CN110251982A - A kind of liquid distribution device and method of high operating flexibility - Google Patents
A kind of liquid distribution device and method of high operating flexibility Download PDFInfo
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- CN110251982A CN110251982A CN201910635882.1A CN201910635882A CN110251982A CN 110251982 A CN110251982 A CN 110251982A CN 201910635882 A CN201910635882 A CN 201910635882A CN 110251982 A CN110251982 A CN 110251982A
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- liquid
- distributor
- pipe
- dispensing tube
- distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
Abstract
It includes liquid distribution trough and liquid distribution control system that the present invention, which discloses a kind of high operating flexibility liquid distribution device and method, the device,.Liquid distribution trough includes the first feed pipe, the first liquid dispensing tube, the first liquid distributor, the second feed pipe, second liquid distribution pipe, the second liquid distributor, is evenly equipped with equidistant liquid distributing hole on the first liquid distributor and the second liquid distributor center of underside line；Liquid distribution control system includes the first control valve, the second control valve, flowmeter, flow control interlock system.The efficient initial distribution of liquid in rectifying column can be achieved in the present invention, plays higher packing efficiency, has bigger operating flexibility, stable operation can be achieved up to 1:13 in liquid distribution trough maximum operating flexibility in full load, have lower occupy-place height, tower body height is reduced, manufacturing cost is reduced.
Description
Technical field
The present invention relates to the liquid distribution devices and location mode of a kind of high operating flexibility, particularly for stuffing rectification column liquid
Body is distributed a kind of liquid distribution device of high operating flexibility in field.
Background technique
Liquid distribution trough is located at packing layer upper end, and liquid is uniformly distributed in filler surface by it, forms liquid initial point
Cloth.In stuffing rectification column, liquid initial distribution play the role of to the performance of tower it is vital, when liquid initial distributed mass
When declining 40%, packing layer theoretical stage reduces by 50% or so, therefore liquid distribution trough is most important tower internals.
Liquid distribution trough, which presses out liquid motive force, can be divided into gravity-type and two kinds of pressure-type.Gravity liquid distributor leans on liquid level
(gravity) is distributed liquid, easily reaches liquid distribution uniformly and stable operation etc. requires.But the liquid level tube of gravity-type it is still necessary to
The height of 200-500mm, causes tower height degree to increase, and increases equipment manufacturing cost.A kind of double-deck calandria liquid of telescopic liquid level tube
Distributor has the characteristics that increase operating flexibility, but as load increases, there are unstable operating point, i.e. flow increases to
Just beyond the upper edge of interior liquid pipe, when flow is not further added by, then outer liquid level tube liquid level is very low, is insufficient to allow upper layer liquid distributing hole uniform
Ground trickle, liquid distribution quality is deteriorated at this time.Liquid is sent into liquid distribution by the pressure head pumped by pressure-type liquid distribution trough
Device, pressure-type liquid distribution trough are lower to installation level requirement, and footprint is small, and structure is simple, but operating flexibility is smaller,
Generally 1:3.
CN203778051U describes a kind of composite tube type liquid distribution device, is in the nature second level tubular type liquid distribution
Device belongs to gravity liquid distributor, although its structure has biggish operating flexibility, second level tubular type liquid distribution trough is deposited
In a unstable fixed point, liquid distribution unevenness is easy to appear in point operation.
CN106390863A introduces a kind of high distributing homogeneity calandria liquid distributors with not isometrical liquid outlet, leads to
Crossing its liquid distribution trough can realize that the height of liquid is uniformly distributed, but still remain the disadvantage of operating flexibility deficiency, for interval
The bigger situation of this operating condition load change range of rectifying hardly results in the high quality distribution under small, middle and high regurgitant volume.
CN206027379U describes a kind of liquid distribution trough for absorption tower, and structure type can be grasped on absorption tower
Work is when changing, and realizes being uniformly distributed for liquid, but for batch fractionating tower, especially with the batch fractionating tower of reaction kettle,
Still remain the inadequate problem of operating flexibility.
In batch production process, especially when rectifying column is connected with batch reactor, rectifying column load is changed over time
Very big, conventional liquid distribution trough is difficult to realize the distribution of the high quality liquid in entire production process.
Summary of the invention
The technical problem to be solved by the invention is to provide the liquid distribution devices and method of a kind of high operating flexibility, especially
It can be used for rectifying column, realize under the biggish operating condition of rectifying column load variations range, liquid uniformly divides within the scope of whole operation
Cloth is especially apparent batch reactive distillation process effect.For maximum operating flexibility of the invention up to 1:13, the interior operation of full load is steady
It is fixed, the liquid initial distribution of high quality can be provided for rectifying column.It, not only can be real by using liquid distribution device of the invention
The liquid distribution of existing high quality, while having that at low cost, pressure drop is small, operating flexibility is high, the low advantage of equipment occupy-place height.
