CN213537768U

CN213537768U - Catalyst efficient drying and activating reactor for chloroethylene synthesis conversion

Info

Publication number: CN213537768U
Application number: CN202022822679.6U
Authority: CN
Inventors: 张文; 李洪川; 颜磊; 刘念; 孙爱荣; 吴让圣; 黄义斌; 黄义军; 李俊松
Original assignee: Hubei Changfa Vessel Manufacturing Co ltd
Current assignee: Hubei Changfa Vessel Manufacturing Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-06-25
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a catalyst high-efficiency drying and activating reactor for chloroethylene synthesis and conversion, which comprises a shell, an upper end enclosure and a lower end enclosure, wherein a gas pipe is vertically arranged in the middle of the inner cavity of the shell, a plurality of heat exchange tubes are filled in a ring cavity formed by enclosing the shell and the gas pipe, the heat exchange tubes are uniformly distributed along the circumference and are staggered and arranged into a plurality of layers along the radial direction, the heat exchange tubes are U-shaped, a plurality of connecting holes are uniformly arranged on the shell, and the U-shaped open ends of the heat exchange tubes are spliced and matched with the connecting holes one; the casing outer weld fixation has the cover that presss from both sides, presss from both sides to be equipped with steam inlet on the cover, and steam inlet intercommunication steam source, steam pass through the connecting hole and circulate between cover and the heat exchange tube, and the casing bottom is equipped with a plurality of nitrogen gas pipelines, and in the nitrogen gas pipeline stretched into casing inner chamber and feed through the gas-supply pipe in order to carry nitrogen gas to the gas-supply pipe, the upper cover top was equipped with the feed inlet, and the low head bottom is equipped with the discharge. The utility model discloses can desorption moisture in the catalyst fast, improve the activity of catalyst, reduce the wasting of resources.

Description

Catalyst efficient drying and activating reactor for chloroethylene synthesis conversion

Technical Field

The utility model relates to a catalyst technical field for the chloroethylene synthesis especially relates to a chloroethylene synthesis conversion is with catalyst high efficiency drying activation reactor.

Background

In the process of producing chloroethylene, a synthesis converter is a key device, the chloroethylene synthesis converter is a large tubular heat exchanger, a tubular is filled with a mercuric chloride catalyst taking active carbon as a carrier, and the mixed gas of acetylene and hydrogen chloride is catalyzed by the catalyst in the tubular to synthesize chloroethylene.

The traditional process adopts nitrogen purging replacement to keep dryness, and then uses hydrogen chloride gas to activate the catalyst, but the hydrogen chloride gas and water molecules can form acid water to cause corrosion of the tube array, when the moisture in the mixed gas is more than 0.06%, the tube array causes severe hydrogen depolarization reaction, so the tube array is seriously corroded to cause mercury chloride sublimation, the catalyst is inactivated, side reaction is large, the production capacity of the converter is reduced, the service cycle and the conversion rate of the catalyst are influenced, the service life of the converter is directly influenced, the tube array space is small, and the drying time is long. Therefore, a device for rapidly removing the water from the catalyst and activating the catalyst is urgently needed.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a chloroethylene is catalyst high efficiency drying activation reactor for synthetic conversion, it has solved the catalyst that exists among the prior art and has dried the space in the tubulation for a short time, and drying time is long, easily causes the problem that the tubulation corrodes.

According to the embodiment of the utility model, the catalyst high-efficiency drying and activating reactor for chloroethylene synthesis and conversion comprises a shell, an upper end socket and a lower end socket, wherein a gas pipe is vertically arranged in the middle of the inner cavity of the shell, the bottom and the top of the gas pipe are both closed, and a plurality of air holes are formed in the pipe wall of the gas pipe;

the shell and the gas pipe are enclosed to form an annular cavity, a plurality of heat exchange tubes are filled in the annular cavity, the heat exchange tubes are uniformly distributed along the circumference and are staggered and arranged in a multilayer manner along the radial direction, the heat exchange tubes are U-shaped, a plurality of connecting holes are uniformly formed in the shell, and the U-shaped open ends of the heat exchange tubes are in one-to-one insertion fit with the connecting holes and are welded and fixed with the shell;

the utility model discloses a heat exchanger, including casing, upper cover, lower head, steam inlet, connecting hole, heat exchange tube, casing bottom are equipped with a plurality of nitrogen gas pipelines, nitrogen gas pipeline stretches into the casing inner chamber and communicates the gas-supply pipe in order to carry nitrogen gas to the gas-supply pipe in, the upper cover top is equipped with the feed inlet, and the lower head bottom is equipped with the discharge gate.

