CN111139114A

CN111139114A - Propane removing device

Info

Publication number: CN111139114A
Application number: CN201911376069.3A
Authority: CN
Inventors: 黄帮义
Original assignee: Anhui Haide Chemical Technology Co ltd
Current assignee: Anhui Haide Chemical Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-05-12

Abstract

The invention relates to the technical field of petrochemical industry, and particularly discloses a depropanization device, which comprises a depropanization tower, a feeding box, a separation box and a discharge cylinder, wherein the depropanization tower is provided with a first feeding hole, a first discharge hole, a reflux inlet and a first discharge hole; the sorting box is provided with a second feeding hole, a second discharging hole and a backflow outlet, the first discharging hole is mutually connected with the second feeding hole, and the backflow inlet is mutually connected with the backflow outlet; a cooling sleeve is arranged on the outer side of the discharge cylinder and is connected with the feeding box; a buffer cavity is arranged in the feeding box, a feeding pipeline is arranged in the buffer cavity, and the feeding pipeline is mutually connected with the first feeding hole; the invention preheats the raw materials by using the water for cooling the discharged materials in the depropanizing tower, fully utilizes the heat in the process and saves the energy.

Description

Propane removing device

Technical Field

The invention relates to the technical field of petrochemical industry, in particular to a propane removal device.

Background

The petroleum and natural gas is a compound composed of hydrocarbon substances and non-hydrocarbon substances, wherein the hydrocarbon substances mainly comprise alkane, alkene, alkyne, cyclic hydrocarbon, aromatic hydrocarbon and the like. The depropanization device can mainly produce C3 (propane) products, C4+ products and light hydrocarbon products, wherein C3 is alkane substances, can be used for fuels and refrigerants, is widely applied to industrial departments and fields such as chemical industry, metallurgy, electronics, petroleum and the like, and is also used for organic synthesis and the like; the C4+ product is the raw material of isooctane, methyl tert-butyl ether (MTBE), heavy aromatics and other products. Propane has high combustion heat value, hardly generates pollution after combustion, replaces gasoline to be used as automobile fuel, has mature technology, has lower fuel cost and has good social benefit and economic benefit.

When the propane removal is carried out, the raw materials need to be preheated, so that the reaction is convenient, and when the waste materials are discharged, the temperature needs to be aligned and reduced due to high temperature; the two processes additionally increase the energy supply of the reaction, and the energy consumption condition is serious.

Disclosure of Invention

The present invention is directed to a depropanizer to solve the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a depropanization device comprises a depropanization tower, a feeding box, a separation box and a discharging cylinder, wherein the depropanization tower is provided with a first feeding hole, a first discharging hole, a reflux inlet and a first discharging hole; the separation box is provided with a second feeding hole, a second discharging hole and a backflow outlet, the first discharging hole is mutually connected with the second feeding hole, and the backflow inlet is mutually connected with the backflow outlet; a cooling sleeve is arranged on the outer side of the discharge cylinder and is connected with the feeding box; the feeding box is internally provided with a buffer cavity, a feeding pipeline is arranged in the buffer cavity, and the feeding pipeline is connected with the first feeding hole.

Preferably, the feeding pipeline is of a spiral structure and is arranged along the length direction of the buffer cavity; the feeding box is provided with a first water inlet and a first water outlet, the cooling sleeve is provided with a second water inlet and a second water outlet, and the first water inlet is communicated with the second water outlet.

Preferably, the cooling sleeve is annular, and two ends of the cooling sleeve are sleeved outside the discharge cylinder; and a closed cooling chamber is arranged between the cooling sleeve and the discharge cylinder.

The invention also provides a using method of the propane removing device, which comprises the following steps:

s1: adding raw materials into a feeding pipeline;

s2: the buffer cavity is communicated with the cooling sleeve, and hot water is added into the buffer cavity;

s3: heating the raw materials in the buffer cavity, and then feeding the raw materials into a depropanizing tower for depropanizing operation;

s4: the first discharge port discharges the raw material subjected to propane removal, and the raw material enters a separation box for gas-liquid separation;

s5: the gas is discharged through a second discharge port to carry out the next procedure, and the liquid flows back into the depropanizing tower through a reflux outlet;

s6: the first discharge port discharges processing waste, the processing waste enters the discharge cylinder, is cooled under the action of the cooling sleeve, and the cooled raw materials are discharged for recycling in the next procedure;

s7: the process loops through steps S1 to S6.

Preferably, in step S2, a liquid level sensor and a temperature sensor are disposed in the buffer chamber to ensure that the water level in the buffer chamber is above the feeding pipe and that the temperature is not lower than 65 ℃.

Preferably, in step S3, the length of the feeding pipe and the flow rate of the raw material are adjusted to ensure that the raw material is heated in the buffer chamber for not less than 5 minutes.

