CN-224220766-U - Multistage rectifying column for refining yellow phosphorus

CN224220766UCN 224220766 UCN224220766 UCN 224220766UCN-224220766-U

Abstract

The utility model discloses a multistage rectifying tower for refining yellow phosphorus, and relates to the technical field of yellow phosphorus refining. The multistage rectifying tower for refining yellow phosphorus comprises a lower tower body, an installation skirt, a middle tower body, an upper sealing cover and a lower sealing cover, wherein the installation skirt is connected to the bottom end face of the lower tower body, the middle tower body is connected to the top end face of the lower tower body, the lower sealing cover is connected to the inner side of the joint of the lower tower body and the installation skirt and seals the inner side and the inner side, and the upper tower body is connected to the top end face of the middle tower body and is communicated with the inner side of the upper tower body. The multistage rectifying tower for refining yellow phosphorus has the advantages that the distribution cap with the overhead lower part and the densely perforated surface effectively solves the problem of insufficient gas-liquid contact interface and heat exchange area of the traditional tray through a unique structural design, and the overhead lower part of the distribution cap forms an independent steam channel, so that rising steam is pre-dispersed in an overhead space, and then uniformly enters the tray liquid layer through the densely perforated surface.

Inventors

LI JINGANG
Dong Linrui
DUAN YONGGANG
LI YANSHENG
ZHONG JINKUI
ZHANG TIANWEI
Tao Caiwen
YANG YANJUN
JIN BO
MA SHUNLI

Assignees

云南旭东集团有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (5)

1. A multistage rectifying column for refining yellow phosphorus, comprising: The device comprises a lower tower body (1), an installation skirt (2), a middle tower body (3), an upper tower body (4), an upper sealing cover (5) and a lower sealing cover (6), wherein the installation skirt (2) is connected to the bottom end face of the lower tower body (1), the middle tower body (3) is connected to the top end face of the lower tower body (1), the lower sealing cover (6) is connected to the inner side of the joint of the lower tower body (1) and the installation skirt (2) and seals the lower end face and the upper end face, the upper tower body (4) is connected to the top end face of the middle tower body (3) and is communicated with the inner side of the middle tower body, the upper sealing cover (5) is connected to the top end face of the upper tower body (4) and seals the top end face, and an air outlet pipeline (13) communicated with the inner side of the upper sealing cover (5) is connected to the top center of the upper sealing cover; The tower body comprises a reboiling pipe (7), tower tray modules (9) and liquid outlet pipelines (10), wherein a plurality of groups of liquid outlet pipelines (10) which are oppositely arranged and distributed in a staggered manner are integrally formed at the outer wall of the upper tower body (4), a plurality of groups of tower tray modules (9) which correspond to the liquid outlet pipelines (10) in number are arranged in the upper tower body (4), the bottom of the lower sealing cover (6) is detachably connected with the reboiling pipe (7) communicated with the inside of the lower sealing cover, and the reboiling pipe (7) penetrates through the outer wall of the lower tower body (1) to extend to the outside of the lower tower body (1).
2. The multistage rectifying tower for refining yellow phosphorus according to claim 1, wherein the tray module (9) comprises a tray seat (91), communication holes (92), a distribution cap (93) and a flow guide plate (94), a plurality of groups of tray seats (91) are embedded and installed on the inner wall of the upper tower body (4), the tray seats (91) are of a double-layer terrace structure, the surfaces of the tray seats (91) are integrally formed and provided with the communication holes (92) distributed in a plurality of groups, the surfaces of the tray seats (91) are positioned right above the communication holes (92), the distribution cap (93) is detachably installed on the positions, located right above the communication holes (92), of the surfaces of the tray seats (91), the side edges of the tray seats (91) are integrally formed and connected with the flow guide plate (94), the bottom end face of the flow guide plate (94) is provided with a folded corner, an included angle between the tray seat (91) and the flow guide plate (94) is a right angle, and the axis of the liquid outlet pipeline (10) is perpendicular to the surfaces of the flow guide plate (94).
3. The multistage rectifying tower for refining yellow phosphorus according to claim 2, wherein the distribution cap (93) comprises a cap body (931), a notch (932) and heat exchange holes (933), the cap body (931) is of a hollow structure with an opening at the bottom, the notch (932) which is thick and distributed in an annular array is formed in the outer wall of the cap body (931) near the opening at the bottom, and the heat exchange holes (933) which are densely distributed are formed in the outer wall of the cap body (931).
4. The multistage rectifying tower for refining yellow phosphorus according to claim 3, wherein a feeding pipeline (11) and a preheating pipeline (12) which are communicated with the inside of the middle tower body (3) are integrally connected to the middle section of the outer wall of the middle tower body (3), a manhole A (8) which is communicated with the inside of the middle tower body (3) is connected to the position coaxially opposite to the preheating pipeline (12), and a plurality of groups of manholes B (16) which are distributed along the axial direction of the upper tower body (4) are connected to the outer wall of the upper tower body.
5. The multistage rectifying tower for refining yellow phosphorus as claimed in claim 4, wherein the surface of the upper sealing cover (5) is integrally connected with a water inlet pipeline (14) and a water outlet pipeline (15), the upper sealing cover (5) is of a double-layer hollow structure, a heat exchange cavity is formed by the hollow structure in the upper sealing cover (5), and the water inlet pipeline (14) and the water outlet pipeline (15) are communicated with the heat exchange cavity in the upper sealing cover (5).