According to the first aspect of the invention, a kind of high operating flexibility liquid distribution device is provided comprising liquid distribution
Device and liquid distribution control system, liquid distribution trough are arranged in tower (such as stuffing rectification column) or reactor, and especially top is empty
In, the liquid distribution trough includes the first feed pipe for material to be input to liquid distribution trough, with the first feed pipe
First liquid dispensing tube of end connection, connect with the first liquid dispensing tube and is distributed in the first liquid dispensing tube longitudinal direction two sides
Two column (for example, 2 × 4 or 2 × 6 or 2 × 8 or 2 × 10 or 2 × 12) first liquid distributors, for inputting material
To the second feed pipe of liquid distribution trough, be located at the first liquid dispensing tube below or above, intersect with the first liquid dispensing tube and
Connect with the second feed pipe second liquid distribution pipe (preferably the first liquid dispensing tube and the square crossing of second liquid distribution pipe,
It is preferred that in respectively midpoint intersection or the square crossing of the first liquid dispensing tube and second liquid distribution pipe), it is distributed with second liquid
Pipe connect and be distributed in second liquid distribution pipe longitudinal direction two sides two column (for example, 2 × 4 or 2 × 6 or 2 × 8 or 2 ×
10 or 2 × 12) the second liquid distributor, the second liquid distributor is integrally located at the below or above of the first liquid distributor, two the first cloth of column
Multiple liquid distributing holes (being preferably evenly equipped with equidistant liquid distributing hole) is distributed in the bottom side of each of liquid pipe and two the second liquid distributors of column,
The internal diameter of second liquid distribution pipe is greater than the internal diameter (such as big 5-20mm) of the first liquid dispensing tube, and the internal diameter of the second liquid distributor is big
In the internal diameter (such as big 5-20mm) of the first liquid distributor；The liquid distribution control system includes the tower for being set to the first feed pipe
For control the first control valve of the first feed pipe flow on outer or reactor outer portion, be set to the tower of the second feed pipe outside or
For controlling the second control valve of the second feed pipe flow on reactor outer portion, it is set to the first feed pipe and the second feed pipe
Flowmeter on combined main pipeline, the flow control that the first and second control valve is adjusted or controlled according to flowmeter measurements interlock
System.The flow control interlock system and flowmeter and the first, second control valve communicate to connect.
Further, the junction of the first feed pipe and the first liquid dispensing tube is located at the midpoint of the first liquid dispensing tube,
Second feed pipe is divided into two branch pipes and is connected in the second liquid distribution pipe of the first liquid dispensing tube two sides.One
As, the first feed pipe turns back be connected to the first liquid dispensing tube downward vertically in the top at the midpoint of the first liquid dispensing tube
Midpoint, the second feed pipe branch into two branch pipes to two sidesways (right above preferably) above the midpoint of second liquid distribution pipe
Row, second liquid distribution pipe midpoint two sides (position at the two lateral extents midpoint be about second liquid distribution pipe endpoint away from
From the 1/6~3/5 of midpoint, such as it 1/4) is connected to second liquid distribution pipe downward vertically.
Further, the first charging bore is 20-60mm, preferably 25~50mm；Second charging bore is 35-
75mm, preferably 40~65mm, the internal diameter for two branch pipes that usual second feed pipe separates are 25~50mm.
Further, the first liquid dispensing tube with second liquid distribution pipe is orthogonal divides equally, the first and second liquid dispensing tube
Determined with the length of the first and second liquid distributor by tower diameter or reactor inside diameter, normally, from close to the first liquid dispensing tube midpoint and
Second liquid distribution pipe midpoint is to the direction of the first liquid dispensing tube and the both ends of second liquid distribution pipe, two the first liquid distributors of column
It is gradually reduced (so that circle is presented in the exterior contour of two the first liquid distributors of column and the second liquid distributor) with the length of the second liquid distributor,
To adapt to the tower or reactor of circular cross-section.The round diameter that the exterior contour of two the first liquid distributors of column and the second liquid distributor is formed
And the difference of tower internal diameter or reactor inside diameter is 1-3 times of liquid distributing hole spacing.
Further, first liquid dispensing tube, second liquid distribution pipe both ends are equipped with closure ring flange, the first liquid
Multiple diameter 2-10mm, the preferably drain hole of 3-8mm are opened up on both body distribution pipe, second liquid distribution pipes bottom centerline
(and liquid distributing hole), spacing are generally 50-120mm, preferably 60-110mm, more preferable 70-100mm, the first liquid dispensing tube,
Two liquid dispensing tube two sides are separately connected two the first liquid distributors of column, the second liquid distributor, and preferably all first liquid distributors are located at same
Plane and all second liquid distributors are generally aligned in the same plane.First liquid dispensing tube internal diameter is generally 20-60mm, preferably 25-50mm,
Second liquid distribution bore is generally 35-75mm, preferably 40-65mm, and the first liquid distributor internal diameter is 10-20mm, for example, about
15mm, the second liquid distributor caliber are the liquid dispensing tube caliber of 15-30mm, preferably 20-25mm, first, second respectively preferably the
One, 1.2-4 times of the second liquid distributor caliber.
Further, first liquid distributor, the second liquid distributor bottom are provided with equidistant liquid distributing hole, such as guaranteeing
Liquid is evenly distributed on packing layer, and liquid distributing hole aperture is generally 2-10mm, preferably 3-8mm.
Preferably, the liquid distributing hole spacing on the first liquid distributor and the second liquid distributor can be 50-120mm, preferably 60-
110mm, more preferable 70-100mm, liquid distributing hole density (including described drain hole) can be 50-300/m2(tower or reactor cross section
Product).
Preferably, the liquid distributing hole aperture of the second liquid distributor is greater than the aperture of the liquid distributing hole of the first liquid distributor, such as big 1-
4mm, preferably 2-3mm.The liquid distributing hole aperture of first liquid distributor is generally 2-5mm, preferably 3-4mm, the liquid distributing hole of the second liquid distributor
Aperture is generally 5-9mm, preferably 6-8mm.