Preferably, in step S5, an infusion pump is disposed between the return inlet and the return outlet to assist the liquid in the separation tank to return.

Preferably, in step S6, the length of the cooling jacket and the flow rate of the discharged material in the discharging cylinder are adjusted to ensure that the cooling time of the discharged material is not less than 7 minutes.

Compared with the prior art, the invention has the beneficial effects that: the method utilizes cold water to cool the discharged materials after reaction, the cold water absorbs heat in the cooling process, the water is used as a medium to absorb the heat of the discharged materials to preheat the raw materials, and the energy in the process is fully utilized, so that the energy consumption of the system is effectively reduced, and the method is more environment-friendly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the feed box structure of the present invention;

FIG. 3 is a schematic view of a cooling sleeve of the present invention;

reference numbers in the figures: 1. a depropanizer; 11. a first feed port; 12. a first discharge port; 13. a reflux inlet; 14. a first discharge port; 2. a feeding box; 21. a buffer chamber; 22. a feed conduit; 23. a first water inlet; 24. a first water outlet; 3. a separation tank; 31. a second feed port; 32. a second discharge opening; 33. a return outlet; 4. a discharge cylinder; 5. cooling the sleeve; 51. a second water inlet; 52. a second water outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-3, the present invention provides a technical solution: a depropanization device comprises a depropanization tower 1, a feeding box 2, a separation box 3 and a discharging cylinder 4, wherein the depropanization tower 1 is provided with a first feeding hole 11, a first discharging hole 12, a reflux inlet 13 and a first discharging hole 14, the first feeding hole 11 is connected with the feeding box 2 through a pipeline, and the first discharging hole 14 is connected with the discharging cylinder 4; the separation box 3 is provided with a second feed port 31, a second discharge port 32 and a backflow outlet 33, the first discharge port 12 is connected with the second feed port 31, and the backflow inlet 13 is connected with the backflow outlet 33; a cooling sleeve 5 is arranged on the outer side of the discharge cylinder 4, and the cooling sleeve 5 is connected with the feeding box 2; the inside buffer chamber 21 that is provided with of feed box 2, be provided with charge-in pipeline 22 in the buffer chamber 21, charge-in pipeline 22 and first feed inlet 11 interconnect.

Further, the feeding pipe 22 is a spiral structure and is arranged along the length direction of the buffer cavity 21; the feeding box 2 is provided with a first water inlet 23 and a first water outlet 24, the cooling sleeve 5 is provided with a second water inlet 51 and a second water outlet 52, and the first water inlet 23 is communicated with the second water outlet 52.

Further, the cooling sleeve 5 is annular, and two ends of the cooling sleeve are sleeved outside the discharge cylinder 4; and a closed cooling chamber is arranged between the cooling sleeve 5 and the discharge cylinder 4.

Further, the invention also provides a using method of the depropanization device, which comprises the following steps:

s1: feed line 22;

s2: the buffer cavity 21 is communicated with the cooling sleeve 5, and hot water is added into the buffer cavity 21;

s3: the raw material is heated in the buffer cavity 21 and enters the depropanization tower 1 for depropanization operation;

s4: the raw material after propane removal is discharged from the first discharge port 12 and enters the separation box 3 for gas-liquid separation;

s5: the gas is discharged through the second discharge port 32 to proceed the next process, and the liquid flows back into the depropanizer 1 through the reflux outlet 33;

s6: the first discharge port 14 discharges processing waste, the processing waste enters the discharge cylinder 4 and is cooled under the action of the cooling sleeve 5, and after cooling, the raw materials are discharged and recycled in the next procedure;

s7: the process loops through steps S1 to S6.

Further, in step S2, a liquid level sensor and a temperature sensor are disposed in the buffer chamber 21 to ensure that the water level in the buffer chamber 21 is over the feeding pipe 22 and that the temperature is not lower than 65 ℃.

Further, in step S3, the length of the feeding pipe 22 and the flow rate of the raw material are adjusted to ensure that the raw material is heated in the buffer chamber 21 for not less than 5 minutes.

Further, in step S5, an infusion pump is provided between the return inlet 13 and the return outlet 33 to assist the liquid in the separation tank 3 to flow back.

Further, in step S6, the length of the cooling sleeve 5 and the flow rate of the discharged material in the discharging cylinder 4 are adjusted to ensure that the cooling time of the discharged material is not less than 7 minutes.

The working principle is as follows: when in use, raw materials enter the depropanizing tower 1 through the feeding pipeline 22 to perform depropanizing operation, the depropanized finished product materials are discharged through the first discharge port 12 and enter the separation box 3 to perform gas-liquid separation, and waste materials are discharged through the first discharge port 14, are uniformly discharged through the discharge cylinder 4 and enter the next process.

