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Name: Wuxi Yu Wei Petrochemical Equipment Co., Ltd.

Contact: Ding Hongwei

Mobile: 18921283376/13771155139

Tel / Fax 0510 -85,957,685

QQ: 1169230448

Website: www.yuweish.com

E-mail：d.hwdhw@163.com

Address: Wuxi City Binhu Town

Contact: Ding Hongwei

Mobile: 18921283376/13771155139

Tel / Fax 0510 -85,957,685

QQ: 1169230448

Website: www.yuweish.com

E-mail：d.hwdhw@163.com

Address: Wuxi City Binhu Town

Ammonia storage tank | ||||||||||||||||||||||||||||||||||||||||||||||

Ammonia storage tank design Known parameters: Maximum temperature: T = 50 ℃ Nominal diameter: DN = 3000mm Barrel length: L = 4500mm Process to determine the size Volume of the tank Barrel length: L = 4500mm nominal diameter: DN = 3000mm The volume of the cylindrical drum is: (1.1) The total surface area of the inner cylinder: (1.2) Head wall thickness of 22mm, then take a straight edge height is 50mm. By the look-up table The head of the total volume: The surface area of a single head: Head of the total internal surface area is: The total volume of the cylinder is: V = The total surface area of the cylinder: Aspect ratio: (1.3) Process calculation Cylinder wall thickness calculation According to the formula: (2.1) Where: - calculated pressure cylinder, MPa; - Inner diameter of the cylinder, mm; - Plate in the design temperature t under the allowable stress, MPa; - Weld joint factor, ≤ 1; In the design temperature of 50 ℃, when the saturated vapor pressure of ammonia (absolute pressure), Table tank pressure:, Safety valve on the container when taking the design pressure of 1.05 to 1.1 for the maximum working pressure. I.e.: P = 1.1 16MnR 40 ℃ when the allowable pressure: (see table) Nominal diameter Di = 3000mm (Double-sided butt welds, 100% testing, see Table) Because ammonia has a certain resistance, therefore a single etching, taking
Then calculate the wall thickness of the cylinder After the round, the nominal thickness of the cylinder is δ Head wall thickness calculation The design uses a standard elliptical head (2:1) ie: K (shape factor) = 1.0. According to the formula, the design of the head thickness is: (2.2) Lookup: Take negative deviation steel, The wall thickness of the cylinder is calculated as: In the above formula (Maximum width of steel due to 3m, this tank diameter of 3000mm so after punching head welding required). Other symbols are the same before. After considering stamping thinning, take the nominal thickness of round steel production 16MnR head. Hydrostatic Test According to the formula is: (2.3) Where: (Look-up table :)
Supports 2.4.1 Bearing selection Carriage for supporting the weight of the container, the container and the container position is fixed in a stable operation. Horizontal cylindrical vessel pedestal into the saddle, seat and leg circles categories. Common horizontal vessels and large horizontal tanks are mostly used saddle. Mainly due to the saddle bearing capacity better and smaller local resistance to the cylinder, so the use of the saddle. Saddles are divided into light (A) and heavy (B) two categories, each form is divided into fixed bearing saddle (F) and the sliding bearing (S), F-type and S on a container type is always paired. The design of the tank volume is small and since the aspect ratio is small, the double-saddle type A, in which one type to the other is S-F. 2.4.2 Calculation of the saddle First estimates saddle load. The total mass of the tank: Where: m1 is the cylinder mass (kg), m2 is head mass (kg), m3 of liquid ammonia mass (kg), m4 as an attachment mass (kg). Cylinder of mass m1 DN = 3000mm, the tube section, the mass per meter of 1640kg (look-up table 4 too) Therefore Head of mass m2 DN = 3000mm, straight edge height h = 50mm in standard oval head, its quality is 1780kg (look-up table 6), Therefore Ammonia mass m3
In the above formula: For loading coefficient, 0.7; V is the tank volume, V = 39.58m3 Liquid ammonia at-200C when the density of 665kg/m3. Therefore: 18424.5kg Quality accessories: Manhole weighing about 200kg, total weight about other interfaces tube 350kg. Then: m4 = 550kg After the above calculated:
Table 3.1 A series of parameter type bearing size
Ammonia storage tank design Known parameters: Maximum temperature: T = 50 ℃ Nominal diameter: DN = 3000mm Barrel length: L = 4500mm Process to determine the size Volume of the tank Barrel length: L = 4500mm nominal diameter: DN = 3000mm The volume of the cylindrical drum is: (1.1) The total surface area of the inner cylinder: (1.2) Head wall thickness of 22mm, then take a straight edge height is 50mm. By the look-up table The head of the total volume: The surface area of a single head: Head of the total internal surface area is: The total volume of the cylinder is: V = The total surface area of the cylinder: Aspect ratio: (1.3) Process calculation Cylinder wall thickness calculation According to the formula: (2.1) Where: - calculated pressure cylinder, MPa; - Inner diameter of the cylinder, mm; - Plate in the design temperature t under the allowable stress, MPa; - Weld joint factor, ≤ 1; In the design temperature of 50 ℃, when the saturated vapor pressure of ammonia (absolute pressure), Table tank pressure:, Safety valve on the container when taking the design pressure of 1.05 to 1.1 for the maximum working pressure. I.e.: P = 1.1 16MnR 40 ℃ when the allowable pressure: (see table) Nominal diameter Di = 3000mm (Double-sided butt welds, 100% testing, see Table) Because ammonia has a certain resistance, therefore a single etching, taking
Then calculate the wall thickness of the cylinder After the round, the nominal thickness of the cylinder is δ Head wall thickness calculation The design uses a standard elliptical head (2:1) ie: K (shape factor) = 1.0. According to the formula, the design of the head thickness is: (2.2) Lookup: Take negative deviation steel, The wall thickness of the cylinder is calculated as: In the above formula (Maximum width of steel due to 3m, this tank diameter of 3000mm so after punching head welding required). Other symbols are the same before. After considering stamping thinning, take the nominal thickness of round steel production 16MnR head. Hydrostatic Test According to the formula is: (2.3) Where: (Look-up table :)
Supports 2.4.1 Bearing selection Carriage for supporting the weight of the container, the container and the container position is fixed in a stable operation. Horizontal cylindrical vessel pedestal into the saddle, seat and leg circles categories. Common horizontal vessels and large horizontal tanks are mostly used saddle. Mainly due to the saddle bearing capacity better and smaller local resistance to the cylinder, so the use of the saddle. Saddles are divided into light (A) and heavy (B) two categories, each form is divided into fixed bearing saddle (F) and the sliding bearing (S), F-type and S on a container type is always paired. The design of the tank volume is small and since the aspect ratio is small, the double-saddle type A, in which one type to the other is S-F. 2.4.2 Calculation of the saddle First estimates saddle load. The total mass of the tank: Where: m1 is the cylinder mass (kg), m2 is head mass (kg), m3 of liquid ammonia mass (kg), m4 as an attachment mass (kg). Cylinder of mass m1 DN = 3000mm, the tube section, the mass per meter of 1640kg (look-up table 4 too) Therefore Head of mass m2 DN = 3000mm, straight edge height h = 50mm in standard oval head, its quality is 1780kg (look-up table 6), Therefore Ammonia mass m3
In the above formula: For loading coefficient, 0.7; V is the tank volume, V = 39.58m3 Liquid ammonia at-200C when the density of 665kg/m3. Therefore: 18424.5kg Quality accessories: Manhole weighing about 200kg, total weight about other interfaces tube 350kg. Then: m4 = 550kg After the above calculated:
Table 3.1 A series of parameter type bearing size |
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