CN201095645Y

CN201095645Y - Adsorption tower for dense moving bed

Info

Publication number: CN201095645Y
Application number: CNU2007200909895U
Authority: CN
Inventors: 冯峰; 于相浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-09
Filing date: 2007-07-09
Publication date: 2008-08-06
Anticipated expiration: 2017-07-09

Abstract

The utility model relates to an absorption tower of a compact moving bed, which comprises a main part tower body (2), a resin inlet pipe (1) is arranged on the top part of the tower body, a resin outlet port (8) is arranged on the bottom part, a liquid discharge tank (3) and a middle liquid discharge pipe (4) are arranged inside the upper part of the tower body, an overflow liquid groove (5) is arranged outside the tower body, a liquid feed pipe (6) and a liquid distribution device (7) are arranged inside the lower part. The utility model is characterized in that a resin-lifting pipe arranged on the top part of the tower is hemi-cycle shaped, a pipe outlet is arranged in the center of the tower and is vertically downward and directs towards the inside of the tower; the liquid discharge tank (3) is distributed around the perimeter of the tower wall, the liquid discharge port directs towards the overflow liquid groove (5) outside the tower; the outlet of liquid feed pipe (6) is vertically downward, just facing the liquid distribution device (7), the middle liquid discharge pipe (4) is contained inside the middle and upper part of the tower. The absorption tower has the advantages that the structure is simple, the production cost is low, the absorption rate is high and the production and the operation are stable, etc, and the absorption tower can be widely applied to the wet metallurgy industry, such as abstraction and reclamation of gallium metal and uranium.

Description

A kind of adsorption tower of packed moving bed

Technical field

The utility model is a kind of ion-exchange unit, belongs to the packed moving bed adsorption tower, can be widely used in the hydrometallurgy industry, for example: the extraction of gallium and uranium and recovery.

Technical background

Gallium is to be used to one of main raw material of producing semiconductor material, is to make the most basic functional materials of opto-electronic device, as gallium arsenide, gallium phosphide, gan etc.Gallium is a dissipated metal, because China's gallium resource is very abundant, the production potential of China's gallium is bigger in the world, domestic competition is the fierceness of ten minutes also, current, manufacturer both domestic and external has recognized that all having only with ion exchange method of technico-economical comparison advanced person reclaimed gallium from Bayer-process seed-separating mother liquor (hereinafter to be referred as the absorption mother liquor) in all multi-methods of producing gallium, therefore, each manufacturer all strengthens research and drops on the method for ion-exchange production gallium and on the equipment, constantly improve, to reach the purpose of low-cost high production.

The adsorption process of utilizing ion exchange method to reclaim gallium from the alumina producing flow process is difficult producing: the content 150-180mg/L of gallium in (1) seed precipitation solution, and concentration is lower, and resin need be saturated by a large amount of mother liquor ability; (2) viscosity big (viscosity is 3～4 lis of dregs of rice) of absorption mother liquor, mother liquor is bigger by the resistance of resin layer, and flow is lower, and resin is difficult for saturated; (3) absorption mother liquor floating material (aluminium hydroxide solid granule) height very easily stops up mother liquor pipeline and the device that passes in and out adsorption tower, and simultaneously a large amount of sestons remain in the resin layer, blocks the absorption mother liquor and passes through.(4) adsorption tower adopts the words that the following mode of advancing to go up fluid is adsorbed, if adsorption tail liquid has little time to discharge outside the tower, the continuous pop-up resin layer of absorption mother liquor meeting, cause head tower, cause the absorption can not steady running, accident occurs frequently, simultaneously the rise in order not allow resin layer not stop, have to reduce absorption flow, it is saturated to cause resin to be difficult for.Adsorb mother liquor (about 1.3g/L) proportion in addition greater than resin (1.08g/L) proportion, advance to go up the mode of fluid down, be easy to cause resin in tower, to float and move, upset the Gradient distribution of concentration in the tower, seriously reduced adsorption efficiency; (5) adsorption tower feed liquor mode adopts enterprising fluid down, and the aluminium hydroxide solid granule is easy to stifled tower, and absorption flow does not increase, and adsorption process can't normally be carried out; (6) owing to the potential impact of impurity vanadium absorption, the time of absorption can not be oversize.Therefore, select and design an adsorption device and just become very important problem on the gallium industrial production.

