CN106595351A - Anti-scaling and de-scaling heat exchanger for fluidized bed - Google Patents
Anti-scaling and de-scaling heat exchanger for fluidized bed Download PDFInfo
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- CN106595351A CN106595351A CN201510666027.9A CN201510666027A CN106595351A CN 106595351 A CN106595351 A CN 106595351A CN 201510666027 A CN201510666027 A CN 201510666027A CN 106595351 A CN106595351 A CN 106595351A
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- heat exchanger
- distribution
- liquid
- solid particle
- scale removal
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
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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
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
Abstract
The invention relates to an anti-scaling and de-scaling heat exchanger for a fluidized bed. The anti-scaling and de-scaling heat exchanger is aimed at solving the technical problem in the prior art. Therefore, tube passes of a decarburized lye cooler of a synthetic ammonia device are not easily scaled. After long-term use, the heat exchange effect is still good. The anti-scaling and de-scaling heat exchanger is composed of a lower tube box 1, a heat exchanger tube array 2, an upper tube box 3, a liquid-solid separator 4, a descending tube 5, a solid particle groove 6, a liquid storage tank 7, a liquid circulating pump 8, a distribution box 9, a spherical plug 10, a baffle plate 11, a distribution disc 12, a distribution plate 13, slim tubes 14 and a lower-edge sleeve tube 15. An outlet of the distribution box 9 is connected with the slim tubes 14. The heat exchanger tube array 2 is connected with the upper tube box 3 connected with the liquid-solid separator 4. Solid phase enters the solid particle groove 6 through the descending tube 5. Liquid phase enters the liquid storage tank 7. The solid phase and liquid phase circulate to return the lower tube box 1. The anti-scaling and de-scaling heat exchanger for the fluidized bed has following beneficial effects: by adoption of the technical scheme, the above technical problem is solved; and the anti-scaling and de-scaling heat exchanger can be used for prolonging running cycle of the decarburized lye cooler of the synthetic ammonia device.
Description
Technical field
The invention belongs to chemical field, specifically, belongs to chemical industry heat transmission equipment long-term operation field, it is related to a kind of anti-scale removal
Fluid-bed heat exchanger, is widely used in solution tube side and walks liquid phase, and tube side is susceptible to the shell-and-tube heat exchanger of fouling and clogging
Long-term operation problem.
Background technology
Heat exchanger is widely used in industries such as oil, chemical industry, the energy.However, with the increase of use time, heat exchanger
Inevitably there is dirt adhesion, so as to the heat exchange efficiency for causing heat exchanger is reduced, resistance increases, and affects heat exchanger
Normal operation.Develop anti-scale removal fluid-bed heat exchanger and replace traditional heat exchangers, heat exchanger heat transfer effect can be improved, effectively
Extension fixture run time, with great economic benefit.Document US005676201A discloses a kind of external circulation fluidized bed
Heat exchanger.The fluid-bed heat exchanger does not take into full account the uniform problem of solid particle, thus heat-transfer effect ability is maintained under long period
It is not strong.Document CN202709856U discloses that a kind of level of application Kenics static mixers is liquid-solid circulating fluidized bed to change
Hot device.The fluid-bed heat exchanger solid particle is unable to Efficient Cycle and uniform, and is only used for horizontal heat exchanger.Document
CN102840578A discloses a kind of compact parallel connection type built-in fluid bed heat exchanger, but the fluid-bed heat exchanger does not consider solid yet
The uniform problem of body particle.In sum, the uniform problem for solving solid particle is to strengthen maintain under its long period heat-transfer capability
One of key technology.And prior art fails to solve this problem very well.
The present invention provides a kind of anti-scale removal fluid-bed heat exchanger, by be distributed case, tubule, lower edge sleeve pipe, ball plug, baffle plate,
The multiple equipment such as distributing disc and distribution grid is uniform in fluid-bed heat exchanger tube side to realize solid particle, targetedly solves
Determine the problems referred to above.
