CN214050508U

CN214050508U - Rectifying device for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas

Info

Publication number: CN214050508U
Application number: CN202023105879.6U
Authority: CN
Inventors: 华祥斌; 刘志强; 林百志; 黄斌斌
Original assignee: Fujian Deer Technology Corp
Current assignee: Fujian Deer Technology Corp
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-27
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a rectifying device for electronic grade hexafluoroethane of industrial waste gas recovery purification, include: the tower top condenser, refined section, tower cauldron reboiler, the one end of refined section is connected with the tower top condenser, and the other end communicates with each other with tower cauldron reboiler, tower cauldron reboiler includes the reboiling room, be provided with heat transfer coil pipe in the reboiling room, heat transfer coil pipe's feed liquor side is fixed with a tube sheet, the outside of tube sheet be provided with reboiling room swing joint's ring flange, with heat transfer coil pipe welding on the tube sheet to let the ring flange with the tube sheet locking in the reboiling room, can appear the crack at heat transfer coil pipe and need overhaul when, can wholly take out heat transfer coil pipe, detect, restore crack position, greatly shorten repair time, thereby avoided directly carrying out the shutoff to heat transfer coil pipe's crack and reducing heat transfer area's the condition, can let heat transfer coil pipe heat exchange efficiency after the restoration still, rectification efficiency is not influenced.

Description

Rectifying device for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas

Technical Field

The utility model relates to an electronic grade hexafluoroethane is with purification device, especially a rectifying device for electronic grade hexafluoroethane of industrial waste gas recovery purification.

Background

In the production method for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas produced in carbon tetrafluoride production, a rectifying tower used for purifying hexafluoroethane is an integrated rectifying device formed by combining a filler rectifying tower, a tower top condenser, a tower kettle reboiler and the like.

Traditional reboiler is horizontal U type tubular heat exchanger, and heat transfer heat exchange coil is the integral type in traditional reboiler, if the phenomenon of heat transfer heat exchange coil perforation, seepage appears in the operation process, can only follow heat exchange tube head shutoff heat exchange tube, and the unable processing of demolising of heat transfer U type pipe is big to the production influence, has had fenestrate heat transfer U type pipe solution problem through the shutoff in addition, has less heat transfer area, must cause heat transfer area's not enough.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rectifying device for industrial waste gas recovery purification electronic grade hexafluoroethane can effectively solve above-mentioned problem.

The utility model discloses a realize like this:

a rectifying device for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas comprises: a tower top condenser, a refining section and a tower kettle reboiler, wherein one end of the refining section is connected with the tower top condenser, the other end is communicated with the tower kettle reboiler,

the tower kettle reboiler comprises a reboiling chamber, a heat exchange coil is arranged in the reboiling chamber, a pipe plate is fixed on the liquid inlet side of the heat exchange coil, and a flange plate movably connected with the reboiling chamber is arranged on the outer side of the pipe plate.

As a further improvement, a plurality of helicoids are welded on the flange plate, a plurality of turnbuckles are welded on the reboiling chamber, and the helicoids and the turnbuckles are connected together through screws.

As a further improvement, the flange plate is provided with a heat medium liquid inlet and a heat medium liquid outlet, and the heat medium liquid inlet and the heat medium liquid outlet are respectively connected with the liquid inlet end and the liquid outlet end of the heat exchange coil.

As a further improvement, a precooler is arranged at the bottom inside the tower top condenser.

As a further improvement, the precooler comprises a circulation pipe communicated with the tower top condenser, and a plurality of gas conveying pipes communicated with the refining section are arranged on the inner side of the circulation pipe.

As a further improvement, a safety valve is arranged on the reboiling chamber.

As a further improvement, a waste material valve is welded at the bottom of the reboiling chamber.

The utility model has the advantages that:

1. the utility model discloses with heat exchange coil pipe welding on the tube sheet to let the ring flange with tube sheet locking in the reboiling room, can appear the crack at heat exchange coil pipe when needing to overhaul, can wholly take out heat exchange coil pipe, detect, restore crack position, greatly shorten the repair time, thereby avoided directly carrying out the shutoff to heat exchange coil pipe's crack and reducing heat transfer area's the condition, can let heat exchange coil pipe heat exchange efficiency after the restoration still, rectification efficiency is not influenced.

2. The utility model discloses the precooler that can set up can insert the refrigerant export of top of the tower condenser with the runner pipe, utilizes the waste heat of refrigerant, carries out the precooling to the overhead gas, makes cold volume utilization ratio can reach the biggest, reduces the energy consumption of top of the tower condenser.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a rectification device for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas.

Fig. 2 is a schematic structural diagram of a tower kettle reboiler according to an embodiment of the present invention.

Fig. 3 is a partially enlarged view of a in fig. 2.

Fig. 4 is a schematic structural diagram of a precooler according to an embodiment of the present invention.

