindrical shape, and the ends of the air suction pipe 42 in the longitudinal direction are provided with sealing heads 420, that is, the ends of the air suction pipe 42 in the longitudinal direction are closed. The branch pipes 422 extend in the radial direction (indicated by Y direction in fig. 5) and are spaced apart in the longitudinal direction, and the air suction port 4221 and the air outlet port 4222 are located at opposite ends of the extension direction of the branch pipes 422, that is, the air suction port 4221 of the branch pipe 422 is located in the air suction pipe 42, and the air outlet port 4222 and the air inlet port 4211 are located at the same side of the air suction pipe 42.

Alternatively, the main pipe 421 extends along the radial direction, and along the length direction, the main pipe 421 and the plurality of branch pipes 422 are located on the same straight line, and the depth of each branch pipe 422 embedded into the air suction pipe 42 along the radial direction is greater than the depth of the main pipe 421 embedded into the air suction pipe 42. This arrangement facilitates the distribution of the gaseous refrigerant in the suction pipe 42 to each compressor 41 through the discharge port 4222 by the suction port 4221 of each branch pipe 422.

Alternatively, the plurality of branched pipes 422 are arranged at equal intervals in the length direction. With this arrangement, the gaseous refrigerant can be uniformly distributed to each of the compressors 41.

Alternatively, the main pipe 421 is located at a middle position of the suction pipe 42, and the plurality of branch pipes 422 are located at both sides of the main pipe 421. That is, the gaseous refrigerant is collected at the middle position of the suction pipe 42, and then is diffused from the middle position of the suction pipe 42 to the branch pipes 422, and is supplied to each compressor 41 from each branch pipe 422. The uniform suction of the compressor 41 can be promoted, and the efficiency of each compressor 41 can be sufficiently exhibited. However, the position of the main pipe 421 and the position of the branch pipe 422 are not limited to this, and may be selected as needed.

Alternatively, each of the branched tubes 422 is embedded in the air suction pipe 42 to the same depth in the radial direction. So that the gaseous refrigerant can be uniformly delivered to each compressor 41 by each branched pipe 422.

Alternatively, each branch 422 is embedded in the suction pipe 42 in a radial direction to the suction port 4221 near the inner wall of the suction pipe 42. That is, the suction port 4221 of the branch pipe 422 sucks the gaseous refrigerant at the bottom of the suction pipe 42. This setting mode makes liquid fluid deposit in the gaseous refrigerant in the breathing pipe 42 bottom, and the gaseous refrigerant can be taken away by compressor 41 and liquid fluid can be taken away after vaporizing, can guarantee on the one hand that the gaseous refrigerant is given vent to anger evenly, and on the other hand can avoid liquefied water to get into to the branch 422 in, can effectively prevent compressor 41 liquid attack, protection compressor 41.

Alternatively, referring to fig. 5, a baffle 4212 is provided at an end of the main pipe 421 opposite to the air inlet port 4211 in the radial direction, and the baffle 4212 is used to allow the gaseous refrigerant to flow into the air suction pipe 42 from the side wall of the main pipe 421 after entering the main pipe 421 through the air inlet port 4211. That is, one end of the main pipe 421 opposite to the air inlet port 4211 is blocked in the radial direction, and after the gaseous refrigerant enters the main pipe 421 from the air inlet port 4211, the gaseous refrigerant flows into the air intake pipe 42 not in the radial direction but flows into the air intake pipe 42 from the side wall of the main pipe 421 and spreads all around.

The arrangement mode can ensure that the low-temperature and low-pressure gaseous refrigerant entering from the air inlet port 4211 is uniformly distributed to the upper part of the inner cavity of the air suction pipe 42 through the baffle 4212, when the upper part of the inner cavity of the air suction pipe 42 is fully filled with the gaseous refrigerant, the gaseous refrigerant is uniformly dispersed and then is diffused to the lower part of the inner cavity of the air suction pipe 42, and then enters the branch pipe 422 from the air suction port 4221 of the branch pipe 422, so that the gaseous refrigerant is uniformly distributed to each compressor 41. Alternatively, in the present embodiment, the air suction port 4221 is an oblique opening provided at the bottom of the branch pipe 422. Above-mentioned setting mode makes liquid fluid deposit in the gaseous refrigerant in the breathing pipe 42 bottom, and the gaseous refrigerant can be taken away by compressor 41 and liquid fluid can be taken away after vaporizing, can guarantee on the one hand that the gaseous refrigerant is given vent to anger evenly, and on the other hand can avoid liquefied water to get into to the branch 422 in, can effectively prevent compressor 41 liquid attack, protection compressor 41.

