Novel skid-mounted cold box of liquid nitrogen air separation device

Abstract

The utility model relates to a novel skid-mounted cold box of a liquid nitrogen air separation device, which comprises a cold box base and a cold box main body, the cold box main body consists of a main cold box, at least one plate type cold box and an expansion machine cold box, the main cold box is connected with the plate type cold box through a gap bridge, and the expansion machine cold box is positioned on one side of the plate type cold box. And the bottoms of the main cold box, the at least one plate type cold box and the expansion machine cold box are provided with cold box bases, and the bottoms of the cold boxes are overhead, so that the cold box main body can be conveniently moved or installed on site. The device has the advantages of being simple and reasonable in structure, stable in fixation, convenient for modularized transportation and installation, small in occupied area, reliable in quality, short in construction period and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid nitrogen air separation, and relates to a new type of skid-mounted cold box for a liquid nitrogen air separation device. Background Technique

[0002] With the rapid development of the economy, the demand for industries such as petrochemical, steel, energy, and aerospace has further increased. As the raw material source of such industries, the demand for air separation devices is also increasing. At present, users generally require short design and construction cycles and high quality for air separation devices. At present, the cold box of the conventional air separation device is installed on-site after design completion. Due to various reasons, the installation cycle is often long and the installation quality is difficult to control.

[0003] Therefore, a new type of skid-mounted cold box for a liquid nitrogen air separation device is designed to overcome the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and to provide a skid-mounted cold box for an air separation device with a simple and reasonable structure, firm fixation, convenient modular transportation and installation, small floor area, reliable quality, and short construction period. The skid-mounted cold box of the air separation device of the utility model integrates design, manufacturing, installation and other links, and skids equipment, pipelines, cold boxes, brackets, etc.

[0005] The utility model is realized by the following technical solutions: a new type of skid-mounted cold box for a liquid nitrogen air separation device, including a cold box base and a cold box main body. The cold box main body is composed of a main cold box, at least one plate-type cold box, and an expander cold box. Among them, the main cold box and the plate-type cold box are connected by a cross bridge. The expander cold box is located on one side of the plate-type cold box, and a cold box base is installed at the bottom of the main cold box, at least one plate-type cold box, and the expander cold box, so as to lift the bottom of each cold box off the ground, facilitating the on-site movement or installation of the cold box main body.

[0006] Preferably: the main cold box is composed of a cold box body and a tower body arranged inside. The bottom of the tower body is erected in the cold box body through a first container support. The tower body is successively a main condenser-evaporator, a lower tower, and a subcooler from top to bottom. Any one side of the main cold box is provided with a plate-type cold box.

[0007] Preferably: there are 2 plate-type cold boxes, namely a first plate-type cold box and a second plate-type cold box. The two boxes are arranged closely and independently of each other. At least 1 heat exchanger is installed in each of the first plate-type cold box and the second plate-type cold box. The heat exchanger is suspended on the frame section steel of the first plate-type cold box and the second plate-type cold box through a second container support. An expander cold box is closely attached to the outside of any one of the plate-type cold boxes.

[0008] Preferably, the expander cold box consists of an expander cold box body and a pipe system internally connected to the expander, and the expander is placed outside the cold box.

[0009] Preferably, the main cold box, at least one plate-type cold box, and the expander cold box are all composed of columns, crossbeams, diagonal braces, panels, cover plates, and stiffeners. Among them, the columns are installed around, detachable panels are installed between two adjacent columns, a cover plate is covered on the top, and diagonal braces and stiffeners are additionally installed between the detachable panels and the columns.

[0010] Preferably, the cold box bases of the main cold box, at least one plate-type cold box, and the expander cold box are all composed of base support columns and base support feet. The base support columns are respectively installed at the four corners of the cold box, at least one plate-type cold box, and the expander cold box. The base support feet are of a quadrilateral structure and contact the ground to distribute the entire force to the entire quadrilateral surface.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The new skid-mounted cold box of the liquid nitrogen air separation device designed by the present utility model integrates the links of design, manufacturing, installation, etc., greatly reducing the construction period; the level of on-site installation personnel is stable, the construction conditions are good, the supervision is standardized, and the quality is reliable. The skid-mounted cold box of the air separation device only needs to complete the docking after being transported to the site and then can be put into production, greatly reducing the on-site workload. The air separation cold box has a simple structure, a concise pipe system, energy conservation and consumption reduction, and reduces the input cost of the air separation device. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is an explosion diagram of the present utility model. Detailed Embodiments

[0015] To enable those of ordinary skill in the art to more clearly understand the purpose, technical solutions, and advantages of the present utility model, the following further elaborates the present utility model in conjunction with the drawings and embodiments.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", "vertical", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0017] The following will introduce the present utility model in detail with reference to the drawings: As Figure 1-2As shown in the figure, a new type of skid-mounted cold box for a liquid nitrogen air separation unit includes a cold box base 1 and a cold box main body 2. The cold box main body 2 is composed of a main cold box 3, at least one plate-type cold box, and an expander cold box 6. Among them, the main cold box 3 is connected to the plate-type cold box through a crossover. The expander cold box 6 is located on one side of the plate-type cold box. And a cold box base 1 is installed at the bottom of the main cold box 3, at least one plate-type cold box, and the expander cold box 6 to lift the bottoms of each cold box off the ground, facilitating the on-site movement or installation of the cold box main body 2.

