Raw oil feeding heat exchange device for coal-based rectification device

Abstract

The utility model discloses a raw oil feeding heat exchange device for a coal-based rectification device, which comprises a box body, a plurality of upper heat exchange shells and lower heat exchange shells which are arranged in a staggered manner are arranged in the box body at intervals, and heat exchange media circulate in the upper heat exchange shells and the lower heat exchange shells. The multiple upper heat exchange shells, the multiple lower heat exchange shells and the inner wall of the box body define an inflection type flow channel, and the two opposite side walls of the box body communicate with a raw oil feeding pipe and a raw oil discharging pipe correspondingly; a plurality of first heat conduction fins are symmetrically arranged on two back side plates of the upper heat exchange shell, a plurality of second heat conduction fins are symmetrically arranged on two back side plates of the lower heat exchange shell, and the first heat conduction fins and the second heat conduction fins between the adjacent upper heat exchange shell and the lower heat exchange shell are arranged in a vertically spaced and staggered mode. The circulating time of raw oil in the box body is prolonged on the whole, so that the raw oil can be in full contact with the upper heat exchange shell and the lower heat exchange shell, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a raw oil feed heat exchange device for a coal-based distillation device. Background Art

[0002] Coal-to-liquids contain a large amount of high-value-added chemicals and are rare special chemical products.

[0003] In the coal-based distillation process, raw oil (stable light hydrocarbons) comes from the raw material tank, is pressurized by the raw oil pump, and then preheated before entering the first fractionation tower. The oil and gas at the top of the first fractionation tower are condensed and cooled by the tower top air cooler before entering the tower top reflux tank and being separated into tower top gas and tower top light oil. The tower top gas is discharged to the non-condensable gas vent tank under pressure. The liquid is pressurized by the tower top reflux pump, and part of it is sent to the tank area as product (butane), and the other part is used as tower top reflux. The bottom material enters the second fractionation tower under its own pressure... Through repeated secondary distillation and continuous circulation, different products are obtained. The raw oil is pressurized and preheated by the raw oil pump before entering the first fractionation tower. The preheating equipment usually uses a shell and tube heat exchanger, that is, multiple heat exchange tubes are arranged in the tube body, and the heat exchange medium flows through the heat exchange tubes for heat exchange. The shell and tube heat exchanger has a limited contact area between the raw oil and the heat exchange tubes, and the heat exchange efficiency is not high. In order to achieve the heat exchange effect, the shell and tube heat exchanger has large specifications and occupies a large area. The performance is average and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a raw oil feed heat exchange device for a coal-based distillation device, which generally prolongs the circulation time of the raw oil in the box, enables it to fully contact with the upper heat exchange shell and the lower heat exchange shell, improves the heat exchange efficiency, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a raw oil feed heat exchange device for a coal-based distillation device, comprising a box body, wherein the internal intervals of the box body are provided with a plurality of staggered upper heat exchange shells and lower heat exchange shells, heat exchange medium circulates in the upper heat exchange shells and the lower heat exchange shells, and the plurality of upper heat exchange shells and the lower heat exchange shells and the inner wall of the box body form a folded flow channel, and the two opposite side walls of the box body are respectively connected to a raw oil feed pipe and a raw oil discharge pipe; the two-phase back side plates of the upper heat exchange shell are symmetrically provided with a plurality of heat-conducting fins 1, and the two-phase back side plates of the lower heat exchange shell are symmetrically provided with a plurality of heat-conducting fins 2, and the heat-conducting fins 1 and the heat-conducting fins 2 between adjacent upper heat exchange shells and lower heat exchange shells are staggered in the upper and lower directions.

[0006] Preferably, the upper end of the upper heat exchange shell is fixedly connected to the top of the box body, and a gap is left between the lower end of the upper heat exchange shell and the bottom of the box body; the upper end of the lower heat exchange shell is fixedly connected to the top of the box body, and the lower end of the lower heat exchange shell is fixedly connected to the bottom of the box body.

[0007] Preferably, the crude oil feed pipe corresponds to the feed end of the zigzag flow channel, and the crude oil discharge pipe corresponds to the discharge end of the zigzag flow channel.

[0008] Preferably, the upper heat exchange shell and the lower heat exchange shell have the same specifications, the heat conducting fins 1 on both sides of the upper heat exchange shell are arranged to be tilted downward, and the heat conducting fins 2 on both sides of the lower heat exchange shell are arranged to be tilted upward.

