Atmospheric tower for producing naphtha

Abstract

The utility model discloses an atmospheric tower for producing naphtha, which comprises a tower body, an oil inlet pipe welded at the bottom end of the front side of the tower body, an output pipe welded at the top end of the tower body, a waste gas circulating pipe I arranged at the left end of the top of the tower body, and a waste gas circulating pipe II arranged at the right end of the top of the tower body, a first filtering and discharging box is arranged at the bottom end of the first waste gas circulating pipe and connected with the first waste gas circulating pipe through bolts, a second filtering and discharging box is arranged at the bottom end of the second waste gas circulating pipe and connected with the second waste gas circulating pipe through bolts, a first pressure conveying machine is arranged at the bottom end of the first filtering and discharging box, and a first pressure tank is arranged at the bottom end of the first pressure conveying machine. A second pressure conveying machine is arranged at the bottom end of the second filtering and discharging box, and a second pressure tank is arranged at the bottom end of the second pressure conveying machine, the device relates to the technical field of atmospheric towers, the utilization effect of waste gas discharged during rectification of the pressure production tower is improved, and the injection pressure uniformity is kept through multi-point and multi-area injection pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of atmospheric pressure towers, in particular to an atmospheric pressure tower for producing naphtha. Background Art

[0002] Naphtha is one of the petroleum products, also known as chemical light oil and crude gasoline. It is a light oil used as a chemical raw material produced by processing crude oil or other raw materials. It is mainly used as a chemical raw material. There are various distillation ranges due to different uses. China stipulates that the distillation range is about 220°C at the initial distillation point. When used as a cracking raw material for producing ethylene, a fraction of 70°C to 145°C is used, which is called light naphtha; when used for the purpose of producing aromatics or high-octane gasoline, a fraction of 70°C to 180°C is used, which is called heavy naphtha; when used as a solvent, it is called solvent naphtha; aromatic solvents from coal tar are also called heavy naphtha or solvent naphtha. Many devices are needed in the production process of naphtha, such as atmospheric towers, but the existing atmospheric towers for producing naphtha still have many problems when used.

[0003] The existing atmospheric tower for producing naphtha has the following problems when in use:

[0004] 1. Atmospheric pressure towers are usually used for distillation purposes, so it is necessary to maintain stable pressure and distillation heat at the same time. Therefore, when in use, the waste gas generated by the distillation heat transfer will be continuously discharged. Maintaining stable pressure requires injection pressure, which is about the problem of insufficient utilization of the discharged waste gas;

[0005] 2. At the same time, the injection pressure is responsible for the overall stability of the atmospheric tower, which is extremely important during operation. However, most of the existing injection pressures are single-point single-area injections, which require the internal pressure to be naturally neutralized and diffused, and the injection pressure uniformity is insufficient. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a normal pressure tower for producing naphtha, which improves the utilization effect of waste gas discharged during distillation in the pressure tower and maintains injection pressure uniformity through multi-point and multi-region injection pressure.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a normal pressure tower for producing naphtha, comprising a tower body, an oil inlet pipe welded at the bottom end of the front side of the tower body, an output pipe welded at the top end of the tower body, an exhaust gas circulation pipe 1 is arranged at the left end of the top of the tower body, an exhaust gas circulation pipe 2 is arranged at the right end of the top of the tower body, a filter discharge box 1 is arranged at the bottom end of the exhaust gas circulation pipe 1 and is connected by bolts, a filter discharge box 2 is arranged at the bottom end of the exhaust gas circulation pipe 2 and is connected by bolts, a pressure machine 1 is arranged at the bottom end of the filter discharge box 1, a pressure tank 1 is arranged at the bottom end of the pressure machine 1, a pressure machine 2 is arranged at the bottom end of the filter discharge box 2, and a pressure tank 2 is arranged at the bottom end of the pressure machine 2.

[0010] Preferably, a first pressure delivery pipe is provided on the right side of the pressure delivery machine and is connected by bolts, and a third pressure delivery pipe is provided near the middle end of the first pressure delivery pipe.

