Multieffect evaporator
阅读：782发布：2023-10-21
专利汇可以提供Multieffect evaporator专利检索，专利查询，专利分析的服务。并且A multiple effect evaporator for use in the distillation of liquids in general and of the kind wherein evaporation takes place on the outside of substantially horizontal heat exchange tubes as a result of the heating of the inside of the tubes. The invention is particularly but not exclusively concerned with the use of such a multiple effect evaporator in the production of water from a solution of non-volatile solutes in water, for example sea water.，下面是Multieffect evaporator专利的具体信息内容。
1. A multiple effect evaporator, comprising: a housing; a plurality of substantially vertical parallel tube sheets connected to the interior of said housing; a plurality of effects in said housing each effect defined between a pair of said tube sheets the effects being substantially aligned; a plurality of substantially aligned bundles of substantially horizontally extending condenser tubes, one of said bundles being located in each of said effects, the constituent tubes of each said bundle being supported adjacent one set of open ends thereof by one of said tube sheets through which said ends extend; a plurality of openwork grids connected to the interior of said housing through each of which the tubes of one of said bundles extend; sealing means for sealing said sets of open ends to said tube sheets; non-condensible gas discharge vents with restricted diameter compared with the inner diameter of said tubes, connected to the ends of said tubes opposite the tube sheet ends; solution introducing means for introducing solution into the upper portions of each effect in such a manner that it flows downwardly under gravity in film form over and around said tubes; heated vapor introducing means for introducing heated vapors into the open ends of the tubes of the first and hottest effect to undergo heat exchange with the downflowing solution in said effect, as a result of which a portion of the solution vaporizes and at least a portion of the vapors condenses in said tubes; vapor passing means for passing the vapors from one effect into the tubes of a subsequent effect, in such a manner that vapor flow in each effect is in a direction substantially parallel to the tubes in that effect and the passage of vapors throughout all the effects involving substantially no changes in flow direction; and collecting means for respectively collecting and removing condensate and concentrate products.
2. A multiple effect evaporator according to claim 1 further including means for passing condensate and concentrate products from one effect respectively into the condensate and concentrate products of a subsequent effect.
3. A multiple effect evapOrator according to claim 1 further including means for returning at least a portion of the condensate product produced in the first effect to said heated vapor introducing means.
4. A multiple effect evaporator according to claim 1, further including a condenser and means for passing the vapors produced in a final and coolest effect together with the non-condensible gases which accumulate in that effect to said condenser.
5. A multiple effect evaporator according to claim 1, further including a compression system and wherein the vapor outlet in the final and coolest effect is coupled to the suction of said compression system, the discharge of which is coupled to said heated vapor introducing means or a first effect of a subsequent and similar evaporator.
6. A multiple effect evaporator according to claim 1, further including a compression system and wherein the final and coolest effect serves as a condenser which is coupled to the suction end of said compression system for the purpose of removing non-condensible gases.
7. A multiple effect evaporator according to claim 1, wherein said collecting means collects and removes the total concentrate and condensate products from the final and coolest effect.
8. A multiple effect evaporator according to claim 1, wherein said solution introducing means comprises a manifold by which said solution is introduced in parallel into said effects.
9. A multiple effect evaporator according to claim 1, wherein each tube extends through a corresponding aperture formed in said tube sheet and wherein said sealing means comprise a resilient electrically insulating grommet located in each of said apertures.
10. A multiple effect evaporator according to claim 1, further including bungs filling the ends of said tubes opposite the tube sheet ends and wherein said vents are located in said bungs.
11. A multiple effect evaporator according to claim 1, further including a plurality of a droplet separator arrangements, each of which being secured to said housing between the vented ends of said tubes of one effect and the tube sheet of the subsequent effect.
12. A multiple effect evaporator according to claim 1, wherein said collecting means includes, in the base portion of each effect, a concentrate collector, a concentrate duct communicating with said concentrate collector, a condensate trough, and a condensate duct communicating with the condensate trough, concentrate and condensate ducts of successive effects respectively communicating with each other.
13. A multiple effect evaporator according to claim 1, wherein said tubes are slightly inclined with respect to the horizontal downwardly with respect to said open ends.
14. A multiple effect evaporator according to claim 1, wherein said tubes are formed of aluminum or an aluminum alloy.
15. A multiple effect evaporator according to claim 1, wherein said tubes sheets are formed of aluminum or aluminium alloy.
16. A multiple effect evaporator according to claim 1, for use in the desalination of water where said solution is brackish or sea water and wherein said vapors are constituted by steam.
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