In the process, the raw materials are heated and buffered in the feeding pipeline 22, the waste materials are cooled in the discharging cylinder 4, the heated cooling water in the cooling sleeve 5 is conveyed into the feeding cylinder 2 through the pipeline so as to be heated, the energy in the process is fully utilized, and the energy consumption of the whole system is reduced.

A liquid level sensor and a temperature sensor are arranged in the buffer cavity 21 to ensure the water temperature and the water level in the buffer cavity 21, so that the feeding pipeline 22 can be fully heated; meanwhile, the length of the feeding pipeline 22 and the flow rate of the raw materials are adjusted to ensure the heating time and further ensure the final heating effect. In the same way, the length of the cooling sleeve 5 and the flow rate of the discharged material in the discharging cylinder 4 are adjusted and adjusted, so that the cooling effect of the waste material is ensured.

An infusion pump is provided between the return inlet 13 and the return outlet 33, the infusion pump powering the return of liquid. The separation box 3 receives the finished product discharged from the first discharge port 12, performs gas-liquid separation on the finished product, performs backflow on the raw material which is not completely depropanized, ensures the processing degree of final depropanization, and ensures the purity of the obtained product.

The cooling and heating processes are repeated, and the process is matched with the work of the depropanizer 1 to form a dynamic circulation process, so as to obtain a stable processing product.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A depropanization device is characterized in that: the device comprises a depropanizing tower (1), a feeding box (2), a separating box (3) and a discharging cylinder (4), wherein the depropanizing tower (1) is provided with a first feeding hole (11), a first discharging hole (12), a backflow inlet (13) and a first discharging hole (14), the first feeding hole (11) is connected with the feeding box (2) through a pipeline, and the first discharging hole (14) is connected with the discharging cylinder (4); the separation box (3) is provided with a second feeding hole (31), a second discharging hole (32) and a backflow outlet (33), the first discharging hole (12) is connected with the second feeding hole (31), and the backflow inlet (13) is connected with the backflow outlet (33); a cooling sleeve (5) is arranged on the outer side of the discharge cylinder (4), and the cooling sleeve (5) is connected with the feeding box (2); the feeding box (2) is internally provided with a buffer cavity (21), a feeding pipeline (22) is arranged in the buffer cavity (21), and the feeding pipeline (22) is connected with the first feeding hole (11) in an interconnecting mode.

2. The depropanizer according to claim 1, wherein: the feeding pipeline (22) is of a spiral structure and is arranged along the length direction of the buffer cavity (21); the feeding box (2) is provided with a first water inlet (23) and a first water outlet (24), the cooling sleeve (5) is provided with a second water inlet (51) and a second water outlet (52), and the first water inlet (23) is communicated with the second water outlet (52).

3. The depropanizer according to claim 1, wherein: the cooling sleeve (5) is annular, and two ends of the cooling sleeve are sleeved outside the discharge cylinder (4); and a closed cooling chamber is arranged between the cooling sleeve (5) and the discharge cylinder (4).

4. The use method of the depropanizer according to any one of claims 1 to 3, wherein: the method comprises the following steps:

s1: a feed line (22) for the feedstock;

s2: the buffer cavity (21) is communicated with the cooling sleeve (5), and hot water is added into the buffer cavity (21);

s3: the raw materials are heated in the buffer cavity (21) and then enter the depropanization tower (1) for depropanization operation;

s4: the raw material after propane removal is discharged from the first discharge hole (12) and enters the separation box (3) for gas-liquid separation;

s5: the gas is discharged through a second discharge port (32) to carry out the next process, and the liquid reflows into the depropanizer (1) through a reflux outlet (33);

s6: the first discharge port (14) discharges processing waste, the processing waste enters the discharge cylinder (4), is cooled under the action of the cooling sleeve (5), and the cooled raw materials are discharged for recycling in the next process;

s7: the process loops through steps S1 to S6.

5. The use method of the depropanizer according to claim 4, wherein: in the step S2, a liquid level sensor and a temperature sensor are arranged in the buffer cavity (21) to ensure that the water level in the buffer cavity (21) is higher than the feed pipeline (22) and the temperature is not lower than 65 ℃.

6. The use method of the depropanizer according to claim 4, wherein: in the step S3, the length of the feeding pipeline (22) and the flow rate of the raw material are adjusted to ensure that the raw material is heated in the buffer cavity (21) for not less than 5 minutes.

7. The use method of the depropanizer according to claim 4, wherein: in the step S5, an infusion pump is arranged between the backflow inlet (13) and the backflow outlet (33) to assist the liquid in the separation box (3) to flow back.

8. The use method of the depropanizer according to claim 4, wherein: in the step S6, the length of the cooling sleeve (5) and the flow rate of the discharged material in the discharging cylinder (4) are adjusted to ensure that the cooling time of the discharged material is not less than 7 minutes.