CN102949859B - Catalytic distillation equipment provided with liquid distributor - Google Patents
Catalytic distillation equipment provided with liquid distributor Download PDFInfo
- Publication number
- CN102949859B CN102949859B CN201110252059.6A CN201110252059A CN102949859B CN 102949859 B CN102949859 B CN 102949859B CN 201110252059 A CN201110252059 A CN 201110252059A CN 102949859 B CN102949859 B CN 102949859B
- Authority
- CN
- China
- Prior art keywords
- liquid distribution
- distribution trough
- beds
- screen casing
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to catalytic distillation equipment provided with a liquid distributor, belonging to the field of chemical devices. A liquid distributor is arranged at the upper part of each catalyst bed layer of a middle reaction section, air riser pipes are arranged at two sides, each air riser pipe is of a space formed by the wall of the catalyst bed layer and a tower body, and the tops of the air riser pipes are higher than the liquid distributors; each liquid distributor comprises a disc surface, and sieve meshes and sieve pipes evenly distributed on the disc surface triangularly, and two adjacent triangles enable the sieve meshes and sieve pipes to be alternated; a bottom support is arranged at the bottom of each catalyst bed layer; and a catalyst is bulkily filled in spaces defined by the liquid distributors, the bottom supports and the catalyst bed layer walls. According to the catalytic distillation equipment provided with the liquid distributor, liquid-phase materials are evenly distributed on the catalyst bed layers, and the utilization efficiency of the catalyst can be improved.
Description
Technical field
The present invention relates to a kind of catalysis-distillation equipment that liquid distribution trough is set, is the novel device of the catalytic distillation technology of petrochemical industry, belongs to chemical plant installations field.
Background technology
Catalysis-distillation equipment is different from product boiling point based on heat-producing chemical reaction process and reactant, by catalytic reaction and the device that separates two PROCESS COUPLING and carry out in same equipment, when carrying out, reaction make reactant separate with product, to break the balance of reaction, reaction is carried out completely, and then reached higher reaction conversion ratio.Because reaction liberated heat is for product separation, both simplified technological process, reach again the effect that reduces energy consumption.
Catalytic distillation tower generally comprises the rectifying section on top, the conversion zone at middle part, three parts of stripping section of bottom, the wherein structure of conversion zone, and the type of feed of catalyst in catalytic distillation tower is the key of catalytic distillation technology.Adopt the catalytic distillation tower of catalyst mode in bulk for reaction bed, can not be coupled with reacting two unit operations separating, cannot reach liquid in the equally distributed object of catalyst surface, easily form channeling and be unfavorable for abundant reaction.
United States Patent (USP) 4443559 packs catalyst granules in the tiny pocket made from glass fibre, cover and support with the stainless steel cloth that has certain opening space, then be rolled into there is one deck stainless steel cloth, the harness type cylinder catalytic distillation structure of tiny pocket that one deck is equipped with catalyst.This catalytic distillation structure can be used as resolution element, also can be used as reaction carriers, and therefore without liquid distribution trough is installed, but the catalytic distillation structure of bale packing pattern is made complex structure, and catalyst cost is high.
In existing Chinese patent, CN1042664 provides a kind of catalysis-distillation equipment, it is characterized in that conversion zone is divided into several beds, between two beds, establishes a plate.The top of beds is provided with catalyst block, and bottom is provided with catalyst gripper shoe, and is covered with silk screen in catalyst gripper shoe, the catalyst upper block at beds in bulk and being covered with between the gripper shoe of silk screen.Have advantages of that easy to loading and unloading, liquid phase reactor thing directly contacts with catalyst, but because beds top does not arrange liquid distribution trough, liquid phase material on tower tray is by directly passing through bed top silk screen inflow catalyst bed after seal pot, easily form channel, reduced catalyst utilization ratio.
