Cryogenic nitrogen-making dehydrogenation equipment

Abstract

The utility model discloses cryogenic nitrogen production dehydrogenation equipment which comprises an air compressor system, a compressed air purification system is installed on one side of the air compressor system, a PSA adsorption system is installed on the right side of the compressed air purification system, and meanwhile a nitrogen buffer tank is installed on one side of the PSA adsorption system. The nitrogen buffer tank comprises a tank body, a gas inlet pipe is fixedly installed on the upper left side of the tank body, and an exhaust pipe is fixedly installed on the lower right side of the tank body. According to the cryogenic nitrogen production dehydrogenation equipment, the outer side of a nitrogen buffer tank is wrapped with a heat insulation and sun protection assembly, the heat insulation and sun protection assembly is composed of a cooling coil, a heat insulation layer, an isolation cover and a sun protection coating, and heat insulation and explosion protection can be conducted on the nitrogen buffer tank when the nitrogen buffer tank works outdoors in summer; absorption of solar radiation is reduced, the temperature of the tank body is reduced, and the situation that aging of materials of the nitrogen buffer tank is possibly accelerated when the nitrogen buffer tank is exposed to sunlight for a long time can be avoided; this may lead to a decrease in the strength of the tank, a decrease in sealing performance, or other potential damage.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to deep-cold nitrogen-making and dehydrogenation equipment. Background Art

[0002] The PSA nitrogen generator system process is a technology that uses the principle of Pressure Swing Adsorption (PSA) to separate nitrogen from air. The following are the main steps of the general PSA nitrogen generator system process:

[0003] Compressed air: compress the air to a certain pressure through an air compressor;

[0004] Pretreatment: The compressed air passes through the pretreatment system to remove moisture, oil and impurities to protect the subsequent adsorbent;

[0005] Adsorption: The pretreated compressed air enters the PSA adsorption tower, where oxygen and other gas molecules are adsorbed on the adsorbent, while nitrogen is not adsorbed;

[0006] Pressure equalization: During the adsorption process, the pressure in the adsorption tower will gradually increase; in order to maintain the stability of the system, a portion of the nitrogen is used as a pressure equalization gas and enters another adsorption tower through a control valve;

[0007] Desorption: When the adsorbent in the adsorption tower reaches saturation, the adsorbed oxygen and other gas molecules are desorbed from the adsorbent by reducing the pressure or using vacuum extraction;

[0008] Purification and storage: The desorbed oxygen and other gases are purified and discharged into the atmosphere, while the separated nitrogen is stored;

[0009] Nitrogen output: The stored nitrogen is delivered to the application equipment that needs nitrogen through the nitrogen storage tank or directly;

[0010] When storing nitrogen, nitrogen storage tanks or nitrogen buffer tanks are needed. Nitrogen buffer tanks are large in size and are generally installed outdoors. They are easily exposed to sunlight in summer, which can increase the surface temperature of nitrogen buffer tanks. If liquid nitrogen or gaseous nitrogen is stored in the tank, high temperature may increase the pressure of nitrogen. Long-term exposure to sunlight may accelerate the aging of the nitrogen buffer tank's materials, which may lead to reduced strength, reduced sealing performance or other potential damage to the tank.

[0011] When the nitrogen buffer tank is collecting nitrogen, pressure is easily accumulated inside it, causing damage to the nitrogen buffer or leakage of the equipment installed on it. Utility Model Content

[0012] The purpose of the utility model is to provide a cryogenic nitrogen production and dehydrogenation device to solve the defects mentioned in the above background technology.

[0013] To achieve the above object, a cryogenic nitrogen dehydrogenation device is provided, comprising an air compressor system, a compressed air purification system is installed on one side of the air compressor system, a PSA adsorption system is installed on the right side of the compressed air purification system, and a nitrogen buffer tank is installed on one side of the PSA adsorption system;

[0014] The nitrogen buffer tank includes a tank body, and an air inlet pipe is fixedly installed on the upper left side of the tank body, and an exhaust pipe is fixedly installed on the lower right side of the tank body, and a pressure relief assembly is fixedly installed on the exhaust pipe; a heat insulation and sun protection assembly is installed on the outer wall of the tank body, and the heat insulation and sun protection assembly includes a cooling coil, and the outer side of the cooling coil is wrapped with a heat insulation layer, and the outer side of the heat insulation layer is wrapped with an isolation cover, and the outer side of the isolation cover is evenly coated with a layer of sun protection coating;

[0015] The pressure relief assembly comprises a branch pipe, and a punching sheet is installed on the top of the branch pipe, and the surface of the punching sheet covers a fixing seat, and the fixing seat covers the top of the branch pipe and is evenly fixed by multiple groups of bolts.

