CN218188852U

CN218188852U - Carbon dioxide compressor arrangement of urea production

Info

Publication number: CN218188852U
Application number: CN202222152779.1U
Authority: CN
Inventors: 赵俊豪; 陈昱丹
Original assignee: Henan Jinkong Tianqing Coal Chemical Co Ltd
Current assignee: Henan Jinkong Tianqing Coal Chemical Co Ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2023-01-03
Anticipated expiration: 2032-08-16

Abstract

The utility model relates to the technical field of urea production devices, in particular to a carbon dioxide compression device for urea production, which comprises a three-way pipe, wherein two outlet ends of the three-way pipe are communicated with inlet ends of two groups of gas pretreatment devices in a one-to-one correspondence manner, the outlet ends of the two groups of gas pretreatment devices are communicated with a same air duct, and the air duct is communicated with a centrifugal compressor body; each group of the gas pretreatment devices comprises inlet ends of gas supply pipes integrally communicated with outlet ends of the three-way pipes, the outlet ends of the gas supply pipes are detachably connected with inlet ends of treatment cylinders, the outlet ends of the treatment cylinders are detachably connected with inlet ends of gas supply pumps, the outlet ends of the gas supply pumps are communicated with the gas guide pipes, the inner walls of the treatment cylinders are coaxially and fixedly connected with two filter boxes which are symmetrically arranged from top to bottom, activated carbon is filled in each filter box, supporting nets are coaxially and fixedly connected in the treatment cylinders, drying bags are arranged on the supporting nets, and drying agents are filled in the drying bags.

Description

Carbon dioxide compressor arrangement of urea production

Technical Field

The utility model relates to a urea apparatus for producing technical field, especially a carbon dioxide compressor arrangement of urea production.

Background

The urea section is an important section in the chemical fertilizer production process flow. In the urea synthesis section, high-pressure carbon dioxide gas from a carbon dioxide compressor reacts with high-pressure liquid ammonia from an ammonia pump in a urea synthesis tower to generate low-concentration urine, and the urine is decomposed, evaporated and granulated to finally obtain a urea product.

The carbon dioxide for synthesizing the urea is mainly obtained from water gas and then enters a compressor through procedures of low-temperature methanol washing and the like, the carbon dioxide prepared and washed in the way contains certain moisture, the carbon dioxide containing the moisture enters the compressor and is compressed for a long time to generate water drops, the water drops are accumulated to narrow a passage and influence the flow of the carbon dioxide, and the water drops can cause corrosion and other damages to parts of the compressor. In addition, carbon dioxide may contain other impurities that may block the passages. Therefore, a compressor with water and impurity removing functions is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a carbon dioxide compression device for urea production, which solves the technical scheme that the device comprises a three-way pipe and two groups of gas pretreatment devices, wherein the three-way pipe comprises an inlet end and two outlet ends, the two outlet ends of the three-way pipe are communicated with the inlet ends of the two groups of gas pretreatment devices in a one-to-one correspondence manner, the outlet ends of the two groups of gas pretreatment devices are communicated with a same gas guide pipe together, and the gas guide pipe is communicated with a centrifugal compressor body;

each group of gas pretreatment devices comprises inlet ends of gas supply pipes integrally communicated with outlet ends of the three-way pipes, the outlet ends of the gas supply pipes are detachably connected with inlet ends of treatment cylinders, the outlet ends of the treatment cylinders are detachably connected with inlet ends of gas supply pumps, the outlet ends of the gas supply pumps are communicated with the gas guide pipes, the inner walls of the treatment cylinders are coaxially and fixedly connected with two filter boxes which are symmetrically arranged from top to bottom, activated carbon is filled in each filter box, supporting nets are coaxially and fixedly connected in the treatment cylinders, drying bags are arranged on the supporting nets, and drying agents are filled in the drying bags.

Preferably, each of the drying bags is made of a breathable absorbent cotton material.

Preferably, the upper end and the lower end of each filter box are provided with a plurality of uniformly distributed air holes.