The liquid distributing hole eyelet of the first liquid distributor bottom or the second liquid distributor bottom that are located above should be avoided as far as possible below
The second liquid distributor or the first liquid distributor, i.e. liquid distributor below eyelet not positive alignment, in order to avoid block the liquid sprayed downwards.
The flowmeter is located on main pipeline, can will test signal and pass to flow control interlock system, realize to first
The control action of control valve, the second control valve.
Further, the gas phase free cross-sectional area Zhan Quanta of the liquid distribution trough or 40%- of reactor cross section product
90%, to reduce pressure drop and entrainment, occupy-place height is 100-500mm.
According to another aspect of the present invention, the present invention provides a kind of liquid point of high operating flexibility using above-mentioned apparatus
Cloth method, this method comprises:
1) flow in main pipeline is detected by flowmeter, when produce load is lower, if flow is lower than setting lower limit at this time
Value L, i.e., sprinkle density is less than 3~9m3/(m2H), preferably smaller than 4~8m3/(m2H), more preferably less than 5~7m3/(m2·
H), then the first control valve is opened, and the second control valve is closed, and liquid flows into the first liquid by the first feed pipe by the first control valve
Body distribution pipe enters the first liquid distributor by the distribution of the first liquid dispensing tube, and final liquid is equal by the first liquid distributor bottom side liquid distributing hole
It is even to be distributed in reactor or inner-tower filling material layer surface, form liquid initial distribution；
2) when produce load gradually increases, by flow in flowmeter detection main pipeline, if flow is higher than under setting at this time
Limit value L and lower than setting upper limit value H, i.e., sprinkle density is less than 12~26m3/(m2H), preferably smaller than 15~24m3/(m2·
H), more preferably less than 18~22m3/(m2H), then the second control valve is opened, and the first control valve is closed, and liquid passes through the second control
Valve flows into second liquid distribution pipe by the second feed pipe, enters the second liquid distributor, final liquid by the distribution of second liquid distribution pipe
Body is evenly distributed in reactor by the second liquid distributor bottom side liquid distributing hole or inner-tower filling material layer surface, forms liquid initial distribution；
3) when produce load continues growing, by flow in flowmeter detection main pipeline, if flow is higher than the setting upper limit at this time
Value H, then the first control valve is opened, and the second control valve is opened, and liquid passes through first by the first control valve, the second control valve respectively
Feed pipe, the second feed pipe flow into the first liquid dispensing tube, second liquid distribution pipe, by the first liquid dispensing tube, second liquid
Distribution pipe distribution enters the first liquid distributor, the second liquid distributor, and final liquid is by the first liquid distributor, the second liquid distributor bottom side liquid distributing hole
It is evenly distributed in reactor or inner-tower filling material layer surface, formation liquid initial is distributed.
In the present invention, operating flexibility refers to that the minimum allowable value (load lower limit) of sprinkle density arrives maximum permissible value (load
The upper limit) between range, when sprinkle density changes within this range, liquid distribution trough is able to carry out the liquid distribution of high quality,
In the case where rectifying column, guarantee that rectifying column can maintain normal operating under higher separating effect.High operation bullet of the present invention
The property accessible liquid of liquid distribution device includes but is not limited to need to carry out equally distributed common chemical liquid, mainly includes
Water, organic acid, alcohol, ester, ether, amine and liquid hydrocarbon etc., such as water, acetic acid, ethylene glycol, ethyl acetate, dimethyl ether, benzene etc..
In the present invention, load height can judge according to sprinkle density, and sprinkle density=flow/tower section product works as tower
After diameter determines, can only it be judged by flow.
Beneficial effects of the present invention: by rationally designing liquid distribution trough size, and utilizing liquid distribution control system, can
So that liquid distribution trough operating flexibility is reached 1:13, can solve rectifying load variations it is big when, cannot achieve entirely with a distributor
The difficult point of uniform and stable distribution in load, while the liquid distribution trough in the present invention also has air resistance low, it is horizontal to installation
Degree requires relatively low, and distributed mass is small by liquid fluctuating, and footprint is small, and structure is simple, the advantages such as at low cost.
Detailed description of the invention
Fig. 1 is the control system schematic diagram of high operating flexibility liquid distribution device of the invention.
Fig. 2 is the structural schematic diagram of high operating flexibility liquid distribution device of the invention.
Fig. 3 is the structural schematic diagram of liquid distributor.
Fig. 4 is the main view of high operating flexibility liquid distribution device of the invention.
Fig. 5 is the side view of high operating flexibility liquid distribution device of the invention.
Fig. 6 is the top view of high operating flexibility liquid distribution device of the invention.
Fig. 7 is the schematic diagram of the liquid distributing hole square arrangement of high operating flexibility liquid distribution device of the invention.
Fig. 8 is the schematic diagram of the liquid distributing hole rounded projections arranged of high operating flexibility liquid distribution device of the invention.
Appended drawing reference:
1. liquid distribution trough；2. the first control valve；3. the second control valve；4. flowmeter；5. flow control interlock system, 6.
Main pipeline；
101. the first feed pipe；102. the second feed pipe；103. the first liquid dispensing tube；104. second liquid distribution pipe；
105. the first liquid distributor；106. the second liquid distributor；107. liquid distributing hole.
Specific embodiment
In order to more clearly explain technical problem, technical solution and beneficial effect to be solved, by real in detail below
The mode of applying describes in detail.Following embodiment is only used to illustrate the technical scheme of the present invention rather than its limitations, it is all without departing from
Any modification of spirit and scope of the invention or equivalent replacement, shall fall within the scope of the technical solution of the present invention.
