CN116407856A - Three-dimensional motion spiral self-cleaning formula falling film evaporator - Google Patents
Three-dimensional motion spiral self-cleaning formula falling film evaporator Download PDFInfo
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- CN116407856A CN116407856A CN202111644718.0A CN202111644718A CN116407856A CN 116407856 A CN116407856 A CN 116407856A CN 202111644718 A CN202111644718 A CN 202111644718A CN 116407856 A CN116407856 A CN 116407856A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 78
- 239000011552 falling film Substances 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000013461 design Methods 0.000 claims abstract description 22
- 239000010408 film Substances 0.000 claims abstract description 18
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 238000009825 accumulation Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/06—Evaporators with vertical tubes
- B01D1/12—Evaporators with vertical tubes and forced circulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/02—Supports for cleaning appliances, e.g. frames
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
- F28G9/005—Cleaning by flushing or washing, e.g. with chemical solvents of regenerative heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The automatic cleaning spiral falling film evaporator with three-dimensional motion has the advantages that a hook head shaft section of the automatic cleaning spiral in a heating pipe is directly hung on an end surface track of the three-dimensional motion machine, and the automatic cleaning spiral can stably ascend and descend along the end surface track under the action of the actual high-speed falling film flow impulse, so that the rotation moment is large, and the upward and downward reciprocating motion is realized; meanwhile, hundreds of random radial vibration in each minute occurs, and slow rotation under 100 rotations per minute controlled by rising is avoided, so that the possibility of abrasion between the self-cleaning screw and the inner wall of the heating pipe is completely eradicated. The structural design of the three-dimensional motion body tube can ensure that the feed liquid flowing into each heating tube is quite uniform. The combined action of the three functions of automatic cleaning and scale prevention of an automatic cleaning screw, convection heat transfer enhancement and circumferential film distribution of a full tube side is ideal, and the long-term stable continuous and efficient production of the falling film evaporator is realized.
Description
Technical Field
The invention discloses a three-dimensional movement spiral automatic cleaning type falling film evaporator, and mainly relates to automatic cleaning and heat transfer enhancement of dirt in tubes of a tube array falling film evaporator and a heat exchanger.
Background
The existing evaporator faces the problem of dirt in a heating pipe, most of the evaporators have no automatic cleaning technology and are almost treated by adopting a periodical shutdown cleaning method. The cycle average heat transfer coefficient is generally only 1/3 to 2/3 of that of the scale-free process, and the energy loss and the productivity loss are large.
For evaporation of such easily fouled solutions, forced circulation evaporators are one option which is more adopted, but at a cost which is too high. For example, a domestic MVR heat pump tube evaporator of high-salt wastewater and a 220KW heat pump are required to be provided with a 110KW forced circulation pump, so that the average flow velocity in a heating tube is up to 1.8m/s, suspended salt crystals are utilized to realize fluidization flushing to produce, scale is delayed, the production running time is prolonged, the energy-saving efficiency of a heat pump evaporation device is greatly reduced, the heat transfer coefficient is still very low and is only 350 (w/m 2 At c) and also requires a every two week parking wash.
In the falling film type automatic cleaning technology patent disclosed in recent years, for example, ZL201110038777.3, an in-pipe automatic cleaning scale-proof falling film type evaporation device; ZL201711042017.3, wave flow valve self-cleaning standpipe falling film evaporator. Besides the automatic cleaning of the spiral, a film distributor, a reciprocating power spring and a frame disk for installing and fixing the power spring are also needed, the height requirement of the upper pipe box is high, the installation technical requirement is relatively high, the overall structure is too complex, and the high reliability of engineering requirements is not facilitated.
Disclosure of Invention
The three-dimensional motion spiral automatic cleaning type falling film evaporator provided by the invention has the advantages that the integral scheme of an automatic cleaning mechanism is greatly simplified through the ingenious structural design of the three-dimensional motion machine, the reliability is improved, the installation is convenient, and the technical advantages of the existing three-dimensional motion automatic cleaning function, the full tube side rotational flow film distribution and the heat exchange tube internal convection heat transfer enhancement are well reserved.
The technical scheme of the invention is as follows:
the three-dimensional moving spiral automatic cleaning falling film evaporator has the main components of upper pipe box, three-dimensional moving machine, heating chamber, heating pipe, automatic cleaning spiral, separating chamber and circulating pump.
