Dry gas recovery device for n-butane production

Abstract

The dry gas recovery device for n-butane production comprises a recovery box body, a flow dividing box, a gas inlet pipe, a gas pump and two sets of adsorption assemblies, the flow dividing box is arranged in the recovery box body and close to the bottom of the recovery box body, the flow dividing box is provided with a hollow cavity, and flow dividing holes communicating with a hollow structure of the hollow cavity are densely formed in the top of the flow dividing box; one end of the air inlet pipe extends into the recycling box and communicates with the hollow cavity of the flow dividing box, and an air pump is arranged on the air inlet pipe and used for pumping dry air and sending the dry air into the hollow cavity of the flow dividing box through the air inlet pipe. The adsorption assembly comprises an adsorption box, a partition plate, an agent storage drawer, a vent groove, a connecting pipe, an electromagnetic valve and an exhaust pipe, and the adsorption box is of a hollow structure. The two adsorption assemblies are adopted, when the adsorbent in one adsorption assembly is replaced, the channel of the other adsorption assembly is opened, and then the channel of the adsorbent to be replaced is closed, so that the adsorbent is convenient to replace.

Description

Technical Field

[0001] The present application relates to the technical field of gas recovery, and particularly to a dry gas recovery device for n-butane production. Background Art

[0002] Dry gas refers to the non-condensable gas generated and recovered during the oil refining process in a refinery. Its main components are ethylene, propylene, methane, ethane, propane, butane, etc., and it is mainly used as fuel and chemical raw materials. Refinery dry gas mainly comes from the secondary processing process of crude oil.

[0003] In the existing dry gas recovery and treatment device, when replacing the adsorbent, the device needs to be stopped, resulting in the device being unable to operate, affecting production efficiency and increasing costs. Summary of the Invention

[0004] The purpose of the present application is to provide a dry gas recovery device for n-butane production to solve the above problems. The device adopts two adsorption components, and the two adsorption components can work separately, so that when one is working, the adsorbent in the other adsorption component can be replaced.

[0005] The present application achieves the above purpose through the following technical solutions:

[0006] A dry gas recovery device for n-butane production includes a recovery box body, a shunt box, an inlet pipe, an air pump, and two groups of adsorption components. The shunt box is arranged near the bottom inside the recovery box body. The shunt box has a hollow chamber, and the top of the shunt box is densely provided with shunt holes communicating with its hollow structure. One end of the inlet pipe extends into the recovery box body and is communicated with the hollow chamber of the shunt box. An air pump is arranged on the inlet pipe for extracting dry gas and sending it into the hollow chamber of the shunt box through the inlet pipe. The adsorption component includes an adsorption box, a partition board, a storage drawer, a ventilation groove, a connecting pipe, a solenoid valve, and an exhaust pipe. The adsorption box is of a hollow structure. The partition board is fixedly arranged inside the adsorption box and has a gap with the bottom inside the adsorption box to form an air flow chamber. The front part of the adsorption box has an opening for the storage drawer to enter and exit. The bottom of the partition board and the storage drawer are both provided with corresponding ventilation grooves. The bottom of the adsorption box is provided with a connecting pipe communicating with the air flow chamber. A solenoid valve is arranged on the connecting pipe. The top of the adsorption box is communicated with an exhaust pipe.

[0007] Further, a check valve is also arranged on the inlet pipe.

[0008] Further, feet are fixedly arranged at the four corners of the bottom of the recovery box body.

[0009] Further, a water injection pipe is communicated with the upper part of the side surface of the recovery box body. A water injection pipe valve is arranged on the water injection pipe. A drain pipe is communicated with the bottom of the recovery box body. A drain pipe valve is arranged on the drain pipe.

[0010] Furthermore, two groups of adsorption components are arranged side by side and fixedly connected; the four sides of the adsorption box in each group of adsorption components are fixedly connected to the inner side of the recovery box body to ensure air tightness, and an opening for the agent storage drawer to enter and exit is opened at the front of the recovery box body, a sealing plate is fixedly arranged at the front of the agent storage drawer, a handle is arranged at the front of the sealing plate, and the top of the agent storage drawer is open.

[0011] Furthermore, exhaust pipes are all provided with exhaust pipe valves, and ends of the exhaust pipes facing away from the adsorption box are all connected with the central pipe.

[0012] Compared with the prior art, the present application adopts two adsorption components. When the adsorbent in one of the adsorption components is replaced, the channel of the other adsorption component is opened, and then the channel of the adsorbent to be replaced is closed to facilitate the replacement of the adsorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the structure of this application;

[0015] Figure 2 It is a schematic diagram of the internal structure of the recycling box of the present application;

[0016] Figure 3 It is a schematic diagram of the diversion hole structure of the present application;

[0017] Figure 4 It is a schematic diagram of the adsorption box structure of the present application.

