Hot nitrogen pumping and conveying device of nitrogen compressor

Abstract

The invention discloses a nitrogen compressor heat extraction nitrogen conveying device in the technical field of chemical engineering and electric power, comprising: a main conveying pipeline, one end of the main conveying pipeline is connected with an exhaust port of a nitrogen compressor, and the other end of the main conveying pipeline is connected to a low-pressure nitrogen pipe network; one end of the branch conveying pipeline is connected with the main conveying pipeline; one end of the branch conveying pipeline is connected with the main conveying pipeline, the user side is connected with the other end of the branch conveying pipeline, and a check valve and a first shut-off valve are arranged at the end, close to the main conveying pipeline, of the outer side wall of the circumference of the branch conveying pipeline. Part of hot nitrogen is conveyed through the branch conveying pipeline, the hot nitrogen is directly conveyed to the user side to be used, the three-stage cooling and steam heating process is omitted, steam is not used, energy is saved, meanwhile, a steam heater is omitted, and cost is effectively saved.

Description

Technical Field

[0001] The invention relates to the technical fields of chemical industry and electric power, and in particular to a nitrogen compressor heat extraction nitrogen conveying device. Background Art

[0002] The upstream nitrogen enters the nitrogen compressor and is pressurized to 0.6Mpa after three-stage compression. After each stage of compression, it is equipped with a water-cooled heat exchanger for cooling. The nitrogen is cooled to 50°C in the three-stage cooler and the pressurized nitrogen enters the pipeline network. Part of the nitrogen is sent to the user and needs to be heated to 100°C before it can be used.

[0003] The pressurized nitrogen is first cooled down by the three-stage cooler of the nitrogen compressor, and a part of it needs to be heated to 100°C by steam to meet user requirements. This causes a waste of heat in the compressed nitrogen, as well as a waste of heating steam, which increases energy consumption and unnecessary equipment costs. Summary of the invention

[0004] The object of the present invention is to provide a nitrogen compressor heat extraction nitrogen conveying device to solve the problem proposed in the above background technology that the pressurized nitrogen is first cooled by the nitrogen compressor three-stage cooler, and a part of it needs to be steam heated to 100°C to meet user requirements, which causes the waste of heat of the compressed nitrogen, and also wastes heating steam, increases energy consumption, and increases unnecessary equipment costs.

[0005] To achieve the above object, the present invention provides the following technical solution: a nitrogen compressor heat extraction nitrogen delivery device, comprising:

[0006] Nitrogen compressor;

[0007] A main delivery pipeline, one end of which is connected to the exhaust port of the nitrogen compressor, and the other end of which is connected to the low-pressure nitrogen pipeline network;

[0008] a branch delivery pipeline, one end of which is connected to the main delivery pipeline;

[0009] A user end is connected to the other end of the branch transmission pipeline.

[0010] Preferably, a check valve and a first shut-off valve are provided on the circumferential outer wall of the branch delivery pipeline at one end adjacent to the main delivery pipeline, and the first shut-off valve is provided on the side of the check valve away from the main delivery pipeline.

[0011] Preferably, a second shut-off valve is provided on the circumferential outer side wall of the branch delivery pipeline at one end adjacent to the user end.

[0012] Preferably, the branch conveying pipeline includes an inner layer, a heat-insulating layer and an outer layer, the heat-insulating layer is arranged on the circumferential outer side wall of the inner layer, and the outer layer is arranged on the circumferential outer side wall of the heat-insulating layer.

[0013] Preferably, a spoiler is provided on the side wall of the inner cavity of the inner layer, and the spoiler is arranged in a spiral shape.

[0014] Preferably, temperature sensors are provided at the middle end of the inner cavity of the inner layer and at one end adjacent to the user end.

[0015] Preferably, the interior of the spoiler is inlaid with electric heating wires.

[0016] Preferably, a wire passing pipe is provided on the circumferential outer wall side of the outer layer, and the inner cavity of the wire passing pipe is connected with the inner cavity of the inner layer.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the nitrogen compressor heat extraction nitrogen delivery device, by arranging a branch delivery pipeline on the main delivery pipeline, delivers part of the hot nitrogen through the branch delivery pipeline, and directly delivers the hot nitrogen to the user end for use, thereby reducing the three-stage cooling and steam heating process, not using steam, saving energy, and saving a steam heater at the same time, effectively saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the branch delivery pipeline structure of the present invention.