[0018] The main cold box 3 is composed of a cold box casing 13 and a tower body arranged inside. The bottom of the tower body is erected in the cold box casing 13 through a first container support 10. The tower body successively includes a main condenser-evaporator 7, a lower column 8, and a subcooler 9 from top to bottom. Any one side of the main cold box 3 has a plate-type cold box placed on it.

[0019] There are 2 plate-type cold boxes, namely a first plate-type cold box 4 and a second plate-type cold box 5. The two boxes are arranged closely and independently of each other. At least 1 heat exchanger 12 is installed in each of the first plate-type cold box 4 and the second plate-type cold box 5. The heat exchanger 12 is suspended on the frame section steel 14 of the first plate-type cold box 4 and the second plate-type cold box 5 through a second container support 15. An expander cold box is closely attached outside any one of the plate-type cold boxes.

[0020] The expander cold box 6 is composed of an expander cold box casing and a pipe system connected to the expander inside. The expander is placed outside the cold box.

[0021] The main cold box 3, at least one plate-type cold box, and the expander cold box are all composed of columns, crossbeams, diagonal braces, a panel 19, a cover plate 20, and stiffeners 18. Among them, the columns are installed around, a detachable panel 19 is installed between two adjacent columns, and a cover plate 20 is covered on the top. Diagonal braces (not shown in the figure) and stiffeners 18 are additionally installed between the detachable panel and the columns.

[0022] The cold box bases 1 of the main cold box 3, at least one plate-type cold box, and the expander cold box are all composed of base support columns 17 and base support feet 16. The base support columns 17 are respectively installed at the four corners of the cold box 3, at least one plate-type cold box, and the expander cold box. Its base support feet 16 are of a quadrilateral structure and contact the ground to distribute the entire force to the entire quadrilateral surface.

[0023] A detachable container transportation support 11 is also provided on the skid-mounted cold box of the present utility model to prevent the container from shaking and shifting during transportation. After being transported to the site, each container transportation support 11 needs to be removed.

[0024] The skid-mounted cold box of the present utility model integrates the design, manufacturing, installation and other links, greatly reducing the construction period of the entire air separation project and having reliable quality. The skid-mounted cold box of the air separation unit only needs to complete the docking after being transported to the site and then can be put into production, greatly reducing the on-site workload. The air separation cold box has a simple structure, a simple pipe system, energy conservation and consumption reduction, and reduces the input cost of the air separation unit.

[0025] Skid-mounted cold box accessories can also be provided on the skid-mounted cold box, which include manholes, perlite discharge ports, cold box safety valves, thermometer flanges, instrument lead-out ports, etc., for convenient use and assembly.

[0026] The specific embodiments described herein are only illustrative of the principles and effects of the present utility model and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A new type of skid-mounted cold box for a liquid nitrogen air separation device, comprising a cold box base and a cold box main body, characterized in that: The cold box body consists of a main cold box, at least one plate-type cold box, and an expander cold box. Among them, the main cold box and the plate-type cold box are connected by a crossover. The expander cold box is located on one side of the plate-type cold box. And a cold box base is installed at the bottom of the main cold box, at least one plate-type cold box, and the expander cold box, to lift the bottom of each cold box off the ground, facilitating the on-site movement or installation of the cold box body.

2. The novel skid-mounted cold box of the liquid nitrogen air separation device according to claim 1, characterized in that: The main cold box consists of a cold box casing and a tower body arranged inside. The bottom of the tower body is erected in the cold box casing through a first container support. The tower body successively includes a main condenser-evaporator, a lower tower, and a subcooler from top to bottom. Any one side of the main cold box has a plate-type cold box placed beside it.

3. The novel nitrogen liquefaction and separation unit skid-mounted cold box according to claim 2, characterized in that: There are 2 plate-type cold boxes, namely a first plate-type cold box and a second plate-type cold box. The two boxes are arranged closely and independently of each other. At least 1 heat exchanger is installed in each of the first plate-type cold box and the second plate-type cold box. The heat exchanger is suspended on the frame section steel of the first plate-type cold box and the second plate-type cold box through a second container support. An expander cold box is closely attached to the outside of any one of the plate-type cold boxes.

4. The novel nitrogen liquefaction and air separation unit skid-mounted cold box according to claim 3, characterized in that: The expander cold box consists of an expander cold box casing and a pipe system inside connected to the expander. The expander is placed outside the cold box.

5. The novel nitrogen liquefaction air separation unit skid-mounted cold box according to claim 1, characterized in that: The main cold box, at least one plate-type cold box, and the expander cold box are all composed of columns, crossbeams, diagonal braces, panels, cover plates, and stiffeners. Among them, the columns are installed around, a detachable panel is installed between two adjacent columns, and a cover plate is placed on the top. Diagonal braces and stiffeners are additionally installed between the detachable panel and the columns.

6. The novel liquid nitrogen air separation unit skid-mounted cold box according to claim 5, characterized in that: The cold box bases of the main cold box, at least one plate-type cold box, and the expander cold box are all composed of base support columns and base support feet. The base support columns are respectively installed at the four corners of the cold box, at least one plate-type cold box, and the expander cold box. Its base support feet are of a quadrilateral structure, which contacts the ground and distributes the entire force to the entire quadrilateral surface.

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