Production device for petroleum ether chemical products

Abstract

The utility model relates to a production device of petroleum ether chemical products. A heavy component discharge pipe of a naphtha light separation tower structure is communicated with a feed port of a petroleum ether second-class refining tower structure through a light separation tower bottom pump and a solvent recovery tower bottom pump which are connected in parallel; a heavy component discharging pipe of the petroleum ether second-class refining tower structure is communicated with a feeding hole of the solvent regeneration tower structure through a petroleum ether second-class refining tower bottom pump, the petroleum ether second-class refining tower structure is used for producing second-class petroleum ether, and the solvent regeneration tower structure is used for producing third-class petroleum ether. According to the utility model, petroleum ether chemical products are produced by using naphtha, and the device has the characteristics of simple structure, stable product quality and low operation cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical equipment, and specifically relates to a production device for petroleum ether chemical products. Background Art

[0002] Naphtha (chemical light oil) is a major raw material in both the oil refining and petrochemical industries. It is a petroleum fraction obtained through primary or secondary processing with a dry point of less than 200°C. Secondary processing generally comes from catalytic cracking, hydrocracking, coking and other processes. Because domestic crude oil is generally heavy, its straight-run naphtha fraction content is very low, so making good use of secondary processed naphtha as a petrochemical raw material is a very important topic. The international community also attaches great importance to the deep processing of crude oil.

[0003] Petroleum ether is a light petroleum product and a mixture of low molecular weight hydrocarbons (mainly pentane and hexane). It is a colorless, transparent liquid with a kerosene smell.

[0004] The naphtha produced by the existing cycloalkane oil hydrogenation fractionation station is all sent to the naphtha storage tank, and the naphtha is not maximized. After analysis, the naphtha components vary greatly under different working conditions. It can be used as a raw material for producing petroleum ether Type II and petroleum ether Type III. Therefore, there is an urgent need for a device that uses naphtha as a raw material to produce petroleum ethers. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a production device for petroleum ether chemical products which has reasonable design, simple structure, improves naphtha utilization rate and reduces production cost.

[0006] The technical solution adopted to solve the above technical problems is: a production device for petroleum ether chemical products, the heavy component discharge pipe of the naphtha light component tower structure is connected with the feed port of the petroleum ether type II refining tower structure through the parallel light component tower bottom pump and the solvent recovery tower bottom pump, the heavy component discharge pipe of the petroleum ether type II refining tower structure is connected with the feed port of the solvent regeneration tower structure through the petroleum ether type II refining tower bottom pump, the petroleum ether type II refining tower structure produces petroleum ether type II, and the solvent regeneration tower structure produces petroleum ether type III.

[0007] As a preferred technical solution, the naphtha light fraction tower structure includes a light fraction tower, an air cooler at the top of the light fraction tower, a reflux tank at the top of the light fraction tower, a reflux pump at the top of the light fraction tower, and a reboiler for the light fraction tower. The light fraction tower reboiler and a heavy fraction discharge pipe are arranged at the bottom of the light fraction tower. The discharge pipe at the top of the light fraction tower is connected to the feed port of the air cooler at the top of the light fraction tower through a pipeline. The discharge port of the air cooler at the top of the light fraction tower is connected to the feed port of the reflux tank at the top of the light fraction tower through a pipeline. The discharge pipe of the reflux tank at the top of the light fraction tower is connected to the feed port of the reflux pump at the top of the light fraction tower through a pipeline. The discharge port of the reflux pump at the top of the light fraction tower is divided into two paths, one of which is connected to the reflux pipe at the top of the light fraction tower, and the other outputs mixed naphtha.

[0008] As a preferred technical solution, the petroleum ether type II refining tower structure includes a refining tower, a refining tower top air cooler, a refining tower top reflux tank, a refining tower top reflux pump, and a refining tower reboiler. A refining tower reboiler is provided at the bottom of the refining tower. The discharge port of the refining tower top air cooler is connected to the feed port of the refining tower top reflux tank through a pipeline. The discharge pipe of the refining tower top reflux tank is connected to the feed port of the refining tower top reflux pump through a pipeline. The discharge port of the refining tower top reflux pump is divided into two paths, one of which is connected to the reflux pipe at the top of the refining tower, and the other outputs petroleum ether type II.

[0009] As a preferred technical solution, the solvent regeneration tower structure includes a solvent regeneration tower, an air cooler at the top of the solvent regeneration tower, a reflux tank at the top of the solvent regeneration tower, a reflux pump at the top of the solvent regeneration tower, and a reboiler of the solvent regeneration tower. The solvent regeneration tower reboiler and the delivery pump are arranged in parallel on the discharge pipe at the bottom of the solvent regeneration tower. The discharge port of the air cooler at the top of the solvent regeneration tower is connected to the feed port of the reflux tank at the top of the solvent regeneration tower through a pipeline. The discharge pipe of the reflux tank at the top of the solvent regeneration tower is connected to the feed port of the reflux pump at the top of the solvent regeneration tower through a pipeline. The discharge port of the reflux pump at the top of the solvent regeneration tower is divided into two routes, one route is connected to the reflux pipe at the top of the solvent regeneration tower, and the other route outputs three types of petroleum ether.

