CN218200151U

CN218200151U - NMP storage device

Info

Publication number: CN218200151U
Application number: CN202221747813.3U
Authority: CN
Inventors: 迟松涛; 陈红; 金宗刚
Original assignee: Puyang Guangming Chemicals Co ltd
Current assignee: Puyang Guangming Chemicals Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-01-03
Anticipated expiration: 2032-07-08

Abstract

The utility model discloses an NMP storage device, which comprises a storage tank; a top cover of the storage tank is provided with a feeding pipe, the inner wall of the upper part of the storage tank is provided with a material receiving groove, the end part of the feeding pipe extends into the material receiving groove, and a plurality of material leaking holes are formed in the joint of the bottom part of the material receiving groove and the inner wall of the storage tank; the inner wall of the storage tank is provided with a buffer plate which spirally extends downwards around a central shaft of the storage tank, and the lower end of the buffer plate extends to the bottom of the storage tank; the upper end part of the buffer plate is positioned below the material receiving groove and is used for receiving materials from the material leaking hole; a discharge pipe is arranged at the bottom of the storage tank; the outer wall of the storage tank is provided with a grounding wire; and a top cover of the storage tank is provided with an exhaust pipeline.

Description

NMP storage device

Technical Field

The utility model belongs to the technical field of NMP production facility, concretely relates to NMP storage device.

Background

NMP is N-methyl pyrrolidone, and is widely applied to the production field of lithium ion batteries. NMP is produced by using gamma-butyrolactone as a raw material, and products are conveyed into an NMP storage tank by a pipeline for storage after production is finished. NMP is combustible liquid, the storage of the combustible liquid needs to avoid the phenomenon of electrostatic accumulation inside the tank body so as to avoid accidents, and the conventional electrostatic elimination generally adopts two methods, one method is to arrange an electrostatic grounding wire on the outer wall of the tank body and transmit the static away by utilizing the wire, and the other method is to spray near a storage tank area so as to increase the humidity of air and avoid the generation of static as much as possible. But the effect of eliminating static electricity is poor by only arranging the electrostatic grounding wire. In addition, during the storage of NMP, a part of the product is entrained in non-condensable gas and discharged to the atmosphere along with the pressure relief, and in order to eliminate the harm, the gas flow is generally discharged into a flare system to be combusted so as to eliminate the NMP entrained in the gas flow, wherein the method comprises the steps of waste caused by combustion and pollution caused by combustion discharge. Therefore, there is a need to design an NMP storage device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a NMP storage device to solve the problem that exists among the above-mentioned background art.

The utility model discloses following technical scheme will be adopted:

an NMP storage apparatus comprising a storage tank; a top cover of the storage tank is provided with a feeding pipe, the inner wall of the upper part of the storage tank is provided with a material receiving groove, the end part of the feeding pipe extends into the material receiving groove, and a plurality of material leaking holes are formed in the connecting part of the bottom of the material receiving groove and the inner wall of the storage tank; the inner wall of the storage tank is provided with a buffer plate which spirally extends downwards around a central shaft of the storage tank, and the lower end of the buffer plate extends to the bottom of the storage tank; the upper end part of the buffer plate is positioned below the material receiving groove and is used for receiving materials from the material leaking hole; a discharge pipe is arranged at the bottom of the storage tank; the outer wall of the storage tank is provided with a grounding wire; and a top cover of the storage tank is provided with an exhaust pipeline.

Further, the included angle between the buffer plate and the inner wall of the storage tank above the buffer plate is smaller than 90 degrees.

Furthermore, a first baffle is arranged at the higher end of the buffer plate, and a second baffle is arranged on one side of the buffer plate, which is far away from the side wall of the storage tank; the first baffle, the second baffle and the buffer plate form a falling space of the material.

Further, the exhaust pipeline is connected with a gas processing device arranged outside the storage tank; the gas treatment device comprises an adsorption chamber, a cooling chamber and a cache chamber which are arranged in sequence from top to bottom; the cooling chamber is arranged above the storage tank, a cooling coil is arranged in the cooling chamber, and water inlets and water outlets of the cooling coil extend to the outside of the cooling chamber; the exhaust pipeline is communicated with the cooling chamber, an outlet in the top of the cooling chamber is communicated with the adsorption chamber, and a non-condensable gas discharge port is formed in the top of the adsorption chamber; a liquid drainage pipeline is arranged at the bottom of the cooling chamber and is communicated with the cache chamber; a return pipeline is arranged between the bottom of the buffer chamber and the upper part of the storage tank; and activated carbon is arranged in the adsorption chamber.