The content of the invention
The technical problem to be solved is the easy fouling of heat exchanger in prior art, and long period is obvious using rear heat transfer effect
Decline, there is provided a kind of anti-scale removal fluid-bed heat exchanger, the anti-scale removal fluid-bed heat exchanger has solid particulate distributions uniform, long
Cycle maintains the strong advantage of heat-transfer effect ability.
To solve above-mentioned technical problem, the technical solution adopted in the present invention is as follows：A kind of anti-scale removal fluid-bed heat exchanger, should
Anti- scale removal fluid-bed heat exchanger is by lower tube box 1, heat exchanger tube 2, upper tube box 3, liquid-solid separator 4, down-comer 5, solid
Body particle groove 6, liquid storage groove 7, liquid circulation pump 8, tubule 14 and lower edge sleeve pipe 15 are constituted.Wherein, lower tube box 1
Including distribution case 9, ball plug 10, baffle plate 11, distributing disc 12, distribution grid 13, ball plug 10 is arranged on distribution case 9
At lower inlet, baffle plate 11 is arranged on ball plug 10, and distributing disc 12 is arranged on baffle plate 11, distribution grid 13
On distributing disc 12, tubule 14 is connected at the distribution upper end outlet of case 9, lower edge set is installed in the lower end of heat exchanger tube 2
Pipe 15, heat exchanger tube 2 is connected with upper tube box 3, and the connection liquid-solid separator 4 of upper tube box 3, liquid-solid separator 4 is branched away
Two-way, all the way by the connection solid particle of down-comer 5 groove 6, another road liquid phase connects liquid storage groove 7, liquid storage groove 7 to solid phase
By the connection distribution case 9 of liquid circulation pump 8, solid particle groove 6 is connected into the pipeline from liquid circulation pump 8 to distribution case 9.
In above-mentioned technical proposal, the distribution case 9 is the tubaeform or cone of upper and lower opening.Divide the osculum of cloth case 9 straight
Footpath is identical with the entrance caliber of lower tube box 1, the distribution case 9 osculum end connection entrance of lower tube box 1, is distributed 9 big mouthfuls of diameters of case
It is identical with the diameter of lower tube box 1, distribution case 9 big opening end arrangement tubule 14.Distribution case 9 height is the length of heat exchanger tube 2
0.1～0.3 times.
In above-mentioned technical proposal, the tubule 14 is pipe.1.2～3 times of a diameter of Solids Particle Diameter of tubule 14, carefully
The length of pipe 14 is 8mm～15mm, and the quantity of tubule 14 is 2～4 times of the quantity of heat exchanger tube 2, can add on tubule 14
Dress shrouding.
In above-mentioned technical proposal, the caliber of lower edge sleeve pipe 15 is 0.4 times～0.6 times of heat exchanger tube 2, lower edge sleeve pipe
15 length are 15mm～50mm.From heat exchanger center to heat exchanger surrounding, the length of lower edge sleeve pipe 15 gradually increases.Heat exchange
The lower edge sleeve pipe 15 in device bosom does not set groove, not perforate.The lower edge sleeve pipe 15 of heat exchanger surrounding arranges groove obliquely,
Bevel angle is 15 degree～60 degree, and from heat exchanger center to heat exchanger surrounding, the bevel angle of lower edge sleeve pipe 15 is tapered into.
At least one hole is opened on the outer wall of lower edge sleeve pipe 15 of heat exchanger surrounding, open pore size is the 1.2～1.5 of solid particle average grain diameter
Times.
In above-mentioned technical proposal, 1.2～2 times of a diameter of entrance caliber of lower tube box 1 of the ball plug 10.
In above-mentioned technical proposal, the baffle plate 11 be flat, roof type, anti-roof type, square bevel-type, negative side's bevel-type or
One kind in propeller type.The central shaft of baffle plate 11 and the distribution central shaft of case 9 and the center overlapping of axles of lower tube box 1.Baffle plate 11
The maximum length of upright projection is less than or equal to 0.3 times of the diameter of lower tube box 1.
In above-mentioned technical proposal, the distributing disc 12 opens the rotary body of aperture for periphery, wherein rotary body be cylinder, circular cone,
One kind in round platform or semi-round ball.The central shaft of distributing disc 12 and the center overlapping of axles of lower tube box 1.The upright projection of distributing disc 12
Maximum length is less than or equal to 0.3 times of the diameter of lower tube box 1.Maximum length of the height of distributing disc 12 less than or equal to its upright projection.
