CN201214732Y

CN201214732Y - Dissolving tank

Info

Publication number: CN201214732Y
Application number: CN 200820300992
Authority: CN
Inventors: 陈文�
Original assignee: Yibin Grace Group Co Ltd
Current assignee: Yibin Grace Group Co Ltd
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2009-04-01
Anticipated expiration: 2018-06-03

Abstract

The utility model discloses a dissolving tank which can dissolve solutes more evenly. The dissolving tank comprises a tank body, and an agitator arranged in the tank body. The agitator comprises an agitator shaft and agitator blades arranged on the agitator shaft; at least two agitator blades comprising a bent blade and a straight blade are arranged on the agitator shaft in the axial direction. The bent blade is a bent plate-type blade which is bent in the longitudinal direction of the blade; the straight blade is a flat plate-type blade. All of the agitator blades are arranged vertical to the agitator shaft; baffle plates are arranged on the inner wall of the tank body. As the bent blade can move liquid towards the bottom of the tank and the straight blade can move liquid toward the tank wall, the mixture of solvent and solute circulates in the tank. In addition, the baffle plates are arranged symmetrically on the inner wall of the dissolving tank so that liquid forms vortex; the solvent and the solute are mixed and dissolved more unevenly; a heat conducting medium can be fed through a jacket arranged outside the tank body as required, thus promoting solution. The dissolving tank is in particular applicable to dissolve cellulose pulp in the solvent of NMMO.

Description

Dissolving tank

Technical field

The utility model relates to the dissolving tank in a kind of cellulose production field, and especially a kind of NMMO solvent is to the dissolving tank of cellulose pulp.

Background technology

When the preparation cellulose, a kind of novel dissolvent is that N methyl N morpholine oxide is the NMMO solvent, because the NMMO solvent toxicity is very little, therefore very environmental protection in solvent method fiber is produced, utilizes the NMMO solvent that cellulose pulp is carried out the preliminarily solubilised compliance with environmental protection requirements.What adopt in the existing cellulose dissolution operation is the dissolving tank that agitator is arranged, cellulose pulp and NMMO solvent are added into the dissolving tank that has agitator, make cellulose pulp and NMMO solvent reaction dissolving, but because this solvent viscosity is very high, solute effect is bad, and dissolving is even inadequately and dissolution velocity is slower.

The utility model content

In order to improve the effect of NMMO solvent to the cellulose pulp preliminarily solubilised, technical problem to be solved in the utility model has provided a kind of making and has dissolved more uniform dissolution jar.

The technical scheme that its technical problem that solves the utility model adopts is: dissolving tank, comprise tank body and be arranged on the interior agitator of tank body, agitator comprises shaft and the stirring vane that is installed on the shaft, be provided with the two-layer at least stirring vane that comprises hinged joint layer blade and straight leaf layer blade on the shaft vertically, hinged joint layer blade is the folded plate type blade that vertically bends along blade, straight leaf layer blade is flat blade, and all stirring vanes are all installed perpendicular to shaft.

The beneficial effects of the utility model are: hinged joint layer blade makes the liquid straight leaf layer blade that move at the bottom of jar that liquid is moved to tank skin, thus make the mixing material of solvent and solute form jar in circulation; Simultaneously, the dissolving tank inwall has symmetrically arranged baffle plate, makes liquid form eddy current, and the mixing of solvent and solute, dissolving are more even; And the chuck that is arranged on outside the tank body can pass to heat-conducting medium as required, promotes dissolving.

Description of drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Be labeled as motor 1, reductor 2, shaft coupling 3 among the figure, drive bearing 4, stuffing box 5, material inlet 6, upper cover 7, peep hole 8, hinged joint layer blade 9, flange 10, bearing 11, shaft 12, temperature detection mouth 13, tank body 14, chuck medium inlet 15, material outlet 16, straight leaf layer blade 17, chuck 18, chuck media outlet 19, chuck drain 20, pressure detecting mouth 21, vacuum port 22, baffle plate 23.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further specified.

As depicted in figs. 1 and 2, dissolving tank of the present utility model, comprise tank body 14 and the agitator that is arranged in the tank body 14, agitator comprises shaft 12 and the stirring vane that is installed on the shaft 12, be provided with the two-layer at least stirring vane that comprises hinged joint layer blade 9 and straight leaf layer blade 17 on the shaft 12 vertically, hinged joint layer blade 9 is the folded plate type blade that vertically bends along blade, and straight leaf layer blade 17 is flat blade, and all stirring vanes are all installed perpendicular to shaft 12.Stirring vane vertically be shaft 12 radially.Determine the axial installation site of stirring vane and the overbending direction of hinged joint layer blade 9 according to the direction of rotation of shaft 12, the liquid level of mixing material, overlook the observation dissolving tank, when shaft 12 turns clockwise, the limb of hinged joint layer blade 9 and the intersection point of shaft 12 are upper left bottom right, to guarantee that hinged joint layer blade 9 moves liquid at the bottom of jar, simultaneously, straight leaf layer blade 17 makes liquid move to tank skin, thereby the mixing material that makes solvent and solute forms a jar interior circulation, and solute can be dissolved among the solvent quickly.Overlook the observation dissolving tank, when shaft 12 was rotated counterclockwise, it is upper right that the limb of hinged joint layer blade 9 and the intersection point of shaft 12 should be the lower-left mutually, to guarantee hinged joint layer blade 9 liquid moved at the bottom of jar.

