Steam recovery device for air separation plant

Abstract

The utility model discloses a steam recovery device for an air separation plant, which comprises a condenser and a water storage cylinder arranged on one side of the condenser, the condenser is connected with the water storage cylinder through a communicating pipe, a top cover plate is arranged at the top of the water storage cylinder, a coiled pipe is arranged in the top cover plate and is of a vortex structure, a protective shell is arranged outside the coiled pipe, and the protective shell is connected with the condenser. Compared with the prior art, the spiral water storage device has the advantages that the spiral pipe is of a spiral structure, so that the occupation of the longitudinal space of the spiral structure is greatly reduced, and a protective shell is arranged outside the spiral pipe, so that the spiral water storage device is convenient to use. A group of supporting blocks are arranged on the inner wall surface of the protective shell in the circumferential direction, and the outermost ring of coiled pipe is lapped on the supporting blocks, so that the coiled pipe is prevented from being exposed outside, the service life is prolonged, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation equipment, in particular to a steam recovery device used for air separation equipment. Background Art

[0002] Air separation equipment is a device that uses air as raw material, converts air into liquid through compression cycle deep freezing, and then gradually separates and produces inert gases such as oxygen, nitrogen and argon from the liquid air through distillation. When the air separation unit is in operation, it needs to use soft water to flush the internal impeller and each molecular sieve. After the flushing is completed, the soft water is heated by its own heating mechanism, so that the soft water containing impurities is converted into water vapor. At the same time, in order to save water resources, these water vapors can be recycled and reused.

[0003] Through patent search, it was found that the Chinese utility model patent with publication number CN213020533U discloses a steam recovery device for air separation equipment. Due to the setting of the coiled pipe, its drainage cross-section is small and it is a surrounding type, which enhances the heat exchange efficiency between the soft water containing high heat inside and the outside. The operation of the cooling fan accelerates the air flow velocity on the coiled pipe, has a cooling effect on the air around the coiled pipe, and accelerates the removal of heat from the surface of the coiled pipe. Therefore, it can effectively reduce the temperature of the soft water discharged into the water inlet of the air separator, which is beneficial to reduce the heat level of the air separator. However, the longitudinally placed coiled pipe occupies a large height space and is exposed to the outside, which poses certain safety hazards. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a steam recovery device for air separation equipment which has reasonable design and long service life.

[0005] The technical solution of the utility model is as follows:

[0006] A steam recovery device for an air separation plant comprises a condenser and a water storage cylinder arranged on one side of the condenser, wherein the condenser and the water storage cylinder are connected via a connecting pipe, a top cover plate is provided on the top of the water storage cylinder, a coiled pipe is provided inside the top cover plate, the coiled pipe has a vortex structure, a protective shell is provided outside the coiled pipe, a water pumping pipe extending into the bottom of the cavity is provided inside the water storage cylinder, and the water pumping pipe is connected to the coiled pipe.

[0007] Furthermore, the protective shell is a cylindrical structure, and a group of support blocks are provided on the inner wall surface of the protective shell along its circumferential direction.

[0008] Furthermore, a group of locking blocks are provided on the lower end surface of the protective shell, and a locking groove matching the size of the locking blocks is opened on the upper surface of the top cover plate, and the protective shell and the top cover plate cooperate with each other through the locking blocks and the locking grooves.

[0009] Furthermore, a water suction connection box is provided at the center of the upper surface of the top cover plate, and the water suction pipe is connected with the coiled pipe through the water suction connection box.

[0010] Furthermore, a plurality of groups of fans distributed in a circular array are arranged at the upper end of the top cover plate and located on the outer ring of the water suction connection box.

[0011] Furthermore, it comprises a support base, which is arranged at the bottom of the condenser and the water storage cylinder, wherein a positioning ring for limiting the water storage cylinder is arranged at the matching position between the support base and the water storage cylinder.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1) Compared with the prior art, the utility model makes the curved pipe into a vortex structure, which greatly reduces the longitudinal space occupied by this part of the structure;

[0014] 2) In the utility model, a protective shell is provided outside the coiled pipe, and a group of support blocks are provided on the inner wall of the protective shell along its circumferential direction. The outermost ring of the coiled pipe is placed on the support blocks, which avoids the coiled pipe being exposed outside, prolongs its service life and improves safety;

[0015] 3) The upper end of the top cover plate of the utility model and the outer ring of the water suction connection box are provided with a plurality of sets of fans distributed in a circular array, so that the airflow in the cavity of the protective fence acts quickly on the coiled pipe, which has a faster heat dissipation effect;

[0016] 4) The device of the utility model has reasonable structural design and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the coiled pipe of the utility model;

[0019] Figure 3 This is a diagram showing the internal structure of the water storage cylinder of the present utility model.

[0020] In the figure: 1. condenser; 2. connecting pipe; 3. water storage cylinder; 4. support base; 10. water suction pipe; 12. top cover plate; 13. positioning top groove; 14. coiled pipe; 16. support block; 17. fan; 18. locking block; 19. locking groove; 20. water suction connection box; 21. protective shell. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings, but the scope of protection of the utility model is not limited to the described scope.