The percent opening of distributing disc 12 is 40%～70%, and open pore size is 1.5～2 times of solid particle average grain diameter.The distance of distributing disc 12
The distance of baffle plate 11 is more than or equal to 30mm.
In above-mentioned technical proposal, the distribution grid 13 is porous plate.The Facad structure of distribution grid 13 is round, ring-like, fin
One kind in type or grizzly bar type.The side structure of distribution grid 13 is plane, upper convex, lower convex, convex lens type or recessed type
In one kind.Distribution grid 13 leaves the distance of distributing disc 12 and is more than or equal to 30mm.The a diameter of He of baffle plate 11 of distribution grid 13
1.5～2 times of the upright projection maximum length the greater of distributing disc 12.The thickness of fabric swatch 13 is 5mm～10mm.Fabric swatch 13 is opened
Porosity is 50%～80%, opening diameter more than or equal to 2 times of solid particle average grain diameter, for any two perforate, away from
From the remote open pore size in the center of distribution grid 13 more than or equal to the open pore size close to the center of range distribution plate 13.
In above-mentioned technical proposal, the liquid-solid separator 4 is one kind of gravity sedimentation type or cyclone separator.
In above-mentioned technical proposal, the solid particle that the anti-scale removal fluid-bed heat exchanger is used is inert particle, refers specifically to heap
Density is more than density of liquid phase, with certain degree of hardness and intensity, and the solid not reacted with medium in use occasion system
Grain, it is preferred zirconium silicate pearl, corundum ball, porcelain ball, alumina bead, zirconium silicate pearl, bead, steel ball, engineering plastics, poly-
One or more in formaldehyde particles, polytetrafluoroethylgranule granule, handstone, wire, the glueballs of chopping, more preferably glass
Pearl, alumina bead and zirconium silicate pearl.Solid particle average grain diameter is 2mm～5mm.Solid particle is in the anti-scale removal stream
Average external volume solid holdup in heat exchanger of fluidized bed is 3%～8%.
To solve above-mentioned technical problem, using a kind of method of anti-scale removal fluid-bed heat exchanger.Anti- scale removal fluid-bed heat exchanger row
The interior circulation water of pipe 2, shell side circulation synthesis ammonia lean solution.
In said method, water squeezes into distribution case 9 Jing after liquid circulation pump 8 from liquid storage groove 7, with solid in distribution case 9
After grain mixing, solid particle is fluidized；Liquid-solid mixture squeeze sequentially pass through after ball plug 10 baffle plate 11, distributing disc 12,
Distribution grid 13, by entering lower edge sleeve pipe 15 after tubule 14, solid particle enters heat exchanger tube 2 along lower edge sleeve pipe 15,
Wash away the wall of heat exchanger tube 2 repeatedly under fluidized state, under the washing away of solid particle, dirt is difficult in heat exchanger tube
2 walls are adhered to and tie poly-；Synthesis ammonia lean solution in tube side in water and shell side completes heat exchange.
In said method, solid particle and water are circulated in anti-scale removal fluid-bed heat exchanger.
In said method, the operated in flow rate scope of water is 1.5m/s～4m/s in anti-scale removal fluid-bed heat exchanger tubulation 2.
In technical scheme and method, the lower edge sleeve pipe 15, distribution case 9, ball plug 10, baffle plate 11, point
The material of cloth disk 12, distribution grid 13 and tubule 14 is stainless steel or inert material, preferred 316L stainless steels or tetrafluoroethene.
In technical scheme and method, Numerical heat transfer system is come with the temperature difference and heat flux of inner wall temperature and main flow temperature
Number, with the fouling condition for maintaining the time length Changing Pattern of certain heat transfer coefficient to judge fluid-bed heat exchanger, so as to conduct
The basis for estimation of heat-transfer effect ability is maintained under long period.
