CN108176067B - Indirect heat cycle evaporation system - Google Patents
Indirect heat cycle evaporation system Download PDFInfo
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- CN108176067B CN108176067B CN201810073842.8A CN201810073842A CN108176067B CN 108176067 B CN108176067 B CN 108176067B CN 201810073842 A CN201810073842 A CN 201810073842A CN 108176067 B CN108176067 B CN 108176067B
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- 238000001704 evaporation Methods 0.000 title claims abstract description 59
- 230000008020 evaporation Effects 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000003507 refrigerant Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 239000011344 liquid material Substances 0.000 claims description 2
- 239000007791 liquid phase Substances 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims description 2
- 239000002360 explosive Substances 0.000 abstract description 8
- 239000002904 solvent Substances 0.000 abstract description 7
- 239000003960 organic solvent Substances 0.000 abstract description 6
- 239000003814 drug Substances 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
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- 230000006870 function Effects 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
- B01D1/0047—Use of fluids in a closed circuit
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- 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
Abstract
The invention discloses an indirect thermal cycle evaporation system, which comprises a feed liquid tank, an evaporation chamber, a feed liquid heater, a hot water heater, a condenser, a separator and a compressor, wherein the feed liquid tank is connected with the evaporation chamber; the feed liquid tank is communicated with the evaporation chamber, the bottom of the feed liquid heater is connected with the evaporation chamber, and the feed liquid heater siphons feed liquid from the evaporation chamber; the hot water heater and the condenser are connected with the compressor, and the refrigerant in the compressor absorbs heat from the condenser and is conveyed to the hot water heater; the hot water heater comprises another heating medium, the heating medium absorbs the heat of the refrigerant, the heating medium is introduced into the feed liquid heater to heat the feed liquid, and the temperature of the heating medium of the hot water heater is constant when the heating medium flows out; the condenser is connected with the separator, and the separator is connected with a vacuum pump and a condensate pump. The device is used for the evaporation and concentration of flammable and explosive organic solvents of the medicine enterprises, and has the advantages of energy conservation, environmental protection, high solvent recovery rate, safety, reliability, stable operation and simple operation compared with the traditional organic solvent concentration equipment of the medicine enterprises.
Description
Technical Field
The invention relates to an evaporation system, in particular to an indirect heat circulation evaporation system.
Background
Energy conservation and environmental protection become the development direction of all mankind. In the pharmaceutical industry of China, how to reduce the operating cost of a pharmaceutical enterprise, reduce the production cost of medicines and improve the market competitiveness of products is the primary objective and is also related to the long-term development of enterprises. At present, the traditional single-effect concentrator equipment is mainly used for evaporation concentration of flammable and explosive organic solvents in pharmaceutical factories, and the traditional single-effect concentrator equipment has high energy consumption and high solvent loss rate. How to develop an evaporation system which has low energy consumption, can concentrate flammable and explosive solution, has high solvent recovery rate, is safe and reliable and runs stably is particularly important. The existing single-effect MVR evaporation device can solve the problems that the traditional method takes steam as a heat source, the evaporation retention time is long, the concentration ratio is low, the evaporation energy consumption and the cost are high, and the like, but if the single-effect MVR evaporation device is used for evaporation concentration of flammable and explosive solvents, unsafe factors exist due to the fact that flammable and explosive solvent steam is in contact with a compressor impeller which runs at a high speed.
In summary, aiming at the defects and shortcomings of the existing single-effect MVR evaporation device, an evaporation system which has low energy consumption and high concentration ratio, can concentrate flammable and explosive solutions, is safe and reliable and runs stably is particularly needed, and the evaporation system is also suitable for evaporation concentration of materials with strong heat sensitivity to solve the problems.
Disclosure of Invention
The invention aims to provide an indirect heat circulation evaporation system which is used for evaporating and concentrating flammable and explosive organic solvents of a medicine enterprise and has the advantages of energy conservation, environmental protection, high solvent recovery rate, safety, reliability, stable operation and simple operation compared with the traditional organic solvent concentration equipment of the medicine enterprise.