Description

Multistage rectifying column for refining yellow phosphorus Technical Field The utility model relates to the technical field of yellow phosphorus refining, in particular to a multistage rectifying tower for yellow phosphorus refining. Background In the prior art of a multistage rectifying tower for refining yellow phosphorus, the insufficient gas-liquid contact interface and heat exchange area of a tray are core problems for restricting separation efficiency, the open aperture ratio of a traditional tray such as a float valve tray and a sieve tray is generally low, so that the contact area of steam and liquid is limited, the mass transfer process 4 cannot be fully realized, for example, the float valve spacing and aperture design of the float valve tray are not usually optimized for the high viscosity characteristic of yellow phosphorus, partial gas velocity is easy to be uneven when steam rises, impurities such as arsenide and sulfide in a liquid phase cannot be effectively transferred to a gas phase, the removal effect is finally influenced, in addition, the height of a weir plate and the structural design of a downcomer of the tray are not reasonable, so that the liquid holding capacity on the tray is insufficient or uneven, the gas-liquid contact time is further reduced, for example, after the weir height of the float valve tray is increased from 25mm to 40mm by a certain enterprise, the tower pressure difference is suddenly increased from 10kPa to 20kPa, the energy consumption is doubled, and the separation efficiency is not remarkably improved, and the limitation of the traditional tray in the aspects of balancing mass transfer and pressure drop is exposed. The problem of insufficient heat exchange area is also remarkable, yellow phosphorus refining is carried out at a high temperature of 200-300 ℃ generally, the structural design of the existing tray cannot fully utilize the space in the tower to strengthen heat transfer, for example, a floating valve of a floating valve tray only provides limited gas-liquid contact points, the flow path of liquid on the tray is short and single, the heat exchange efficiency is low, the defect is particularly obvious when yellow phosphorus containing high-boiling impurities such as metal salt is treated, the reverse contact of high-temperature steam and the liquid is insufficient, light components cannot be fully vaporized, heavy components are difficult to condense, the purity of yellow phosphorus at the top of the tower is insufficient finally, the impurity residue at the bottom of the tower is high, and in addition, the traditional tray lacks an efficient heat recovery mechanism, more than about 30% of energy consumption is wasted in the rectification process, and the pressure of production cost is increased. Aiming at the problems, partial improvement attempts such as replacing trays with structured packing can improve mass transfer efficiency, but yellow phosphorus is easy to solidify, has strong corrosiveness, is easy to block and difficult to maintain, and is difficult to be widely applied in industry, so that the gas-liquid contact interface and heat exchange area of the trays in the prior art are insufficient, and become key bottlenecks for restricting the development of yellow phosphorus refining to high purity and low energy consumption directions. Disclosure of utility model The utility model aims to provide a multistage rectifying tower for refining yellow phosphorus, which can solve the problems in the prior art. In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a yellow phosphorus is refined with multistage rectifying column, including lower tower body, installation skirt, well tower body, upper seal lid and lower seal lid, the installation skirt is connected in the bottom terminal surface of lower tower body, well tower body is connected in the top terminal surface of lower tower body, the lower seal lid is connected in the inboard of lower tower body and installation skirt junction and is sealed the two, the upper tower body is connected in the top terminal surface of well tower body and communicates with its inside, the upper seal lid is connected in the top terminal surface of upper tower body and is sealed it, the top center department of upper seal lid is connected with the gas outlet pipeline rather than inside intercommunication; The tower body is characterized by further comprising reboiling pipes, tower tray modules and liquid outlet pipelines, wherein a plurality of groups of liquid outlet pipelines which are oppositely arranged and distributed in a staggered manner are integrally formed at the outer wall of the upper tower body, a plurality of groups of tower tray modules which correspond to the liquid outlet pipelines in number are arranged in the upper tower body, the bottom of the lower sealing cover is detachably connected with the reboiling pipes comm