Optionally, the baffles 4212 extend lengthwise and project out of the side walls of the main tube 421. The portion of the baffle 4212 protruding out of the side wall of the main pipe 421 plays a guiding role, and guides the gaseous refrigerant to enter the main pipe 421 from the air inlet port 4211, and then to diffuse from the side wall of the main pipe 421 toward the periphery of the inner cavity of the air suction pipe 42.

The utility model discloses the people finds that compressor unit 4 is in the use, and fluid in it often can flow from compressor 41, and consequently, in this embodiment, the port play of giving vent to anger that is connected at compressor unit 4 and evaporating pot 1 is provided with oil separator 43, and is preferred, and every compressor 41 corresponds the adaptation respectively and is equipped with an oil separator 43. The oil separator 43 is connected to the air outlet port and the air inlet port through an oil circulation pipe, and a valve 431, an oil filter 432, and an electronic oil level balancer 433 are provided on the oil circulation pipe. The high-temperature and high-pressure heat exchange medium pressed out by the compressor 41 firstly passes through the oil separator 43 to separate oil from the medium, and the compressors 41 with different sizes and proportions can realize stable oil return through the corresponding oil separators 43, so that the compressor 41 is ensured to work stably and has long service life. In this embodiment, the outlet port of the compressor unit 4 may also be provided with an exhaust pipe 44 to uniformly exhaust air, the exhaust pipe 44 is connected to the evaporation tank 1 and each oil separator 43, and the high-temperature and high-pressure heat exchange medium from which the oil is separated uniformly enters the exhaust pipe 44 and then enters the heat exchanger 3 through a pipeline.

In this embodiment, the heat exchanger 3 in the evaporation tank 1 is a coil heat exchanger, which is connected to the exhaust pipe 44 and the refrigeration device 5, and further, the coil heat exchanger is formed by a plurality of mosquito coil coils 31 arranged in parallel and in parallel along the axial direction (shown in the Z direction in fig. 6). Specifically, the coil heat exchanger includes a mosquito coil 31, a fixing device 32, and a first pipe 33 and a second pipe 34. The mosquito coil coils 31 are vertically and parallelly fixed on the fixing device 32, the first pipeline 33 and the second pipeline 34 are arranged on the periphery of the mosquito coil coils 31, the axial direction of the first pipeline 33 and the second pipeline 34 is perpendicular to the radial direction (shown in the direction M in fig. 6) of the mosquito coil coils 31, and through holes (not shown) for respectively connecting each mosquito coil 31 are arranged on the first pipeline 33 and the second pipeline 34. The heat exchange medium is uniformly distributed into each mosquito coil 31 through the first pipeline 33 and then collected and output from the second pipeline 34.

In this embodiment, each coil 31 is configured to output fluid from the inside of the coil 31 to the outside, specifically, the inside of the coil 31 is connected to the first pipe 33, and the outside of the coil 31 is connected to the second pipe 34. By adopting the arrangement mode, the system pressure drop caused by the fluid in the mosquito coil 31 can be avoided, thereby ensuring the stability of the heat exchange efficiency.

In this embodiment, the fixing device 32 corresponds to a plurality of fixing plates 321 arranged at intervals along the circumferential direction (shown by the direction N in fig. 6) of the mosquito coil 31 and a positioning plate 322 arranged on the outer periphery of the mosquito coil 31, each fixing plate 321 is arranged to extend along the radial direction M, a slot 3211 corresponding to the diameter of the mosquito coil 31 is arranged on the fixing plate 321, and the fixing plate 321 is fixed on the positioning plate 322. Specifically, a plurality of locating plates 322 evenly set up in mosquito-repellent incense coil 31's periphery (in this embodiment, adopt four locating plates 322 evenly to set up in mosquito-repellent incense coil 31's periphery), and fixed plate 321 sets up layer by layer in the vertical direction of locating plate 322, and every mosquito-repellent incense coil 31's pipeline is held in the draw-in groove 3211 circle by circle. Preferably, a gap is formed between adjacent mosquito coil pipes 31, so that the heat exchange area is increased and the later maintenance is facilitated.

The traditional coil heat exchanger has the advantages that when the rated heat exchange area is fixed, the span of a single whole group of coils is large, so that the manufacturing difficulty is large, the energy of a heat exchange medium cannot be fully converted, and the heat exchange efficiency is low. And the multiunit mosquito coil 31 of this application connects in parallel and parallel arrangement, and reducible its span and refrigerant (also be heat transfer medium) are at the circulation distance of its in, guarantee that its heat exchange efficiency is high and stable, are convenient for make simultaneously and dismouting installation to make things convenient for later maintenance and maintenance.