[0016] Preferably, the heat insulation layer, the isolation cover and the sunscreen coating are arranged in layers from the inside to the outside, and the isolation cover is a cylindrical structure made of asbestos insulation material.

[0017] Preferably, the axial cross-sections of the isolation cover, the heat insulation layer and the tank body are concentric circle structures, and the thickness of the isolation cover is 2 mm, while the thickness of the heat insulation layer is 14 mm.

[0018] Preferably, the exhaust pipe and the pressure relief assembly are combined together to form a "T"-shaped arrangement, and the pressure relief assembly consists of three parts: a branch pipe, a punching sheet and an alarm whistle, while the branch pipe and the fixing seat covering the top thereof are a concentric circle structure.

[0019] Preferably, an exhaust port is provided in the middle of the fixing seat, and the cross-section of the exhaust port is an isosceles trapezoidal shape, and the exhaust port is connected to the air inlet of the alarm whistle.

[0020] Preferably, a positioning groove is provided on the top of the branch pipe, and the positioning groove is adapted to the size of the punching sheet, and the punching sheet is clamped inside the positioning groove.

[0021] Preferably, a ring-shaped mounting opening is provided on the surface of the punching sheet, and the ring-shaped mounting opening is interference-fitted with a ring-shaped sealing gasket, and the sealing gasket is clamped inside the ring-shaped mounting opening and fixed by a fixing seat.

[0022] Preferably, a slot is provided at the bottom of the punching sheet, and the slot and the punching sheet are concentric circle structures, and the end of the punching sheet is fixed to the stress-bearing sheet.

[0023] Preferably, the punch is a detachable structure between the branch pipe and the fixing seat, and a stress-bearing notch is provided on the bottom surface of the punch.

[0024] Preferably, the stress-bearing notch is composed of a group of annular notches and six groups of interconnected "I"-shaped notches, and the stress-bearing notch is arranged in the middle position of the bottom of the punching sheet.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The outside of the nitrogen buffer tank is wrapped with a heat-insulating sunscreen component, which consists of a cooling coil, a heat-insulating layer, an isolation cover and a sunscreen coating. It can insulate the nitrogen buffer tank and prevent it from being exposed to the sun when it is working outdoors in summer. It can reduce the absorption of solar radiation and lower the temperature of the tank body, so as to avoid the nitrogen buffer tank being exposed to the sun for a long time, which may accelerate the aging of the material of the nitrogen buffer tank. This may lead to a decrease in the strength of the tank, a decrease in the sealing performance or other potential damage.

[0027] When the interior of the tank is inflated and pressurized, the punching piece is broken through under the action of the air pressure to relieve the pressure inside the nitrogen buffer tank and avoid damage to the nitrogen buffer tank caused by pressure; the stress-bearing notch is composed of a group of annular notches and six groups of "I"-shaped notches that are connected and arranged. The air pressure impacts on the stress-bearing notch, which is convenient for breaking through the punching piece to relieve the pressure on the nitrogen buffer tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a cryogenic nitrogen dehydrogenation device in the prior art;

[0029] Figure 2 This is a schematic diagram of the nitrogen buffer tank structure of the utility model;

[0030] Figure 3 The utility model structure Figure 2 A is an enlarged structural diagram;

[0031] Figure 4 This is a schematic diagram of the pressure relief component of the utility model structure;

[0032] Figure 5 This is a schematic diagram of the structural punching sheet and its installation structure of the utility model;

[0033] Figure 6 This is a schematic diagram of the punching structure of the utility model;

[0034] Figure 7 This is a schematic diagram of the surface structure of the structural punching sheet of the utility model;

[0035] Figure 8 The utility model structure Figure 7 Schematic diagram of the AA section structure.

[0036] Numbers in the figure: 1. Air compressor system; 2. Compressed air purification system; 3. PSA adsorption system; 4. Nitrogen buffer tank; 41. Tank body; 42. Heat insulation and sun protection assembly; 421. Cooling coil; 422. Heat insulation layer; 423. Isolation cover; 424. Sun protection coating; 43. Exhaust pipe; 44. Pressure relief assembly; 440. Branch pipe; 441. Punch; 442. Fixing seat; 443. Alarm whistle; 444. Positioning groove; 445. Sealing gasket; 446. Exhaust port; 447. Stress-bearing plate; 448. Slot; 449. Stress-bearing notch. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1-8 The utility model provides a cryogenic nitrogen dehydrogenation device, comprising an air compressor system 1, a compressed air purification system 2 is installed on one side of the air compressor system 1, and a PSA adsorption system 3 is installed on the right side of the compressed air purification system 2, and a nitrogen buffer tank 4 is installed on one side of the PSA adsorption system 3;

