CN114146435A - Secondary separator and MVR forced circulation system - Google Patents
Secondary separator and MVR forced circulation system Download PDFInfo
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- CN114146435A CN114146435A CN202111487549.4A CN202111487549A CN114146435A CN 114146435 A CN114146435 A CN 114146435A CN 202111487549 A CN202111487549 A CN 202111487549A CN 114146435 A CN114146435 A CN 114146435A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000002425 crystallisation Methods 0.000 claims abstract description 26
- 230000008025 crystallization Effects 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 15
- 239000012452 mother liquor Substances 0.000 claims abstract description 11
- 239000007791 liquid phase Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910000885 Dual-phase steel Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 claims 1
- 230000002528 anti-freeze Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 20
- 150000003839 salts Chemical class 0.000 abstract description 14
- 239000013078 crystal Substances 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 59
- 239000012071 phase Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
-
- 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
- B01D1/305—Demister (vapour-liquid separation)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The scheme provides a secondary separator, desalted water from a tower kettle enters a tower kettle body through a desalted water inlet to a liquid outlet and is sent to a nozzle of a spraying device, and the spraying water sprayed by the nozzle washes out soluble particles, such as salt particles, carried in a gas phase. And returning and conveying part of the washing water to a water inlet of the spraying equipment, and conveying the other part of the washing water to a mother liquor tank of the forced circulation system. And secondary steam from the crystallization separator enters the tower kettle body from a gas inlet, and is discharged to a forced circulation compressor from a gas outlet after soluble particles carried in a gas phase are washed away by spraying water sprayed from a nozzle. The improved secondary separator washes away crystal salt particles carried in the gas phase, and washing water is sent to the mother liquid tank, so that the problems of reduction of air inflow of a compressor and surging caused by blockage of a defoaming net due to solid particles are solved. The scheme also provides an MVR forced circulation system with the secondary separator.
Description
Technical Field
The invention belongs to the technical field of secondary separators, and particularly relates to a secondary separator and an MVR forced circulation system.
Background
The forced circulation system of MVR (mechanical vapor recompression) is a system for further evaporating and concentrating the brine after the first-effect and second-effect concentration, the brine of the system reaches a saturated state, so that the gas phase in the evaporation separator is easy to entrain crystallized salt to enter the following equipment.
The salt deposition phenomenon exists in a defoaming net of a secondary separator (SE9830) of the forced circulation system of the MVR, the air inflow of a compressor is influenced, the compressor is unstable to operate, the compressor can surge can be caused in serious conditions, and the operation of the whole MVR system is influenced;
in addition, the compressor is frequently stopped for washing the defoaming net within a period of time, and the long-period operation of the forced circulation system is influenced.
Therefore, how to overcome the above technical defects is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a secondary separator and an MVR forced circulation system, which are used for removing solid particles entering a gas phase of a compressor and avoiding the problems of reduction of air inflow and surging of the compressor caused by blockage of a defoaming net due to the solid particles.
In order to solve the technical problem, the invention provides a secondary separator which comprises a tower kettle body, a defoaming net and spraying equipment,
the tower kettle body is provided with a gas inlet, a gas outlet, a liquid outlet and a desalted water inlet, the nozzle of the spraying equipment and the defoaming net are arranged in the inner cavity of the tower kettle body, and the gas inlet and the nozzle are both positioned above the defoaming net,
the gas inlet is used for being communicated with the crystallization separator, the gas outlet is used for being communicated with the forced circulation compressor, the desalted water inlet is used for introducing desalted water, and the liquid outlet is used for being communicated with the water inlet of the spraying device and the mother liquor tank respectively.
Optionally, the device further comprises a circulating pump, and the liquid outlet is connected with the circulating pump in series.
Optionally, the circulation pump is made of dual-phase steel.
Optionally, the washing machine further comprises a detection device for detecting the conductivity or solid content of the washing water discharged from the liquid discharge port.
Optionally, the system further comprises an antifreezing tube bundle for heating the liquid phase in the tower kettle body.
Optionally, the tower still body comprises a first tower body and a second tower body, the bottom of the first tower body is connected with the second tower body,
the top of the first tower body is provided with the gas inlet, the middle part is provided with the nozzle of the spraying equipment, the bottom of the first tower body extends into the middle part of the second tower body,
the top side of the second tower body is provided with the gas outlet, the middle part of the second tower body is higher than the bottom surface of the first tower body and is provided with the defoaming net, and the bottom surface of the second tower body is provided with the liquid outlet.
Optionally, the liquid phase temperature in the column bottom body in the startup state is 92-95 ℃.