Patent CN1281744 discloses a kind of fractionating reaction column plate type catalytic distillating equipment, is characterized in that conversion zone is made up of one or several fractionation reaction column plates, and each fractionation reaction column plate is divided into two regions, is above fractionation zone, and lower is reaction zone.There is liquid phase reacting material import on reaction zone top, and middle is the liquid phase reacting material of falling funnel-form conduit, and bottom is the beds expanding.Although the catalysis-distillation equipment that this patent provides provides the liquid phase reacting material of the falling funnel-form conduit of beds top, be beneficial to liquid phase material being uniformly distributed at beds, but because conduit inner side does not have ad hoc water conservancy diversion measure, only depending on down funnel to carry out water conservancy diversion, easily to form intermediate material on the high side, and bed both sides catalyst haptoreaction material phenomenon on the low side.
Summary of the invention
The invention provides a kind of catalysis-distillation equipment, this reacting section catalyst bed top, catalysis-distillation equipment middle part is provided with liquid distribution trough, makes beds structure be easy to liquid phase material and is uniformly distributed in beds inside, has improved catalyst service efficiency.
The catalysis-distillation equipment that liquid distribution trough is set of the present invention, comprises the rectifying section on top, the conversion zone at middle part and the stripping section of bottom, and its technical essential is:
(1) middle part conversion zone comprises at least two beds with air-lift tube, and every pair of adjacent catalyst bed interlayer at least arranges a plate;
(2) each beds top of conversion zone, middle part arranges liquid distribution trough, beds both sides are air-lift tube, air-lift tube is the space that beds wall and tower body form,, higher than liquid distribution trough, there is the liquid layer of certain altitude at the top of air-lift tube and prevents that liquid phase material from entering the weir in air-lift tube as maintaining on liquid distribution trough surface;
(3) liquid distribution trough is made up of card and uniform sieve aperture and the screen casing being arranged in card, and sieve aperture and screen casing are triangle at the arrangement mode of card and arrange, and two adjacent triangles are that sieve aperture is alternate with screen casing;
(4) beds bottom arranges bottom support, in the catalyst space forming at liquid distribution trough, bottom support and beds wall in bulk.
Described sieve aperture and screen casing at the arrangement mode of card are: the equilateral triangle being nested continuously from inside to outside centered by arbitrfary point, two adjacent equilateral triangles are that sieve aperture is alternate with screen casing.
Described sieve aperture and screen casing at the arrangement mode of card are: take arbitrfary point as the right angled triangle being nested successively from inside to outside on summit, right angled triangle right angle, two adjacent right angled triangles are that sieve aperture is alternate with screen casing.
The internal diameter of described sieve aperture is 1～8mm.
The internal diameter of described screen casing is 1～8mm.
Described screen casing height is 10～60mm.
When sieve aperture and screen casing are arranged, preferably, from the center of card, figure is nested successively from inside to outside, until a maximum equilateral or right angled triangle is while occurring, then continues to choose other point and arranges.Arragement direction equilateral or right angled triangle is any.
Described bottom support sets gradually the silk screen, porous sieve plate and the catalyst gripper shoe that are covered with inert filler from top to bottom, is routine setting.
Described beds liquid distribution trough top arranges downspout and liquid seal trough, and liquid seal trough, between downspout and liquid distribution trough, is those skilled in the art's routine setting.
Every two the catalyst bed interlayers of conversion zone arrange plate, and the loadings of tower tray number, bed number and each beds catalyst of rectifying section and stripping section is according to reaction conversion ratio and the requirement to product purity and output and fixed.The sieve aperture of liquid distribution trough and screen casing number need to be determined according to technique.For the variation of adaptive device load, screen casing height can be selected 1～3 kind of short tube different in size, and the screen casing of sieve aperture and differing heights is distributed on sieve plate surface.