For sake of convenience, hereinafter so-called " preceding " " rear " " left side " " right side " "upper" "lower" and attached drawing itself it is forward and backward, left,
The right side, upper and lower direction are consistent, but do not play restriction effect to structure of the invention.
Unless otherwise defined, the technical term or scientific term used herein should be in fields of the present invention and has
The ordinary meaning that the personage of general technical ability is understood." one used in present patent application specification and claims
It is a " or the similar word such as " one " do not indicate that quantity limits yet, but indicate that there are at least one.
In order to be described further to this patent, specific embodiments of the present invention are given.
For maximum operating flexibility of the invention up to 1:13, stable operation in full load can provide the liquid of high quality for rectifying column
Body initial distribution.
Embodiment passes through the degree M that is evenly distributedf, distributed mass DQ, gas passage accounts for tower section product, operating flexibility is evaluated
The superiority and inferiority of liquid distribution trough, the degree that is evenly distributed MfIt is smaller, it is distributed more uniform, distributed mass DQBigger, distributed effect is better, gas
Body channel account for tower section product it is bigger, pressure drop is smaller, and entrainment is smaller.
As shown in figures 1 to 6, a kind of device for realizing high operating flexibility liquid distribution of the invention comprising liquid distribution trough
1 and liquid distribution control system, liquid distribution trough is arranged in tower (such as stuffing rectification column) or reactor, especially upper space
It is interior；The liquid distribution trough includes the first feed pipe 101 for material to be input to liquid distribution trough, with the first feed pipe
First liquid dispensing tube 103 of end connection connect with the first liquid dispensing tube and is distributed in the first liquid dispensing tube longitudinal two
Two column (for example, 2 × 4 or 2 × 6 or 2 × 8 or 2 × 10 or 2 × 12) first liquid distributors 105 of side, being used for will
Material is input to the second feed pipe 102 of liquid distribution trough, is located at the first liquid dispensing tube below or above, divides with the first liquid
Second liquid distribution pipe 104 (preferably the first liquid dispensing tube and the second liquid point that piping intersects and connect with the second feed pipe
It is piped square crossing, preferably in respectively midpoint intersection or the square crossing of the first liquid dispensing tube and second liquid distribution pipe), with
Second liquid distribution pipe connect and be distributed in second liquid distribution pipe longitudinal direction two sides two column (for example, 2 × 4 or 2 × 6 or
2 × 8 or 2 × 10 or 2 × 12) the second liquid distributor 106, the second liquid distributor 106 is integrally located under the first liquid distributor 104
Multiple liquid distributing holes are distributed with (preferably in the bottom side of each of side or top, two the first liquid distributors of column and two the second liquid distributors of column
It is furnished with equidistant liquid distributing hole) 107, the internal diameter of second liquid distribution pipe is greater than internal diameter (such as the big 5- of the first liquid dispensing tube
20mm), the internal diameter of the second liquid distributor is greater than the internal diameter (such as big 5-20mm) of the first liquid distributor；The liquid distribution control system
It is used to control the first control valve of the first feed pipe flow outside tower including being set to the first feed pipe or on reactor outer portion
2, be set to the second feed pipe tower is outer or reactor outer portion on for control the second feed pipe flow the second control valve 3,
It is set to flowmeter 4 on the main pipeline 6 that the first feed pipe merges with the second feed pipe, is adjusted or is controlled according to flowmeter measurements
Make the flow control interlock system 5 of the first and second control valve.The flow control interlock system 5 and flowmeter 4 and the first, second control
Valve 2,3 processed communicates to connect.
The junction of first feed pipe 101 and the first liquid dispensing tube 103 be located at the first liquid dispensing tube 103 substantially in
Point, the second feed pipe 102, which is divided to, is connected to the second liquid distribution pipe positioned at the first liquid dispensing tube two sides for two branch pipes
On 104.Generally, the first feed pipe 101 turns back be connected to downward vertically in the top at the midpoint of the first liquid dispensing tube 103
The midpoint of one liquid dispensing tube 103, the second feed pipe 102 is above the midpoint of second liquid distribution pipe 104 (right above preferably)
It branches into two branch pipes to migrate to two sides, in the two sides at second liquid distribution pipe midpoint, (position at the two lateral extents midpoint is about
It is the 1/6~3/5 of second liquid distribution pipe end-point distances midpoint, such as 1/4) is connected to second liquid distribution downward vertically
Pipe 104.
In one embodiment, 101 internal diameter of the first feed pipe is 20-60mm, preferably 25~50mm；Second feed pipe
102 internal diameters are 35-75mm, preferably 40~65mm, and the internal diameter for two branch pipes that usual second feed pipe separates is 25~50mm.Pipe
Wall thickness is the pipe thickness commonly used in this field, and material can be metal tube such as copper pipe or steel pipe.
First liquid dispensing tube 103 with second liquid distribution pipe 104 is orthogonal divides equally, the first and second liquid dispensing tube
103, it 104 is determined with the length of the first and second liquid distributor 105,106 by tower diameter, normally, from close to the first liquid dispensing tube midpoint
With second liquid distribution pipe midpoint to the direction of the first liquid dispensing tube and the both ends of second liquid distribution pipe, two column the first cloth liquid
The length of pipe 105 and the second liquid distributor 106 is gradually reduced (so that the exterior contour of two the first liquid distributors of column and the second liquid distributor is in
Existing circle), to adapt to the tower or reactor of circular cross-section.What the exterior contour of two the first liquid distributors of column and the second liquid distributor was formed
The difference of round diameter and tower internal diameter or reactor inside diameter is 1-3 times of liquid distributing hole spacing.
First liquid dispensing tube 103,104 both ends of second liquid distribution pipe are equipped with closure ring flange and (do not show in figure
Out), multiple diameter 2-10mm are opened up on the two bottom centerline, the preferably drain hole of 3-8mm, spacing is generally 50-120mm,
It is preferred that 60-110mm, more preferable 70-100mm, the first liquid dispensing tube 103,104 two sides of second liquid distribution pipe (preferably two
Middle side part) two column the first liquid distributors 105, the second liquid distributor 106 are connected or are connected to, preferably all first liquid distributors are located at same flat
Face and all second liquid distributors are generally aligned in the same plane.
First liquid dispensing tube internal diameter is generally 20-60mm, preferably 25-50mm, and second liquid distribution bore is generally
35-75mm, preferably 40-65mm, the first liquid distributor caliber are that the liquid distributor caliber of 10-20mm, for example, about 15mm, second is 15-
30mm, preferably 20-25mm, the first, second liquid dispensing tube caliber are preferably the 1.2-4 of the first, second liquid distributor caliber respectively
Times.
First liquid distributor 105,106 bottom of the second liquid distributor are provided with equidistant liquid distributing hole 107, such as guaranteeing
Liquid is evenly distributed on packing layer, and liquid distributing hole aperture is generally 2-10mm, preferably 3-8mm.
Preferably, the liquid distributing hole spacing on the first liquid distributor 105 and the second liquid distributor 106 can be 50-120mm, preferably
60-110mm, more preferable 70-100mm, liquid distributing hole density can be 50-300/m2。
Preferably, the liquid distributing hole aperture of the second liquid distributor is greater than the aperture of the liquid distributing hole of the first liquid distributor, such as big 1-
4mm, preferably 2-3mm.The liquid distributing hole aperture of first liquid distributor is generally 2-5mm, preferably 3-4mm, the liquid distributing hole of the second liquid distributor
Aperture is generally 5-9mm, preferably 6-8mm.
The liquid distributing hole eyelet of the first liquid distributor bottom or the second liquid distributor bottom that are located above should be avoided as far as possible below
The second liquid distributor or the first liquid distributor, i.e. liquid distributor below eyelet not positive alignment, in order to avoid block the liquid sprayed downwards.
The flowmeter is located on main pipeline, can will test signal and pass to flow control interlock system, realize to first
The control action of control valve, the second control valve.
The gas phase free cross-sectional area of the liquid distribution trough accounts for full tower section product 40%-90%, to reduce pressure drop and mist
Foam entrainment, occupy-place height are 100-500mm.
Included the following steps: using the high operating flexibility liquid distribution method of above-mentioned apparatus
1) flow in main pipeline is detected by flowmeter, when produce load is lower, if flow is lower than setting lower limit at this time
Value L, i.e., sprinkle density is less than 3~9m3/(m2H), preferably smaller than 4~8m3/(m2H), more preferably less than 5~7m3/(m2·
H), then the first control valve is opened, and the second control valve is closed, and liquid flows into the first liquid by the first feed pipe by the first control valve
Body distribution pipe enters the first liquid distributor by the distribution of the first liquid dispensing tube, and final liquid is equal by the first liquid distributor bottom side liquid distributing hole
It is even to be distributed in reactor or inner-tower filling material layer surface, form liquid initial distribution；
2) when produce load gradually increases, by flow in flowmeter detection main pipeline, if flow is higher than under setting at this time
Limit value L, lower than setting upper limit value H, i.e., sprinkle density is less than 12~26m3/(m2H), preferably smaller than 15~24m3/(m2H),
More preferably less than 18~22m3/(m2H), then the second control valve is opened, and the first control valve is closed, and liquid passes through the second control valve
Second liquid distribution pipe is flowed by the second feed pipe, the second liquid distributor, final liquid are entered by the distribution of second liquid distribution pipe
It is evenly distributed in reactor by the second liquid distributor bottom side liquid distributing hole or inner-tower filling material layer surface, formation liquid initial is distributed；
3) when produce load continues growing, by flow in flowmeter detection main pipeline, if flow is higher than the setting upper limit at this time
Value H, then the first control valve is opened, and the second control valve is opened, and liquid is by the first control valve, the second control valve by the first charging
Pipe, the second feed pipe flow into the first liquid dispensing tube, second liquid distribution pipe, are distributed by the first liquid dispensing tube, second liquid
Pipe distribution enters the first liquid distributor, the second liquid distributor, and final liquid is uniform by the first liquid distributor, the second liquid distributor bottom side liquid distributing hole
It is distributed in reactor or inner-tower filling material layer surface, formation liquid initial is distributed.
