CN220861036U - Equipment for removing acidic impurities in hexafluorobutadiene - Google Patents

Abstract

The utility model discloses equipment for removing acidic impurities in hexafluorobutadiene, which belongs to the technical field of electronic special gas purification and comprises a deacidification device for removing impurities, wherein a raw material component for providing raw materials is arranged on the deacidification device; the deacidification device is provided with a condensing device for cooling gas; the condensing device is provided with a dehydration device for raw material dehydration; the raw material component is provided with a nitrogen component for nitrogen replacement; the deacidification device comprises a first absorption column, a second absorption column, a water inlet main pipe, a liquid outlet main pipe, a valve six and a valve seven, wherein the air inlet end of the first absorption column and the air inlet end of the second absorption column are connected with a raw material assembly, the water inlet main pipe and the liquid outlet main pipe are connected between the first absorption column and the second absorption column, the valve six is fixedly arranged on the water inlet main pipe, and acid impurities in hexafluorobutadiene are absorbed by using water which is low in cost and easy to obtain, so that the use cost is greatly reduced.

Description

Equipment for removing acidic impurities in hexafluorobutadiene

Technical Field

The utility model relates to the technical field of electronic special gas purification, in particular to equipment for removing acidic impurities in hexafluorobutadiene.

Background

In recent years, since hexafluorobutadiene has excellent properties such as good etching selectivity, high precision, and easy decomposition in the atmosphere, it can be used as an etching gas, and when hexafluorobutadiene is used as an etching gas, it has a high requirement for the impurity content, and thus purification of hexafluorobutadiene is critical.

The prior art, such as CN109180424B, is a purifying method and purifying device of hexafluorobutadiene, comprising a first rectifying tower, a second rectifying tower, an adsorption tower, a third rectifying tower and a filter.

However, the purification method and the purification device of hexafluorobutadiene have the problems that in order to remove impurities in hexafluorobutadiene, a plurality of groups of rectifying tower equipment are used, and the minimum acid impurities can be reduced to 2PPM under the action of the rectifying tower, so that the acid impurities can corrode the rectifying tower, and the use cost is greatly increased.

Based on this, the present utility model has devised an apparatus for removing acidic impurities in hexafluorobutadiene to solve the above-mentioned problems.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model provides an apparatus for removing acidic impurities from hexafluorobutadiene.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

An acidic impurity removing device in hexafluorobutadiene, which comprises a deacidification device for removing impurities,

The deacidification device is provided with a raw material component for providing raw materials;

the deacidification device is provided with a condensing device for cooling gas;

the condensing device is provided with a dehydration device for raw material dehydration;

the raw material component is provided with a nitrogen component for nitrogen replacement;

The deacidification device comprises a first absorption column, a second absorption column, a water inlet main pipe, a liquid outlet main pipe, a valve six and a valve seven, wherein the air inlet end of the first absorption column and the air inlet end of the second absorption column are connected with a raw material assembly, the water inlet main pipe and the liquid outlet main pipe are connected between the first absorption column and the second absorption column, the valve six is fixedly arranged on the water inlet main pipe, the valve seven is fixedly arranged on the liquid outlet main pipe, and the second absorption column is connected with a condensing device.

Furthermore, the first absorption column and the second absorption column are identical in inner parts and are made of acid-resistant polypropylene, polyethylene and polytetrafluoroethylene materials.

Still further, the feed inlet and the raw materials subassembly of first inlet pipe are connected, the first inlet pipe end is close to first absorption column bottom, and the end of first inlet pipe is sealed, a plurality of groups ventholes have been seted up near terminal department on the first inlet pipe, first absorption column inner wall fixed mounting has a plurality of groups felting needles, the pointed end and the venthole of felting needle are corresponding, first inlet pipe is connected with rotating assembly, the inlet end and the gas outlet fixed connection of first absorption column of first blast pipe, the delivery port and the water inlet fixed connection of first absorption column of first inlet pipe, rotating assembly corresponds with the delivery port of first inlet pipe, first blast pipe is located the top of first inlet pipe, fixed mounting has valve eight on the first inlet pipe, fixed mounting has valve nine on the first inlet pipe, first blast pipe and raw materials subassembly are connected, the inner bottom fixed mounting of first absorption column has first heater, the inlet and the liquid outlet of first drain pipe are fixed connection, valve ten fixed mounting is on first drain pipe, the liquid outlet and seven last fixed mounting valves.

Further, the second absorption column is consistent with the interior of the first absorption column, the feed inlet of the second feed pipe is connected with the raw material component, the air inlet of the second exhaust pipe is fixedly connected with the air outlet of the second absorption column, the air outlet of the second exhaust pipe is connected with the condensing device, the valve twelve is fixedly installed at one end of the second exhaust pipe, which is close to the condensing device, of the second exhaust pipe, the valve fourteen is fixedly installed at one end of the second exhaust pipe, the water inlet of the second water inlet pipe is fixedly connected with the water inlet main pipe, the valve eleven is fixedly installed on the second water inlet pipe, the water outlet of the second water inlet pipe is fixedly connected with the water inlet of the second absorption column, the liquid inlet of the second liquid outlet pipe is fixedly connected with the liquid outlet of the second absorption column, and the liquid outlet of the second liquid outlet pipe is fixedly connected with the liquid outlet main pipe, and the valve thirteenth is fixedly installed on the second liquid outlet pipe.