An automatic cleaning screw is arranged in the heating pipe. The straight shaft section on the upper part of the spiral is automatically cleaned, and after the straight shaft section passes through the shaft hole of the three-dimensional motion machine, the hook head shaft section is hung on the end surface track of the three-dimensional motion machine.
The three-dimensional exercise machine is provided with a three-dimensional exercise machine body tube, an end surface rail, a bearing hub, a shaft hole, a balance hole, a cross fixing frame and spiral teeth. The three-dimensional movement machine body tube is fixedly arranged at the inlet section of the heating tube by utilizing the cross fixing frame and the spiral teeth. The width dimension B of the cross fixing frame is required to be larger than the center distance between the heating pipes by more than 1mm, and the possibility of autorotation is avoided very reliably by utilizing the mutual clamping of the cross fixing frames of the adjacent heating pipes when autorotating.
The tooth height of the spiral teeth is 2-6 mm, and the design principle is that the larger the design flow velocity in the heating pipe is, the larger the value is. The number of the spiral teeth is 2-4, and the larger the inner diameter of the heating pipe is, the more the designed spiral teeth are. The tooth top circle of the spiral tooth is fixed with the inner wall of the heating pipe by interference fit smaller than 0.15 mm. The range of the helix angle gamma of the helical teeth is 20-35 degrees, and the larger the inner diameter of the heating pipe is, the smaller the value of the helix angle gamma is.
The axial height change of the end face track is that the slope angle alpha rises and the slope angle beta falls. The rising section of the end rail is generally about half a circle and is generally about 200 to 280 ° in order to strive for a relatively large stroke of up-and-down reciprocation. The larger the self-rotation torque of the self-cleaning screw is, the larger the slope angle alpha of the end face track design of the ascending section is.
The diameter of the shaft hole is 2-3 mm, which is 0.05-0.20 mm larger than the outer diameter of the steel wire for manufacturing the automatic cleaning screw. The thickness of the bearing hub is 2-4 mm.
The balance hole has the function of keeping the vapor pressure in the heating pipe and the vapor pressure in the upper pipe box basically balanced, ensuring that the liquid accumulation layer can stably and smoothly pass through the flow channel between the spiral teeth, and also has a certain speed to flow to the inner wall of the heating pipe to form a film uniformly. Flat plateDiameter of balance hole
The larger the inner diameter of the heating pipe is, the larger the value of the diameter of the balance hole is. Height H of balance hole from pipe orifice of heating pipe 2 Liquid product layer H requiring a smoother running operation 1 The depth is more than 30 mm.
Liquid accumulation layer H for smooth operation 1 The depth range is 50-100 mm. The design principle mainly considers that the larger the heating temperature difference of the evaporator is, the larger the value is; secondly, the larger the diameter of the upper pipe box is, the larger the design flow is, and the larger the value is.
The automatic cleaning screw is made of stainless steel wires with the diameter of 1.5-2.2 mm. The clearance between the outer diameter of the automatic cleaning screw and the inner wall of the heating pipe is 3-7 mm, and the larger the diameter of the heating pipe is, the larger the design flow is, and the larger the value is. The pitch of the automatic cleaning screw is (1.3-1.9) times of the inner diameter of the heating pipe. The design value of the diameter and the pitch of the stainless steel wire is according to the inner diameter and the flow velocity of the heating pipe, and is in a consistent relation with the inner diameter and the flow velocity of the heating pipe. The length of the automatic cleaning screw is 100-400mm shorter than that of the heating pipe.
When the evaporator runs, circulating feed liquid enters the upper pipe box from the feed liquid pipe, and then uniformly enters the accumulated liquid layer of the upper pipe box through the uniformly distributed gear rings at 360 degrees. By depth H 1 The liquid accumulation layer of 50-100 mm ensures that the flow flowing into each heating pipe is basically uniform. The actual flow speed of the falling film flow in the heating pipe is repeatedly tested for hundreds of times, and the simulation test results are consistent with each other, which show that the flow speed is as high as 1.3-2.2 m/s. Under the impact of the liquid film with high flow speed, the automatic cleaning screw not only generates hundreds of radial random vibrations per minute and knocks dirt on the inner wall of the heating pipe, thereby realizing automatic cleaning; the automatic cleaning screw has the flow guiding function on the falling film liquid flow, so that the liquid film on the inner wall of the whole heating pipe is converted into spiral flow, the convection heat transfer strengthening function is generated, more importantly, the strong circumferential uniform film distribution function from top to bottom can be effectively ensured, and the occurrence of local dry wall and rapid scaling is avoided from a new mechanism.
