CN216909780U

CN216909780U - Absorption tower for multistage purification of formaldehyde production

Info

Publication number: CN216909780U
Application number: CN202220756177.4U
Authority: CN
Inventors: 韩利; 高喜斌; 唐基林
Original assignee: Jilin Chuangyuan Chemical Co ltd
Current assignee: Jilin Chuangyuan Chemical Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-08
Anticipated expiration: 2032-04-02

Abstract

An absorption tower for producing multistage purified formaldehyde comprises an absorption tank, wherein a feeding pipe is embedded and installed at the upper end of the outer side of the absorption tank, and a discharging pipe is embedded and installed at the lower end of the outer side of the absorption tank; the dispersing mechanism comprises dispersing rings, the dispersing rings are embedded and mounted on the absorption tank, air inlet pipes are embedded and mounted on the dispersing rings, dispersing sleeves are connected to the inner sides of the two air inlet pipes and communicated with the inner parts of the air inlet pipes, the bottom end of the absorption tank is connected with a motor, the output end of the motor extends into the absorption tank, the output end of the motor is connected with a linkage rod, a filter screen sleeve is connected onto the linkage rod and located inside the dispersing sleeves, the filter screen sleeve is movably connected with the dispersing sleeves through a bearing, and the filter screen sleeve outside the dispersing sleeves is connected with the air inlet pipes; the reflux mechanism is arranged on the absorption tank. This practicality can make formaldehyde give off more evenly in the tourie, has increased formaldehyde and water liquid mixing efficiency.

Description

Absorption tower for multistage purification of formaldehyde production

Technical Field

The utility model relates to the technical field of formaldehyde production, in particular to an absorption tower for multistage purification of formaldehyde.

Background

The production method of formaldehyde is characterized by comprising the following types according to different raw materials: non-catalytic oxidation method using liquefied petroleum gas as raw material, dimethyl ether oxidation method, methane oxidation method and methanol air oxidation method. After the German BASF company realizes the large-scale production of methanol from synthesis gas, the large-scale production of industrial formaldehyde has a good raw material base, and the methanol air oxidation method becomes the most common method for producing industrial formaldehyde. More than 90 percent of industrially produced formaldehyde is prepared by using methanol as a raw material and adopting a methanol air oxidation method. The methanol air oxidation method is classified into a methanol excess oxidation method and an air excess oxidation method, and then, in order to prepare high-concentration formaldehyde and improve the comprehensive utilization efficiency of energy, a tail gas circulation method, a methylal oxidation method and the like are successively developed

The formaldehyde absorption tower is the equipment that absorbs formaldehyde gas, and it is the indispensable partly in the formaldehyde production process, and in actual use, the multi-purpose water liquid of absorption tower and formaldehyde just mix configuration formaldehyde solution, but the position that current formaldehyde got into the pipeline gas outlet is more single, leads to formaldehyde can't give off fast to the absorption tower in to lead to mixing the effect relatively poor, the time is longer, consequently needs design a multistage absorption tower for formaldehyde production.

Disclosure of Invention

The utility model aims to provide an absorption tower for producing multistage purified formaldehyde, which aims to solve the problems that in the prior art, in the actual use, water liquid and formaldehyde which are used for the absorption tower are mixed to prepare a formaldehyde solution, but the position of an air outlet of an existing formaldehyde inlet pipeline is single, so that the formaldehyde cannot be rapidly diffused into the absorption tower, the mixing effect is poor, and the time is long.

An absorption tower for multistage purification of formaldehyde production comprises a device main body, a dispersion mechanism and a reflux mechanism;

the device main body comprises an absorption tank, a feeding pipe is embedded and mounted at the upper end of the outer side of the absorption tank, and a discharging pipe is embedded and mounted at the lower end of the outer side of the absorption tank;

the dispersing mechanism comprises dispersing rings, the dispersing rings are embedded and mounted on the absorption tank, air inlet pipes are embedded and mounted on the dispersing rings, the number of the air inlet pipes is two, the inner sides of the two air inlet pipes are connected with dispersing sleeves, the dispersing sleeves are communicated with the interiors of the air inlet pipes, the bottom end of the absorption tank is connected with a motor, the output end of the motor extends into the absorption tank, the output end of the motor is connected with a linkage rod, the linkage rod is connected with a filter screen sleeve pipe, the filter screen sleeve pipe is located inside the dispersing sleeves, the filter screen sleeve pipe is movably connected with the dispersing sleeves through bearings, the filter screen sleeve pipe on the outer side of the dispersing sleeves is connected with the air dispersing pipes, and the number of the air dispersing pipes is four;

the backflow mechanism is arranged on the absorption tank.

Preferably, a liquid level pipe is embedded into one side of the absorption tank and made of transparent materials, and scale marks are uniformly arranged on the surface of the liquid level pipe.

Preferably, the linkage rod at one end of the dispersing sleeve is uniformly connected with stirring blades, and the stirring blades are provided with pressure reducing holes.