In this embodiment, the low-temperature vacuum evaporator further includes a condensing tank 6 connected to the refrigerating device 5 and the compressor unit 4, and a liquid storage tank 7 connected to the condensing tank 6, the steam outlet 11 is connected to the condensing tank 6, and the pressure reducing device 2 is connected to the liquid storage tank 7. The refrigerating device 5 is preferably an electronic expansion valve which is respectively connected with the heat exchanger 3 and the condensing tank 6, the heat exchange medium enters the heat exchanger 3 from the condensing tank 6 through the compressor unit 4 through a pipeline, in the process, the low-temperature gaseous heat exchange medium is compressed into high-temperature and high-pressure liquid and/or gaseous state, so that a large amount of heat is released, and then the heat exchange medium exchanges heat with the waste liquid in the evaporating tank 1 in the heat exchanger 3 to heat the waste liquid. Then, the liquid heat exchange medium flows through the electronic expansion valve 5 through a pipeline and enters the condensing tank 6, in the process, the liquid heat exchange medium with medium temperature and high pressure is converted into a gaseous heat exchange medium with low temperature and low pressure through the throttling function of the electronic expansion valve 5, and simultaneously a large amount of external heat is absorbed, so that heat exchange is carried out on steam from the evaporating tank 1 in the condensing tank 6, the temperature of the steam is reduced, and the cooling effect is achieved.

In the present embodiment, the condensation tank 6 includes an outer cylinder 61 and a cold water pipe group 62 provided in the outer cylinder 61 and connected to the evaporation tank 1 and the liquid storage tank 7, and the steam generated in the evaporation tank 1 enters the cold water pipe group 62 through a pipe, is cooled by the heat medium in the outer cylinder 61, and then enters the liquid storage tank 7. The pressure reducing device 2 of the present embodiment includes a centrifugal water pump 21 and a water jet 22, wherein the water jet 22 is connected to the condensation tank 6 and the liquid storage tank 7, and the centrifugal water pump 21 is connected to the liquid storage tank 7, the water jet 22 and the distilled water discharge pipe 72. Preferably, the liquid storage tank 7 is also provided with a heat exchanger 3 for cooling the steam which is not cooled in the condensation tank 6, the heat exchanger 3 is provided with a refrigerant therein and is connected with a cooling device 71, and the cooling device 71 circularly cools the refrigerant, thereby reducing the temperature of the distilled water in the liquid storage tank 7. The cooling device 71 may be a heat pump system, or may be other cooling devices, such as a semiconductor cooling plate. The number of coils in the heat exchanger 3 in the liquid storage tank 7 can be selected according to actual needs. The distilled water stored in the reservoir tank 7 is cooled to a predetermined temperature and then discharged through a distilled water discharge pipe 72.

In this embodiment, in order to avoid the evaporated water vapor from carrying other insoluble particles into the condensation tank 6 and the liquid storage tank 7, a steam purification device 13 is further provided in the evaporation tank 1. Specifically, this steam purification device 13 sets up in the top of heat exchanger 3, the below of steam outlet 11, and it includes along a plurality of baffle 131 of preventing smuggleing secretly of 1 vertical direction dislocation set in heat exchanger 3 top of evaporating pot to and set up at the filter purifier 132 of preventing smuggleing secretly taking baffle 131 top. The anti-pinch baffle 131 includes at least two partition plates disposed above the heat exchanger 3 in a staggered manner in the vertical direction, and in the present embodiment, the upper partition plate 1311 and the lower partition plate 1312 are provided, and the upper partition plate 1311 and the lower partition plate 1312 are disposed 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 continues to rise through the space between the upper partition plate 1311 and the lower partition plate 1312. Indeed, in other embodiments, a greater number of baffles may be used.

The filter purifier 132 of this embodiment comprises a filler support net plate 1321 disposed above the anti-pinch baffle 131 and a purifying filler 1322 placed on the filler support net plate 1321, in this embodiment, the purifying filler 1322 is preferably implemented by using a pall ring labyrinth filler. The evaporation tank 1 is provided with a manhole 14 at a corresponding position, and the pall ring labyrinth packing can be added and replaced through the manhole 14. Compare in traditional silk screen demister, adopt the structure of this embodiment, can not the scale deposit and block up and removable reuse, maintenance and maintenance cost reduce.