Liquid phase material flows downward to last tower tray of rectifying section by tower top, through downspout and liquid seal trough, overflow is to the liquid distribution trough of beds top, liquid phase material is inflow catalyst bed after the sieve aperture on liquid distribution trough and screen casing water conservancy diversion, liquid can be uniformly distributed at beds, and reacts and emit reaction heat at this.The material flowing downward flows on next plate through after being covered with silk screen, porous sieve plate and the catalyst gripper shoe of inert filler, the gas phase of coming on this and next bed air-lift tube is carried out mass-and heat-transfer, gas phase on tower tray after gas-liquid exchange enters a upper tower tray through the air-lift tube of a upper bed, liquid phase on tower tray after gas-liquid exchange continues to flow downward, and flows into next bed continuation reaction.So alternately react continuously and fractional distillation process, until meet the requirements of reaction conversion ratio.
Be provided with at least one manhole or hand hole on the top of each beds, bottom is provided with catalyst and unloads outlet, for loading and unloading catalyst or overhaul of the equipments.Also can between each beds, establish one or several communicating pipe, catalyst is packed into from the loading port of the top bed, after use, unload outlet from of bottom bed and draw off.
In the catalysis-distillation equipment that liquid distribution trough is set of the present invention, all parts adopts and well known to a person skilled in the art raw material.
Beneficial effect of the present invention is as follows:
Compared with prior art, beneficial effect of the present invention is that beds top is provided with liquid distribution trough, makes liquid phase material be uniformly distributed in beds, has improved catalyst utilization ratio, and then has improved reaction conversion ratio.Equipment of the present invention can be used for reacting and the reacting of the etherification reaction of other tertiary olefins and alcohol, dehydration of alcohols generation ether, organic acid reacts with the direct esterification of alkene with esterification, the organic acid of alcohol, alkane or the alkylated reaction of aromatic hydrocarbons and other reversible balanced reaction containing the synthetic MTBE of the carbon four of isobutene and methyl alcohol effect.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the fragmentary top TV structure schematic diagram of liquid distribution trough of the present invention.
In figure: 1, rectifying section; 2, conversion zone; 3, stripping section; 4, tower body; 5, downspout; 6, liquid seal trough; 7, liquid distribution trough; 8, the first beds; 9, the first air-lift tube; 10, plate; 11, the second air-lift tube; 12, weir; 13, the second beds; 14, hand hole; 15, bottom support; 16, catalyst unloads outlet; 17, short screen casing; 18, long screen casing; 19, sieve aperture; 20, card.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in Figure 1 and Figure 2: the catalysis-distillation equipment that liquid distribution trough is set of the present invention, top is rectifying section 1, and bottom is stripping section 3, and middle part is conversion zone 2, and its technical essential is:
(1) conversion zone 2 arranges the first beds 8 and the second beds 13, between first beds 8 and the second beds 13, a plate 10 is set, the top of first beds 8 arranges downspout 5 and liquid seal trough 6, liquid seal trough 6 is between downspout 5 and the liquid distribution trough 7 of the first beds 8, and all the other beds arrange liquid seal trough and downspout too;
(2) conversion zone 2 each beds top, middle part arrange liquid distribution trough 7, both sides are air-lift tube, air-lift tube is the space that beds both sides and tower body 4 form,, higher than liquid distribution trough 7, there is the liquid layer of certain altitude at the top of air-lift tube and prevents that liquid phase material from entering the weir 12 in air-lift tube as maintaining on liquid distribution trough surface;
(3) liquid distribution trough is made up of card 20 and uniform sieve aperture 19 and the screen casing being arranged in card, the arrangement mode of sieve aperture 19 and screen casing is the equilateral triangle being nested continuously from inside to outside centered by arbitrfary point, and the kind of two adjacent equilateral triangles is that sieve aperture 19 is alternate with screen casing;
(4) beds bottom arranges bottom support, and in the catalyst space forming at liquid distribution trough, bottom support and air-lift tube wall in bulk, bottom support sets gradually the silk screen, porous sieve plate and the catalyst gripper shoe that are covered with inert filler from top to bottom.