[0039] The nitrogen buffer tank 4 includes a tank body 41, and an air intake pipe is fixedly installed on the upper left side of the tank body 41, and an exhaust pipe 43 is fixedly installed on the lower right side of the tank body 41, and a pressure relief assembly 44 is fixedly installed on the exhaust pipe 43; a heat insulation sunscreen assembly 42 is installed on the outer wall of the tank body 41, and the heat insulation sunscreen assembly 42 includes a cooling coil 421, and the outer side of the cooling coil 421 is wrapped with a heat insulation layer 422, and the outer side of the heat insulation layer 422 is wrapped with an isolation cover 423, and the outer side of the isolation cover 423 is evenly coated with a sunscreen coating 424;

[0040] The pressure relief assembly 44 includes a branch pipe 440 , and a punching sheet 441 is installed on the top of the branch pipe 440 . Meanwhile, the surface of the punching sheet 441 covers a fixing seat 442 , and the fixing seat 442 covers the top of the branch pipe 440 and is evenly fixed by multiple sets of bolts.

[0041] Working principle: When in use, the outer side of the nitrogen buffer tank 4 is wrapped with a heat-insulating sunscreen component 42, which is composed of a cooling coil 421, a heat-insulating layer 422, an isolation cover 423 and a sunscreen coating 424. It can insulate and protect the nitrogen buffer tank 4 from sunburn when working outdoors in summer; reduce the absorption of solar radiation, lower the temperature of the tank body, and avoid long-term exposure of the nitrogen buffer tank 4 to the sun, which may accelerate the aging of the material of the nitrogen buffer tank; this may lead to a decrease in the strength of the tank, a decrease in the sealing performance or other potential damage.

[0042] As a preferred embodiment, the heat insulating layer 422, the isolation cover 423, and the sunscreen coating 424 are arranged in layers from the inside to the outside, and the isolation cover 423 is a cylindrical structure made of asbestos insulation material.

[0043] like Figure 2-4 As shown: the isolation cover 423 is a cylindrical structure made of asbestos insulation material; the isolation cover 423 is used together with the insulation layer 422 to form an insulation barrier for the nitrogen buffer tank 4, thereby completing the insulation protection work for the nitrogen buffer tank 4.

[0044] As a preferred embodiment, the axial cross-section of the isolation cover 423, the heat insulation layer 422 and the tank body 41 is a concentric circle structure, and the thickness of the isolation cover 423 is 2 mm, while the thickness of the heat insulation layer 422 is 14 mm.

[0045] like Figure 2-3 As shown: the sunscreen coating 424 on the outside of the isolation cover 423 is used to color the buffer tank or apply a reflective coating, which can reduce the absorption of solar radiation and lower the temperature of the tank body; choosing a light color or a highly reflective color can achieve a better effect.

[0046] As a preferred embodiment, the exhaust pipe 43 and the pressure relief assembly 44 are combined together to form a "T" shape, and the pressure relief assembly 44 consists of three parts: a branch pipe 440, a punching sheet 441 and an alarm whistle 443. At the same time, the branch pipe 440 and the fixed seat 442 covering its top are a concentric circle structure.

[0047] like Figure 2-8 As shown: the arrangement of the pressure relief assembly 44, when the interior of the tank body 41 is inflated and pressurized, the punching piece 441 is broken under the action of the air pressure, thereby achieving pressure relief work inside the nitrogen buffer tank 4, thereby preventing the nitrogen buffer tank 4 from being damaged by pressure.

[0048] As a preferred implementation, an exhaust port 446 is opened in the middle of the fixing seat 442 , and the cross-section of the exhaust port 446 is an isosceles trapezoidal shape. Meanwhile, the exhaust port 446 is connected to the air inlet of the alarm whistle 443 .

[0049] A positioning groove 444 is formed at the top of the branch pipe 440 , and the positioning groove 444 matches the size of the punching sheet 441 , while the punching sheet 441 is clamped inside the positioning groove 444 .

[0050] like Figure 5-6 As shown: the positioning groove 444 is provided, and the punching piece 441 can be quickly positioned, installed or disassembled, so as to facilitate the replacement of the punching piece 441;

[0051] As a preferred embodiment, a ring-shaped mounting opening is provided on the surface of the punch 441 , and the ring-shaped mounting opening is interference fit with a ring-shaped sealing gasket 445 , and the sealing gasket 445 is clamped inside the ring-shaped mounting opening and fixed by a fixing seat 442 .

[0052] like Figure 5-6 As shown, when the punching sheet 441 is replaced, the fixing seat 442 is first disassembled, and the force-bearing sheet 447 is held to take out the damaged punching sheet 441 and replace it with a new punching sheet 441.

[0053] As a preferred implementation, a slot 448 is provided at the bottom of the punching piece 441 , and the slot 448 and the punching piece 441 are concentric circles, and the end of the punching piece 441 is fixed to the stress-bearing piece 447 .