[0018] The following are the descriptions of the reference numerals:

[0019] 1. Recovery box; 2. Diversion box; 3. Diversion hole; 4. Inlet pipe; 5. One-way valve; 6. Air pump; 7. Support foot; 8. Drain pipe; 9. Adsorption box; 10. Partition; 11. Storage drawer; 12. Ventilation groove; 13. Handle; 14. Sealing plate; 15. Connecting pipe; 16. Solenoid valve; 17. Exhaust pipe; 18. Central pipe; 19. Exhaust pipe valve; 20. Water injection pipe; 21. Water injection pipe valve; 22. Drain pipe valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0021] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are all based on the attached Figure 1 , and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0022] As Figures 1-4 shown, a dry gas recovery device for n-butane production includes a recovery box body 1, a shunt box 2, an inlet pipe 4, an air pump 6, and two groups of adsorption components. The shunt box 2 is arranged inside the recovery box body 1 near its bottom. The shunt box 2 has a hollow chamber. The top of the shunt box 2 is densely provided with shunt holes 3 communicating with its hollow structure. One end of the inlet pipe 4 extends into the recovery box body 1 and is communicated with the hollow chamber of the shunt box 2. An air pump 6 is arranged on the inlet pipe 4 for extracting dry gas and sending it into the hollow chamber of the shunt box 2 through the inlet pipe 4; The adsorption component includes an adsorption box 9, a partition plate 10, a storage drawer 11, a ventilation groove 12, a connecting pipe 15, a solenoid valve 16, and an exhaust pipe 17. The adsorption box 9 is of a hollow structure. The partition plate 10 is fixedly arranged inside the adsorption box 9, and there is a gap between the partition plate 10 and the inner bottom of the adsorption box 9 to form an air flow chamber. The front part of the adsorption box 9 has an opening for the storage drawer 11 to enter and exit. Corresponding ventilation grooves 12 are provided at the bottoms of the partition plate 10 and the storage drawer 11. A connecting pipe 15 communicating with the air flow chamber is arranged at the bottom of the adsorption box 9. A solenoid valve 16 is arranged on the connecting pipe 15. An exhaust pipe 17 is communicated and arranged at the top of the adsorption box 9.

[0023] Specifically, the end of the inlet pipe 4 connected to the shunt box 2 is bent downward to be connected to the shunt box 2 to prevent the bromine water from flowing back to the position of the air pump 6. The shunt holes 3 are arranged at the top of the shunt box 2 so that the dry gas is discharged from the top of the shunt box 2. The dry gas is mixed with the bromine water during the rising process in the bromine water. The adsorption box 9 is used to accommodate the storage drawer 11 and at the same time allows the dry gas to flow inside it. The storage drawer 11 is used to store the adsorbent and can be pulled out or pushed into the adsorption box 9 for easy replacement of the adsorbent. At the same time, the partition plate 10 supports the adsorption box 9 to slide on its surface to filter out impurities therein. Then the dry gas is further purified by the adsorbent and then discharged and recovered from the exhaust pipe 17.

[0024] Furthermore, a check valve 5 is also arranged on the inlet pipe 4 to prevent the bromine water from flowing back.

[0025] Furthermore, feet 7 are fixedly arranged at the four corners of the bottom of the recovery box body 1 to support the recovery box body 1.

[0026] Furthermore, a water injection pipe 20 is connected to the upper side of the recovery box 1 , and a water injection pipe valve 21 is provided on the water injection pipe 20 ; a drainage pipe 8 is connected to the bottom of the recovery box 1 , and a drainage pipe valve 22 is provided on the drainage pipe 8 .

[0027] Specifically, bromine water can be injected into the recovery box 1 through the water injection pipe 20 , and the bromine water can be discharged through the drainage pipe 8 .

[0028] Furthermore, two groups of adsorption components are arranged side by side and fixedly connected; the four sides of the adsorption box 9 in each group of adsorption components are fixedly connected to the inner side of the recovery box 1 to ensure air tightness, and an opening for the agent storage drawer 11 to enter and exit is provided at the front of the recovery box 1, and a sealing plate 14 is fixedly provided at the front of the agent storage drawer 11, and a handle 13 is provided at the front of the sealing plate 14, and the top of the agent storage drawer 11 is open.