Using technical scheme, it is a kind of by lower tube box 1, heat exchanger tube 2, upper tube box 3, liquid-solid separator 4,
What down-comer 5, solid particle groove 6, liquid storage groove 7, liquid circulation pump 8, tubule 14, lower edge sleeve pipe 15 were constituted, under
Bobbin carriage 1 includes distribution case 9, ball plug 10, baffle plate 11, distributing disc 12 and distribution grid 13, the lower end of heat exchanger tube 2 peace
The anti-scale removal fluid-bed heat exchanger along sleeve pipe 15 is loaded, heat transfer coefficient after continuous operation 124 days is achieved and is still maintained original
95% preferable technique effect.
Description of the drawings
Fig. 1 is the schematic diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
Fig. 2 is the distribution case and tubule connection diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
Fig. 3 is the lower edge sleeve pipe schematic diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
Fig. 4 is the baffle plate schematic diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
Fig. 5 is the distributing disc schematic diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
Fig. 6 is the distribution grid schematic diagram of anti-scale removal fluid-bed heat exchanger of the present invention.
In Fig. 1,1 is lower tube box；2 is heat exchanger tube；3 is upper tube box；4 is liquid-solid separator；5 is down-comer；6
For solid particle groove；7 is liquid storage groove；8 is liquid circulation pump；9 are distribution case；10 is ball plug；11 is baffle plate；
12 is distributing disc；13 is distribution grid；14 is tubule；15 is lower edge sleeve pipe.Wherein, ball plug 10, baffle plate 11, point
Cloth disk 12 and distribution grid 13 are arranged within distribution case 9.Ball plug 10 is arranged at the distribution lower inlet of case 9, spherical
Plug 10 installs overhead gage 11, and distributing disc 12 is installed on baffle plate 11, and distribution grid 13 is installed on distributing disc 12, is distributed case 9
Connect tubule 14 at upper end outlet, lower edge sleeve pipe 15, the upper end of heat exchanger tube 2 and upper pipe are installed in the lower end of heat exchanger tube 2
Case 3 is connected, and the connection liquid-solid separator 4 of upper tube box 3, liquid-solid separator 4 out divides two-way, and all the way solid phase passes through down-comer
5 connection solid particle grooves 6, another road liquid phase connects liquid storage groove 7, and liquid storage groove 7 connects down tube by liquid circulation pump 8
Case 1, solid particle groove 6 is connected into the pipeline from liquid circulation pump 8 to lower tube box 1.
Liquid squeezes into lower tube box 1 Jing after liquid circulation pump 8 from liquid storage groove 7, and solid particle is introduced after lower tube box 1 and liquid
Mix, in distribution case 9, after squeezing ball plug 10, sequentially enter baffle plate 11, distributing disc 12 and distribution grid 13,
Then by tubule 14 enter lower edge sleeve pipe 15, hence into and wash away heat exchanger tube 2, solid particle is out entered afterwards
Upper tube box 3, enters back into liquid-solid separator 4, and liquid phase and solid phase are separated in liquid-solid separator 4, and liquid phase circulation returns liquid storage
Groove 7, solid phase enters solid particle groove 6, the solid particle got off from solid particle groove 6 and circulation fluid after down-comer 5
Mix, be again introduced into lower tube box 1, complete solid particle circulation.As shown in figure 3, lower edge sleeve pipe adopts undergauge pattern,
Local decompression is formed, solid particle is easily entered.The groove of lower edge sleeve pipe is further ensured that solid particle point with aperture is opened
Cloth is uniform.
Distributing disc 12 and the perforate mode of distribution grid 13 of the present invention is not terminated in shown in Fig. 5 and Fig. 6.
Below by embodiment and comparative example, the present invention is further elaborated, but the method for the present invention is not limited to that.
Specific embodiment
With reference to embodiment, the method for the present invention is further illustrated.
【Embodiment 1】
Using the anti-scale removal fluid-bed heat exchanger shown in Fig. 1, certain synthetic ammonia installation decarbonization system alkali solution cooler is applied to, should
442 heat exchanger tubes, every pipe range 4800mm are set in anti-scale removal fluid-bed heat exchanger, caliber is 22 × 1.5mm of Φ,
Pipe is in equilateral triangle arrangement.Solid particle adopts bead, average grain diameter 5mm, and solid particle is in the anti-scale removal fluid bed
Average external volume solid holdup in heat exchanger is 3%.Liquid phase is water, and flow velocity is 1.5m/s.Distribution case is cone shown in Fig. 2.
