CN102657948B - Liquid distributor and vertical tube falling film evaporator comprising same - Google Patents
Liquid distributor and vertical tube falling film evaporator comprising same Download PDFInfo
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- CN102657948B CN102657948B CN201210155135.6A CN201210155135A CN102657948B CN 102657948 B CN102657948 B CN 102657948B CN 201210155135 A CN201210155135 A CN 201210155135A CN 102657948 B CN102657948 B CN 102657948B
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- 239000007788 liquid Substances 0.000 title claims abstract description 163
- 239000011552 falling film Substances 0.000 title claims abstract description 120
- 241000973497 Siphonognathus argyrophanes Species 0.000 claims abstract description 3
- 238000009826 distribution Methods 0.000 claims description 94
- 230000037361 pathway Effects 0.000 claims description 55
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 239000011780 sodium chloride Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 10
- 239000010408 film Substances 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 5
- 239000012267 brine Substances 0.000 description 8
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- -1 desalinization Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a liquid distributor and a vertical tube falling film evaporator comprising the same. The liquid distributor mainly comprises a flow-guiding body and a support component, wherein the surrounding of a main body of the flow-guiding body is a concave surface, and the basal area of a top cover of the flow-guiding body is larger than the area of a tube mouth of a heat exchange tube of the vertical tube falling film evaporator; and the flow-guiding body is movably or fixedly supported in a corresponding position of the upper part in the heat exchange tube of the vertical tube falling film evaporator through the support component, so that a certain gap exists between the undersurface edge of the top cover of the flow-guiding body and the upper surface of a tube plate of the vertical tube falling film evaporator to form an intake channel. The vertical tube falling film evaporator comprises the liquid distributor. According to the structure of the flow-guiding body of the liquid distributor, on one hand, the area of a low-speed liquid area is reduced, therefore the deposition of suspended solids can be reduced; and on the other hand, the inner wall of the heat exchange tube forms smooth liquid flow with few bubbles and a uniform liquid film is easier to form.
Description
Technical field
The invention belongs to heat exchange evaporation equipment technical field, relate to a kind of liquid distribution trough and the vertical tube falling film evaporimeter containing this distributor.
Background technology
Vertical tube falling film evaporimeter utilizes pump to make liquid be recycled to the top of shell-and-tube heat exchanger from low spot.Once enter top, liquid is assigned to the inner surface of one or more vertical heat exchange pipe.Vertical tube falling film evaporimeter has that heat transfer coefficient is high, the heating material time is short, heat transfer temperature loss is little, economize energy, less scaling, be easy to the advantages such as process heat sensitive material, and be widely used in the industrial department such as chemical industry and metallurgy, light industry, chemical fibre, food processing, medicine, desalinization, sewage disposal.For being distributed to making uniform liquid in every root heating tube, and under the effect of gravity and self-evaporating indirect steam, forming uniform liquid film along heating tube inwall and flow from top to bottom, must liquid distribution device be set.Whether the structure of liquid distribution device is reasonable, and whether respective liquid distribution is even, by the stability of the heat transfer efficiency and operation that directly affect falling film evaporator, thus affects production capacity, product quality and equipment life.Due to liquid usually containing dissolve with the solid suspended, distribution apparatus internal incrustation of being therefore everlasting, affect the uniformity of liquid distribution, while also have impact on life-span of distribution apparatus.
The heat-transfer effect of falling film evaporator is subject to the impact of flow rate of liquid and thickness of liquid film in heat exchanger tube.Liquid, along inside pipe wall to time dirty, is introduced into the energy heats of heat exchange pipe external surface.Once liquid reaches boiling point, partially liq is evaporated into steam.Steam flows down along heat exchanger tube inner surface together with liquid.Traditional falling film evaporator installs distribution grid to guarantee that uniform liquid is assigned in all vertical heat exchanger tubes at evaporimeter top.Liquid enters distribution grid top, because Action of Gravity Field, flows down through the aperture on distribution grid.On distribution grid, the number of aperture, size and orientation determine the Liquid distribution situation entering every root heat exchanger tube.
The liquid distribution device (U.S. Patent number 4,248,296) applied for a patent is that a kind of liquid that guides enters the plug-in unit of vertical heat exchanger tube with tangential direction, makes vertical heat exchanger tube inner surface produce the liquid film of uniform wall thickness.Liquid enters from two holes of distribution apparatus side.Hole is arranged on specific angle to optimize the distributed effect of liquid.Such angle arranges and the suspended solid in liquid can be made to be deposited in heat exchanger upper tube box.In addition, hole is arranged at this distribution apparatus top, and suspended solid deposits at this.The solid of deposition can reduce Liquid distribution efficiency.
Another liquid distribution device applied for a patent (U.S. Patent number 3,995,663) is that a pipe plug-in part makes liquid enter from plan vertical circular hole, is uniformly distributed by liquid by an inverted cone at heat exchanger tube inwall.But this liquid distribution device easily forms turbulent flow, the liquid of turbulent flow can introduce bubble, affects the formation of uniform liquid film.Because liquid flows into from this equipment top, equipment both sides can form low regime, so that suspended solid is deposited on this region.The solid of deposition can reduce Liquid distribution efficiency.In addition, cone is arranged on the center of liquid stream by the characteristic requirements of equipment, meeting deposition solid, and causes the disturbance of liquid stream.The disturbance of liquid stream can form bubble, thus destroys being uniformly distributed of liquid film.