Preferably, a front electromagnetic valve is mounted at each of the two outlet ends of the three-way pipe, and a rear electromagnetic valve is mounted at each of the outlet ends of the air pumps.

Preferably, an outlet end of each air feed pipe is coaxially and fixedly connected with an upper flange, an inlet end of each treatment cylinder is coaxially and fixedly connected with an upper flange which can correspond to the upper flange, an outlet end of each treatment cylinder is coaxially and fixedly connected with a lower flange, and an inlet end of each air feed pump is coaxially and fixedly connected with a lower flange which can correspond to the lower flange.

The utility model has the advantages that:

the utility model discloses when using, the gaseous preceding processing apparatus that is equipped with can handle moisture wherein before carbon dioxide gets into the centrifugal compressor body, and the drying bag of the cotton material of washing water that is equipped with is convenient for absorb the carbon dioxide that contains moisture among the gaseous preceding processing apparatus that is equipped with, and the drier in the drying bag can further carry out the drying to moisture, and the active carbon of filling can adsorb in the carbon dioxide peculiar smell and foreign matter simultaneously in the filter cartridge, avoids it to carry out the compressor and causes the influence. Two sets of gas pretreatment devices that are equipped with are one-used one and one-ready, when a set of problem or need overhaul earlier, can use another group to carry out the leading processing of carbon dioxide, avoid influencing normal production. The treatment cylinder is detachably connected between the air supply pipe and the air supply pump in a flange connection mode so as to be conveniently detached and replaced, and the using effect of the active carbon and the drying agent is ensured.

Drawings

Fig. 1 is a front view of the utility model.

Fig. 2 is an enlarged view of the area a in the main body view of the present invention.

Fig. 3 is a first perspective view of the present invention.

Reference numerals

1. The device comprises a three-way pipe, 2 a gas pretreatment device, 3 an air guide pipe, 4 a centrifugal compressor body, 5 an air supply pipe, 6 a treatment cylinder, 7 an air supply pump, 8 a filter box, 9 active carbon, 10 a support net, 11 a drying bag, 12 air holes, 13 a front electromagnetic valve, 14 a rear electromagnetic valve, 15 an upper flange, 16 upper flanges, 17 lower flanges and 18 lower flanges.

Detailed Description

The following description of the present invention will be made in detail with reference to the accompanying drawings 1 to 3.

Embodiment one, its technical scheme who solves is, the utility model discloses when using, gaseous preceding processing apparatus 2 that is equipped with can handle moisture wherein before carbon dioxide gets into centrifugal compressor body 4, the drying bag 11 of the cotton material of washing water that is equipped with is convenient for absorb the carbon dioxide that contains moisture in the gaseous preceding processing apparatus 2 that is equipped with, drier in the drying bag 11 can further carry out the drying to moisture, the activated carbon 9 of packing in the filter box 8 can adsorb carbon dioxide in peculiar smell and foreign matter simultaneously, avoids it to carry out the compressor and causes the influence. Two sets of gas pretreatment device 2 that are equipped with are one used and one prepared, when a set of problem or need overhaul earlier, can use another group to carry out the leading processing of carbon dioxide, avoid influencing normal production. The treatment cylinder 6 is detachably connected between the air supply pipe 5 and the air supply pump 7 through a flange connection mode, so that the treatment cylinder can be conveniently detached and replaced, and the using effect of the active carbon 9 and the drying agent can be guaranteed.