[0022] like Figure 1As shown, a steam recovery device for an air separation device includes a condenser 1 and a water storage cylinder 3 arranged on one side of the condenser 1, the condenser 1 and the water storage cylinder 3 are connected through a connecting pipe 2, the exhaust pipe of the air separation unit heating mechanism discharges water vapor into the condenser 1, and the water vapor is converted into high-temperature liquid soft water through the operation of the condenser 1, and the liquid soft water is discharged into the water storage cylinder 3 through the connecting pipe 2, and a pumping pipe 10 extending to the bottom of the cavity is arranged in the water storage cylinder 3, a top cover plate 12 is arranged on the top of the water storage cylinder 3, a coiled pipe 14 is arranged in the top cover plate 12, and the pumping pipe 10 is connected with the coiled pipe 14, so that the bottom end of the pumping pipe 10 is close to the bottom of the groove of the water storage cylinder 3, so that the soft water can move upward along the pumping pipe 10.

[0023] The coiled pipe 14 has a spiral structure, which greatly reduces the longitudinal space occupied by this part of the structure. A protective shell 21 is provided outside the coiled pipe 14 to avoid the coiled pipe being exposed outside, thereby extending the service life and improving safety.

[0024] In this embodiment, the protective shell 21 is a cylindrical structure. A group of support blocks 16 are provided on the inner wall surface of the protective shell 21 along its circumferential direction. The outermost ring of the coiled pipe 14 is placed on the support blocks 16. The support blocks 16 are used to support the coiled pipe 14 so that the coiled pipe 14 is placed more stably inside the protective shell 21.

[0025] like Figure 2 As shown, a group of locking blocks 18 are provided on the lower end surface of the protective shell 21, and a locking groove 19 matching the size of the locking block 18 is opened on the upper surface of the top cover plate 12. The protective shell 21 and the top cover plate 12 cooperate with each other through the locking block 18 and the locking groove 19. After the protective shell 21 is installed on the top cover plate 12, the locking block 18 extends into the locking groove 19. The locking groove 19 has a built-in lock buckle, which is driven by a spring. After the locking block 18 extends into the locking groove 19, the lock buckle is clamped to the locking block 18 by the spring, so that the protective shell 21 is stably fitted on the top cover plate 12.

[0026] like Figure 3 As shown, a water suction connection box 20 is provided at the center of the upper surface of the top cover plate 12, and the water suction pipe 10 is connected with the coiled pipe 14 through the water suction connection box 20. The water suction pipe 10 discharges soft water into the coiled pipe 14 through the water suction connection box 20. The vortex-shaped coiled pipe 14 allows the soft water to stay at this position for a longer time, and the top cover plate 12 can directly cover the top of the water storage cylinder 3 to complete the closure of the top of the water storage cylinder 3, and a positioning top groove 13 is opened at the bottom of the top cover plate 12. The positioning top groove 13 is used to clamp the top of the water storage cylinder 3 to cover the upper space of the water storage cylinder 3 with the casing.

[0027] A plurality of fans 17 distributed in a circular array are arranged at the upper end of the top cover plate 12 and located on the outer ring of the water suction connection box 20. The airflow generated by the plurality of fans 17 moves upward, accelerating the removal of heat from the surface of the coiled tube 14. Therefore, the temperature of the soft water discharged into the water inlet of the air separator can be effectively reduced, which is beneficial to reducing the heat generated during the operation of the air separator.

[0028] In this embodiment, a support base 4 is also included. The support base 4 is arranged at the bottom of the condenser 1 and the water storage cylinder, wherein a positioning ring for limiting the water storage cylinder 3 is arranged at the matching position between the support base 4 and the water storage cylinder 3.

Claims

1. A steam recovery device for an air separation plant, comprising a condenser (1) and a water storage cylinder (3) arranged on one side of the condenser (1), wherein the condenser (1) and the water storage cylinder (3) are connected via a connecting pipe (2), a top cover plate (12) is arranged on the top of the water storage cylinder (3), and a coiled pipe (14) is arranged inside the top cover plate (12), characterized in that The coiled pipe (14) is in a spiral structure, a protective shell (21) is provided outside the coiled pipe (14), a water extraction pipe (10) extending to the bottom of the cavity is provided inside the water storage cylinder (3), and the water extraction pipe (10) is in communication with the coiled pipe (14).

2. A steam recovery device for an air separation plant according to claim 1, characterized in that The protective shell (21) is a cylindrical structure, and a group of support blocks (16) are provided on the inner wall surface of the protective shell (21) along its circumferential direction.

3. A steam recovery device for an air separation plant according to claim 2, characterized in that A group of locking blocks (18) are provided on the lower end surface of the protective shell (21), and a locking groove (19) matching the size of the locking blocks (18) is provided on the upper surface of the top cover plate (12). The protective shell (21) and the top cover plate (12) are matched with each other through the locking blocks (18) and the locking grooves (19).

4. A steam recovery device for an air separation plant according to claim 1, characterized in that A water suction connection box (20) is provided at the center of the upper surface of the top cover plate (12), and the water suction pipe (10) is connected to the coiled pipe (14) through the water suction connection box (20).

5. A steam recovery device for an air separation plant according to claim 4, characterized in that A plurality of groups of fans (17) distributed in a circular array are arranged at the upper end of the top cover plate (12) and located on the outer ring of the water suction connection box (20).

6. A steam recovery device for an air separation plant according to claim 1, characterized in that It comprises a support base (4), wherein the support base (4) is arranged at the bottom of the condenser (1) and the water storage cylinder, wherein a positioning ring for limiting the position of the water storage cylinder (3) is arranged at the matching position between the support base (4) and the water storage cylinder (3).

Images