The said equipment is furnished with the cylinder be slidably matched, and is convenient to liquid distribution pipe internal face.This structure is equivalent to the heat-transfer area of distribution apparatus and heat exchanger tube inwall to isolate.In use procedure, the cylinder be slidably matched can be attached to the inner surface of heat exchanger tube because of crystallization, causes cylinder not move.
Summary of the invention
The object of the invention is the above-mentioned deficiency for prior art, a kind of liquid distribution trough is provided.
Another object of the present invention is the vertical tube falling film evaporimeter containing this liquid distribution trough.
Object of the present invention realizes by following technical scheme:
A kind of vertical tube falling film evaporimeter liquid distribution trough, described liquid distribution trough is concave surface primarily of main body surrounding and its top cover basal cross section amasss the baffle of the heat exchanger tube mouth of pipe sectional area being greater than vertical tube falling film evaporimeter, and by baffle activity or the heat exchanger tube internal upper part relevant position being fixedly supported to vertical tube falling film evaporimeter, the support component making tube sheet end face interval one fixed gap of the top cover bottom edge of baffle and vertical tube falling film evaporimeter form feed pathway forms; Liquid enters along the concave surface of described feed pathway, baffle and is distributed in heat exchanger tube inner surface.
Wherein, the basal diameter of described baffle main body is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
The height of described feed pathway is 0.3 ~ 3 times of heat exchanger tube internal diameter.
Described baffle is symmetrical along the central shaft of the heat exchanger tube of vertical tube falling film evaporimeter.
Described top cover is hemispherical, semiellipse shape, tabular, or any one bottom surface is plane, and floor space is greater than the shape of heat exchange tube open area.
The main body surrounding of described baffle is smooth concave surface; Or the main body of described baffle forms by rounding stage body, cylinder, positive Rotary-table seamless connectivity the entirety that surrounding is concave surface from top to bottom successively, rounding stage body bottom surface is connected with the cylinder identical with basal diameter, cylinder bottom surface is connected with positive Rotary-table, and cylinder basal diameter is identical with positive Rotary-table end face diameter; Positive Rotary-table basal diameter is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
The number of described support component is 2 ~ 6, for polygon gusset, it is while be connected with the concave surface of baffle is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component relies on this adjacent is on the tube sheet of vertical tube falling film evaporimeter, make baffle movable or be fixedly supported to the heat exchanger tube internal upper part relevant position of vertical tube falling film evaporimeter, top cover bottom edge and the vertical tube falling film evaporator tube plate top surface of baffle form feed pathway;
Or described support component is made up of the support chip of 3 ~ 6 blades and the connection downwards of lower end, each blade rear portion one being connected to the spirality of top cover bottom surface, the diameter of a circle that each vane tip outer rim track is formed is slightly larger than the external diameter of heat exchanger tube, in the upper port making the tip of each blade be pressed on heat exchanger tube or on tube sheet, the top cover bottom edge of baffle and tube sheet end face interval one fixed gap of vertical tube falling film evaporimeter form feed pathway, the height (i.e. the vertical range of the distance baffle top cover bottom surface, tip of spiral part) of each blade screw part is feed pathway height, the width of each support chip and the distance between heat exchanger tube inwall and baffle correspondence position outer wall closely cooperate, the support chip of each blade is abutted against between heat exchanger tube inwall and baffle correspondence position outer wall, thus by baffle activity or the heat exchanger tube internal upper part relevant position being fixedly supported to vertical tube falling film evaporimeter.
A kind of vertical tube falling film evaporimeter liquid distribution trough, described liquid distribution trough primarily of surrounding be concave surface baffle, by baffle, movable or fixed support is connected to the heat exchanger tube internal upper part relevant position of vertical tube falling film evaporimeter, the upper surface of baffle exposes heat exchanger tube support component composition suitable for reading; Described baffle upper surface diameter is greater than the external diameter of heat exchanger tube, make interval one fixed gap between the top edge of baffle concave surface and the tube sheet end face of vertical tube falling film evaporimeter form feed pathway, liquid enters along the concave surface of feed pathway, baffle and is distributed in heat exchanger tube inner surface.
The basal diameter of described baffle is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
The height of described feed pathway is 0.3 ~ 3 times of heat exchanger tube internal diameter.
Described baffle is symmetrical along the central shaft of the heat exchanger tube of vertical tube falling film evaporimeter.
