CN214598108U

CN214598108U - NMP waste liquid recovery device

Info

Publication number: CN214598108U
Application number: CN202022459394.0U
Authority: CN
Inventors: 方步思
Original assignee: Fujian Greenwell Material Technology Co ltd
Current assignee: Fujian Greenwell Material Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-11-05
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a NMP waste liquid recovery device, which belongs to the technical field of NMP recovery equipment and comprises a tower body, wherein a spray absorption device is arranged in the tower body, a coating machine and a cooling device are also included, a waste liquid circulating tank is arranged at the bottom of the tower body, a first absorption layer and a second absorption layer are sequentially arranged in the tower body from top to bottom, a second spray device is arranged between the second absorption layer and the first absorption layer, the second spray device is sequentially connected with the cooling device and a first circulating pump, the first spray device is arranged above the first absorption layer, a cooling channel is arranged at the bottom of the tower body, both sides of the cooling channel are respectively connected with a water inlet pipe and a water outlet pipe, the water outlet pipe is sequentially connected with a cooling box, the second circulating pump and the first spray device, the water inlet pipe is communicated with an external clean water source, a plurality of cooling pipes are arranged in the cooling channel, and the plurality of cooling pipes are sequentially arranged to form a one-way cooling channel, the utility model has the advantages of fully improving the absorption effect of NMP gas, the NMP waste liquid is effectively recycled.

Description

NMP waste liquid recovery device

Technical Field

The utility model relates to a NMP recovery plant technical field specifically is a NMP waste liquid recovery unit.

Background

N-methylpyrrolidone (NMP) is an aprotic solvent with extremely strong solubility and is widely applied to industries such as lithium batteries, medicines, pesticides, electronics, petrochemical industry and the like, NMP does not enter a final lithium battery product in the production and manufacturing process of lithium batteries, NMP is used as a solvent for dispersing a binder, the NMP is volatilized through a drying procedure at a certain temperature, and NMP-containing waste gas is generated into NMP waste liquid through a recovery device.

In the prior art, technical personnel in the related technical field provide a "NMP waste liquid recovery device" as proposed in chinese patent publication No. CN111545017A, which comprises a frame body, a tower body disposed on the frame body, the tower body sequentially comprising a liquid storage chamber, an adsorption chamber and a spray chamber from bottom to top, the adsorption chamber disposed in the tower body, the spray chamber disposed in the tower body, an air inlet pipe and a liquid outlet pipe disposed on the outer wall of the tower body and in communication with the tower body, a water replenishing pipe disposed on the tower body and in communication with the tower body disposed in the spray chamber, an air supply pipe disposed in communication with the air inlet pipe at the end portion of the air inlet pipe in the tower body, an air supply pipe extending from the end portion of the air supply pipe away from the air inlet pipe toward the center of the bottom of the tower body, the air supply pipe comprising a first air supply pipe and a second air supply pipe disposed perpendicular to the first air supply pipe, first air supply pipe is mutual intercommunication setting with the intake pipe, the circumference position along the second air supply pipe evenly is provided with a plurality of blast pipes on the second air supply pipe, every blast pipe all is mutual intercommunication setting with the second air supply pipe, the blast pipe evenly is provided with a plurality of outlet ducts along the length direction of blast pipe on adsorption equipment's the face, all be provided with the check valve in every outlet duct, the position that just is located the tip place of second air supply pipe on the first air supply pipe is provided with the connecting pipe, the second air supply pipe rotates and connects on the connecting pipe, the bottom of tower body is provided with and is used for driving the second air supply pipe and drives a plurality of blast pipe pivoted driving piece, though the utility model discloses can satisfy the dissolution effect that improves gas dissolution in aquatic, make gas can be more even dissolve in aquatic, further reach the saturated condition.

However, the technical solution in this application document still has disadvantages, such as high-speed gas flowing in the corresponding pipeline and tower, short contact time with water, incomplete cooling of the refluxed liquid, and unfavorable improvement of the absorption effect of NMP.