Distribution case height 480mm.Distribution tubule 1768, diameter 6mm, length 8mm.Lower edge sleeve pipe caliber 12mm, row
Cloth is：It is most middle 1, length 15mm, square groove, not perforate；It is middle 7 layers totally 183, length 20mm, slope
60 degree of mouth, opens a hole, and aperture 6mm, 4 layers of outside totally 258, length 30mm, 45 degree of groove opens two holes,
Aperture 7.5mm.2 times of a diameter of lower tube box import caliber of ball plug.Baffle plate is flat, its upright projection shown in Fig. 4
Maximum length is 0.1 times of lower tube box diameter.Distributing disc is column type shown in Fig. 5, and its diameter and height are 0.1 times of down tube
Case diameter, percent opening 40%, aperture 8mm, apart from baffle plate 30mm.Distribution grid is that individual layer plane fin-type shown in Fig. 6 is more
Orifice plate, a diameter of 0.15 times of lower tube box diameter, thickness 5mm, percent opening 50%, minimum-value aperture 10mm, range distribution
Disk 40mm.Under the conditions of being somebody's turn to do, heat transfer coefficient is still original 95% after continuously running 92 days.
【Embodiment 2】
Certain synthetic ammonia installation decarbonization system alkali lye cooling is applied to using with the anti-scale removal fluid-bed heat exchanger of the identical of embodiment 1
Device, solid particle adopts bead, average grain diameter 2mm, average body of the solid particle in the anti-scale removal fluid-bed heat exchanger
Product solid holdup is 8%.Liquid phase is water, and flow velocity is 4m/s.Distribution case is tubaeform shown in Fig. 2.Distribution case height 1440mm.
Distribution tubule 1768, a diameter of 6mm, length 15mm.Lower edge sleeve pipe caliber is 7.5mm, and arranging is：It is most middle
1, length 20mm, square groove, not perforate；Middle 7 layers totally 183, length 30mm, 30 degree of groove opens one
Individual hole, aperture 3mm, 4 layers of outside totally 258, length 50mm, 15 degree of groove opens two holes, aperture 2.5mm.
1.2 times of a diameter of lower tube box import caliber of ball plug.Baffle plate be anti-roof type shown in Fig. 4, its upright projection maximum length
For 0.3 times of lower tube box diameter.Distributing disc is pyramid type shown in Fig. 5, and it is straight that its go to the bottom diameter and height are 0.3 times of lower tube box
Footpath, percent opening 70%, aperture is 4mm, apart from baffle plate 40mm.Distribution grid is convex rounded porous on individual layer shown in Fig. 6
Plate, a diameter of 0.6 times of lower tube box diameter, thickness 10mm, percent opening 80%, minimum-value aperture 6mm, range distribution disk 30mm.
Under the conditions of being somebody's turn to do, heat transfer coefficient is still original 95% after continuously running 110 days.
【Embodiment 3】
Certain synthetic ammonia installation decarbonization system alkali lye cooling is applied to using with the anti-scale removal fluid-bed heat exchanger of the identical of embodiment 1
Device, solid particle adopts alumina bead, and average grain diameter 5mm, solid particle is average in the anti-scale removal fluid-bed heat exchanger
Volume solid holdup is 3%.Liquid phase is water, and flow velocity is 1.5m/s.Distribution case is cone shown in Fig. 2.Distribution case height 480mm.