Described baffle surrounding is smooth concave surface; Or described baffle forms by rounding stage body, cylinder, positive Rotary-table seamless connectivity the entirety that surrounding is concave surface from top to bottom successively, rounding stage body upper surface diameter is greater than the external diameter of heat exchanger tube, rounding stage body bottom surface is connected with the cylinder identical with basal diameter, cylinder bottom surface is connected with positive Rotary-table, and cylinder basal diameter is identical with positive Rotary-table end face diameter; Positive Rotary-table basal diameter is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
The number of described support component is 2 ~ 6, for polygon gusset, while be connected with the concave surface of baffle is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component relies on this adjacent is on the tube sheet of vertical tube falling film evaporimeter, make baffle movable or be fixedly supported to the heat exchanger tube internal upper part relevant position of vertical tube falling film evaporimeter, and make interval one fixed gap between the top edge of baffle concave surface and the tube sheet end face of vertical tube falling film evaporimeter form feed pathway.
A kind of vertical tube falling film evaporimeter, comprise the brine distribution case being positioned at heat exchanger top, tube sheet, liquid distribution trough, heat exchanger tube, saline slot, circulating pump, first liquid circulation pipe, second liquid circulation pipe, saline slot top is provided with several vertical heat exchanger tube, heat exchanger tube top is provided with tube sheet, tube sheet is in the correspondence position perforate on every root heat exchanger tube top, make it just can be fixed on heat exchanger tube top, every root heat exchanger tube is provided with a liquid distribution trough of the present invention, the baffle of described liquid distribution trough is arranged at every root heat exchanger tube internal upper part by support member supports, the bottom of saline slot is connected with the inlet of circulating pump by liquid circulating pipe, and the liquid outlet of circulating pump is connected with the brine distribution case being positioned at heat exchanger top by liquid circulating pipe.
Beneficial effect:
Liquid distribution trough of the present invention is used in the heat exchanger tube top of vertical tube falling film evaporimeter, liquid is distributed on tube sheet by brine distribution case, and dipped baffle top, and from forming feed pathway between the bottom edge and the tube sheet end face of vertical tube falling film evaporimeter of top cover or entering liquid distribution trough from forming feed pathway between the top edge and the tube sheet end face of vertical tube falling film evaporimeter of baffle concave surface with inside radial line, surrounding concave surface along baffle flows down, when arriving bottom baffle, liquid flows to heat exchanger tube inner surface with outside radial line.Because this invention can make liquid flow into from 360 ° of direction levels of liquid distribution trough, in equipment, fluid flow characteristics can avoid suspended solid to deposit at heat exchanger tube sheet place.
The structure of liquid distribution trough baffle of the present invention reduces the area of liquid low regime on the one hand, thus can reduce the deposition of suspended solid; Impel heat exchanger tube inwall to form smooth liquid stream on the other hand, the bubbles volume carried secretly is few, more easily forms uniform liquid film.
Concave surface bottom liquid distribution trough baffle of the present invention can reduce the drop amount falling into heat exchanger tube center, enables liquid more be distributed to heat exchanger tube inwall, and stream of liquid droplets to the edge of liquid distribution trough, and imports in main liquid stream.
Because the present invention only utilizes 2 ~ 6 support components that distribution apparatus is supported on heat exchanger tube center, support component and heat exchange tube wall contact area seldom, therefore can not affect the heat transfer of heat exchanger tube inwall.
As preferred embodiment of the present invention, liquid distribution trough movable supporting on the tube sheet of vertical tube falling film evaporimeter, is convenient to cleaning and safeguards by support component.
Accompanying drawing explanation
The structural representation of Fig. 1, embodiment 1 liquid distribution trough.
Wherein 1 is top cover, and 2 is rounding stage body, and 3 is cylinder, and 4 is positive Rotary-table, and 5 is support component, and 6 is the main body of baffle, and 7 is the tube sheet of vertical tube falling film evaporimeter, and 8 is the heat exchanger tube of vertical tube falling film evaporimeter, and 14 is liquid distribution trough, and 15 is baffle.
Fig. 2, embodiment 1 support component, wherein 5 is support component.
Fig. 3, embodiment 1 support component, wherein 1 is top cover, and 5 is support component, and 7 is tube sheet.
The structural representation of Fig. 4, embodiment 2 liquid distribution trough.
Wherein 2 is rounding stage body, and 3 is cylinder, and 4 is positive Rotary-table, and 5 is support component, and 7 is the tube sheet of vertical tube falling film evaporimeter, and 8 is the heat exchanger tube of vertical tube falling film evaporimeter, and 14 is liquid distribution trough, and 15 is baffle.
Fig. 5, embodiment 2 support component, wherein 5 is support component, and 7 is tube sheet.
The structural representation of Fig. 6, embodiment 3 liquid distribution trough.
Wherein 1 is top cover, and 5 is support component, and 6 is the main body of baffle, and 7 is the tube sheet of vertical tube falling film evaporimeter, and 8 is the heat exchanger tube of vertical tube falling film evaporimeter, and 14 is liquid distribution trough, and 15 is baffle.
The structural representation of Fig. 7, embodiment 4 liquid distribution trough.
Wherein 5 is support component, and 7 is the tube sheet of vertical tube falling film evaporimeter, and 8 is the heat exchanger tube of vertical tube falling film evaporimeter, and 14 is liquid distribution trough, and 15 is baffle.