Based on this, the utility model designs a NMP waste liquid recovery unit to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a NMP waste liquid recovery unit to solve above-mentioned technical problem.

In order to achieve the above object, the utility model provides a following technical scheme:

an NMP waste liquid recovery device comprises a tower body, wherein a spray absorption device is arranged in the tower body, a coating machine and a cooling device are further included, a waste liquid circulating pool is arranged at the bottom of the tower body, the bottom of the side wall of the tower body is connected with the coating machine through an air inlet pipe and an air inlet fan, a first absorption layer and a second absorption layer are sequentially arranged in the tower body from top to bottom, a second spray device is arranged between the second absorption layer and the first absorption layer, the second spray device is sequentially connected with the cooling device and a first circulating pump through a circulating pipeline, a first spray device is arranged above the first absorption layer, a cooling channel is arranged below the waste liquid circulating pool at the bottom of the tower body, a water inlet pipe and a water outlet pipe are respectively connected to two sides of the cooling channel, the water outlet pipe is sequentially connected with a cooling box, the second circulating pump and the first spray device, and the water inlet pipe is communicated with an external clean water source, a plurality of cooling pipes extending into the waste liquid circulating pool are arranged in the cooling channel, the cooling pipes are sequentially arranged to form a one-way cooling passage, and an inlet and an outlet of the one-way cooling passage are respectively connected with a water inlet pipe and a water outlet pipe.

Preferably, the cooling pipes are in an inverted U shape and are sequentially arranged above the cooling channel, and a plurality of partition plates for spacing the cooling pipes and forming a one-way cooling passage are sequentially arranged in the cooling channel.

Preferably, the cooling device comprises a heat exchange box and a heat exchange tube, the heat exchange tube is communicated with an external clean water source, and the circulating pipeline penetrates through the heat exchange box and exchanges heat with the heat exchange tube in the heat exchange box for cooling.

Preferably, the cooler bin is from top to bottom including air inlet chamber, cooling chamber and the room of giving vent to anger of mutual interval in proper order, air inlet chamber one side is equipped with air-supply line and air-supply line connection cooling blower, it is equipped with out the tuber pipe to go out room one side, the outlet pipe penetrates by the cooling chamber upper end, and forms a plurality of snakelike crooked cooling segments in the cooling chamber, the second circulating pump is worn out and is connected to the cooling segment end in cooling chamber lateral wall bottom, be equipped with a plurality of partitions that are used for separating adjacent cooling segment in the cooling chamber in proper order, enclose between the partition and between partition and the cooling chamber lateral wall and close and form a plurality of cooling unit chambeies, it is a plurality of the upper and lower both sides in cooling unit chamber communicate air inlet chamber in proper order and go out the room.

Preferably, the outer wall of the cooling section is provided with a plurality of radiating fins.

Preferably, the part of the air inlet pipe penetrating into the tower body forms a bending section, the bending section extends to a position below the liquid level of the waste liquid circulating pool, and a one-way air valve is arranged on the bending section.

Preferably, the first spraying device and the second spraying device both comprise a main spraying pipe and a plurality of spraying heads arranged at the lower end of the main spraying pipe.

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

the utility model discloses simple structure, convenient operation sprays through the bilayer and absorbs NMP gas, and the upper and lower two-layer liquid source that sprays is the circulating liquid of clean water source and tower body bottom respectively, carry out make full use of to clean water source and make it cool off behind the circulating liquid in the waste liquid circulating pond via the cooler bin recooling once more, get into the tower body top and spray the absorption to NMP gas, circulating liquid in the waste liquid circulating pond is after clean water source and cooling device's dual cooling, spray the absorption to NMP gas at the tower body middle part. From this, can fully promote the gaseous absorption effect to NMP, effectively recycle the NMP waste liquid.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present embodiment;

fig. 2 is a schematic sectional view of the tower body in the present embodiment;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is a schematic sectional view showing the structure of the cooling tank in the present embodiment;

fig. 5 is an enlarged schematic view of the region B in fig. 4.