[0054] After the air pressure breaks through the punching piece 441, it enters the interior of the alarm whistle 443 through the exhaust port 446. The alarm whistle 443 makes a sound to alert the staff, reminding the on-site staff to repair the equipment as soon as possible.

[0055] As a preferred implementation, the punching piece 441 is a detachable structure between the branch pipe 440 and the fixing seat 442 , and a stress-bearing notch 449 is provided on the bottom surface of the punching piece 441 .

[0056] As a preferred embodiment, the stress-bearing notch 449 is composed of a group of annular notches and six groups of interconnected “I”-shaped notches, and the stress-bearing notch 449 is arranged at the middle position of the bottom of the punch 441 .

[0057] The stress-bearing notch 449 is composed of a group of annular notches and six groups of “I”-shaped notches connected to each other. The air pressure impacts on the stress-bearing notch 449, which facilitates the punching sheet 441 to break through, thereby achieving pressure relief for the nitrogen buffer tank 4.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryogenic nitrogen dehydrogenation device, comprising an air compressor system (1), characterized in that: A compressed air purification system (2) is installed on one side of the air compressor system (1), and a PSA adsorption system (3) is installed on the right side of the compressed air purification system (2), and a nitrogen buffer tank (4) is installed on one side of the PSA adsorption system (3); The nitrogen buffer tank (4) comprises a tank body (41), an air intake pipe is fixedly mounted on the upper left side of the tank body (41), an exhaust pipe (43) is fixedly mounted on the lower right side of the tank body (41), and a pressure relief assembly (44) is fixedly mounted on the exhaust pipe (43); a heat insulation sunscreen assembly (42) is mounted on the outer wall of the tank body (41), the heat insulation sunscreen assembly (42) comprises a cooling coil (421), and the outer side of the cooling coil (421) is wrapped with a heat insulation layer (422), and the outer side of the heat insulation layer (422) is wrapped with an isolation cover (423), and the outer side of the isolation cover (423) is evenly coated with a layer of sunscreen coating (424); The pressure relief assembly (44) includes a branch pipe (440), and a punching sheet (441) is installed on the top of the branch pipe (440). At the same time, the surface of the punching sheet (441) covers a fixing seat (442), and the fixing seat (442) covers the top of the branch pipe (440) and is evenly fixed by multiple groups of bolts.

2. A cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: The heat insulating layer (422), the isolation cover (423), and the sunscreen coating (424) are sequentially arranged in layers from the inside to the outside, and the isolation cover (423) is a cylindrical structure made of asbestos heat insulating material.

3. A cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: The axial cross-section of the isolation cover (423), the heat insulation layer (422) and the tank body (41) is a concentric circle structure, and the thickness of the isolation cover (423) is 2 mm, while the thickness of the heat insulation layer (422) is 14 mm.

4. The cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: The exhaust pipe (43) and the pressure relief assembly (44) are combined together to form a "T"-shaped arrangement, and the pressure relief assembly (44) is composed of three parts: a branch pipe (440), a punching sheet (441) and an alarm whistle (443), and the branch pipe (440) and the fixing seat (442) covering the top thereof are concentric circle structures.

5. The cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: An exhaust port (446) is provided in the middle of the fixing seat (442), and the cross section of the exhaust port (446) is arranged in an isosceles trapezoidal shape. Meanwhile, the exhaust port (446) is connected to the air inlet of the alarm whistle (443).

6. The cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: A positioning groove (444) is provided on the top of the branch pipe (440), and the positioning groove (444) is adapted to the size of the punching sheet (441), and the punching sheet (441) is clamped inside the positioning groove (444).

7. A cryogenic nitrogen production and dehydrogenation equipment according to claim 6, characterized in that: The surface of the punching sheet (441) is provided with an annular mounting opening, and the annular mounting opening is interference-fitted with an annular sealing gasket (445), and the sealing gasket (445) is clamped inside the annular mounting opening and fixed by a fixing seat (442).

8. The cryogenic nitrogen production and dehydrogenation equipment according to claim 1, characterized in that: A slot (448) is provided at the bottom of the punching sheet (441), and the slot (448) and the punching sheet (441) are in a concentric circle structure, and the end of the punching sheet (441) is fixed to the stress-bearing sheet (447).

9. The cryogenic nitrogen production and dehydrogenation equipment according to claim 8, characterized in that: The punching sheet (441) is a detachable structure between the branch pipe (440) and the fixing seat (442), and a stress-bearing notch (449) is provided on the bottom surface of the punching sheet (441).

10. The cryogenic nitrogen production and dehydrogenation equipment according to claim 9, characterized in that: The stress-bearing notch (449) is composed of a group of annular notches and six groups of "I"-shaped notches that are connected and arranged, and the stress-bearing notch (449) is arranged at the middle position of the bottom of the punching sheet (441).

Images