[0009] Preferably, a heat exchange medium feed manifold is provided on one side of the box body, and the heat exchange medium feed manifold is provided with a plurality of branch pipes connected to the upper heat exchange shell and the lower heat exchange shell; a heat exchange medium discharge manifold is provided on the other side of the box body, and the heat exchange medium discharge manifold is provided with a plurality of branch pipes connected to the upper heat exchange shell and the lower heat exchange shell.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a plurality of staggered upper heat exchange shells and lower heat exchange shells, a zigzag flow channel is formed inside the box body, and the raw oil flows in the zigzag flow channel, which increases the circulation time. The raw oil exchanges heat with the heat exchange medium in the upper heat exchange shell and the lower heat exchange shell to complete the heat exchange. In addition, heat-conducting fins 1 are set on both sides of the upper heat exchange shell, and heat-conducting fins 2 are set on both sides of the lower heat exchange shell, which is beneficial to heat exchange. Moreover, the heat-conducting fins 1 and 2 between adjacent upper heat exchange shells and lower heat exchange shells are staggered at intervals, which further extends the circulation time of the raw oil between the adjacent upper heat exchange shells and lower heat exchange shells, thereby extending the circulation time of the raw oil in the box body as a whole, so that it can fully contact with the upper heat exchange shell and the lower heat exchange shell, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of the utility model;

[0012] Figure 2 This is a top view of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the upper heat exchange shell of the utility model;

[0014] Figure 4 This is a schematic diagram of the cooperation between the upper heat exchange shell and the lower heat exchange shell of the utility model.

[0015] In the figure: 1 box body, 2 upper heat exchange shell, 3 heat transfer fin 1, 4 raw oil feed pipe, 5 raw oil discharge pipe, 6 lower heat exchange shell, 7 heat transfer fin 2, 8 heat exchange medium discharge header, 9 heat exchange medium feed header. DETAILED DESCRIPTION

[0016] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", and "right" indicating directions or positional relationships, they are only corresponding to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0017] See also Figure 1-4 The utility model provides a technical solution: a raw oil feed heat exchange device for a coal-based distillation device, comprising a box body 1, wherein a plurality of staggered upper heat exchange shells 2 and lower heat exchange shells 6 are arranged at intervals inside the box body 1, and a heat exchange medium circulates in the upper heat exchange shells 2 and the lower heat exchange shells 6. The plurality of upper heat exchange shells 2 and the lower heat exchange shells 6 and the inner wall of the box body 1 form a folded flow channel, and the two opposite side walls of the box body 1 are respectively connected to a raw oil feed pipe 4 and a raw oil discharge pipe 5; the two-phase back side plates of the upper heat exchange shell 2 are symmetrically provided with a plurality of heat conducting fins 3, and the two-phase back side plates of the lower heat exchange shell 6 are symmetrically provided with a plurality of heat conducting fins 7; the heat conducting fins 3 and the heat conducting fins 7 between adjacent upper heat exchange shells 2 and lower heat exchange shells 6 are staggered in an upper and lower manner;

[0018] It can be understood that by providing a plurality of staggered upper heat exchange shells 2 and lower heat exchange shells 6, a zigzag flow channel is formed inside the housing 1. The raw oil flows in the zigzag flow channel, which increases the circulation time. The raw oil exchanges heat with the heat exchange medium in the upper heat exchange shell 2 and the lower heat exchange shell 6 to complete the heat exchange. In addition, heat-conducting fins 1 3 are provided on both sides of the upper heat exchange shell 2, and heat-conducting fins 2 7 are provided on both sides of the lower heat exchange shell 6, which is conducive to heat exchange. Moreover, the heat-conducting fins 1 3 and heat-conducting fins 2 7 between adjacent upper heat exchange shells 2 and lower heat exchange shells 6 are staggered at intervals, further extending the circulation time of the raw oil between the adjacent upper heat exchange shells 2 and lower heat exchange shells 6, thereby extending the circulation time of the raw oil in the housing 1 as a whole, allowing it to fully contact the upper heat exchange shell 2 and the lower heat exchange shell 6, thereby improving the heat exchange efficiency.

[0019] In this embodiment, specifically, the upper end of the upper heat exchange shell 2 is fixedly connected to the top of the box body 1, and a gap is left between the lower end of the upper heat exchange shell 2 and the bottom of the box body 1. A gap is left between the upper end of the lower heat exchange shell 6 and the top of the box body 1, and the lower end of the lower heat exchange shell 6 is fixedly connected to the bottom of the box body 1. The raw oil flows through the gap, flowing back and forth, extending the circulation time of the oil.

