CN110624265B - Multistage heating and thermal cycle negative pressure evaporation type solution concentration device - Google Patents
Multistage heating and thermal cycle negative pressure evaporation type solution concentration device Download PDFInfo
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- CN110624265B CN110624265B CN201911028462.3A CN201911028462A CN110624265B CN 110624265 B CN110624265 B CN 110624265B CN 201911028462 A CN201911028462 A CN 201911028462A CN 110624265 B CN110624265 B CN 110624265B
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- pressure evaporation
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- 238000001704 evaporation Methods 0.000 title claims abstract description 145
- 230000008020 evaporation Effects 0.000 title claims abstract description 145
- 238000010438 heat treatment Methods 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 167
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 238000010792 warming Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 238000009833 condensation Methods 0.000 claims abstract description 8
- 230000005494 condensation Effects 0.000 claims abstract description 8
- 239000012141 concentrate Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000000630 rising effect Effects 0.000 claims description 11
- 238000001802 infusion Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000005382 thermal cycling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 238000012546 transfer Methods 0.000 description 8
- 230000002528 anti-freeze Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 235000013305 food Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000009291 secondary effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229930003268 Vitamin C Natural products 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0094—Evaporating with forced circulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a multi-stage heating and thermal circulation negative pressure evaporation type solution concentration device, which comprises: a refrigerant circulation assembly; a warming fluid circulation assembly; the concentrated solution conveying component comprises a negative pressure evaporation chamber, a water ring vacuum pump and an output device; the circulating pump is used for sending the heated heating liquid into the first heat exchanger and then back into the liquid storage tank; the first heat exchanger is used for transferring heat of the heating liquid to the solution to be concentrated, and the water ring vacuum pump is used for pumping the solution into the negative pressure evaporation chamber through the condenser so as to realize that the solution absorbs heat released in the condensation process in the condenser; the water ring vacuum pump is also used for sending water vapor generated by negative pressure evaporation of the solution to be concentrated in the negative pressure evaporation chamber into the liquid storage tank so as to raise the temperature of the heating liquid in the liquid storage tank; the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber. The solution concentration device provided by the invention realizes a high-efficiency low-cost concentration process, and can be widely applied to concentration treatment of solutions in various fields.
Description
Technical Field
The invention relates to the technical field of solution concentration, in particular to a negative pressure evaporation type solution concentration device with multi-stage temperature rise and thermal circulation.
Background
The prior art has many researches on how to fully utilize the heat of secondary steam, namely a multi-effect evaporation mode or a heat pump evaporation mode; the low-temperature concentration technology research is mainly conducted around how to fully utilize the latent heat of secondary steam, prevent the energy waste caused by direct discharge of the latent heat of evaporated steam, reduce the material loss and other related problems.
The multiple effect is to use the secondary steam of the previous effect as the heating source of the next effect, and the temperature of the last effect after condensation can be discharged into the environment by a vacuum pump due to low temperature and pressure. The heat pump evaporation mainly uses secondary steam as a low-temperature heat source, so that part of heat of the secondary steam can be recovered, and the heat pump evaporation is a step greater than the evaporation of the early chemical process. These two forms are often adopted in many chemical fields at present, but the specificity of the evaporation and concentration process of medical foods is not considered.
In the evaporation and concentration operation, the evaporation operation of the heat-sensitive material should be paid attention to, because the heat-sensitive material is denatured when encountering high temperature, such as in the medical and food industry production, the product is mostly not very temperature-resistant, and because the product has biological activity, the evaporation and concentration at high temperature are not suitable, and based on the characteristic, the heat-sensitive material is generally required to be evaporated under the low-temperature working condition.
The existing heat pump type solution concentration technology has the working process that low-temperature steam is compressed by a compressor to increase the temperature and the pressure, the enthalpy is increased, then the steam enters a heat exchanger to be condensed, the latent heat of the steam is fully utilized to heat the concentrated solution, and no steam is discharged in the working operation. In the multi-effect evaporation process, secondary steam with a certain effect of the evaporator cannot be directly used as a local effect heat source, and only is used as a secondary effect or a secondary effect heat source. Such as having to be additionally energized as a source of a heat for this effect, to raise its temperature (pressure). The steam jet pump compresses only a portion of the secondary steam, while the mvr evaporator may compress all of the secondary steam in the evaporator. The solution is circulated in a falling film evaporator through a material circulation pump in a heating pipe. The primary steam is heated by fresh steam outside the tube, the solution is heated and boiled to generate secondary steam, the generated secondary steam is sucked by a turbo-charging fan, the temperature of the secondary steam is increased after being pressurized, and the secondary steam is taken as a heating source to enter a heating chamber for circular evaporation. Normally starting, sucking secondary steam by the turbine compressor, pressurizing and changing the secondary steam into heating steam, and continuously performing circulation evaporation. The evaporated water is finally changed into condensed water and discharged.
For cost reasons, single stage centrifugal compressors and high pressure fans are commonly used in mechanical vapor recompression systems. Centrifugal compressors are therefore volume controlled machines, i.e. the volumetric flow rate remains almost constant no matter how high the suction pressure is. Whereas the change in mass flow is proportional to the suction pressure, which is related to the temperature of the solution concentrated by the vapor, the higher the temperature the greater its pressure and the greater its specific volume.