As depicted in figs. 1 and 2, tank body 14 inwalls be provided with at least two with the straight baffle plate 23 of jar dolly, baffle plate 23 is with respect to the symmetrical installation in shaft 12 axial line centers, when shaft 12 rotates, liquid can form eddy current, make solvent and solute mixing, the dissolving more even.Described baffle plate 23 can be flat board, also can be flap, can be two, also can be three, four etc.Certainly, should be gapped between the baffle plate 23, also should be gapped between baffle plate 23 and the stirring vane, in order to avoid baffle plate 23 interferes each other or between baffle plate 23 and the stirring vane, this belongs to common practise.

As depicted in figs. 1 and 2, tank body 14 is outside equipped with chuck 18, also is provided with chuck medium inlet 15 and chuck media outlet 19 on the chuck 18, can pass to heat-conducting medium as required in chuck 18, promotes dissolving.

As depicted in figs. 1 and 2, also can be provided with chuck drain 20 on the chuck 18 and be used for discharging gas that heat-conducting medium carries secretly etc.

As depicted in figs. 1 and 2, also can be provided with temperature detection mouth 13 on tank body 14 and the chuck 18, be used for detected temperatures, the solution temperature of control dissolving tank.

Temperature detection mouth 13 can be provided with two or more, each temperature detection mouth 13 is separately positioned on the diverse location of tank body 14 and chuck 18, be used to detect the temperature of diverse location, judge whether mixing is even, when mixing evenly, the temperature difference of each temperature detecting point is less, when mixing is inhomogeneous, the temperature difference of each temperature detecting point is bigger, and in view of the above the flow of heat-conducting medium, flow velocity etc. is adjusted.

In order to make the chuck medium fully mobile in chuck 18, carry out heat exchange effectively, realize the purpose of temperature control, chuck medium inlet 15 is arranged on the bottom of chuck 18 and chuck media outlet 19 is arranged on the top of chuck 18.

Especially, when dissolving tank of the present utility model is used for the NMMO solvent to the dissolving of cellulose pulp, hinged joint layer blade 9 along blade vertically the angle of bending be 30 °～45 °, in obtuse angle, be suitable for the viscosity of these two kinds of materials between the blade face of the same side.

Especially, when dissolving tank of the present utility model is used for the NMMO solvent to the dissolving of cellulose pulp, hinged joint layer blade 9 and straight leaf layer blade 17 respectively have two, be 180 ° of angles between the individual layer blade mutually, be 90 ° of angles mutually between hinged joint layer blade 9 and the straight leaf layer blade 17, mixed dissolution effect preferably can be arranged.

When agitator with the motor was driving, agitator was connected with motor 1, and at this moment, described motor 1 should adopt the adjustable speed motor by Frequency Converter Control, selects different rotating speeds to adapt to the solute and the solvent of different viscosities as required.

Claims

[claim 1] dissolving tank, comprise tank body (14) and be arranged on the interior agitator of tank body (14), agitator comprises shaft (12) and is installed in stirring vane on the shaft (12), it is characterized in that: be provided with the two-layer at least stirring vane that comprises hinged joint layer blade (9) and straight leaf layer blade (17) on the shaft (12) vertically, hinged joint layer blade (9) is the folded plate type blade that vertically bends along blade, straight leaf layer blade (17) is flat blade, and all stirring vanes are all installed perpendicular to shaft (12).
[claim 2] dissolving tank as claimed in claim 1 is characterized in that: tank body (14) inwall be provided with at least two with the straight baffle plate (23) of jar dolly, baffle plate (23) is with respect to the symmetrical installation in shaft (12) axial line center.
[claim 3] dissolving tank as claimed in claim 1 is characterized in that: tank body (14) is outside equipped with chuck (18), also is provided with chuck medium inlet (15) and chuck media outlet (19) on the chuck (18).
[claim 4] dissolving tank as claimed in claim 3 is characterized in that: also be provided with chuck drain (20) on the chuck (18).
[claim 5] dissolving tank as claimed in claim 3 is characterized in that: also be provided with temperature detection mouth (13) on tank body (14) and the chuck (18).
[claim 6] dissolving tank as claimed in claim 5 is characterized in that: temperature detection mouth (13) has more than two at least, and each temperature detection mouth (13) is separately positioned on the diverse location of tank body (14) and chuck (18).
[claim 7] is characterized in that as any described dissolving tank of claim in the claim 3～6: chuck medium inlet (15) are arranged on the bottom of chuck (18) and chuck media outlet (19) is arranged on the top of chuck (18).
[claim 8] dissolving tank as claimed in claim 1 is characterized in that: hinged joint layer blade (9) along blade vertically the angle of bending be 30 °～45 °, between the blade face of the same side in obtuse angle.
[claim 9] dissolving tank as claimed in claim 1, it is characterized in that: hinged joint layer blade (9) and straight leaf layer blade (17) respectively have two, be 180 ° of angles between the individual layer blade mutually, be 90 ° of angles mutually between hinged joint layer blade (9) and the straight leaf layer blade (17).
[claim 10] dissolving tank as claimed in claim 1 is characterized in that: agitator is connected with motor (1), and described motor (1) adopts the adjustable speed motor by Frequency Converter Control.