Embodiment two, on the basis of embodiment one, the utility model discloses when using, carbon dioxide gas is through the entrance point input of three-way pipe 1, later is sent into centrifugal compressor body 4 through gaseous preceding processing apparatus 2 and air duct 3 and is carried out compression treatment. Specifically, in practical use, the front electromagnetic valve 13 and the rear electromagnetic valve 14 in one group of the gas pretreatment device 2 are both in a closed state, which is a standby group; the front electromagnetic valve 13 and the rear electromagnetic valve 14 in the other group of gas pretreatment devices 2 are both in an open state, which is a working group, carbon dioxide gas enters the gas feed pipe 5 of the working group through the outlet end of the three-way pipe 1, and the gas feed pump 7 can attract the carbon dioxide gas to flow to the gas guide pipe 3 so as to facilitate the carbon dioxide gas to enter the centrifugal compressor body 4. The carbon dioxide gas that gets into air feed pipe 5 gets into treatment section of thick bamboo 6 under the attraction of air feed pump 7, and bleeder vent 12 has all been seted up at the filter 8 upper and lower both ends that are equipped with in the treatment section of thick bamboo 6 to gaseous through filtering box 8, the active carbon 9 that is equipped with in the filter box 8 can adsorb impurity such as foreign matter in the carbon dioxide, avoids impurity entering centrifugal compressor body 4 to cause the jam. A drying bag 11 is arranged on a supporting net 10 arranged in the treatment cylinder 6, and the drying agent in the drying bag 11 can remove moisture in the carbon dioxide gas.

In the third embodiment, on the basis of the first embodiment, the outlet end of each air feed pipe 5 is coaxially and fixedly connected with an upper flange 15, the inlet end of each treatment cylinder 6 is coaxially and fixedly connected with an upper flange 16 capable of corresponding to the upper flange 15, the outlet end of each treatment cylinder 6 is coaxially and fixedly connected with a lower flange 17, and the inlet end of each air feed pump 7 is coaxially and fixedly connected with a lower flange 18 capable of corresponding to the lower flange 17. The upper flange 15 and the upper flange 16 and the lower flange 17 and the lower flange 18 can be detachably connected through bolts, so that the treatment cylinder 6 can be conveniently detached.

Claims

1. The carbon dioxide compression device for urea production is characterized by comprising a three-way pipe (1) and two groups of gas pretreatment devices (2), wherein the three-way pipe (1) comprises an inlet end and two outlet ends, the two outlet ends of the three-way pipe (1) are correspondingly communicated with the inlet ends of the two groups of gas pretreatment devices (2) one by one, the outlet ends of the two groups of gas pretreatment devices (2) are communicated with the same gas guide pipe (3), and the gas guide pipe (3) is communicated with a centrifugal compressor body (4);

each group of gas pretreatment device (2) comprises an inlet end of a gas supply pipe (5) integrally communicated with the outlet end of the three-way pipe (1), the outlet end of each gas supply pipe (5) is detachably connected with an inlet end of a treatment cylinder (6), the outlet end of each treatment cylinder (6) is detachably connected with an inlet end of a gas supply pump (7), the outlet end of the gas supply pump (7) is communicated with the gas guide pipe (3), the inner wall of each treatment cylinder (6) is coaxially and fixedly connected with two filter boxes (8) which are symmetrically arranged from top to bottom, each filter box (8) is filled with active carbon (9), each treatment cylinder (6) is internally coaxially and fixedly connected with a support net (10), a drying bag (11) is arranged on each support net (10), and a drying agent is filled in each drying bag (11).

2. A plant for compressing carbon dioxide for urea production according to claim 1, characterized in that each of said drying bags (11) is made of breathable absorbent cotton material.

3. The carbon dioxide compression device for urea production according to claim 1, wherein the upper and lower ends of each filter box (8) are provided with a plurality of uniformly distributed air holes (12).

4. Carbon dioxide compression unit for urea production according to claim 1, characterized in that the two outlet ends of the tee (1) are respectively equipped with a front solenoid valve (13) and the outlet end of each air feed pump (7) is respectively equipped with a rear solenoid valve (14).

5. A carbon dioxide compression unit for urea production according to claim 1, characterized in that the outlet end of each of the air feeding pipes (5) is coaxially and fixedly connected with an upper flange (15), the inlet end of each of the treatment cylinders (6) is coaxially and fixedly connected with an upper flange (16) corresponding to the upper flange (15), the outlet end of each of the treatment cylinders (6) is coaxially and fixedly connected with a lower flange (17), and the inlet end of each of the air feeding pumps (7) is coaxially and fixedly connected with a lower flange (18) corresponding to the lower flange (17).