CN215654577U

CN215654577U - A dichloromethane recovery unit for fine chemical production

Info

Publication number: CN215654577U
Application number: CN202121642202.8U
Authority: CN
Inventors: 柴占永; 柯军; 李洪旭; 吴丹; 兰杏芬; 马巧巧
Original assignee: Tianjin Jingye Fine Chemicals Co ltd
Current assignee: Tianjin Jingye Fine Chemicals Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-01-28
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to a dichloromethane recovery device for fine chemical production, which comprises a bottom plate, a cooling box and an adsorption box, wherein the cooling box and the adsorption box are arranged above the bottom plate, the top of the bottom plate is respectively provided with a first recovery box and a second recovery box for recovering dichloromethane liquid and an adsorbent, the cooling box is arranged on the first recovery box, the adsorption box is arranged on the second recovery box, a spiral cooling pipeline is arranged in the cooling box, circulating cooling water is arranged in the cooling box, a liquid guide pipe penetrating into the first recovery box is arranged at an outlet at the bottom of the cooling pipeline, an air inlet pipe penetrating out of the cooling box is arranged at an inlet at the top of the cooling pipeline, one side of the liquid guide pipe is connected with an air guide pipe penetrating out of the cooling box and connected with the bottom of the adsorption box, a discharge pipe penetrating into the second recovery box is arranged at the bottom of the adsorption box, a stirring mechanism is arranged in the adsorption box, a heating mechanism is arranged on the stirring mechanism, and an exhaust pipe is arranged on the adsorption box and is provided with a communicating pipe connected with the air inlet pipe. The utility model has good dichloromethane recovery effect and convenient use.

Description

A dichloromethane recovery unit for fine chemical production

Technical Field

The utility model relates to the field of fine chemical engineering, in particular to a dichloromethane recovery device for fine chemical engineering production.

Background

Methylene dichloride gas is generated in the production process of the medical intermediate, the methylene dichloride is colorless and transparent liquid which is very volatile and has irritant aromatic smell, the boiling point is low, the methylene dichloride is insoluble in water and mutually soluble with most common organic solvents, and the methylene dichloride is toxic to human bodies and seriously pollutes the atmosphere, so that the methylene dichloride is very necessary to be recovered. The common dichloromethane recovery method comprises a condensation method, an adsorption method and the like, and in the existing dichloromethane recovery device, during condensation, condensed liquid is easy to stay in the device, is inconvenient to take out and troublesome to clean, and is generally adsorbed by an adsorption tower, and an adsorbent in the tower is inconvenient to replace.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provides a dichloromethane recovery device for fine chemical production.

In order to achieve the purpose, the utility model adopts the following technical scheme: a dichloromethane recovery device for fine chemical production comprises a bottom plate, a cooling box and an adsorption box which are arranged above the bottom plate, wherein the adsorption box is fixedly arranged on one side of the cooling box, the top of the bottom plate is respectively provided with a first recovery box and a second recovery box which are used for recovering dichloromethane liquid and an adsorbent, the cooling box is arranged on the first recovery box, the adsorption box is arranged on the second recovery box, a spiral cooling pipeline is arranged in the cooling box, circulating cooling water is arranged in the cooling box, a liquid guide pipe penetrating into the first recovery box is arranged at an outlet at the bottom of the cooling pipeline, an air inlet pipe penetrating out of the cooling box is arranged at an inlet at the top of the cooling pipeline, a first valve is arranged on the air inlet pipe, one side of the liquid guide pipe is connected with an air guide pipe penetrating out of the cooling box and connected with the bottom of the adsorption box, the adsorbent is filled in the adsorption box, one side of the adsorption box is provided with a feed pipe, and the bottom of the adsorption box is provided with a discharge pipe penetrating into the second recovery box, the feeding pipe and the discharging pipe are provided with a second valve, the adsorption tank is internally provided with a stirring mechanism, the stirring mechanism is provided with a heating mechanism, the adsorption tank is provided with a vent pipe, the vent pipe is provided with a communicating pipe connected with the air inlet pipe, and the vent pipe and the communicating pipe are provided with a third valve.

Particularly, a plurality of fixing rods are arranged between the cooling pipeline and the inner wall of the cooling box.

Particularly, the top and the bottom of one side of the cooling tank are respectively provided with a water inlet and a water outlet for the inlet and the outlet of cooling water, and the water inlet and the water outlet are connected with a circulating water cooler.