Preferably, the return mechanism includes the water pump, and the water pump is connected on the absorption tank, and the input of water pump is connected with first return pipe, and the lower extreme in absorption tank one side is connected in the embedding of first return pipe, and the output of water pump is connected with the second return pipe, and the upper end in absorption tank one side is connected in the embedding of second return pipe.

Preferably, the output end of the second return pipe is connected with a spray pipe, the spray pipe is positioned inside the absorption tank, the spray pipe is in a spiral shape, and the spray pipe is uniformly connected with atomizing nozzles.

Preferably, the inner surface of the absorption tank at the lower end of the water spraying pipe is connected with two stabilizing strips, and the inner ends of the two stabilizing strips are provided with sponge blocks.

Compared with the prior art, the utility model has the beneficial effects that:

through being provided with dispersion cover, filter screen sleeve pipe, air diffusing pipe and motor, utilize the motor to make filter screen sleeve pipe and air diffusing pipe take place the rotation like this, utilize dispersion cover to add the filter screen sleeve pipe with formaldehyde gas simultaneously to make it evenly distribute through pivoted air diffusing pipe, compare with prior art, this device can make formaldehyde distribute more evenly in the absorption tank, increase its and water liquid mixing efficiency.

Drawings

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

FIG. 2 is a front perspective exploded view of the present invention;

FIG. 3 is a rear perspective exploded view of the present invention;

fig. 4 is an exploded perspective view of the dispersion sleeve of the present invention.

In the figure: 1-a device body; 110-an absorption tank; 111-liquid level tube; 2-a dispersing mechanism; 210-a dispersing ring; 211-inlet pipe; 212-a motor; 213-linkage rod; 214-a dispersing sleeve; 215-screen sleeve; 216-a diffuser pipe; 217-stirring blade; 3-a reflux mechanism; 310-a first return pipe; 311-a water pump; 312-a second return conduit; 313-a spray pipe; 314-a stabilizing strip; 315-sponge block.

Detailed Description

Referring to fig. 1 to 4, an absorption tower for producing multistage purified formaldehyde comprises a main body 1, a dispersing mechanism 2 and a reflux mechanism 3;

the device main body 1 comprises an absorption tank 110, a feeding pipe is embedded and installed at the upper end of the outer side of the absorption tank 110, and a discharging pipe is embedded and installed at the lower end of the outer side of the absorption tank 110;

the dispersing mechanism 2 comprises dispersing rings 210, the dispersing rings 210 are embedded in the absorption tank 110, the dispersing rings 210 are embedded with air inlet pipes 211, the number of the air inlet pipes 211 is two, the inner sides of the two air inlet pipes 211 are connected with dispersing sleeves 214, the dispersing sleeves 214 are communicated with the inner parts of the air inlet pipes 211, the bottom end of the absorption tank 110 is connected with a motor 212, the output end of the motor 212 extends into the absorption tank 110, the output end of the motor 212 is connected with a linkage rod 213, the linkage rod 213 is connected with a filter screen sleeve 215, the filter screen sleeve 215 is positioned in the dispersing sleeves 214, the filter screen sleeve 215 is movably connected with the dispersing sleeves 214 through a bearing, the filter screen sleeve 215 on the outer side of the dispersing sleeve 214 is connected with air dispersing pipes 216, and the number of the air dispersing pipes 216 is four;

the backflow mechanism 3 is arranged on the absorption tank 110, so that the filter screen sleeve 215 and the air dispersing pipe 216 rotate by using the motor 212, and the formaldehyde gas is added into the filter screen sleeve 215 by using the dispersing sleeve 214, so that the formaldehyde gas is uniformly dispersed through the rotating air dispersing pipe 216.

Furthermore, a liquid level pipe 111 is embedded into one side of the absorption tank 110, the liquid level pipe 111 is made of transparent material, and scale marks are uniformly arranged on the surface of the liquid level pipe 111, so that the liquid level height in the liquid level pipe 111 is used for assisting a worker in judging the amount of the solution in the absorption tank 110.

Further, the linkage rod 213 at one end of the dispersing sleeve 214 is uniformly connected with the stirring blades 217, and the stirring blades 217 are provided with pressure reducing holes, so that the linkage rod 213 is utilized to drive the stirring blades 217 to rotate, and the stirring blades 217 can stir the solution to accelerate mixing.

Further, the backflow mechanism 3 comprises a water pump 311, the water pump 311 is connected to the absorption tank 110, an input end of the water pump 311 is connected with a first backflow pipe 310, the first backflow pipe 310 is embedded in and connected to a lower end of one side of the absorption tank 110, an output end of the water pump 311 is connected with a second backflow pipe 312, and the second backflow pipe 312 is embedded in and connected to an upper end of one side of the absorption tank 110, so that the solution can circulate inside the absorption tank 110, and water and methane can be fully mixed.