[0020] In the figure: 100 nitrogen compressor, 200 main delivery pipeline, 300 branch delivery pipeline, 301 check valve, 302 first shut-off valve, 303 second shut-off valve, 310 inner layer, 311 spoiler, 320 insulation layer, 330 outer layer, 331 through-line pipeline, 400 user end. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention provides a nitrogen compressor heat extraction nitrogen delivery device, which provides a branch delivery pipeline on the main delivery pipeline, and delivers part of the hot nitrogen through the branch delivery pipeline, and directly delivers the hot nitrogen to the user end for use, thereby reducing the three-stage cooling and steam heating process, not using steam, saving energy, and saving a steam heater, effectively saving costs. Please refer to Figure 1 , including: a nitrogen compressor 100, a main delivery pipeline 200, a branch delivery pipeline 300 and a user end 400;

[0023] See also Figure 1One end of the main delivery pipeline 200 is connected to the exhaust port of the nitrogen compressor 100, and the other end of the main delivery pipeline 200 is connected to the low-pressure nitrogen pipeline network. One end of the branch delivery pipeline 300 is connected to the main delivery pipeline 200, and the user end 400 is connected to the other end of the branch delivery pipeline 300. A check valve 301 and a first shut-off valve 302 are arranged on the circumferential outer wall of the branch delivery pipeline 300 near the end of the main delivery pipeline 200. The first shut-off valve 302 is arranged on the side of the check valve 301 away from the main delivery pipeline 200. A second shut-off valve 303 is arranged on the circumferential outer wall of the branch delivery pipeline 300 near the end of the user end 400. The upstream nitrogen enters the nitrogen compressor 100. The nitrogen is compressed by the three-stage impeller 100 and then transported to the main delivery pipeline 200. One end of the branch delivery pipeline 300 is installed on the circumferential outer wall of the main delivery pipeline 200 through a flange. The inner cavity of the branch delivery pipeline 300 is connected with the inner cavity of the main delivery pipeline 200. The check valve 301 is installed on the circumferential outer wall of the branch delivery pipeline 300 through a flange. The check valve 301 is used to prevent the hot nitrogen from flowing back. The setting of the check valve 301 can ensure that part of the nitrogen inside the main delivery pipeline 200 is transported to the inner cavity of the branch delivery pipeline 300, but the hot nitrogen in the inner cavity of the branch delivery pipeline 300 cannot flow back to the inner cavity of the main delivery pipeline 200. The first shut-off valve 302 is set in the branch delivery pipeline through a flange. The first shut-off valve 302 is installed on the outer circumferential wall of the branch delivery pipeline 300, and the hot nitrogen entering the inner cavity of the branch delivery pipeline 300 is turned on and off by the first shut-off valve 302. The second shut-off valve 303 is installed on the outer circumferential wall of the branch delivery pipeline 300 through a flange plate at one end near the user end 400. The hot nitrogen entering the inner cavity of the branch delivery pipeline 300 is turned on and off by the second shut-off valve 303. The branch delivery pipeline 300 is arranged on the line section of the main delivery pipeline 200 after the nitrogen is pressurized but before it is cooled. Part of the nitrogen that has been pressurized but not cooled enters the inner cavity of the branch delivery pipeline 300. When it is used, the check valve 301, the first shut-off valve 302 and the second shut-off valve 303 are opened, and the nitrogen is pressurized. The machine 100 pressurizes the nitrogen to 0.6Mpa. Part of the pressurized nitrogen is transported to the cooler through the main delivery pipe 200 to be cooled to 50°C. Part of the uncooled nitrogen enters the inner cavity of the branch delivery pipe 300. The nitrogen entering the inner cavity of the branch delivery pipe 300 is sequentially transported to the user end for use through the check valve 301, the first shut-off valve 302 and the second shut-off valve 303. The temperature of the nitrogen entering the inner cavity of the branch delivery pipe 300 is 100°C, and the hot nitrogen can be directly transported to the user end for use, reducing the three-stage cooling and steam heating process, not using steam, saving energy, and saving a steam heater, effectively saving costs;

[0024] See also Figure 1-2The branch delivery pipeline 300 includes an inner layer 310, a thermal insulation layer 320 and an outer layer 330. The thermal insulation layer 320 is arranged on the circumferential outer wall of the inner layer 310, and the outer layer 330 is arranged on the circumferential outer wall of the thermal insulation layer 320. The inner layer 310 is made of a material with low thermal conductivity, and the thermal insulation layer 320 is coated on the circumferential outer wall of the inner layer 310. The thermal insulation layer 320 is made of a thermal insulation material, and the outer layer 330 is coated on the circumferential outer wall of the thermal insulation layer 320. The outer layer 330 is made of a high-strength material. The compressed nitrogen is transported through the inner layer 310, and the thermal insulation layer 320 is used to insulate the nitrogen to avoid the decrease of the nitrogen temperature and to avoid the nitrogen temperature failing to meet the user's use requirements. The outer layer 330 protects the thermal insulation layer 320 and the inner layer 310 to avoid the thermal insulation layer 320 and the inner layer 310 from being damaged by foreign objects, resulting in nitrogen leakage, thereby ensuring the effectiveness of nitrogen delivery;