Still further, the rotation subassembly includes conical plate, round hole and arc baffle, the conical plate rotates to be connected on the outer wall of first inlet pipe, and the conical plate outer end is close to the inner wall of first absorption post, evenly offered a plurality of groups round hole on the conical plate, the even fixed mounting in top outer end of conical plate has a plurality of groups arc baffle, arc baffle corresponds with the delivery port of first inlet tube.

Still further, the raw materials subassembly includes valve two, first check valve, first raw material pipe, second raw material pipe, valve three, valve four and valve five, the feed inlet of first raw material pipe is connected with raw materials device, the discharge gate of first raw material pipe and the feed inlet fixed connection of first inlet pipe, from left to right fixed mounting respectively has valve two, first check valve and valve three on the first raw material pipe in proper order, be connected with nitrogen gas subassembly between valve two and the first check valve, with the feed inlet fixed connection of second raw material pipe between first check valve and the valve three, be connected with condensing equipment in first raw material pipe between valve three and the first inlet pipe, fixed mounting has valve four and valve five on the second raw material pipe respectively, the discharge gate of second raw material pipe and the feed inlet fixed connection of first blast pipe between valve four and the valve five, the discharge gate of second raw material pipe and the feed inlet fixed connection of second inlet pipe.

Still further, condensing equipment includes condensation post, condenser, blow-down pipe, valve fifteen, drain pipe, valve sixteen, the gas outlet fixed connection of blow-down pipe and condensation post, valve fifteen fixed mounting is on the blow-down pipe, condenser fixed mounting is inside the condensation post, the gas outlet of second blast pipe passes condensation post and condenser air inlet fixed connection, the inlet of drain pipe and the liquid outlet fixed connection of condensation post, the liquid outlet and the first raw materials pipe fixed connection of drain pipe, and junction is located the right-hand member of valve three, sixteen fixed mounting of valve is on the drain pipe, the drain pipe is connected with dewatering device.

Still further, dewatering device includes third raw material pipe, valve seventeen, second heater, relief pressure valve, valve eighteen, adsorption column, second nitrogen pipe, valve nineteen, first tail gas pipe, valve twenty, second check valve, second tail gas pipe, gas pipeline, valve twenty-one, the inlet and the drain pipe connection of third raw material pipe, and junction are located between valve sixteen and the condensation column, the gas outlet of third raw material pipe and the lower extreme air inlet fixed connection of adsorption column, from left to right fixed mounting has valve seventeen, second heater, relief pressure valve and valve eighteen on the third raw material pipe in proper order, the gas outlet of second nitrogen pipe and the upper end air inlet fixed connection of adsorption column, the air inlet and the desorption nitrogen device fixed connection of second nitrogen pipe, fixed mounting has the valve nineteen on the second nitrogen pipe, the air inlet and the upper portion of adsorption column gas outlet fixed connection, the gas outlet and the product collection device of gas pipeline are connected, fixed mounting has valve twenty-one on the gas pipeline, gas pipeline gas outlet and the lower extreme air inlet and the second tail gas pipe fixed connection, the second tail gas inlet and the second tail gas device are located from left and right fixed connection.

Further, a molecular sieve A water absorbent is arranged in the adsorption column.

Still further, the nitrogen component includes first nitrogen pipe and valve one, the air inlet and the nitrogen gas device of first nitrogen pipe are connected, the gas outlet and the first raw materials pipe fixed connection of first nitrogen pipe and junction are located between valve two and the first check valve, valve two fixed mounting is on first nitrogen pipe.

Advantageous effects

According to the utility model, raw materials of hexafluorobutadiene are firstly sent into a first absorption column of a de-acidification device for removing impurities to be contacted with water, acidic impurities in hexafluorobutadiene melted in water are absorbed by the water, and then most of hexafluorobutadiene with acidic impurities removed enters a second absorption column to be de-acidified again, so that the problem that the acid impurities are removed from the raw materials in the last step, namely, the raw materials are not thoroughly de-acidified, the repeated de-acidification operation is obviously improved, and compared with the common de-acidification method, the acidic impurities in hexafluorobutadiene are absorbed by using cheap and easily available water, so that the use cost is greatly reduced; the water adding pipes of the two groups of absorption columns are connected in parallel and are provided with a common water adding port, so that when water is conveniently added, only one water adding port is needed to be switched through a valve, and the two groups of absorption columns are not needed to be respectively connected with the water pipes or respectively provided with funnels; in addition, the air pressure of the two absorption columns can be balanced through the switching of the valves.

