Quick cooling equipment for rapid reducing temperature of product from hydrotreating reaction of catalytic cracking gasoline

Abstract

This invention discloses equipment for rapidly cooling hydrogenation products of catalytic cracking gasoline. The equipment can rapidly lower the temperature of hot flow medium, and can control the entrance temperature of the next reactor. The equipment is composed of a rapid cooler, a quenching oil tank, a temperature reducer, a quenching oil pump and corresponding control valves. The quenching oil tank is connected with a stable gasoline pipe via a liquid level control valve, and sends gasoline via the quenching oil pump through three ways. The first way of gasoline flows to the temperature reducer through a flow control valve, and enters the rapid cooler through a Y-shaped temperature control valve. A high-temperature reaction product pipe is connected with the rapid cooler and Y-shaped temperature control valve. A raw material pipe is connected with the rapid cooler. The second way of gasoline flows to the quenching oil tank through a pressure control valve. The third way of gasoline flows to the reactor of the equipment as the quenching oil. The equipment ca rapidly cool the products of high-temperature reactions and prevent further reaction of H2S into sulfide thiophene (difficult to remove) at high temperatured and without the catalyst.

Description

Technical field:

[0001] The patented technology relates to a quenching device for rapidly reducing the temperature of catalytic cracking gasoline hydrogenation reaction products, and can rapidly reduce the inlet temperature of the lower stage reactor. Background technique:

[0002] At present, in the catalytic cracking gasoline hydro-upgrading unit, the temperature reduction of the reaction product is carried out by exchanging heat with the cold flow material through an ordinary heat exchanger. Since the use of ordinary heat exchangers requires a certain residence time, which is not conducive to the rapid cooling of high-temperature reaction products, and it is difficult to control when the reactor is overheated, so we have developed a quenching device that can quickly cool high-temperature reaction products. The rapid cooling process can prevent the hydrogen sulfide generated by the reaction from reacting again under the condition of high temperature and separation from the...

Examples

Embodiment Construction

[0013] Taking the 200,000 tons / year catalytic cracking gasoline hydro-upgrading unit as an example, the description is as follows:

[0014] Under normal production conditions, in Figure 1, the high-temperature reaction product (430°C, 2.5MPa, 58800kg / h) undergoes heat exchange with the raw material gasoline (40°C, 2.9MPa, 12500kg / h) through the reaction product quencher (1), and rapidly After cooling to below 300°C, the temperature of the medium after heat exchange is adjusted through the three-way regulating valve (2).

[0015] When the reactor is overheated, the temperature of the reaction product can reach 460°C, and the temperature after heat exchange is 330°C. At this time, the temperature of the reactor and the high-temperature reaction product is lowered by means of quenching oil.

[0016] Stable gasoline (40°C, 0.85MPa, 20000kg / h) is sent to the quenching oil tank (4) as quenching oil through the liquid level control valve (3) to depressurize to 0.3MPa, and is sent out...

Technical field:

[0001] The patented technology relates to a quenching device for rapidly reducing the temperature of catalytic cracking gasoline hydrogenation reaction products, and can rapidly reduce the inlet temperature of the lower stage reactor. Background technique:

[0002] At present, in the catalytic cracking gasoline hydro-upgrading unit, the temperature reduction of the reaction product is carried out by exchanging heat with the cold flow material through an ordinary heat exchanger. Since the use of ordinary heat exchangers requires a certain residence time, which is not conducive to the rapid cooling of high-temperature reaction products, and it is difficult to control when the reactor is overheated, so we have developed a quenching device that can quickly cool high-temperature reaction products. The rapid cooling process can prevent the hydrogen sulfide generated by the reaction from reacting again under the condition of high temperature and separation from the...

Examples

Embodiment Construction

[0013] Taking the 200,000 tons / year catalytic cracking gasoline hydro-upgrading unit as an example, the description is as follows:

[0014] Under normal production conditions, in Figure 1, the high-temperature reaction product (430°C, 2.5MPa, 58800kg / h) undergoes heat exchange with the raw material gasoline (40°C, 2.9MPa, 12500kg / h) through the reaction product quencher (1), and rapidly After cooling to below 300°C, the temperature of the medium after heat exchange is adjusted through the three-way regulating valve (2).

[0015] When the reactor is overheated, the temperature of the reaction product can reach 460°C, and the temperature after heat exchange is 330°C. At this time, the temperature of the reactor and the high-temperature reaction product is lowered by means of quenching oil.

[0016] Stable gasoline (40°C, 0.85MPa, 20000kg / h) is sent to the quenching oil tank (4) as quenching oil through the liquid level control valve (3) to depressurize to 0.3MPa, and is sent out...

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