Though but ADSORPTION IN A FIXED BED tower efficient simple in structure is lower.This be because: (1) absorption mother liquor viscosity is big, and the resistance by resin the time is very big, is difficult to improve absorption flow, and resin is difficult for saturated; (2) easy accumulation aluminium hydroxide in the resin layer blocks the resin layer gap, causes the absorption mother liquid flow rate to descend, and makes the adsorption tower can't ordinary production, thereby influences gallium throughput; (3) adsorb the proportion of the proportion of mother liquor greater than resin, the resin eakiness in the ADSORPTION IN A FIXED BED tower, resin can be floating and mobile in tower, and the gradient of resin layer adsorption concentration is upset, and adsorption rate is reduced greatly; (4) because absorption flow is low, for saturated resin, have only the duration of contact that has increased absorption mother liquor and resin, reduced the separation factor of gallium and vanadium, increased the amount of impurity vanadium in the system, bring very big difficulty for the electrolysis of gallium.Therefore, using fixed bed is not best selection.

Summary of the invention

Technical problem to be solved in the utility model is: overcome the deficiency on the prior art, provide a kind of simple in structure, cost is lower, the absorption throughput is big, the adsorption efficiency height, and operation is simple, be difficult for stopping up easy-to-maintain ion-exchange packed moving bed an adsorption device.

The technical solution of the utility model is: adopt under the packed moving bed ion-exchange an adsorption device of fluid on the feed liquor, it comprises into pitch tube, main part tower body, liquid outlet tank, middle drain pipe, overflow liquid bath, liquid-inlet pipe, liquid distributor, puts the resin mouth.Carry pitch tube and be positioned at the tower head semicircular in shape, its mouth of pipe points in the tower head; Liquid outlet tank is uniform some around tower wall girth.Liquid outlet tank is subjected to the uniform 8-10mm circular hole of liquid part surface in tower, external parcel 20-60 eye mesh screen, and liquid outlet tank is made by the DN80-150 steel pipe in the tower outside part, to collect adsorption tail liquid; Middle drain pipe is formed by the DN100-300 steel pipe manufacturing, and length is to be subjected to the uniform 8-10mm circular hole of liquid part tube wall surface in its tower of 500-1000mm, and external parcel 20-60 eye mesh screen is positioned at the tower central position, and level attitude is lower than liquid outlet tank.Liquid distributor is a cone shape umbrella crown, and the umbrella crown angle is 120 degree, and hypotenuse is long to be 450-800mm.Absorption mother liquor liquid-inlet pipe feed liquor at the bottom of the tower, adsorption tail liquid is discharged adsorption tower by tower top liquid outlet tank and middle liquid outlet tank; Liquid-inlet pipe enters the tower central position at the bottom of by tower, and its below is a liquid distributor.Poor resin is added in the adsorption tower by cat head by advancing pitch tube, and saturated resin is put the resin mouth at the bottom of by tower and emitted outside the tower, and resin is moved once at the bottom of tower by cat head every some cycles.

The adsorption process of packed moving bed adsorption tower is finished in an equipment, simplifies the quantity of adsorption process and required an adsorption device greatly.Adsorption process: poor resin is added in the tower by pitch tube by cat head, absorption mother liquor by tower at the bottom of liquid-inlet pipe enter in the tower, distribute the back upwards to flow uniformly by liquid distributor, up to the top from liquid outlet tank and drain pipe overflow outside the tower, the resin of tower bottom fully contacts with the mother liquor that just advances tower, and is at first saturated, when resin is saturated when acquiring a certain degree, can release saturated resin from the resin mouth of putting of tower bottom in time, deliver in the eluting column, this just finishes an adsorption process.

Principle of work of the present utility model is as follows: the absorption mother liquor enters the adsorption tower from the bottom, producing one upwards pressure, resin bed integral body is upwards pushed away, during to tower top liquid outlet tank, because adsorption tail liquid is separated to outside the tower by liquid outlet tank and middle drain pipe, so formed one section dehydration resin layer at liquid outlet tank with top, it has pushed down resin bed, prevents from that resin from rising to overflow adsorption tower.In adsorption tower, the upward pressure that the absorption mother liquor produces makes resin be the state of pressing closely, and does not float and does not move, and improves adsorption efficiency greatly, makes the throughput maximization.The absorption mother liquor also coexists to the buoyancy of resin on this direction, has increased certain power for improving the mother liquor flow velocity.Middle drain pipe can in time be separated to the adsorption tail liquid that liquid outlet tank row in adsorption tower central position does not go out outside the tower, thereby has guaranteed not head tower of adsorption process, has guaranteed adsorption process ground steady running.The mode of time advancing to go up fluid has been adopted in absorption, avoided seston since gravity former thereby be deposited in the resin layer and adsorption tower in, thereby avoided liquid outlet tank and middle drain pipe blocked.The form that feeding device has adopted the simplest single tube and umbrella crown to cooperatively interact, it is even to have reached cloth liquid, less scaling, easy-to-maintain triple purposes.Resin in the adsorption process tower is saturated at first from the bottom, saturated resin is easy to just be transplanted on and carries out drip washing in the eluting column, improved resin revolution rate to greatest extent, shortened the duration of contact of resin and mother liquor, so not only be very beneficial for the separation of vanadium, but also when having taken away absorption, the continuous aluminium hydroxide of accumulation in the resin layer helps by a large amount of absorption mother liquors.