[0011] Preferably, a third pressure delivery pipe is provided on the left side of the second pressure delivery machine and is connected by bolts, and a fourth pressure delivery pipe is provided near the middle end of the third pressure delivery pipe.

[0012] Preferably, a normal pressure joint 1 is provided on the left side of the tower body near the top and is connected by welding, and a normal pressure joint 2 is provided on the right side of the tower body near the top and is connected by welding, the left end of the normal pressure joint 1 is connected to the first pressure pipe through a flange, and the right end of the normal pressure joint 2 is connected to the second pressure pipe through a flange.

[0013] Preferably, a normal pressure joint three is provided on the left side of the tower body near the bottom end and is connected by welding, and a normal pressure joint four is provided on the right side of the tower body near the bottom end and is connected by welding, the left end of the normal pressure joint three is connected to the third pressure pipe through a flange, and the right end of the normal pressure joint four is connected to the fourth pressure pipe through a flange.

[0014] Preferably, a graded distillation box is provided at the bottom end of the inner wall of the tower body and at the top end of the inner wall of the tower body, and a normal pressure transmission groove is provided at both ends of the inner wall of the graded distillation box.

[0015] (III) Beneficial effects

[0016] The utility model provides an atmospheric pressure tower for producing naphtha, which has the following beneficial effects:

[0017] (1) The atmospheric pressure tower for producing naphtha is provided with a tower body. When the tower body is distilled at atmospheric pressure, the waste gas will continue to rise. Therefore, a waste gas circulation pipe 1 and a waste gas circulation pipe 2 are arranged at the top of the tower body. Therefore, the waste gas can be discharged and transmitted through the double waste gas circulation pipes, and the double waste gas circulation pipes can guide the waste gas to be transmitted and wait for recycling. The waste gas transmitted by the waste gas circulation pipe 1 can be transmitted and filtered through the filter discharge box area 1, and then extracted by the negative pressure of the pressure machine 1 for reuse. The pressure tank area 1 can store the waste gas and also store the external input operation demand pressure. The waste gas transmitted by the waste gas circulation pipe 2 can be transmitted and filtered through the filter discharge box area 2, and then extracted by the negative pressure of the pressure machine 2 for reuse. The pressure tank area 2 can store the waste gas and also store the external input operation demand pressure. Therefore, the waste gas can be recycled and then injected through multiple pressure pipes to maintain the utilization effect. The relevant structural components cooperate with each other to improve the utilization effect of the waste gas discharged during the distillation of the pressure tower.

[0018] (2) The atmospheric pressure tower for producing naphtha is provided with a tower body, and a graded distillation box is arranged inside the tower body to perform graded atmospheric distillation operation. Therefore, multiple atmospheric pressure injection joints are arranged. When the pressure machine 1 is in operation, the pressure can be extracted from the inside of the pressure tank 1 through its own pipeline assembly and transmitted and supplied. The pressure can be transmitted through the first pressure pipe and the third pressure pipe area. The first pressure pipe can be transmitted through the atmospheric pressure joint 1 for pressure injection, and the third pressure pipe can be transmitted through the atmospheric pressure joint 3 for pressure injection. When the pressure machine 2 is in operation, the pressure can be extracted from the inside of the pressure tank 2 through its own pipeline assembly and transmitted and supplied. The pressure can be transmitted through the second pressure pipe and the fourth pressure pipe area. The second pressure pipe can be transmitted through the atmospheric pressure joint 2 for pressure injection, and the fourth pressure pipe can be transmitted through the atmospheric pressure joint 4 for pressure injection. Because the graded distillation box is provided with an atmospheric pressure transmission groove, the atmospheric pressure injected from all four parts of the tower body can be evenly diffused through the atmospheric pressure transmission groove. The relevant structural components cooperate with each other to maintain injection pressure uniformity through multi-point and multi-region injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structure diagram of the utility model;

[0020] Figure 2 This is a front cross-sectional view of the tower area of ​​the utility model;

[0021] Figure 3 This is a top view cross-sectional view of the tower area of ​​the utility model;

[0022] Figure 4 This is a partial structural diagram of the second area of ​​the filter discharge box of the utility model.