Compared with the prior art, the utility model discloses following beneficial effect has:

through setting up heat exchange tube and clamp cover, the steam source lasts supplies with steam, steam enters into in pressing from both sides the cover from steam inlet, and enter into the heat exchange tube through the connecting hole, the heat exchange tube gives off heat and carries out the drying to the catalyst in the casing, make the hydrone evaporation, realize continuously supplying of nitrogen gas through gas-supply pipe and nitrogen gas pipeline simultaneously, adopt the nitrogen gas of low moisture content rate (containing wet 0.01%) as drying medium, great wet ability of carrying has, this reactor loading capacity is big, and the moisture in the ability quick desorption catalyst, improve the activity of catalyst, thereby further improve the conversion efficiency of the synthetic converter of chloroethylene.

Drawings

Fig. 1 is a schematic view of a main structure of an embodiment of the present invention.

Fig. 2 is a schematic distribution diagram of the heat exchange tubes of the present invention.

Fig. 3 is a schematic view of the installation structure of the middle ring pipe of the present invention.

In the above drawings: 1. a housing; 10. a gas delivery pipe; 11. a heat exchange pipe; 12. a nitrogen gas pipeline; 13. a flow guide pipe; 14. a rib plate; 15. a horizontal plate; 16. flat steel; 17. a gas recovery pipe; 18. an upper cover; 2. an upper end enclosure; 20. a feed inlet; 3. a lower end enclosure; 30. a discharge port; 31. a distribution cone; 32. an acid discharge port; 33. a steam coil; 4. a jacket; 40. a steam inlet; 41. a steam line; 42. a condensate outlet; 5. a ring pipe; 50. a connecting plate; 51. a longitudinal plate; 52. a transverse plate; 53. a circular arc portion.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1, an embodiment of the utility model provides a catalyst high-efficiency drying and activating reactor for chloroethylene synthesis conversion, which comprises a shell 1, an upper end enclosure 2 and a lower end enclosure 3, wherein a gas pipe 10 is vertically arranged in the middle of an inner cavity of the shell 1, the bottom and the top of the gas pipe 10 are both closed, and a plurality of air holes are formed on the pipe wall of the gas pipe 10;

a plurality of heat exchange tubes 11 are filled in an annular cavity formed by the enclosure of the shell 1 and the gas pipe 10, the heat exchange tubes 11 are uniformly distributed along the circumference and are staggered and arranged in a plurality of layers along the radial direction, the heat exchange tubes 11 are U-shaped, a plurality of connecting holes are uniformly formed in the shell 1, and the U-shaped open ends of the heat exchange tubes 11 are spliced and matched with the connecting holes one by one and are welded and fixed with the shell 1;

the utility model discloses a heat exchanger, including casing 1, cover 4, heat exchange tube 11, nitrogen gas pipeline 12, upper cover 2, lower cover 3, steam inlet 40 intercommunication steam source, steam circulate between cover 4 and heat exchange tube 11 through the connecting hole in the cover that presss from both sides, 1 bottom of casing is equipped with a plurality of nitrogen gas pipeline 12, nitrogen gas pipeline 12 stretches into 1 inner chamber of casing and communicates gas-supply pipe 10 in order to carry nitrogen gas to gas-supply pipe 10, 2 tops of upper cover are equipped with feed inlet 20, and the 3 bottoms of lower.

Specifically, the casing 1 is further surrounded with a circular pipe 5, the circular pipe 5 is fixedly connected with the inner wall of the jacket 4 through a connecting plate 50, the pipe wall of the circular pipe 5 is uniformly provided with a plurality of through holes, a plurality of steam inlets 40 are uniformly distributed along the circumference, the plurality of steam inlets 40 are respectively communicated with the circular pipe 5 through steam pipelines 41, and the steam pipelines 41 are fixedly connected with the jacket 4.