The structural representation of Fig. 8, embodiment 5 liquid distribution trough.Wherein 1 is top cover, and 5 is spiral support parts, and 6 is the main body of baffle, and 7 is tube sheet, and 8 is heat exchanger tube, and 14 is liquid distribution trough, and 15 is baffle.
Fig. 9, embodiment 5 support component upward view, wherein, 1 is top cover, and 5 is support component.
Figure 10, vertical tube falling film evaporation structure schematic diagram.
Wherein, 7 is tube sheet, and 8 is heat exchanger tube, and 9 is saline slot, and 10 is circulating pump, and 11 is first liquid circulation pipe, and 12 is second liquid circulation pipe, and 13 is brine distribution case, and 14 is liquid distribution trough.
Detailed description of the invention
Below in conjunction with accompanying drawing, by specific embodiment, the present invention will be described in detail.Obviously, the invention is not restricted to following embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Embodiment 1
A kind of vertical tube falling film evaporimeter liquid distribution trough 14 as shown in Figure 1, be concave surface primarily of main body 6 surrounding and its top cover 1 floor space is greater than the baffle 15 of heat exchanger tube 8 orifice area of vertical tube falling film evaporimeter, and by the heat exchanger tube 8 internal upper part relevant position of baffle 15 movable supporting in vertical tube falling film evaporimeter, the support component 5 making tube sheet 7 upper surface interval one fixed gap of top cover 1 bottom edge of baffle 15 and vertical tube falling film evaporimeter form feed pathway forms.Baffle 15 is symmetrical along the central shaft of the heat exchanger tube of vertical tube falling film evaporimeter, is made up of main body 6 and top cover 1.Top cover 1 is in hat shape, and its bottom surface is connected with the upper surface of baffle main body 6 is seamless, and floor space is greater than heat exchange tube open area; The main body 6 of described baffle forms by rounding stage body 2, cylinder 3, positive Rotary-table 4 seamless connectivity the entirety that surrounding is concave surface from top to bottom successively, rounding stage body 2 bottom surface is connected with the cylinder 3 identical with basal diameter, cylinder 3 bottom surface is connected with positive Rotary-table 4, and cylinder 3 basal diameter is identical with positive Rotary-table 4 end face diameter; Positive Rotary-table 4 basal diameter is 0.6 times of heat exchanger tube 8 internal diameter.The number of support component 5 is 3, for polygon gusset, as shown in Figures 2 and 3, it is while be connected with the concave surface of baffle main body 6 is seamless, while be connected with the bottom edge of top cover 1 is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component 5 relies on this adjacent is on the tube sheet 7 of vertical tube falling film evaporimeter, make baffle 15 movable supporting in the heat exchanger tube 8 internal upper part relevant position of vertical tube falling film evaporimeter, top cover 1 bottom edge of baffle 15 and vertical tube falling film evaporimeter liquid distribution trough tube sheet 7 upper surface form feed pathway.The height of feed pathway is 0.3 times of heat exchanger tube internal diameter.The flow rate of liquid entering heat exchanger tube is determined by the height of feed pathway.
Liquid enters liquid distribution trough 14 from forming feed pathway between the bottom edge and tube sheet 7 end face of vertical tube falling film evaporimeter of top cover 1 with inside radial line, surrounding concave surface along baffle main body 1 flows down, when arriving bottom baffle main body 1, liquid flows to heat exchanger tube inwall with outside radial line.
The flow rate of liquid entering heat exchanger tube 8 is determined by the height of feed pathway.According to actual conditions, changed the height of feed pathway by the shape changing support component 5, thus regulate the flow of every root heat exchanger tube.
Embodiment 2
Vertical tube falling film evaporimeter liquid distribution trough 14 shown in a kind of Fig. 4, primarily of surrounding be concave surface baffle 15, baffle movable supporting is connected to the heat exchanger tube 8 internal upper part relevant position of vertical tube falling film evaporimeter, and make the upper surface of baffle 15 expose heat exchanger tube 8 support component suitable for reading 5 to form; Described baffle 15 upper surface diameter is greater than the external diameter of heat exchanger tube 8, makes interval one fixed gap between (part of protruded tube heat pipe) edge, the top of baffle 15 concave surface and tube sheet 7 end face of vertical tube falling film evaporimeter form feed pathway.Baffle 15 is symmetrical along the central shaft of the heat exchanger tube 8 of vertical tube falling film evaporimeter, be made up of rounding stage body 2, cylinder 3, positive Rotary-table 4, rounding stage body 2 bottom surface is connected with the cylinder 3 identical with basal diameter, cylinder 3 bottom surface is connected with positive Rotary-table 4, cylinder 3 basal diameter is identical with positive Rotary-table 4 end face diameter, and positive Rotary-table 4 basal diameter is about 0.4 times of heat exchanger tube internal diameter.The number of support component 5 is 3, for polygon gusset, as shown in Figure 5, it is while be connected with the concave surface of baffle 15 is seamless, there are adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component 5 relies on this adjacent, on the tube sheet 7 of vertical tube falling film evaporimeter, make baffle 15 movable supporting in heat exchanger tube 8 internal upper part of vertical tube falling film evaporimeter, and it is suitable for reading to make the upper surface of baffle 15 (i.e. the upper surface of rounding stage body 2) expose heat exchanger tube.Upper surface diameter due to baffle 15 is greater than the external diameter of heat exchanger tube, makes interval one fixed gap between tube sheet 7 end face of the top edge of baffle 15 concave surface and vertical tube falling film evaporimeter form feed pathway.