[0010] The beneficial effects of the utility model are as follows:

[0011] The utility model realizes the production of petroleum ether chemical products by utilizing naphtha, and has the characteristics of high economic benefit, simple structure, stable product quality and low operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Among them: light fraction tower 1, light fraction tower top air cooler 2, light fraction tower top reflux tank 3, refining tower reboiler 4, refining tower 5, refining tower top air cooler 6, refining tower top reflux tank 7, refining tower top reflux pump 8, solvent regeneration tower top air cooler 9, solvent regeneration tower top reflux tank 10, solvent regeneration tower top reflux pump 11, delivery pump 12, solvent regeneration tower reboiler 13, solvent regeneration tower 14, petroleum ether type II refining tower bottom pump 15, light fraction tower top reflux pump 16, light fraction tower bottom pump 17, solvent recovery tower bottom pump 18, light fraction tower reboiler 19. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0015] exist Figure 1 In the embodiment, the production device of petroleum ether chemical products includes a naphtha light fraction tower structure, a petroleum ether type II refining tower structure, a solvent regeneration tower structure, a light fraction tower bottom pump 17, a solvent recovery tower bottom pump 18, and a petroleum ether type II refining tower bottom pump 15.

[0016] The heavy component discharge pipe of the naphtha light fraction tower structure is connected to the feed port of the petroleum ether type II refining tower structure through the parallel light fraction tower bottom pump 17 and the solvent recovery tower bottom pump 18. The naphtha light fraction tower structure separates other heavy components, which are transported to the petroleum ether type II refining tower structure by the light fraction tower bottom pump 17 and the solvent recovery tower bottom pump 18. The solvent recovery tower bottom pump 18 delivers the bottom oil of the light fraction tower 1 to the refining tower 5. The heavy component discharge pipe of the petroleum ether type II refining tower structure is connected to the feed port of the solvent regeneration tower structure through the petroleum ether type II refining tower bottom pump 15. The petroleum ether type II refining tower structure produces petroleum ether type II, and the solvent regeneration tower structure produces petroleum ether type III.

[0017] The naphtha light fraction tower structure of the present embodiment comprises a light fraction tower 1, an air cooler 2 at the top of the light fraction tower, a reflux tank 3 at the top of the light fraction tower, a reflux pump 16 at the top of the light fraction tower, and a reboiler 19 for the light fraction tower. The light fraction tower reboiler 19 and a discharge pipe for the heavy fraction are installed at the bottom of the light fraction tower 1. The discharge pipe at the top of the light fraction tower 1 is connected to the feed port of the air cooler 2 at the top of the light fraction tower through a pipeline, the discharge port of the air cooler 2 at the top of the light fraction tower is connected to the feed port of the reflux tank 3 at the top of the light fraction tower through a pipeline, the discharge pipe of the reflux tank 3 at the top of the light fraction tower is connected to the feed port of the reflux pump 16 at the top of the light fraction tower through a pipeline, and the discharge port of the reflux pump 16 at the top of the light fraction tower is divided into two paths, one path is connected to the reflux pipe at the top of the light fraction tower, and the other path outputs the mixed naphtha to the naphtha storage tank.

[0018] The petroleum ether type II refining tower structure of the present embodiment includes a refining tower 5, a refining tower top air cooler 6, a refining tower top reflux tank 7, a refining tower top reflux pump 8, and a refining tower reboiler 4. The refining tower 5 is provided with a refining tower reboiler 4 at the bottom. The discharge port of the refining tower top air cooler 6 is connected to the feed port of the refining tower top reflux tank 7 through a pipeline. The discharge pipe of the refining tower top reflux tank 7 is connected to the feed port of the refining tower top reflux pump 8 through a pipeline. The discharge port of the refining tower top reflux pump 8 is divided into two paths, one of which is connected to the reflux pipe at the top of the refining tower 5, and the other is used to output the petroleum ether type II.