Optionally, the gas outlet is at least 50cm higher than the liquid level of the desalted water in the tower body.
The invention also provides an MVR forced circulation system, which comprises a crystallization separator, a second forced circulation evaporator, a first forced circulation evaporator, a forced circulation pump, a forced circulation compressor and a secondary separator as described above,
the outlet of the forced circulation pump is communicated with the inlet of a liquid channel of the first forced circulation evaporator, the outlet of the liquid channel of the first forced circulation evaporator is communicated with the inlet of a liquid channel of the crystallization separator, the outlet of the liquid channel of the crystallization separator is communicated with the inlet of a liquid channel of the second forced circulation evaporator, the outlet of the liquid channel of the second forced circulation evaporator is communicated with the inlet of the forced circulation pump, and the inlet of the forced circulation pump is also communicated with the feeding hole;
and a gas outlet of the crystallization separator is communicated with a gas inlet of the secondary separator, a gas outlet of the secondary separator is communicated with a gas inlet of the forced circulation compressor, a gas outlet of the forced circulation compressor is communicated with a gas channel inlet of the first forced circulation evaporator, a gas channel outlet of the first forced circulation evaporator is communicated with a gas channel inlet of the second forced circulation evaporator, and a gas channel outlet of the second forced circulation evaporator is communicated with a gas inlet of the crystallization separator.
Optionally, the crystallization separator is provided with a discharge pump.
The secondary separator provided by the invention has the following beneficial effects:
the improved secondary separator not only has the function of intercepting solid impurities by the defoaming net, but also has the function of gas washing. Desalted water from the tower kettle enters the tower kettle body through a desalted water inlet to a liquid outlet and is sent to a nozzle of a spraying device, and soluble particles such as salt particles carried in gas phase are washed away by the spraying water sprayed from the nozzle. One part of generated washing water is returned and conveyed to a water inlet of the spraying device, and the other part of the generated washing water is conveyed to a mother liquor tank of the forced circulation system, so that the environment pollution caused by the discharge of salt-containing water is avoided, and on the other hand, the concentration of salt in the mother liquor tank can be diluted by the part of the water. And secondary steam from the crystallization separator enters the tower kettle body from a gas inlet, and is discharged to a forced circulation compressor from a gas outlet after soluble particles carried in a gas phase are washed away by spraying water sprayed from a nozzle.
The improved secondary separator washes away crystal salt particles carried in the gas phase, and washing water is sent to the mother liquid tank, so that the problems of reduction of air inflow of a compressor and surging caused by blockage of a defoaming net due to solid particles are solved.
The MVR forced circulation system provided by the invention is provided with the secondary separator, so that the MVR forced circulation system also has the beneficial effects, and the details are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a secondary separator in the prior art provided in the present application;
FIG. 2 is a schematic structural diagram of a secondary separator provided in the present invention;
FIG. 3 is a schematic view of a forced MVR circulation system provided by the present invention.
In the upper diagram:
1-a secondary separator; 101-a tower kettle body; 102-a defoaming net; 103-a circulation pump; 104-spraying equipment; 105-a gas inlet; 106-gas outlet; 107-desalted water inlet; 108-drain port; 109-anti-freezing tube bundle; 2-a crystal separator; 3-a second forced circulation evaporator; 4-a first forced circulation evaporator; 5-a discharge pump; 6-forced circulation pump; 7-forced circulation compressor; 8-mother liquor tank.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is more than two, if there are first and second described for the purpose of distinguishing technical features, but not for indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The core of the invention is to provide a secondary separator and an MVR forced circulation system, which can remove solid particles entering the gas phase of the compressor and avoid the problems of reduction of the air input of the compressor and surge caused by blockage of a defoaming net caused by the solid particles.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2-3, fig. 2 is a schematic structural diagram of a secondary separator according to the present invention; FIG. 3 is a schematic view of a forced MVR circulation system provided by the present invention.
The invention provides a secondary separator which comprises a tower kettle body 101, a defoaming net 102 and a spraying device 104.
The tower bottom body 101 is provided with a gas inlet 105, a gas outlet 106, a liquid outlet 108 and a desalted water inlet 107, the spray nozzle of the spray device 104 and the defoaming net 102 are arranged in the inner cavity of the tower bottom body 101, and the gas inlet 105 and the spray nozzle are both positioned above the defoaming net 102.
