Many flow-disturbing spiral vinculum apptssTechnical field
The present invention relates in tubular reactor technical field.
Background technology
Pipe heat exchanger, it is most typical dividing wall type heat exchanger, and its application industrially has long history, andAnd still in all heat exchangers occupy leading position so far.Pipe heat exchanger mainly has housing, tube bank, tube sheet and envelope first class sectionsHow rounded composition, housing is, and inside is equipped with parallel tube bank, and tube bank two ends are fixed on end plate.Spiral shell is rotatably connected in tube bankKnob band (also known as twist iron, flow-disturbing band, twisted flat bar etc.), spiral band is mainly used in improving heat exchanger effectiveness.When fluid entersWhen entering in heat exchanger tube, spiral band causes fluid to enter turbulent condition, breaks tube wall retention layer, increases fluid and heat exchange tubeThe contact area (improve heat exchange efficiency) of wall, and the fluid of disorder can wash away to tube wall dirt.
Currently in order to preferably improving the heat exchange efficiency of spiral band, occur in that now a kind of using made by metal foamSpiral band, the patent application document of number of patent application 201410554444X discloses a kind of spiral vinculum apptss, the spiral knobBelting includes spiral band and support, and the spiral band is installed in rotation on support, and the spiral band is by metal foamFoam material is made.
Because metal foam refers to the special metal material containing foam pore, with high aeration, it is usually used in making streamBody filter, therefore the spiral band being made using metal foam, when spiral band carries out flow-disturbing work, in heat exchangerLiquid in impurity can enter foam pore, cause impurity to deposit, block spiral band on foam pore, bad cleaning.
Nano material refers at least one-dimensional in nano-scale (0.1-100nm) or by their conducts in three dimensionsThe material that elementary cell is constituted, this is about as much as the yardstick that 10～100 atoms are arranged closely together, therefore nano materialWith high intensity and high rigidity, and nano-material surface has hydrophobicity, will not be infected with impurity, it is ensured that nano-material surface is all the timeKeep cleaning.
The content of the invention
The purpose of the present invention is intended to provide that a kind of intensity is higher, and keeps many flow-disturbing spiral bands of spiral band cleaningDevice.
Many flow-disturbing spiral vinculum apptss in this programme, including support, are connected with spiral band, the spiral knob on supportBand is made up of nano material, and the nano material is made up of following material, and according to weight ratio, ZrO2 accounts for 30～60%, Al2O3 and accounts for20～35%；Si3N4 account for 20～45%, TiO2 account for 2～10%, Mn account for 0.05～0.1%, Si account for 0.05～0.1%, S account for 1～2%th, P accounts for 0.05～0.60%.
The operation principle of this programme：Spiral band is rack-mount, then many flow-disturbing spiral vinculum apptss are insertedHeat exchanger tube, when fluid enters heat exchanger tube after, stopped by spiral band while flow of fluid, make fluid in heat exchanger tubePortion forms turbulent flow, improves the flowing velocity of fluid, so as to improve heat exchange efficiency, due to spiral band be use nano material by30～60%, Al2O3 is accounted for according to ZrO2 account for 20～35%；Si3N4 account for 20～45%, TiO2 account for 2～10%, Mn account for 0.05～0.1%th, Si accounts for 0.05～0.1%, S and accounts for 1～2%, P and account for 0.05～0.60% proportioning and makes, now the quality of spiral bandLighter in movement, and there is no pore in spiral band surface, impurity that will not be in fluid-absorbent, it is ensured that spiral band existsCleaning is kept during Long-Time Service, without changing, the service life of spiral band is improved.
The beneficial effect of this programme：The present invention makes spiral band using nano material, makes spiral band keep high intensityAnd cleaning, improve the service life of spiral band.
Further, the nano material is made up of following material, and according to weight ratio, ZrO2 accounts for 44%, Al2O3 and accounts for 25%；Si3N4 accounts for 25%, TiO2 and accounts for 4%, Mn and account for 0.08%, Si and account for 0.07%, S and account for 1.5%, P and accounts for 0.35%, now spiral band toolThere are high intensity and high rigidity, will not damage, be easy to Long-Time Service.