When water flows into the first absorption column through the first water inlet pipe of the first absorption column, the water firstly collides with the arc-shaped baffle of the rotating assembly, the arc-shaped baffle drives the conical plate to rotate continuously under the impact of the water flow, and meanwhile, the water flows onto the inner wall of the first absorption column, so that the water flows to the bottom along the inner wall of the first absorption column, raw materials for removing acidic impurities enter the first exhaust pipe through the round holes, the impact of the water flow on the bottom of the absorption column is reduced directly through the conical plate, the round holes and the arc-shaped baffle, the water flow flows along the inner wall of the absorption column, the raw materials adhered onto the inner wall of the absorption column are enabled to be in contact reaction with the water flow again, and the impurity removal efficiency of the raw materials is improved.

According to the utility model, after the raw material is contacted with water, a part of acidic impurities in the raw material are absorbed by the water, and the other part of acidic impurities can escape from the water-insoluble gas to form bubbles, and at the moment, the bubbles formed by needling of the first absorption column corresponding to the air outlet hole are destroyed, so that the escaped impurities are absorbed by the water again, and the impurity removal efficiency of the raw material is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a plan view showing the main structure of a device for removing acidic impurities from hexafluorobutadiene according to the present utility model;

FIG. 2 is a perspective view showing the structure of an apparatus for removing acidic impurities from hexafluorobutadiene according to the present utility model;

FIG. 3 is a front view showing the structure of an apparatus for removing acidic impurities from hexafluorobutadiene according to the present utility model;

Fig. 4 is a cross-sectional view taken along the A-A direction of fig. 3.

Reference numerals in the drawings represent respectively:

1. A nitrogen component; 11. a first nitrogen pipe; 12. a valve I; 2. a raw material component; 21. a second valve; 22. a first check valve; 23. a first raw material pipe; 24. a second raw material pipe; 25. a third valve; 26. a valve IV; 27. a fifth valve; 3. a deacidification device; 31. a first absorption column; 311. a first feed tube; 312. a first exhaust pipe; 313. a first water inlet pipe; 314. a valve eight; 315. a valve nine; 316. a needle; 317. a rotating assembly; 3171. a conical plate; 3172. a round hole; 3173. an arc baffle; 318. a first heater; 319. a first liquid discharge pipe; 320. a valve ten; 32. a second absorption column; 321. a second feed tube; 322. a second exhaust pipe; 323. a second water inlet pipe; 324. a valve eleven; 325. a valve twelve; 326. a second liquid discharge pipe; 327. thirteen valves; 328. a valve fourteen; 33. a water inlet main pipe; 34. a liquid outlet main pipe; 35. a valve six; 36. a valve seven; 4. a condensing device; 41. a condensing column; 42. a condenser; 43. blow-down pipe; 44. fifteen valves; 45. a liquid outlet pipe; 46. a valve sixteen; 5. a dehydration device; 51. a third raw material pipe; 52. seventeen valves; 53. a second heater; 54. a pressure reducing valve; 55. eighteen valves; 56. an adsorption column; 57. a second nitrogen pipe; 58. nineteenth valve; 59. a first tail gas pipe; 510. a valve twenty; 511. a second check valve; 512. a second tail gas pipe; 513. a gas conduit; 514. and twenty-one valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model is further described below with reference to examples.

In some embodiments and referring to fig. 1-4 of the specification, an apparatus for removing acidic impurities from hexafluorobutadiene comprises a deacidification device 3 for removing impurities,

The deacidification device 3 comprises a first absorption column 31, a second absorption column 32, a water inlet main pipe 33, a liquid outlet main pipe 34, a valve six 35 and a valve seven 36, wherein the air inlet end of the first absorption column 31 and the air inlet end of the second absorption column 32 are connected with the raw material assembly 2, the water inlet main pipe 33 and the liquid outlet main pipe 34 are connected between the first absorption column 31 and the second absorption column 32, the valve six 35 is fixedly arranged on the water inlet main pipe 33, the valve seven 36 is fixedly arranged on the liquid outlet main pipe 34, and the second absorption column 32 is connected with the condensing device 4;

Preferably, the first absorption column 31 and the second absorption column 32 are identical in interior and made of acid-resistant polypropylene, polyethylene, polytetrafluoroethylene and other materials;

Opening a valve six 35 of the deacidification device 3, enabling water to enter the first absorption column 31 and the second absorption column 32 respectively through the water inlet header pipe 33, enabling raw materials to enter the first absorption column 31 through the raw material assembly 2, enabling some acidic impurities in the raw materials to be adsorbed by the water after the raw materials are contacted with the water, enabling the adsorbed raw materials to enter the second absorption column 32 through the raw material assembly 2 to be contacted with the water again, further removing the acidic impurities in the raw materials, and enabling the raw materials after the acidic impurities are removed to enter the condensing device 4 for cooling.