The gas inlet 105 is used for being communicated with the crystallization separator 2, the gas outlet 106 is used for being communicated with the forced circulation compressor 7, the desalted water inlet 107 is used for introducing desalted water as liquid phase supplement, and the liquid outlet 108 is used for being communicated with the water inlet of the spraying device 104 and the mother liquor tank 8 respectively.
It should be noted that the improved secondary separator 1 not only has the function of intercepting solid impurities by the demister 102, but also has the function of scrubbing.
The liquid phase flow conditions are specifically: desalted water from the tower kettle enters the tower kettle body 101 through a desalted water inlet 107, falls to the bottom under the action of gravity, is discharged from a liquid outlet 108, and is sent to a nozzle of the spraying device 104 for cleaning secondary steam, and spraying water sprayed by the nozzle is used for cleaning soluble particles carried in gas phase, such as salt particles (ammonia, hydrogen chloride and other gases and impurities in steam with corrosive and irritating odor are absorbed and taken away by cleaning liquid). The further washing water that produces also falls to the bottom under the action of gravity, is discharged by leakage fluid dram 108, and wherein, partly washing water returns and carries to the water inlet of spraying equipment, and another part is sent to the mother liquor jar of forced circulation system, has avoided on one hand that the salt water is discharged outward and is caused environmental pollution, and on the other hand can use this part of water to dilute the concentration of salt in the mother liquor jar.
The gas phase flow conditions are specifically: the secondary steam from the crystallization separator 2 enters the tower body 101 through the gas inlet 105, moves downwards and passes through the spray water sprayed from the nozzle, washes off soluble particles carried in the gas phase, moves upwards and removes small droplets carried by the secondary steam through the demister 102, and then is deflected to the gas outlet 106 and discharged to the forced circulation compressor 7.
The secondary separator provided by the scheme washes away crystal salt particles carried in a gas phase, and washing water is sent to the mother liquor tank, so that the problems that the air input of a compressor is reduced and surging occurs due to blockage of a defoaming net caused by solid particles are solved.
In a specific embodiment, as shown in fig. 3, the tower kettle body 101 comprises a first tower body and a second tower body, wherein the bottom of the first tower body is connected with the second tower body.
The top of the first tower body is contracted and conical, and the middle part and the bottom of the first tower body are cylindrical.
The top of the second tower body is similar to the first tower body, and is contracted and conical, the middle part of the second tower body is cylindrical, and the bottom of the second tower body is inverted conical.
The top of the first tower body is provided with a gas inlet 105, the middle part is provided with a nozzle of a spraying device 104, and the bottom of the first tower body extends into the middle part of the second tower body for a distance.
The top side of the second tower body is provided with a gas outlet 106, the middle part of the second tower body is higher than the bottom surface of the first tower body and is provided with a defoaming net 102, and the bottom surface of the second tower body is provided with a liquid outlet 108.
The number of the nozzles of the spraying device 104 may be multiple, each nozzle is provided with one corresponding spray pipe, and specifically, the spray pipes are arranged in parallel in the height direction. The spray pipe is connected in tower cauldron body 101 and goes deep into the inside of tower cauldron body 101, and the spray pipe passes through interface flange and is connected with tower cauldron body 101, the dismouting of being convenient for. As shown in fig. 3, the number of the nozzles is four, the nozzles are sequentially arranged along the direction from the top to the bottom of the tower kettle body 101, one end of each nozzle penetrating into the tower kettle body 101 is provided with a nozzle, and the other end is connected with the spraying equipment body.
In a preferred embodiment, the secondary separator further includes a circulation pump 103, and the liquid outlet 108 is connected in series with the circulation pump 103. The inlet of the circulating pump 103 is communicated with a liquid outlet 108, one path of the outlet is used for producing the mother liquor tank, and the other path is used for washing the gas phase pipe incoming gas through the nozzle. The desalted water in the tower kettle is pressurized by a circulating pump and then is sent to a nozzle of an inlet pipeline of the tower kettle body 101.
Particularly, the circulating pump 103 is made of dual-phase steel, and other materials can be selected, and the dual-phase steel 2507 and other materials can effectively prevent the corrosion influence of equipment and pipelines.
After the system operates for a period of time, the liquid phase is analyzed at regular time, the conductivity of the liquid phase is analyzed, the washing effect is prevented from being reduced due to overhigh salt concentration, and the washing water is replaced at regular intervals. To facilitate confirmation of the need for replacement of the wash water, the wash water may be analyzed for conductivity or solids content on time.