[0025] See also Figure 1-2 A spoiler 311 is provided on the inner cavity side wall of the inner layer 310. The spoiler 311 is spirally arranged and welded on the inner cavity side wall of the inner layer 310 in a spiral shape. When nitrogen enters the inner cavity of the inner layer 310, the nitrogen is disturbed by the spoiler 311 to avoid the impact of nitrogen turbulence on the inner layer 310 and the damage of the inner layer 310, thereby ensuring the service life of the branch delivery pipeline 300 and effectively ensuring the effectiveness of nitrogen delivery;

[0026] See also Figure 1-2, temperature sensors are provided at the middle end of the inner cavity of the inner layer 310 and at one end adjacent to the user end 400, an electric heating wire is inlaid inside the spoiler 311, a wire-passing pipe 331 is provided on the circumferential outer wall side of the outer layer 330, the inner cavity of the wire-passing pipe 331 is connected with the inner cavity of the inner layer 310, the spoiler 311 is made of a material with high thermal conductivity, and an electric heating wire is inlaid inside the spoiler 311 during the molding process, wire grooves are provided on the inner layer 310 and the insulation layer 320, the wire grooves are connected with the wire-passing pipe 331, the power connection end on the electric heating wire is laid inside the wire groove and passes through the wire-passing pipe 331 to be connected to an external power supply, a relay is connected in series between the power connection end on the electric heating wire and the external power supply, the power supply of the electric heating wire is turned on and off by the relay, the power line and the data line on the temperature sensor are laid in the wire groove and pass through The wire pipe 331 is passed through and connected to an external power supply. The wire pipe 331 is sealed with the wires and data cables to prevent leakage of nitrogen. A controller is arranged on the outside of the outer layer 330. The controller is a PLC controller. The controller is electrically connected to the temperature sensor and the relay respectively. The temperature of the nitrogen in the inner cavity of the inner layer 310 is detected by the temperature sensor and the measurement data is transmitted to the controller in real time. When the nitrogen temperature in the inner cavity of the inner layer 310 is lower than 100°C, the controller controls the relay to connect the power of the electric heating wire, and the electric heating wire is energized to heat the nitrogen entering the inner cavity of the inner layer 310 until the temperature of the nitrogen is heated to 100°C. When the temperature of the nitrogen is heated to 100°C, the controller controls the relay to disconnect the power of the electric heating wire, and the electric heating wire is powered off and stops working, which can effectively ensure the nitrogen temperature at the user end.

[0027] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A nitrogen compressor heat extraction nitrogen delivery device, characterized in that: include: Nitrogen compressor (100); A main delivery pipeline (200), one end of which is connected to the exhaust port of the nitrogen compressor (100), and the other end of which is connected to a low-pressure nitrogen pipeline network; a branch delivery pipeline (300), one end of the branch delivery pipeline (300) being connected to the main delivery pipeline (200); A user end (400), the user end (400) is connected to the other end of the branch transmission pipeline (300).

2. A nitrogen compressor heat extraction nitrogen delivery device according to claim 1, characterized in that: A check valve (301) and a first shut-off valve (302) are provided on the circumferential outer wall of the branch delivery pipeline (300) at one end adjacent to the main delivery pipeline (200), wherein the first shut-off valve (302) is provided on the side of the check valve (301) away from the main delivery pipeline (200).

3. A nitrogen compressor heat extraction nitrogen delivery device according to claim 2, characterized in that: A second shut-off valve (303) is provided on the circumferential outer wall of the branch delivery pipeline (300) at one end adjacent to the user end (400).

4. A nitrogen compressor heat extraction nitrogen delivery device according to claim 3, characterized in that: The branch conveying pipeline (300) comprises an inner layer (310), a heat-insulating layer (320) and an outer layer (330); the heat-insulating layer (320) is arranged on the circumferential outer wall of the inner layer (310), and the outer layer (330) is arranged on the circumferential outer wall of the heat-insulating layer (320).

5. A nitrogen compressor heat extraction nitrogen delivery device according to claim 4, characterized in that: A spoiler (311) is arranged on the inner cavity side wall of the inner layer (310), and the spoiler (311) is arranged in a spiral shape.

6. A nitrogen compressor heat extraction nitrogen delivery device according to claim 5, characterized in that: Temperature sensors are provided at the middle end of the inner cavity of the inner layer (310) and at one end adjacent to the user end (400).

7. A nitrogen compressor heat extraction nitrogen delivery device according to claim 6, characterized in that: The spoiler (311) is inlaid with an electric heating wire.

8. The heat extraction nitrogen delivery device for a nitrogen compressor according to claim 7, characterized in that: A wire passing pipe (331) is provided on the circumferential outer wall side of the outer layer (330), and the inner cavity of the wire passing pipe (331) is connected to the inner cavity of the inner layer (310).

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