The lower the steam temperature, the greater its specific volume, e.g., 100 ℃ saturated steam differs from 20 ℃ saturated steam by a factor of about 20. If the water vapor is directly compressed, a large-capacity compressor is required, so that the equipment cost and the operation cost are increased, but the method is uneconomical, and therefore, the refrigerant circulation type heat pump type low-temperature evaporation device is better. In addition, in the evaporation process, because the boiling point of many materials is lower, secondary steam is generated to clamp the materials, and the materials are often very corrosive (vitamin C, fruit acid and the like), if the calcium chloride antifreeze is used for concentrating, the corrosion to equipment is extremely serious, and directly compressing the secondary steam means that the compressor needs to be contacted with the secondary steam containing the highly corrosive materials, so that the compressor can be corroded, and the service life of the compressor is seriously influenced. In the multi-effect low-temperature evaporation, a certain temperature difference is needed between effects, in the multi-effect evaporation, the temperature difference is not less than 12 ℃ to ensure the evaporation intensity of each effect, if the temperature difference is too small, the energy-saving effect of the increased effect number can not resist the heat loss during conveying, and the temperature difference is greatly lost due to the rising of the boiling point caused by the concentration of materials, in the low-temperature evaporation, the temperature of the final effect can be very low, a large vacuum system is needed to maintain a certain vacuum degree, the heat exchange area can be greatly increased even if the temperature difference between the effects is reduced, and the temperature difference can not be very small due to the existence of heat loss, so that the multi-effect evaporation is inapplicable in the low-temperature evaporation, particularly in the evaporation of thermosensitive materials. Multiple effect evaporation is generally used for evaporation above 80 ℃. In addition, since the steam is required to be introduced in the multi-effect evaporation, the cost of the steam is not high with the increase of the energy price, and thus the multi-effect evaporation is not as economical as the heat pump evaporation.
In order to save energy, the volume of the compressor can be reduced, the service life of the compressor can be prolonged, the primary investment can be reduced, the economic benefit can be improved, and the indirect low-temperature heat pump evaporation can be realized.
Low temperature evaporation characteristics: 1. the operation temperature is low, the heat energy consumption is low, and corrosion of equipment can be effectively prevented; 2. the pretreatment requirement on the feed water is reduced, and because the low-temperature evaporation scaling is not serious, the requirement on the easily scaled ions such as calcium, magnesium and the like in the material can be relaxed; 3. the requirements on the heat source are relaxed, and the low-grade heat energy can be utilized; 4. certain heat sensitive materials may be treated. But also has the disadvantages: 1. the heat transfer coefficient is reduced, and the area of the heat exchanger is increased; 2. the high volume of steam during low temperature operation requires a large volume of equipment, increasing equipment investment, and also requires a vacuum pump to maintain a certain vacuum, thus increasing the investment in equipment.
Disclosure of Invention
The invention solves the technical problems of incapability of recycling heat energy, low efficiency and high cost in the prior art by providing a multi-stage temperature rise and thermal cycle negative pressure evaporation type solution concentration device.
In order to solve the technical problems, the invention provides a multi-stage heating and thermal cycle negative pressure evaporation type solution concentration device, which comprises:
The refrigerant circulation assembly comprises an evaporator, a throttling device, a condenser and a compressor which are sequentially connected in a surrounding manner;
the heating liquid circulation assembly comprises a liquid storage tank, a circulating pump, a first heat exchanger and a first heat source; the liquid storage tank, the circulating pump and the first heat exchanger are sequentially connected in a surrounding mode, and the first heat source is arranged in the liquid storage tank;
the concentrated solution conveying assembly comprises a negative pressure evaporation chamber, a water ring vacuum pump and an output device, and the condenser, the negative pressure evaporation chamber, the water ring vacuum pump and the liquid storage tank are sequentially communicated; the output device is communicated with the negative pressure evaporation chamber;
The circulating pump is used for sending the heated heating liquid into the first heat exchanger and then back into the liquid storage tank;
the first heat exchanger is used for transferring heat of the heated heating liquid to a solution to be concentrated, and then the water ring vacuum pump is used for pumping the solution into the negative pressure evaporation chamber through the condenser so as to realize that the solution absorbs heat released in a condensation process in the condenser;
The water ring vacuum pump is also used for enabling the negative pressure evaporation chamber to be in a negative pressure state and sending water vapor generated by negative pressure evaporation of the solution to be concentrated in the negative pressure evaporation chamber into the liquid storage tank so as to raise the temperature of the heating liquid in the liquid storage tank;
the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber.
Preferably, the solution to be concentrated is drawn into the negative pressure evaporation chamber via the condenser after passing directly through the first heat exchanger.
Preferably, the concentrate delivery assembly further comprises a concentrate tank;
the concentrated solution tank is communicated with the first heat exchanger, and the solution to be concentrated is pumped into the negative pressure evaporation chamber through the condenser after flowing through the first heat exchanger from the concentrated solution tank;
or alternatively; the first heat exchanger is arranged in the concentrated solution tank, and after the solution to be concentrated flows into the concentrated solution tank, the solution is pumped into the negative pressure evaporation chamber through the condenser.
Preferably, the concentrated solution conveying assembly further comprises a first control valve and a first liquid level controller, the first control valve is arranged in the concentrated solution tank, the first liquid level controller is arranged in the concentrated solution tank, the solution to be concentrated flows into the concentrated solution tank from the first control valve, the first liquid level controller is used for detecting the liquid level height value of the solution to be concentrated in the concentrated solution tank, and when the liquid level height value reaches a preset height value, the first liquid level controller is further used for controlling the refrigerant circulating assembly, the temperature-rising liquid circulating assembly and the water ring vacuum pump to be started.
Preferably, the concentrate delivery assembly further comprises an auxiliary pump; the auxiliary pump is used for assisting the water ring vacuum pump to pump the solution into the negative pressure evaporation chamber through the condenser;
When the first heat exchanger is arranged in the concentrated solution tank, the auxiliary pump is connected with the concentrated solution tank and the condenser;
When the concentrate tank is in communication with the first heat exchanger, the auxiliary pump connects the first heat exchanger with the condenser.