Furthermore, the output end of the second return pipe 312 is connected with a spray pipe 313, the spray pipe 313 is located inside the absorption tank 110, the spray pipe 313 is in a spiral shape, and the spray pipe 313 is uniformly connected with atomizing nozzles, so that the dispersion effect of the circulating water liquid can be increased, and the mixing of the circulating water liquid and the atomizing nozzles is further ensured.

Further, the inner surface of the absorption tank 110 at the lower end of the water spraying pipe 313 is connected with two stabilizing strips 314, the inner ends of the two stabilizing strips 314 are provided with the sponge blocks 315, so that the water absorption effect of the sponge blocks 315 is utilized to capture water, and the contact effect with formaldehyde is improved.

The working process of the utility model is as follows:

when the formaldehyde dispersing device is used, water is added into the absorption tank 110 from the feeding pipe at the upper end, then the water pump 311 is started, so that the water pump 311 pumps water out of the absorption tank 110, the water is discharged through the second return pipe 312 and the water spraying pipe 313 and then returns to the absorption tank 110, then the motor 212 is started, formaldehyde is added through the air inlet pipe 211, at the moment, the motor 212 drives the linkage rod 213 and the filter screen sleeve 215 to rotate, the formaldehyde enters the dispersing sleeve 214 from the air inlet pipe 211, and the air velocity and the pressure at the opening of the air dispersing pipe 216 are reduced due to the fact that the air dispersing pipe 216 rotates along with the filter screen sleeve 215, so that the formaldehyde flows through the filter screen sleeve 215 to the opening of the air dispersing pipe 216 and is finally dispersed.

After the processing is finished, discharging is carried out through a discharging pipe at the lower end.

Claims

1. The utility model provides a multistage absorption tower for formaldehyde production that purifies which characterized in that: comprises a device main body (1), a dispersion mechanism (2) and a reflux mechanism (3);

the device main body (1) comprises an absorption tank (110), a feeding pipe is embedded and installed at the upper end of the outer side of the absorption tank (110), and a discharging pipe is embedded and installed at the lower end of the outer side of the absorption tank (110);

the dispersing mechanism (2) comprises dispersing rings (210), the dispersing rings (210) are embedded in an absorption tank (110), air inlet pipes (211) are embedded in the dispersing rings (210), the number of the air inlet pipes (211) is two, dispersing sleeves (214) are connected to the inner sides of the two air inlet pipes (211), the dispersing sleeves (214) are communicated with the inner portions of the air inlet pipes (211), a motor (212) is connected to the bottom end of the absorption tank (110), the output end of the motor (212) extends into the absorption tank (110), a linkage rod (213) is connected to the output end of the motor (212), a filter screen sleeve (215) is connected to the linkage rod (213), the filter screen sleeve (215) is located inside the dispersing sleeves (214), the filter screen sleeve (215) is movably connected with the dispersing sleeves (214) through a bearing, the filter screen sleeve (215) on the outer side of the dispersing sleeves (214) is connected with the air dispersing pipes (216), and the number of the air dispersing pipes (216) is four;

the backflow mechanism (3) is arranged on the absorption tank (110).

2. The absorption tower for multistage purification of formaldehyde for production according to claim 1, wherein the absorption tower comprises: a liquid level pipe (111) is embedded into one side of the absorption tank (110), the liquid level pipe (111) is made of transparent materials, and scale marks are uniformly arranged on the surface of the liquid level pipe (111).

3. The absorption tower for multistage purification of formaldehyde for production according to claim 1, wherein the absorption tower comprises: the linkage rod (213) at one end of the dispersing sleeve (214) is uniformly connected with stirring blades (217), and the stirring blades (217) are provided with pressure reducing holes.

4. The absorption tower for multistage purification of formaldehyde for production according to claim 1, wherein the absorption tower comprises: the backflow mechanism (3) comprises a water pump (311), the water pump (311) is connected to the absorption tank (110), the input end of the water pump (311) is connected with a first backflow pipe (310), the first backflow pipe (310) is connected to the lower end of one side of the absorption tank (110) in an embedded mode, the output end of the water pump (311) is connected with a second backflow pipe (312), and the second backflow pipe (312) is connected to the upper end of one side of the absorption tank (110) in an embedded mode.

5. The absorption tower for multistage purification of formaldehyde for production according to claim 4, wherein the absorption tower comprises: the output end of the second return pipe (312) is connected with a spray pipe (313), the spray pipe (313) is positioned inside the absorption tank (110), the spray pipe (313) is in a spiral shape, and the spray pipe (313) is uniformly connected with atomizing nozzles.

6. The absorption tower for multistage purification of formaldehyde for production according to claim 5, wherein: the inner surface of the absorption tank (110) at the lower end of the water spraying pipe (313) is connected with two stabilizing strips (314), and the inner ends of the two stabilizing strips (314) are provided with sponge blocks (315).