Further, the nano material is made up of following material, and according to weight ratio, ZrO2 accounts for 40%, Al2O3 and accounts for20%；Si3N4 accounts for 30%, TiO2 and accounts for 8.3%, Mn and account for 0.05%, Si and account for 0.05%, S and account for 1.05%, P and accounts for 0.55%, now spiral shellKnob band has high intensity and high rigidity, will not damage, and is easy to Long-Time Service.
Further, the spiral band is cored screw tie, and fluid can flow through hollow position and through spiral band,The contact area of spiral band and fluid is increased, the flowing velocity of fluid is increased, so as to improve heat exchange efficiency.
Further, the spiral band is welded with support, it is ensured that spiral band forms one with support, with holder pivotsDrive spiral band to rotate together, make spiral band convection current body form turbulent flow, break retention layer, improve heat exchange efficiency.
Further, the spiral band is connected with holder pivots, and spiral band can be rotated individually in heat exchanger tube, with streamThe impact of body drives spiral band freely to rotate, and in heat exchanger tube turbulent flow is internally formed, and promotes heat exchange.
Description of the drawings
Fig. 1 is the structural representation of embodiment of the present invention spiral band；
Fig. 2 is the structure of a wherein tie piece of the invention.
Specific embodiment
Below by specific embodiment, the present invention is further detailed explanation：
Reference in Figure of description includes：Tie piece 1, weld bond 2.
Embodiment is basic as shown in accompanying drawing 1, Fig. 2：
Many flow-disturbing spiral vinculum apptss in this programme, including support, are connected with hollow spiral band on support, describedSpiral band is made up of nano material, and the nano material is made up of following material, according to weight ratio, ZrO2 accounts for 30～60%,Al2O3 accounts for 20～35%；Si3N4 account for 20～45%, TiO2 account for 2～10%, Mn account for 0.05～0.1%, Si account for 0.05～0.1%th, S accounts for 1～2%, P and accounts for 0.05～0.60%, and the spiral band includes three tie pieces 1, three tie pieces, 1 liang of two-phaseNeighbour is arranged, and the edge of the every tie piece 1 is machined with weld bond 2, is welded by weld bond 2 between two adjacent tie pieces 1,Spiral band is formed, by many flow-disturbing spiral vinculum apptss of the rack-mount formation of spiral band.
Embodiment 4
Three tie pieces 1 are welded together to form into two-by-two spiral band, and spiral band middle part forms turbulent flow together and leads toRoad, spiral band is welded on support and forms many flow-disturbing spiral vinculum apptss, and by the device inserting pipe-type heat exchanger, in workWhen making, fluid enters pipe heat exchanger, as holder pivots drive the rotation of stream spiral band, makes fluid in tubular type heat exchangerTurbulent flow is formed, because there is turbulent flow passageway at many flow-disturbing spiral vinculum apptss middle part, makes the fluid in middle part also form turbulent flow.
Welded using three tie pieces 1, increased the contact area of spiral band and fluid, in many flow-disturbing spiral bands dressWhen putting rotation, turbulent flow effect can be strengthened；Many flow-disturbing spiral vinculum apptss are inserted in tubular type heat exchanger, spiral band is made with pipeWall contact, can thinning retention layer, strengthen heat transfer effect；Multilayer turbulent flow is formed, increases flowing speed of the fluid in tubular type heat exchangerDegree, improves heat exchange efficiency.
Above-described is only embodiments of the invention, and the general knowledge here such as known concrete structure and characteristic is not made in schemeExcessive description.It should be pointed out that for a person skilled in the art, on the premise of without departing from present configuration, can be withSome deformations and improvement are made, these should also be considered as protection scope of the present invention, these are implemented all without the impact present inventionEffect and practical applicability.This application claims protection domain should be defined by the content of its claim, in specificationSpecific embodiment etc. records the content that can be used for explaining claim.