Distribution tubule 1326, diameter 6mm, length 8mm.Lower edge sleeve pipe caliber is 12mm footpaths, and arranging is：Most middle 1
Root, length 15mm, square groove, not perforate；Totally 183, intermediate layer 7, length 20mm, 60 degree of groove opens one
Hole, aperture 6mm, 4 layers of outside totally 258, length 30mm, 30 degree of groove opens a hole, aperture 6mm.Ball
2 times of a diameter of lower tube box import caliber of shape plug.Baffle plate is propeller type shown in Fig. 4, and its upright projection maximum length is 0.1
Times lower tube box diameter.Distributing disc is circular platform type shown in Fig. 5, and its a diameter of 0.1 times of lower tube box diameter of going to the bottom, is highly 0.08
Times lower tube box diameter, percent opening 40%, aperture is 8mm, apart from baffle plate 30mm.Distribution grid is convex under individual layer shown in Fig. 6
Type grizzly bar type porous plate, a diameter of 0.15 times of lower tube box diameter, thickness 10mm, percent opening 50%, minimum-value aperture 10mm,
Range distribution disk 30mm.Under the conditions of being somebody's turn to do, heat transfer coefficient is still original 95% after continuously running 86 days.
【Embodiment 4】
Certain synthetic ammonia installation decarbonization system alkali lye cooling is applied to using with the anti-scale removal fluid-bed heat exchanger of the identical of embodiment 1
Device, solid particle adopts alumina bead, and average grain diameter 2mm, solid particle is average in the anti-scale removal fluid-bed heat exchanger
Volume solid holdup is 8%.Liquid phase is water, and flow velocity is 4m/s.Distribution case is tubaeform shown in Fig. 2.Distribution case height 1440mm.
Distribution tubule 884, diameter 6mm, length 15mm.Lower edge sleeve pipe caliber is 7.5mm, and arranging is：It is most middle 1,
Length 20mm, square groove, not perforate；Middle 7 layers totally 183, length 30mm, 45 degree of groove opens two holes,
Aperture 3mm, 4 layers of outside totally 258, length 50mm, 15 degree of groove opens two holes, aperture 3mm.Ball plug
1.2 times of a diameter of lower tube box import caliber.Baffle plate is negative side's bevel-type shown in Fig. 4, and its upright projection maximum length is 0.3
Times lower tube box diameter.Distributing disc is semicircle ball-type shown in Fig. 5, and its a diameter of 0.3 times of lower tube box diameter, is highly 0.25 times
Lower tube box diameter, percent opening 70%, aperture is 4mm, apart from baffle plate 40mm.Distribution grid is the recessed type of individual layer shown in Fig. 6
Circular ring type porous plate, a diameter of 0.6 times of lower tube box diameter, thickness 5mm, percent opening 80%, minimum-value aperture 6mm, away from
From distributing disc 40mm.Under the conditions of being somebody's turn to do, heat transfer coefficient is still original 95% after continuously running 124 days.
【Comparative example 1】
Certain synthetic ammonia installation decarbonization system alkali solution cooler is applied to using fluid-bed heat exchanger, the fluid-bed heat exchanger reference and
The anti-scale removal fluid-bed heat exchanger of the identical of embodiment 1, is simply not provided with being distributed case, ball plug, baffle plate, distributing disc, distribution
Plate, tubule and lower edge sleeve pipe, solid particle adopts bead, average grain diameter 2mm, and solid particle is in the fluid-bed heat exchanger
Interior average external volume solid holdup is 8%.Liquid phase is water, and flow velocity is 4m/s.Under the conditions of being somebody's turn to do, continuous operation is conducted heat after 71 days and is
Number is changed into original 95%.
【Comparative example 2】
Using certain traditional synthetic ammonia installation decarbonization system alkali solution cooler, liquid phase is water, and flow velocity is 4m/s, and continuous operation is only
Heat transfer coefficient is just original 95% after 34 days.