[0023] In the figure: 1. tower body; 2. oil inlet pipe; 3. output pipe; 4. exhaust gas circulation pipe 1; 5. exhaust gas circulation pipe 2; 6. filter discharge box 1; 7. pressure machine 1; 8. pressure tank 1; 9. first pressure pipe; 10. filter discharge box 2; 11. pressure machine 2; 12. pressure tank 2; 13. second pressure pipe; 14. third pressure pipe; 15. fourth pressure pipe; 16. normal pressure joint 1; 17. normal pressure joint 2; 18. normal pressure joint 3; 19. normal pressure joint 4; 20. graded distillation box; 21. normal pressure transmission tank. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model embodiment provides a technical solution: an atmospheric pressure tower for producing naphtha, including a tower body 1, an oil inlet pipe 2 is welded at the bottom end of the front side of the tower body 1, and after the oil inlet pipe 2 area is connected to the external oil pipeline, the continuous input of oil body raw materials during atmospheric distillation production can be maintained, and an output pipe 3 is welded at the top of the tower body 1. After the output pipe 3 area is connected to the external pipeline, the oil and gas mixture after atmospheric distillation can be continuously output to the subsequent process, and an exhaust gas circulation pipe 1 4 is arranged at the left end of the top of the tower body 1, and an exhaust gas circulation pipe 2 5 is arranged at the right end of the top of the tower body 1. When the tower body 1 is distilled at atmospheric pressure, the exhaust gas will continue to rise, so the exhaust gas circulation pipe 1 4 and the exhaust gas circulation pipe 2 5 are deployed through the top of the tower body 1, so the exhaust gas can be discharged and transmitted through the double exhaust gas circulation pipes, and the double exhaust gas circulation pipes can guide the exhaust gas to be transmitted and wait for recycling. A filter discharge box 6 is provided at the end and connected by bolts, a filter discharge box 10 is provided at the bottom end of the exhaust gas circulation pipe 25 and connected by bolts, a pressure machine 7 is provided at the bottom end of the filter discharge box 6, a pressure tank 8 is provided at the bottom end of the pressure machine 7, a pressure machine 11 is provided at the bottom end of the filter discharge box 20, and a pressure tank 12 is provided at the bottom end of the pressure machine 21. The exhaust gas transmitted by the exhaust gas circulation pipe 14 can be transmitted and filtered through the filter discharge box 6 area, and then extracted by the pressure machine 7 for negative pressure and supplied again, the pressure tank 8 area can store exhaust gas and also store the external input operating demand pressure, the exhaust gas transmitted by the exhaust gas circulation pipe 25 can be transmitted and filtered through the filter discharge box 210 area, and then extracted by the pressure machine 11 for negative pressure and supplied again, the pressure tank 212 area can store exhaust gas and also store the external input operating demand pressure.

[0026] A first pressure pipe 9 is provided on the right side of the pressure pump 7 and is connected by bolts. A third pressure pipe 14 is provided near the middle end of the first pressure pipe 9. When the pressure pump 7 is in operation, pressure can be extracted from the pressure tank 8 through its own pipeline assembly and transmitted and supplied. The pressure can be transmitted through the first pressure pipe 9 and the third pressure pipe 14 area.

[0027] A third pressure pipe 14 is arranged on the left side of the second pressure pump 11 and is connected by bolts. A fourth pressure pipe 15 is arranged near the middle end of the third pressure pipe 14. When the second pressure pump 11 is in operation, it can draw pressure from the inside of the pressure tank 12 through its own pipeline assembly and transmit the pressure, which can be transmitted through the second pressure pipe 13 and the fourth pressure pipe 15 area.