Liquid enters liquid distribution trough 14 from forming feed pathway between the top edge and tube sheet 7 end face of vertical tube falling film evaporimeter of baffle 15 concave surface with inside radial line, surrounding concave surface along baffle 15 flows down, when arriving bottom baffle 15, liquid flows to heat exchanger tube inwall with outside radial line.
The flow rate of liquid entering heat exchanger tube 8 is determined by the height of feed pathway.The height of feed pathway is 0.3 ~ 3 times of heat exchanger tube 8 internal diameter.According to actual conditions, changed the height of feed pathway by the shape changing support component 5, thus regulate the flow of every root heat exchanger tube.
Embodiment 3
A kind of vertical tube falling film evaporimeter liquid distribution trough 14 as shown in Figure 6, be concave surface primarily of main body 6 surrounding and its top cover 1 floor space is greater than the baffle 15 of heat exchanger tube 8 orifice area of vertical tube falling film evaporimeter, and by the heat exchanger tube 8 internal upper part relevant position of baffle 15 movable supporting in vertical tube falling film evaporimeter, the support component 5 making tube sheet 7 upper surface interval one fixed gap of top cover 1 bottom edge of baffle 15 and vertical tube falling film evaporimeter form feed pathway forms.Baffle 15 is symmetrical along the central shaft of the heat exchanger tube 8 of vertical tube falling film evaporimeter, is made up of main body 6 and top cover 1.Top cover 1 is in hat shape, and its bottom surface is connected with the upper surface of baffle main body 6 is seamless, and floor space is greater than heat exchange tube open area.Baffle main body 6 basal diameter is about 0.5 times of heat exchanger tube internal diameter.The number of support component 5 is 3, for polygon gusset, it is while be connected with the concave surface of baffle main body 6 is seamless, while be connected with the bottom edge of top cover 1 is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component 5 relies on this adjacent is on the tube sheet 7 of vertical tube falling film evaporimeter, make baffle 15 movable supporting in the heat exchanger tube 8 internal upper part relevant position of vertical tube falling film evaporimeter, top cover 1 bottom edge of baffle 15 and vertical tube falling film evaporimeter liquid distribution trough tube sheet 7 upper surface form feed pathway.
Liquid enters liquid distribution trough 14 from forming feed pathway between the bottom edge and tube sheet 7 end face of vertical tube falling film evaporimeter of top cover 1 with inside radial line, surrounding concave surface along baffle main body 6 flows down, when arriving bottom baffle main body 6, liquid flows to heat exchanger tube inwall with outside radial line.
The flow rate of liquid entering heat exchanger tube 8 is determined by the height of feed pathway.The height of feed pathway is 0.3 ~ 3 times of heat exchanger tube 8 internal diameter.According to actual conditions, changed the height of feed pathway by the shape changing support component 5, thus regulate the flow of every root heat exchanger tube.
Embodiment 4
A kind of vertical tube falling film evaporimeter liquid distribution trough 14 as shown in Figure 7, this liquid distribution trough primarily of surrounding be smooth concave surface baffle 15, baffle 15 movable supporting is connected to the heat exchanger tube 8 internal upper part relevant position of vertical tube falling film evaporimeter, and make the upper surface of baffle 15 expose heat exchanger tube 8 support component suitable for reading 5 to form; Baffle 15 is symmetrical along the central shaft of the heat exchanger tube 8 of vertical tube falling film evaporimeter, its upper surface diameter is greater than the external diameter of heat exchanger tube 8, makes interval one fixed gap between tube sheet 7 end face of the top edge of baffle 15 concave surface and vertical tube falling film evaporimeter form feed pathway.Baffle 15 basal diameter is about 0.6 times of heat exchanger tube 8 internal diameter, makes liquid can be distributed to heat exchanger tube 8 inwall as far as possible.The number of support component 5 is 3, for polygon gusset, it is while be connected with the concave surface of baffle main body 6 is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component 5 relies on this adjacent is on the tube sheet 7 of vertical tube falling film evaporimeter, make baffle 15 movable supporting in the heat exchanger tube 8 internal upper part relevant position of vertical tube falling film evaporimeter, and it is suitable for reading to make the upper surface of baffle 15 expose heat exchanger tube.Upper surface diameter due to baffle 15 is greater than the external diameter of heat exchanger tube, makes interval one fixed gap between the top edge of baffle concave surface and the tube sheet end face of vertical tube falling film evaporimeter form feed pathway.The flow rate of liquid entering heat exchanger tube is determined by the height of feed pathway.
Liquid enters liquid distribution trough 14 from forming feed pathway between the top edge and tube sheet 7 end face of vertical tube falling film evaporimeter of baffle 15 concave surface with inside radial line, surrounding concave surface along baffle 15 flows down, when arriving bottom baffle 15, liquid flows to heat exchanger tube inwall with outside radial line.