In order to realize the purpose of the invention, the invention adopts the following technical scheme: an indirect thermal cycle evaporation system comprises a feed liquid tank, an evaporation chamber, a feed liquid heater, a hot water heater, a condenser, a separator, a feed pump, a discharge pump and a compressor;
-the feed liquid tank is communicated with the evaporation chamber, and the feed pump is connected between the feed liquid tank and the evaporation chamber and is used for feeding liquid to flow to the evaporation chamber;
-the bottom of the feed liquid heater is connected with the evaporation chamber, the feed liquid heater siphons feed liquid from the evaporation chamber, the feed liquid heater heats the feed liquid and introduces the feed liquid into the evaporation chamber to evaporate the feed liquid into steam, the bottom of the feed liquid heater is provided with a liquid outlet for outflow of concentrated liquid, and the liquid outlet is externally connected with a discharge pump;
-the hot water heater and the condenser are connected to a compressor, and refrigerant in the compressor absorbs heat from the condenser and is delivered to the hot water heater;
the hot water heater comprises another heating medium, the heating medium absorbs heat of the refrigerant, the heating medium is introduced into the feed liquid heater to heat the feed liquid, a hot water circulating pump for flowing the heating medium is arranged between the hot water heater and the feed liquid heater, and the temperature of the heating medium of the hot water heater is constant when the heating medium flows out;
-the evaporation chamber comprises a steam outlet connected to a condenser;
the condenser is connected with a separator, the separator is used for separating the liquid material discharged from the condenser into a gas phase and a liquid phase, the separator is connected with a vacuum pump for extracting tail gas, and the separator is also connected with a condensate pump for extracting condensate. Preferably, an expansion valve is provided between the hot water heater and the condenser.
Preferably, hot water heater includes heat exchange tube, feed liquor chamber, play liquid chamber and heat transfer chamber, the feed liquor chamber is connected to the heat exchange tube and goes out the liquid chamber, and the heat transfer chamber is worn to establish by the heat exchange tube, the heat transfer intracavity lasts to lead to there is mobile fluid, its characterized in that: the end part of the heat exchange tube is provided with a temperature driving flow control device, the temperature driving flow control device is positioned in the liquid outlet cavity, the temperature driving flow control device comprises a flow baffle plate, a thermal deformation part, a sleeve and a fixed plate, the flow baffle plate is connected to the bottom of the fixed plate in an overturning manner, one end of the thermal deformation part is fixed to the fixed plate, the other end of the thermal deformation part is provided with a sliding block, the fixed plate is fixed to the inner wall of the sleeve, the sleeve is communicated with the heat exchange tube, the surface of the flow baffle plate is provided; the thermal deformation piece expands and lengthens when being heated, the fixed plate and the sliding block are supported by the thermal deformation piece, the sliding block moves towards the outer side of the liquid outlet cavity, the flow baffle plate is turned towards the outer side and gradually attached to the inner wall of the sleeve, and the section of a flow channel in the sleeve is enlarged; the thermal deformation piece expands and shortens in the case of cold, the thermal deformation piece contracts and pulls the fixed plate and the sliding block inwards, the sliding block moves towards the inner side of the liquid inlet cavity, the flow blocking plate turns towards the inner side and gradually seals the sleeve, and the cross section of a flow channel in the sleeve is reduced.
Preferably, the thermal deformation piece is Z-shaped, the thermal deformation piece comprises two deformation sections and three connecting sections, the deformation sections are alternately connected with the connecting sections, and the deformation sections are made of memory metal which deforms when being heated.
Preferably, an elastic reset piece is arranged at the joint of the flow baffle and the fixed plate, and the elastic reset piece enables the flow baffle to prop up the flow channel in the closed sleeve towards the inner side.
Preferably, the elastic reset piece is a V-shaped spring, two ends of the V-shaped spring are pressed against the inner wall of the sleeve and the wall of the flow baffle plate, the hot water heater is vertically placed, and the liquid inlet cavity is positioned above the liquid outlet cavity.
Preferably, the thermal deformation part further comprises a fixing sleeve, the fixing sleeve is connected with the connecting section, a fixing shaft is arranged at the top of the fixing plate and penetrates through the fixing sleeve, a limiting block for preventing the fixing sleeve from being disengaged is further arranged at the outer end of the fixing shaft, and the fixing sleeve freely slides on the fixing shaft between the limiting block and the fixing plate.
Preferably, the spout is cylindrical spout, and the slider is spherical, still be equipped with the slide-shaft between slider and the thermal deformation piece, the slide-shaft is cylindrical, and the slide-shaft diameter is less than the slider diameter, and the spout opening part still is equipped with the notch that only is used for the slide-shaft to get into, and the interval of notch is less than the diameter of spout.
