CN216589187U - Centrifugal turbine compressor of chloroethylene - Google Patents
Centrifugal turbine compressor of chloroethylene Download PDFInfo
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- CN216589187U CN216589187U CN202123251715.9U CN202123251715U CN216589187U CN 216589187 U CN216589187 U CN 216589187U CN 202123251715 U CN202123251715 U CN 202123251715U CN 216589187 U CN216589187 U CN 216589187U
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Abstract
The utility model discloses a centrifugal turbine compressor of chloroethylene, including motor, high-speed shaft, the one-level compression cylinder, the second grade compression cylinder that communicates with the one-level compression cylinder, the one-level compression cylinder be equipped with one-level entry and one-level export, the second grade compression cylinder is equipped with second grade entry and second grade export, the one-level compression cylinder and the inside one-level entry of second grade compression cylinder, second grade entrance are equipped with one-level impeller and second grade impeller respectively, one-level impeller and second grade impeller are fixed with the both ends of high-speed shaft, chloroethylene gas is through the one-level pressurization of one-level impeller and the second grade pressurization of second grade impeller in proper order; the compressor is also provided with an air seal chamber for preventing vinyl chloride gas from leaking, the air seal chamber being located at a non-end portion of the high-speed shaft. The utility model has the advantages that the first-stage impeller and the second-stage impeller carry out secondary centrifugal pressurization on the vinyl chloride gas, thereby realizing the beneficial effects of high rotating speed, high air pressure and low energy consumption; meanwhile, the gas seal cavity is arranged, so that the chloroethylene gas is kept sealed during pressurization, and the problem of oil content of the chloroethylene gas is avoided.
Description
Technical Field
The utility model relates to a centrifugal turbo compressor specifically is a centrifugal turbo compressor of chloroethylene.
Background
PVC (polyvinyl chloride) is widely applied plastic, and the domestic production method is mainly a calcium carbide method. The method comprises the steps of adding water into calcium carbide (calcium carbide CaC 2) to generate acetylene gas (C2H2) and calcium hydroxide (lime mud), burning chlorine and hydrogen in a synthesis furnace to generate hydrogen chloride gas, carrying out addition reaction on the hydrogen chloride gas and the acetylene gas in a converter to generate vinyl chloride monomer gas, then carrying out pressurization rectification to prepare Vinyl Chloride Monomer (VCM), and carrying out polymerization reaction on the vinyl chloride monomer in a polymerization kettle to generate polyvinyl chloride (PVC).
In the PVC production process, most of the existing devices for pressurizing vinyl chloride are screw compressors, lubricating oil for ensuring the operation of the screws has the functions of lubrication, cooling, sealing and shock absorption, but the problem of oil-gas separation and purification is inevitably brought due to the intervention of the lubricating oil, and the product quality is possibly influenced due to the existence of a small amount of the lubricating oil.
In 2020, the capacity of PVC in China is 2660 ten thousand tons per year, the yield is about 2150 ten thousand tons per year, and the current vinyl chloride compressors used in the PVC industry are all screw type compressors, so that the problem of oil content of vinyl chloride monomer gas exists.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned problem that exists among the prior art, the utility model provides a have high rotational speed, high atmospheric pressure, low energy consumption and the effectual vinyl chloride centrifugal turbine compressor of atmoseal.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a centrifugal turbo compressor of chloroethylene, including motor, high-speed shaft, one-level compression cylinder, with the second grade compression cylinder of one-level compression cylinder intercommunication, the one-level compression cylinder be equipped with one-level entry and one-level export, the second grade compression cylinder is equipped with second grade entry and second grade export, the one-level compression cylinder with the inside of second grade compression cylinder be in the one-level entry, the second grade entrance is equipped with respectively the one-level impeller with the second grade impeller, the one-level impeller with the second grade impeller is fixed with the both ends of high-speed shaft, chloroethylene gas passes through the one-level pressurization of one-level impeller and the second grade pressurization of second grade impeller in proper order; the compressor is also provided with a gas seal chamber for preventing vinyl chloride gas from leaking, the gas seal chamber being located at a non-end portion of the high speed shaft.