Preferably, when the concentrate tank is in communication with the first heat exchanger, the concentrate delivery assembly further comprises an infusion set through which the concentrate tank is in communication with the first heat exchanger.
Preferably, the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber to the outside;
Or the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber into the concentrated solution tank.
Preferably, the circulating pump is further used for sending the heated heating liquid to the water ring vacuum pump through the evaporator;
and/or, the warming liquid circulation assembly further comprises a second heat exchanger, and the water ring vacuum pump is communicated with the liquid storage tank through the second heat exchanger;
the circulating pump is also used for conveying the heated heating liquid to the second heat exchanger through the evaporator.
Preferably, the warming liquid circulation assembly further comprises an inflow valve and an inflow valve, wherein the inflow valve is connected with the circulation pump and the evaporator, and the inflow valve is connected with the evaporator and the water ring vacuum pump;
When the temperature rising liquid circulation assembly further comprises a second heat exchanger, the temperature rising liquid circulation assembly further comprises a regulating valve, a drain pipe, a side inlet valve and a side outlet valve, the regulating valve is connected with the evaporator and the second heat exchanger, the drain pipe is communicated with the second heat exchange, the side inlet valve is communicated with the drain pipe and the liquid storage tank, and the side outlet valve is located between the evaporator and the regulating valve and connected with the evaporator.
In order to solve the technical problems, the invention also provides a multi-stage heating and thermal circulation negative pressure evaporation type solution concentration device, which comprises:
The refrigerant circulation assembly comprises an evaporator, a throttling device, a condenser and a compressor which are sequentially connected in a surrounding manner;
The heating liquid circulation assembly comprises a liquid storage tank, a circulating pump, a first heat exchanger, a first heat source and a second heat exchanger; the liquid storage tank, the circulating pump and the first heat exchanger are sequentially connected in a surrounding mode, and the first heat source is arranged in the liquid storage tank;
The concentrated solution conveying assembly comprises a negative pressure evaporation chamber, a water ring vacuum pump and an output device, and the condenser, the negative pressure evaporation chamber, the water ring vacuum pump, the second heat exchanger and the liquid storage tank are sequentially communicated; the output device is communicated with the negative pressure evaporation chamber;
The circulating pump is used for sending the heated heating liquid into the first heat exchanger and then back into the liquid storage tank;
The first heat exchanger is used for transferring the heat of the heated heating liquid to the solution to be concentrated, and then the water ring vacuum pump is used for pumping the solution into the negative pressure evaporation chamber after sequentially feeding the solution into the second heat exchanger and the condenser so as to assist the solution to absorb heat secondarily and heat;
The water ring vacuum pump is also used for enabling the negative pressure evaporation chamber to be in a negative pressure state, and sending water vapor generated by negative pressure evaporation of the solution to be concentrated in the negative pressure evaporation chamber into the liquid storage tank through the second heat exchanger so as to raise the temperature of the heating liquid in the liquid storage tank;
the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber.
In the negative pressure evaporation type solution concentration device with multi-stage temperature rise and thermal circulation, the first heat source is used for heating the temperature rise liquid in the liquid storage tank, and the circulating pump is used for sending the heated temperature rise liquid into the first heat exchanger and then back into the liquid storage tank; the first heat exchanger is used for transferring heat of the heated heating liquid to a solution to be concentrated, and then the water ring vacuum pump is used for pumping the solution into the negative pressure evaporation chamber through the condenser so as to realize that the solution absorbs heat released in a condensation process in the condenser; the water ring vacuum pump is also used for enabling the negative pressure evaporation chamber to be in a negative pressure state and sending water vapor generated by negative pressure evaporation of the solution to be concentrated in the negative pressure evaporation chamber into the liquid storage tank so as to raise the temperature of the heating liquid in the liquid storage tank; the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber. The negative pressure evaporation type solution concentration device provided by the invention heats the solution to be concentrated at least 2 times through the heat circulation of the refrigerant and the heating liquid, improves the concentration efficiency, reduces the concentration heating cost, and realizes the heat energy recycling of a system. The system has three fluids to exchange heat mutually, and finally the water in the solution is discharged out of the circulation system in a low-temperature liquid water mode in the mass transfer and heat transfer process, so that the solution concentration with lower cost is realized.
The solution concentration device provided by the invention realizes a high-efficiency low-cost concentration process, and can be widely applied to sea water desalination, food medicine, sewage treatment, petrochemical engineering and concentration treatment of antifreeze solution of a central air-conditioning heat source tower.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a multi-stage heating and thermal cycling negative pressure evaporative solution concentration device according to the present invention;
FIG. 2 is a schematic diagram of a second embodiment of a multi-stage heating and thermal cycling negative pressure evaporative solution concentration device according to the present invention;
FIG. 3 is a schematic diagram of a third embodiment of a multi-stage heating and thermal cycling negative pressure evaporative solution concentration device according to the present invention;
FIG. 4 is a schematic diagram of a fourth embodiment of a multi-stage heating and thermal cycling negative pressure evaporative solution concentrating device according to the present invention;
Fig. 5 is a schematic design diagram of a fifth embodiment of a multi-stage heating and thermal cycle negative pressure evaporation type solution concentrating apparatus according to the present invention.