In particular, each layer of tubes of the cooling duct is arranged obliquely downwards.

In particular, a filter screen is arranged at the outlet of the air duct.

Particularly, the front sides of the first recovery box and the second recovery box are hinged with sealing covers, a first recovery groove is arranged in the first recovery box, a second recovery groove is arranged in the second recovery box, the first recovery groove is positioned below the liquid guide pipe, and the second recovery groove is positioned below the discharge pipe.

Especially, adsorption box inner wall upper portion is equipped with the baffle, and the inlet pipe is located the baffle below, and the blast pipe is located on the baffle and is worn out the adsorption box.

Particularly, the stirring mechanism comprises a stirring shaft which is rotatably connected to the center of the bottom of the partition plate, a plurality of pairs of stirring rods which are fixedly connected to the stirring shaft, stirring lining plates which are fixedly connected to the upper side and the lower side of the stirring rods in a staggered mode, arc-shaped stirring blades which are arranged at the bottom of the stirring shaft, and a motor which is arranged on the partition plate and drives the stirring shaft to rotate.

Particularly, an electric slip ring is arranged at the center of the top in the adsorption box, the stirring shaft penetrates out of the partition plate and is connected with a rotor of the electric slip ring, the motor and the stirring shaft are in gear transmission, a threading pipe is arranged at the top of one side of the adsorption box, and a wire on the electric slip ring and a wire on the motor penetrate out of the threading pipe.

Particularly, cavities communicated with each other are arranged in the stirring shaft, the stirring rod, the stirring lining plate and the stirring blade, electric heating wires are laid in the cavities and connected with wires on a rotor of the electric slip ring.

The utility model has the beneficial effects that: according to the utility model, the cooling tank, the adsorption tank, the cold removal pipeline, the stirring mechanism, the heating mechanism, the first recovery tank, the second recovery tank, the first recovery tank and the second recovery tank are arranged, so that dichloromethane gas is convenient to recover, the recovery effect is good, the recovered dichloromethane liquid is convenient to take out, and the adsorbent is convenient to replace.

Drawings

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

in the figure: 1-a bottom plate; 2-a first recycling box; 3-a first recovery tank; 4-water outlet; 5-a catheter; 6-gas guide tube; 7-a cooling box; 8-a cooling pipeline; 9-fixing the rod; 10-a water inlet; 11-an air inlet pipe; 12-a communicating tube; 13-a separator; 14-an exhaust pipe; 15-an electrical slip ring; 16-an adsorption tank; 17-a motor; 18-a threading tube; 19-a feed pipe; 20-a stirring rod; 21-stirring lining plate; 22-an electric heating wire; 23-stirring blade; 24-a discharge pipe; 25-a second recycling box; 26-a second recovery tank; 27-a stirring shaft;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in figure 1, a dichloromethane recovery device for fine chemical production comprises a bottom plate 1, a cooling tank 7 and an adsorption tank 16 which are arranged above the bottom plate 1, wherein the adsorption tank 16 is fixedly arranged on one side of the cooling tank 7, the top of the bottom plate 1 is respectively provided with a first recovery tank 2 and a second recovery tank 25 which are used for recovering dichloromethane liquid and an adsorbent, the cooling tank 7 is arranged on the first recovery tank 2, the adsorption tank 16 is arranged on the second recovery tank 25, the front sides of the first recovery tank 2 and the second recovery tank 25 are respectively hinged with a sealing cover, a first recovery tank 3 is arranged in the first recovery tank 2, a second recovery tank 26 is arranged in the second recovery tank 25,

a spiral cooling pipeline 8 is arranged in the cooling box 7, a plurality of fixing rods 9 are arranged between the cooling pipeline 8 and the inner wall of the cooling box 7, circulating cooling water is arranged in the cooling box 7, a water inlet 10 and a water outlet 4 for the cooling water to enter and exit are respectively arranged at the top and the bottom of one side of the cooling box 7, the water inlet 10 and the water outlet 4 are connected with a circulating water cooler, a liquid guide pipe 5 penetrating into a first recovery box 2 is arranged at an outlet at the bottom of the cooling pipeline 8, a first recovery tank 3 is positioned below the liquid guide pipe 5, an air inlet pipe 11 penetrating out of the cooling box 7 is arranged at an inlet at the top of the cooling pipeline 8, a first valve is arranged on the air inlet pipe 11, each layer of pipes of the cooling pipeline 8 is obliquely arranged downwards,

specifically, cooling water flows circularly along the water inlet 10, the cooling tank 7, the water outlet 4, the circulating water cooler and the water inlet 10 in sequence to ensure that the cooling tank 7 keeps low temperature, so that dichloromethane gas is condensed into liquid conveniently, and because each layer of pipe of the cooling pipeline 8 is arranged in a downward inclined manner, the condensed liquid flows downwards and flows into the first recovery tank 3 through the liquid guide pipe 5,

one side of the liquid guide pipe 5 is connected with an air guide pipe 6 which penetrates out of the cooling box 7 and is connected with the bottom of the adsorption box 16, the adsorption box 16 is filled with adsorbent which can be active carbon particles, a filter screen is arranged at the outlet of the air guide pipe 6 to prevent the adsorbent from entering the air guide pipe 6, one side of the adsorption box 16 is provided with a feed pipe 19, the bottom of the adsorption box 16 is provided with a discharge pipe 24 which penetrates into a second recovery box 25, a second recovery tank 26 is positioned below the discharge pipe 24, the feed pipe 19 and the discharge pipe 24 are provided with a second valve, the adsorption box 16 is provided with an exhaust pipe 14, the exhaust pipe 14 is provided with a communicating pipe 12 which is connected with an air inlet pipe 11, the exhaust pipe 14 and the communicating pipe 12 are provided with a third valve, the upper part of the inner wall of the adsorption box 16 is provided with a partition plate 13, the feed pipe 19 is positioned below the partition plate 13, and the exhaust pipe 14 is arranged on the partition plate 13 and penetrates out of the adsorption box 16,

specifically, after the condensed gas enters the adsorption tank 16 through the gas guide tube 6, dichloromethane in the gas is absorbed by the adsorbent and then discharged through the exhaust tube 14, after the dichloromethane is absorbed by the adsorbent, the dichloromethane is heated and eluted from the adsorbent due to low boiling point of the dichloromethane, then enters the cooling tank 7 through the communicating tube 12, is condensed into liquid again and is recovered,

a stirring mechanism is arranged in the adsorption box 16, a heating mechanism is arranged on the stirring mechanism, the stirring mechanism comprises a stirring shaft 27 rotatably connected with the center of the bottom of the partition plate 13, a plurality of pairs of stirring rods 20 fixedly connected on the stirring shaft 27, stirring lining plates 21 fixedly connected on the upper side and the lower side of the stirring rods 20 in a staggered manner, an arc-shaped stirring blade 23 arranged at the bottom of the stirring shaft 27, and a motor 17 arranged on the partition plate 13 and used for driving the stirring shaft 27 to rotate, an electric slip ring 15 is arranged at the center of the inner top of the adsorption box 16, the stirring shaft 27 penetrates out of the partition plate 13 and is connected with a rotor of the electric slip ring 15, the motor 17 and the stirring shaft 27 are in gear transmission, a threading pipe 18 is arranged at the top of one side of the adsorption box 16, a wire on the electric slip ring 15 and the motor 17 penetrates out of the threading pipe 18, a cavity communicated with the stirring shaft 27, the stirring rods 20, the stirring lining plates 21 and the stirring blades 23 are internally provided with electric heating wires 22, the electric heating wires 22 are laid in the cavity and connected with the rotor of the electric slip ring 15,

specifically, the adsorbent stirs under the rabbling mechanism effect, abundant and gas contact, the dichloromethane absorbs more fully, and when needing to heat the elution, electric heating wire 22 circular telegram heating, because the stirring of rabbling mechanism, make the adsorbent heat fully, the dichloromethane elution is effectual, adsorbent after the use is arranged to two 26 interior in the accumulator through discharging pipe 24 can, if further improve the rate of recovery, can add a fan, let gas under the fan effect between cooler bin 7 and adsorption tank 16 the repetitive cycle many times can.

The utility model has the advantages of convenient recovery of dichloromethane, repeated gas recovery between condensation recovery and adsorption recovery, sufficient recovery, good recovery effect and convenient taking out of the recovery liquid and the adsorbent.

The utility model has been described in connection with the accompanying drawings, it is to be understood that the utility model is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the utility model, and all such modifications and variations are within the scope of the utility model.

Claims

1. The utility model provides a dichloromethane recovery unit for fine chemical production, comprising a base plate (1), locate cooler bin (7) and adsorption tank (16) above base plate (1), a serial communication port, adsorption tank (16) sets firmly in cooler bin (7) one side, base plate (1) top is equipped with collection box one (2) and collection box two (25) that are used for retrieving dichloromethane liquid and adsorbent respectively, cooler bin (7) are located on collection box one (2), adsorption tank (16) are located on collection box two (25), be equipped with spiral helicine cooling tube (8) in cooler bin (7), be equipped with circulating cooling water in cooler bin (7), cooling tube (8) bottom exit is equipped with catheter (5) of wearing into in collection box one (2), cooling tube (8) top import department is equipped with intake pipe (11) of wearing out cooler bin (7), be equipped with valve one on intake pipe (11), catheter (5) one side is connected with and wears out cooler bin (7) and air duct (6) of being connected with adsorption tank (16) bottom, adsorption tank (16) intussuseption is filled with the adsorbent, adsorption tank (16) one side is equipped with inlet pipe (19), adsorption tank (16) bottom is equipped with and wears into discharging pipe (24) in collection box two (25), be equipped with valve two on inlet pipe (19) and discharging pipe (24), be equipped with rabbling mechanism in adsorption tank (16), the last heating mechanism that is equipped with of rabbling mechanism, be equipped with blast pipe (14) on adsorption tank (16), and be equipped with communicating pipe (12) of being connected with intake pipe (11) on blast pipe (14), be equipped with valve three on blast pipe (14) and communicating pipe (12).

2. The apparatus for recovering methylene chloride used in the fine chemical production according to claim 1, wherein a plurality of fixing rods (9) are provided between the cooling pipe (8) and the inner wall of the cooling tank (7).

3. The dichloromethane recovery device for fine chemical production according to claim 2, characterized in that the top and the bottom of one side of the cooling tank (7) are respectively provided with a water inlet (10) and a water outlet (4) for the inlet and outlet of cooling water, and the water inlet (10) and the water outlet (4) are connected with a circulating water cooler.

4. The apparatus for recovering methylene chloride used in the production of fine chemicals according to claim 3, wherein each layer of the pipes of the cooling pipe (8) is disposed to be inclined downward.

5. The dichloromethane recovery device for fine chemical production according to claim 4, characterized in that a filter screen is arranged at the outlet of the gas-guide tube (6).

6. The dichloromethane recovery device for fine chemical production according to claim 5, wherein the front sides of the first recovery tank (2) and the second recovery tank (25) are hinged with sealing covers, the first recovery tank (3) is placed in the first recovery tank (2), the second recovery tank (26) is placed in the second recovery tank (25), the first recovery tank (3) is located below the liquid guide pipe (5), and the second recovery tank (26) is located below the discharge pipe (24).

7. The dichloromethane recovery device for fine chemical production according to claim 6, characterized in that the upper part of the inner wall of the adsorption tank (16) is provided with a partition plate (13), the feeding pipe (19) is positioned below the partition plate (13), and the exhaust pipe (14) is arranged on the partition plate (13) and penetrates out of the adsorption tank (16).

8. The dichloromethane recovery device for the fine chemical production according to claim 7, wherein the stirring mechanism comprises a stirring shaft (27) rotatably connected to the center of the bottom of the partition plate (13), a plurality of pairs of stirring rods (20) fixedly connected to the stirring shaft (27), stirring lining plates (21) fixedly connected to the upper and lower sides of the stirring rods (20) in a staggered manner, arc-shaped stirring blades (23) arranged at the bottom of the stirring shaft (27), and a motor (17) arranged on the partition plate (13) and driving the stirring shaft (27) to rotate.

9. The dichloromethane recovery device for fine chemical production according to claim 8, wherein an electric slip ring (15) is arranged at the center of the inner top of the adsorption tank (16), the stirring shaft (27) penetrates through the partition plate (13) and is connected with a rotor of the electric slip ring (15), the motor (17) and the stirring shaft (27) are in gear transmission, the top of one side of the adsorption tank (16) is provided with a threading pipe (18), and the threading pipes (18) penetrate through the electric slip ring (15) and a conducting wire on the motor (17).

10. The dichloromethane recovery device for fine chemical production according to claim 9, wherein cavities communicated with each other are arranged inside the stirring shaft (27), the stirring rod (20), the stirring lining plate (21) and the stirring blade (23), an electric heating wire (22) is laid in the cavities, and the electric heating wire (22) is connected with a lead on a rotor of the electric slip ring (15).