In the drawings, the components represented by the respective reference numerals are listed below:

1. coating machine; 2. an air intake fan; 3. an air inlet pipe; 31. bending the section; 32. a one-way air valve; 4. a tower body; 41. a waste liquid circulating tank; 42. a first absorbent layer; 43. a second absorbent layer; 44. a second spraying device; 441. a circulation line; 442. a first circulation pump; 443. spraying a main pipe; 444. a shower head; 45. a first spraying device; 5. an air outlet pipe; 6. a cooling device; 61. a heat exchange box; 62. a heat exchange pipe; 7. a cooling channel; 71. a water inlet pipe; 72. a water outlet pipe; 721. a cooling section; 722. a heat dissipating fin; 73. a cooling tank; 731. an air intake chamber; 732. a cooling chamber; 733. an air outlet chamber; 734. an air inlet pipe; 735. an air outlet pipe; 736. a spacer section; 737. a cooling unit cavity; 74. a second circulation pump; 75. a cooling tube; 76. a unidirectional cooling passage; 761. a partition plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a NMP waste liquid recovery unit, includes coating machine 1, air inlet fan 2, intake pipe 3, tower body 4 and the outlet duct 5 that connects gradually, and 4 bottoms of tower body and top are located respectively to intake pipe 3 and outlet duct 5.

A spray absorption device is arranged in the tower body 4, a cooling device 6 is arranged at one side of the tower body 4, a waste liquid circulating pool 41 is arranged at the bottom of the tower body 4, an air inlet pipe 3 is connected with the bottom of the side wall of the tower body 4 and penetrates below the liquid level of the waste liquid circulating pool 41, a first absorption layer 42 and a second absorption layer 43 are sequentially arranged in the tower body 4 from top to bottom, a second spray device 44 is arranged between the second absorption layer 43 and the first absorption layer 42, the second spray device 44 is fixed on the inner wall of the tower body 4 and connected with a circulating pipeline 441, the circulating pipeline 441 is sequentially connected with the cooling device 6, a first circulating pump 442 and the waste liquid circulating pool 41 outside the tower body 4, a first spray device 45 is arranged above the first absorption layer 42, a cooling channel 7 is arranged below the waste liquid circulating pool 41 at the bottom of the tower body 4, two sides of the cooling channel 7 are respectively connected with an water inlet pipe 71 and a water outlet pipe 72, the water outlet pipe 72 is sequentially connected with a cooling box 73, a second circulating pump 74 and the first spray device 45, the water inlet pipe 71 is communicated with an external clean water source, a plurality of cooling pipes 75 extending into the waste liquid circulating pool 41 are arranged in the cooling channel 7, the plurality of cooling pipes 75 are sequentially arranged to form a one-way cooling passage 76, and the inlet and the outlet of the one-way cooling passage 76 are respectively connected with the water inlet pipe 71 and the water outlet pipe 72.

Preferably, each of the first spraying device 45 and the second spraying device 44 includes a main spraying pipe 443 and a plurality of spraying heads 444 disposed at a lower end of the main spraying pipe 443.

Preferably, the cooling pipes 75 are inverted U-shaped and are sequentially arranged above the cooling channel 7, and a plurality of partition plates 761 for partitioning the cooling pipes 75 and forming the unidirectional cooling passages 76 are sequentially provided in the cooling channel 7, so that the unidirectional cooling passages 76 can be formed, heat exchange is performed on the sequentially flowing cooling pipes 75, heat of liquid in the waste liquid circulation tank 41 contacting with the outer wall of the cooling pipes 75 is taken away, the temperature of the liquid in the waste liquid circulation tank 41 is reduced, and the effect of absorbing NMP gas during cyclic spraying is improved.

Preferably, the cooling device 6 comprises a heat exchange box 61 and a heat exchange pipe 62, the heat exchange pipe 62 is communicated with an external clean water source, and the circulation pipeline 441 penetrates through the heat exchange box 61 and exchanges heat with the heat exchange pipe 62 in the heat exchange box 61 for cooling, so that the circulation liquid in the circulation pipeline 441 can be cooled for the second time through the heat exchange pipe 62, the circulation liquid is fully cooled, and the absorption effect of the circulation liquid on the NMP gas is further improved.