Specifically, a drain outlet 108 of the column bottom body 101 may be provided with a drain outlet, and the drain outlet 108 may detect whether the conductivity or solid content of the washing water discharged from the drain outlet 108 reaches the standard through a detection device. In particular, a hand-held conductivity meter may be used to test conductivity or a sample may be sent to an analysis chamber to detect conductivity or solids content.
In an embodiment, the present disclosure further includes an anti-freezing tube bundle 109 for heating the liquid phase in the tower body 101, which may be disposed at a lower portion of the tower body 1. External steam can be introduced into the system, the steam is only used for heating a liquid phase during starting, the system is in a closed state during running, and the anti-freezing effect of a pipeline is considered in winter to increase electric tracing heat.
In the preferred embodiment, when the forced circulation compressor 7 is in the on state, the temperature of the liquid phase in the column bottom body 101 is high enough to prevent the gas phase from liquefying due to low temperature and affecting the air input of the compressor, which may be 92-95 ℃.
In the embodiment, the liquid level of the desalted water in the tank body 1 is kept sufficiently distant from the gas phase nozzle (i.e., gas outlet 106) to prevent the liquid phase from being carried into the compressor. Preferably, the spacing should be in the range of 50CM or more.
In addition, the present embodiment also provides a forced circulation system of MVR, comprising a crystallization separator 2, a second forced circulation evaporator 3, a first forced circulation evaporator 4, a forced circulation pump 6, a forced circulation compressor 7 and the secondary separator 1 as above.
For liquid connection, an outlet of the forced circulation pump 6 is communicated with a liquid channel inlet of the first forced circulation evaporator 4, a liquid channel outlet of the first forced circulation evaporator 4 is communicated with a liquid channel inlet of the crystallization separator 2, a liquid channel outlet of the crystallization separator 2 is communicated with a liquid channel inlet of the second forced circulation evaporator 3, a liquid channel outlet of the second forced circulation evaporator 3 is communicated with an inlet of the forced circulation pump 6, and an inlet of the forced circulation pump 6 is also communicated with a feeding hole;
for gas connection, a gas outlet of the crystal separator 2 is communicated with a gas inlet of the secondary separator 1, a gas outlet of the secondary separator 1 is communicated with a gas inlet of the forced circulation compressor 7, a gas outlet of the forced circulation compressor 7 is communicated with a gas channel inlet of the first forced circulation evaporator 4, a gas channel outlet of the first forced circulation evaporator 4 is communicated with a gas channel inlet of the second forced circulation evaporator 3, and a gas channel outlet of the second forced circulation evaporator 3 is communicated with a gas inlet of the crystal separator 2.
Since the MVR forced circulation system has the secondary separator, the MVR forced circulation system has the beneficial effects brought by the secondary separator, and please refer to the above contents, which will not be described herein again.
Further, the crystallization separator 2 is provided with a discharge pump 5.
The MVR forced circulation system provided by the scheme has the working principle that:
sending the saline water with the concentration of 19.8% to an inlet of a forced circulation pump 6, after a proper liquid level is established in a crystallization separator 2 of the forced circulation system, establishing circulation of the crystallization separator 2, namely a second forced circulation evaporator 3, a forced circulation pump 6, a first forced circulation evaporator 4 and the crystallization separator 2, enabling a tube pass of the second forced circulation evaporator 3/the first forced circulation evaporator 4 to be saline water, enabling a shell pass to be heating steam from a forced circulation compressor 7, further heating and concentrating the saline water in the forced circulation evaporator, enabling the salt concentration at an outlet of a discharging pump 5 to reach 26.4%, and sending the saline water to the next procedure after heat exchange; the secondary steam in the crystallization separator 2 enters a secondary separator 1, the secondary steam in the secondary separator 1 is subjected to solid particle removal through a defoaming net 102, then enters a forced circulation compressor 7 for temperature and pressure rise, and then enters shell side heating materials of forced circulation evaporators 3 and 4. In the process of heating the materials, the steam is condensed into water flow to a condensate tank and is discharged by a distilled water pump for reuse.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A secondary separator is characterized by comprising a tower kettle body (101), a defoaming net (102) and a spraying device (104),
the tower bottom body (101) is provided with a gas inlet (105), a gas outlet (106), a liquid outlet (108) and a desalted water inlet (107), the nozzle of the spraying equipment (104) and the defoaming net (102) are both arranged in the inner cavity of the tower bottom body (101), and the gas inlet (105) and the nozzle are both positioned above the defoaming net (102),
the gas inlet (105) is used for being communicated with the crystallization separator (2), the gas outlet (106) is used for being communicated with the forced circulation compressor (7), the desalted water inlet (107) is used for introducing desalted water, and the liquid outlet (108) is used for being communicated with the water inlet of the spraying device (104) and the mother liquor tank (8) respectively.