In the present embodiment, select 370 sieve apertures 19,18 and 460 short screen casings 17 of 650 long screen casings, sieve aperture and length screen casing arrangement mode are the equilateral triangle being nested continuously from inside to outside centered by arbitrfary point, adopt equilateral triangle to be evenly distributed in liquid distribution trough card, its partial top view is shown in Fig. 2.The internal diameter of sieve aperture and length screen casing is 4mm, and long screen casing height is 40mm, and short screen casing height is 20mm.
Liquid phase material flows downward to last tower tray of rectifying section by tower top, through downspout 5 and liquid seal trough 6, the liquid distribution trough 7 of overflow to the first beds 8 tops, liquid phase material flows into the first beds 8 after the short screen casing 17 on liquid distribution trough 7, long screen casing 18 and sieve aperture 19 water conservancy diversion, and liquid phase material is uniformly distributed in beds, reacts and emit reaction heat at this.The liquid phase material flowing downward arrives on plate 10 after being covered with silk screen, porous sieve plate and the catalyst gripper shoe of inert filler, the gas phase of coming on the second air-lift tube 11 of this and the second beds 13 is carried out mass-and heat-transfer, gas phase on tower tray after gas-liquid exchange enters a upper tower tray through the first air-lift tube 9 of the first beds 8, liquid phase on plate 10 after gas-liquid exchange continues to flow downward, and flows into the second beds 13 continuation reactions.So alternately react continuously and fractional distillation process, until meet the requirements of reaction conversion ratio.
A hand hole 14 is set on the top of the first beds 8, and bottom is provided with catalyst and unloads outlet 16, for loading and unloading catalyst or overhaul of the equipments.Also can between each beds, establish one or several communicating pipe, catalyst is packed into from uppermost bed loading port, the outlet of unloading from nethermost bed after use draws off.
Equipment application test:
Certain mixes isobutene in C-4-fraction and reacts synthetic MTBE with methyl alcohol, and its reaction condition and product purity data are in table 1 (with Data Comparison in patent CN1042664).
Table 1 reaction condition and product purity tables of data
Beds of the present invention top is provided with liquid distribution trough, makes liquid phase material be uniformly distributed in beds, has improved catalyst utilization ratio, and then has improved reaction conversion ratio.
Claims (6)
1. one kind arranges the catalysis-distillation equipment of liquid distribution trough, comprise the rectifying section on top, the conversion zone at middle part and the stripping section of bottom, it is characterized in that: middle part conversion zone comprises at least two beds with air-lift tube, every pair of adjacent catalyst bed interlayer at least arranges a plate; Each beds top of conversion zone, middle part arranges liquid distribution trough, beds both sides are air-lift tube, air-lift tube is the space that beds wall and tower body form,, higher than liquid distribution trough, there is the liquid layer of certain altitude at the top of air-lift tube and prevents that liquid phase material from entering the weir in air-lift tube as maintaining on liquid distribution trough surface; Liquid distribution trough is made up of card and uniform sieve aperture and the screen casing being arranged in card, and sieve aperture and screen casing are triangle at the arrangement mode of card and arrange, and two adjacent triangles are that sieve aperture is alternate with screen casing; Beds bottom arranges bottom support, in the catalyst space forming at liquid distribution trough, bottom support and beds wall in bulk.
2. the catalysis-distillation equipment that liquid distribution trough is set according to claim 1, it is characterized in that described sieve aperture and screen casing at the arrangement mode of card are: the equilateral triangle being nested continuously from inside to outside, two adjacent equilateral triangles are that sieve aperture is alternate with screen casing centered by arbitrfary point.
3. the catalysis-distillation equipment that liquid distribution trough is set according to claim 1, it is characterized in that described sieve aperture and screen casing at the arrangement mode of card are: take arbitrfary point as the right angled triangle being nested successively from inside to outside on summit, right angled triangle right angle, two adjacent right angled triangles are that sieve aperture is alternate with screen casing.
