Temperature control method of mother liquor pipeline conveying of slurry method HDPE apparatus
A temperature control method and pipeline transportation technology, which can be used in auxiliary non-electrical temperature control and other directions, can solve the problems of uneven thermal temperature distribution of oligomers, easy precipitation, and blocked pipelines, so as to improve the effective working time and save cleaning costs. , the effect of reducing economic losses
Active Publication Date: 2009-05-27
SINOPEC YANGZI PETROCHEM
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Problems solved by technology
Solve the problem that the uneven temperature distribution of the original winding pipe heating makes oligomers easy to precipitate and deposit on the inner wall of the pipe to block the pipe
Method used
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[0015] 1. Remove the original winding tube on the original mother liquor pipeline (see figure 1 ),
[0016] Jacketed pipe is added to the mother liquid pipeline (such as figure 2 Shown), of course, the external insulation layer of the hot water pipe is still needed. The hot water inlet and outlet of the jacketed tube side are respectively connected to the inlet and outlet of the hot water tank, and the hot water in the tube side is circulated and controlled by the pressure of the pump or the height difference pressure; generally, a temperature control system for the hot water tank and a control system for the pressure pump are provided , set a temperature sensor to make the temperature of the hot water tank 1-5°C higher than the hot water temperature of the tube side; and set another temperature sensor on the hot water tube side, when the temperature is only 60°C or slightly higher, the hot water circulating pump Work; figure 2 The hot water in the tank comes from the hot...
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The invention relates to a method for controlling the temperature of conveying through a mother liquor pipeline of a slurry process HDPE device. The mother liquor conveying pipeline of the slurry process HDPE device is provided with a hot water jacket tube side and a temperature control hot water tank which is connected with the hot water jacket tube side and is used for controlling the hot water temperature of the tube side to between 60 and 70 DEG C, and the temperature of the hot water tank is controlled to be slightly higher than the hot water temperature of the hot water jacket tube side. The method finds the shortages of a heat preservation proposal for a winding pipe of the prior mother liquor pipeline, changes the phenomenon that the temperature distribution of the heat preservation of the winding pipe of the prior mother liquor pipeline is uneven, ensures that the integral temperature of the pipeline is more than 60 DEG C, and has small fluctuation for controlling the temperature; besides, the method greatly prolongs the operation cycle of the mother liquor pipeline in the process of producing a few special materials from the prior 15 days to 2 months, saves the cost for cleaning the pipeline, improves the effective working hours for equipment, and greatly improves the production efficiency.
Description
1. Technical field [0001] The invention relates to temperature control in the transportation process, in particular to a temperature control method for mother liquid pipeline transportation in the polymer polymerization process. 2. Background technology [0002] The slurry method high-density polyethylene (HDPE) plant is the HDPE production plant of the applicant and its peers. Each production line is designed to produce up to 70,000 tons of HDPE natural color pellets per year. The main part of the plant can be composed of three production lines, each of which produces The capacity is 70,000 tons / year. Each line has two polymerization tanks with the same structure and volume. The two tanks can form three production modes of parallel A, parallel B and series according to the different production processes and the requirements of process operating conditions, and produce extrusion molding, blow molding and injection molding. Three types of products. The technical route of th...
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Inventor 殷大斌陈卫东朱宇飞
Owner SINOPEC YANGZI PETROCHEM