The connecting plate 50 comprises a longitudinal plate 51 and a transverse plate 52 perpendicular to the longitudinal plate 51, an arc part 53 attached to the outer wall of the ring pipe 5 is arranged at the intersection of the longitudinal plate 51 and the transverse plate 52, and one end of the transverse plate 52 far away from the arc part 53 is fixedly connected to the inner wall of the jacket 4.

In the scheme, the gas pipe 10 is vertically arranged in the middle of the shell 1, the gas pipe 10 and the inner cavity of the shell 1 form an annular cavity, the heat exchange pipes 11 are uniformly distributed along the circumference and are arranged in a staggered manner along the radial direction to fill the annular cavity, the heat exchange pipes 11 are U-shaped, the U-shaped open ends are conveniently connected with the shell 1, the shell 1 is provided with connecting holes, the U-shaped open ends are respectively inserted into the connecting holes and are welded and fixed with the shell 1 at the connecting parts, a circle of jacket 4 is arranged outside the shell 1, the inner wall of the jacket 4 and the outer wall of the shell 1 form a cavity with closed periphery, the shell 1 is also provided with a circular pipe 5 in a surrounding manner, the circular pipe 5 is fixed with the jacket 4 through a connecting plate 50, the connecting plate 50 is simple in structure and reliably supports the circular pipe 5, the circular pipe 5 is provided with a plurality of, steam inlet 40 is not connected to ring canal 5 through steam conduit 41 with the one end that the steam source links to each other, steam enters into ring canal 5 and enters into through the through-hole and presss from both sides in the cover 4, make steam flow out simultaneously from a plurality of directions through seting up the through-hole on ring canal 5, and enter into heat exchange tube 11 through the connecting hole, thereby give off heat and carry out the drying to the catalyst, it is more even to be heated, drying effect is good, through setting up gas-supply pipe 10 and nitrogen gas pipeline 12, nitrogen gas pipeline 12 is not connected the nitrogen gas jar with the one end that gas-supply pipe 10 links to each other, realize the continuous supply of nitrogen gas, adopt the nitrogen gas of low moisture content rate (containing wet 0.01%) as drying medium, have great wet ability of carrying, further improve the drying effect of catalyst, improve the activity of catalyst, and then effectively prolong the life of catalyst, improve the conversion efficiency.

In the above scheme, as shown in fig. 1, a plurality of draft tubes 13 are circumferentially distributed outside the shell 1 in an array manner, the draft tubes 13 extend along the axial direction of the shell 1, two ends of the draft tube 13 are respectively installed on the shell 1 through rib plates 14, and the lower end of the jacket 4 is further provided with a condensate outlet 42. Steam condenses after heat exchange, and immerses to press from both sides the cover 4 bottom along honeycomb duct 13 landing, discharges through condensate outlet 42, and meanwhile, steam continuously gets into the constancy of temperature that makes the cover 4 inner chamber, and then guarantees drying effect.

In the above scheme, the shell 1 is further provided with two groups of horizontal plates 15, the horizontal plates 15 are respectively distributed at the upper end and the lower end of the heat exchange tube 11, each horizontal plate 15 is composed of a plurality of flat steels 16 positioned on the same horizontal plane, and two ends of each flat steel 16 are fixedly connected with two adjacent heat exchange tubes 11 respectively. Through setting up band steel 16, fix heat exchange tube 11, improve heat exchange tube 11's wholeness, make it more firm.

In the above scheme, the upper end of the shell 1 is horizontally provided with the gas recovery pipe 17, and one end of the gas recovery pipe 17 extends into the inner cavity of the shell 1 and the gas recovery pipe 17 at the extending end is provided with a plurality of recovery holes. The gas recovery pipe 17 is used for recovering nitrogen after moisture absorption and fine powder raised in the drying process, so that the drying effect is further ensured.

In the above scheme, the upper end of the gas pipe 10 is provided with an upper cover 18 for sealing the top of the gas pipe 10, and the upper cover 18 is in a cone shape. Can effectively prevent the catalyst from gathering at the top and causing the jam to the gas-supply pipe 10, make the catalyst dispersion in the space between heat exchange tube 11 and gas-supply pipe 10 to the thermally equivalent, drying effect is good.