4. the catalysis-distillation equipment that liquid distribution trough is set according to claim 1, is characterized in that the internal diameter of described sieve aperture is 1～8mm.
5. the catalysis-distillation equipment that liquid distribution trough is set according to claim 1, is characterized in that the internal diameter of described screen casing is 1～8mm.
6. the catalysis-distillation equipment that liquid distribution trough is set according to claim 1, is characterized in that described screen casing height is 10～60mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252059.6A CN102949859B (en) | 2011-08-30 | 2011-08-30 | Catalytic distillation equipment provided with liquid distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252059.6A CN102949859B (en) | 2011-08-30 | 2011-08-30 | Catalytic distillation equipment provided with liquid distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102949859A CN102949859A (en) | 2013-03-06 |
| CN102949859B true CN102949859B (en) | 2014-12-10 |
Family
ID=47759594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110252059.6A Active CN102949859B (en) | 2011-08-30 | 2011-08-30 | Catalytic distillation equipment provided with liquid distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102949859B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964006A (en) * | 2016-08-09 | 2016-09-28 | 山东成泰化工有限公司 | Catalyst distillation equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219950A (en) * | 2008-01-25 | 2008-07-16 | 天津大学 | System and method for producing n-butyl acetate by using methyl acetate and n-butyl alcohol ester exchange reaction |
-
2011
- 2011-08-30 CN CN201110252059.6A patent/CN102949859B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219950A (en) * | 2008-01-25 | 2008-07-16 | 天津大学 | System and method for producing n-butyl acetate by using methyl acetate and n-butyl alcohol ester exchange reaction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102949859A (en) | 2013-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101653710B (en) | Multistage multi-channel radial adiabatic reactor | |
| CN103657536B (en) | A kind of axial-radial combined type fixed bed catalytic reactor for butylene oxidation-dehydrogenation | |
| US5308592A (en) | Equipment for mixed phase reaction distillation | |
| CN100584420C (en) | Catalytic distillation tower reaction segment structrue | |
| CN101219950B (en) | System and method for producing n-butyl acetate by using methyl acetate and n-butyl alcohol ester exchange reaction | |
| CN105175211A (en) | Device and method for preparing high-purity isobutene through tert-butyl alcohol dehydration by means of catalytic distillation structured packing | |
| CN103752253B (en) | Catalytic rectification filler with radial distribution capability | |
| CN102397709A (en) | Modular catalyst filling structure of vertical sieve plate | |
| CN102516036B (en) | Process method for preparing methyl tert-butyl ether by differential reaction rectification and equipment for same | |
| CN105561617A (en) | Efficient catalysis rectification apparatus and applications thereof | |
| CN100404096C (en) | Reaction rectifying tower for producing dimethyl carbonate by using urea alcoholysis method | |
| CN108424358B (en) | Device and method for producing high-purity methylal by utilizing catalytic distillation coupling technology | |
| CN102949859B (en) | Catalytic distillation equipment provided with liquid distributor | |
| CN101219400A (en) | Catalyst net box and catalyst filling structure | |
| CN1345617A (en) | Catalytic reaction distillation equipment | |
| CN101306256B (en) | Catalyst distillation column internals for high effective mass transfer | |
| CN101480591A (en) | Tubular reaction fractionating tower | |
| CN206127165U (en) | Device of high -purity isobutene is prepared in tert -butyl alcohol dehydration | |
| CN202061400U (en) | Novel catalytic distillation equipment | |
| CN102166422B (en) | Novel catalytic distillation device | |
| CN1386560A (en) | Reactive distilling apparatus | |
| CN202893314U (en) | Catalyst filling structure of catalyst rectification tower | |
| CN211754821U (en) | Self-heating type fixed bed reactor and system | |
| CN105561615B (en) | catalytic distillation device and application | |
| CN202173791U (en) | Novel catalytic distillation equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |