CN210495249U - Negative pressure low temperature heat pump type concentrator - Google Patents
Negative pressure low temperature heat pump type concentrator Download PDFInfo
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- CN210495249U CN210495249U CN201921374643.7U CN201921374643U CN210495249U CN 210495249 U CN210495249 U CN 210495249U CN 201921374643 U CN201921374643 U CN 201921374643U CN 210495249 U CN210495249 U CN 210495249U
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- 239000007788 liquid Substances 0.000 claims abstract description 150
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000001704 evaporation Methods 0.000 claims abstract description 73
- 230000008020 evaporation Effects 0.000 claims abstract description 67
- 238000005086 pumping Methods 0.000 claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000009833 condensation Methods 0.000 claims description 23
- 230000005494 condensation Effects 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 2
- 230000002528 anti-freeze Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 238000004378 air conditioning Methods 0.000 abstract description 9
- 239000003814 drug Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000012141 concentrate Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
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- 230000008025 crystallization Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 4
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- 239000010865 sewage Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 230000006835 compression Effects 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
- Y02A40/963—Off-grid food refrigeration
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Abstract
The utility model provides a negative pressure low temperature heat pump type enrichment facility, include: the heat pump unit comprises an evaporator, a condenser, a compressor and a throttling device; the solution to be concentrated flows into the negative pressure evaporation chamber shell from the liquid inlet pipe; the water vapor pumping device is used for realizing that the inside of the shell of the negative pressure evaporation chamber is in a negative pressure vacuum state; the monitoring element is used for monitoring the liquid level condition of the solution in the negative pressure evaporation chamber shell, and starting and closing the heat pump unit and the water pumping device; wherein the condenser tube is used for heating the solution to realize the concentration of the solution in the negative pressure evaporation chamber shell. The utility model provides a concentration device can realize that solution realizes negative pressure evaporation under the lower temperature condition to make solution obtain concentration or crystallization, and its latent heat feedback makes it obtain recycling repeatedly in the concentrate in the mass transfer in-process, can practice thrift a lot of energy, can be used to food medicine processing and need concentrated technology link, also can be used to the concentration of central air conditioning heat source tower antifreeze.
Description
Technical Field
The utility model relates to a petrochemical, food medicine and environmental protection sewage treatment concentrator technical field especially relates to a negative pressure low temperature heat pump type enrichment facility.
Background
Concentration is a matter encountered in the daily life and production fields, and most of concentration is to increase the concentration of a solution by evaporating a solvent by a physical method, reduce an unnecessary part and increase the relative content of a necessary part.
The concentration process is commonly used in the fields of food, biomedicine and chemical industry, and can also be used in the fields of sewage treatment and seawater desalination.
The concentration method comprises the following steps of gravity concentration: the natural settling separation mode of gravity action is utilized, external energy is not required, and the method is the most energy-saving sludge concentration method.
In view of the existing various solution concentration technical schemes, the mainstream is still a better advocating indirect low-temperature heat pump evaporation concentration technical scheme in pursuing concentration efficiency and concentration quality, but the heat transfer coefficient reduction and the heat exchanger area increase still cannot be overcome; in addition, the specific volume of steam is large during low-temperature operation, the equipment volume is required to be large, the equipment investment is increased, and a vacuum pump is required to maintain a certain vacuum degree, so the equipment investment is increased. For this the utility model discloses a in order to solve above-mentioned defect, adopt refrigerant circulation heat pump to feed back cyclic utilization material steam latent heat, combine water ring vacuum pump or condensation sprayer to realize the transfer of steam latent heat and the concentration of solution.
With prior art, the utility model discloses a "an antifreeze solution enrichment facility for docking open or closed heat source tower, patent number: 201910083051.8' which is only suitable for a central air-conditioning heat source tower, and the circulating water cooling and temperature rising control are troublesome, the temperature rising must be realized by hot fluid or an electric heating rod of a central air-conditioning main machine condenser, and the temperature lowering must be realized by low-temperature antifreeze solution from an evaporator through the central air-conditioning.
Therefore, it is necessary to provide a new negative pressure low temperature heat pump type concentration device to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a negative pressure low temperature heat pump type enrichment facility to solution enrichment facility is difficult to the technical problem of operation, adaptation technical field are narrow, energy is difficult to cyclic utilization under the low temperature among the prior art.
In order to solve the above technical problem, the utility model provides a negative pressure low temperature heat pump type enrichment facility includes:
the heat pump unit comprises an evaporator, a condenser, a compressor and a throttling device, wherein the condenser comprises a negative pressure evaporation chamber shell and a condensation pipe, the condensation pipe is arranged in the negative pressure evaporation chamber shell, and the compressor and the throttling device are respectively communicated with two ends of the evaporator and the condensation pipe;
a liquid inlet pipe which is communicated with the negative pressure evaporation chamber shell, and the solution to be concentrated flows into the negative pressure evaporation chamber shell from the liquid inlet pipe;
the water vapor pumping device is used for pumping water vapor and air in the negative pressure chamber shell so as to realize that the inside of the negative pressure evaporation chamber shell is in a negative pressure vacuum state;
the monitoring element is used for monitoring the liquid level condition of the solution in the negative pressure evaporation chamber shell and starting and closing the heat pump unit and the water pumping device according to the liquid level condition; wherein the condenser tube is used to heat the solution to achieve concentration of the solution within the negative pressure evaporation chamber housing.
Preferably, the negative-pressure low-temperature heat pump type concentration device further comprises a liquid outlet pipe, and the liquid outlet pipe is communicated with the negative-pressure evaporation chamber shell.
Preferably, the vapor extraction device stores a temperature raising liquid, and after the vapor is melted into the temperature raising liquid, the vapor extraction device is further configured to pump the temperature raising liquid back to the vapor extraction device after the temperature raising liquid is input into the evaporator.
Preferably, the water vapor pumping device further comprises a liquid storage tank, and the liquid storage tank is communicated with the water vapor pumping device and the evaporator; when the water vapor is melted into the heating liquid, the water vapor pumping device is also used for inputting the heating liquid into the liquid storage tank, then inputting the heating liquid into the evaporator and finally pumping the heating liquid back to the water vapor pumping device.
Preferably, a heater is arranged in the liquid storage tank and used for heating the warming liquid in the liquid storage tank.
Preferably, an overflow pipe is arranged on the liquid storage tank.
Preferably, the water pumping device is a water ring vacuum pump.
Preferably, the water vapor extraction device comprises a condensation ejector and a jet circulation pump which are connected with each other, the condensation ejector is communicated with the negative pressure evaporation chamber and the evaporator, and the jet circulation pump is communicated with the evaporator.
Preferably, the condenser further comprises fins, a water vapor pipe, a spray pipe and a liquid baffle plate, the fins are arranged on the condensation pipe, the water vapor pipe is communicated with the negative pressure evaporation chamber shell and the water pumping device, and the spray pipe and the liquid baffle plate are suspended in the negative pressure evaporation chamber shell; wherein, the shower is used for to the condenser pipe and the fin sprays the solution.
Preferably, the negative-pressure low-temperature heat pump type concentrating device further comprises a liquid inlet valve and a liquid outlet valve, the liquid inlet valve is arranged on the liquid inlet pipe, and the liquid outlet valve is arranged on the liquid outlet pipe.
In the negative-pressure low-temperature heat pump type concentration device provided by the utility model, the monitoring element is used for monitoring the liquid level condition of the solution in the negative-pressure evaporation chamber shell, and starting and closing the heat pump unit and the water pumping device according to the liquid level condition; wherein the condenser tube is used for heating the solution to realize the concentration of the solution in the negative pressure evaporation chamber shell;
condensing the gaseous refrigerant into liquid refrigerant in the condenser to heat the solution to be concentrated with the released heat; the negative pressure evaporation shell is kept in a negative pressure vacuum state by the water vapor pumping device; the solution to be concentrated is in a negative pressure vacuum state in the negative pressure evaporation chamber shell, absorbs the heat released by the condenser, gradually evaporates the moisture in the solution, and the evaporated moisture is changed into water vapor and then is discharged by the water pumping device;
therefore, the purpose of improving the concentration of the solution in the negative pressure evaporation shell is achieved, heat required by solution concentration is obtained from a condenser in the heat pump unit, concentration can be performed in a low-temperature environment, and the negative pressure low-temperature heat pump type concentration device is extremely high in compatibility and can be used in concentration equipment such as petrochemical industry, food and medicine, environment-friendly sewage treatment and central air conditioning.
Furthermore, the water pumping device is internally stored with a temperature raising liquid, and after the water vapor is melted into the temperature raising liquid, the water vapor pumping device is also used for inputting the temperature raising liquid into the evaporator to reduce the temperature of the evaporator, and the temperature raising liquid (circulating water) with the reduced temperature is pumped back into the water pumping device to condense the water vapor from the negative pressure evaporation chamber;
evaporating the liquid refrigerant in the evaporator into a gaseous refrigerant, absorbing the heat of the heating liquid to realize evaporation, and pressing the gaseous refrigerant into the condenser by the heat pump compressor to release latent heat to heat the concentrated solution; latent heat in water vapor can be fed back to the evaporator through the heating liquid for use, and energy recycling is achieved to a great extent.
Drawings
Fig. 1 is a schematic design diagram of a first embodiment of a negative-pressure low-temperature heat pump type concentration device according to the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the vacuum low temperature heat pump concentrator of the present invention;
FIG. 3 is a schematic diagram of a preferred embodiment of a condenser of the negative pressure low temperature heat pump type concentrator of the present invention;
fig. 4 is a schematic diagram of a use of the negative pressure low temperature heat pump type concentrator of fig. 1.
The reference numbers illustrate:
a heat pump unit (not numbered), a 1-evaporator, a 3-condenser, a 2-compressor and a 4-throttling device;
14-negative pressure evaporating chamber shell, 18-condenser tube, 19-fin, 17-steam tube, 15-spray tube and 16-liquid baffle plate;
a water vapor pumping device (not numbered), 11-a condensation ejector, 10-a jet circulating pump, a liquid inlet (not numbered), 12-a liquid outlet and 13-a vapor inlet;
8-a liquid storage tank, 9-an overflow pipe and 7-a heater;
a control unit (not shown), an exhaust control valve (not shown), a liquid level monitor (not shown);
5-liquid inlet pipe, 6-liquid outlet pipe, 21-liquid inlet valve and 24-liquid outlet valve;
20-solution, 23-heat source tower and 22-heat source tower circulating pump.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The utility model provides a negative pressure low temperature heat pump type enrichment facility.
First embodiment
Referring to fig. 1, the negative pressure low temperature heat pump type concentration apparatus includes:
the heat pump unit comprises an evaporator 1, a condenser 3, a compressor 2 and a throttling device 4, wherein the condenser 3 comprises a negative pressure evaporation chamber shell 14 and a condensation pipe 18, the condensation pipe 18 is arranged in the negative pressure evaporation chamber shell 14, and the compressor 2 and the throttling device are respectively communicated with two ends of the evaporator 1 and two ends of the condensation pipe 18;
a liquid inlet pipe 5, wherein the liquid inlet pipe 5 is communicated with the negative pressure evaporation chamber shell 14, and the solution 20 to be concentrated flows into the negative pressure evaporation chamber shell 14 from the liquid inlet pipe 5;
the water vapor pumping device is used for pumping water vapor and air in the negative pressure chamber shell so as to realize that the inside of the negative pressure evaporation chamber shell 14 is in a negative pressure vacuum state;
the monitoring element is used for monitoring the liquid level condition of the solution 20 in the negative pressure evaporation chamber shell 14 and starting and closing the heat pump unit and the water pumping device according to the liquid level condition; wherein the condenser 18 is configured to heat the solution 20 to effect concentration of the solution 20 within the sub-atmospheric evaporation chamber housing 14.
In the negative-pressure low-temperature heat pump type concentration device provided by the utility model, the monitoring element is used for monitoring the liquid level condition of the solution 20 in the negative-pressure evaporation chamber shell 14, and starting and closing the heat pump unit and the water pumping device according to the liquid level condition; wherein the condenser 18 is configured to heat the solution 20 to achieve concentration of the solution 20 in the sub-atmospheric evaporation chamber housing 14;
the condensation of the gaseous refrigerant in the condenser 3 into liquid refrigerant, with the heat released heating the condensed liquid; the negative pressure evaporation shell is kept in a negative pressure vacuum state by the water vapor pumping device; the solution 20 to be concentrated is in a negative pressure vacuum state in the negative pressure evaporation chamber shell 14, absorbs the heat released by the condenser 3, gradually evaporates the moisture in the solution 20, and the evaporated moisture is changed into water vapor and is discharged by the water vapor pumping device;
therefore, the purpose of improving the concentration of the solution 20 in the negative-pressure evaporation shell is achieved, heat required by concentration of the solution 20 is obtained from the condenser 3 in the heat pump unit, concentration can be performed in a low-temperature environment, and the negative-pressure low-temperature heat pump type concentration device is extremely high in compatibility and can be used in concentration equipment such as petrochemical industry, food and medicine, environment-friendly sewage treatment and central air conditioning.
In this embodiment, a temperature raising liquid is stored in the water vapor pumping device, and when the water vapor is melted into the temperature raising liquid, the water vapor pumping device is further configured to pump the temperature raising liquid back to the water vapor pumping device after the temperature raising liquid is input into the evaporator 1.
Furthermore, the pumping steam device stores a temperature raising liquid, after the water vapor is melted into the temperature raising liquid, the water vapor pumping device is also used for inputting the temperature raising liquid into the evaporator 1, releasing heat to the refrigerant to evaporate the refrigerant, transferring the heat into the condenser through the heat pump compressor to exchange with the concentrated solution, and pumping the temperature lowering temperature raising liquid back into the pumping steam device again to condense the water vapor from the negative pressure evaporation chamber;
the liquid refrigerant is evaporated into a gaseous refrigerant in the evaporator 1, and heat is absorbed; latent heat in water vapor can be fed back to the evaporator 1 through the heating liquid for evaporation, and is converted to concentrated liquid through the heat pump compressor again, so that energy recycling is realized to a great extent.
As a preferable mode of this embodiment, the water vapor pumping device may further include an external liquid storage tank 8, and the liquid storage tank 8 communicates the water vapor pumping device and the evaporator 1; when the water vapor is melted into the heating liquid, the water vapor pumping device is also used for firstly inputting the heating liquid into the liquid storage tank 8, then inputting the heating liquid into the evaporator 1, and finally pumping the heating liquid back to the water vapor pumping device.
A heater 7 is arranged in the liquid storage tank 8, and the heater 7 is used for heating the heating liquid in the liquid storage tank 8. The heater 7 may be a heating rod. The heating liquid is circulating water.
If the temperature of the dilute solution 20 is lower, the temperature of the circulating water can be increased through the electric heating rod, and initial heat is provided for the concentration device system.
When the temperature of the circulating water reaches a preset requirement, the electric heating rod stops working immediately, and the heat of the circulating water is transferred into the dilute solution 20 through the heat pump unit, so that the specific volume of water vapor is reduced to improve the working efficiency of the vacuum-pumping device, and the concentration device system can obtain initial heat. This heat can be recycled in the system, especially when used in the central air conditioning heat source tower 23, by providing electrical heating rods in the circulating water tank, on the one hand, to prevent the circulating water from freezing due to low ambient temperature, which would result in the concentrating device not being operated, and on the other hand, to provide initial heat to the system.
An overflow pipe 9 is arranged on the liquid storage tank 8 so as to overflow redundant liquid water condensed from water vapor in the liquid storage tank 8 in time.
As another alternative of this embodiment, the water vapor pumping device may not include the external liquid storage tank 8, and the housing of the evaporator 1 may be directly used as the liquid storage tank 8.
Referring to fig. 3, as a preferred mode of the condenser 3, the condenser 3 may further include a fin 19, a steam pipe 17, a spray pipe 15, and a liquid baffle 16, the fin 19 is disposed on the condensing pipe 18, the steam pipe communicates the negative pressure evaporation chamber housing 14 and the steam pumping device, and the spray pipe 15 and the liquid baffle 16 are suspended in the negative pressure evaporation chamber housing 14; wherein the spraying pipe 15 is used for spraying the solution 20 to the condensation pipe 18 and the fin 19.
The spray pipe 15 can be directly connected with the liquid inlet pipe 5; the shower 15 may also be connected to a suction pump (e.g., a water pump) for drawing the solution 20 from the sub-atmospheric evaporation chamber housing 14.
The negative-pressure low-temperature heat pump type concentrating device further comprises a liquid outlet pipe 6, and the liquid outlet pipe 6 is communicated with the negative-pressure evaporation chamber shell 14.
The negative-pressure low-temperature heat pump type concentrating device further comprises a liquid inlet valve 21 and a liquid outlet valve 24, wherein the liquid inlet valve 21 is arranged on the liquid inlet pipe 5, and the liquid outlet valve 24 is arranged on the liquid outlet pipe 6.
In this embodiment, the steam pumping device is a water ring vacuum pump. The water vapor pumping device is provided with a water inlet, a water outlet and a vapor inlet 13, the vapor inlet 13 is communicated with the negative pressure evaporation chamber shell 14, and the water inlet and the water outlet are respectively communicated with two ends of the evaporator 1; wherein, the water outlet can be communicated with the evaporator 1 through the liquid storage tank 8.
The control element may include an exhaust air control valve provided in the negative pressure evaporation chamber housing 14 and a liquid level monitor provided in the negative pressure evaporation chamber. The exhaust control valve is used for controlling the gas circulation between the negative pressure evaporation chamber and the outside; the liquid level monitor is used for detecting and controlling the liquid level height of the solution 20 in the negative pressure evaporation chamber.
A preferred control method of the control element is as follows:
when the negative-pressure low-temperature heat pump type concentration device is in a use state, the liquid inlet pipe 5 is opened, the liquid outlet pipe 6 is closed, and the solution 20 to be concentrated enters the negative-pressure evaporation chamber shell 14 from the liquid inlet pipe 5;
when the monitoring element detects that the liquid level of the solution 20 in the negative pressure evaporation chamber shell 14 rises to a preset first height value, the monitoring element closes the liquid inlet pipe 5 and starts the heat pump unit and the water vapor extraction device;
wherein, the water vapor extraction device is used for extracting water vapor and air in the negative pressure evaporation chamber shell 14, and the condensation pipe 18 is used for increasing the temperature of the solution 20 in the negative pressure evaporation chamber shell 14; the water vapor pumping device is also used for sending the heating liquid into the evaporator 1 and then sending the heating liquid back to the water vapor pumping device again;
when the liquid level monitor detects that the liquid level in the negative pressure evaporation chamber shell 14 is reduced to a preset second height value, the monitoring element controls the liquid inlet pipe 5 to be closed, and the liquid outlet pipe 6 to be opened;
when the monitoring detects that the liquid level in the negative pressure evaporation chamber is reduced to a preset third height value, the liquid level monitor controls the liquid outlet pipe 6 to be closed, and the gas exhaust control valve and the liquid inlet pipe 5 to be opened.
Please refer to fig. 4, which is a specific application case of the present invention, and is applied to an open heat source tower 23 of a central air conditioner, and the antifreeze is concentrated by using the concentration technique, so as to prevent the antifreeze from being diluted due to the vapor in the air being melted into the antifreeze, thereby causing the freezing point temperature to move upward, and simultaneously prevent the water and soil pollution caused by the loss of the antifreeze.
The solution 20 concentration device is connected with a heat source tower 23;
an overflow pipe on the upper edge of a water tray of the heat source tower 23 is communicated with a liquid inlet pipe 5, a liquid inlet valve 21 is arranged on the liquid inlet pipe 5, and specifically, the liquid inlet valve 21 is a dilute antifreezing solution overflow electronic valve;
after the dilute antifreeze enters the negative pressure evaporation chamber shell 14 through the dilute antifreeze overflow electronic valve to be concentrated, the liquid outlet valve 24 is opened to flow out, wherein the liquid outlet valve 24 is a concentrated antifreeze electronic valve.
Then the concentrated antifreeze is pumped into the evaporator of the central air conditioning unit by a heat source tower circulating pump 22 to release latent heat to the refrigerant on the other side of the host evaporator;
thereby realizing safe and stable pollution-free operation of the central air-conditioning heat source tower 23.
Second embodiment
Based on the utility model discloses a negative pressure low temperature heat pump type enrichment facility that first embodiment provided, the utility model discloses a second embodiment provides another kind of negative pressure low temperature heat pump type enrichment facility, its difference lies in, take out steam device including the condensation sprayer 11 and the jet circulation pump 10 of interconnect, condensation sprayer 11 with the negative pressure evaporating chamber and evaporimeter 1 all communicates, jet circulation pump 10 with evaporimeter 1 communicates.
The patent of the utility model discloses a realize like this:
when the dilute solution 20 flows into the negative pressure evaporation volume or flows into the dilute solution 20 storage volume and reaches a certain liquid level height;
the liquid level controller will instruct the spray circulation pump to work, and spray the dilute solution 20 to the condenser tube 15 and the condenser tube fins 19 through the solution 20, so as to obtain the latent heat of the refrigerant in the fins 19 and tubes 18 of the condenser 3 to be evaporated;
the water vapor enters the inlet 13 of the vacuum device through the water vapor extraction pipeline 17, and then enters the circulating water tank 8 together with the circulating water cooled to low temperature through the outlet 12 of the vacuum device;
at the moment, the water vapor is condensed and releases latent heat to enable the temperature of circulating water to rise to be above 15 ℃, and the circulating water is sucked into an evaporator 1 of the heat pump unit by a water ring vacuum pump or a jet circulating pump 10 of the vacuumizing device;
after latent heat is released to a refrigerant on the other side of the evaporator 1 by circulating water in the heat pump evaporator 1, the temperature of the circulating water is reduced by more than 15 ℃, and then the circulating water enters a water ring vacuum pump of a vacuum pumping device or a condensation ejector 11;
because the temperature of the circulating water is low, the water vapor can be condensed into liquid water very efficiently, the outlet pressure is greatly reduced, the working compression ratio of the vacuum-pumping device is reduced, the efficiency is greatly improved, and the circulating process of the circulating water is realized.
The refrigerant circulation is that refrigerant in the evaporator 1 is pressed into the condenser 3 by the compressor 2 to release latent heat to circulating water on the other side, then the refrigerant is condensed into liquid refrigerant, and the liquid refrigerant returns to the evaporator 11 again through the throttling device 44 to obtain latent heat of the circulating water, so that the circulation process and the heat transfer process of the refrigerant are repeatedly realized.
One is reverse circulation (circulation of refrigerant) and the other is positive circulation (circulation of circulating water), so that the heat energy bidirectional balanced heat exchange and heat energy cyclic utilization are realized, and the aims of high-efficiency concentration and energy conservation are fulfilled.
The solution 20 in the negative pressure evaporation chamber shell 14 is continuously concentrated through the circulation of circulating water and the circulation of a refrigerant;
when the liquid level in the negative pressure evaporation chamber shell 14 is reduced to a preset height, the operation of the compressor 2 and the circulating pumps can be stopped, the solution 20 in the negative pressure evaporation chamber shell is discharged into a collector through the liquid outlet pipe 6, and the condensed water in the system is discharged into the environment through the overflow pipe 9.
The utility model discloses a principle and method:
the heat of the water tank is transferred into the condenser 3 by utilizing the phase change of the heat pump refrigerant, the latent heat of the refrigerant is exchanged to the dilute solution 20 which needs to be concentrated on the other side of the condenser 3 in a heat exchange mode, so that the enthalpy value of the dilute solution 20 is correspondingly improved, the gas-phase specific capacity of the solution 20 is reduced, then the vapor in the solution 20 gas phase in the condenser 3 (or a negative pressure evaporation chamber) is extracted from the capacity by a vacuum device, the mass transfer and the heat transfer are carried out to the circulating water tank by the vacuum device, and the vacuum device has the function of condensing the vapor.
The machine is characterized in that:
circulating water which is used for condensing water vapor and is cooled to a lower temperature by a cooling medium in the heat pump evaporator 1 can transfer heat released by the circulating water to a concentrated solution through the cooling medium; the most obvious difference between the patent of the utility model and the prior related technology is also the most advantageous part;
and the vacuum device can be a water ring vacuum pump or a condensation ejector 11, which is different from the traditional way of concentrating by adopting a water ring vacuum pump or a traditional condensation ejector. The temperature reduction of the circulating water for the work of the air conditioner is usually realized by adopting a radiator, and even if the air conditioner is adopted for cooling, the temperature reduction is also greatly different from the cooling device;
because the utility model discloses an utilize heat pump set to come the refrigeration cycle water, recycle low temperature circulating water condensation steam to realize the concentrate temperature through heat energy transfer and rise, thereby improve concentration efficiency.