The feed inlet of the first feed pipe 311 is connected with the raw material component 2, the tail end of the first feed pipe 311 is close to the bottom of the first absorption column 31 by about 5 cm, the tail end of the first feed pipe 311 is sealed, a plurality of groups of air outlet holes are formed in the position, close to the tail end, of the first feed pipe 311, of the first absorption column 31, a plurality of groups of needles 316 are fixedly arranged on the inner wall of the first absorption column 31, the tips of the needles 316 correspond to the air outlet holes, the first feed pipe 311 is connected with a rotating component 317, the air inlet end of a first exhaust pipe 312 is fixedly connected with the air outlet of the first absorption column 31, the water outlet of the first feed pipe 313 is fixedly connected with the water inlet of the first absorption column 31, the rotating component 317 corresponds to the water outlet of the first inlet pipe 313, the first exhaust pipe 312 is positioned above the first feed pipe 313, a valve eight 314 is fixedly arranged on the first exhaust pipe 312, a valve nine 315 is fixedly arranged on the first feed pipe 313, the first exhaust pipe 313 is fixedly connected with the water inlet main 33, the first exhaust pipe 312 is connected with the raw material component 2, the inner bottom of the first absorption column 31 is fixedly provided with a first heater 318, the liquid inlet of the first exhaust pipe 319 is fixedly connected with the liquid outlet 319 of the first absorption column 31, the valve 319 is fixedly connected with the water outlet 319 of the first intake pipe 31, the water outlet is fixedly connected with the valve nine liquid outlet pipe 34, the first exhaust pipe is fixedly connected with the first exhaust pipe 34, and the valve outlet pipe outlet valve is fixedly connected with the main 34;

The second absorption column 32 is consistent with the interior of the first absorption column 31, a feed inlet of the second feed pipe 321 is connected with the raw material assembly 2, an air inlet of the second exhaust pipe 322 is fixedly connected with an air outlet of the second absorption column 32, an air outlet of the second exhaust pipe 322 is connected with the condensing device 4, a valve twelve 325 is fixedly arranged at one end of the second exhaust pipe 322 close to the second absorption column 32, a valve fourteen 328 is fixedly arranged at one end of the second exhaust pipe 322 close to the condensing device 4, a water inlet of the second feed pipe 323 is fixedly connected with the water inlet main pipe 33, a valve eleven 324 is fixedly arranged on the second feed pipe 323, a water outlet of the second feed pipe 323 is fixedly connected with a water inlet of the second absorption column 32, a liquid inlet of the second liquid discharge pipe 326 is fixedly connected with a liquid outlet of the second absorption column 32, a liquid outlet of the second liquid discharge pipe 326 is fixedly connected with the liquid outlet main pipe 34, and a valve thirteenth 327 is fixedly arranged on the second liquid discharge pipe 326;

The valve six 35, the valve nine 315 and the valve eleven 324 are respectively opened, water enters the first absorption column 31 and the second absorption column 32 through the water inlet header pipe 33 respectively from the first water inlet pipe 313 and the second water inlet pipe 323, the water contacts the rotating component 317 when passing through the water outlet of the first water inlet pipe 313, the rotating component 317 uniformly pushes the water to the inner wall of the first absorption column 31, the water flows to the bottom along the inner wall of the first absorption column 31, the second absorption column 32 is also internally provided, the impact of the water flow on the bottom of the absorption column is reduced directly by the rotating component 317, the water flow flows along the inner wall of the absorption column, the raw materials adhered to the inner wall of the absorption column are subjected to contact reaction again with the water flow, and the impurity removal efficiency of the raw materials is improved; when the water level is one third to two thirds of the height of the absorption columns, the water can be stopped, the raw materials enter the first feeding pipe 311 through the raw material component 2, then enter the water through the air outlet holes on the first feeding pipe 311, the first heaters 318 in the two groups of absorption columns are opened, the first heaters 318 are continuously used for heating the absorption columns, the situation that the temperature in the absorption columns is low to influence the liquefied and accumulated hexafluorobutadiene in the absorption columns to avoid air discharge is prevented, after the raw materials are contacted with the water, part of acidic impurities in the raw materials are absorbed by the water, and the other part of the acidic impurities can escape from the water-insoluble gas to form bubbles, at the moment, the bubbles formed by the needling 316 corresponding to the air outlet holes are destroyed, the escaped impurities are absorbed by the water again, the impurity removal efficiency of the raw materials is greatly improved, the raw materials after the impurity removal of the eight 314 are opened enter the second feeding pipe 321 through the raw material component 2 through the first air outlet pipe 312, and then the second feeding pipe 321 enters the second absorption column 32 to repeat the operation in the first absorption column 31, the valve twelve 325 and the valve fourteen 328 are opened, the deacidified raw material enters the condensing device 4 through the second exhaust pipe 322 to be cooled, when the acid impurity waste liquid dissolved in water is discharged from the first absorption column 31, the whole system is replaced by nitrogen, then the valve ten 320 and the valve seven 36 are opened, the pressure in the first absorption column 31 can be balanced by using the nitrogen for replacement in the liquid discharge process, the valve nine 315 and the valve eight 314 on the water inlet pipe can also be opened to use the air balance pressure, the waste liquid discharged from the second absorption column 32 is similar to the waste liquid discharged from the first absorption column 31, and the waste liquid in the two groups of absorption columns is uniformly discharged into the waste liquid collecting device through the liquid outlet header 34.

