CN219036294U

CN219036294U - Propylene gas energy-saving replacement device

Info

Publication number: CN219036294U
Application number: CN202223146037.4U
Authority: CN
Inventors: 同辉; 谭宏亮; 王小伟; 廖斌; 刘春明
Original assignee: Shaanxi Runzhong Clean Energy Co ltd
Current assignee: Shaanxi Runzhong Clean Energy Co ltd
Priority date: 2022-11-26
Filing date: 2022-11-26
Publication date: 2023-05-16
Anticipated expiration: 2032-11-26

Abstract

The utility model discloses an energy-saving propylene gas displacement device which comprises a refrigerator, wherein the top input end of the refrigerator is communicated with a propylene gas phase pipeline, the bottom input end of a shell side of the refrigerator is communicated with a mixed gas pipeline, the bottom output end of the refrigerator is connected with a pumping device, the pumping device is also connected with a power gas pipeline, the output pipeline of the pumping device is connected with a silencing device, and the bottom of the silencing device is a low-point liquid outlet. The utility model has the characteristics of high replacement efficiency and greatly improved system recovery efficiency.

Description

Propylene gas energy-saving replacement device

Technical Field

The utility model belongs to the technical field of energy-saving replacement of process gas, and particularly relates to a propylene gas energy-saving replacement device.

Background

At present, the chemical propylene refrigeration system needs to empty and replace nitrogen in the propylene gas phase pipeline medium during the shutdown maintenance and detection. Before the propylene refrigerating system is started, the nitrogen in the gas phase pipeline is replaced by propylene gas, so that the propylene gas content is more than or equal to 95%. In order to avoid a great deal of waste during the propylene gas displacement system, the displacement of the displacement gas is carried out by using a displacement mode of negative pumping pressure according to the actual working condition of a chemical field so as to ensure the propylene purity of a process pipeline.

In the prior art, the project of annual production of 60 ten thousand tons of methanol is realized by using propylene as a medium through a 3MCL607 type centrifugal compressor, and achieving the refrigeration effect through compression, condensation, throttling decompression and evaporation, and the speed is 33000Nm ³ The recycle amount/h supplies cold energy for eluting the low-temperature methanol. When the vehicle is stopped, overhauled and driven, a large amount of replacement gas is wasted in order to ensure the thoroughness and safety of the replacement process, and the vehicle is inconvenient to operate and has low safety.

Disclosure of Invention

In order to overcome the technical problems, the utility model aims to provide the propylene gas energy-saving replacement device which has the characteristics of high replacement efficiency and greatly improves the recovery efficiency of a system.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a propylene gas energy-saving replacement device, includes refrigerator 1, refrigerator 1 top input intercommunication propylene gas phase pipeline, refrigerator 1 shell side bottom input intercommunication gas mixture pipeline, drawing device 3 is connected to the 1 bottom output of refrigerator, still be connected with the power gas pipeline on the drawing device 3, drawing device 3's output pipeline connects silencing device 7, silencing device 7 bottom is the low point leakage fluid dram.

The pumping device 3 comprises a power gas inlet 9, an injection fluid inlet 10, a nozzle 11, a mixing chamber 12, a diffusion chamber 13 and a mixed gas outlet 14;

the power gas inlet 9 is connected with a power gas pipeline, the mixed gas outlet 14 is connected with an output pipeline connected with the silencer 7, the nozzle 11 is arranged in the pumping device 3 at the power gas inlet 9, the rear end of the power gas inlet 9 is provided with a mixing chamber 12 and a diffusion chamber 13 which are sequentially provided with the pumping device 3, the diffusion chamber 13 discharges mixed gas through the mixed gas outlet 14, the mixing chamber 12 is further provided with an injection fluid inlet 10, and the injection fluid inlet 10 is connected with the pipeline of the refrigerator 1.

The diffusion chamber 13 is of a gradual change structure, and the part contacted with the mixing chamber 12 is narrower than the part of the mixed gas outlet 14.

The power gas is 1.3MPa led out of the steam pipe network.

A first discharge valve 2 and a vacuum gauge 4 are arranged on a pipeline between the refrigerator 1 and the pumping device 3.

And a valve I5 and a valve II 6 are arranged on the power gas pipeline.

And a second discharge valve 8 is arranged on the bottom pipeline of the silencing device 7.

The silencer 7 is a porous single-layer silencing and noise-preventing device manufactured by a sleeve, and the multiple holes are uniformly distributed in phi 6 holes.

The utility model has the beneficial effects that:

the device is reasonable in design according to the field working condition, low in investment, small in occupied area and high in replacement efficiency.

The utility model solves the problem of low purification efficiency of the chemical system after propylene gas replacement, and greatly improves the recovery efficiency of the system.

The device accelerates the gas replacement rate of the system through the pumping device, greatly improves the replacement efficiency, has reasonable valve design position and strong operability, and achieves effective discharge through the silencing device.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic structural view of the drawing device.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1: the utility model provides an energy-conserving displacement equipment of propylene gas, includes that 1.3 MPa's drive steam is drawn forth from public works station steam pipe network, and the cold trap 1 gathers the mixed gas that comes from propylene gas, inert gas in the propylene refrigerating system, and the extraction device 3 uses 1.3 MPa's drive steam as power gas, and the mixed gas that the extraction cold trap 1 gathered is discharged through silencing device 7, and the condensate is led to drench from silencing device 7 bottom and is discharged and retrieve.