[0029] Specifically, the connection between the adsorption box 9 and the recovery box 1 ensures airtightness so that dry gas can only enter the adsorption box 9 and the storage drawer 11 from the connecting pipe 15, thereby preventing unfiltered dry gas from passing through. The handle 13 facilitates pushing and pulling the storage drawer 11, and the sealing plate 14 can seal the opening at the front of the recovery box 1 to prevent dry gas leakage.

[0030] Furthermore, the exhaust pipe 17 is provided with an exhaust pipe valve 19, and one end of the exhaust pipe 17 away from the adsorption box 9 is connected to the centralizing pipe 18 for centralized discharge and recovery.

[0031] In the above structure, when it is necessary to remove impurities from the dry gas, the dry gas is extracted by the air pump 6 and then sent to the recovery box 1 through the air inlet pipe 4. At this time, bromine water is stored in the recovery box 1. The dry gas passes through the air inlet pipe 4 and enters the diverter box 2, and then is evenly discharged through the diverter hole 3, so that the bromine water filters the ethylene in the dry gas. Then the gas rises and enters the adsorption box 9 from one of the connecting pipes 15, and then passes through the ventilation groove 12 to enter the storage drawer 11. The adsorbent is stored in the storage drawer 11, and the adsorbent adsorbs water vapor in the dry gas. Then the dry gas continues to flow to the exhaust pipe 17, and then is discharged from the central pipe 18 to complete the collection and recovery. When the adsorbent needs to be replaced, the solenoid valve 16 on the connecting pipe 15 at the bottom of the storage drawer 11 storing the adsorbent to be replaced is closed, and the other solenoid valve 16 is opened to allow the dry gas to pass, so as to realize the replacement of the adsorbent without shutting down the equipment. Then the storage drawer 11 is drawn out to replace the adsorbent, and the storage drawer 11 is pushed into the adsorption box 9 after replacement.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A dry gas recovery device for n-butane production, characterized in that: The invention comprises a recovery box (1), a diverter box (2), an air intake pipe (4), an air pump (6) and two groups of adsorption components. The diverter box (2) is arranged in the recovery box (1) near the bottom thereof. The diverter box (2) has a hollow chamber. The top of the diverter box (2) is densely covered with diverter holes (3) connected to the hollow structure thereof. One end of the air intake pipe (4) extends into the recovery box (1) and is connected to the hollow chamber of the diverter box (2). The air intake pipe (4) is provided with an air pump (6) for extracting dry gas and sending it into the hollow chamber of the diverter box (2) through the air intake pipe (4). The adsorption components comprise an adsorption box (9), a partition plate (10), a storage drawer (11), and a ventilation groove. (12), a connecting pipe (15), a solenoid valve (16), and an exhaust pipe (17), wherein the adsorption box (9) is a hollow structure, the partition (10) is fixedly arranged in the adsorption box (9), and a gap is formed between the partition (10) and the bottom of the adsorption box (9) to form an air flow chamber, the front of the adsorption box (9) has an opening for the storage drawer (11) to enter and exit, the partition (10) and the bottom of the storage drawer (11) are both provided with corresponding ventilation grooves (12), the bottom of the adsorption box (9) is provided with a connecting pipe (15) connected to the air flow chamber, the connecting pipe (15) is provided with a solenoid valve (16), and the top of the adsorption box (9) is connected with the exhaust pipe (17).

2. A dry gas recovery device for n-butane production according to claim 1, characterized in that: A one-way valve (5) is also provided on the air intake pipe (4).

3. A dry gas recovery device for n-butane production according to claim 1, characterized in that: Support feet (7) are fixedly provided at the four corners of the bottom of the recovery box (1).

4. A dry gas recovery device for n-butane production according to claim 1, characterized in that: A water injection pipe (20) is provided at the upper side of the recovery box (1), and a water injection pipe valve (21) is provided on the water injection pipe (20). A drainage pipe (8) is provided at the bottom of the recovery box (1), and a drainage pipe valve (22) is provided on the drainage pipe (8).

5. A dry gas recovery device for n-butane production according to claim 1, characterized in that: Two groups of adsorption components are arranged side by side and fixedly connected to each other; the four sides of the adsorption box (9) in each group of adsorption components are fixedly connected to the inner side of the recovery box body (1) to ensure air tightness; the front of the recovery box body (1) is provided with an opening for the agent storage drawer (11) to enter and exit; the front of the agent storage drawer (11) is fixedly provided with a sealing plate (14); the front of the sealing plate (14) is provided with a handle (13); and the top of the agent storage drawer (11) is open.

6. A dry gas recovery device for n-butane production according to claim 1, characterized in that: An exhaust pipe valve (19) is provided on each exhaust pipe (17), and one end of the exhaust pipe (17) facing away from the adsorption box (9) is connected to the central pipe (18).

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