Furthermore, a first partition plate and a second partition plate are arranged in the cooling chamber, and the cooling coil sequentially penetrates through the first partition plate and the second partition plate; the first baffle plate and the second baffle plate divide the cooling chamber into three chambers; the first baffle plate and the second baffle plate are alternately arranged at the bottom and the top of the cooling chamber, and a gap is formed between the free ends of the first baffle plate and the second baffle plate and the inner wall of the cooling chamber; the exhaust pipeline penetrates through the bottom plate of the cooling chamber and extends into the chamber on one side of the first baffle plate far away from the second baffle plate, so that airflow is in an S-shaped cooling channel in the cooling chamber; the top of the chamber on one side of the second baffle far away from the first baffle is communicated with the adsorption chamber through a pipeline; and the two liquid discharge pipelines are respectively arranged on the bottom plates of the cooling chambers on two sides of the baffle plate.

Further, the end of the drain extends to the bottom of the buffer chamber.

Furthermore, an emergency pressure relief opening is formed in the top of the storage tank; the emergency pressure relief port and the non-condensable gas discharge port are connected with a torch system.

Further, the feeding pipe is a bent pipe; and one end of the material receiving groove extends to the inner wall of the material receiving groove.

The utility model has the advantages that: the utility model discloses an among the NMP storage device inlet pipe through conveyor with the bin outlet pipe of apparatus for producing communicate, carry the material in the storage jar via the inlet pipe, because the inlet pipe below is provided with and connects the silo, the material in the inlet pipe is carried at first to connect the silo in the silo along the inner wall unloading of connecing the silo then through the hole of leaking and flow downwards along the inner wall of storage jar, because the below is provided with the buffer board, so the material is in following the buffer board and meandering to carry in the storage jar downwards, so set up, avoided the material to directly impact the bottom of storage jar, excessive static is made to accumulate in it with the excessive friction between bottom plate and the inner wall, from the root, the production of static in the feeding process has been less; in addition, the utility model discloses be provided with gas processing apparatus, when the internal pressure of jar body rises when leading to the internal pressure of jar when rising because the product exerts the temperature to volatilize in the jar body, open the valve on the exhaust duct, make gas enter into the cooling chamber, owing to separate baffle one and separate baffle two's setting, gaseous stroke has been prolonged, make gas after abundant cooling, the product that smugglies in the noncondensable gas is cooled off, the noncondensable gas enters into the adsorption chamber, after adsorbing the harmful gas in it, then discharge to atmosphere or enter into the torch system, and the product after the condensation enters into the buffer chamber along the drain line, when the accumulation more liquid in it, when discharging to the storage jar via the return line; the utility model discloses can retrieve the product as far as, avoid direct emission to cause the waste.

Description of the drawings:

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

reference numerals:

1. storing the tank; 2. a feed pipe; 3. an emergency relief vent; 4. an exhaust duct; 5. a material receiving groove; 6. a material leaking hole; 7. a buffer plate; 8. a first baffle plate; 9. a second baffle plate; 10. a ground lead; 11. a discharge pipe; 12. a return line; 13. a cooling chamber; 14. a liquid discharge conduit; 15. a cooling coil; 16. a first baffle plate; 17. a second baffle plate; 18. an adsorption chamber; 19. a noncondensable gas discharge port; 20. activated carbon; 21. a buffer chamber.

Detailed Description

The technical solution of the present invention will be further described with reference to fig. 1 and examples, so that those skilled in the art can more clearly understand the content of the technical solution.

Example 1:

as shown in fig. 1, the NMP storage apparatus of the present invention includes a storage tank 1; a feeding pipe 2 is arranged on the top cover of the storage tank 1, a material receiving groove 5 is arranged on the inner wall of the upper part of the storage tank 1, the end part of the feeding pipe 2 extends into the material receiving groove 5, and a plurality of material leaking holes 6 are arranged at the joint of the bottom of the material receiving groove 5 and the inner wall of the storage tank 1; the feeding pipe 2 is a bent pipe; and one end positioned in the material receiving groove 5 extends to the inner wall of the material receiving groove 5. A buffer plate 7 which extends spirally downwards around the central shaft of the storage tank 1 is arranged on the inner wall of the storage tank 1, and the lower end of the buffer plate 7 extends to the bottom of the storage tank 1; the upper end part of the buffer plate 7 is positioned below the material receiving groove 5 and is used for receiving materials in the material leakage hole 6; a discharge pipe 11 is arranged at the bottom of the storage tank 1; the outer wall of the storage tank 1 is provided with a grounding wire 10; and a top cover of the storage tank 1 is provided with an exhaust pipeline 4. The contained angle between 7 buffer boards and the storage jar 1 inner wall of its top is lighter than 90, so set up and make the buffer board in this embodiment highly reduce gradually to the inner wall of storage jar from the centre, consequently the material from leaking the material hole after dropping to the buffer board, can not drop from buffer board one side.

A first baffle plate 8 is arranged at the higher end of the buffer plate 7, and a second baffle plate 9 is arranged on one side of the buffer plate 7, which is far away from the side wall of the storage tank 1; the first baffle 8, the second baffle 9 and the buffer plate 7 form a falling space of the material. Add baffle one in this embodiment, baffle two, the same back of dropping from the hole that leaks is in order to prevent when the material, can directly drop the tank bottoms from one side of buffer plate, consequently the material enters into the storage jar back from the inlet pipe, at first along the inner wall of connecing the silo landing downwards, then via the hole that leaks along the inner wall of storage jar landing downwards at the bottom via the buffer plate gradually wiggling downwards to storage jar, this kind of whereabouts mode, for directly by the mode that the inlet pipe got into the jar internal, the static production volume greatly reduced, effectively prevent its inside gathering static.

Example 2:

the present example differs from example 1 in that: in this embodiment, a gas processing apparatus is additionally provided. The exhaust pipeline 4 is connected with a gas processing device arranged outside the storage tank 1; the gas processing device comprises an adsorption chamber 18, a cooling chamber 13 and a buffer chamber 21 which are arranged in sequence from top to bottom; the cooling chamber 13 is arranged above the storage tank 1, a cooling coil 15 is arranged in the cooling chamber, and water inlets and water outlets of the cooling coil 15 extend to the outside of the cooling chamber 13; water can be introduced into the cooling coil to serve as a coolant, and the water inlet and the water outlet are connected with a circulating water system in a plant area. Wherein the cooling coil can adopt a coiled pipe. The exhaust pipeline 4 is communicated with the cooling chamber 13, an outlet at the top of the cooling chamber 13 is communicated with the adsorption chamber 18, and a non-condensable gas discharge port 19 is arranged at the top of the adsorption chamber 18; a liquid discharge pipeline 14 is arranged at the bottom of the cooling chamber 13, and the liquid discharge pipeline 14 is communicated with the buffer chamber 21; a return pipeline 12 is arranged between the bottom of the buffer chamber 21 and the upper part of the storage tank 1; the adsorption chamber 18 is provided with activated carbon 20.

A first baffle plate 16 and a second baffle plate 17 are arranged in the cooling chamber 13, and the cooling coil 15 sequentially penetrates through the first baffle plate 16 and the second baffle plate 17; the first baffle plate 16 and the second baffle plate 17 divide the cooling chamber 13 into three chambers; the first baffle plate 16 and the second baffle plate 17 are alternately arranged at the bottom and the top of the cooling chamber 13, wherein a gap is formed between the free ends of the first baffle plate 16 and the second baffle plate 17 and the inner wall of the cooling chamber 13; the exhaust pipeline 4 penetrates through the bottom plate of the cooling chamber 13 and extends into the chamber on the side, away from the second baffle plate 17, of the first baffle plate 16, so that airflow is in an S-shaped cooling channel in the cooling chamber 13; the top of the chamber on the side of the second baffle 17 far away from the first baffle 16 is communicated with the adsorption chamber 18 through a pipeline; and the two liquid discharge pipelines 14 are respectively arranged on the bottom plates of the cooling chambers 13 at two sides of the first baffle plate 16. The first partition plate and the second partition plate are arranged to divide the interior of the cooling chamber into a plurality of chambers, so that after airflow enters the cooling chamber from the exhaust pipeline, the S-shaped airflow channel finally enters the adsorption chamber from the non-condensable gas discharge port at the top, and condensed products enter the buffer chamber through the two liquid discharge pipelines at the bottom. The end of the drain line 14 extends to the bottom of the buffer chamber 21. The purpose that so set up is that, the product that stores up in the buffer memory room can play the purpose to flowing back pipeline tip liquid seal, and the air current is with its tip shutoff to noncondensable gas can not down enter into the buffer memory indoor, can only upwards enter into in the adsorption chamber. In addition, all be equipped with the valve about inlet pipe, exhaust duct, flowing back pipeline and noncondensable gas discharge port department, can use with the DCS cooperation, be convenient for workman's in indoor operation. In addition, the pressure gauge and the liquid level meter on the tank body are common monitoring facilities in the prior art, and special emphasis is not required.

An emergency pressure relief opening 3 is formed in the top of the storage tank 1; the emergency pressure relief port 3 and the non-condensable gas discharge port 19 are connected with a torch system. The emergency pressure relief port is additionally arranged at the position, when an emergency accident occurs, the pressure can be quickly reduced from the emergency pressure relief port, the accident is prevented, and the torch system is connected to prevent harmful gas from directly entering the atmospheric environment. Further with regard to the manner in which the flare system is arranged, this is a common configuration of modern plants and therefore the configuration is not described in detail.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An NMP storage device, characterized by: comprising a storage tank (1); a feeding pipe (2) is arranged on a top cover of the storage tank (1), a material receiving groove (5) is formed in the inner wall of the upper portion of the storage tank (1), the end portion of the feeding pipe (2) extends into the material receiving groove (5), and a plurality of material leaking holes (6) are formed in the connecting portion, with the inner wall of the storage tank (1), of the bottom of the material receiving groove (5); a buffer plate (7) which spirally extends downwards around a central shaft of the storage tank (1) is arranged on the inner wall of the storage tank (1), and the lower end of the buffer plate (7) extends to the bottom of the storage tank (1); the upper end part of the buffer plate (7) is positioned below the material receiving groove (5) and is used for receiving materials in the material leaking hole (6); a discharge pipe (11) is arranged at the bottom of the storage tank (1); the outer wall of the storage tank (1) is provided with a grounding wire (10); and a top cover of the storage tank (1) is provided with an exhaust pipeline (4).

2. The NMP storage device of claim 1, wherein: the included angle between the buffer plate (7) and the inner wall of the storage tank (1) above the buffer plate is smaller than 90 degrees.

3. A NMP storage apparatus as claimed in claim 2, wherein: a first baffle (8) is arranged at the higher end of the buffer plate (7), and a second baffle (9) is arranged on one side, away from the side wall of the storage tank (1), of the buffer plate (7); the first baffle (8), the second baffle (9) and the buffer plate (7) form a falling space of the material.

4. The NMP storage device of claim 1, wherein: the exhaust pipeline (4) is connected with a gas processing device arranged outside the storage tank (1); the gas processing device comprises an adsorption chamber (18), a cooling chamber (13) and a buffer chamber (21) which are arranged in sequence from top to bottom; the cooling chamber (13) is arranged above the storage tank (1), a cooling coil (15) is arranged in the cooling chamber, and water inlets and water outlets of the cooling coil (15) extend to the outside of the cooling chamber (13); the exhaust pipeline (4) is communicated with the cooling chamber (13), an outlet at the top of the cooling chamber (13) is communicated with the adsorption chamber (18), and a non-condensable gas discharge port (19) is formed in the top of the adsorption chamber (18); a liquid drainage pipeline (14) is arranged at the bottom of the cooling chamber (13), and the liquid drainage pipeline (14) is communicated with the buffer chamber (21); a return pipeline (12) is arranged between the bottom of the buffer chamber (21) and the upper part of the storage tank (1); and the adsorption chamber (18) is internally provided with activated carbon (20).

5. An NMP storage apparatus as claimed in claim 4, wherein: a first baffle plate (16) and a second baffle plate (17) are arranged in the cooling chamber (13), and the cooling coil (15) sequentially penetrates through the first baffle plate (16) and the second baffle plate (17); the first baffle plate (16) and the second baffle plate (17) divide the cooling chamber (13) into three chambers; the baffle plates I (16) and the baffle plates II (17) are alternately arranged at the bottom and the top of the cooling chamber (13), wherein gaps are formed between the free ends of the baffle plates I (16) and the baffle plates II (17) and the inner wall of the cooling chamber (13); the exhaust pipeline (4) penetrates through the bottom plate of the cooling chamber (13) and extends into a chamber on one side of the baffle plate I (16) far away from the baffle plate II (17), so that airflow is in an S-shaped cooling channel in the cooling chamber (13); the top of the chamber on one side of the second baffle plate (17) far away from the first baffle plate (16) is communicated with the adsorption chamber (18) through a pipeline; and the two liquid discharge pipelines (14) are respectively arranged on the bottom plates of the cooling chambers (13) at the two sides of the baffle plate I (16).

6. An NMP storage apparatus as claimed in claim 4, wherein: the end of the drain line (14) extends to the bottom of the buffer chamber (21).

7. An NMP storage apparatus as claimed in claim 4, wherein: an emergency pressure relief opening (3) is formed in the top of the storage tank (1); the emergency pressure relief port (3) and the non-condensable gas discharge port (19) are connected with a torch system.

8. The NMP storage device of claim 1, wherein: the feeding pipe (2) is a bent pipe; and one end positioned in the material receiving groove (5) extends to the inner wall of the material receiving groove (5).