Compared with the prior art, the indirect heat cycle evaporation system adopting the technical scheme has the following beneficial effects:
firstly, by adopting the indirect thermal cycle evaporation system, the hot water heater is additionally arranged between the condenser and the feed liquid heater, and the feed liquid heater is indirectly heated through the heating medium in the hot water heater, so that the direct contact of the refrigerant in the compressor with the feed liquid heater is avoided, and the feed liquid in the feed liquid heater is softer during heating.
Secondly, hot water is indirectly heated, so that the pollution risk of the refrigerant leakage to the feed liquid is avoided;
in the invention, the heat in the feed liquid heater comes from the condenser, namely the heat required by feed liquid heating comes from the energy generated by condensing and liquefying steam in the condenser, and the whole heat is recycled in the treatment process of the feed liquid, thereby saving energy.
Fourthly, the energy consumption for evaporating the organic solvent is about 30-40% of that of the traditional single-effect concentrator, and the solvent recovery rate is high;
and fifthly, only a small amount of boiler steam and industrial cooling water are used in the process, and national energy conservation and emission reduction are responded.
Drawings
FIG. 1 is a flow chart of the operation of an indirect thermal cycle evaporation system of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a hot water heater according to the present invention;
FIG. 3 is a sectional view of a liquid outlet chamber of the hot water heater according to the present embodiment;
FIG. 4 is a schematic structural diagram of a medium temperature driving flow control device in this embodiment;
FIG. 5 is a schematic structural diagram of a temperature-driven flow control device in this embodiment;
FIG. 6 is a schematic structural view of a thermally deformable member in this embodiment;
fig. 7 is a schematic structural view of the baffle plate in this embodiment;
fig. 8 is a schematic structural diagram (normal state) of the medium temperature driving flow control device in the present embodiment;
fig. 9 is a schematic structural diagram of the temperature-driven flow control device in this embodiment (in a low-temperature state);
fig. 10 is a schematic view showing deformation of the thermal deformation member in this embodiment.
Reference numerals: 10. fixing a sleeve; 11. a deformation section; 12. a connecting section; 13. a slide shaft; 14. a slider; 2. a flow baffle plate; 20. a protrusion; 21. a chute; 22. a notch; 23. a vent hole; 3. a fixing plate; 30. a fixed shaft; 31. a limiting block; 4. a sleeve; 5. a heat exchange pipe; 61. a liquid inlet cavity; 62. a liquid outlet cavity; 71. a liquid inlet; 72. a liquid outlet; 81. a waste heat inlet; 82. a waste heat outlet; 9. a V-shaped spring.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the indirect thermal circulation evaporation system comprises a feed liquid tank, an evaporation chamber, a feed liquid heater, a hot water heater, a condenser, a separator, a screw compressor, a vacuum system and a related process pump, the indirect thermal circulation evaporation system is connected by a PLC system, the PLC system further comprises an automatic alarm device, an automatic recording device and a report providing function, and multifunctional operation and full-automatic operation of the invention are realized.
Feed liquid enters the feed liquid tank through a pipeline 101, a liquid outlet at the bottom of the feed liquid tank is connected with an inlet of a feed pump through a pipeline 102, an outlet of the feed pump is connected with a feed liquid inlet of an evaporation chamber through a pipeline 103, a pneumatic switch valve is arranged on the pipeline 102, a flow meter is arranged on the pipeline 103 to measure the feed amount in real time, and the feed pump controls the feed amount of the feed liquid through a frequency converter in a variable frequency manner.
Feed liquid enters the heater tube array from the bottom of the evaporation chamber through a siphon effect, the feed liquid absorbs heat of hot water in the shell pass of the heater to evaporate under a certain vacuum degree, a large amount of secondary steam generated by evaporation enters a secondary steam inlet on the shell pass of the condenser through a secondary steam outlet on the top of the evaporation chamber through a pipeline 201, the secondary steam and liquid low-temperature refrigerant in the shell pass of the condenser perform heat exchange and then are condensed by the secondary steam and the liquid low-temperature refrigerant in the shell pass of the condenser, and a condensate outlet on the shell pass of the condenser is connected with a condensate top inlet of the separator through.
The condensate flows into the separator through a pipeline 202 in a vacuum state, a condensate outlet at the bottom of the separator is connected with an inlet of a condensate pump through a pipeline 203, and the condensate pump discharges the condensate out of the room through a pipeline 204.