[0020] Furthermore, the crude oil feed pipe 4 corresponds to the feed end of the folded flow channel, and the crude oil discharge pipe 5 corresponds to the discharge end of the folded flow channel;

[0021] Furthermore, the upper heat exchange shell 2 and the lower heat exchange shell 6 have the same specifications. The heat-conducting fins 3 on both sides of the upper heat exchange shell 2 are arranged downwardly and tilted, while the heat-conducting fins 7 on both sides of the lower heat exchange shell 6 are arranged upwardly and tilted. That is, the upper heat exchange shell 2 is fixedly connected to the upper inner portion of the box body 1, and the lower heat exchange shell 6 is fixedly connected to the lower inner portion of the box body 1. That is, relative to the upper heat exchange shell 2, the lower heat exchange shell 6 is installed upside down, which is easy to manufacture.

[0022] In addition, a heat exchange medium feed manifold 9 is provided on one side of the box body 1, and the heat exchange medium feed manifold 9 is provided with a plurality of branch pipes connected to the upper heat exchange shell 2 and the lower heat exchange shell 6. The heat exchange medium enters the upper heat exchange shell 2 and the lower heat exchange shell 6 through the heat exchange medium feed manifold 9 and the plurality of branch pipes; a heat exchange medium discharge manifold 8 is provided on the other side of the box body 1, and the heat exchange medium discharge manifold 8 is provided with a plurality of branch pipes connected to the upper heat exchange shell 2 and the lower heat exchange shell 6. The medium that completes heat exchange flows into the heat exchange medium discharge manifold 8 through the plurality of branch pipes. The heat exchange medium feed manifold 9 and the heat exchange medium discharge manifold 8 are connected to the external heating system through relevant pipelines.

[0023] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the content of the present invention.

Claims

1. A raw oil feed heat exchange device for a coal-based distillation device, comprising a housing (1), characterized in that: The interior of the box body (1) is provided with a plurality of staggered upper heat exchange shells (2) and lower heat exchange shells (6), and heat exchange medium circulates in the upper heat exchange shells (2) and the lower heat exchange shells (6). The plurality of upper heat exchange shells (2) and the lower heat exchange shells (6) and the inner wall of the box body (1) form a folded flow channel, and the two opposite side walls of the box body (1) are respectively connected to the raw oil feed pipe (4) and the raw oil discharge pipe (5); the two-phase back side plates of the upper heat exchange shell (2) are symmetrically provided with a plurality of heat conducting fins (3), and the two-phase back side plates of the lower heat exchange shell (6) are symmetrically provided with a plurality of heat conducting fins (7), and the heat conducting fins (3) and the heat conducting fins (7) between the adjacent upper heat exchange shells (2) and the lower heat exchange shells (6) are staggered in the upper and lower directions.

2. The raw oil feed heat exchange device for a coal-based distillation device according to claim 1, characterized in that: The upper end of the upper heat exchange shell (2) is fixedly connected to the top of the box body (1), and a gap is left between the lower end of the upper heat exchange shell (2) and the bottom of the box body (1); the upper end of the lower heat exchange shell (6) is fixedly connected to the bottom of the box body (1).

3. The raw oil feed heat exchange device for a coal-based distillation device according to claim 1, characterized in that: The crude oil feed pipe (4) corresponds to the feed end of the folded flow channel, and the crude oil discharge pipe (5) corresponds to the discharge end of the folded flow channel.

4. The raw oil feed heat exchange device for a coal-based distillation device according to claim 1, characterized in that: The upper heat exchange shell (2) and the lower heat exchange shell (6) have the same specifications. The heat conduction fins (3) on both sides of the upper heat exchange shell (2) are arranged to be tilted downward, and the heat conduction fins (7) on both sides of the lower heat exchange shell (6) are arranged to be tilted upward.

5. The raw oil feed heat exchange device for a coal-based distillation device according to claim 1, characterized in that: A heat exchange medium feed header (9) is provided on one side of the box body (1), and the heat exchange medium feed header (9) is provided with a plurality of branch pipes connected to the upper heat exchange shell (2) and the lower heat exchange shell (6); a heat exchange medium discharge header (8) is provided on the other side of the box body (1), and the heat exchange medium discharge header (8) is provided with a plurality of branch pipes connected to the upper heat exchange shell (2) and the lower heat exchange shell (6).

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