The automatic cleaning screw converts the liquid film into spiral flow, and simultaneously, according to Newton's third law, the automatic cleaning screw also obtains the rotation torque provided by the liquid film reaction, and the value of the rotation torque is larger, so that the power requirement of rotation is ensured. When the self-cleaning screw rotates, the hook head shaft of the top section of the self-cleaning screw continuously rises and falls along the end surface track to reciprocate under the interaction of the hook head shaft and the end surface track. Due to the autorotation and up-down reciprocation of the automatic cleaning screw, the automatic cleaning and scale preventing capability of the automatic cleaning screw is enhanced, and the uniformity of vibration knocking cleaning on the inner wall of the heating pipe is greatly improved.
Based on the combined action of the three functions of automatic cleaning and scale prevention, convection heat transfer enhancement and circumferential film distribution of the whole tube side, the long-term stable continuous and efficient production of the falling film evaporator is ideally realized.
Because the automatic cleaning screw has very effective deceleration effect when the automatic cleaning screw ascends along the end surface track, the rotating speed is successfully controlled to be not more than 120 revolutions per minute all the time, the possibility of abrasion between the automatic cleaning screw and the inner wall of the heating pipe is avoided, and the high reliability requirement of engineering is well met.
Drawings
FIG. 1 is a general view of a three-dimensional moving spiral self-cleaning falling film evaporator of the present invention
FIG. 2 is a cross-sectional view of a three-dimensional exercise machine
Fig. 3 is a front view of the three-dimensional exercise machine
FIG. 4 is a circumferential 360 development of the end rail height
Detailed Description
In the drawing, a 01 top view mirror 02 upper tube box 03 liquid level meter tube 04 is uniformly distributed with a gear ring 05 tube plate 06 three-dimensional motion machine 07 heating chamber 08 automatic cleaning spiral 09 heating steam inlet distribution chamber 10 heating tube 11 condensate 12 secondary steam outlet chamber 13 steam-liquid separation chamber 14 circulating pump 15 charging tube 16 non-condensable gas discharging tube 17 feeding tube 18 accumulated liquid layer 19 hook head shaft section 20 end face track 21 bearing hub 22 shaft hole 23 balance hole 24 three-dimensional motion machine body tube 25 cross fixing frame 26 straight line shaft section 27 spiral teeth
The three-dimensional motion spiral automatic cleaning type falling film evaporator mainly comprises an upper pipe box 02, a three-dimensional motion machine 06, a heating chamber 07, a heating pipe 10, an automatic cleaning spiral 08, a vapor-liquid separation chamber 13 and a circulating pump 14.
An automatic cleaning screw 08 is arranged in the heating pipe 10. The straight shaft section 26 at the upper part of the self-cleaning screw 08 passes through the shaft hole 22 of the three-dimensional motion machine 06, and then the hook head shaft section 19 is hung on the end surface rail 20 of the three-dimensional motion machine 06.
The three-dimensional exercise machine 06 has a three-dimensional exercise machine barrel 24, an end surface rail 20, a bearing hub 21, a shaft hole 22, a balance hole 23, a cross fixing frame 25 and screw teeth 27. The three-dimensional exercise barrel 24 is fixedly mounted at the inlet section of the heating pipe 07 by using a cross fixing frame 25 and helical teeth 27. The width dimension B of the cross-shaped fixing frame 25 is required to be larger than the center distance between the heating pipes 07 by more than 1mm, and the possibility of occurrence of rotation is avoided very reliably by the inevitable mutual seizing when the cross-shaped fixing frames of the adjacent heating pipes 07 rotate.
The tooth height of the spiral teeth 27 is 2-6 mm, and the design principle is that the larger the design flow velocity in the heating pipe 07 is, the larger the value is. The number of teeth of the spiral teeth 27 is 2-4, and the larger the inner diameter of the heating pipe 07 is, the more the number of teeth of the spiral teeth 27 is designed. The tip circle of the spiral tooth 27 is fixed with the inner wall of the heating pipe 07 by interference fit with the diameter of less than 0.15 mm. The value of the spiral angle gamma of the spiral teeth 27 is 20-35 degrees, and the larger the inner diameter of the heating pipe 27 is, the smaller the design value of the spiral angle gamma is.
