CN214636206U - Polyester catalyst adding system - Google Patents

Abstract

The utility model discloses a polyester catalyst adding system, wherein the discharge port of a catalyst feeding tank is respectively connected with a first gate valve and a second gate valve, the first gate valve is connected with a slurry mixing tank, the catalyst feeding tank is positioned above the slurry mixing tank, the slurry mixing tank is communicated with the esterification kettle through a slurry pump, the esterification kettle is communicated with the polycondensation kettle through an oligomer pump, the second gate valve is communicated with a pipeline at the feed inlet of the polycondensation kettle through a catalyst pump, thereby realizing double systems, having better flexibility, when one system has a fault, the standby system can be started, meanwhile, under the normal working condition, the system does not need to use a catalyst pump, reduces the consumption of electric energy and excessive maintenance cost of the catalyst pump, ensures that the utilization rate of the catalyst is not influenced, reduces the heat provided by the reaction, and can improve the production efficiency.

Description

Polyester catalyst adding system

Technical Field

The utility model discloses chemical fiber equipment technical field, concretely relates to polyester catalyst interpolation system.

Background

In the existing esterification reaction, catalyst is pumped into a pipeline between an esterification kettle and a polycondensation kettle through a catalyst pump, and the mode has the following defects:

firstly, the method comprises the following steps: the use of a catalyst pump not only consumes power, but also requires periodic pump switching, filter cleaning, etc., which increases the labor intensity of the operator and increases the maintenance cost of the catalyst pump.

Secondly, the method comprises the following steps: once the catalyst pump is stopped, the material reaction is influenced, and the working efficiency is influenced.

Thirdly, the method comprises the following steps: the inner wall and the bottom of thick liquids blending tank can pile up there is thick liquids in long-term use in-process, when thick liquids are piled up to a certain extent, thick liquids can agglomerate and drop to deposit thick liquids pump import, cause thick liquids pump import to be stifled deadly, not only influence production efficiency, increased the cost of maintenance of thick liquids pump simultaneously.

Fourthly: if the temperature of the catalyst is 120-150 ℃, the temperature in the esterification kettle is up to 270 ℃, if the catalyst is directly pumped into the esterification kettle, the catalyst is immediately vaporized to influence the using effect of the catalyst, if the catalyst is pumped into a pipeline between the esterification kettle and the polycondensation kettle, the temperature of the oligomer is reduced after the catalyst and the oligomer are mixed because the temperature of the oligomer pumped out of the esterification kettle is 260-270 ℃, and the temperature of the polycondensation reaction in the polycondensation kettle is 285-290 ℃, so that the process of mixing the catalyst and the oligomer and then entering the polycondensation kettle can generate certain influence on the polycondensation reaction and also causes heat waste.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a polyester catalyst adds system.

The utility model provides a polyester catalyst addition system, is including catalyst feeding jar, thick liquids blending tank, esterification kettle and polycondensation kettle, the discharge gate punishment of catalyst feeding jar is respectively through first gate valve of pipeline fixedly connected with and second gate valve, first gate valve passes through the pipe connection thick liquids blending tank, catalyst feeding jar is located the top of thick liquids blending tank, the discharge gate of thick liquids blending tank pass through the thick liquids pump with the feed inlet of esterification kettle is linked together, the discharge gate of esterification kettle pass through the oligomer pump with the feed inlet of polycondensation kettle is linked together, the second gate valve pass through the catalyst pump with the feed inlet of polycondensation kettle is linked together.

Preferably, a flow control mechanism is fixedly connected to a pipeline between the catalyst feeding tank and the slurry mixing tank, and the flow control mechanism comprises a regulating valve, a first flow meter and a third gate valve which are sequentially connected.

Preferably, a second flowmeter is fixedly connected to a pipeline between the catalyst pump and the feed inlet of the polycondensation kettle.

Preferably, the feed inlet of the slurry mixing tank is located at the top end thereof.

Preferably, the distance between the catalyst feeding tank and the slurry mixing tank is 8-12 m.

Preferably, a rotating shaft is rotatably fixed in the slurry mixing tank, penetrates through the bottom of the slurry mixing tank and is fixedly connected to the output end of the rotating motor, and a stirring blade is fixed on the rotating shaft.

Preferably, the stirring blades are distributed on the periphery circle of the rotating shaft in a cylindrical mode, flexible brush bodies are fixed on the stirring blades, and the flexible brush bodies are attached to the inner wall of the slurry mixing tank.

The utility model has the advantages that:

(1) the utility model discloses a polyester catalyst addition system opens first gate valve, and the third gate valve, the catalyst that adds are added in the thick liquids mixing tank because self gravity and flow control mechanism control flow add, and the cauldron of esterifying is added to after stirring blade's stirring with thick liquids and is carried out esterification reaction, obtains the oligomer, and the oligomer carries out polycondensation reaction in the polycondensation cauldron through oligomer pump income to realize following effect: firstly, a catalyst pump is not needed, so that the consumption of electric energy and excessive maintenance cost for the catalyst pump are reduced; secondly, the heat provided by the reaction is reduced while the utilization rate of the catalyst is not influenced; thirdly, the addition of the catalyst can accelerate the esterification reaction and improve the production efficiency.

