New type non-agitating multiplayer pre-polycondensation kettle for polyester
A pre-polycondensation reactor without stirring technology is applied in the field of pre-polycondensation reactors of polyester devices, which can solve problems such as dead corners and bottom material channeling, and achieve the effects of fewer units, low manufacturing and operating costs, and stable device operation.
Inactive Publication Date: 2006-10-11
BEIJING INNOVATION POLYMERIZATION TECH
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Problems solved by technology
However, according to the conventional feeding and discharging method, if there is no agitation, the bottom material will have serious channeling and dead ends, and it is a last resort to set up agitation
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[0026] The present invention is further illustrated with the following specific embodiments in conjunction with the accompanying drawings, but the scope of protection of the present invention is not limited to the following specific embodiments.
[0027] In this scheme, the precondensation kettle is provided with two ring-shaped partitions 5, including three-layer reaction zones, and two circles of guide spiral plates 7 are arranged on the ring-shaped partitions at the bottom of the first and second layer reaction zones. The oligomer from the esterification tank is pumped or by liquid level difference through the feed port a 1 Enter the first floor reaction area, such as figure 2 As shown, it flows in from above the inner end of the guide spiral plate, flows along the guide spiral plate from the inside to the outside, absorbs the heat of the heating coil to maintain the process setting temperature, and starts from b 1 Outflow, through the external connection into the second l...
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The invention relates to a non-stirring multi-layer polyester precondensation kettle. The inner space of the kettle is divided into a multi-layer reaction zone and a central steam channel zone by a multi-layer annular partition plate and a central pipe; each reaction layer above the bottom of the kettle A diversion spiral ring plate or a multi-turn diversion ring plate is arranged on the annular partition, and a heating coil is arranged between the multi-turn diversion ring plates or the diversion spiral ring plates. A conical umbrella plate is set above the reaction zone at the bottom of the kettle, and the melt falls along the conical umbrella plate to the wall of the kettle and then falls into the film. Compared with the existing multi-layer pre-condensation reactor with stirring, it not only simplifies the structure but also improves the reaction driving force, and increases the EG steaming interface, killing three birds with one stone. The central steam channel is cleverly designed as a cyclone separator to effectively remove the entrainment of steam mist from the kettle.
Description
technical field [0001] The invention relates to a polyester plant precondensation reactor, more specifically to a non-stirring multi-layer polyester precondensation reactor. technical background [0002] In the polyester production process, the pre-condensation stage requires the material to flow in a flat manner. The vacuum degree in the early stage is low to ensure complete esterification, and the vacuum degree in the later stage is high and has a large devolatilization area to facilitate the growth of molecular chains. For this reason, two reactors are usually connected in series in the precondensation stage. In recent years, German Zimmer, Swiss English Tower and China Textile Industry Design Institute have successively launched multi-layer precondensation kettles with stirring at the bottom of a single kettle. Stirring increases equipment manufacturing and operating costs, and is contrary to plug flow design principles. However, according to the conventional feeding a...
Claims
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IPC IPC(8): C08G63/78B01J3/00
Inventor 刘兆彦施景云史佳林赵玲方旭时文艺周元涂智贤
Owner BEIJING INNOVATION POLYMERIZATION TECH