CN217661600U

CN217661600U - Formaldehyde distillation column dephlegmator

Info

Publication number: CN217661600U
Application number: CN202221172528.3U
Authority: CN
Inventors: 王世玉; 曹志华
Original assignee: Anhui Uctec New Material Science & Technology Co ltd
Current assignee: Anhui Uctec New Material Science & Technology Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-10-28
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses a formaldehyde distillation column divides condenser relates to the formaldehyde treatment field. The formaldehyde distillation tower divider comprises a barrel, a first tube plate and a second tube plate, wherein the first tube plate and the second tube plate are respectively fixedly connected to the inner sides of the two ends of the barrel; the upper end of the tube plate is fixedly connected with an end enclosure through a connecting piece; the inner wall of the end socket close to the connecting piece is fixed with an annular lining plate which is generally made of corrosion-resistant plastics or rubber, so that the service life of the whole end socket, even the service life of the whole formaldehyde distillation tower dephlegmator is prolonged. The problem of current formaldehyde distillation column dephlegmator inner wall of head be easily corroded and life shortens is solved.

Description

Formaldehyde distillation column dephlegmator

Technical Field

The utility model relates to a formaldehyde treatment technical field specifically is a formaldehyde distillation column dephlegmator.

Background

At present, harmful impurities such as formaldehyde, phenol, COD and the like are removed by a steam stripping method in a distillation process of residual formaldehyde in a coking plant, the treated formaldehyde gas is discharged to a gas system from the top of a dephlegmator of a formaldehyde distillation tower, and formaldehyde wastewater steamed at the bottom of the tower is sent to a biochemical treatment device. And continuously distilling the residual formaldehyde by using steam in a formaldehyde distillation tower dephlegmator, wherein the residual formaldehyde contains a small amount of tar and coke powder, part of steam is used for distilling out light components such as formaldehyde gas, tar and the like in a liquid phase after feeding, other liquid contains a small amount of tar pitch and coke powder, the other liquid passes through a stripping section of the formaldehyde distillation tower dephlegmator and is continuously subjected to gas stripping with the steam layer by layer, and finally qualified distilled formaldehyde wastewater is sent away.

In the current formaldehyde distillation tower dephlegmator, the head of barrel is close to a tube sheet department, before hot gas-liquid mixture gets into the heat exchange tube, often can produce and splash, splashes to the inner wall of head and causes the erosion to the lower part inner wall of head, finally shortens the life of head.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

The inner wall to head among the current formaldehyde distillation column dephlegmator is corroded easily and the problem that life shortens, the utility model provides a formaldehyde distillation column dephlegmator, the interior welt that solid fixed ring cover appears on the inner wall that the head is close to the connecting piece, simple structure, it is convenient to change, has effectively reduced the use cost of whole device.

Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a formaldehyde distillation tower divider comprises a barrel, a first tube plate and a second tube plate, wherein the first tube plate and the second tube plate are fixedly connected to the inner sides of two ends of the barrel respectively; the upper end of the tube plate is fixedly connected with an end enclosure through a connecting piece; the inner wall of the end socket close to the connecting piece is fixed with an annular lining plate which is generally made of corrosion-resistant plastics or rubber, so that the service life of the whole end socket, even the service life of the whole formaldehyde distillation tower dephlegmator is prolonged.

Furthermore, the middle part of the cylinder body is provided with an expansion joint with a ring convex shape so as to offset the thermal stress of the whole cylinder body.

Furthermore, the top of the end socket is fixedly connected with a gas-liquid mixture inlet, the top inlet has high injection efficiency, and the shell pass length of the whole device is fully utilized; the upper part and the lower part of one side of the cylinder body are respectively and fixedly connected with a cooling water outlet and a separation liquid outlet, and the upper part and the lower part of the other side of the cylinder body are respectively and fixedly connected with a gas overflow pipe and a cooling water inlet, so that the heat exchange efficiency is improved.

Still further, the pull rod is also included; baffle plates are fixed on the inner wall of the cylinder between the cooling water outlet and the cooling water inlet in a staggered manner, one end of the pull rod is fixed on the tube plate on the inner side of the cylinder, then the pull rod penetrates through at least 2 baffle plates one by one, and distance tubes for limiting the distance are sleeved among the baffle plates.

Furthermore, the tube bundle structure is a stable structure formed by every three heat exchange tubes.

Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the formaldehyde distillation tower dephlegmator provided by the utility model has the advantages that the sleeve-shaped inner lining plate is fixed on the inner wall of the end socket close to the connecting piece, the structure is simple, the replacement is convenient, and the use cost of the whole device is effectively reduced; the annular convex expansion joint also offsets the thermal stress of the whole cylinder body and also prolongs the service life of the cylinder body.

Drawings

FIG. 1 is a schematic view of a formaldehyde distillation column dephlegmator of the present invention;

FIG. 2 is a schematic view of the top view of the formaldehyde distillation column dephlegmator of the present invention;

fig. 3 is a schematic view of the structure of the tube bundle in the present invention.