In whole adsorption process, mother liquor upwards is in the form of piston at the bottom of by tower uniformly and flows, and resin is even piston-type downwards by cat head and moves, and the solid-liquid two-phase has constituted a full counter current ion exchange process of ideal in tower.

The beneficial effect of the utility model equipment is:

The utility model equipment has simple in structure, low cost of manufacture, and the adsorption efficiency height, advantage such as production run is steady can be widely used in the hydrometallurgy industry, for example: the extraction of gallium and uranium and recovery.The utility model adsorption tower is applicable to that the former fluid viscosity of absorption is big, solid content height in the stoste, the low absorption working condition that waits of resin working capacity.

Description of drawings

Fig. 1 is the structural representation of the adsorption tower of packed moving bed.

Fig. 2 is that A-A among Fig. 1 is to sectional view.

Fig. 3 is a liquid outlet tank enlarged view shown in Figure 1.

Embodiment

The utility model is further described below with reference to embodiment (accompanying drawing).

Poor resin enters into adsorption tower and begins to adsorb by advancing pitch tube (1), next operation is emitted and be transported to saturated resin by putting resin mouth (8), emitted one time saturated resin at the bottom of the tower every one hour, tower head is added once poor resin, and resin is saturated successively from top to bottom and constantly move downward in tower.Absorption mother liquor liquid-inlet pipe (6) at the bottom of the tower enters the adsorption tower, by the distributional effects of liquid distributor (7), upwards flows uniformly, and adsorption tail liquid is collected outside the outflow tower by liquid outlet tank (3) and middle drain pipe (4), and is pooled in the overflow liquid bath (5).Mother liquor upwards is in the form of piston at the bottom of by tower uniformly and moves in the adsorption process, and resin is even piston-type downwards by cat head and moves, and the solid-liquid two-phase has constituted a full counter current ion exchange process of ideal in tower.

Claims

1. the adsorption tower of a packed moving bed, contain main part tower body (2), the top of described tower body is provided with into pitch tube (1), and the bottom is provided with puts resin mouth (8), the inside, described tower body top is provided with liquid outlet tank (3), middle drain pipe (4), the tower body outside is provided with overflow liquid bath (5), and the inside, bottom is provided with liquid-inlet pipe (6), liquid distributor (7), it is characterized in that: top of tower is put forward the pitch tube semicircular in shape, pipe outlet is positioned at the tower center, vertically downward, points in the tower; Liquid outlet tank (3) is uniform around tower wall girth, and its fluid mouth of pipe points to overflow liquid bath (5) outside tower; Liquid-inlet pipe (6) exports vertically downward, and over against liquid distributor (7), middle drain pipe (4) is contained in the middle and upper part in the tower.

2. according to the adsorption tower of right 1 described packed moving bed, it is characterized in that: liquid outlet tank (3) is uniform around tower wall girth, liquid outlet tank (3) is subjected to the uniform 8-10mm circular hole of liquid part surface in tower, external parcel 20-60 eye mesh screen, liquid outlet tank (3) is made by the DN80-150 steel pipe in the tower outside part, and its fluid mouth of pipe points to overflow liquid bath (5) outside tower.

3. according to the adsorption tower of right 1 described packed moving bed, it is characterized in that: middle drain pipe (4) is formed by the DN100-300 steel pipe manufacturing, length is to be subjected to the uniform 8-10mm circular hole of liquid part tube wall surface in its tower of 500-1000mm, external parcel 20-60 eye mesh screen, be positioned at the tower central position, level attitude is lower than liquid outlet tank (3).

4. according to the adsorption tower of right 1 described packed moving bed, it is characterized in that: liquid distributor (7) is a cone shape umbrella crown, and the umbrella crown angle is 120 degree, and hypotenuse is long to be 450-800mm.