Reference numerals illustrate:
the refrigerant circulation assembly comprises a 12-evaporator, a 3-condenser, a 9-throttling device and a 10-compressor;
the heating liquid circulation assembly comprises a 6-first heat exchanger, a 17-liquid storage tank, a 13-circulating pump, a 15-first heat source, an 11-inflow valve, a 20-regulating valve, a 19-second heat exchanger, a 16-drain pipe, an 18-side inlet valve, a 14-side outlet valve and a 21-water inlet valve;
The concentrated solution conveying component comprises a 2-negative pressure evaporation chamber, a 1-water ring vacuum pump, an output device, a 23-auxiliary pump, a 5-concentrated solution tank, a 4-first control valve, a 24-first liquid level controller, an infusion apparatus and a 25-liquid outlet pipe;
7-second control valve, 8-output pump, on-off valve (not shown), 26-input pump.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
The invention provides a multi-stage heating and thermal circulation negative pressure evaporation type solution concentration device.
First embodiment
Referring to fig. 1, the negative pressure evaporation type solution concentration device with multi-stage temperature rising and thermal cycle comprises:
the refrigerant circulation assembly comprises an evaporator 12, a throttling device 9, a condenser 3 and a compressor 10 which are sequentially connected in a surrounding manner;
the warming liquid circulation assembly comprises a liquid storage tank 17, a circulation pump 13, a first heat exchanger 6 and a first heat source 15; the liquid storage tank 17, the circulating pump 13 and the first heat exchanger 6 are sequentially connected in a surrounding manner, and the first heat source 15 is arranged in the liquid storage tank 17;
The concentrated solution conveying assembly comprises a negative pressure evaporation chamber 2, a water ring vacuum pump 1 and an output device, wherein the condenser 3, the negative pressure evaporation chamber 2, the water ring vacuum pump 1 and the liquid storage tank 17 are sequentially communicated; the output device is communicated with the negative pressure evaporation chamber 2;
The first heat source 15 is used for heating the heating liquid in the liquid storage tank 17, and the circulating pump 13 is used for sending the heated heating liquid into the first heat exchanger 6 and then back into the liquid storage tank 17;
The first heat exchanger 6 is used for transferring heat of the heated heating liquid to a solution to be concentrated, and then the water ring vacuum pump 1 is used for pumping the solution into the negative pressure evaporation chamber 2 through the condenser 3 so as to realize that the solution absorbs heat released in a cold condensation process in the condenser 3;
The water ring vacuum pump 1 is further configured to make the negative pressure evaporation chamber 2 in a negative pressure state, and send vapor generated by negative pressure evaporation of a solution to be concentrated in the negative pressure evaporation chamber 2 into the liquid storage tank 17, so as to raise the temperature of the heating liquid in the liquid storage tank 17;
the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2.
In the multi-stage heating and thermal circulation negative pressure evaporation type solution concentration device provided by the invention, the first heat source 15 is used for heating liquid in the liquid storage tank 17, and the circulating pump 13 is used for sending the heated heating liquid into the first heat exchanger 6 and then back into the liquid storage tank 17; the first heat exchanger 6 is used for transferring heat of the heated heating liquid to a solution to be concentrated, and then the water ring vacuum pump 1 is used for pumping the solution into the negative pressure evaporation chamber 2 through the condenser 3 so as to realize that the solution absorbs heat released in a cold condensation process in the condenser 3; the water ring vacuum pump 1 is further configured to make the negative pressure evaporation chamber 2 in a negative pressure state, and send vapor generated by negative pressure evaporation of a solution to be concentrated in the negative pressure evaporation chamber 2 into the liquid storage tank 17, so as to raise the temperature of the heating liquid in the liquid storage tank 17; the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2. The negative pressure evaporation type solution concentration device provided by the invention heats the solution to be concentrated at least 2 times through the heat circulation of the refrigerant and the heating liquid, improves the concentration efficiency, reduces the concentration heating cost, and realizes the heat energy recycling of a system.
In this embodiment, the concentrate delivery assembly may further comprise a concentrate tank 5.
The first heat exchanger 6 is arranged in the concentrated solution tank 5, and after the solution to be concentrated flows into the concentrated solution tank 5, the solution is pumped into the negative pressure evaporation chamber 2 through the condenser 3.
It will be appreciated that in other embodiments, the concentrate delivery assembly may not include the concentrate tank 5. The solution to be concentrated is directly passed through the first heat exchanger 6 and then is pumped into the negative pressure evaporation chamber 2 through the condenser 3.
The concentrated solution conveying assembly further comprises a first control valve 4 and a first liquid level controller 24, the first control valve 4 is arranged in the concentrated solution tank 5, the first liquid level controller 24 is arranged in the concentrated solution tank 5, the solution to be concentrated flows into the concentrated solution tank 5 from the first control valve 4, the first liquid level controller is used for detecting the liquid level height value of the solution to be concentrated in the concentrated solution tank 5, and when the liquid level height value reaches a preset height value, the first liquid level controller 24 is further used for controlling the refrigerant circulation assembly, the temperature-rising liquid circulation assembly and the water ring vacuum pump 1 to be started.
The concentrate delivery assembly further comprises an auxiliary pump 23; the auxiliary pump 23 is used for assisting the water ring vacuum pump 1 to pump the solution into the negative pressure evaporation chamber 2 through the condenser 3; the auxiliary pump 23 connects the concentrate tank 5 with the condenser 3.
The output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2 to the outside. In this embodiment, the output device includes a second control valve 7 and an output pump 8, and the second control valve 7 connects the negative pressure evaporation chamber 2 and the output pump 8.
The circulating pump 13 is also used for sending the heated heating liquid to the water ring vacuum pump 1 through the evaporator 12;
And, the warming fluid circulation assembly further comprises a second heat exchanger 19, and the water ring vacuum pump 13 is communicated with the liquid storage tank 17 through the second heat exchanger 19;
The circulating pump 13 is further configured to send the heated temperature-raising liquid to the second heat exchanger 19 through the evaporator 12.
