CN211921392U

CN211921392U - Polyurea polyol's serialization production facility

Info

Publication number: CN211921392U
Application number: CN202020504776.8U
Authority: CN
Inventors: 余卫红; 杨骏
Original assignee: Zhangzhou Lingang Junchi Chemical Co ltd
Current assignee: Cangzhou Junchi New Material Technology Co.,Ltd.
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-13
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a continuous production device of polyurea polyol, which comprises an agitator tank, a film evaporator and a condenser which are arranged from the upper stream to the lower stream in sequence, wherein the agitator tank is also connected with a first static mixer and a second static mixer which are both provided with two inlet pipes and a discharge pipe, the discharge pipe of the first static mixer is connected with a first branch pipe and a second branch pipe through a tee joint, the outlets of the first branch pipe and the second branch pipe are respectively positioned at the upper part and the middle part of the agitator tank, the rapid layered addition of basic reaction materials into the agitator tank is realized through the first branch pipe and the second branch pipe, so that the materials sent out by the first static mixer and the materials sent out by the second static mixer can be rapidly and fully mixed in the agitator tank, the stirring and staying reaction time of the mixed materials in the agitator tank is shortened, thereby effectively avoiding the polyurea molecular weight from becoming solid particles and precipitating out after becoming a certain degree.

Description

Polyurea polyol's serialization production facility

Technical Field

The utility model relates to a polyurea polyol synthesis equipment technical field, concretely relates to polyurea polyol's serialization production facility.

Background

The polyurea polyol is a dispersion liquid formed by polymerizing vinyl monomers in basic polyether, can replace inorganic filler, not only can enable polyurethane foam to have higher bearing capacity and good resilience performance, but also can enable the cellular structure and the physical and mechanical properties of the foam to be improved, the prior common production process of the polyurea polyol is divided into a gap type process and a continuous type process, a single-stage reaction kettle is adopted in the intermittent process, reaction materials are added into the reaction kettle to react to generate the polyurea polyol, the continuous process generally adopts a double-kettle flow, a first reaction kettle and a second reaction kettle are connected in series, the material sent out from the first reaction kettle continuously reacts in the second reaction kettle and is subjected to monomer recovery through a flash evaporator and a thin film evaporator to obtain the finished polyurea polyol, and the initial mixing degree and the stirring reaction time of the reaction materials are very important no matter the gap process or the continuous process, because the latex particles become larger gradually and the molecular weight of polyurea becomes larger along with the gradual progress of the reaction, the polyurea particles become solid particles and precipitate gradually and release to a certain degree, so that stable dispersion cannot be formed, and the quality of the finished polyurea polyol product is seriously affected, therefore, the polyurea polyol production equipment which can effectively ensure the mixing degree of initial reaction materials and reduce the stirring reaction time is very necessary.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the background art, the utility model aims to provide a polyurea polyol's serialization production facility, it has effectively solved the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a polyurea polyol's serialization production facility, includes agitator tank, film evaporator and the condenser that sets gradually from upper reaches to low reaches, be connected with evacuation pipe on the film evaporator, the condenser cooperation sets up on the evacuation pipe, still be connected with first static mixer and second static mixer on the agitator tank, all have two inlet pipes and a discharging pipe on first static mixer and the second static mixer, the discharging pipe of first static mixer has first branch pipe and second branch pipe through three way connection, the export of first branch pipe and second branch pipe is located respectively the upper portion and the middle part of agitator tank.

Furthermore, the two feeding pipes on the first static mixer are respectively a polyether feeding pipe and a TDI feeding pipe, and the two feeding pipes on the second static mixer are respectively a polyether feeding pipe and a hydrazine hydrate feeding pipe.

Further, the coaxial motor drive's (mixing) shaft that is provided with in the agitator tank, it moves the stirring piece to have evenly set firmly the multiunit along the axial on the (mixing) shaft, evenly set firmly the multiunit and move the stirring piece staggered distribution's of deciding the stirring piece along agitator tank direction of height on the inner wall of agitator tank.

Furthermore, the movable stirring piece and the fixed stirring piece are a plurality of radial columns which are uniformly distributed along the circumferential direction of the cross section of the stirring tank.

The utility model discloses following beneficial technological effect has:

the utility model discloses a first branch pipe and second branch pipe have realized that basic reaction material adds to the quick layering in the agitator tank for the material that first static mixer sent out and the material that the second static mixer sent out can be in rapid abundant mixture in the agitator tank, reduce the stirring dwell reaction time of misce bene material in the agitator tank, thereby effectively avoid polyurea molecular weight grow to certain extent and then become solid particle and deposit and appear, be favorable to improving the quality of follow-up finished product polyurea polyol.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a top view of the stirring tank with the stirring shaft removed according to the embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in FIGS. 1 and 2, the continuous production equipment for polyurea polyol according to the embodiment includes a stirring tank 1, a thin film evaporator 2 and a condenser 3 which are sequentially arranged from upstream to downstream, a vacuum tube 4 is connected to the thin film evaporator 2, the condenser 3 is cooperatively arranged on the vacuum tube 4, the stirring tank 1 is further connected with a first static mixer 5 and a second static mixer 6, the first static mixer 5 and the second static mixer 6 are respectively provided with two feeding tubes 7 and one discharging tube 8, the discharging tube 8 of the first static mixer 5 is connected with a first branch tube 9 and a second branch tube 10 through a tee joint, outlets of the first branch tube 9 and the second branch tube 10 are respectively located at the upper part and the middle part of the stirring tank 1, the two feeding tubes 7 of the first static mixer 5 are respectively a polyether inlet tube and a TDI inlet tube, polyether and isocyanate are respectively introduced into the polyether inlet tube and the TDI inlet tube, the two feeding pipes on the second static mixer 6 are respectively a polyether inlet pipe and a hydrazine hydrate inlet pipe, polyether and hydrazine hydrate are respectively introduced into the polyether inlet pipe and the hydrazine hydrate inlet pipe, the first static mixer 5 and the second static mixer 6 are preferably SV type static mixers produced by Nantong Wal petrochemical engineering Limited, the film evaporator 2 is a GXZ high-efficiency rotating film evaporator produced by Wuxi mechanical Mal, chemical engineering machinery Limited, and the condenser 3 is a stainless steel tube condenser produced by Wuxi permanent chemical engineering Equipment Limited.

Coaxial motor drive's (mixing) shaft 11 that is provided with in agitator tank 1, it has the multiunit to move stirring piece 12 to follow the even welding of axial on (mixing) shaft 11, move stirring piece 12 and be along the radial post of a plurality of 1 cross section circumference evenly distributed of agitator tank, it has multiunit and the fixed stirring piece 13 that moves stirring piece 12 staggered distribution to follow the even welding of 1 direction of height of agitator tank on the inner wall of agitator tank 1, it also is the radial post of a plurality of along 1 cross section circumference evenly distributed of agitator tank to decide stirring piece 13, move stirring piece 12 and decide stirring piece 13 and cooperate, further strengthened the mixed effect in the 1 unit interval of agitator tank, the reduction mixes abundant required time, this is favorable to avoiding the precipitation of polyurea molecule to appear.

The working principle of the embodiment is as follows:

the polyether and hydrazine hydrate mixture mixed by the second static mixer 6 enters the stirring tank 1, then the polyether and TDI mixture mixed by the first static mixer 5 enters the stirring tank 1 through the first branch pipe 9 and the second branch pipe 10 respectively, the two mixtures are mixed and react in the stirring tank 1 and then enter the thin film evaporator 2 through a pipeline, the temperature of the thin film evaporator 2 is kept at about 100 ℃, the vacuum degree is maintained at-0.098 MPa under the action of the vacuum pumping pipe 4, monomers in the reactants are evaporated and then condensed and recovered by the condenser 3, the refined polyurea polyol flows out from the bottom of the thin film evaporator 2, and the monomer content of the refined polyurea polyol can reach below 0.01 percent; in the process, as the mixture of the polyether and the TDI is simultaneously added into the mixture of the polyether and the hydrazine hydrate with different heights in the stirring tank 1 through the first branch pipe 9 and the second branch pipe 10, the mixing time of the polyether, the TDI and the hydrazine hydrate is fully shortened, the condition that the molecular weight of the polyurea is increased to a certain degree and then becomes solid particles and precipitates is avoided, the quality of the subsequent finished product polyurea polyol is ensured, the layered addition can also reduce the local reaction concentration, and the formation of large polyurea particles is further prevented.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a polyurea polyol's serialization production facility, includes agitator tank, film evaporator and the condenser that sets gradually from upper reaches to low reaches, be connected with evacuation pipe on the film evaporator, the condenser cooperation sets up on the evacuation pipe, a serial communication port, still be connected with first static mixer and second static mixer on the agitator tank, all have two inlet pipes and a discharging pipe on first static mixer and the second static mixer, the discharging pipe of first static mixer has first branch pipe and second branch pipe through the three way connection, the export of first branch pipe and second branch pipe is located respectively the upper portion and the middle part of agitator tank.

2. The continuous production equipment of polyurea polyol according to claim 1, wherein the two feeding pipes of the first static mixer are a polyether feeding pipe and a TDI feeding pipe, and the two feeding pipes of the second static mixer are a polyether feeding pipe and a hydrazine hydrate feeding pipe.

3. The continuous production equipment of polyurea polyol according to claim 1, wherein a motor-driven stirring shaft is coaxially arranged in the stirring tank, a plurality of sets of movable stirring members are uniformly and fixedly arranged on the stirring shaft along the axial direction, and a plurality of sets of fixed stirring members which are distributed with the movable stirring members in a staggered manner are uniformly and fixedly arranged on the inner wall of the stirring tank along the height direction of the stirring tank.

4. The continuous production equipment of polyurea polyol according to claim 3, wherein the dynamic stirring member and the static stirring member are radial columns uniformly distributed along the circumferential direction of the cross section of the stirring tank.