Embodiment 1
Structure is as shown in Figure 1, 2.Tower diameter 700mm, maximum regurgitant volume 10m3/ h, minimum reflux amount 0.77m3/ h, the first charging
Bore is 25mm, and the second charging bore is 50mm, and the internal diameter for two branch pipes that the second feed pipe separates is 32mm, first
Liquid dispensing tube internal diameter 25mm, the first liquid distributor internal diameter 15mm, the first liquid distributor number 2 × 8 are symmetrically arranged, liquid distributing hole diameter
5mm, liquid distributing hole spacing 82mm, by square arrangement and from tower wall distance 50mm not cloth hole, the first liquid dispensing tube bottom center line
On open 6 holes, diameter 5mm, spacing 82mm open 52 holes on the first liquid distributor bottom center line, in total 58 liquid distributing holes, liquid distributing hole
150/m of density2.Second liquid distributes bore 50mm, the second liquid distributor internal diameter 20mm, and the second liquid distributor number 2 × 8 is right
Claim arrangement, liquid distributing hole diameter 8mm, liquid distributing hole spacing 82mm, by square arrangement and from tower wall distance 50mm not cloth hole, the second liquid
Opening 6 holes on the center line of body distribution pipe bottom, diameter 8mm, spacing 82mm open 52 holes on the center line of liquid distributor bottom, and 58 in total
Liquid distributing hole, 150/m of liquid distributing hole density2, occupy-place height 200mm.From close to the first liquid dispensing tube midpoint and second liquid point
Midpoint is piped to the direction of the first liquid dispensing tube and the both ends of second liquid distribution pipe, two the first liquid distributors of column and the second cloth liquid
The length of pipe is gradually reduced, so that round, the round diameter is presented in the exterior contour of two the first liquid distributors of column and the second liquid distributor
For 600mm.
High operating flexibility liquid distribution is realized using following steps: flow in pipeline being detected by flowmeter 4 first, works as production
When load is lower, if flow is lower than preset lower limit 2.3m at this time3/ h, then the first control valve 2 is opened, and the second control valve 3 is closed,
Liquid flows into the first liquid dispensing tube 103 by the first feed pipe 101 by the first control valve 2, by the first liquid dispensing tube 103
Distribution enters the first liquid distributor 105, and final liquid is evenly distributed on by liquid distributing hole 107 on 105 center of underside line of the first liquid distributor
Inner-tower filling material layer surface forms liquid initial distribution.
When produce load gradually increases, by flow in the detection pipeline of flowmeter 4, if flow is higher than preset lower limit at this time
2.3m3/ h, lower than setting upper limit value 7.7m3/ h, then the second control valve 3 is opened, and the first control valve 2 is closed, and liquid passes through the second control
Valve 3 processed flows into second liquid distribution pipe 104 by the second feed pipe 102, enters the second cloth by the distribution of second liquid distribution pipe 104
Liquid pipe 106, final liquid are evenly distributed on inner-tower filling material layer surface by liquid distributing hole 107 on 106 center of underside line of the second liquid distributor,
Form liquid initial distribution.
When produce load continues growing, by flow in the detection pipeline of flowmeter 4, if flow is higher than setting upper limit value at this time
7.7m3/ h, then the first control valve 2, the second control valve 3 are switched on, and liquid is by the first control valve 2, the second control valve 3 by the
One feed pipe 101, the second feed pipe 102 flow into the first liquid dispensing tube 103, second liquid distribution pipe 104, by the first liquid point
Piping 103, the distribution of second liquid distribution pipe 104 enter the first liquid distributor 105, the second liquid distributor 106, and final liquid is by the first cloth
Liquid distributing hole 107 is evenly distributed on inner-tower filling material layer surface in liquid pipe 105,106 center of underside line of the second liquid distributor, at the beginning of forming liquid
Begin to be distributed.
Embodiment 2
Tower diameter 1000mm, maximum regurgitant volume 20.4m3/ h, minimum reflux amount 1.57m3/ h, the first charging bore is 50mm,
Second charging bore is 65mm, and the internal diameter for two branch pipes that the second feed pipe separates is 45mm, in the first liquid dispensing tube
Diameter 50mm, the first liquid distributor internal diameter 15mm, the first liquid distributor number 2 × 12 is symmetrically arranged, liquid distributing hole diameter 4mm, between liquid distributing hole
Away from 72mm, 12 holes are opened by rounded projections arranged and in tower wall distance 72mm not cloth hole, the first liquid dispensing tube bottom center line, directly
Diameter 4mm, spacing 72mm open 136 holes on the first liquid distributor bottom center line, in total 148 liquid distributing holes, and liquid distributing hole density 189/
m2.Second liquid distributes bore 65mm, the second liquid distributor internal diameter 25mm, and the second liquid distributor number 2 × 12 is symmetrically arranged, cloth
Fluid apertures diameter 7mm, liquid distributing hole spacing 72mm, by rounded projections arranged and from tower wall distance 72mm not cloth hole, second liquid distribution pipe
Open 12 holes on the center line of bottom, diameter 7mm, spacing 72mm open 136 holes on the second liquid distributor bottom center line, in total 148 cloth
Fluid apertures, 189/m of liquid distributing hole density2, occupy-place height 250mm.It is distributed from close to the first liquid dispensing tube midpoint and second liquid
Pipe midpoint is to the direction of the first liquid dispensing tube and the both ends of second liquid distribution pipe, two the first liquid distributors of column and the second liquid distributor
Length be gradually reduced so that the exterior contour of two the first liquid distributors of column and the second liquid distributor presents round, which is
856mm。
Operating method is same as Example 1.