Preferably, the cooling box 73 includes an air inlet chamber 731, a cooling chamber 732 and an air outlet chamber 733 which are spaced from each other in sequence from top to bottom, an air inlet pipe 734 is arranged at one side of the air inlet chamber 731 and the air inlet pipe 734 is connected to a cooling fan (not shown), an air outlet pipe 735 is arranged at one side of the air outlet chamber 733, the water outlet pipe 72 penetrates through the upper end of the cooling chamber 732, a plurality of serpentine cooling sections 721 are formed in the cooling chamber 732, the tail ends of the cooling sections 721 penetrate through the bottom of the side wall of the cooling chamber 732 and are connected to the second circulating pump 74, a plurality of partition parts 736 for partitioning the adjacent cooling sections 721 are sequentially arranged in the cooling chamber 732, a plurality of cooling unit cavities 737 are formed between the partition parts 736 and the side wall of the cooling chamber 732, the upper and lower sides of the plurality of cooling unit cavities 737 are sequentially communicated with the air inlet chamber 731 and the air outlet chamber 733, thereby, cold air is generated by the cooling fan and simultaneously passes through the plurality of cooling unit cavities 737, the temperature of the clean water source in the different cooling sections 721 in the cooling unit cavity 737 is reduced to improve the absorption effect of the clean water source on the NMP gas after being sprayed by the first spraying device 45.

Preferably, the outer wall of the cooling section 721 is provided with a plurality of heat dissipating fins 722, and in this embodiment, the heat dissipating fins 722 are uniformly distributed outside the tube wall of the cooling section 721, so that the heat dissipating effect of the cooling section 721 can be further improved, the cooling effect of the cleaning water source in the cooling unit cavity 737 can be further reduced, and the absorption effect of the cleaning water source on the NMP gas can be further improved.

Preferably, the part of the air inlet pipe 3 penetrating into the tower body 4 forms a bending section 31, the bending section 31 extends to a position below the liquid level of the waste liquid circulation tank 41, and the bending section 31 is provided with a one-way air valve 32, so that NMP gas entering the waste liquid circulation tank 41 can be primarily absorbed, the absorption rate of the NMP gas can be further enhanced, and the one-way air valve 32 can prevent the circulating liquid in the waste liquid circulation tank 41 from flowing back.

One specific application of this embodiment is:

firstly, mixed gas with NMP gas enters a coating machine 1, enters a waste liquid circulating pool 41 through an air inlet fan 2 and an air inlet pipe 3 for preliminary absorption, then rises, sequentially passes through a second absorption layer 43 and a first absorption layer 42, is subjected to secondary absorption under the spraying of a second spraying device 44 and a first spraying device 45, and finally, relatively clean gas is discharged through an air outlet pipe 5 at the top of a tower body 4; the liquid sources of the first spraying device 45 and the second spraying device 44 are respectively cleaning water sources and circulating liquid in the waste liquid circulating tank 41, the cleaning water sources firstly carry out primary cooling on the liquid in the waste liquid circulating tank 41, then the liquid is cooled by the cooling box 73 and then enters the first spraying device 45 to spray and absorb NMP gas, and the circulating liquid in the waste liquid circulating tank 41 is cooled for the second time by the cooling device 6 and enters the second spraying device 44 to spray and absorb.

In summary, NMP gas is absorbed by the double-layer spraying, the liquid sources of the upper and lower layers of spraying are clean water source and the circulating liquid at the bottom of the tower body 4 respectively, the clean water source is fully utilized to cool the circulating liquid in the waste liquid circulating tank 41, and then the circulating liquid is cooled again by the cooling box 73, enters the top of the tower body 4 to spray and absorb NMP gas, and the circulating liquid in the waste liquid circulating tank 41 is cooled by the cleaning water source and the cooling device 6, and then the NMP gas is sprayed and absorbed at the middle of the tower body 4.