While also recycling the latent heat of water vapor to increase the enthalpy of the concentrated solution 20.
Therefore, the specific volume of the steam is reduced, the cold and the heat are utilized, the heat is not radiated to the environment or the cold is discharged in any mode, only condensed water and no water vapor are discharged, and the effect of bidirectional synergy is achieved.
The above is only the preferred embodiment of the present invention, not limiting the scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A negative pressure low temperature heat pump type concentration device characterized by comprising:
the heat pump unit comprises an evaporator, a condenser, a compressor and a throttling device, wherein the condenser comprises a negative pressure evaporation chamber shell and a condensation pipe, the condensation pipe is arranged in the negative pressure evaporation chamber shell, and the compressor and the throttling device are respectively communicated with two ends of the evaporator and the condensation pipe;
a liquid inlet pipe which is communicated with the negative pressure evaporation chamber shell, and the solution to be concentrated flows into the negative pressure evaporation chamber shell from the liquid inlet pipe;
the water vapor pumping device is used for pumping water vapor and air in the negative pressure evaporation chamber shell so as to realize that the inside of the negative pressure evaporation chamber shell is in a negative pressure vacuum state;
the monitoring element is used for monitoring the liquid level condition of the solution in the negative pressure evaporation chamber shell and starting and closing the heat pump unit and the water pumping device according to the liquid level condition; wherein the condenser tube is used to heat the solution to achieve concentration of the solution within the negative pressure evaporation chamber housing.
2. The negative-pressure low-temperature heat pump type concentrator of claim 1, further comprising a drain in communication with the negative-pressure evaporator chamber housing.
3. The negative-pressure low-temperature heat pump type concentrator of claim 1, wherein the vapor extractor stores a temperature-raising liquid therein, and wherein the vapor extractor is further configured to extract the temperature-raising liquid back to the vapor extractor after the vapor is melted into the temperature-raising liquid.
4. The negative-pressure low-temperature heat pump-type concentrator of claim 3, wherein the moisture extraction device further comprises a tank, the tank communicating the moisture extraction device with the evaporator; when the water vapor is melted into the heating liquid, the water vapor pumping device is also used for inputting the heating liquid into the liquid storage tank, then inputting the heating liquid into the evaporator and finally pumping the heating liquid back to the water vapor pumping device.
5. The negative-pressure, low-temperature, heat pump-type concentrator of claim 4, wherein a heater is disposed in said tank, said heater being configured to heat said warming liquid in said tank.
6. The negative pressure, low temperature heat pump type concentrator of claim 4, wherein said tank is provided with an overflow pipe.
7. The negative pressure, low temperature heat pump-type concentrator of claim 1, wherein the steam pumping device is a water ring vacuum pump.
8. The negative-pressure, low-temperature, heat pump-type concentrator of claim 1, wherein the water vapor withdrawing means comprises a condensate ejector and a spray circulation pump interconnected, the condensate ejector in communication with both the negative-pressure evaporator chamber and the evaporator, the spray circulation pump in communication with the evaporator.
9. The negative-pressure low-temperature heat pump type concentration device according to claim 1, wherein the condenser further comprises a fin, a steam pipe, a shower pipe and a liquid baffle plate, the fin is arranged in the condenser pipe, the steam pipe communicates the negative-pressure evaporating chamber housing and the steam pumping device, and the shower pipe and the liquid baffle plate are suspended in the negative-pressure evaporating chamber housing; wherein, the shower is used for to the condenser pipe and the fin sprays the solution.
10. The negative-pressure low-temperature heat pump type concentrator of claim 2, further comprising a liquid inlet valve and a liquid outlet valve, wherein the liquid inlet valve is disposed in the liquid inlet pipe, and the liquid outlet valve is disposed in the liquid outlet pipe.
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| CN110339584A (en) * | 2019-08-23 | 2019-10-18 | 刘小江 | Negative pressure Low Temperature Thermal pump-type enrichment facility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110339584A (en) * | 2019-08-23 | 2019-10-18 | 刘小江 | Negative pressure Low Temperature Thermal pump-type enrichment facility |
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