In this embodiment, the evaporation tank 1 is composed of three parts, namely an upper tank body 15, a middle tank body 16 and a lower tank body 17, and the upper tank body 15 and the middle tank body 16 and the lower tank body 17 are mechanically connected through flanges 18 so as to facilitate disassembly, maintenance and repair. Wherein, the steam outlet 11 is arranged at the top of the upper tank body 15, and the concentrated solution outlet 12 is arranged at the bottom of the lower tank body 17. In addition, the evaporating pot 1 is further provided with a through hole connected with the compressor unit 4, and is used for installing installation holes of devices such as sensors, monitors, valves and the like, a waste liquid inlet pipeline 18, a defoaming agent inlet pipeline, a cleaning agent inlet pipeline and the like, and the through hole, the waste liquid inlet pipeline, the defoaming agent inlet pipeline, the cleaning agent inlet pipeline and the like are all in the prior art and are not explained herein.

In this embodiment, utility model people discover, contain a large amount of noncondensable gas's waste liquid treatment in-process at processing landfill leachate etc. and liquid in the liquid storage pot 7 can lead to the unable normal vacuum that produces of pressure relief device 2 if there is a large amount of gas, influences equipment normal operating.

Example two

Referring to fig. 10, in another embodiment of the present invention, a liquid storage and pressure reduction system is shown, and other structures are the same as those of the first embodiment. Specifically, the stock solution pressure reduction system of this embodiment includes with the liquid storage pot 1 that is used for receiving gas and/or liquid, the inlet tube 2 of connecting this liquid storage pot 1, pressure relief device 3, gas collection device 4, drain 5 and air exhaust fan 7.

Wherein, inlet tube 2 is used for connecting outside water source, and when the distilled water in the liquid storage pot 1 contained more gas, perhaps, when the distilled water content in the liquid storage pot 1 was less (distilled water content is few can influence the evacuation effect), can follow drain line 5 and discharge, rethread inlet tube 2 is to the feed liquor in the liquid storage pot 1, guarantees pressure relief device 3's normal operating. In this embodiment, the external water source is a tap water tank 6.

As will be appreciated by those skilled in the art, the fluid reservoir 1 is typically connected, directly or indirectly, to a vacuum tank in an evaporative separation apparatus, primarily for receiving the gas evaporated from the vacuum tank; or, the liquid can be used for receiving the liquid after condensation treatment; or, alternatively, a mixture of gas and liquid. Typically, tank 1 receives a product that is a mixture of gas and liquid and contains some solid impurities.

In this embodiment, the pressure reducing device 3 includes a centrifugal water pump 31 and a water jet 32, the water jet 32 has a suction chamber and a nozzle, a liquid suction port is provided on the suction chamber, water in the liquid storage tank 1 is pumped into the water jet 32 under the action of the centrifugal water pump 31, so as to generate a vacuum pumping effect, and then enters the water storage tank 1. The liquid storage tank 1 is provided with a first liquid inlet 11, a second liquid inlet 12, a first liquid outlet 13, a second liquid outlet 14 and an air outlet 15. Wherein, the first liquid outlet 13 is connected with a suction chamber of the water jet device 32, and the first liquid inlet 11 is connected with a nozzle of the water jet device 32. Preferably, the first liquid inlet 11 is arranged close to the top of the liquid storage tank 1, or at the top of the liquid storage tank 1. The liquid enters from the top or near the top of the liquid storage tank 1 so that the gas in the liquid enters the gas collection device 4 under the action of the air extractor 7.

Similarly, the second liquid inlet 12 is connected with the running water tank 6 through the water inlet pipe 2, and is arranged near the top of the liquid storage tank 1, or is arranged at the top of the liquid storage tank 1. The second liquid outlet 14 is connected to a liquid discharge pipe 5, and is disposed at the bottom of the liquid storage tank 1, or is disposed near the bottom of the liquid storage tank 1.

In the embodiment, the provided gas collecting device 4 is a spiral separator, the spiral separator 4 is arranged at the top of the liquid storage tank 1, the spiral separator is connected with an air exhaust fan 7, the non-condensable gas in the liquid storage tank 1 is exhausted into the spiral separator 4 through the pressure reducing device 3 so as to separate the liquid from the gas and other solid impurities, and the non-condensable gas is exhausted from the air exhaust fan 7. Because the liquid is separated from the solid impurities, the discharged liquid (generally distilled water) has low impurity content and meets the discharge standard. As the liquid is separated from the gas, the spiral separator 4 is matched with the pressure reducing device 3, and plays a role in enhancing the vacuum pumping effect. In this embodiment, the pressure reducing device 3 is a water jet device, and indeed, in other embodiments, other pressure reducing devices may be used to evacuate the liquid storage tank 1 and the vacuum tank.