[0028] A normal pressure joint 16 is provided on the left side of the tower body 1 near the top and is connected by welding. A normal pressure joint 2 17 is provided on the right side of the tower body 1 near the top and is connected by welding. The left end of the normal pressure joint 16 is connected to the first pressure pipe 9 through a flange, and the right end of the normal pressure joint 2 17 is connected to the second pressure pipe 13 through a flange. The pressure transmitted inside the first pressure pipe 9 can be transitionally transmitted through the normal pressure joint 16 area for normal pressure injection, and the pressure transmitted inside the third pressure pipe 14 can be transitionally transmitted through the normal pressure joint 3 18 area for normal pressure injection.

[0029] A normal pressure joint three 18 is provided on the left side of the tower body 1 near the bottom and is connected by welding. A normal pressure joint four 19 is provided on the right side of the tower body 1 near the bottom and is connected by welding. The left end of the normal pressure joint three 18 is connected to the third pressure pipe 14 through a flange, and the right end of the normal pressure joint four 19 is connected to the fourth pressure pipe 15 through a flange. The pressure transmitted inside the third pressure pipe 14 can be transitionally transmitted through the normal pressure joint three 18 area for pressure injection, and the pressure transmitted inside the fourth pressure pipe 15 can be transitionally transmitted through the normal pressure joint four 19 area for pressure injection.

[0030] A graded distillation box 20 is provided at the bottom end and the top end of the inner wall of the tower body 1, and an atmospheric pressure transmission groove 21 is provided at both ends of the inner wall of the graded distillation box 20. Because the atmospheric pressure transmission groove 21 is provided inside the graded distillation box 20, the atmospheric pressure injected from all four parts of the tower body 1 can be evenly diffused through the atmospheric pressure transmission groove 21.

[0031] Working principle: When the tower body 1 is distilled at normal pressure, the exhaust gas will continue to rise, so the exhaust gas circulation pipe 14 and the exhaust gas circulation pipe 25 are deployed at the top of the tower body 1, so the exhaust gas can be discharged and transmitted through the double exhaust gas circulation pipes, and the double exhaust gas circulation pipes can guide the exhaust gas to be transmitted and wait for recycling. The exhaust gas transmitted by the exhaust gas circulation pipe 14 can be transmitted and filtered through the filter discharge box 16 area, and then extracted by the negative pressure of the pressure machine 17 for reuse. The pressure tank 18 area can store the exhaust gas and also the external input operation demand pressure. The exhaust gas transmitted by the exhaust gas circulation pipe 25 can be transmitted and filtered through the filter discharge box 210 area, and then extracted by the negative pressure of the pressure machine 211 for reuse. The pressure tank 212 area can store the exhaust gas and also the external input operation demand pressure. The pressure machine 17 can be supplied through its own pipeline The component extracts pressure from the inside of the pressure tank 8 and transmits it for supply. It can be transmitted through the first pressure pipe 9 and the third pressure pipe 14 area. The first pressure pipe 9 can transmit through the normal pressure joint 16 for pressure injection. The third pressure pipe 14 can transmit through the normal pressure joint 3 18 for pressure injection. The pressure machine 2 11 can extract pressure from the inside of the pressure tank 2 12 through its own pipeline component and transmit it for supply. It can be transmitted through the second pressure pipe 13 and the fourth pressure pipe 15 area. The second pressure pipe 13 can transmit through the normal pressure joint 2 17 for pressure injection. The fourth pressure pipe 15 can transmit through the normal pressure joint 4 19 for pressure injection. Because the graded distillation box 20 is provided with a normal pressure transmission groove 21, the normal pressure injected from all sides of the tower body 1 can be evenly diffused through the normal pressure transmission groove 21.