(2) The utility model discloses a polyester catalyst addition system has dual implementation mode, when utilizing catalyst self gravity to carry out the system of feeding and breaking down, closes first gate valve, opens the second gate valve, thereby participates in the reaction through catalyst pump with catalyst pump income polycondensation cauldron and esterification cauldron between the pipeline, then the system of trouble overhauls. Can satisfy the simple transformation of present operating mode like this, and if under emergency, still can reach the operating mode of original design, improve the flexibility ratio of production.

(3) The utility model discloses a polyester catalyst adds system, it is including the thick liquids blending tank, rotate in the thick liquids blending tank and be fixed with the pivot, be fixed with stirring vane in the pivot, the last flexible brush body that is fixed with of stirring vane to not only can realize the effect of stirring, make thick liquids and catalyst misce bene, can realize the brush simultaneously and sweep the inner wall and the bottom of thick liquids blending tank, prevent that thick liquids from piling up the phenomenon of blockking up the import of thick liquids pump in inner wall and bottom, improved production efficiency, reduced the maintenance cost of equipment.

Drawings

FIG. 1 is a schematic structural view of a polyester catalyst adding system according to the present invention;

FIG. 2 is a schematic view of the catalyst tank structure of the present invention;

fig. 3 is a schematic view of the upper annular plate structure of the present invention.

In the figure: the device comprises a first gate valve 1, a third gate valve 2, a first flow meter 3, a regulating valve 4, a catalyst feeding tank 5, a slurry mixing tank 6, a catalyst pump 7, an esterification kettle 8, a polycondensation kettle 9, an oligomer pump 10, a second gate valve 11, a second flow meter 12, a slurry pump 13, a rotating shaft 61, a stirring blade 62 and a flexible brush body 63.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, which illustrate only some embodiments of the invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to the attached drawings, a polyester catalyst adding system comprises a catalyst feeding tank 5, a slurry mixing tank 6, an esterification kettle 8 and a polycondensation kettle 9, wherein a first gate valve 1 and a second gate valve 11 are fixedly connected to a discharge port of the catalyst feeding tank 5 through a pipeline respectively, the first gate valve 1 is connected with the slurry mixing tank 6 through a pipeline, the catalyst feeding tank 5 is positioned 8 m-12 m above the slurry mixing tank 6, a feed port of the slurry mixing tank 6 is positioned at the top end of the slurry mixing tank, so that a catalyst in the catalyst feeding tank 5 automatically flows into the slurry mixing tank 6 due to self gravity without consuming extra electric power, the discharge port of the slurry mixing tank 6 is communicated with a feed port of the esterification kettle 8 through a slurry pump 13, and the discharge port of the esterification kettle 8 is communicated with a feed port of the polycondensation kettle 9 through an oligomer pump 10, the second gate valve 11 is communicated with a feed inlet of the polycondensation kettle 9 through a catalyst pump 7, a flow control mechanism is fixedly connected to a pipeline between the catalyst feeding tank 5 and the slurry mixing tank 6, and the flow control mechanism comprises a regulating valve 4, a first flow meter 3 and a third gate valve 2 which are sequentially connected. And a second flowmeter 12 is fixedly connected to a pipeline between the catalyst pump 7 and the feed inlet of the polycondensation kettle 9.

The specific working process comprises the following steps: open first gate valve 1, third gate valve 2, the catalyst that adds is added into thick liquids blending tank 6 because self gravity and flow control mechanism control flow, and the catalyst mixes the back with thick liquids through stirring of stirring vane 62 and adds to esterification reaction in esterification reaction cauldron 8 carries out the esterification reaction, obtains the oligomer, and the oligomer is gone into in polycondensation cauldron 9 through oligomer pump 10 pump and is carried out polycondensation reaction, and the intentional effect of whole flow lies in:

firstly, the method comprises the following steps: the catalyst pump 7 is not needed, so that the consumption of electric energy and excessive maintenance cost for the catalyst pump 7 are reduced;

secondly, the method comprises the following steps: the utilization rate of the catalyst is not influenced (if the catalyst is directly added into the esterification kettle 8, the catalyst is vaporized due to overhigh temperature of the esterification kettle 8 to influence the utilization rate of the catalyst), the heat provided by the reaction is reduced (if the catalyst is pumped into the esterification kettle directly, the catalyst is vaporized immediately to influence the use effect of the catalyst, if the catalyst is pumped into a pipeline between the esterification kettle and the polycondensation kettle, the temperature of the oligomer pumped out of the esterification kettle is 260-270 ℃, the temperature of the oligomer is reduced after the catalyst is mixed with the oligomer, and the temperature of the polycondensation reaction in the polycondensation kettle is 285-290 ℃, so that the process of mixing the catalyst and the oligomer and then entering the polycondensation kettle can generate certain influence on the polycondensation reaction and waste heat);

thirdly, the method comprises the following steps: the addition of the catalyst can accelerate the esterification reaction and improve the production efficiency. After the catalyst is added into the slurry mixing tank 6, the proportion of EG is improved, the esterification reaction can be promoted, the temperature of the esterification kettle can be reduced on the premise of the same esterification reaction, and after the catalyst is added into the esterification reaction, the esterification reaction and the polycondensation reaction can be increased.