The top of the separator is provided with a vacuum-pumping port which is connected with a vacuum pump through a pipeline 401, the vacuum pump pumps out tail gas non-condensable gas in the system through a pipeline 402, and a manual air breaking valve and a vacuum regulating valve are arranged on the pipeline 401 to regulate the vacuum degree of the system.
The bottom of the feed liquid heater is provided with a discharge port which is connected with the inlet of a discharge pump through a pipeline 104, the discharge pump collects qualified concentrated liquid through a pipeline 105, and the pipeline 105 is provided with an online densimeter and a flowmeter, so that the discharge density and the flow of the concentrated liquid can be detected and controlled in real time.
The exhaust port of the screw compressor is connected with a refrigerant inlet on the shell pass of the hot water heater through a pipeline 301, high-temperature high-pressure gaseous refrigerant discharged by the compressor is condensed into high-temperature high-pressure liquid refrigerant after heat exchange with hot water in a row tube of the hot water heater, a refrigerant outlet on the shell pass of the hot water heater is connected with a liquid inlet end of an expansion valve through a pipeline 302, a liquid outlet end of the expansion valve is connected with a refrigerant inlet on the tube pass of the condenser through a pipeline 303, and the high-temperature high-pressure liquid refrigerant is changed into low-temperature low-pressure liquid refrigerant through the throttling and pressure reducing effects of.
The low temperature and low pressure liquid refrigerant enters the condenser tube side to absorb the heat of the feed liquid secondary steam in the shell side to vaporize, and then enters the suction port of the compressor from the refrigerant outlet on the condenser tube side through the pipeline 304.
The hot water outlet on the hot water heater tube side is connected with the inlet of a hot water circulating pump through a pipeline 501, the outlet of the hot water circulating pump pumps hot water into the hot water inlet on the shell side of the feed liquid heater through a pipeline 502, the hot water and the feed liquid in the tube side are cooled after heat exchange, and the cooled hot water flows into the hot water inlet on the tube side of the hot water heater through a pipeline 503 by the hot water outlet on the upper part of the shell side of the feed liquid heater. The hot water is then heated again by the high-temperature and high-pressure refrigerant, and the cycle is repeated.
The working principle of the invention is as follows:
the flammable and explosive feed liquid is pumped into the evaporation chamber through the feed liquid tank by the feed pump, the feed liquid enters the feed liquid heater tube pass to absorb the heat of shell pass hot water and then is evaporated under a certain vacuum degree, the feed liquid is evaporated to generate a large amount of secondary steam, the secondary steam enters the condenser shell pass to be used for heating a condenser tube pass low-temperature low-pressure liquid refrigerant, the secondary steam is changed into condensate after releasing heat and enters the separator to be collected, and then the condensate is discharged out of the room by the condensate pump, and the top of the separator is connected with the vacuum pump. The high-temperature high-pressure gaseous refrigerant discharged by the screw compressor enters a shell pass of a hot water heater to be used as hot water in a tube pass of the heater, the hot water is used as a heat source to heat feed liquid in the tube pass of a feed liquid heater through a hot water circulating pump, the high-temperature high-pressure gaseous refrigerant is condensed after releasing heat and becomes high-temperature high-pressure liquid refrigerant, then the high-temperature high-pressure gaseous refrigerant is throttled and decompressed by an expansion valve to become low-temperature low-pressure liquid refrigerant, and the low-temperature low-pressure liquid refrigerant enters a tube pass of a condenser. The whole heating system is closed, the energy loss is very little, and only the part of energy required by the low-temperature low-pressure gaseous refrigerant vapor which is compressed by the compressor and then is changed into the high-temperature high-pressure gaseous refrigerant is required to be provided.
The hot water heater shown in fig. 2 to 10 comprises a heat exchange tube 5, a liquid inlet cavity 61, a liquid outlet cavity 62 and a heat exchange cavity, wherein the heat exchange tube 5 is connected with the liquid inlet cavity 61 and the liquid outlet cavity 62, the heat exchange tube 5 penetrates through the heat exchange cavity, flowing hot fluid continuously flows in the heat exchange cavity, a temperature-driven flow control device is arranged at the end part of the heat exchange tube 5 and is located in the liquid outlet cavity 62, the temperature-driven flow control device comprises a flow baffle plate 2, a thermal deformation piece, a sleeve 4 and a fixing plate 3, the flow baffle plate 2 is connected to the bottom of the fixing plate 3 in an overturning manner, one end of the thermal deformation piece is fixed on the fixing plate 3, a slide block 14 is arranged at the other end of the thermal deformation piece, the fixing plate 3 is fixed on the inner wall.