In the centrifugal type turbine compressor for vinyl chloride, the first-stage compression cylinder and the second-stage compression cylinder are internally provided with a first-stage turbine channel and a second-stage turbine channel.
In the centrifugal turbine compressor for vinyl chloride, the first-stage impeller and the second-stage impeller are both closed impellers, each closed impeller has a centrifugal channel, and the centrifugal channel is located between the first-stage inlet and the first-stage turbine channel or between the second-stage inlet and the second-stage turbine channel.
In the centrifugal turbine compressor for vinyl chloride, the diameter of the first turbine passage is larger than that of the second turbine passage.
In the centrifugal turbine compressor for vinyl chloride, a gap is formed between one end of the first-stage impeller, which faces away from the first-stage inlet, and the inner wall of the first-stage compression cylinder, and between one end of the second-stage impeller, which faces away from the second-stage inlet, and the inner wall of the second-stage compression cylinder.
In the centrifugal turbo compressor for vinyl chloride, the first-stage compression cylinder and the second-stage compression cylinder are both provided with annular gas seal chambers inside, and the gas seal chambers are used for preventing vinyl chloride gas from leaking from the gap.
In the centrifugal chloroethylene turbine compressor, the gas seal cavity adopts a five-section gas seal structure, and inert gas is injected into the gas seal cavity to seal the gap.
In the centrifugal chloroethylene turbine compressor, the outer surface of the high-speed shaft, which is located in the air seal cavity, is provided with five sections of reference-difference type comb teeth, and concave-convex sealing teeth corresponding to the comb teeth are respectively arranged in the primary compression cylinder and the secondary compression cylinder.
In the centrifugal turbo compressor for vinyl chloride, the first-stage compression cylinder and the second-stage compression cylinder are driven by the motor to rotate and pressurize, the motor is provided with the transmission shaft and the transmission fluted disc, and the middle part of the high-speed shaft is provided with the high-speed teeth corresponding to the transmission fluted disc.
In the centrifugal turbine compressor for vinyl chloride, the rotating speed of the first-stage impeller and the second-stage impeller is 15000r/min-36000 r/min.
In the utility model, the chlorine ethylene gas is pressurized centrifugally for the second time by the first-stage impeller and the second-stage impeller, thereby realizing the beneficial effects of high rotating speed, high air pressure and low energy consumption; meanwhile, the gas seal cavity is arranged, so that the chloroethylene gas is kept sealed during pressurization, and the problem of oil content of the chloroethylene gas is avoided.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view showing the structure of a centrifugal turbo compressor for vinyl chloride according to example 1 of the present invention;
FIG. 2 is a schematic sectional view of the vinyl chloride centrifugal turbine compressor of FIG. 1;
fig. 3 is an enlarged view of a portion of the centrifugal type turbine compressor a of vinyl chloride of fig. 2.
Fig. 4 is an enlarged view of a portion of the vinyl chloride centrifugal turbo compressor B of fig. 3.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
As shown in the attached drawings 1, 2, 3 and 4, the utility model provides a centrifugal turbine compressor of chloroethylene, including motor 1, high-speed shaft 5, one-level compression cylinder 3, the second-level compression cylinder 4 that communicates with one-level compression cylinder 3, the one-level inlet 31 and the one-level export 32 of being equipped with of one-level compression cylinder 3, second-level compression cylinder 4 is equipped with second grade inlet 41 and second grade export 42, inside one-level inlet 31, second grade inlet 41 branch are equipped with one-level impeller 33 and second grade impeller 43 at one-level inlet 31 of one-level compression cylinder 3 and second-level compression cylinder 4 respectively, one-level impeller 33 and second grade impeller 43 are fixed with the both ends of high-speed shaft 5, chloroethylene gas is through the one-level pressurization of one-level impeller 33 and the second grade pressurization of second grade impeller 43 in proper order; the compressor is also provided with a gas seal chamber 2 for preventing vinyl chloride gas from leaking, the gas seal chamber 2 being located at a non-end portion of the high speed shaft 5.
