Automatic control method and application of front-end depropanization front-end hydrogenation reactor

Abstract

The invention discloses an automatic control method and application of a front-end depropanization front-end hydrogenation reactor. The automatic control method of the front-end depropanization front-end hydrogenation reactor comprises the following steps: obtaining analysis data based on obtained parameters of the front-end depropanization front-end hydrogenation reactor; operating parameters are adjusted, so that the inlet CO volume content is in a stable state; judging whether the volume content of acetylene at the outlet is smaller than a set value omegappm or not, and adjusting the inlet temperature based on the judgment result of the volume content of acetylene; and judging whether the conversion rates of the methylacetylene and the propadiene in the front hydrogenation reactor are within a set range or not, and adjusting the inlet temperature of the front hydrogenation reactor based on the judgment result of the conversion rates of the methylacetylene and the propadiene. According to the method, the inlet temperature is adjusted based on the volume content of acetylene and the conversion rate of methylacetylene and propadiene at the same time, so that the aim of obtaining the optimal ethylene yield is achieved while the volume content of acetylene at an outlet is ensured to be qualified.

Description

technical field

[0001] The invention belongs to the field of petrochemical industry, and more specifically relates to an automatic control method and application of a pre-depropanization pre-hydrogenation reactor. Background technique

[0002] Ethylene technology is the leading technology in petrochemical industry, and the level of ethylene technology is regarded as an important symbol to measure the development level of a country's petrochemical industry. The trienes (ethylene, propylene, butadiene) produced by the ethylene cracking unit are the basic raw materials of the petrochemical industry, and the production of trienes is the main symbol to measure the development level of a country's petrochemical industry.

[0003] After steam cracking and separation of liquid hydrocarbon raw materials such as naphtha in the ethylene cracking unit, the carbon distillate contains ethylene, ethane, and a small amount of acetylene, and the content of acetylene is about 0.5% to 3% (volu...

Examples

Embodiment 1

[0056] Such as figure 1 Shown, the automatic control method of hydrogenation reactor before a kind of front depropanization, comprises:

[0057] Step S101: Obtain analysis data based on the obtained parameters of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed;

[0058] Optionally, the obtained parameters of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed include:

[0059] Inlet temperature of hydrogenation reactor before depropanization before single bed or last bed, pressure of hydrogenation reactor before depropanization before single bed or last bed, hydrogenation reactor before depropanization before single bed or last bed Inlet material flow rate, acetylene concentration at the inlet of hydrogenation reactor before depropanization before single-stage bed or final bed, acetylene concentration at outlet of hydrogenation reactor before depropanization before single-stage b...

Embodiment 2

[0122] The cracked gas refining hydrogenation removal process in the separation process of the ethylene cracking unit is used to remove acetylene or / and MAPD. The control method in the example is used. The separation process is the pre-depropanization and pre-hydrogenation process.

[0123] In the cracked gas refining hydrogenation removal process of the separation process of the ethylene cracking unit, the devices include:

[0124] A hydrogenation reactor before depropanization before the single-stage bed or the last-stage bed, and the hydrogenation reactor before the depropanization before the single-stage bed or the last-stage bed is an adiabatic bed or an isothermal bed.

[0125] The composition of the inlet material of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed includes CO, hydrogen, methane, ethylene, ethane, acetylene, propylene, propane and MAPD;

[0126] It also includes at least one of C4 fraction and C5+ fracti...

technical field

[0001] The invention belongs to the field of petrochemical industry, and more specifically relates to an automatic control method and application of a pre-depropanization pre-hydrogenation reactor. Background technique

[0002] Ethylene technology is the leading technology in petrochemical industry, and the level of ethylene technology is regarded as an important symbol to measure the development level of a country's petrochemical industry. The trienes (ethylene, propylene, butadiene) produced by the ethylene cracking unit are the basic raw materials of the petrochemical industry, and the production of trienes is the main symbol to measure the development level of a country's petrochemical industry.

[0003] After steam cracking and separation of liquid hydrocarbon raw materials such as naphtha in the ethylene cracking unit, the carbon distillate contains ethylene, ethane, and a small amount of acetylene, and the content of acetylene is about 0.5% to 3% (volu...

Examples

Embodiment 1

[0056] Such as figure 1 Shown, the automatic control method of hydrogenation reactor before a kind of front depropanization, comprises:

[0057] Step S101: Obtain analysis data based on the obtained parameters of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed;

[0058] Optionally, the obtained parameters of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed include:

[0059] Inlet temperature of hydrogenation reactor before depropanization before single bed or last bed, pressure of hydrogenation reactor before depropanization before single bed or last bed, hydrogenation reactor before depropanization before single bed or last bed Inlet material flow rate, acetylene concentration at the inlet of hydrogenation reactor before depropanization before single-stage bed or final bed, acetylene concentration at outlet of hydrogenation reactor before depropanization before single-stage b...

Embodiment 2

[0122] The cracked gas refining hydrogenation removal process in the separation process of the ethylene cracking unit is used to remove acetylene or / and MAPD. The control method in the example is used. The separation process is the pre-depropanization and pre-hydrogenation process.

[0123] In the cracked gas refining hydrogenation removal process of the separation process of the ethylene cracking unit, the devices include:

[0124] A hydrogenation reactor before depropanization before the single-stage bed or the last-stage bed, and the hydrogenation reactor before the depropanization before the single-stage bed or the last-stage bed is an adiabatic bed or an isothermal bed.

[0125] The composition of the inlet material of the hydrogenation reactor before the depropanization of the single-stage bed or the last-stage bed includes CO, hydrogen, methane, ethylene, ethane, acetylene, propylene, propane and MAPD;

[0126] It also includes at least one of C4 fraction and C5+ fracti...

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