The axial height of the end rail 20 changes by an increasing ramp angle α and a decreasing ramp angle β. The rising section of the end rail 20 is generally about half a circle and is typically about 200 to 280 in order to strive for a relatively large up-and-down reciprocating stroke. The greater the self-rotation torque of the self-cleaning screw 08, the greater the ramp angle α of the end face rail 20 of the rising section.
The diameter of the shaft hole 22 is 2-3 mm, which is 0.05-0.20 mm larger than the outer diameter of the steel wire for manufacturing the self-cleaning screw 08. The thickness of the bearing hub 21 is 2-4 mm.
The balance hole 22 is used for keeping the vapor pressure in the heating pipe 10 and the vapor pressure in the upper pipe box 02 basically balanced, ensuring that the liquid in the liquid accumulation layer 18 stably and smoothly passes through the flow passage between the spiral teeth 27 and has a certain speedThe temperature flow is to the inner wall of the heating pipe 10 to form a uniform film. Balance hole 22 diameter
The larger the inner diameter of the heating pipe 10 is, the larger the diameter of the balance hole 22 is. Height H of balance hole 22 from the orifice of heating pipe 10 2 The depth H of the liquid layer 18 is required to be greater than that of a steady running operation 1 And the size is more than 30 mm.
The self-cleaning screw 08 is made of stainless steel wires with the diameter of 1.5-2.2 mm. The clearance between the outer diameter of the automatic cleaning screw 08 and the inner wall of the heating pipe 10 is 3-7 mm, and the larger the diameter of the heating pipe 10 is, the larger the design flow is, and the larger the value is. The pitch of the self-cleaning screw 08 is (1.3-1.9) times the inner diameter of the heating pipe 10. The design value of the diameter and the pitch of the stainless steel wire is based on the inner diameter and the flow velocity of the heating pipe 10, and is in a consistent relation with the inner diameter and the flow velocity of the heating pipe 10. The length of the self-cleaning screw 08 is 100-400mm shorter than the heating pipe 10.
When the evaporator runs, circulating feed liquid enters the upper pipe box 02 from the feed liquid pipe 17, and then uniformly enters the accumulated liquid layer 18 of the upper pipe box 02 in the 360-degree direction through the uniformly distributed gear rings 04. By depth H 1 The 50-100 mm liquid accumulation layer 18 ensures that the flow rate flowing into each heating pipe 10 is basically uniform. The simulation and actual measurement results repeated for hundreds of times show that the actual flow velocity of the falling film flow in the heating 10 pipes are consistent with each other and are up to 1.3-2.2 m/s. Under the impact of the liquid film with high flow speed, the automatic cleaning screw 08 not only generates hundreds of radial random vibrations per minute and strikes dirt on the inner wall of the heating pipe 10, thereby realizing automatic cleaning; the flow guiding function of the self-cleaning spiral 08 on the falling film liquid flow enables the liquid film on the inner wall of the whole heating pipe 10 to be converted into spiral flow, so that the convection heat transfer strengthening function is not generated, and more importantly, the strong circumferential uniform film distribution work from top to bottom can be effectively ensuredCan avoid local dry wall and rapid scaling from the new mechanism.
The self-cleaning screw 08 converts the liquid film into spiral flow, and simultaneously, according to Newton's third law, the self-cleaning screw 08 also obtains the rotation moment provided by the reaction of the liquid film, and the value of the rotation moment is larger, so that the power requirement of rotation is ensured. When the self-cleaning screw 08 rotates, the hook head shaft section 19 of the top section of the self-cleaning screw 08 continuously ascends and descends along the end surface track 20 to reciprocate under the interaction of the end surface track 20. Due to the autorotation and up-and-down reciprocation of the automatic cleaning screw 08, the automatic cleaning and scale preventing capability of the automatic cleaning screw 08 is enhanced, and the uniformity of vibration knocking cleaning on the inner wall of the heating pipe 10 is greatly improved.
Based on the combined action of the three functions of automatic cleaning and scale prevention, convection heat transfer enhancement and circumferential film distribution of the whole tube side of the automatic cleaning screw 08, the long-term stable, continuous and efficient production of the falling film evaporator is ideally realized.
Because of the very effective deceleration action of the automatic cleaning screw 08 when the end face rail 20 ascends, the rotating speed is successfully controlled to be not more than 120 revolutions per minute all the time, the possibility of abrasion between the automatic cleaning screw 08 and the inner wall of the heating pipe 10 is avoided, and the high reliability of the engineering basic requirements is well met.