Claims (10)
1. a kind of anti-scale removal fluid-bed heat exchanger, it is characterised in that anti-scale removal fluid-bed heat exchanger by lower tube box (1), change
Hot device tubulation (2), upper tube box (3), liquid-solid separator (4), down-comer (5), solid particle groove (6), liquid
Body storage tank (7), liquid circulation pump (8), tubule (14), wherein lower edge sleeve pipe (15) composition, lower tube box (1)
Including distribution case (9), ball plug (10), baffle plate (11), distributing disc (12), distribution grid (13), ball plug
(10) installed in distribution case (9) lower inlet at, baffle plate (11) on ball plug (10), distributing disc (12)
On baffle plate (11), distribution grid (13) is distributed case (9) upper end outlet on distributing disc (12)
Place's connection tubule (14), heat exchanger tube (2) lower end is installed by lower edge sleeve pipe (15), heat exchanger tube (2) and upper pipe
Case (3) is connected, and upper tube box (3) connection liquid-solid separator (4), liquid-solid separator (4) branches away two-way, solid all the way
Mutually solid particle groove (6), another road liquid phase connection liquid storage groove (7), liquid storage groove (7) are connected by down-comer (5)
By liquid circulation pump (8) connection distribution case (9), solid particle groove (6) is connected into from liquid circulation pump (8) to distribution
The pipeline of case (9).
2. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the distribution case (9) is upper
The tubaeform or cone of under shed, distribution case (9) osculum diameter is identical with lower tube box (1) entrance caliber, is distributed case
(9) osculum end connection lower tube box (1) entrance, the big mouth diameter of distribution case (9) is identical with lower tube box (1) diameter, point
Cloth case (9) big opening end arrangement tubule (14)；Distribution case (9) is highly 0.1～0.3 times of heat exchanger tube (2) length；
Tubule (14) is pipe, and 1.2～3 times of a diameter of Solids Particle Diameter of tubule (14), tubule (14) length is 8mm～15mm,
Tubule (14) quantity is 2～4 times of heat exchanger tube (2) quantity, and tubule can install shrouding additional on (14).
3. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the lower edge sleeve pipe (15)
Caliber is 0.4 times～0.6 times of heat exchanger tube (2) caliber；Lower edge sleeve pipe (15) length is 15mm～50mm；From changing
To heat exchanger surrounding, lower edge sleeve pipe (15) length gradually increases at Re Qi centers；The lower edge sleeve pipe (15) in heat exchanger bosom
Groove, not perforate are not set；The lower edge sleeve pipe (15) of heat exchanger surrounding arranges groove obliquely, and bevel angle is 15 degree～60
Degree, from heat exchanger center to heat exchanger surrounding, lower edge sleeve pipe (15) bevel angle is tapered into；The lower edge of heat exchanger surrounding
At least one hole is opened on sleeve pipe (15) outer wall, open pore size is 1.2～1.5 times of solid particle average grain diameter.
4. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the ball plug (10) is straight
Footpath is 1.2～2 times of lower tube box (1) entrance caliber.
5. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the baffle plate (11) is flat
One kind in board-like, roof type, anti-roof type, square bevel-type, negative side's bevel-type or propeller type.Baffle plate (11) central shaft and
Distribution case (9) central shaft and lower tube box (1) center overlapping of axles.The maximum length of baffle plate (11) upright projection less than etc.
In 0.3 times of lower tube box (1) diameter；The distributing disc (12) opens the rotary body of aperture for periphery, and wherein rotary body is circle
One kind in post, circular cone, round platform or semi-round ball；Distributing disc (12) central shaft and lower tube box (1) center overlapping of axles；Point
The maximum length of cloth disk (12) upright projection is less than or equal to 0.3 times of lower tube box (1) diameter；Distributing disc (12) is highly little
In the maximum length equal to its upright projection；Distributing disc (12) percent opening is 40%～70%, and open pore size is solid particle
1.5～2 times of average grain diameter；Distributing disc (12) is more than or equal to 30mm apart from the distance of baffle plate (11).
6. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the distribution grid (13) is
Porous plate；Distribution grid (13) Facad structure is round, ring-like, fin-type or the one kind in grizzly bar type；Distribution grid (13)
Side structure is the one kind in plane, upper convex, lower convex, convex lens type or recessed type；Distribution grid (13) range distribution
The distance of disk (12) is more than or equal to 30mm；The a diameter of baffle plate (11) of distribution grid (13) and distributing disc (12) are vertically thrown
1.5～2 times of shadow maximum length the greater；Distribution grid (13) thickness is 5mm～10mm；Distribution grid (13) percent opening is
50%～80%, opening diameter is more than or equal to 2 times of solid particle average grain diameter, for any two perforate, range distribution plate
(13) the remote open pore size in the center open pore size near more than or equal to range distribution plate (13) center.
7. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the liquid-solid separator (4)
It is one kind of gravity sedimentation type or cyclone separator.
8. anti-scale removal fluid-bed heat exchanger according to claim 1, it is characterised in that the anti-scale removal fluid bed is changed
The solid particle that hot device is used is that heap density is more than density of liquid phase, and the inertia not reacted with medium in use occasion system
Particle；Solid particle average grain diameter is 2mm～5mm；Solid particle is average in the anti-scale removal fluid-bed heat exchanger
Volume solid holdup is 3%～8%.
9. a kind of method for preventing synthetic ammonia installation decarburization alkali solution cooler fouling, using any one in claim 1～8
Plant anti-scale removal fluid-bed heat exchanger, it is characterised in that heat exchanger tube (2) interior circulation water, shell side circulation synthesis ammonia lean solution；
Water squeezes into distribution case (9) Jing after liquid circulation pump (8) from liquid storage groove (7), mixes with the interior solid particle of distribution case (9)
After conjunction, solid particle is fluidized；Liquid-solid mixture squeeze sequentially pass through after ball plug (10) baffle plate (11), distributing disc (12),
Distribution grid (13), by after tubule (14) along lower edge sleeve pipe (15) into heat exchanger tube (2), solid particle
Wash away heat exchanger tube (2) wall repeatedly under fluidized state, under the washing away of solid particle, dirt is difficult in heat exchanger
Tubulation (2) wall is adhered to and ties poly-；Synthesis ammonia lean solution in tube side in water and shell side completes heat exchange；Solid particle and water exist
Circulate in anti-scale removal fluid-bed heat exchanger.
10. the method for preventing synthetic ammonia installation decarburization alkali solution cooler fouling according to claim 9, it is characterised in that
The operated in flow rate scope of the interior water of the anti-scale removal fluid-bed heat exchanger tubulation (2) is 1.5m/s～4m/s.
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| CN107394964A (en) * | 2017-08-08 | 2017-11-24 | 北京必可测科技股份有限公司 | A kind of descaling and antiscaling engine cooler and antiscaling method |
| CN107421347A (en) * | 2017-08-18 | 2017-12-01 | 北京必可测科技股份有限公司 | Save antiscale condenser arrangement |
| CN109654912A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | Particle walks the horizontal type fluidized-bed heat exchanger of shell side |
| CN109654924A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | Particle walks the vertical fluidized bed heat exchanger of shell side |
| CN109748253A (en) * | 2018-12-19 | 2019-05-14 | 安徽节源环保科技有限公司 | A method of improving wet-process phosphoric acid concentration heat exchanger fouling |
| CN111686463A (en) * | 2019-03-12 | 2020-09-22 | 天津大学 | Automatic particle adding technology in scale prevention and removal and heat transfer enhancement of circulating fluidized bed |
| CN114076527A (en) * | 2020-08-13 | 2022-02-22 | 中国石油化工股份有限公司 | Fluidized bed heat exchanger |
| CN116045724A (en) * | 2023-01-04 | 2023-05-02 | 浙江兰通空调设备有限公司 | Plate heat exchanger |
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| CN107394964A (en) * | 2017-08-08 | 2017-11-24 | 北京必可测科技股份有限公司 | A kind of descaling and antiscaling engine cooler and antiscaling method |
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| CN109654924A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | Particle walks the vertical fluidized bed heat exchanger of shell side |
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| CN114076527A (en) * | 2020-08-13 | 2022-02-22 | 中国石油化工股份有限公司 | Fluidized bed heat exchanger |
| CN114076527B (en) * | 2020-08-13 | 2024-03-26 | 中国石油化工股份有限公司 | Fluidized bed heat exchanger |
| CN116045724A (en) * | 2023-01-04 | 2023-05-02 | 浙江兰通空调设备有限公司 | Plate heat exchanger |
| CN116045724B (en) * | 2023-01-04 | 2023-08-08 | 浙江兰通空调设备有限公司 | Plate heat exchanger |
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