CN102527313A

CN102527313A - Chemical reaction kettle

Info

Publication number: CN102527313A
Application number: CN201210025920XA
Authority: CN
Inventors: 钟希平; 万国骅
Original assignee: JIANGSU AOSHUXIN THERMAL INSULATION MATERIALS CO Ltd
Current assignee: JIANGSU AOSHUXIN THERMAL INSULATION MATERIALS CO Ltd
Priority date: 2012-01-18
Filing date: 2012-01-18
Publication date: 2012-07-04

Abstract

The invention relates to a chemical reaction kettle, which belongs to the technical field of chemical reaction devices and comprises a kettle body, wherein a containing cavity is formed in the kettle body. A stirring rod extending into the containing cavity is arranged at the center of the top of the kettle body. An inner-ring coil heat exchanger and an outer-ring coil heat exchanger which are externally connected with heat exchange media are arranged between the stirring rod and the kettle body at intervals. At least one stirring arm axially extends out of the lower end of the stirring rod, and the outer end of the stirring arm upwards extends out of a stirring handle located between the inner-ring coil heat exchanger and the outer-ring coil heat exchanger. When reaction takes place, the inner sides and the outer sides of the inner-ring coil heat exchanger and the outer-ring coil heat exchanger simultaneously act, and the stirring arm at the lower portion of the kettle body and the stirring handle located between the inner-ring coil heat exchanger and the outer-ring coil heat exchanger continuously rotate for stirring, so that an even temperature field can be formed in the kettle in a control mode even though colloid-shaped reactants with poor heat conduction are filled in the reaction kettle.

Description

A kind of chemical reaction kettle

Technical field

The present invention relates to a kind of chemical reaction kettle, the agitated reactor that especially a kind of first rank phenol formaldehyde foam resins is used belongs to technical field of chemical reaction devices.

Background technology

Understand according to the applicant; The traditional processing technology of resol is complex equipments not only; Need through dewater, vacuumize, loaded down with trivial details processes such as boiler heating, the cooling of freezing, and the discharge of wastewater of one ton of phenolic resins of every production reaches 700 kilograms more than, is unfavorable for environmental protection.

Find that through retrieval application number is that the one Chinese patent application of CN200910226671.9 discloses a kind of method of utilizing paraformaldehyde to produce phenolic resins.The problem of long-term puzzlement enterprise developments such as inconvenient liquid formaldehyde transportation, energy resource consumption are big though this patented technology has overcome theoretically, contaminated environment; But in fact can not be applied to produce in batches; Because the process of utilizing paraformaldehyde to produce phenolic resins is exothermic reaction; And the thermal conductivity of product is very poor, produces the difficult problem that the big volume agitated reactor that adopts can't solve internal temperature control in batches.The cooling jacket structure that existing agitated reactor adopts only is applicable to laboratory or little volume agitated reactor; Can't solve the inside temperature control problem of big volume agitated reactor; (being commonly called as " quick-fried dashing " phenomenon) overflowed in the reactant boiling that is difficult to avoid lasting rising of Yin Wendu in the production process and causes; The result not only can cause waste of material, and reaction can't be proceeded, and is easy to cause accident.

Summary of the invention

Technical problem to be solved by this invention is: propose a kind of chemical reaction kettle that not only can solve an internal temperature control difficult problem conscientiously, thereby create conditions for utilizing paraformaldehyde to produce the phenolic foam resin in batches.

The technical scheme that the present invention solves its technical problem is following: a kind of chemical reaction kettle; Comprise the inner kettle that forms cavity volume; The top center of said kettle is settled the puddler that stretches in the cavity volume; The coil heat exchanger of the external heat transferring medium of inside and outside circle spaced apart between said puddler and the inner wall of kettle, the lower end of said puddler is radially extended a mixing arm at least, and the outer end of said mixing arm is extended the stirring handle between inside and outside circle coil heat exchanger up.When reacting; Owing to have an effect simultaneously inside and outside the two circle heat exchangers; The mixing arm of kettle bottom and the stirring handle between two circle heat exchangers continue the rotation stirring in addition; Even therefore be full of the very poor colloidal reactant of thermal conductivity in the agitated reactor, also can control and form comparatively even temperature field in the still.

The present invention further improves, and spiraling of said two circle heat exchangers is in the opposite direction.Like this; Not only the heat transferring medium in the Internal and external cycle coil heat exchanger helps the inner heat exchange of whole kettle mutually all the better because of flowing to; And reactant is when the coil pipe interval of the inside and outside circle coil heat exchanger of flowing through under the effect is ordered about in stirring; Can be directed producing underspin or on revolve trend, thereby reactant is fully mixed, reach the action effect of even temperature in the still.