The warming fluid circulation assembly further comprises an inflow valve 11 and an inflow valve 21, wherein the inflow valve 11 is connected with the circulation pump 13 and the evaporator 12, and the inflow valve 21 is connected with the evaporator 12 and the water ring vacuum pump 1;
the warming fluid circulation assembly further comprises a regulating valve 20, a drain pipe 16, a bypass inlet valve 18 and a bypass outlet valve 14, wherein the regulating valve 20 is connected with the evaporator 12 and the second heat exchanger 19, the drain pipe 16 is communicated with the second heat exchange, the bypass inlet valve 18 is communicated with the drain pipe 16 and the liquid storage tank 17, and the bypass outlet valve 14 is positioned between the evaporator 12 and the regulating valve 20 and is connected with the evaporator 12.
In this embodiment, the flow rate of the solution to be concentrated is very stable.
Second embodiment
Referring to fig. 2, according to the multi-stage heating and thermal cycle negative pressure evaporation type solution concentrating apparatus provided by the first embodiment of the present invention, a second embodiment of the present invention provides another multi-stage heating and thermal cycle negative pressure evaporation type solution concentrating apparatus, which is different in that:
The multi-stage temperature rising and heat circulating negative pressure evaporation type solution concentration device does not comprise the second heat exchanger 19, and the water ring vacuum pump 1 is directly communicated with the liquid storage tank 17. The circulating pump 13 is also used for sending the heated heating liquid to the water ring vacuum pump 1 through the evaporator 12.
The warming fluid circulation assembly further comprises an inflow valve 11, the inflow valve 11 connects the circulation pump 13 with the evaporator 12, and the evaporator 12 is directly communicated with the water ring vacuum pump 1.
In this embodiment, the concentrate delivery assembly may further comprise a concentrate tank 5. The concentrated solution tank 5 is communicated with the first heat exchanger 6, and the solution to be concentrated is pumped into the negative pressure evaporation chamber 2 through the condenser 3 after flowing through the first heat exchanger 6 from the concentrated solution tank 5;
The concentrate delivery assembly further comprises an auxiliary pump 23; the auxiliary pump 23 is used for assisting the water ring vacuum pump 1 to pump the solution into the negative pressure evaporation chamber 2 through the condenser 3; the auxiliary pump 23 connects the first heat exchanger 6 with the condenser 3.
In this embodiment, the concentrate delivery assembly further includes an infusion set, and the concentrate tank 5 is in communication with the first heat exchanger 6 through the infusion set.
As a preferred mode of this embodiment, the infusion apparatus may be an on-off valve, and the concentrate tank 5 may be located above the first heat exchanger 6, and the on-off valve connects the bottom end of the concentrate tank 5 with the first heat exchanger 6.
The circulating pump 13 is also used for sending the heated heating liquid to the water ring vacuum pump 1 through the evaporator 12.
The output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2 into the concentrated solution tank 5. The output device comprises a second control valve 7 and an output pump 8, and the negative pressure evaporation chamber 2, the second control valve 7, the output pump 8 and the concentrate tank 5 are sequentially connected.
Third embodiment
Referring to fig. 3, according to a second embodiment of the present invention, there is provided another multi-stage heating and thermal cycle negative pressure evaporation type solution concentration device, wherein the heating liquid circulation assembly further includes a second heat exchanger 19, and the water ring vacuum pump 13 is communicated with the liquid storage tank 17 through the second heat exchanger 19; the circulating pump 13 is also used for sending the heated heating liquid to the water ring vacuum pump 1 through the evaporator 12; the circulating pump 13 is further configured to send the heated temperature-raising liquid to the second heat exchanger 19 through the evaporator 12.
The warming fluid circulation assembly further comprises an inflow valve 11, a regulating valve 20, a drain pipe 16, a bypass inlet valve 18, a bypass outlet valve 14 and an inlet valve 21, wherein the inflow valve 11 is connected with the circulation pump 13 and the evaporator 12, the regulating valve 20 is connected with the evaporator 12 and the second heat exchanger 19, the drain pipe 16 is communicated with the second heat exchange, the bypass inlet valve 18 is communicated with the drain pipe 16 and the liquid storage tank 17, the bypass outlet valve 14 is positioned between the evaporator 12 and the regulating valve 20 and is connected with the evaporator 12, and the inlet valve 21 is connected with the evaporator 12 and the water ring vacuum pump 1.
The output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2 into the concentrated solution tank 5.
In this embodiment, the working principle of the multi-stage temperature rising and thermal cycle negative pressure evaporation type solution concentration device is as follows:
The solution to be concentrated flows into the concentrated solution tank 5 through the first control valve 4, and when the solution to be concentrated in the concentrated solution tank 5 is accumulated to a preset liquid level, the first liquid level controller 24 instructs the refrigerant circulation assembly, the heating liquid circulation assembly and the water ring vacuum pump 1 to start working.
The solution to be concentrated enters the first heat exchanger 6 through the infusion apparatus to acquire the heat of the warming liquid at the other side.
After the concentrated solution is heated for the first time, the concentrated solution is pressed into the condenser 3 through the solution side outlet of the first heat exchanger 6 by the auxiliary pump 23 to acquire the latent heat of the refrigerant (refrigerant) at the other side of the heat exchanger, and the temperature is further raised.
The refrigerant releases latent heat to the solution and condenses into liquid refrigerant, the liquid refrigerant reenters the evaporator 12 through the throttling device 9 to absorb the latent heat of the heating liquid at the other side of the evaporator 12 for evaporation, the evaporated refrigerant is pressed into the condenser 3 by the compressor 10 again to heat the solution to be concentrated for the second time, and the circulation process of the refrigerant is completed repeatedly.