Embodiment 3
Tower diameter 1200mm, maximum regurgitant volume 17m3/ h, minimum reflux amount 1.3m3/ h, the first charging bore is 32mm, the
Two charging bores are 65mm, and the internal diameter for two branch pipes that the second feed pipe separates is 45mm, the first liquid dispensing tube internal diameter
32mm, the first liquid distributor internal diameter 15mm, the first liquid distributor number 2 × 10 are symmetrically arranged, liquid distributing hole diameter 5mm, liquid distributing hole spacing
100mm opens 5 holes by square arrangement and in tower wall distance 100mm not cloth hole, the first liquid dispensing tube bottom center line, directly
Diameter 5mm, spacing 100mm open 108 holes on the first liquid distributor bottom center line, in total 113 liquid distributing holes, liquid distributing hole density 100
A/m2.Second liquid distributes bore 65mm, the second liquid distributor internal diameter 20mm, and the second liquid distributor number 2 × 10 is symmetrically arranged,
Liquid distributing hole diameter 8mm, liquid distributing hole spacing 100mm, by square arrangement and from tower wall distance 100mm, cloth hole, second liquid do not divide
With opening 5 holes on tube bottom center line, diameter 8mm, spacing 100mm open 108 holes on the second liquid distributor bottom center line, and in total 113
A liquid distributing hole, 100/m of liquid distributing hole density2, occupy-place height 200mm.From close to the first liquid dispensing tube midpoint and second liquid
Distribution pipe midpoint is to the direction of the first liquid dispensing tube and the both ends of second liquid distribution pipe, two the first liquid distributors of column and the second cloth
The length of liquid pipe is gradually reduced, so that circle is presented in the exterior contour of two the first liquid distributors of column and the second liquid distributor, the circle is straight
Diameter is 100mm.
Operating method is same as Example 1.
As it can be seen from table 1 embodiment 1,2,3, available preferable by rationally designing to liquid distribution trough
Distributed mass, be the liquid distribution trough of a function admirable, and the degree that is evenly distributed is preferable, it is logical to possess enough gas
Road can reduce pressure drop and entrainment, and liquid distribution trough has very big operating flexibility, can reach 1:13.
Comparative example 1
Tower diameter 700mm, maximum regurgitant volume 2.3m3/ h, minimum reflux amount 0.77m3/ h, liquid dispensing tube internal diameter 25mm, cloth liquid
Bore 15mm, is symmetrically arranged, liquid distributing hole diameter 5mm, liquid distributing hole spacing 82mm, by square arrangement by liquid distributor number 2 × 8
And 6 holes, diameter 5mm, spacing 82mm, liquid distributor bottom are opened in tower wall distance 50mm not cloth hole, liquid dispensing tube bottom center line
52 holes are opened on center line, in total 58 liquid distributing holes, 150/m of liquid distributing hole density2, occupy-place height 100mm.
1 embodiment liquid distribution trough quality evaluation of table
| Operating condition | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 |
| Maximum Mf | 0.0993 | 0.0564 | 0.0993 | 0.113 |
| Distributed mass DQ | 82.2% | 83.5% | 81.5% | 79.8% |
| Gas passage accounts for tower section product | 69.6% | 66.7% | 68.5% | 82.5% |
| Operating flexibility | 1:12.9 | 1:13 | 1:13.1 | 1:3 |
Claims (10)
1. a kind of high operating flexibility liquid distribution device comprising liquid distribution trough and liquid distribution control system, liquid distribution
Device is arranged in tower or reactor, and the liquid distribution trough includes the first charging for material to be input to liquid distribution trough
Pipe, the first liquid dispensing tube connecting with the end of the first feed pipe connect with the first liquid dispensing tube and are distributed in the first liquid
Two the first liquid distributors of column of body distribution pipe longitudinal direction two sides are located at for material to be input to the second feed pipe of liquid distribution trough
First liquid dispensing tube below or above, the second liquid for intersecting with the first liquid dispensing tube and being connect with the second feed pipe distribution
Pipe, connect with second liquid distribution pipe and is distributed in two the second liquid distributors of column of second liquid distribution pipe longitudinal direction two sides, the second cloth
Liquid pipe is integrally located at the below or above of the first liquid distributor, the bottom of each of two the first liquid distributors of column and two the second liquid distributors of column
Side is distributed with multiple liquid distributing holes, and the internal diameter of second liquid distribution pipe is greater than the internal diameter of the first liquid dispensing tube (such as big 5-
20mm), the internal diameter of the second liquid distributor is greater than the internal diameter (such as big 5-20mm) of the first liquid distributor；The liquid distribution control system
It is used to control the first control valve of the first feed pipe flow outside tower including being set to the first feed pipe or on reactor outer portion,
It is set to outside the tower of the second feed pipe or on reactor outer portion for controlling the second control valve of the second feed pipe flow, setting
Flowmeter on the main pipeline that the first feed pipe merges with the second feed pipe adjusts according to flowmeter measurements or controls the
One, the flow control interlock system of two control valves.
2. high operating flexibility liquid distribution device according to claim 1, which is characterized in that the first feed pipe and the first liquid
The junction of body distribution pipe is located at the midpoint of the first liquid dispensing tube, and the second feed pipe, which is divided into two branch pipes and is connected to, to be located at
In the second liquid distribution pipe of first liquid dispensing tube two sides.
3. high operating flexibility liquid distribution device according to claim 1 or 2, which is characterized in that the first charging bore
For 20-60mm, preferably 25~50mm；Second charging bore be 35-75mm, preferably 40~65mm,
It is divided into two branch pipes in the second feed pipe and is connected to the second liquid distribution pipe positioned at the first liquid dispensing tube two sides
In the case where upper, the internal diameter for two branch pipes that the second feed pipe separates is 25~50mm.
