A light ends column feed system for an isooctane unit

Abstract

The utility model discloses a kind of light hydrocarbon removal column feed systems applied to iso-octane device, it is related to light hydrocarbon removal column feed system technical field, comprising: delivery pump, with input and output, its input is connected in raw material carbon four self tank area;Flow valve, is connected on the output of the delivery pump by pipeline one;Three-way valve, its input is connected with the pipeline one, its output is respectively connected with pipeline two and pipeline three;Buffer tank, is connected on the pipeline three;Raw material coalescer, is connected with the pipeline two by pipeline four;Feed pump, its input is connected with the buffer tank by pipeline five, its output is connected with the pipeline four by pipeline six. By setting three-way valve and pipeline two, the conveying route of raw material carbon four self tank area is switched into two passages, can effectively reduce the operation monitoring point and operation power consumption in the process of conveying raw material from raw material carbon four self tank area to light hydrocarbon removal column, effectively reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of light hydrocarbon removal tower feeding technology, specifically to a light hydrocarbon removal tower feeding system applied to isooctane units. Background Technology

[0002] With increasingly stringent environmental regulations, higher requirements have been placed on the olefin content of automotive gasoline. Industrial isooctane is the ideal blending component for producing clean, high-octane gasoline. Currently, there are two methods for isooctane synthesis: one is the indirect alkylation of isobutene dimerization via hydrogenation, and the other is the direct alkylation of isobutane and butene. The direct alkylation process can be divided into three types depending on the type of catalyst used in the reaction. Industrially, the liquid acid alkylation process of isobutane and butene is commonly used to prepare isooctane, and this process mainly includes a feedstock processing system, a reaction system, a refrigeration system, an effluent treatment system, a separation system, and an acid-base system.

[0003] The prior art publication number CN111533631A discloses an industrial isooctane production system, which consists of a raw material pretreatment unit, a reaction unit, a refrigeration and compression unit, a refining and fractionation unit, and a chemical treatment unit. The raw material pretreatment unit includes a feed buffer tank (V-6101), which is connected to a light hydrocarbon removal tower (T-6010) via a feed pump (P-6101A / B). The process flow is relatively complex, increasing the number of operation monitoring points and operating power consumption, which is not conducive to reducing costs. Therefore, this application proposes a light hydrocarbon removal tower feeding system for isooctane plants. Utility Model Content

[0004] The purpose of this invention is to propose a feed system for the light hydrocarbon removal tower in an isooctane unit, aiming to solve the problem that the above-mentioned process is relatively complex, increasing the number of operation monitoring points and operating power consumption, which is not conducive to cost reduction.

[0005] This utility model provides a feed system for a light hydrocarbon removal tower in an isooctane unit, comprising: The transfer pump has an input end and an output end, with its input end connected to the raw material C4 tank area; The flow valve is connected to the output end of the delivery pump via a pipeline. The three-way valve has its inlet connected to pipe one and its outlet connected to pipe two and pipe three respectively. Buffer tank, connected to pipe line three; The raw material coalescer is connected to pipe two via pipe four. The feed pump has its input end connected to the buffer tank via pipe five, and its output end connected to pipe four via pipe six.

[0006] It also includes pipeline seven, which connects the isobutane C4 inlet / outlet tank area and pipeline one.

[0007] Preferably, the flow valve includes a flow meter and a flow control valve, with the flow meter located upstream of the flow control valve.

[0008] Preferably, a gate valve is also installed on pipeline two. A figure-eight blind flange is also installed on pipeline two. A flow valve is installed on pipeline four. The three-way valve is an equal-diameter three-way valve or a reducing three-way valve.

[0009] Compared with existing technologies, it has the following beneficial effects: This invention, by setting a three-way valve and a second pipeline, switches the transport route of raw material C4 from the tank area into two paths, which can effectively reduce the number of operation monitoring points and power consumption in the process of transporting raw material from the raw material C4 from the tank area to the light hydrocarbon removal tower, and effectively reduce operating costs. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This invention relates to a process flow diagram of a feed system for a light hydrocarbon removal tower in an isooctane unit. Figure 1 ; Figure 2 This invention relates to a process flow diagram of a feed system for a light hydrocarbon removal tower in an isooctane unit. Figure 2 .