As shown in fig. 5 and 6, the thermal deformation member is Z-shaped, the thermal deformation member includes two deformation sections 11 and three connection sections 12, the deformation sections 11 are alternately connected with the connection sections 12, in this embodiment, the deformation sections 11 are made of memory metal that deforms when exposed to heat, and the connection sections 12 are made of common copper plate or other corrosion-resistant steel.
Aim at is through increasing the quantity of deformation section 11, increases the node of deformation for two deformation sections 11 become the linearity by the arc, can be so that the deformation increase of whole thermal deformation spare, produce the deformation of great length. As shown in fig. 5, in the deformation process, the sliding block 14 moves in the sliding slot 21, if the top of the thermal deformation element is fixed, it is easy to distort, and internal stress is generated, which causes permanent deformation (unable to recover) of the thermal deformation element, therefore, in order to reduce the distortion of the thermal deformation element, the thermal deformation element further includes a fixing sleeve 10, the fixing sleeve 10 is connected with the connecting section 12, the top of the fixing plate 3 is provided with a fixing shaft 30, the fixing shaft 30 is inserted into the fixing sleeve 10, the outer end of the fixing shaft 30 is further provided with a limiting block 31 for preventing the fixing sleeve 10 from coming off, the fixing sleeve 10 freely slides on the fixing shaft 30 between the limiting block 31 and the fixing plate 3, when the sliding block 14 moves, the whole thermal deformation element is in a movable state, and the top and. As shown in fig. 6 and 7, the sliding groove 21 is a cylindrical sliding groove 21, the sliding block 14 is spherical, a sliding shaft 13 is further arranged between the sliding block 14 and the thermal deformation member, the sliding shaft 13 is cylindrical, the diameter of the sliding shaft 13 is smaller than that of the sliding block 14, notches 22 only used for the sliding shaft 13 to enter are further arranged at the opening of the sliding groove 21, and the distance between the notches 22 is smaller than that of the sliding groove 21. The notch 22 clamps the sliding block 14 tightly, so that the thermal deformation member can drive the baffle plate 2 to turn over in the process of extension and shortening, and the sliding block 14 is effectively prevented from falling out of the sliding groove 21.
In this embodiment, the flow baffle 2 is provided with the drain hole 23 for continuous fluid circulation, so as to prevent the flow baffle 2 from closing the inner wall of the sleeve 4, which results in too low flow rate in the sleeve, and therefore, the drain hole 23 is provided to ensure the flow of cold fluid in the heat exchange tube 5, and the flow baffle 2 only plays a role of reducing the flow rate when closed, rather than closing the flow of cold fluid.
As shown in figure 4, the sleeve 4 is detachably connected with the heat exchange tube 5 through threads, the whole assembly of the temperature driving and flow control device can be completed outside, the assembly is more convenient, the sleeve can be installed at the bottom of the heat exchange tube through the threads after the assembly is finished, and the maintenance and the replacement are also more convenient.
As shown in fig. 3, the heat exchange tube 5 exceeds the heat exchange cavity and enters the liquid outlet cavity 62, the temperature driving flow control device is located in the middle of the liquid outlet cavity 62, an interval of more than 10cm is reserved between the temperature driving flow control device and the heat exchange cavity, the temperature in the heat exchange cavity is prevented from being conducted to the sleeve 4 through the heat exchange tube 5 by controlling the distance of more than 10cm, the problem that the temperature contacted by a thermal deformation part is cold fluid after heating is solved, the temperature is not transferred from a waste heat inlet 81 in the heat exchange cavity through the tube wall, and the accuracy of control is guaranteed.
As shown in fig. 8 and 9, a V-shaped spring is disposed at the joint of the flow baffle 2 and the fixed plate 3, the elastic restoring member causes the flow baffle 2 to inwardly support and close the flow channel in the sleeve 4, and both ends of the V-shaped spring are pressed against the inner wall of the sleeve 4 and the wall of the flow baffle 2.
