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Zhongyuan Ethylene plant operation with high load and Countermeasures

Ethane is designed to 9.5t / h, while the actual was only 3t / h, resulting in a 112 EA reduced condensation of propylene, FA can not make up a 502 acrylamide caused by their lack of empty cans. Comprehensive analysis, resulting in a 502 tank FA effusion main reason for the difficulty: ① EA can not cool down enough for a 112 propylene; ② Propylene Refrigeration Compressor in a suction tank 503 FA to FA is not enough of a transmission capacity of 502; ③ Production the load is too large. 2.2.2 Solution Received: 0D-lO-l6, such as Henan Chemical Canada 2001 3 Based on the above analysis, 2O (] O in March,[link widoczny dla zalogowanych], we are bottom of the tank from the FA to the FA for a 503 a 502 tank bottom increased ~ Provisional lines to increase the FA to the FA for a 503 a 502 transmission capacity of liquid propylene, the FA 502 to meet a case of the user needs to maintain the normal level to ensure that the ethylene plant of high-load operation. 2. 3, a 201 GB cracking gas compressor suction pressure is high because Zhongyuan Ethylene 2.3.1 As no methane compressor, a part of cracked gas compressor cooling tasks undertaken, which part of the mission is by cooling the system from the isolated cryogenic The C. / loop back to a 201 GB achieved a suction tank. Meanwhile Cl / cycle the amount of increase or decrease the load on the 201 GB and a section of a suction pressure of great influence, because the Q / c: recyclable materials primarily for methane, molecular weight is small,[link widoczny dla zalogowanych], so a suction pressure of 201 GB a great impact. caused a 201 GB main reasons for the high suction pressure: ① Large Cracking the total feeding amount,[link widoczny dla zalogowanych], resulting in high plant load, because the original design of a cracking furnace for the four open equipment, now five furnace operation, improve the plant load, resulting in a 201 GB high suction pressure. ② c / recycling volume, resulting in 201 GB a suction pressure is high. As the five furnace operation, plant load increases, the cooling system from the deep to a 201 GB C. / circulation rate of natural increase, resulting in a 201 GB suction pressure increases. 2.3.2 a 201 GB solution to reduce the pressure from the reduction of inhaled Cl / Circulation of staff. by cryogenic system flow analysis, we propose a modified program (see Figure 1),[link widoczny dla zalogowanych], and 2 off the methane separation tower 305 and 3 FA off a methane separation tower 306 FA tank bottom of a liquid material composition analysis, analysis data and operating temperature and pressure in Table 2. from the FA as part of a liquid material 306 to the bottom of the separation of methane off the tower (see Figure 1, dashed line), a decrease cl / G loop, while a deep-j 134 ℃ Figure 1 Xin system reform process Figure 21 cylinder cooling capacity of the material can also be recovered DA a 301 tower. to take this technology before and after the process changes in Table 3. wrapped 2FA305, E306 ■ composition of the ink feed deer sleeve operating temperature, pressure, discharge the bottom of the hard I'A306 3,177.2616.772.360.08-1343215F30s Tang Department of discharging 1.94341748.0913.411.30-983240 I wrapped three cryogenic system technical efficiency Xu Cao situation after the process high viscosity of quench oil 2.4 2.4.1 the reasons for the causes and solutions to run from the five furnace since the quench oil system has always existed the problem of high viscosity of quench oil, serious problems with high load ethylene production,[link widoczny dla zalogowanych], resulting in acute ling reasons for the high oil viscosity are: ① Less 103, towers can not stick a DA put into use, resulting in light components into the fuel oil, causing acute and carry the oil viscosity is high; ② load is too large ethylene plant, a 101 gasoline fractionator DA overload, the amount of light component to the bottom less, causing increased viscosity of quench oil; ③ EA is easy for a 138 block, resulting in 101 towers in the back of a DA deficiency, which led to increased viscosity of quench oil. 2.4.2 Solution for quench oil viscosity is high, we increase the Central return to light components into the tower tank, take the following steps: ① a 138 entry in EA added a 3 | f quench oil line; ② increase in EA 138, a complement of a line and a line of gasoline; ③ diesel the diesel tank to lOt / h flow into the tower reactor; ④ reduce dilution steam pressure from 675kPa down 5OOkPa, so much in the recovery from the heat quench oil, thereby reducing the DA a bottom temperature of 101. As a result of these measures so that viscosity of quench oil has been effectively controlled, in general, quench oil viscosity can be controlled in 2O0O between a 3000a $ t. 3 Conclusion Zhongyuan Ethylene solution to the problem of high load operation to fully tap the potential of existing devices, so that ethylene production increasing 576 ?, reduce the cost of 156.8 yuan tons of ethylene, ethylene tons of standard oil to reduce energy consumption 36.1kg, she effectively improve the economic efficiency of enterprises, Zhongyuan Ethylene 2OOO Bin loss of more than 120 million yuan in 1999.
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