In the figure: 51; a tower top condenser,

52; a refining section,

53; a tower kettle reboiler 531; a flange plate 532; heat exchange coil pipes 533; a reboiling chamber,

534 of the content of the plant; a safety valve 535; a waste material valve,

311; a heating medium inlet 312; a heating medium outlet 313; a spiral coil,

331; a threaded sleeve 332; a screw rod,

511; a precooler, 111; gas delivery pipes 112; and (4) a circulating pipe.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1-4, a rectification device for recovering and purifying electronic grade hexafluoroethane from industrial waste gas comprises: an overhead condenser 51, a refining section 52 and a tower kettle reboiler 53, wherein one end of the refining section 52 is connected with the overhead condenser 51, the other end is communicated with the tower kettle reboiler 53,

the tower reboiler 53 comprises a reboiling chamber 533, a heat exchange coil 532 is arranged in the reboiling chamber 533, a pipe plate 321 is fixed on the liquid inlet side of the heat exchange coil 532, a flange 531 movably connected with a reboiling chamber 533 is arranged on the outer side of the pipe plate 321, a plurality of helicoids 313 are welded on the flange 531, a plurality of turnbuckles 331 are welded on the reboiling chamber 533, the helicoids 313 and the turnbuckles 331 are connected together through a screw 332, the flange 531 and the reboiler chamber 533 can be connected by the combination of the coil 313, the screw 331 and the screw 332, when the heat exchange coil 532 has cracks, the screw 332 can be taken down, the flange 531 is taken down, the tube plate 321 and the heat exchange coil 532 are taken down, the condition on the heat exchange coil 532 is checked, repair in time, make whole maintenance process convenient more quick, do not influence heat exchange coil 532's heat exchange efficiency after the restoration yet.

Further, a heat medium inlet 311 and a heat medium outlet 312 are arranged on the flange 531, the heat medium inlet 311 and the heat medium outlet 312 are respectively connected with the liquid inlet end and the liquid outlet end of the heat exchange coil 532, heat medium output from the heat medium inlet 311 exchanges heat with the components in the reboiling chamber 533 through the heat exchange coil 532, and then the heat medium is output from the heat medium outlet 312, so that a positive cycle is formed.

Further, a precooler 511 is arranged at the bottom inside the tower top condenser 51, the precooler 511 comprises a circulation pipe 112 communicated with the tower top condenser 51, a plurality of gas conveying pipes 111 communicated with the refining section 52 are arranged on the inner side of the circulation pipe 112, the tower top gas can be precooled by using the residual temperature of the refrigerant, the cold energy of the refrigerant is fully utilized, the efficiency of the tower top condenser 51 is reduced, the gas conveying pipes 111 can be made into different shapes and structures, and a gas conveying structure which is maximally contacted with the precooler 511 is formed.

Further, a safety valve 534 is arranged on the reboiling chamber 533, and the safety valve 534 is a forced pressure relief valve, so that pressure can be timely released after the working pressure of the equipment exceeds a critical value, and the pressure container equipment is protected from overpressure operation.

Further, a waste material valve 535 is welded at the bottom of the reboiling chamber 533, so that waste materials can be discharged in time, and the waste materials are prevented from being accumulated at the bottom of the reboiler to cause loss of heat energy.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rectifying device for recovering and purifying electronic-grade hexafluoroethane from industrial waste gas comprises: an overhead condenser (51), a refining section (52) and a tower kettle reboiler (53), wherein one end of the refining section (52) is connected with the overhead condenser (51), and the other end is communicated with the tower kettle reboiler (53),

the tower kettle reboiler (53) comprises a reboiling chamber (533), a heat exchange coil (532) is arranged in the reboiling chamber (533), a pipe plate (321) is fixed on the liquid inlet side of the heat exchange coil (532), and a flange plate (531) movably connected with the reboiling chamber (533) is arranged on the outer side of the pipe plate (321).

2. The rectification device for the electronic grade hexafluoroethane recovery and purification from industrial waste gas as claimed in claim 1, wherein a plurality of coils (313) are welded on said flange plate (531), a plurality of screw sleeves (331) are welded on said reboiling chamber (533), and said coils (313) and screw sleeves (331) are connected together by screw rods (332).

3. The rectification device for recovering and purifying electronic-grade hexafluoroethane as claimed in claim 2, wherein the flange (531) is provided with a heat medium inlet (311) and a heat medium outlet (312), and the heat medium inlet (311) and the heat medium outlet (312) are respectively connected with the inlet end and the outlet end of the heat exchange coil (532).

4. The rectification device for recovering and purifying electronic-grade hexafluoroethane as claimed in claim 1, wherein a precooler (511) is arranged at the bottom inside the tower top condenser (51).

5. The rectification device for the electronic-grade hexafluoroethane recovery and purification of industrial waste gas according to claim 4, wherein the precooler (511) comprises a flow pipe (112) communicated with the overhead condenser (51), and a plurality of gas conveying pipes (111) communicated with the refining section (52) are arranged on the inner side of the flow pipe (112).

6. The rectification device for recovering and purifying electronic-grade hexafluoroethane as claimed in claim 1, wherein said reboiling chamber (533) is provided with a safety valve (534).

7. The rectification device for recovering and purifying electronic-grade hexafluoroethane as claimed in claim 1, wherein the bottom of said reboiling chamber (533) is welded with a waste material valve (535).