As shown in fig. 2, the hot water heater in this embodiment is vertically disposed, a certain water pressure is provided above the heat exchange tube 5, the liquid inlet chamber 61 is located above the liquid outlet chamber 62, the purpose of this embodiment is to utilize the residual heat in the heat exchange chamber as much as possible, so that the baffle plate 2 is in the shape of fig. 8 under normal conditions, and the flow of the downward pressure forces the baffle plate 2 to be in the opened state under normal conditions; the thermal deformation member is not in a working state, the thermal deformation member is straightened, the V-shaped spring 9 is in a natural compressed state due to the natural downward pressure of the water pressure, the thermal deformation member only needs to provide a little deformation elastic force to compress the V-shaped spring 9, the memory metal only provides a little elastic force, and the thermal deformation member is in an extension state (b) in fig. 10 under a normal condition.
When the temperature of the cold fluid is reduced, the deformation section 11 contracts inwards, the contraction state of (a) is changed from (b), the sliding block 14 does not push out the sliding groove 21 downwards any more, the flow baffle plate 2 is upwards supported under the action of the V-shaped spring 9, the flowing channel in the sleeve 4 is closed, only partial gaps and the drainage hole 23 are left for water to slowly pass through, so that the retention time of the water in the heat exchange tube 5 is increased, the heating time is prolonged, the temperature of the water is increased, and the heat in the residual heat is utilized to the maximum extent.
The above description of the preferred embodiments of the present invention is provided to enable those skilled in the art to make various changes and modifications without departing from the spirit of the present invention, and these changes and modifications should be construed as being included in the scope of the present invention.
Claims (6)
1. An indirect heat cycle evaporation system which characterized in that: comprises a feed liquid tank, an evaporation chamber, a feed liquid heater, a hot water heater, a condenser, a separator, a feed pump, a discharge pump and a compressor;
-the feed liquid tank is communicated with the evaporation chamber, and the feed pump is connected between the feed liquid tank and the evaporation chamber and is used for feeding liquid to flow to the evaporation chamber;
-the bottom of the feed liquid heater is connected with the evaporation chamber, the feed liquid heater siphons feed liquid from the evaporation chamber, the feed liquid heater heats the feed liquid and introduces the feed liquid into the evaporation chamber to evaporate the feed liquid into steam, the bottom of the feed liquid heater is provided with a liquid outlet for outflow of concentrated liquid, and the liquid outlet is externally connected with a discharge pump;
-the hot water heater and the condenser are connected to a compressor, and refrigerant in the compressor absorbs heat from the condenser and is delivered to the hot water heater;
the hot water heater comprises another heating medium, the heating medium absorbs heat of the refrigerant, the heating medium is introduced into the feed liquid heater to heat the feed liquid, a hot water circulating pump for flowing the heating medium is arranged between the hot water heater and the feed liquid heater, and the temperature of the heating medium of the hot water heater is constant when the heating medium flows out;
-the evaporation chamber comprises a steam outlet connected to a condenser;
the condenser is connected to a separator, the separator is used for separating the liquid material from the condenser into a gas phase and a liquid phase, the separator is connected to a vacuum pump for pumping the tail gas, and the separator is further connected to a condensate pump for pumping the condensate; an expansion valve is arranged between the hot water heater and the condenser;
the hot water heater includes heat exchange tube (5), feed liquor chamber (61), goes out liquid chamber (62) and heat transfer chamber, feed liquor chamber (61) and play liquid chamber (62) are connected in heat exchange tube (5), and the heat transfer chamber is worn to establish in heat exchange tube (5), the heat transfer intracavity lasts to lead to and has flowing fluid, its characterized in that: the end part of the heat exchange tube (5) is provided with a temperature driving flow control device, the temperature driving flow control device is positioned in the liquid outlet cavity (62), the temperature driving flow control device comprises a flow baffle plate (2), a thermal deformation part, a sleeve (4) and a fixing plate (3), the flow baffle plate (2) is connected to the bottom of the fixing plate (3) in an overturning manner, one end of the thermal deformation part is fixed to the fixing plate (3), the other end of the thermal deformation part is provided with a sliding block (14), the fixing plate (3) is fixed to the inner wall of the sleeve (4), the sleeve (4) is communicated with the heat exchange tube (5), the surface of the flow baffle plate (2) is provided with a sliding groove (21), and the sliding block (;
the thermal deformation piece expands and lengthens when being heated, the thermal deformation piece supports the fixed plate (3) and the sliding block (14), the sliding block (14) moves towards the outer side of the liquid outlet cavity (62), the flow baffle plate (2) is turned towards the outer side and gradually attached to the inner wall of the sleeve (4), and the section of a flow channel in the sleeve (4) is enlarged;
the thermal deformation piece expands and shortens when meeting cold, the thermal deformation piece contracts and inwards pulls the fixed plate (3) and the sliding block (14), the sliding block (14) moves towards the inner side where the liquid inlet cavity (61) is located, the flow baffle plate (2) overturns towards the inner side and gradually seals the sleeve (4), and the cross section of a flow channel in the sleeve (4) is reduced.