The rotating speed of the first-stage impeller 33 and the second-stage impeller 43 is 15000r/min-36000 r/min. First-order impeller 33 and second-order impeller 43 are the closed impeller, and the apron around the closed impeller is equipped with around the blade, and is efficient, is applicable to the clean liquid or the gas of carrying the impurity-free, compares open impeller gas flow loss little. The first-stage compression cylinder 3 and the second-stage compression cylinder 4 are also provided with a first-stage turbine passage 34 and a second-stage turbine passage 44 inside. The diameter of the first stage turbine passage 34 is larger than the diameter of the second stage turbine passage 44, and the smaller diameter provides faster pressure rise. The shrouded impeller has a centrifugal passage 6, the centrifugal passage 6 being located between the primary inlet 31 and the primary turbine passage 34 or between the secondary inlet 41 and the secondary turbine passage 44.
The first-stage impeller 33 and the second-stage impeller 43 are not in contact with the inner wall of the first-stage compression cylinder 3 and the inner wall of the second-stage compression cylinder 4. Gaps 8 are formed between one end of the first-stage impeller 33, which is back to the first-stage inlet 31, and the inner wall of the first-stage compression cylinder 3, and between one end of the second-stage impeller 43, which is back to the second-stage inlet 41, and the inner wall of the second-stage compression cylinder 4. The inside of one-level compression cylinder 3 and secondary compressor all is equipped with annular atmoseal chamber 2, and atmoseal chamber 2 is used for preventing that chloroethylene gas from leaking from clearance 8, and atmoseal chamber 2 adopts five sections atmoseal structures, and this structure is labyrinth seal. The injection of inert gas into the gas seal cavity 2 achieves the sealing of the gas seal cavity 2 to the gap 8.
Five sections of staggered comb teeth 21 are arranged on the outer surface of the high-speed shaft 5 positioned in the air seal cavity 2, concave-convex sealing teeth 22 corresponding to the comb teeth 21 are respectively arranged in the primary compression cylinder 3 and the secondary compression cylinder 4, and the high-speed shaft 5 is sealed with the comb teeth 21 of the air seal cavity 2 and keeps non-contact with the inner walls of the primary compression cylinder 3 and the secondary compression cylinder 4.
The first-stage compression cylinder 3 and the second-stage compressor are driven by the motor 1 to rotate and pressurize, the motor 1 is provided with a transmission shaft 11 and a transmission gear disc 12, and the transmission gear disc 12 is sleeved with a gear box 13. The middle part of the high-speed shaft 5 is provided with high-speed teeth 51 corresponding to the driving toothed disc 12.
The compressor also includes coolers between the primary outlet 32 and the secondary inlet 41, and between the secondary outlet 42 and the downstream platform, respectively.
During the pressurization process, vinyl chloride gas under normal pressure enters from the primary inlet 31, is pressurized by the primary impeller 33 and then exits from the primary outlet 32, then the primarily pressurized gas is cooled by the cooler, enters from the secondary inlet 41 into the secondary impeller 43 for repressurization, finally is discharged from the secondary outlet 42 and is cooled by the cooler again so as to be distributed to a downstream workbench.
In the air seal process, part of the chloroethylene gas can be moved away from a gap between the impeller and the inner wall of the compression cylinder, so that inert gas needs to be injected into the air seal cavity 2 to prevent the chloroethylene gas from leaking from the air seal cavity 2.
The compressor provides final vinyl chloride gas pressure in a single-stage acceleration and multi-stage compression mode, and has the advantages of high sealing effect and energy conservation.