Further perfect of the present invention be, has helicla flute on the said puddler, and spiraling of especially said spiral fluted rotation direction and inner ring heat exchanger is in the opposite direction.Like this, puddler, inner ring coil heat exchanger, outer ring coil heat exchanger will make near the reactant it produce mutually different rotation direction trend, and heat exchange each other is more abundant.

Description of drawings

Fig. 1 is the three-dimensional structure sketch map of one embodiment of the invention.

Fig. 2 is the two-dimensional structure sketch map of Fig. 1 embodiment.

The specific embodiment

Embodiment 1

Present embodiment is the chemical reaction kettle that is exclusively used in preparation first rank phenol formaldehyde foam resin, and is as depicted in figs. 1 and 2, and this agitated reactor comprises the inner kettle that forms cavity volume, and kettle top buckle closure has the loam cake 13 of unlimited charging aperture 14, and the bottom has the discharging opening 9 of valve control.The top center fixed conveyor support 16 of loam cake 13 is equipped with by the transmission mechanism transmission and stretches into the puddler 8 in the cavity volume in the transmission bracket 16.Inside and outside two circles spaced apart are respectively through being positioned at first import 1 on the loam cake 13, the inner ring coil heat exchanger 11 and the outer ring coil heat exchanger 12 of second import, 15 external cooling water sources between puddler 8 and the inner wall of kettle; Spiraling of two circle heat exchangers is in the opposite direction, and its

outlet

3,4 also is positioned at and covers.Has the helicla flute (not shown) that rotation direction and inner ring heat exchanger 11 spiral in the opposite direction on the shaft of puddler 8; Extend respectively at inside and outside circle coil heat exchanger 11, stirring handle 7 between 12 up the outer end that a pair of mixing arm 10, two mixing arms 10 are radially extended in its lower end.Except two circle coil heat exchangers, the kettle of this chemical reaction kettle is formed the chuck heat exchanger with bottom water inlet and side delivery port by shell 5 and inwall 6.2 for being positioned at the thermometer on the loam cake 13 among the figure.

During production; Materials such as NaOH, phenol, poly first and water are dropped in the agitated reactor by predetermined ratio, and start agitating device and stir, owing to have helicla flute on the puddler; Therefore not only can extend stirring handle through mixing arm produces stirring action between inside and outside circle coil heat exchanger; And within the inner ring coil heat exchanger, also can produce the stirring action of underspin, mixing uniformity obviously improves, thereby makes material reaction each other more abundant.When treating material generation chemical reaction release heat, open cooling water source as required, start inside and outside circle coil heat exchanger and chuck heat exchanger; Under the effect of three layers of heat exchanger; Temperature in the agitated reactor is effectively suppressed, and because the rotation direction of puddler, inner ring coil heat exchanger, outer ring coil heat exchanger replaces each other, near it reactant is produced revolve or underspin trend on mutually different; Mixing each other is more even, and heat exchange is also more abundant.At last, when question response product viscosity reaches predetermined value, add surfactant, improver etc., and control agitated reactor and suitably lower the temperature, open discharging opening, promptly obtain required first rank phenol formaldehyde foam resin.

Evidence, behind the agitated reactor of employing present embodiment, can be unlimited fully; Even viscosity is very big, the very poor first rank phenol formaldehyde foam resin intermediate reaction thing of heat-conductive characteristic, also can in still, form comparatively even temperature field by inside and outside heat exchanger, thoroughly avoid " quick-fried dashing " phenomenon; And the combination of heat-exchange system and agitating device; It is more even to make that also reactant mixes, and reacts more abundant, helps to improve the preparation quality of work efficiency and first rank phenol formaldehyde foam resin.

Claims

1. chemical reaction kettle; Comprise the inner kettle that forms cavity volume; The top center of said kettle is settled the puddler that stretches in the cavity volume; It is characterized in that: the coil heat exchanger of the external heat transferring medium of inside and outside circle spaced apart between said puddler and the inner wall of kettle, the lower end of said puddler is radially extended a mixing arm at least, and the outer end of said mixing arm is extended the stirring handle between inside and outside circle coil heat exchanger up.

2. chemical reaction kettle according to claim 1 is characterized in that: spiraling of said two circle heat exchangers is in the opposite direction.

3. chemical reaction kettle according to claim 1 and 2 is characterized in that: have helicla flute on the said puddler.

4. chemical reaction kettle according to claim 3 is characterized in that: spiraling of said spiral fluted rotation direction and inner ring heat exchanger is in the opposite direction.

5. chemical reaction kettle according to claim 4 is characterized in that: said kettle is formed the chuck heat exchanger with bottom water inlet and side delivery port by shell and inwall.