CN101596441A

CN101596441A - The pipeline reactor of dress cross disc and the combination of other static mixing element in a kind of

Info

Publication number: CN101596441A
Application number: CNA2008101105471A
Authority: CN
Inventors: 刘兆彦; 施景云; 方旭; 师保锋; 涂智贤; 刘宇尘
Original assignee: Beijing Innovation Polymerization Technology Co Ltd
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2009-12-09

Abstract

A kind of pipeline reactor, alternately arrange in the pipe and disclosed pipe inner member cross disc of China Patent No. ZL03156621.9 (PCT/CN 2004/001002) and flight or cross bar banding pattern isoperimetric are installed to the stronger static mixing element of mixing ability, strengthen tube wall and conduct heat, guarantee that arbitrary section is radially even with the axial fluid state.

Description

The pipeline reactor of dress cross disc and the combination of other static mixing element in a kind of

Technical field:

The invention belongs to the chemical industry equipment field.

Technical background:

The pipeline reactor no-rotary part, bigger than heat transfer area, have a extensive future.Be minimizing flow through material state difference and augmentation of heat transfer in the reaction tube, people are everlasting and adorn various static mixing elements in the reaction tube, (U.S. Chemineer company claims Kenics as the flight type, China market claims the cross disc (China Patent No. ZL 03156621.9) of SK, cross bar banding pattern (Switzerland Sulzer company claims SMX, and China market claims the SX type) and inventor's invention etc.

The cross disc hybrid element is because of realizing pipe surrounding zone fluid and the coordinated transposition of central area fluid and pressure, thorough, degree of depth stripping borderline layer, have characteristics such as tube fluid time of staying narrowly distributing, radial temperature difference is little, heat-transfer capability is strong, flow resistance is low, have a clear superiority in than other type static mixing element; But its advantage is mainly reflected in radially homogenize and augmentation of heat transfer aspect, and circumferentially the homogenize ability dislikes not enough slightly.

The inventor calculate to find with CFD by experiment, compares with independent employing cross disc static mixing element, adopts cross disc alternately to arrange and can further improve the pipeline reactor performance with the circumferential stronger other forms of static mixing element of ability that mixes.

Summary of the invention:

The pipeline reactor of dress cross disc and the combination of other form static mixing element in of the present invention, comprise reaction tube 1, cross disc 2 as shown in Figure 1, circumferentially mix static mixing element 3, chuck 4, heating agent import 5, heating agent outlet 6 and the adpting flange 7 and the necessary instrument nozzle of other stronger form of ability.Static mixing element first-selection flight and cross strap that circumferentially the mixing ability is stronger.The combination of the static mixing element of cross disc and other form has multiple mode, and available single cross disc or the combination of a plurality of cross disc and single flight (or cross strap) or a plurality of flight (or cross strap) combined and alternatively are arranged; The polymerisation tube higher to material viscosity, preferred single cross disc and flight joins end to end, alternately arrange, and Instructions Page 3 the 15th row of the preferred China Patent No. ZL 03156621.9 of cross disc (PCT/CN2004/001002) is described, shown in the Figure of description 3 and the 7th of claims require described cross disc form.

Static mixing element and pipeline can adopt modes such as hot charging, the draw, welding or soldering to fix, and also can make the hybrid element outer rim be slightly less than bore, make it for convenience detach and clean in order to extracting out.Described all means are all those skilled in the art and know.

Compare with the pipeline reactor of other form static mixing element of interior dress, advantage of the present invention is:

1, the pipeline reactor of cross disc shown in Fig. 7,9 and flight assembled arrangement, cross disc can make central area and surrounding zone fluid coordinated transposition, pressure, thorough, degree of depth stripping borderline layer, and extremely strong radially mixing and augmentation of heat transfer ability are arranged, flight guiding fluid guarantees the uniformity of arbitrary section fluid state along rotating in a circumferential direction.

2, the pipeline reactor arranged of the combined and alternatively of cross disc shown in Figure 8 and cross strap, the cross strap hybrid element can be divided into mixed material some threads, good mixing effect, but resistance is bigger, the two is in conjunction with both realizing even mixing significantly reducing flow resistance again.

3, cross disc and flight shown in Figure 7 push up arrangement mutually from beginning to end mutually, the location are installed conveniently.

Description of drawings:

Fig. 1 is the pipeline reactor of interior dress cross disc and the combination of other form static mixing element.

Fig. 2 is the described cross disc of China Patent No. ZL 03156621.9 (PCT/CN2004/001002) claim 1, and cross disc is 4 passages among the figure; Arrow is represented flow direction of material, and wherein double-head arrow represents that material flows to the surrounding zone by central area, and single arrow represents that material flows to central area by the surrounding zone.

Fig. 3 is the described cross disc of China Patent No. ZL 03156621.9 (PCT/CN2004/001002) claim 2, and cross disc is 12 passages among the figure; Arrow is represented flow direction of material, and wherein double-head arrow represents that material flows to the surrounding zone by central area, and single arrow represents that material flows to central area by the surrounding zone.

Fig. 4 is that Instructions Page 3 the 15th row of China Patent No. ZL 03156621.9 (PCT/CN2004/001002) is described, shown in the Figure of description 3 and the 7th of claims require described cross disc, cross disc is 4 passages among the figure, and coils central two ends and import and export and be tubular; Arrow is represented flow direction of material, and wherein double-head arrow represents that material flows to the surrounding zone by central area, and single arrow represents that material flows to central area by the surrounding zone.

Fig. 5 is a spiral chip static mixing element.

Fig. 6 is a cross bar belt static mixing element.

Fig. 7 is the pipeline reactor that interior single cross disc of pipe and single flight replace the interior assembly combined static mixing element of arranging; Cross disc is a four-way cross disc shown in Figure 4 among the figure.

Fig. 8 is the pipeline reactor that interior single cross disc of pipe and single cross bar banding pattern static mixing element are alternately arranged.

Fig. 9 is the pipeline reactor that single cross disc and a pair of spiral chip static mixing element are alternately arranged.

Embodiment:

Below be embodiments of the invention, but protection scope of the present invention is not limited to following specific embodiment:

The pipeline that diameter 50mm is long 6 meters, flight and cross disc that interior dress is alternately arranged, be used for the pure and mild MDI reaction of polyester polyols and generate polyurethane, 210 ℃ of reaction temperatures, 300 seconds reaction time, because of guaranteeing fully to mix and avoid excessive shear, uniform in quality and stability have clear improvement than double-screw reactor.

Claims

1, a kind of pipeline reactor of interior assembly combined static mixing element is characterized in that alternately the arrangement described cross disc static mixing element of installation China Patent No. ZL03156621.9 (PCT/CN2004/001002) and circumferentially other stronger static mixing element of mixing ability in the pipe.

2, pipeline reactor according to claim 1 is characterized in that the first-selected flight of the stronger static mixing element of the ability of circumferentially mixing and two kinds of forms of cross strap (shown in Fig. 4,5).

3, according to claim 1,2 described pipeline reactors, it is characterized in that adopting Instructions Page 3 the 15th row of single Chinese patent ZL03156621.9 (PCT/CN2004/001002) described, shown in the Figure of description 3 and the 7th desired cross discs of claims (shown in this Figure of description 4) and single flight permutation and combination, as shown in Figure 7.