The flow rate of liquid entering heat exchanger tube 8 is determined by the height of feed pathway.The height of feed pathway is 0.3 ~ 3 times of heat exchanger tube 8 internal diameter.According to actual conditions, changed the height of feed pathway by the shape changing support component 5, thus regulate the flow of every root heat exchanger tube.
Embodiment 5
A kind of vertical tube falling film evaporimeter liquid distribution trough 14 as shown in Figure 8, be concave surface primarily of main body 6 surrounding and its top cover 1 floor space is greater than the baffle 15 of heat exchanger tube 8 orifice area of vertical tube falling film evaporimeter, and by the heat exchanger tube 8 internal upper part relevant position of baffle 15 movable supporting in vertical tube falling film evaporimeter, the support component 5 making tube sheet 7 upper surface interval one fixed gap of top cover 1 bottom edge of baffle 15 and vertical tube falling film evaporimeter form feed pathway forms.Baffle 15 is symmetrical along the central shaft of the heat exchanger tube of vertical tube falling film evaporimeter, and baffle 15 basal diameter is 0.6 times of heat exchanger tube 8 internal diameter.Support component 5 is made up of (Fig. 9) the support chip of 4 blades and the connection downwards of lower end, each blade rear portion one being connected to the spirality of top cover 1 bottom surface, the diameter of a circle that each vane tip outer rim track is formed is slightly larger than the internal diameter of heat exchanger tube 8, in the upper port making the tip of each blade be pressed on heat exchanger tube 8 or on tube sheet 7, top cover 1 bottom edge of baffle 15 and tube sheet 7 upper surface interval one fixed gap of vertical tube falling film evaporimeter form feed pathway, and the height of each blade screw part is feed pathway height; The width of each support chip and the distance between heat exchanger tube 8 inwall and baffle correspondence position outer wall closely cooperate, the support chip of each blade is abutted against between heat exchanger tube 8 inwall and baffle correspondence position outer wall, thus by baffle 15 activity or the heat exchanger tube 8 internal upper part relevant position being fixedly supported to vertical tube falling film evaporimeter.
Liquid enters from forming feed pathway between the bottom edge and tube sheet 7 end face of vertical tube falling film evaporimeter of top cover 1 with inside radial line, and spirally enter liquid distribution trough 14 along adjoining spiral blade, liquid is made more easily to be distributed to heat exchanger tube inwall, liquid enters after heat exchanger tube along under the surrounding concave surface spiral flow of baffle main body 1, when arriving bottom baffle main body 1, liquid flows to heat exchanger tube inwall with outside radial line; Strengthen heat transfer, prevent fouling.
The flow rate of liquid entering heat exchanger tube 8 is determined by the height of feed pathway.According to actual conditions, changed the height of feed pathway by the shape changing support component 5, thus regulate the flow of every root heat exchanger tube.
Embodiment 6
A kind of vertical tube falling film evaporimeter as shown in Figure 10, comprise the brine distribution case 13 being positioned at heat exchanger top, tube sheet 7, liquid distribution trough 14, heat exchanger tube 8, saline slot 9, circulating pump 10, first liquid circulation pipe 11, second liquid circulation pipe 12, saline slot 9 top is provided with several vertical heat exchanger tube 8, heat exchanger tube 8 top is provided with tube sheet 7, tube sheet 7 is in the correspondence position perforate on every root heat exchanger tube top, make it just can be fixed on heat exchanger tube 8 top, every root heat exchanger tube 8 is provided with a liquid distribution trough 14, the bottom of saline slot 9 is connected with the inlet of circulating pump 10 by first liquid circulation pipe 11, the liquid outlet of circulating pump 10 is connected with the brine distribution case 13 being positioned at heat exchanger top by second liquid circulation pipe 12, described liquid distribution trough 14 is arbitrary described liquid distribution trough in embodiment 1 ~ 5, and the baffle of described liquid distribution trough 14 is arranged at every root heat exchanger tube 8 internal upper part by support member supports.
When vertical tube falling film evaporimeter runs, salt solution in saline slot 9 is along first liquid circulation pipe 11 and second liquid circulation pipe 12, be transported to the brine distribution case 13 being positioned at heat exchanger top through circulating pump 10, spray on tube sheet 7 through brine distribution case 13, do not cross liquid distribution trough 14 top.Salt solution forms feed pathway between the top edge of feed pathway or baffle 15 concave surface and tube sheet 7 end face of vertical tube falling film evaporimeter and enters liquid distribution trough 14 from being formed between the bottom edge and tube sheet 7 end face of vertical tube falling film evaporimeter of top cover 1 with inside radial line, surrounding concave surface along baffle 15 flows down, when arriving bottom baffle 15, liquid flows to heat exchanger tube inwall with outside radial line, the salt solution being distributed to heat exchanger tube inwall evaporates through heat exchange, and remaining water flows into saline slot along heat exchanger tube 8.The steam produced is collected by the demister in vertical tube falling film evaporimeter.