In the drawings: 1. sealing the end; 2. a cylinder body; 3. a connecting member; 4. a first tube plate; 5. a second tube plate; 11. a gas-liquid mixture inlet; 12. an inner liner plate; 21. a cooling water outlet; 22. a cooling water inlet; 23. a separation liquid outlet; 24. a heat exchange pipe; 25. a pull rod; 26. a distance tube; 27. a baffle plate; 28. an expansion joint; 29. and a gas overflow pipe.

Detailed Description

The following detailed description of the embodiments of the present invention is provided to help those skilled in the art to more fully, accurately and deeply understand the conception and the technical solution of the present invention, and to help them implement the same, by referring to the accompanying drawings and the description of the embodiments.

Example 1

Referring to fig. 1 and 2, the formaldehyde distillation tower dephlegmator of the embodiment includes a cylinder 2, a first tube plate 4 and a second tube plate 5 which are fixedly connected to the inner sides of two ends of the cylinder 2 respectively, a double-tube-plate structure can ensure the positioning of heat exchange tubes and improve the heat exchange effect, and a plurality of tube bundle structures formed by heat exchange tubes 24 are communicated between the first tube plate 4 and the second tube plate 5; the upper end of the first tube plate 4 is fixedly connected with an end enclosure 1 through a connecting piece 3; an annular lining plate 12 is fixed on the inner wall of the end socket 1 close to the connecting piece 3, and the connecting piece 3 is generally a connecting flange.

In the formaldehyde distillation tower dephlegmator of this embodiment, the lining plate 12 is generally made of corrosion-resistant plastic or rubber, so as to improve the service life of the whole end enclosure 1, even the whole formaldehyde distillation tower dephlegmator.

Example 2

The basic structure of the formaldehyde distillation column dephlegmator in this embodiment is the same as that of embodiment 1, and is different from and improved by that, as shown in fig. 1, the middle part of the cylinder 2 is provided with an expansion joint 28 with a ring convex shape to offset the thermal stress of the whole cylinder 2, i.e. to avoid the influence of thermal expansion and contraction on the cylinder 2.

Example 3

The basic structure of the formaldehyde distillation tower dephlegmator in the embodiment is the same as that of the embodiment 1 or 2, and the difference and improvement lies in that the top of the end socket 1 is fixedly connected with a gas-liquid mixture inlet 11, the top inlet has high injection efficiency, and the shell pass length of the whole device is fully utilized; the upper and lower parts of one side of the cylinder 2 are respectively and fixedly connected with a cooling water outlet 21 and a separation liquid outlet 23, and the upper and lower parts of the other side are respectively and fixedly connected with a gas overflow pipe 29 and a cooling water inlet 22, so that the heat exchange efficiency is improved. Also included are tie rods 25; baffle plates 27 are fixed on the inner wall of the cylinder body 2 between the cooling water outlet 21 and the cooling water inlet 22 in a staggered mode, one end of a pull rod 25 is fixed on a tube plate on the inner side of the cylinder body 2, then the pull rod penetrates through at least 2 baffle plates 27 one by one, distance pipes 26 used for limiting the distance are sleeved among the baffle plates 27, the tail end of the pull rod 25 is fastened on one baffle plate 27 through two nuts, and the heat exchange tubes 24 also penetrate through the baffle plates 27 in sequence to improve the positioning effect of the heat exchange tubes 24. As shown in fig. 3, the tube bundle structure is a stable structure formed by every three heat exchange tubes 24, and has stable structure and stable heat exchange effect.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A formaldehyde distillation column dephlegmator which characterized in that: the tube bundle comprises a barrel (2), a first tube plate (4) and a second tube plate (5) which are fixedly connected to the inner sides of two ends of the barrel (2) respectively, wherein a plurality of tube bundle structures formed by heat exchange tubes (24) are communicated between the first tube plate (4) and the second tube plate (5); the upper end of the tube plate I (4) is fixedly connected with an end enclosure (1) through a connecting piece (3); an annular lining plate (12) is fixed on the inner wall of the seal head (1) close to the connecting piece (3).

2. The formaldehyde distillation column dephlegmator as set forth in claim 1, wherein: the middle part of the cylinder body (2) is provided with an expansion joint (28) with a ring convex shape.

3. The formaldehyde distillation column dephlegmator of claim 1, wherein: the top of the end socket (1) is fixedly connected with a gas-liquid mixture inlet (11); the upper part and the lower part of one side of the cylinder body (2) are respectively and fixedly connected with a cooling water outlet (21) and a separation liquid outlet (23), and the upper part and the lower part of the other side are respectively and fixedly connected with a gas overflow pipe (29) and a cooling water inlet (22).

4. The formaldehyde distillation column dephlegmator of claim 3, wherein: also comprises a pull rod (25); baffle plates (27) are fixed on the inner wall of the cylinder (2) between the cooling water outlet (21) and the cooling water inlet (22) in a staggered manner, one end of a pull rod (25) is fixed on a tube plate on the inner side of the cylinder (2) firstly, then the pull rod penetrates through at least 2 baffle plates (27) one by one, and distance tubes (26) for limiting the distance are sleeved among the baffle plates (27).

5. The formaldehyde distillation column dephlegmator of claim 4, wherein: the tube bundle structure is a stable structure formed by every three heat exchange tubes (24).