[0032] The utility model includes: 1, tower body; 2, oil inlet pipe; 3, output pipe; 4, exhaust gas circulation pipe 1; 5, exhaust gas circulation pipe 2; 6, filter discharge box 1; 7, pressure machine 1; 8, pressure tank 1; 9, first pressure pipe; 10, filter discharge box 2; 11, pressure machine 2; 12, pressure tank 2; 13, second pressure pipe; 14, third pressure pipe; 15, fourth pressure pipe; 16, normal pressure joint 1; 17, normal pressure joint 2; 18, normal pressure joint 3; 19, normal pressure joint 4; 20, graded distillation box; 21, normal pressure transmission tank. All the components are general standard parts or components known to those skilled in the art. The structure and principle thereof are known to those skilled in the art through technical manuals or obtained through conventional experimental methods. It is known that the problems solved by the utility model are: 1. The existing atmospheric pressure tower for producing naphtha is usually used for distillation purposes, so it is necessary to maintain stable pressure and distillation heat at the same time. Therefore, the waste gas generated by the distillation heat transfer will be continuously discharged during use. Maintaining stable pressure requires injection pressure, and there is a problem of insufficient utilization of the discharged waste gas; 2. At the same time, the injection pressure is responsible for the overall stability of the atmospheric pressure tower, which is extremely important during operation. However, most of the existing injection pressure is single-point and single-area injection, which requires natural neutralization and diffusion of internal pressure, and the injection pressure uniformity is insufficient. The utility model improves the utilization effect of the waste gas discharged during distillation of the pressure producing tower through the mutual combination of the above-mentioned components, and maintains the injection pressure uniformity through multi-point and multi-area injection pressure.

[0033] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An atmospheric tower for producing naphtha, characterized in that: The invention comprises a tower body (1), an oil inlet pipe (2) is welded at the bottom end of the front side of the tower body (1), an output pipe (3) is welded at the top end of the tower body (1), an exhaust gas circulation pipe (1) is arranged at the left end of the top of the tower body (1), an exhaust gas circulation pipe (2) is arranged at the right end of the top of the tower body (1), a filter discharge box (1) is arranged at the bottom end of the exhaust gas circulation pipe (4) and connected by bolts, a filter discharge box (2) is arranged at the bottom end of the exhaust gas circulation pipe (5) and connected by bolts, a pressure machine (7) is arranged at the bottom end of the filter discharge box (6), a pressure tank (8) is arranged at the bottom end of the pressure machine (7), a pressure machine (11) is arranged at the bottom end of the filter discharge box (10), and a pressure tank (12) is arranged at the bottom end of the pressure machine (11).

2. An atmospheric tower for producing naphtha according to claim 1, characterized in that: A first pressure delivery pipe (9) is arranged on the right side of the pressure delivery machine (7) and is connected by bolts, and a third pressure delivery pipe (14) is arranged near the middle end of the first pressure delivery pipe (9).

3. An atmospheric tower for producing naphtha according to claim 1, characterized in that: A third pressure delivery pipe (14) is arranged on the left side of the second pressure delivery machine (11) and is connected by bolts, and a fourth pressure delivery pipe (15) is arranged near the middle end of the third pressure delivery pipe (14).

4. An atmospheric tower for producing naphtha according to claim 1, characterized in that: A normal pressure joint 1 (16) is provided on the left side of the tower body (1) near the top and connected by welding, and a normal pressure joint 2 (17) is provided on the right side of the tower body (1) near the top and connected by welding, the left end of the normal pressure joint 1 (16) is connected to the first pressure pipe (9) via a flange, and the right end of the normal pressure joint 2 (17) is connected to the second pressure pipe (13) via a flange.

5. An atmospheric tower for producing naphtha according to claim 1, characterized in that: A normal pressure joint three (18) is provided on the left side of the tower body (1) near the bottom end and is connected by welding, and a normal pressure joint four (19) is provided on the right side of the tower body (1) near the bottom end and is connected by welding, the left end of the normal pressure joint three (18) is connected to the third pressure pipe (14) via a flange, and the right end of the normal pressure joint four (19) is connected to the fourth pressure pipe (15) via a flange.

6. An atmospheric tower for producing naphtha according to claim 1, characterized in that: A grading distillation box (20) is provided at the bottom end of the inner wall of the tower body (1) and at the top end of the inner wall of the tower body (1), and a normal pressure transmission groove (21) is provided at both ends of the inner wall of the grading distillation box (20).

Images