2. The secondary separator of claim 1, further comprising a circulation pump (103), the drain (108) being in series with the circulation pump (103).
3. The secondary separator according to claim 2, characterized in that the circulation pump (103) is a circulation pump of dual-phase steel material.
4. The secondary separator as claimed in claim 1, further comprising a detection device for detecting conductivity or solid content of the washing water discharged from the drain port (108).
5. The secondary separator according to claim 1, further comprising an anti-freeze tube bundle (109) for heating the liquid phase within the column bottom body (101).
6. The secondary separator of claim 1, wherein the column bottom body (101) comprises a first column body and a second column body, the bottom of the first column body is connected with the second column body,
the top of the first tower body is provided with the gas inlet (106), the middle part is provided with the nozzle of the spraying equipment (104), the bottom part extends into the middle part of the second tower body,
the side surface of the top of the second tower body is provided with the gas outlet (106), the middle part of the second tower body is provided with the defoaming net (102) higher than the bottom surface of the first tower body, and the bottom surface is provided with the liquid outlet (108).
7. The secondary separator according to claim 1, wherein the temperature of the liquid phase in the column bottom body (101) in the on-state is 92 ℃ to 95 ℃.
8. The secondary separator of claim 1, wherein the gas outlet (106) is at least 50cm above the surface of the desalinated water within the column bottom body (101).
9. A forced MVR circulation system, characterized by comprising a crystallization separator (2), a second forced circulation evaporator (3), a first forced circulation evaporator (4), a forced circulation pump (6) and a forced circulation compressor (7) and a secondary separator (1) according to any one of claims 1 to 8,
wherein the outlet of the forced circulation pump (6) is communicated with the inlet of the liquid channel of the first forced circulation evaporator (4), the outlet of the liquid channel of the first forced circulation evaporator (4) is communicated with the inlet of the liquid channel of the crystallization separator (2), the outlet of the liquid channel of the crystallization separator (2) is communicated with the inlet of the liquid channel of the second forced circulation evaporator (3), the outlet of the liquid channel of the second forced circulation evaporator (3) is communicated with the inlet of the forced circulation pump (6), and the inlet of the forced circulation pump (6) is also communicated with the feed inlet;
the gas outlet of the crystallization separator (2) is communicated with the gas inlet of the secondary separator (1), the gas outlet of the secondary separator (1) is communicated with the gas inlet of the forced circulation compressor (7), the gas outlet of the forced circulation compressor (7) is communicated with the gas channel inlet of the first forced circulation evaporator (4), the gas channel outlet of the first forced circulation evaporator (4) is communicated with the gas channel inlet of the second forced circulation evaporator (3), and the gas channel outlet of the second forced circulation evaporator (3) is communicated with the gas inlet of the crystallization separator (2).
10. The forced MVR circulation system according to claim 9, characterized in that the crystallization separator (2) is provided with a discharge pump (5).
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| CN202111487549.4A CN114146435A (en) | 2021-12-07 | 2021-12-07 | Secondary separator and MVR forced circulation system |
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| CN206535232U (en) * | 2017-02-28 | 2017-10-03 | 无锡宝南机器制造有限公司 | MVR forced-circulation evaporation crystal systems |
| CN107569978A (en) * | 2017-08-31 | 2018-01-12 | 深圳市瑞升华科技股份有限公司 | A kind of indirect steam aeration tower for MVR systems |
| CN208990256U (en) * | 2018-07-17 | 2019-06-18 | 合众高科（北京）环保技术股份有限公司 | A kind of environment-friendly type MVR evaporator |
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2021
- 2021-12-07 CN CN202111487549.4A patent/CN114146435A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2928276A1 (en) * | 2008-03-10 | 2009-09-11 | Ridel Soc Par Actions Simplifi | MECHANICAL VAPOR COMPRESSION EVAPORATOR HAVING A SEPARATOR INLET RELIEF DEVICE |
| CN206535232U (en) * | 2017-02-28 | 2017-10-03 | 无锡宝南机器制造有限公司 | MVR forced-circulation evaporation crystal systems |
| CN107569978A (en) * | 2017-08-31 | 2018-01-12 | 深圳市瑞升华科技股份有限公司 | A kind of indirect steam aeration tower for MVR systems |
| CN208990256U (en) * | 2018-07-17 | 2019-06-18 | 合众高科（北京）环保技术股份有限公司 | A kind of environment-friendly type MVR evaporator |
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