The deacidification device 3 is provided with a raw material component 2 for providing raw materials.

The deacidification device 3 is provided with a condensing device 4 for cooling gas.

The condensing device 4 is provided with a dehydration device 5 for raw material dehydration.

The raw material component 2 is provided with a nitrogen component 1 for nitrogen replacement.

In some embodiments, referring to fig. 1 to 4 of the disclosure, the rotating assembly 317 includes a tapered plate 3171, a circular hole 3172, and an arc baffle 3173, the tapered plate 3171 is rotatably connected to the outer wall of the first feeding pipe 311, the outer end of the tapered plate 3171 is close to the inner wall of the first absorption column 31, a plurality of groups of circular holes 3172 are uniformly formed in the tapered plate 3171, a plurality of groups of arc baffles 3173 are uniformly and fixedly installed at the outer end of the top of the tapered plate 3171, and the arc baffles 3173 correspond to the water outlet of the first feeding pipe 313;

When water flow enters the first absorption column 31 through the first water inlet pipe 313, the water firstly collides with the arc-shaped baffle 3173 of the rotating assembly 317, the arc-shaped baffle 3173 is impacted by the water flow to drive the conical plate 3171 to rotate continuously, meanwhile, the water flow is also sent to the inner wall of the first absorption column 31, so that the water flows to the bottom along the inner wall of the first absorption column 31, raw materials for removing acidic impurities enter the first exhaust pipe 312 through the round holes 3172, the impact of the water flow on the bottom of the absorption column is reduced directly through the conical plate 3171, the round holes 3172 and the arc-shaped baffle 3173, the water flow flows along the inner wall of the absorption column, raw materials adhered to the inner wall of the absorption column are enabled to react with the water flow in a contact mode again, and the impurity removal efficiency of the raw materials is improved.

The raw material assembly 2 comprises a valve II 21, a first check valve 22, a first raw material pipe 23, a second raw material pipe 24, a valve III 25, a valve IV 26 and a valve V27, wherein a raw material device is connected to a feed inlet of the first raw material pipe 23, a discharge outlet of the first raw material pipe 23 is fixedly connected with a feed inlet of a first feed pipe 311, the valve II 21, the first check valve 22 and the valve III 25 are respectively and sequentially and fixedly arranged on the first raw material pipe 23 from left to right, a nitrogen assembly 1 is connected between the valve II 21 and the first check valve 22, the first check valve 22 and the valve III 25 are fixedly connected with a feed inlet of a second raw material pipe 24, the first raw material pipe 23 positioned between the valve III 25 and the first feed pipe 311 is connected with a condensing device 4, the valve IV 26 and the valve V27 are respectively and fixedly arranged on the second raw material pipe 24, the second raw material pipe 24 positioned between the valve IV 26 and the valve V27 is fixedly connected with a gas inlet of a first gas outlet pipe 312, and the discharge outlet of the second raw material pipe 24 is fixedly connected with a feed inlet of a second gas pipe 321;

Opening a valve II 21, a first check valve 22 and a valve III 25 of the raw material assembly 2, enabling raw materials to enter the first absorption column 31 through a first raw material pipe 23 and a first feeding pipe 311, enabling water in the first absorption column 31 to be sucked back to a raw material end for preventing pressure change by the arrangement of the first check valve 22, opening a valve eight 314 and a valve five 27 after acidic impurities are removed from the raw materials in the first absorption column 31, enabling deacidified raw materials to enter a second raw material pipe 24 through a first exhaust pipe 312, enabling the deacidified raw materials to enter a second absorption column 32 through a second feeding pipe 321 through the second raw material pipe 24, and removing impurities again.

The condensing device 4 comprises a condensing column 41, a condenser 42, a blow-down pipe 43, a valve fifteen 44, a liquid outlet pipe 45 and a valve sixteen 46, wherein the blow-down pipe 43 is fixedly connected with an air outlet of the condensing column 41, the valve fifteen 44 is fixedly arranged on the blow-down pipe 43, the condenser 42 is fixedly arranged inside the condensing column 41, an air outlet of the second exhaust pipe 322 penetrates through the condensing column 41 and is fixedly connected with an air inlet of the condenser 42, a liquid inlet of the liquid outlet pipe 45 is fixedly connected with a liquid outlet of the condensing column 41, a liquid outlet of the liquid outlet pipe 45 is fixedly connected with the first raw material pipe 23, a connecting part is positioned at the right end of a valve III 25, the valve sixteen 46 is fixedly arranged on the liquid outlet pipe 45, and the liquid outlet pipe 45 is connected with the dehydrating device 5;