[0019] The solvent regeneration tower structure of the present embodiment includes a solvent regeneration tower 14, a solvent regeneration tower top air cooler 9, a solvent regeneration tower top reflux tank 10, a solvent regeneration tower top reflux pump 11, and a solvent regeneration tower reboiler 13. The solvent regeneration tower reboiler 13 and a delivery pump 12 are arranged in parallel on the discharge pipe at the bottom of the solvent regeneration tower 14. The delivery pump 12 delivers the residual oil product at the bottom of the solvent regeneration tower 14 to the tank area as mixed naphtha. The discharge port of the solvent regeneration tower top air cooler 9 is connected to the feed port of the solvent regeneration tower top reflux tank 10 through a pipeline. The discharge pipe of the solvent regeneration tower top reflux tank 10 is connected to the feed port of the solvent regeneration tower top reflux pump 11 through a pipeline. The discharge port of the solvent regeneration tower top reflux pump 11 is divided into two paths, one path is connected to the reflux pipe at the top of the solvent regeneration tower, and the other path outputs three types of petroleum ether.

[0020] The working principle of the utility model is as follows:

[0021] The naphtha produced by the cycloalkane oil hydrogenation fractionation station is distilled through the light fraction tower 1, the refining tower 5 and the solvent regeneration tower 14, and the light components in the naphtha are extracted from the top of the light fraction tower 1, the petroleum ether type II product is extracted from the top of the refining tower 5, the petroleum ether type III product is extracted from the top of the solvent regeneration tower 14, and the heavy components at the bottom of the solvent regeneration tower 14 are sent out as mixed naphtha products.

[0022] The economic benefits of the utility model during the trial operation are as follows:

[0023]

[0024] It can be seen that the utility model produces huge economic benefits and can be widely promoted and used.

Claims

1. A production device for petroleum ether chemical products, characterized in that: The recombinant fraction discharge pipe of the naphtha light fraction tower structure is connected to the feed port of the petroleum ether type II refining tower structure through a light fraction tower bottom pump (17) and a solvent recovery tower bottom pump (18) connected in parallel. The recombinant fraction discharge pipe of the petroleum ether type II refining tower structure is connected to the feed port of the solvent regeneration tower structure through a petroleum ether type II refining tower bottom pump (15). The petroleum ether type II refining tower structure produces petroleum ether type II, and the solvent regeneration tower structure produces petroleum ether type III.

2. The production device of petroleum ether chemical products according to claim 1, characterized in that: The naphtha light fraction tower structure comprises a light fraction tower, an air cooler (2) at the top of the light fraction tower, a reflux tank (3) at the top of the light fraction tower, a reflux pump (16) at the top of the light fraction tower, and a reboiler (19) at the top of the light fraction tower. The light fraction tower reboiler (19) and a heavy fraction discharge pipe are arranged at the bottom of the light fraction tower (1). The light fraction tower top discharge pipe is connected to the feed port of the air cooler (2) at the top of the light fraction tower through a pipeline. The discharge port of the air cooler (2) at the top of the light fraction tower is connected to the feed port of the reflux tank (3) at the top of the light fraction tower through a pipeline. The discharge pipe of the reflux tank (3) at the top of the light fraction tower is connected to the feed port of the reflux pump (16) at the top of the light fraction tower through a pipeline. The discharge port of the reflux pump (16) at the top of the light fraction tower is divided into two paths, one of which is connected to the reflux pipe at the top of the light fraction tower, and the other of which outputs mixed naphtha.

3. The production device of petroleum ether chemical products according to claim 1, characterized in that: The petroleum ether type II refining tower structure comprises a refining tower (5), a refining tower top air cooler (6), a refining tower top reflux tank (7), a refining tower top reflux pump (8), and a refining tower reboiler (4). The refining tower (5) is provided with a refining tower reboiler (4) at the bottom. The discharge port of the refining tower top air cooler (6) is connected to the feed port of the refining tower top reflux tank (7) through a pipeline. The discharge pipe of the refining tower top reflux tank (7) is connected to the feed port of the refining tower top reflux pump (8) through a pipeline. The discharge port of the refining tower top reflux pump (8) is divided into two paths, one of which is connected to the reflux pipe at the top of the refining tower, and the other is used to output the petroleum ether type II.

4. The production device of petroleum ether chemical products according to claim 1, characterized in that: The solvent regeneration tower structure comprises a solvent regeneration tower, an air cooler at the top of the solvent regeneration tower, a reflux tank (10) at the top of the solvent regeneration tower, a reflux pump (11) at the top of the solvent regeneration tower, and a reboiler (13) at the top of the solvent regeneration tower. The reboiler (13) and a delivery pump (12) are arranged in parallel on the discharge pipe at the bottom of the solvent regeneration tower. The discharge port of the air cooler at the top of the solvent regeneration tower is connected to the feed port of the reflux tank (10) at the top of the solvent regeneration tower through a pipeline. The discharge pipe of the reflux tank (10) at the top of the solvent regeneration tower is connected to the feed port of the reflux pump (11) at the top of the solvent regeneration tower through a pipeline. The discharge port of the reflux pump (11) at the top of the solvent regeneration tower is divided into two paths, one of which is connected to the reflux pipe at the top of the solvent regeneration tower, and the other outputs three types of petroleum ether.

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