When the high-speed impeller works, the motor 1 drives the transmission fluted disc 12 to rotate through the transmission shaft 11, the transmission fluted disc 12 is meshed with the high-speed teeth 51, and the diameter of the transmission fluted disc 12 is far larger than that of the high-speed teeth 51, so that the primary impeller 33 and the secondary impeller 43 which are positioned at two ends of the high-speed shaft 5 rotate at a high speed of 15000r/min-36000r/min at the same time, and the rotating speed can be adjusted through the motor 1, so that the pressure and the flow are controlled;
the turbine compression method of the compressor is that a centrifugal impeller is driven by a high-speed shaft 5 to rotate at the rotating speed, so that vinyl chloride gas is sucked in from a primary inlet 31 and a secondary inlet 41 at a high speed, passes through a centrifugal channel 6 of the centrifugal impeller with the linear speed of 360-800 m/s, passes through a diffuser, a cooler and other equipment, and is finally discharged from a secondary outlet 42 at a high speed when the pressure reaches 0.8 Mpa.
In the using process, the motor 1 drives the centrifugal impeller to rotate at a high speed through the high-speed shaft 5, the rotating speed of the impeller reaches 23000 r/m, work is performed on the vinyl chloride gas, energy is transmitted to the gas, so that the pressure of the vinyl chloride gas is increased, the vinyl chloride gas is compressed from the existing low pressure to high pressure for supply, the pressure of a primary outlet 32 is 1-3Kpa at the moment, the vinyl chloride gas enters a secondary inlet 41 after being cooled, the vinyl chloride gas is discharged from a secondary outlet 42 pipe after the same impeller continues to perform work on the vinyl chloride gas, and the pressure of chlorine at the moment can reach not less than 0.8 Mpa; the sealing of the chloroethylene gas adopts a special structure of a five-section labyrinth type, so that the chloroethylene gas is prevented from leaking.
The molecular weight of the chloroethylene is 62.5, and is smaller than the molecular weight of 71 of chlorine, the exhaust pressure is high, and the compression difficulty is larger than that of the chlorine. The air inlet pressure is nearly normal pressure, and an air seal cavity is arranged at the back of the centrifugal impeller to ensure zero leakage of chloroethylene.
The utility model discloses utilize the suction of turbine centrifugal impeller entry to utilize the efficient advantage with five sections atmoseal structures of turbo machine, realize the gaseous compression of chloroethylene by 15000r/min-36000 r/min's high-speed centrifugal impeller, thereby greatly reduced the energy consumption of compression and solution chloroethylene oiliness problem, more can improve product quality.
In order to improve the efficiency of the impeller, a closed impeller is adopted, a wheel disc and a wheel cover adopt a welding structure, and the impeller and a high-speed gear shaft adopt conical surface interference fit and are connected by fastening screws. The front of the impeller rim is provided with an end seal ring made of non-metallic materials, so that the axial clearance of the centrifugal impeller is ensured to be in a reasonable size, and meanwhile, the abrasion of a compression cylinder or a front cover can be prevented.
In view of the process requirements of reducing the volume and weight of the machine and obtaining high efficiency and energy saving, the impeller speed is greatly increased to over 20000r/min and up to 36000r/min, and the high speed makes it obviously different from other types of compressors.
Considering the balance of the axial force of the impellers, the impellers are symmetrically arranged. Meanwhile, thrust plates are arranged on two sides of a pinion of a high-speed gear shaft and used for balancing axial force. The bearing of the high-speed shaft is a tilting pad dynamic pressure sliding radial thrust combined bearing; the input shaft bearing is a rolling ball bearing.
The utility model has the advantages that:
firstly, in order to meet the requirement of high pressure, the rotating speed of the chlorine compressor is increased to be more than 20000 r/min.
And secondly, the structure is an integral gear box type, and the transmission efficiency is high by adopting single-stage transmission of the small-modulus helical gear.
And thirdly, the existing screw compressors of the current vinyl chloride plants have the advantages of high energy consumption, large volume, large noise and high maintenance cost, and the compressors have small volume, compact structure, energy conservation and emission reduction.