2. The indirect-type thermal cycle evaporation system of claim 1, wherein: the thermal deformation piece is Z-shaped, the thermal deformation piece comprises two deformation sections (11) and three connecting sections (12), the deformation sections (11) are alternately connected with the connecting sections (12), and the deformation sections (11) are made of memory metal which deforms when heated.
3. The indirect-type thermal cycle evaporation system of claim 2, wherein: the connection part of the flow baffle (2) and the fixed plate (3) is provided with an elastic reset piece, and the elastic reset piece enables the flow baffle (2) to prop up the flow channel in the closed sleeve (4) towards the inner side.
4. The indirect-type thermal cycle evaporation system of claim 3, wherein: the elastic reset piece is a V-shaped spring, two ends of the V-shaped spring are pressed against the inner wall of the sleeve (4) and the wall of the flow baffle plate (2), the hot water heater is vertically placed, and the liquid inlet cavity (61) is located above the liquid outlet cavity (62).
5. The indirect-type thermal cycle evaporation system of claim 4, wherein: the thermal deformation piece still includes fixed cover (10), and fixed cover (10) are connected with linkage segment (12), fixed plate (3) top is equipped with fixed axle (30), fixed axle (30) are worn to locate in fixed cover (10), fixed axle (30) outer end still is equipped with stopper (31) that prevent fixed cover (10) and deviate from, fixed cover (10) freely slides on fixed axle (30) between stopper (31) and fixed plate (3).
6. The indirect-type thermal cycle evaporation system of claim 5, wherein: the sliding groove (21) is a cylindrical sliding groove (21), the sliding block (14) is spherical, a sliding shaft (13) is further arranged between the sliding block (14) and the thermal deformation piece, the sliding shaft (13) is cylindrical, the diameter of the sliding shaft (13) is smaller than that of the sliding block (14), a notch (22) only used for the sliding shaft (13) to enter is further formed in an opening of the sliding groove (21), and the distance between the notches (22) is smaller than that of the sliding groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073842.8A CN108176067B (en) | 2018-01-25 | 2018-01-25 | Indirect heat cycle evaporation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073842.8A CN108176067B (en) | 2018-01-25 | 2018-01-25 | Indirect heat cycle evaporation system |
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| CN112316451B (en) * | 2020-09-22 | 2022-07-22 | 蓝旺节能科技（浙江）有限公司 | Pure electric evaporation module assembly of alcohol group |
| CN112316450B (en) * | 2020-09-22 | 2022-07-15 | 蓝旺节能科技（浙江）有限公司 | High-efficient circulation vaporization system of traditional chinese medicine processing |
| CN113833762B (en) * | 2021-09-08 | 2024-04-19 | 青岛海尔空调电子有限公司 | Air supply system and refrigerating system for suspension bearing |
| CN117138368B (en) * | 2023-10-31 | 2024-01-30 | 江苏科诚节能科技有限公司 | Energy-saving type circulating evaporation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279692A (en) * | 1978-07-05 | 1981-07-21 | Hitachi, Ltd. | Rotary vane type evaporator |
| CN201231077Y (en) * | 2008-07-17 | 2009-05-06 | 常熟市春来机械有限公司 | Inlet and outlet device of centrifugal film evaporator |
| CN207126144U (en) * | 2017-08-01 | 2018-03-23 | 蓝旺节能科技（浙江）有限公司 | A kind of indirect type thermal cycle vapo(u)rization system |
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2018
- 2018-01-25 CN CN201810073842.8A patent/CN108176067B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279692A (en) * | 1978-07-05 | 1981-07-21 | Hitachi, Ltd. | Rotary vane type evaporator |
| CN201231077Y (en) * | 2008-07-17 | 2009-05-06 | 常熟市春来机械有限公司 | Inlet and outlet device of centrifugal film evaporator |
| CN207126144U (en) * | 2017-08-01 | 2018-03-23 | 蓝旺节能科技（浙江）有限公司 | A kind of indirect type thermal cycle vapo(u)rization system |
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