The solution to be concentrated which is heated up twice is sucked into the negative pressure evaporation chamber 2 for spraying and evaporation under the action of the auxiliary pump 23 and the water ring vacuum pump 1.
The solution after the concentration process is sucked out by the output pump 8 through the first control valve 4, is pumped into the concentrated solution tank 5 to be fully mixed with the solution which is not concentrated in the concentrated solution tank, is sucked into the first heat exchanger 6 again by the auxiliary pump 23, and is pumped into the condenser 3 by the auxiliary pump 23 to obtain the latent heat of the refrigerant to be heated secondarily.
Then, the water is sucked into the negative pressure evaporation chamber 2 by the water ring vacuum pump 1 to realize the processes of negative pressure evaporation and solution concentration, thus completing the circulation process of the concentrated solution.
The circulation pump 13 divides the temperature rising liquid pumped out of the liquid storage tank 17 into two paths, and one path enters the first heat exchanger 6 to heat up and exchange heat for the first time, and then returns to the liquid storage tank 17 again.
The other path enters the evaporator 12 through the inlet valve 11 to release latent heat to the refrigerant at the other side of the evaporator 12, and the temperature-rising liquid after releasing the latent heat flows out of the evaporator 12 and is split into two paths through a pipeline.
A jet of working water enters the water ring vacuum pump 1 through the inlet valve 21 gate to act as a seal.
The other stream enters the second heat exchanger 19 through the regulating valve 20 to condense the water vapor discharged from the water ring vacuum pump 1 at the other side of the heat exchanger.
The bypass outlet valve 14 may be appropriately opened in order to raise the temperature of the warming fluid to avoid waste of heat energy, and the bypass outlet valve 14 is provided at the low-temperature circulation water pipe that exits the evaporator 12.
And the water vapor evaporated from the solution to be concentrated in the negative pressure evaporation is discharged into the second heat exchanger 19 by the water ring vacuum pump 1, and the water vapor is condensed into liquid water by the low temperature rise liquid at the other side of the heat exchanger, and the liquid water enters the liquid storage tank 17 and is fully mixed with the temperature rise liquid.
After the low temperature warming liquid in the second heat exchanger 19 obtains a part of latent heat of water vapor, the water vapor enters a water storage tank or is discharged to the environment through a water discharge pipe 16.
Or a part of the low-temperature heating liquid can be re-introduced into the liquid storage tank 17 through the bypass valve 18, so that the whole circulating water circulation process is realized.
The first heat source 15 may be an electric heating rod and the tank 17 may also have heat from other sources, for example from another condenser 3.
The refrigerant is continuously circulated in the refrigerant circulation assembly, the temperature rising liquid works through the circulation pump 13 to realize the circulation process, the solution to be concentrated realizes the circulation process of the concentrated solution through the output pump 8 and the auxiliary pump 23, and the power assisting of the water ring vacuum pump 1 is not separated, so that the concentrated solution circulation and the concentration process are finally realized.
When the concentration in the concentrate tank 5 is reduced to the preset concentration, the liquid level of the solution in the concentrate tank 5 is reduced and is lower than the preset liquid level height value.
The first liquid level controller 24 instructs the water ring vacuum pump 1, the refrigerant circulation assembly, the warming liquid circulation assembly and the output pump 8 to stop working, and the corresponding valves are closed or opened, so that the concentrated solution flows out of the concentrated solution tank or enters the next process circulation after the concentration task is completed, or the concentrated solution is sucked out by the working pump in the next process circulation, thereby completing the circulation process of the concentrated solution.
In this embodiment, the flow rate of the solution to be concentrated is often changed.
Fourth embodiment
Referring to fig. 4, according to a third embodiment of the present invention, there is provided a multi-stage temperature-rising and heat-cycling negative pressure evaporation type solution concentration device, and a fourth embodiment of the present invention provides another multi-stage temperature-rising and heat-cycling negative pressure evaporation type solution concentration device, wherein the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2 to the outside.
In this embodiment, the flow rate of the solution to be concentrated is relatively stable.
Fifth embodiment
Referring to fig. 5, unlike the multi-stage heating and thermal cycle negative pressure evaporation type solution concentrating apparatus according to the first to fourth embodiments, the fifth embodiment of the present invention provides another multi-stage heating and thermal cycle negative pressure evaporation type solution concentrating apparatus.
The multi-stage temperature rising and heat circulating negative pressure evaporation type solution concentration device comprises:
the refrigerant circulation assembly comprises an evaporator 12, a throttling device 9, a condenser 3 and a compressor 10 which are sequentially connected in a surrounding manner;
the warming liquid circulation assembly comprises a liquid storage tank 17, a circulation pump 13, a first heat exchanger 6, a first heat source 15 and a second heat exchanger 19; the liquid storage tank 17, the circulating pump 13 and the first heat exchanger 6 are sequentially connected in a surrounding manner, and the first heat source 15 is arranged in the liquid storage tank 17;
the concentrated solution conveying assembly comprises a negative pressure evaporation chamber 2, a water ring vacuum pump 1 and an output device, wherein the condenser 3, the negative pressure evaporation chamber 2, the water ring vacuum pump 1, the second heat exchanger 19 and the liquid storage tank 17 are sequentially communicated; the output device is communicated with the negative pressure evaporation chamber 2;
The first heat source 15 is used for heating the heating liquid in the liquid storage tank 17, and the circulating pump 13 is used for sending the heated heating liquid into the first heat exchanger 6 and then back into the liquid storage tank 17;
The first heat exchanger 6 is used for transferring the heat of the heated heating liquid to the solution to be concentrated, and then the water ring vacuum pump 1 is used for pumping the solution into the negative pressure evaporation chamber 2 after sequentially feeding the solution into the second heat exchanger 19 and the condenser 3 so as to assist the solution to absorb heat for three times;
The water ring vacuum pump 1 is further configured to make the negative pressure evaporation chamber 2 in a negative pressure state, and send water vapor generated by negative pressure evaporation of a solution to be concentrated in the negative pressure evaporation chamber 2 into the liquid storage tank 17 through the second heat exchanger 19, so as to raise the temperature of the heating liquid in the liquid storage tank 17;
the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2.