In this technique, a window mechanism (not shown), a valve mechanism (not shown), a temperature sensor (not shown), and the like are provided in the liquid storage tank 1, and when the temperature of the liquid in the liquid storage tank 1 is equal to or lower than a set temperature, the liquid is discharged through the liquid discharge pipe 5. And, the utility model discloses a vacuum tank that is used for stock solution pressure reducing system of evaporimeter can come to be connected with the difference respectively through setting up a plurality of pressure relief device 3.

In summary, the following steps: the utility model provides a stock solution pressure reduction system for evaporimeter can discharge the noncondensable gas in the liquid storage pot in time, increases pressure relief device's efficiency, has stronger evacuation effect. Simultaneously, when the distilled water in the liquid storage pot contains more gas, can be with distilled water from the drain pipe discharge, the normal operating of pressure relief device is guaranteed to the feed liquor in the rethread inlet tube to the liquid storage pot.

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 with stable vacuumizing effect is characterized by comprising:

the evaporation tank is provided with a steam outlet and a concentrated solution outlet;

the liquid storage and pressure reduction system comprises a liquid storage tank connected with the evaporation tank, a pressure reduction device connected with the liquid storage tank, a gas collection device connected with the liquid storage tank and an air exhaust fan connected with the gas collection device;

a heat exchanger; the evaporator is arranged in the evaporator tank, or is arranged outside the evaporator tank;

and the heat pump system is connected with the heat exchanger to provide a heat exchange medium.

2. A low-temperature vacuum evaporator with stable vacuumizing effect as claimed in claim 1, wherein the liquid storage tank is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet is arranged near the top of the liquid storage tank, or the first liquid inlet is arranged at the top of the liquid storage tank; the first liquid outlet is arranged at the bottom of the liquid storage tank, or the first liquid outlet is arranged close to the bottom of the liquid storage tank.

3. A cryogenic vacuum evaporator with a stable pumping effect according to claim 2 wherein the pressure reducing device comprises a centrifugal water pump and a water jet, the water jet is communicated with the first liquid outlet and the first liquid inlet, the centrifugal water pump pumps the liquid in the liquid storage tank from the first liquid outlet to the water jet, and then the liquid enters the liquid storage tank from the first liquid inlet.

4. A low temperature vacuum evaporator with a stabilized vacuum pumping effect as claimed in claim 1, wherein said gas collecting means is a spiral separator provided at the top of said liquid storage tank, said spiral separator storing the separated liquid into said liquid storage tank.

5. A low-temperature vacuum evaporator with stable vacuumizing effect as claimed in claim 1, wherein said liquid storage tank is provided with a second liquid inlet and a second liquid outlet, said second liquid inlet is connected with an external water source through a water inlet pipe, and said second liquid outlet is connected with a liquid discharge pipeline.

6. A cryogenic vacuum evaporator having a stabilized vacuum pumping effect as claimed in claim 5 wherein the second liquid outlet is located at the bottom of the liquid reservoir or the second liquid outlet is located near the bottom of the liquid reservoir.

7. A cryogenic vacuum evaporator having a stabilized evacuation effect according to claim 5 wherein the second inlet is located near the top of the liquid storage tank or the second inlet is located at the top of the liquid storage tank.

8. A low-temperature vacuum evaporator with a stable vacuumizing effect according to claim 1, wherein the heat pump system comprises a heat source device and a refrigerating device, and the heat exchanger comprises a first heat exchanger for heating the waste liquid in the evaporation tank and a second heat exchanger for condensing the steam.

9. A low-temperature vacuum evaporator with stable vacuumizing effect as claimed in claim 8, wherein the heat source device comprises a compressor unit and an air inlet, the compressor unit comprises a plurality of compressors connected in parallel, each compressor is respectively connected with the air inlet and the heat exchanger, the air inlet is used for distributing gaseous refrigerant to each compressor to form a heat exchange medium supplied to the heat exchanger so as to heat the waste liquid in the evaporation tank and evaporate the waste liquid to form water vapor.

10. A low-temperature vacuum evaporator with a stable vacuumizing effect as recited in claim 9, wherein the heat exchange medium in the first heat exchanger can flow into the refrigerating device and flow back to the compressor unit through the second heat exchanger; and the water vapor flowing into the second heat exchanger can be cooled by the heat exchange medium.

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