[0012] In the diagram, 1 represents the raw material C4 tank area; 2-Flow valve; 3-Three-way valve; 4-Buffer tank; 5-Raw material coalescer; 6-Feed pump; 7-Pipeline 1; 8-Pipeline 2; 9-Pipeline 3; 10-Pipeline 4; 11-Pipeline 5; 12-Pipeline 6; 13-Pipeline 7. Detailed Implementation

[0013] To better understand the structure, functional features, and advantages of this utility model, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings: Example: like Figure 1 and Figure 2As shown, this utility model provides a feed system for a light hydrocarbon removal tower in an isooctane unit, comprising: A transfer pump has an input end and an output end, the input end of which is connected to the raw material C4 tank area 1; Flow valve 2 is connected to the output end of the delivery pump via pipeline 7; The three-way valve 3 has its inlet end connected to pipe 7 and its outlet end connected to pipe 8 and pipe 9 respectively. Buffer tank 4 is connected to pipe 3 9; The raw material coalescer 5 is connected to the pipeline 8 via pipeline 4 10.

[0014] The feed pump 6 has its input end connected to the buffer tank 4 via pipe 5 11, and its output end connected to pipe 4 10 via pipe 6 12.

[0015] It also includes pipeline 713, which connects the isobutane C4 inlet / outlet tank area and pipeline 17, so that the isobutane-rich material from the tank area enters the raw material buffer tank 4 under the control of the flow display and flow regulating valve.

[0016] See Figure 1 and Figure 2 Flow valve 2 includes a flow meter with metering display and accumulation functions, and a flow control valve consisting of the flow meter and a regulating valve forming an automatic control loop. The regulating valve automatically adjusts its opening according to the flow setpoint. The flow meter is located upstream of the flow control valve. See also... Figure 2 Pipeline 28 is also equipped with a gate valve for closing and opening pipeline 28.

[0017] See Figure 1 and Figure 2 Pipeline 28 is also equipped with a figure-eight blind flange to switch the flow between two states: flow and blockage.

[0018] See Figure 1 and Figure 2 A flow valve 2 is installed on pipeline 410. The flow valve 2 includes a flow meter with metering display and accumulation functions, and a flow control valve that consists of an automatic control loop composed of the flow meter and a regulating valve.

[0019] See Figure 1 and Figure 2 The three-way valve 3 is a DN150 equal diameter three-way valve 3 or a DN150X100 reducing three-way valve 3.

[0020] The working principle of this application is as follows: Raw material C4 is transported from tank area 1 to pipeline 7 via a transfer pump to three-way valve 3. Three-way valve 3 switches to pipeline 8 so that the raw material enters pipeline 10 via pipeline 8 and then enters raw material coalescer 5. Isobutane C4 entering and leaving the tank area enters pipeline 7 via pipeline 13, then switches to pipeline 9 via three-way valve 3 to enter buffer tank 4, then enters feed pump 6 via pipeline 11, and is transported to pipeline 10 via pipeline 12, and finally enters raw material coalescer 5.

[0021] The three-way valve 3 of this utility model can switch the conveying path of raw material C4 from tank area 1. It can be directly connected to pipeline 4 10 through pipeline 2 8, or it can enter the raw material buffer tank 4 through pipeline 3 9 and then be conveyed to pipeline 4 10 through feed pump 6, so as to realize multi-path control and effectively ensure that when any path has a problem, the other path will operate normally, effectively reducing the downtime caused by path failure.

[0022] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A feed system for a light hydrocarbon removal tower in an isooctane unit, characterized in that, include: The transfer pump has an input end and an output end, the input end of which is connected to the raw material C4 tank area (1). The flow valve (2) is connected to the output end of the delivery pump via pipeline (7); The three-way valve (3) has its input end connected to the first pipeline (7) and its output end connected to the second pipeline (8) and the third pipeline (9) respectively. Buffer tank (4) is connected to the pipeline three (9); The raw material coalescer (5) is connected to the pipeline (8) via pipeline four (10); The feed pump (6) has its input end connected to the buffer tank (4) via pipeline five (11), and its output end connected to pipeline four (10) via pipeline six (12).

2. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, The flow valve (2) includes a flow meter and a flow control valve, with the flow meter located at the front end of the flow control valve.

3. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, A gate valve is also installed on the second pipeline (8).

4. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, The second (8) pipe is also equipped with a figure-eight blind flange.

5. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, The flow valve (2) is installed on the pipeline (10).

6. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, The three-way valve (3) is an equal-diameter three-way valve (3) or a different-diameter three-way valve (3).

7. The feed system for the light hydrocarbon removal tower in an isooctane unit according to claim 1, characterized in that, It also includes pipeline seven (13), which connects the isobutane C4 inlet / outlet tank area and pipeline one (7).

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