Opening a valve twelve 325 and a valve fourteen 328, enabling deacidified raw materials to enter a condenser 42 of a condensing device 4 from a second exhaust pipe 322, condensing raw materials containing water into a liquid state by the condenser 42, gathering at the lower part of a condensing column 41, enabling the raw materials to enter the condensing column 41 after passing through the second absorbing column 32, enabling the liquid state hexafluorobutadiene to be more than water density and insoluble in water, enabling the liquid state hexafluorobutadiene to be positioned at the lower end of the water, enabling the liquid state hexafluorobutadiene containing a small amount of water to flow into a dewatering device 5 through a liquid outlet pipe 45 for dewatering, closing the condenser 42 when more water gathers at the lower part of the condensing column 41, closing a pipeline towards the dewatering device 5, opening a valve sixteen 46, a valve IV 26, a valve V27 and a valve II 21, closing a valve III 25 and a valve V314, slightly improving the pressure of raw materials, enabling the raw materials to enter the condensing column 41 after passing through the second absorbing column 32, gathering more water into the first absorbing column 31, enabling the liquid state materials in the condensing column 41 to be fully pressed into the first absorbing column 31, enabling the liquid state materials to return to normal operation after the liquid state materials in the condensing column 41 are fully pressed into the first absorbing column 31, enabling the liquid state not to be separated from the hexafluorobutadiene to be separated from the water and to be recycled to be greatly reduced in cost by the first absorbing column.

In some embodiments, referring to fig. 1-4 of the specification, the dehydration device 5 includes a third raw material pipe 51, a valve seventeen 52, a second heater 53, a pressure reducing valve 54, a valve eighteen 55, an adsorption column 56, a second nitrogen gas pipe 57, a valve nineteen 58, a first tail gas pipe 59, a valve twenty 510, a second check valve 511, a second tail gas pipe 512, a gas pipeline 513, and a valve twenty-one 514, a liquid inlet of the third raw material pipe 51 is connected with a liquid outlet pipe 45 pipeline, and a connection position is located between the valve sixteen 46 and the condensation column 41, an air outlet of the third raw material pipe 51 is fixedly connected with an air inlet at the lower end of the adsorption column 56, the valve seventeen 52, the second heater 53, the pressure reducing valve 54, and the valve eighteen 55 are sequentially and fixedly installed on the third raw material pipe 51 from left to right, the gas outlet of the second nitrogen pipe 57 is fixedly connected with the gas inlet at the upper end of the adsorption column 56, the gas inlet of the second nitrogen pipe 57 is fixedly connected with a desorption nitrogen device, a valve nineteen 58 is fixedly arranged on the second nitrogen pipe 57, the gas inlet of the gas pipe 513 is fixedly connected with the gas outlet at the upper part of the adsorption column 56, the gas outlet of the gas pipe 513 is connected with a product collecting device, a valve twenty-one 514 is fixedly arranged on the gas pipe 513, the gas inlet of the first tail gas pipe 59 is fixedly connected with the gas pipe 513, the joint is positioned between the valve twenty-one 514 and the adsorption column 56, the gas outlet of the first tail gas pipe 59 is connected with a tail gas collecting device, the gas inlet of the second tail gas pipe 512 is fixedly connected with the gas outlet at the lower part of the adsorption column 56, the gas outlet of the second tail gas pipe 512 is connected with the tail gas collecting device, a valve twenty 510 and a second check valve 511 are fixedly arranged on the second tail gas pipe 512 from left to right in sequence;

preferably, a 3A molecular sieve water absorbing agent is disposed within the adsorption column 56;

The valve seventeen 52 and the valve eighteen 55 of the dehydration device 5 are opened, the liquid hexafluorobutadiene discharged from the condensation column 41 passes through the second heater 53 and the pressure reducing valve 54, the temperature and the pressure of the hexafluorobutadiene can be controlled, the hexafluorobutadiene enters the adsorption column 56 from bottom to top in a gas phase form, the hexafluorobutadiene is adsorbed by the water absorbent in the adsorption column 56, trace water in the hexafluorobutadiene is absorbed by the water absorbent, the valve twenty-one 514 is opened, the dehydrated and purified hexafluorobutadiene enters the product collecting device through the gas pipeline 513, and the generated waste gas is discharged into the tail gas collecting device through the first tail gas pipe 59; when the water absorbing agent is insufficient, the valve eighteen 55 and the valve twenty-one 514 are closed, the valve nineteen 58 and the valve twenty-one 510 are opened, desorbed nitrogen enters the adsorption column 56 through the second nitrogen pipe 57 to form a new water absorbing agent for dehydration of hexafluorobutadiene, and the generated waste gas is discharged into the tail gas collecting device through the second tail gas pipe 512.