The each parts of vertical tube falling film evaporimeter described in the present embodiment, except liquid distribution trough 14, are prior art.
Claims (1)
1. a vertical tube falling film evaporimeter liquid distribution trough, it is characterized in that described liquid distribution trough (14) is concave surface primarily of main body (6) surrounding and its top cover (1) basal cross section amasss the baffle (15) of heat exchanger tube (8) mouth of pipe sectional area being greater than vertical tube falling film evaporimeter, and by baffle (15) activity or heat exchanger tube (8) the internal upper part relevant position being fixedly supported to vertical tube falling film evaporimeter, the support component (5) making tube sheet (7) end face interval one fixed gap of top cover (1) bottom edge of baffle (15) and vertical tube falling film evaporimeter form feed pathway forms, liquid enters along the concave surface of described feed pathway, baffle (15) and is distributed in heat exchanger tube (8) inner surface,
The number of described support component (5) is 2 ~ 6, for polygon gusset, it is while be connected with the concave surface of baffle (15) is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component (5) relies on this adjacent is on the tube sheet (7) of vertical tube falling film evaporimeter, make baffle (15) movable or be fixedly supported to heat exchanger tube (8) the internal upper part relevant position of vertical tube falling film evaporimeter, top cover (1) bottom edge of baffle (15) and tube sheet (7) end face of vertical tube falling film evaporimeter form feed pathway;
Or described support component (5) is made up of the support chip of 3 ~ 6 blades and the connection downwards of lower end, each blade rear portion one being connected to the spirality of top cover (1) bottom surface, the diameter of a circle that each vane tip outer rim track is formed is slightly larger than the external diameter of heat exchanger tube (8), in the upper port making the tip of each blade be pressed on heat exchanger tube (8) or on the tube sheet (7) of vertical tube falling film evaporimeter, top cover (1) bottom edge of baffle (15) and tube sheet (7) end face interval one fixed gap of vertical tube falling film evaporimeter form feed pathway, the height of each blade screw part is feed pathway height, the width of each support chip and the distance between heat exchanger tube (8) inwall and baffle correspondence position outer wall closely cooperate, the support chip of each blade is abutted against between heat exchanger tube (8) inwall and baffle correspondence position outer wall, thus by baffle (15) activity or heat exchanger tube (8) the internal upper part relevant position being fixedly supported to vertical tube falling film evaporimeter.
2. vertical tube falling film evaporimeter liquid distribution trough according to claim 1, is characterized in that the basal diameter of described baffle main body (6) is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
3. vertical tube falling film evaporimeter liquid distribution trough according to claim 2, is characterized in that described baffle (15) is symmetrical along the central shaft of the heat exchanger tube (8) of vertical tube falling film evaporimeter; Top cover (1) is hemispherical, semiellipse shape, tabular, and basal cross section is long-pending is greater than heat exchanger tube mouth of pipe sectional area; Described baffle main body (6) surrounding is smooth concave surface; Or the main body of described baffle (6) forms by rounding stage body (2), cylinder (3), positive Rotary-table (4) seamless connectivity the entirety that surrounding is concave surface from top to bottom successively, rounding stage body (2) bottom surface is connected with the cylinder (3) identical with basal diameter, cylinder (3) bottom surface is connected with positive Rotary-table (4), and cylinder (3) basal diameter is identical with positive Rotary-table (4) end face diameter.
4. a vertical tube falling film evaporimeter liquid distribution trough, it is characterized in that described liquid distribution trough (14) primarily of surrounding be concave surface baffle (15), by baffle (15), movable or fixed support is connected to heat exchanger tube (8) the internal upper part relevant position of vertical tube falling film evaporimeter, makes the upper surface of baffle (15) expose heat exchanger tube (8) support component (5) composition suitable for reading; Described baffle (15) upper surface diameter is greater than the external diameter of heat exchanger tube (8), make interval one fixed gap between tube sheet (7) end face of the top edge of baffle (15) concave surface and vertical tube falling film evaporimeter form feed pathway, liquid enters along the concave surface of described feed pathway, baffle (15) and is distributed in heat exchanger tube (8) inner surface;
The number of described support component (5) is 2 ~ 6, for polygon gusset, while be connected with the concave surface of baffle (15) is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component (5) relies on this adjacent is on the tube sheet (7) of vertical tube falling film evaporimeter, make baffle (15) movable or be fixedly supported to heat exchanger tube (8) the internal upper part relevant position of vertical tube falling film evaporimeter, interval one fixed gap between tube sheet (7) end face of the top edge of baffle (15) concave surface and vertical tube falling film evaporimeter is made to form feed pathway.
5. vertical tube falling film evaporimeter liquid distribution trough according to claim 4, is characterized in that the basal diameter of described baffle (15) is more than or equal to 0.3 times of heat exchanger tube internal diameter, and is less than heat exchanger tube internal diameter.