Fourthly, the shaft seal adopts labyrinth seal with five sections of comb teeth, the purity of the chloroethylene is ensured, the oil-containing problem of the chloroethylene is effectively prevented, the product quality can be improved, and the oil-containing problem of the chloroethylene monomer gas is solved through the gas seal.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (10)
1. A chloroethylene centrifugal turbo compressor comprises a motor, a high-speed shaft, a primary compression cylinder and a secondary compression cylinder communicated with the primary compression cylinder, wherein the primary compression cylinder is provided with a primary inlet and a primary outlet, and the secondary compression cylinder is provided with a secondary inlet and a secondary outlet, and is characterized in that a primary impeller and a secondary impeller are respectively arranged at the primary inlet and the secondary inlet inside the primary compression cylinder and the secondary compression cylinder, the primary impeller and the secondary impeller are fixed at two ends of the high-speed shaft, and chloroethylene gas sequentially passes through primary pressurization of the primary impeller and secondary pressurization of the secondary impeller; the compressor is also provided with a gas seal chamber for preventing vinyl chloride gas from leaking, the gas seal chamber being located at a non-end portion of the high speed shaft.
2. The vinyl chloride centrifugal turbine compressor of claim 1, wherein: and a first-stage turbine channel and a second-stage turbine channel are also arranged in the first-stage compression cylinder and the second-stage compression cylinder.
3. The vinyl chloride centrifugal turbine compressor of claim 2, wherein: the first-stage impeller and the second-stage impeller are both closed impellers, each closed impeller is provided with a centrifugal channel, and each centrifugal channel is located between the first-stage inlet and the first-stage turbine channel or between the second-stage inlet and the second-stage turbine channel.
4. The vinyl chloride centrifugal turbine compressor of claim 2, wherein: the diameter of the first-stage turbine passage is larger than that of the second-stage turbine passage.
5. The vinyl chloride centrifugal turbine compressor of claim 1, wherein: gaps are reserved between one end, back to the primary inlet, of the primary impeller and the inner wall of the primary compression cylinder and between one end, back to the secondary inlet, of the secondary impeller and the inner wall of the secondary compression cylinder.
6. The vinyl chloride centrifugal turbine compressor of claim 5, wherein: annular air seal cavities are arranged in the first-stage compression cylinder and the second-stage compression cylinder and are used for preventing chloroethylene gas from leaking from the gap.
7. The vinyl chloride centrifugal turbine compressor of claim 6, wherein: the gas seal cavity adopts a five-section gas seal structure, and inert gas is injected into the gas seal cavity to seal the gap.
8. The vinyl chloride centrifugal turbine compressor of claim 7, wherein: five sections of reference difference type comb teeth are arranged on the outer surface of the high-speed shaft, which is positioned in the air seal cavity, and concave and convex sealing teeth corresponding to the comb teeth are respectively arranged in the first-stage compression cylinder and the second-stage compression cylinder.
9. The vinyl chloride centrifugal turbine compressor of claim 1, wherein: the first-stage compression cylinder and the second-stage compression cylinder are driven by the motor to rotate and pressurize, the motor is provided with a transmission shaft and a transmission fluted disc, and the middle part of the high-speed shaft is provided with high-speed teeth corresponding to the transmission fluted disc.
10. The vinyl chloride centrifugal turbine compressor of claim 1, wherein: the rotating speed of the first-stage impeller and the second-stage impeller is 15000r/min-36000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123251715.9U CN216589187U (en) | 2021-12-23 | 2021-12-23 | Centrifugal turbine compressor of chloroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123251715.9U CN216589187U (en) | 2021-12-23 | 2021-12-23 | Centrifugal turbine compressor of chloroethylene |
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| Publication Number | Publication Date |
|---|---|
| CN216589187U true CN216589187U (en) | 2022-05-24 |
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| CN202123251715.9U Active CN216589187U (en) | 2021-12-23 | 2021-12-23 | Centrifugal turbine compressor of chloroethylene |
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- 2021-12-23 CN CN202123251715.9U patent/CN216589187U/en active Active
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