The nitrogen component 1 comprises a first nitrogen pipe 11 and a valve I12, wherein an air inlet of the first nitrogen pipe 11 is connected with a nitrogen device, an air outlet of the first nitrogen pipe 11 is fixedly connected with a first raw material pipe 23, the joint is positioned between a valve II 21 and a first check valve 22, and the valve II 21 is fixedly arranged on the first nitrogen pipe 11;

Before raw material purification, the nitrogen gas is replaced by the system, firstly, valve one 12, a first check valve 22, valve four 26, valve five 27, valve twelve 325, valve fourteen 328, valve sixteen 46, valve nine 315 and valve six 35 of the nitrogen component 1 are opened, the second raw material pipe 24, the second absorption column 32, the second exhaust pipe 322, the condensation column 41, the liquid outlet pipe 45, the first raw material pipe 23 and the first absorption column 31 are replaced, and then, valve one 12, valve three 25, valve eight 314, valve five 27, valve twelve 325, valve fourteen 328, valve seventeen 52, pressure reducing valve 54, valve eighteen 55 and valve twenty-one 514 are opened to replace the rest of pipelines and equipment.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. Acid impurity removal equipment in hexafluorobutadiene, including being used for edulcoration deacidification device (3), its characterized in that:

the deacidification device (3) is provided with a raw material component (2) for providing raw materials;

A condensing device (4) for cooling the gas is arranged on the deacidification device (3);

the condensing device (4) is provided with a dehydration device (5) for raw material dehydration;

The raw material component (2) is provided with a nitrogen component (1) for nitrogen replacement;

The deacidification device (3) comprises a first absorption column (31), a second absorption column (32), a water inlet header pipe (33), a liquid outlet header pipe (34), a valve six (35) and a valve seven (36), wherein the air inlet end of the first absorption column (31) and the air inlet end of the second absorption column (32) are connected with a raw material assembly (2), the water inlet header pipe (33) and the liquid outlet header pipe (34) are connected between the first absorption column (31) and the second absorption column (32), the valve six (35) is fixedly arranged on the water inlet header pipe (33), the valve seven (36) is fixedly arranged on the liquid outlet header pipe (34), and the second absorption column (32) is connected with a condensing device (4).

2. The apparatus for removing acidic impurities from hexafluorobutadiene according to claim 1, wherein the first absorption column (31) and the second absorption column (32) are identical and are made of acid-resistant polypropylene, polyethylene and polytetrafluoroethylene.

3. The apparatus for removing acidic impurities from hexafluorobutadiene according to claim 2, wherein the inlet of the first feed pipe (311) is connected to the raw material component (2), the end of the first feed pipe (311) is close to the bottom of the first absorption column (31), the end of the first feed pipe (311) is sealed, a plurality of groups of air outlet holes are formed in the position close to the end of the first feed pipe (311), a plurality of groups of needles (316) are fixedly mounted on the inner wall of the first absorption column (31), the tips of the needles (316) correspond to the air outlet holes, the first feed pipe (311) is connected to the rotating component (317), the air inlet end of the first exhaust pipe (312) is fixedly connected to the air outlet of the first absorption column (31), the water outlet of the first feed pipe (313) is fixedly connected to the water inlet of the first absorption column (31), the rotating component (317) corresponds to the water outlet of the first feed pipe (313), the first exhaust pipe (312) is positioned above the first feed pipe (313), a valve eight (314) is fixedly mounted on the first exhaust pipe (312), a valve (318) is fixedly mounted on the first feed pipe (313), the inlet pipe (31) is fixedly connected to the first feed pipe (31), the first feed pipe (31) is fixedly connected to the first feed pipe (31), the inlet of first fluid-discharge tube (319) is fixedly connected with the liquid outlet of first absorption column (31), and valve ten (320) fixed mounting is on first fluid-discharge tube (319), and the liquid outlet of first fluid-discharge tube (319) is fixedly connected with play liquid house steward (34), is last to be fixedly mounted with valve seven (36) on play liquid house steward (34).

4. The apparatus according to claim 3, wherein the second absorption column (32) is consistent with the interior of the first absorption column (31), a feed inlet of the second feed pipe (321) is connected with the raw material assembly (2), an air inlet of the second exhaust pipe (322) is fixedly connected with an air outlet of the second absorption column (32), an air outlet of the second exhaust pipe (322) is connected with the condensing device (4), a valve twelve (325) is fixedly installed at one end of the second exhaust pipe (322) close to the second absorption column (32), a valve fourteen (328) is fixedly installed at one end of the second exhaust pipe (322) close to the condensing device (4), a water inlet of the second feed pipe (323) is fixedly connected with the water inlet main pipe (33), a valve eleven (324) is fixedly installed on the second feed pipe (323), a water outlet of the second feed pipe (323) is fixedly connected with a water inlet of the second absorption column (32), a liquid inlet of the second liquid discharge pipe (326) is fixedly connected with a liquid outlet of the second absorption column (32), a liquid outlet of the second liquid discharge pipe (326) is fixedly connected with the valve fourteen (327).

5. The apparatus for removing acidic impurities from hexafluorobutadiene as claimed in claim 4, wherein said rotating assembly (317) comprises a tapered plate (3171), a circular hole (3172) and an arc baffle (3173), said tapered plate (3171) is rotatably connected to the outer wall of the first feeding pipe (311), the outer end of said tapered plate (3171) is close to the inner wall of the first absorption column (31), a plurality of groups of circular holes (3172) are uniformly formed in said tapered plate (3171), a plurality of groups of arc baffles (3173) are uniformly and fixedly mounted at the outer end of the top of said tapered plate (3171), and said arc baffles (3173) correspond to the water outlet of the first water inlet pipe (313).