In the above scheme, 3 inner chamber bottoms of low head are equipped with the distribution of frustum structure and bore 31, the distribution is bored 31 inner chambers and is hollow, and evenly sets up the mesh on the wallboard of distribution awl 31, distributes and bores 31 bottom intercommunication row acid mouth 32, row acid mouth 32 one side is located in the slope of discharge gate 30. The outer wall of the lower end enclosure 3 is sleeved with a steam coil 33 which is spirally arranged, the steam coil 33 is provided with an air inlet end and an air outlet end, and the air inlet end and the air outlet end are communicated with an external steam system. Through setting up distribution awl 31 and row sour mouth 32 for discharge catalyst is because of the sour of moist production, and the catalyst that the drying was accomplished is unloaded from discharge gate 30 and is collected, and the awl 31 that distributes simultaneously prevents the catalyst separation outside that there is the blind spot when the catalyst is discharged, adopts steam coil 33 heating, realizes secondary drying, further the moisture in the desorption catalyst, improves the activity of catalyst.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A catalyst high-efficiency drying activation reactor for vinyl chloride synthesis conversion is characterized in that: the gas pipe is vertically arranged in the middle of an inner cavity of the shell, the bottom and the top of the gas pipe are both closed, and a plurality of gas holes are formed in the pipe wall of the gas pipe;

2. The catalyst drying and activating reactor as claimed in claim 1, wherein: the steam pipe is fixedly connected with the inner wall of the jacket through a connecting plate, a plurality of through holes are uniformly formed in the pipe wall of the ring pipe, a plurality of steam inlets are uniformly distributed along the circumference and are respectively communicated with the ring pipe through steam pipes, and the steam pipes are fixedly connected with the jacket.

3. The catalyst drying and activating reactor as claimed in claim 2, wherein: the connecting plate comprises a longitudinal plate and a transverse plate perpendicular to the longitudinal plate, an arc part attached to the outer wall of the ring pipe is arranged at the intersection of the longitudinal plate and the transverse plate, and one end, far away from the arc part, of the transverse plate is fixedly connected with the inner wall of the jacket.

4. The catalyst drying and activating reactor as claimed in claim 1, wherein: the shell is externally provided with a plurality of guide pipes in an array mode along the circumference, the guide pipes extend along the axis direction of the shell, two ends of each guide pipe are installed on the shell through rib plates, and the lower end of the jacket is further provided with a condensate outlet.

5. The catalyst drying and activating reactor as claimed in claim 1, wherein: the heat exchanger is characterized in that two groups of horizontal plates are further arranged in the shell, the horizontal plates are respectively distributed at the upper end and the lower end of the heat exchange tube and consist of a plurality of flat steels positioned on the same horizontal plane, and two ends of each flat steel are fixedly connected with two adjacent heat exchange tubes respectively.

6. The catalyst drying and activating reactor as claimed in claim 1, wherein: the upper end of the shell is horizontally provided with a gas recovery pipe, and one end of the gas recovery pipe extends into the inner cavity of the shell and a plurality of recovery holes are formed in the gas recovery pipe at the extending end.

7. The catalyst drying and activating reactor as claimed in claim 1, wherein: the upper end of the gas pipe is provided with an upper cover used for sealing the top of the gas pipe, and the upper cover is in a cone shape.

8. The catalyst drying and activating reactor as claimed in claim 1, wherein: the bottom of the inner cavity of the lower end socket is provided with a distribution cone of a frustum structure, the inner cavity of the distribution cone is hollow, meshes are uniformly formed in a wallboard of the distribution cone, the bottom of the distribution cone is communicated with an acid discharge port, and the discharge port is obliquely arranged on one side of the acid discharge port.

9. The catalyst drying and activating reactor as claimed in claim 1, wherein: the outer wall of the lower end socket is sleeved with a steam coil which is spirally arranged, the steam coil is provided with an air inlet end and an air outlet end, and the air inlet end and the air outlet end are communicated with an external steam system.