From this, can fully promote the gaseous absorption effect to NMP, effectively recycle the NMP waste liquid.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a NMP waste liquid recovery unit, includes tower body (4), be equipped with in tower body (4) and spray absorbing device, its characterized in that: the coating machine is characterized by further comprising a coating machine (1) and a cooling device (6), a waste liquid circulating pool (41) is arranged at the bottom of the tower body (4), the bottom of the side wall of the tower body (4) is connected with the coating machine (1) through an air inlet pipe (3) and an air inlet fan (2), a first absorption layer (42) and a second absorption layer (43) are sequentially arranged in the tower body (4) from top to bottom, a second spraying device (44) is arranged between the second absorption layer (43) and the first absorption layer (42), the second spraying device (44) is sequentially connected with the cooling device (6) and a first circulating pump (442) through a circulating pipeline (441), a first spraying device (45) is arranged above the first absorption layer (42), a cooling channel (7) is arranged below the waste liquid circulating pool (41) at the bottom of the tower body (4), and two sides of the cooling channel (7) are respectively connected with a water inlet pipe (71) and a water outlet pipe (72), outlet pipe (72) connect gradually cooling tank (73), second circulating pump (74) and first spray set (45), and inlet tube (71) intercommunication outside clean water source, be equipped with a plurality of cooling tubes (75) that extend to in waste liquid circulating tank (41) in cooling channel (7), and a plurality of cooling tubes (75) arrange in proper order and form one-way cooling channel (76), inlet tube (71) and outlet pipe (72) are connected respectively to the entry and the export of one-way cooling channel (76).

2. The NMP waste liquid recovery device according to claim 1, characterized in that: the cooling pipes (75) are inverted U-shaped and are sequentially arranged above the cooling channel (7), and a plurality of partition plates (761) used for separating the cooling pipes (75) and forming the one-way cooling passage (76) are sequentially arranged in the cooling channel (7).

3. The NMP waste liquid recovery device according to claim 1, characterized in that: the cooling device (6) comprises a heat exchange box (61) and a heat exchange pipe (62), the heat exchange pipe (62) is communicated with an external clean water source, and the circulating pipeline (441) penetrates through the heat exchange box (61) and exchanges heat with the heat exchange pipe (62) in the heat exchange box (61) for cooling.

4. The NMP waste liquid recovery device according to claim 1, characterized in that: the cooling box (73) comprises an air inlet chamber (731), a cooling chamber (732) and an air outlet chamber (733) which are mutually separated from one another in sequence from top to bottom, an air inlet pipe (734) is arranged at one side of the air inlet chamber (731), the air inlet pipe (734) is connected with a cooling fan, an air outlet pipe (735) is arranged on one side of the air outlet chamber (733), the water outlet pipe (72) penetrates through the upper end of the cooling chamber (732), and a plurality of serpentine cooling sections (721) are formed in the cooling chamber (732), the tail end of the cooling section (721) penetrates out of the bottom of the side wall of the cooling chamber (732) and is connected with a second circulating pump (74), a plurality of spacing parts (736) for separating adjacent cooling sections (721) are sequentially arranged in the cooling chamber (732), enclose between spacing portion (736) and cooling chamber (732) lateral wall and close and form a plurality of cooling unit chamber (737), a plurality of the upper and lower both sides of cooling unit chamber (737) communicate inlet chamber (731) and play air chamber (733) in proper order.

5. The NMP waste liquid recovery device according to claim 4, wherein: the outer wall of the cooling section (721) is provided with a plurality of radiating fins (722).

6. The NMP waste liquid recovery device according to claim 1, characterized in that: the part that intake pipe (3) penetrated inside tower body (4) forms bending section (31), bending section (31) extend to waste liquid circulation pond (41) below the liquid level, and are equipped with one-way pneumatic valve (32) on bending section (31).

7. The NMP waste liquid recovery device according to claim 1, characterized in that: the first spraying device (45) and the second spraying device (44) both comprise a main spraying pipe (443) and a plurality of spraying heads (444) arranged at the lower end of the main spraying pipe (443).