The mixed gas of the system enters the refrigerator 1 from the system, enters the pumping device 3 through the bottom discharge valve I2, a vacuum gauge 4 is arranged between the pumping device 3 and the refrigerator 1, pumping power is controlled by the valve I5 and the valve II 6, the mixed gas discharged from the pumping device 3 is discharged in the silencing device 7, a low-point liquid outlet is designed at the bottom of the silencing device 7 for preventing liquid impact, and the pumping power is controlled by the discharge valve II 8.

An on-site vacuum gauge 4 is arranged on an evacuating gas pipeline on the evacuating device 3 and is used as an evacuating pressure monitoring gauge. And a silencing device 7 is arranged at the exhaust position of the gas mixture after air extraction.

The power of the pumping device 3 is controlled by using 1.3MPa steam and using double valves (a valve I5 and a valve II 6).

The pumping device 3 is arranged on a platform of equipment of the refrigerator 1, 1.3MPa steam is used as driving steam of the pumping device 3, and an interface of the pumping device is led out from a steam pipeline of a nearby device. The suction side of the suction device 3 is connected to a shower valve (2 inches, 150 lb) at the bottom of the shell side of the cryocooler 1, and the length is 5m.

And the first valve 5 and the second valve 6 are universal gate valves of 300Lb with a size of 1 inch, and are made of a material A105.

As shown in fig. 2: the pumping device 3 comprises a power gas inlet 9, an injection fluid inlet 10, a nozzle 11, a mixing chamber 12, a diffusion chamber 13 and a mixed gas outlet 14;

The drawing device 3 is used for preventing the back flow of the power air pressure, and a single-layer sleeve silencing hole is manufactured to serve as the emptying silencer 7.

The working principle of the utility model is as follows:

1. before the system is vacuumized and replaced, all the gas phase communication valves are all opened, and all the shower guiding and exhausting valves are all closed, so that the system is ensured to be airtight.

2. And slowly opening a power steam main valve on the pipe gallery of the boundary region to perform heating.

3. After the heating pipe is finished, the air extractor is slowly opened to drive the steam valve I5 and the steam valve II 6 to perform heating pipe and condensation, when the temperature of the pipeline is higher than 100 ℃, the valve can be continuously opened, the air extraction side valve 2 is opened, the pressure of the vacuum pressure gauge 4 is observed, and the vacuum extraction pressure is not lower than 0KPa (G).

4. The system gas phase line regulating valve 16 and the manual valves 15, 17 are slowly opened, and the propylene gas phase line is charged with propylene gas. And after the inflation, the pressure is not more than 5-10 KPa, the inflation is stopped, and the sampling analysis is carried out, so that the propylene gas content is more than 95% and is qualified. And if not, continuing vacuumizing and replacing.

5. After the propylene is replaced, the air pumping valve 2 is closed, then the steam valves 5 and 6 of the air extractor are closed, the vacuumizing replacement is finished, and the interfaces of the related pipelines are reset.

Claims

1. The utility model provides a propylene gas energy-saving replacement device, its characterized in that, includes refrigerator (1), refrigerator (1) top input intercommunication propylene gas phase pipeline, refrigerator (1) shell side bottom input intercommunication gas mixture pipeline, extraction device (3) are connected to refrigerator (1) bottom output, still be connected with power air pipe on extraction device (3), the output pipeline of extraction device (3) is connected silencing device (7), silencing device (7) bottom is the low point leakage fluid dram.

2. A propylene gas energy-saving displacement device according to claim 1, wherein the pumping device (3) comprises a motive gas inlet (9), an injection fluid inlet (10), a nozzle (11), a mixing chamber (12), a diffusion chamber (13) and a mixed gas outlet (14);

the utility model discloses a cryogenic refrigerator, including power gas inlet (9), mixing chamber (12), diffusion room (13), mixing chamber (12) and ejector fluid inlet (10), ejector fluid inlet (10) are provided with, mixing chamber (12) and ejector fluid inlet (10) are connected the pipeline of cryogenic refrigerator (1), mixing chamber (13) are with power gas inlet (9) and power pneumatic pipeline link to each other, and mixing gas outlet (14) are connected, and mixing gas outlet (14) meets with the output pipeline of connecting silencing device (7), and the ejector device (3) internally mounted of power gas inlet (9) department has nozzle (11), and mixing chamber (12) and diffusion room (13) for drawing device (3) in proper order to the rear end.

3. A propylene gas energy conservation displacement device according to claim 2, characterized in that the diffusion chamber (13) is of a gradual configuration, the portion in contact with the mixing chamber (12) being narrower than the portion of the mixture outlet (14).

4. The propylene gas energy-saving replacement device according to claim 1, wherein the power gas is 1.3MPa extracted from a steam pipe network.

5. The propylene energy-saving replacement device according to claim 1, wherein a first discharge valve (2) and a vacuum gauge (4) are arranged on a pipeline between the refrigerator (1) and the pumping device (3).

6. The propylene gas energy-saving replacement device according to claim 1, wherein the valve one (5) and the valve two (6) are arranged on the power gas pipeline.

7. The propylene energy-saving replacement device according to claim 1, wherein a second discharge valve (8) is arranged on a bottom pipeline of the silencing device (7).

8. The propylene energy-saving replacement device according to claim 1, wherein the silencing device (7) is a porous single-layer silencing and noise-preventing device manufactured by using a sleeve, and the pores are uniformly distributed in phi 6 holes.