Claims (4)
1. The utility model provides a three-dimensional motion spiral self-cleaning formula falling film evaporator, main part includes pipe case (02), three-dimensional motion machine (06), heating chamber (07), heating pipe (10), self-cleaning spiral (08), vapour-liquid separation room (13), circulating pump (14), its technical characterized in that:
an automatic cleaning screw (08) is arranged in a heating pipe (10) of the heating chamber (07), and after a linear shaft section (26) at the upper part of the automatic cleaning screw (08) passes through a shaft hole (22) of the three-dimensional motion machine (06), a hook head shaft section (19) is hung on an end surface track (20) of the three-dimensional motion machine (06);
the main components of the three-dimensional exercise machine (06) comprise a three-dimensional exercise machine barrel (24), an end surface track (20), a cross fixing frame (25) and spiral teeth (27);
the three-dimensional motion body tube (24) is fixedly arranged at the inlet section of the heating pipe (07) by utilizing a cross fixing frame (25) and spiral teeth (27);
the tooth height of the spiral teeth (27) is 2-6 mm, and the design principle is that the larger the design flow speed in the heating pipe (07) is, the larger the value is; the number of teeth of the spiral teeth (27) is 2-4, and the larger the inner diameter of the heating pipe (07), the more the number of design teeth of the spiral teeth (27) is; the tooth top circle of the spiral tooth (27) is fixed with the inner wall of the heating pipe (07) in an interference fit way, wherein the diameter of the tooth top circle is smaller than 0.15 mm; the value range of the helix angle gamma of the helical teeth (27) is 20-35 degrees, and the larger the inner diameter of the heating pipe (27) is, the smaller the design value of the helix angle gamma is;
the axial height change of the end surface track (20) is that the slope angle alpha rises and the slope angle beta falls, the rising section of the end surface track (20) takes a half circle, and generally takes 200-280 degrees to obtain a relatively large stroke of up-down reciprocating motion; the larger the self-rotation torque of the self-cleaning screw (08), the larger the slope angle alpha of the end surface track (20) of the ascending section;
the balance holes (23) are used for keeping the vapor pressure in the heating pipe (10) and the vapor pressure in the upper pipe box (02) basically balanced, so that the liquid in the liquid accumulation layer (18) can stably and smoothly pass through the flow channel between the spiral teeth (27) and flow to the inner wall of the heating pipe (10) at a certain speed to form a film uniformly.
2. A three-dimensional motion spiral self-cleaning falling film evaporator according to claim 1, wherein: depth H of liquid accumulation layer (18) in upper tube box (02) 1 The range is 50-100 mm, and the design principle is that the larger the heating temperature difference of the evaporator is, the larger the value is; secondly, the larger the diameter of the upper pipe box (02) is, the larger the design flow is, and the larger the value is.
3. A three-dimensional motion spiral self-cleaning falling film evaporator according to claim 1, wherein: the width dimension B of the cross-shaped fixing frame (25) of the three-dimensional movement body tube (24) is required to be larger than the center distance between the heating pipes (07) by more than 1mm, and the possibility of autorotation is avoided very reliably by utilizing the mutual clamping of the cross-shaped fixing frames of the adjacent heating pipes (07) when the cross-shaped fixing frames autorotate.
4. A three-dimensional motion spiral self-cleaning falling film evaporator according to claim 1, wherein: balance hole (23) diameter of three-dimensional motion body tube (24)
The larger the inner diameter of the heating pipe (10), the larger the diameter value of the balance hole (23); height H of balance hole (23) from pipe orifice of heating pipe (10) 2 The depth H of the liquid layer (18) is required to be greater than that of a smooth running operation 1 And the size is more than 30 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111644718.0A CN116407856A (en) | 2021-12-29 | 2021-12-29 | Three-dimensional motion spiral self-cleaning formula falling film evaporator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111644718.0A CN116407856A (en) | 2021-12-29 | 2021-12-29 | Three-dimensional motion spiral self-cleaning formula falling film evaporator |
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| CN116407856A true CN116407856A (en) | 2023-07-11 |
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| CN202111644718.0A Pending CN116407856A (en) | 2021-12-29 | 2021-12-29 | Three-dimensional motion spiral self-cleaning formula falling film evaporator |
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- 2021-12-29 CN CN202111644718.0A patent/CN116407856A/en active Pending
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