4. high operating flexibility liquid distribution device according to any one of claim 1-3, which is characterized in that the first liquid
Distribution pipe with second liquid distribution pipe is orthogonal divides equally, the length of the first and second liquid dispensing tube and the first and second liquid distributor is by tower
Diameter or reactor inside diameter decision,
Preferably, from close to the first liquid dispensing tube midpoint and second liquid distribution pipe midpoint to the first liquid dispensing tube and second
The length of the direction at the both ends of liquid dispensing tube, two the first liquid distributors of column and the second liquid distributor is gradually reduced, so that two column first
Circle is presented in the exterior contour of liquid distributor and the second liquid distributor, to adapt to the tower or reactor of circular cross-section；
Preferably, round diameter and tower internal diameter or reactor that the exterior contour of two the first liquid distributors of column and the second liquid distributor is formed
The difference of internal diameter is 1-3 times of liquid distributing hole spacing, wherein the liquid distributing hole spacing on the first liquid distributor and the second liquid distributor is 50-
120mm。
5. high operating flexibility liquid distribution device described in any one of -4 according to claim 1, which is characterized in that described first
Liquid dispensing tube, second liquid distribution pipe both ends are equipped with closure ring flange, the first liquid dispensing tube, second liquid distribution pipe two
Multiple diameter 2-10mm, the preferably drain hole of 3-8mm, spacing 50-120mm, preferably 60- are opened up on person's bottom centerline
110mm, more preferable 70-100mm, the first liquid dispensing tube, second liquid distribution pipe two sides be separately connected two the first liquid distributors of column,
Second liquid distributor, preferably all first liquid distributors are generally aligned in the same plane and all second liquid distributors are generally aligned in the same plane；
Preferably, the first liquid dispensing tube internal diameter is generally 20-60mm, preferably 25-50mm, and it is general that second liquid distributes bore
For 35-75mm, preferably 40-65mm, the first liquid distributor liquid distributor caliber of internal diameter 10-20mm, for example, about 15mm, second is 15-
30mm, preferably 20-25mm, the first, second liquid dispensing tube caliber are preferably the 1.2-4 of the first, second liquid distributor caliber respectively
Times.
6. high operating flexibility liquid distribution device according to any one of claims 1-5, which is characterized in that the first cloth liquid
Liquid distributing hole spacing on pipe and the second liquid distributor is 50-120mm, preferably 60-110mm, more preferable 70-100mm.
7. high operating flexibility liquid distribution device according to any one of claims 1-5, which is characterized in that the second cloth liquid
The liquid distributing hole aperture of pipe is greater than the aperture of the liquid distributing hole of the first liquid distributor, such as big 1-4mm, preferably 2-3mm；
Preferably, the liquid distributing hole aperture of the first liquid distributor is generally 2-5mm, preferably 3-4mm, the liquid distributing hole aperture of the second liquid distributor
Generally 5-9mm, preferably 6-8mm.
8. high operating flexibility liquid distribution device according to any one of claims 1-5, which is characterized in that the flow
Meter is located on main pipeline, can will test signal and pass to flow control interlock system, realize to the first control valve, the second control valve
Control action.
9. high operating flexibility liquid distribution device according to any one of claims 1-5, which is characterized in that the liquid
The gas phase free cross-sectional area of distributor accounts for full tower section product 40%-90%, and occupy-place height is 100-500mm.
10. a kind of be distributed high operation bullet using the high operating flexibility liquid distribution device of any of claims 1-9
The method of property liquid, this method comprises:
1) flow in main pipeline is detected by flowmeter, when produce load is lower, if flow is lower than preset lower limit L at this time,
Then the first control valve is opened, and the second control valve is closed, and liquid flows into the first liquid by the first feed pipe by the first control valve
Distribution pipe enters the first liquid distributor by the distribution of the first liquid dispensing tube, and final liquid is uniform by the first liquid distributor bottom side liquid distributing hole
It is distributed in reactor or inner-tower filling material layer surface, formation liquid initial is distributed；
2) when produce load gradually increases, by flow in flowmeter detection main pipeline, if flow is higher than preset lower limit L at this time,
Lower than setting upper limit value H, then the second control valve open, the first control valve close, liquid by the second control valve by second into
Expects pipe flows into second liquid distribution pipe, enters the second liquid distributor by the distribution of second liquid distribution pipe, final liquid is by the second cloth liquid
Tube bottom side liquid distributing hole is evenly distributed in reactor or inner-tower filling material layer surface, forms liquid initial distribution；
3) when produce load continues growing, by flow in flowmeter detection main pipeline, if flow is higher than setting upper limit value H at this time,
Then the first control valve is opened, and the second control valve is opened, liquid passes through the first control valve, the second control valve passes through the first feed pipe,
Second feed pipe flows into the first liquid dispensing tube, second liquid distribution pipe, by the first liquid dispensing tube, second liquid distribution pipe point
Cloth enters the first liquid distributor, the second liquid distributor, and final liquid is uniformly distributed by the first liquid distributor, the second liquid distributor bottom side liquid distributing hole
In reactor or inner-tower filling material layer surface, formation liquid initial are distributed.
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| CN201910635882.1A CN110251982B (en) | 2019-07-15 | 2019-07-15 | High-operation-elasticity liquid distribution device and method |
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Cited By (1)
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| CN111068355A (en) * | 2020-01-17 | 2020-04-28 | 浙江工业大学 | Safety interlocking flow simulation system based on ethanol rectifying tower |
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Denomination of invention: A liquid distribution device and method with high operating flexibility Effective date of registration: 20211123 Granted publication date: 20210723 Pledgee: Bank of China Limited by Share Ltd. Yantai branch Pledgor: Wanhua Chemical Group Co.,Ltd. Registration number: Y2021980013026 |
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