The circulating pump 13 is also used for sending the heated heating liquid to the water ring vacuum pump 1 through the evaporator 12; the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber 2 into the concentrated solution tank 5.
The infusion set is an input pump 26, and the input pump 26 is used for pumping the solution to be concentrated in the concentrate tank 5 into the first heat exchanger 6.
The embodiment is characterized in that the concentrated solution is heated by adopting a three-stage heating mode, the primary heating is that the heated solution is pumped into the first heat exchanger 6 through the circulating pump 13 to heat the concentrated solution with low temperature, and the primary heated solution is pumped into the first heat exchanger 6 through the input pump 26 to exchange heat.
The solution is heated for the first time and then enters the second heat exchanger 19 to acquire the latent heat of the water vapor discharged from the water ring vacuum pump 1.
After the latent heat of the water vapor is obtained, the solution enters the condenser 3 to obtain the latent heat of the refrigerant.
The solution to be concentrated is heated up three times, which is advantageous in reducing the power of the heat pump compressor 10, and the energy efficiency ratio thereof is further improved.
Further, the concentration liquid tank 5 can be provided with a plurality of standby liquid tanks, and the flow rate of the liquid to be concentrated is changed frequently so as to prevent the liquid to be concentrated from overflowing and being wasted.
For example, the heat source tower of the central air conditioner is often changed in the speed at which the antifreeze is diluted due to weather, and the amount of antifreeze overflowed is also often changed, so that a liquid level controller is also required to be arranged in the prepared concentrated solution tank for controlling the start and stop of the water ring vacuum pump 1 and the circulating water pump.
In addition, a liquid level controller is required to be arranged in the negative pressure evaporation chamber 2 and used for controlling the working frequency output by the output pump 8 so as to prevent the air suction of the discharge pump or the insufficient discharge amount; the resulting solution is sucked in by the water ring vacuum pump 1.
The solution pipe flowing out of the negative pressure evaporation chamber 2 may be provided with a check valve, for example, the second control valve 7 may be a check valve to prevent the concentrated solution from being sucked into the water ring vacuum pump 1, and in addition, the prevention of the solution from entering the water ring vacuum pump 1 may be further enhanced, and a solution inflow blocking device may be added at the pipe opening entering the water ring vacuum pump 1.
The invention has the advantages that the heat energy is recycled, the heat energy can be recycled as long as the circulating water is heated to about 45 ℃ and is stored and kept warm, the heat energy can be recycled repeatedly during operation without heating the circulating water, the circulating water heat can be returned to the circulating water again through the latent heat of the water vapor generated in the concentration process after being transferred out through the heat pump, the initial heat is recovered after being transferred out, the recovered heat is transferred out again, and the purpose of efficiently concentrating the solution is achieved through the two-stage heating modes of evaporation and condensation, latent heat absorption and latent heat release and concentrated solution.
The method can be widely applied to concentration of food and medicine lines, sea water desalination, chemical industry field, sewage treatment and central air-conditioning heat source tower antifreeze solution which need to be concentrated.
The invention takes the factors that the specific volume is larger when the steam pressure is too low into consideration, and simultaneously takes the factors that the material loss and the energy waste are increased when the temperature is too high into consideration, and adopts a relatively reasonable compromise scheme under the trade-off of the two factors: the material temperature is controlled between 82 ℃ and 85 ℃, so that the equipment investment cost can be reduced, the efficiency of the concentrated solution can be greatly improved, namely, the concentration temperature between multi-effect evaporation and heat pump refrigerant circulation type heat pump type low-temperature evaporation can be avoided, the heat transfer coefficient is not required to be reduced, the area of a heat exchanger is not required to be enlarged, the specific volume of steam is not too large during operation, the equipment volume is required to be reduced greatly, the equipment investment is reduced, the vacuum degree is not too high, the consumption of electric energy is reduced, and the excessive consumption of heat energy due to the absorption of latent heat during the phase change of the concentrated solution can be avoided.