6. The apparatus for removing acidic impurities from hexafluorobutadiene according to claim 5, wherein the raw material component (2) comprises a valve two (21), a first check valve (22), a first raw material pipe (23), a second raw material pipe (24), a valve three (25), a valve four (26) and a valve five (27), wherein a raw material device is connected to a feed inlet of the first raw material pipe (23), a discharge outlet of the first raw material pipe (23) is fixedly connected to a feed inlet of a first feed pipe (311), a valve two (21), a first check valve (22) and a valve three (25) are fixedly installed on the first raw material pipe (23) from left to right in sequence, a nitrogen component (1) is connected between the valve two (21) and the first check valve (22), a feed inlet of the second raw material pipe (24) is fixedly connected between the first check valve two (22) and the valve three (25), a first raw material pipe (23) located between the valve three (25) and the first feed pipe (311) is fixedly connected to a condensing device (4), a valve two (21), a valve four (26) is fixedly connected to a feed inlet of the second raw material pipe (24) and a valve four (27) is fixedly installed between the valve four (27), the discharge port of the second raw material pipe (24) is fixedly connected with the feed port of the second feed pipe (321).

7. The apparatus according to claim 6, wherein the condensing unit (4) comprises a condensing column (41), a condenser (42), a blow-down pipe (43), a valve fifteen (44), a liquid outlet pipe (45) and a valve sixteen (46), the blow-down pipe (43) is fixedly connected with an air outlet of the condensing column (41), the valve fifteen (44) is fixedly mounted on the blow-down pipe (43), the condenser (42) is fixedly mounted inside the condensing column (41), an air outlet of the second exhaust pipe (322) passes through the condensing column (41) and is fixedly connected with an air inlet of the condenser (42), a liquid inlet of the liquid outlet pipe (45) is fixedly connected with a liquid outlet of the condensing column (41), a liquid outlet of the liquid outlet pipe (45) is fixedly connected with the first raw material pipe (23), the joint is positioned at a right end of the valve III (25), the valve sixteen (46) is fixedly mounted on the liquid outlet pipe (45), and the liquid outlet pipe (45) is connected with the dewatering unit (5).

8. The apparatus for removing acidic impurities from hexafluorobutadiene according to claim 7, wherein the dehydration device (5) comprises a third raw material pipe (51), a valve seventeen (52), a second heater (53), a pressure reducing valve (54), a valve eighteen (55), an adsorption column (56), a second nitrogen gas pipe (57), a valve nineteen (58), a first tail gas pipe (59), a valve twenty (510), a second check valve (511), a second tail gas pipe (512), a gas pipe (513) and a valve twenty-one (514), a liquid inlet of the third raw material pipe (51) is connected with a liquid outlet pipe (45) in a pipeline manner, a connection position is positioned between the valve sixteen (46) and a condensation column (41), a gas outlet of the third raw material pipe (51) is fixedly connected with a gas inlet at the lower end of the adsorption column (56), the valve seventeen (52), the second heater (53), the pressure reducing valve (54) and the valve eighteen (55) are sequentially and fixedly installed on the third raw material pipe (51), a gas outlet of the second nitrogen gas pipe (57) is fixedly connected with a gas inlet of the adsorption column (56), the second raw material pipe is fixedly connected with the second nitrogen gas inlet (57), the second raw material pipe is fixedly connected with the valve (57), the gas inlet of gas pipeline (513) is fixedly connected with the gas outlet on the upper portion of adsorption column (56), the gas outlet of gas pipeline (513) is connected with a product collecting device, fixedly mounted valve twenty-one (514) on gas pipeline (513), the gas inlet of first tail gas pipe (59) is fixedly connected with gas pipeline (513), and the junction is located between valve twenty-one (514) and adsorption column (56), the gas outlet of first tail gas pipe (59) is connected with a tail gas collecting device, the gas inlet of second tail gas pipe (512) is fixedly connected with the gas outlet on the lower portion of adsorption column (56), the gas outlet of second tail gas pipe (512) is connected with a tail gas collecting device, and valve twenty (510) and second check valve (511) are fixedly mounted on second tail gas pipe (512) from left to right in turn.

9. The apparatus for removing acidic impurities from hexafluorobutadiene as claimed in claim 8, wherein a 3A molecular sieve water absorbing agent is provided in the adsorption column (56).

10. The acidic impurity removal apparatus for hexafluorobutadiene as claimed in claim 9, wherein said nitrogen gas assembly (1) comprises a first nitrogen gas pipe (11) and a valve one (12), an air inlet of said first nitrogen gas pipe (11) is connected with a nitrogen gas device, an air outlet of said first nitrogen gas pipe (11) is fixedly connected with a first raw material pipe (23) and a connection point is located between a valve two (21) and a first check valve (22), said valve two (21) is fixedly installed on said first nitrogen gas pipe (11).