6. vertical tube falling film evaporimeter liquid distribution trough according to claim 5, is characterized in that described baffle (15) is symmetrical along the central shaft of the heat exchanger tube of vertical tube falling film evaporimeter; Described baffle (15) surrounding is smooth concave surface; Or described baffle (15) forms by rounding stage body (2), cylinder (3), positive Rotary-table (4) seamless connectivity the entirety that surrounding is concave surface from top to bottom successively, rounding stage body (2) upper surface diameter is greater than the external diameter of heat exchanger tube (8), rounding stage body (2) bottom surface is connected with the cylinder (3) identical with basal diameter, cylinder (3) bottom surface is connected with positive Rotary-table (4), and cylinder (3) basal diameter is identical with positive Rotary-table (4) end face diameter.
7. vertical tube falling film evaporimeter liquid distribution trough according to claim 4, it is characterized in that described support component (5) is polygon gusset, while be connected with the concave surface of baffle (15) is seamless, have at least adjacent both sides mutually vertical in all the other each limits, the vertical frame side that support component (5) relies on this adjacent is on the tube sheet (7) of vertical tube falling film evaporimeter, make baffle (15) movable or be fixedly supported to heat exchanger tube (8) the internal upper part relevant position of vertical tube falling film evaporimeter, top cover (1) bottom edge of baffle (15) and tube sheet (7) end face of vertical tube falling film evaporimeter form feed pathway.
8. a vertical tube falling film evaporimeter, comprise the liquid distribution case (13) being positioned at heat exchanger top, tube sheet (7), liquid distribution trough (14), heat exchanger tube (8), saline slot (9), circulating pump (10), first liquid circulation pipe (11), second liquid circulation pipe (12), saline slot (9) top is provided with several vertical heat exchanger tube (8), heat exchanger tube (8) top is provided with tube sheet (7), tube sheet (7) is in the correspondence position perforate on every root heat exchanger tube (8) top, make it just can be fixed on heat exchanger tube (8) top, the bottom of saline slot (9) is connected with the inlet of circulating pump (10) by first liquid circulation pipe (11), the liquid outlet of circulating pump (10) is connected with the liquid distribution case (13) being positioned at heat exchanger top by second liquid circulation pipe (12), it is characterized in that described liquid distribution trough (14) liquid distribution trough according to any one of claim 1 or 4, the baffle (15) of described liquid distribution trough (14) is supported by support component (5) and is arranged at every root heat exchanger tube (8) internal upper part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210155135.6A CN102657948B (en) | 2012-05-16 | 2012-05-16 | Liquid distributor and vertical tube falling film evaporator comprising same |
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| CN201210155135.6A CN102657948B (en) | 2012-05-16 | 2012-05-16 | Liquid distributor and vertical tube falling film evaporator comprising same |
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| CN102657948A CN102657948A (en) | 2012-09-12 |
| CN102657948B true CN102657948B (en) | 2015-04-29 |
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| KR101635679B1 (en) * | 2014-09-25 | 2016-07-01 | 롯데케미칼 주식회사 | Falling film evaporation reactor for suppressing polymer gel formation |
| CN106267867B (en) * | 2015-05-13 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of falling film evaporator liquid distribution trough and falling film evaporator |
| CN106267868A (en) * | 2015-05-13 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of vertical tube falling vaporizer |
| CN105233517B (en) * | 2015-10-14 | 2017-03-29 | 长岭炼化岳阳工程设计有限公司 | Built-in falling film type reboiler rectifying column and its rectificating method |
| CN106693420B (en) * | 2015-11-12 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of falling film evaporator |
| CN105771558B (en) * | 2016-04-15 | 2018-07-06 | 重庆大学 | A kind of riser type falling liquid film device liquid distribution device of no external source driving |
| CN107362560B (en) * | 2016-12-30 | 2023-06-16 | 华北水利水电大学 | Two-phase countercurrent vertical in-tube falling film evaporator with circumferential tangential feeding |
| CN107261534B (en) * | 2017-07-16 | 2023-06-30 | 苏州卓群钛镍设备有限公司 | Liquid diversion distributor |
| CN108151576A (en) * | 2018-01-31 | 2018-06-12 | 丹阳同泰化工机械有限公司 | A kind of falling film type heater of special construction |
| CN108862438A (en) * | 2018-09-11 | 2018-11-23 | 首航洁能科技有限公司 | A kind of multiple-effect evaporation concentration systems of brine waste |
| CN109876482A (en) * | 2019-03-29 | 2019-06-14 | 无锡化工装备股份有限公司 | The porous injecting type liquid distribution device of vertical falling-film, liquid distribution method and application |
| CN114777553B (en) * | 2022-06-20 | 2022-09-16 | 常州中源工程技术有限公司 | Pipe body connecting structure, synchronous adjusting method for multiple groups of opposite insertion pipe bodies and falling film evaporator |
| CN115364789B (en) * | 2022-09-26 | 2024-05-03 | 株洲安特新材料科技有限公司 | A reation kettle for sodium antimonate production |
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| BRPI0614593A2 (en) * | 2005-08-09 | 2011-04-05 | Eestech Inc | manifold for a fluid medium in a heat exchanger, and heat exchanger |
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| CN202666436U (en) * | 2012-05-16 | 2013-01-16 | 江苏中圣高科技产业有限公司 | Liquid distributing device and falling-film evaporator provided with the same |
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