This is greatly different from the previously filed related utility models and utility models, and the previously filed related concentrated utility models (negative pressure low temperature heat pump type concentrating device, patent No. 201910781092.4, and further utility models No. 201921374643.7) do not consider the relationship between specific steam volume and concentrating efficiency, and only raise the temperature of the concentrated solution once, but cannot reduce the specific steam volume, and consume too much power consumption of the compressor 10. The utility model further improves the efficiency, firstly, the latent heat of water vapor is fed back to a part of the concentrated solution through a heat exchanger to obtain primary temperature rise, then the latent heat of circulating water is transferred to a higher temperature through a heat pump, and the concentrated solution is subjected to secondary temperature rise through a secondary temperature rise condenser 3. Although the prior related utility model patent also has the function of utilizing the water ring vacuum pump 1 to generate vacuum and perform the functions of mass transfer and heat transfer, and also feeds back the latent heat of water vapor by means of the heat pump, the fed-back heat is difficult to meet the higher temperature requirement, even if the temperature reaches the higher temperature, the energy efficiency ratio is low, and the power of the motor of the configured heat pump unit is very high. The utility model is characterized in that the temperature of circulating water is increased in the mass transfer and heat transfer process of a water ring vacuum pump 1, the temperature of the concentrated solution is reduced, a part of circulating water is exchanged to the solution to be concentrated through a heat exchanger by utilizing the temperature difference between the two fluids, and the other part of circulating water is transferred to a higher place through a heat pump and is exchanged to the concentrated solution which is ready to enter a negative pressure evaporation cavity, so that the concentrated solution can reach a more ideal more economical specific volume temperature state through two-stage temperature increase, and the power of a configured heat pump unit can be greatly reduced.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather utilizing equivalent structural changes made in the present invention description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (6)
1. A multi-stage warming and thermal cycling negative pressure evaporative solution concentrating device, comprising: the refrigerant circulation assembly comprises an evaporator, a throttling device, a condenser and a compressor which are sequentially connected in a surrounding manner;
the heating liquid circulation assembly comprises a liquid storage tank, a circulating pump, a first heat exchanger and a first heat source; the liquid storage tank, the circulating pump and the first heat exchanger are sequentially connected in a surrounding mode, and the first heat source is arranged in the liquid storage tank;
the concentrated solution conveying assembly comprises a negative pressure evaporation chamber, a water ring vacuum pump and an output device, and the condenser, the negative pressure evaporation chamber, the water ring vacuum pump and the liquid storage tank are sequentially communicated; the output device is communicated with the negative pressure evaporation chamber;
The circulating pump is used for sending the heated heating liquid into the first heat exchanger and then back into the liquid storage tank;
the first heat exchanger is used for transferring heat of the heated heating liquid to a solution to be concentrated, and then the water ring vacuum pump is used for pumping the solution into the negative pressure evaporation chamber through the condenser so as to realize that the solution absorbs heat released in a condensation process in the condenser;
The water ring vacuum pump is also used for enabling the negative pressure evaporation chamber to be in a negative pressure state and sending water vapor generated by negative pressure evaporation of the solution to be concentrated in the negative pressure evaporation chamber into the liquid storage tank so as to raise the temperature of the heating liquid in the liquid storage tank;
The output device is used for discharging the concentrated solution from the negative pressure evaporation chamber;
The concentrate delivery assembly further comprises a concentrate tank;
the concentrated solution tank is communicated with the first heat exchanger, and the solution to be concentrated is pumped into the negative pressure evaporation chamber through the condenser after flowing through the first heat exchanger from the concentrated solution tank;
or alternatively; the first heat exchanger is arranged in the concentrated solution tank, and after the solution to be concentrated flows into the concentrated solution tank, the solution is pumped into the negative pressure evaporation chamber through the condenser;
The concentrated solution conveying assembly further comprises a first control valve and a first liquid level controller, the first control valve is arranged in the concentrated solution box, the first liquid level controller is arranged in the concentrated solution box, the solution to be concentrated flows into the concentrated solution box from the first control valve, the first liquid level controller is used for detecting the liquid level height value of the solution to be concentrated in the concentrated solution box, and when the liquid level height value reaches a preset height value, the first liquid level controller is further used for controlling the refrigerant circulation assembly, the temperature-rising liquid circulation assembly and the water ring vacuum pump to be started;
The circulating pump is also used for feeding the heated heating liquid into the water ring vacuum pump through the evaporator;
and/or, the warming liquid circulation assembly further comprises a second heat exchanger, and the water ring vacuum pump is communicated with the liquid storage tank through the second heat exchanger;
the circulating pump is also used for conveying the heated heating liquid to the second heat exchanger through the evaporator.
2. The negative pressure evaporative solution concentration device as recited in claim 1, wherein the solution to be concentrated is drawn into said negative pressure evaporative chamber through said condenser after passing directly through said first heat exchanger.
3. The negative pressure evaporative solution concentration device of claim 1, wherein the concentrate delivery assembly further comprises an auxiliary pump; the auxiliary pump is used for assisting the water ring vacuum pump to pump the solution into the negative pressure evaporation chamber through the condenser;
When the first heat exchanger is arranged in the concentrated solution tank, the auxiliary pump is connected with the concentrated solution tank and the condenser;
When the concentrate tank is in communication with the first heat exchanger, the auxiliary pump connects the first heat exchanger with the condenser.
4. The negative pressure evaporative solution concentration device of claim 1, wherein when the concentrate tank is in communication with the first heat exchanger, the concentrate delivery assembly further comprises an infusion set through which the concentrate tank is in communication with the first heat exchanger.
5. The negative pressure evaporation type solution concentrating apparatus according to any one of claims 1, 3, and 4, wherein said output means is for discharging the concentrated solution from said negative pressure evaporation chamber to the outside;
Or the output device is used for discharging the concentrated solution from the negative pressure evaporation chamber into the concentrated solution tank.
6. The negative pressure evaporative solution concentration device of claim 1, wherein the warming fluid circulation assembly further comprises an inflow valve and an inflow valve, the inflow valve connecting the circulation pump and the evaporator, the inflow valve connecting the evaporator and the water ring vacuum pump;
When the temperature rising liquid circulation assembly further comprises a second heat exchanger, the temperature rising liquid circulation assembly further comprises a regulating valve, a drain pipe, a side inlet valve and a side outlet valve, the regulating valve is connected with the evaporator and the second heat exchanger, the drain pipe is communicated with the second heat exchange, the side inlet valve is communicated with the drain pipe and the liquid storage tank, and the side outlet valve is located between the evaporator and the regulating valve and connected with the evaporator.
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| CN112090100A (en) * | 2020-08-05 | 2020-12-18 | 苏州红皮马电子科技有限公司 | Full-automatic aqueous solution concentrator |
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| CN105435480A (en) * | 2015-12-25 | 2016-03-30 | 佛山德众制药机械有限公司 | Vacuum push-pull alcohol concentration system |
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