Specifically, when the above system malfunctions, the first gate valve 1 is closed, the second gate valve 11 is opened, the catalyst is pumped between the pipes of the polycondensation reactor 9 and the esterification reactor 8 by the catalyst pump 7 to participate in the reaction, and then the malfunctioning system is repaired. Can satisfy the simple transformation of present operating mode like this, and if under emergency, still can reach the operating mode of original design, improve the flexibility ratio of production.

Specifically, a rotating shaft 61 is rotationally fixed in the slurry mixing tank 6, the rotating shaft 61 penetrates through the bottom of the slurry mixing tank 6 and is fixedly connected to the output end of the rotating motor, a stirring blade 62 is fixed on the rotating shaft 61, the stirring blade 62 is distributed on the excircle of the rotating shaft in a cylindrical manner, a flexible brush 63 is fixed on the stirring blade 62, the flexible brush 63 is attached to the inner wall of the slurry mixing tank 6, when the rotating motor rotates to drive the rotating shaft 61 to rotate, the rotating shaft 61 rotates to drive the stirring blade 62 to rotate, so that the catalyst and the slurry are sufficiently mixed, when the rotating blade 62 rotates, the flexible brush 63 on the rotating blade 62 also brushes the inner wall and the bottom of the slurry mixing tank 6 at any time, the slurry is prevented from being accumulated on the inner wall and the bottom, and when the slurry is accumulated to a certain degree, the slurry can be agglomerated and fall off, and the sludge is deposited at the inlet of the slurry pump, so that the inlet of the slurry pump is blocked, the production efficiency is improved, and the maintenance cost of equipment is reduced.

Specifically, the discharge hole is formed in the bottom of the slurry mixing tank 6, and the brush body notch 64 is formed in the position, located at the discharge hole, of the flexible brush body 63, so that the flexible brush body 63 is prevented from affecting the discharge of the slurry when the bottom of the slurry mixing tank 6 is brushed and swept.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a polyester catalyst addition system, is including catalyst feeding jar (5), thick liquids blending tank (6), esterification kettle (8) and polycondensation kettle (9), its characterized in that: the discharge gate punishment of catalyst feeding jar (5) is respectively through first gate valve (1) of pipeline fixedly connected with and second gate valve (11), first gate valve (1) is through pipe connection thick liquids blending tank (6), catalyst feeding jar (5) are located the top of thick liquids blending tank (6), the discharge gate of thick liquids blending tank (6) pass through thick liquids pump (13) with the feed inlet of esterification kettle (8) is linked together, the discharge gate of esterification kettle (8) pass through oligomer pump (10) with the feed inlet of polycondensation kettle (9) is linked together, second gate valve (11) pass through catalyst pump (7) with the pipeline of the feed inlet department of polycondensation kettle (9) is linked together.

2. The polyester catalyst addition system according to claim 1, wherein: the catalyst feeding tank (5) and the pipeline between the slurry mixing tanks (6) are fixedly connected with a flow control mechanism, and the flow control mechanism comprises a regulating valve (4), a first flowmeter (3) and a third gate valve (2) which are sequentially connected.

3. The polyester catalyst addition system according to claim 1, wherein: and a second flowmeter (12) is fixedly connected to a pipeline between the catalyst pump (7) and the feed inlet of the polycondensation kettle (9).

4. The polyester catalyst addition system according to claim 1, wherein: the feed inlet of the slurry mixing tank (6) is positioned at the top end of the slurry mixing tank.

5. The polyester catalyst addition system according to claim 1, wherein: the distance between the catalyst feeding tank (5) and the slurry mixing tank (6) is 8-12 m.

6. The polyester catalyst addition system according to claim 1, wherein: the rotary shaft (61) is fixed in the slurry mixing tank (6) in a rotating mode, the rotary shaft (61) penetrates through the bottom of the slurry mixing tank (6) and is fixedly connected to the output end of the rotating motor, and the rotary shaft (61) is fixed with stirring blades (62).

7. The polyester catalyst addition system according to claim 6, wherein: stirring vane (62) be cylindricly distribute in on the peripherical circle of pivot, be fixed with flexible brush body (63) on stirring vane (62), flexible brush body (63) with the inner wall of thick liquids blending tank (6) is laminated mutually.

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