CN216367892U - Catalyst feeding program control system - Google Patents
Catalyst feeding program control system Download PDFInfo
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- CN216367892U CN216367892U CN202122976040.8U CN202122976040U CN216367892U CN 216367892 U CN216367892 U CN 216367892U CN 202122976040 U CN202122976040 U CN 202122976040U CN 216367892 U CN216367892 U CN 216367892U
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- control valve
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- separator
- catalyst
- feeding
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Abstract
The utility model discloses a catalyst feeding program control system, which belongs to the technical field of program control and comprises a catalyst feeding pipeline (1), a separator (2), a storage bin (3) and a DCS program control unit (8), wherein the lower end of the separator (2) is connected with the storage bin (3) through a discharging pipeline (21), a third control valve (31) is arranged on the discharging pipeline (21), and a gas pressurizing pipeline (5) is connected to the separator (2); the gas purging pipeline (6) is connected to the third control valve (31), the purging electromagnetic valve (61) is arranged on the gas purging pipeline (6), the pressure transmitter (7) is installed on the top opening of the separator (2), and the DCS program control unit (8) is connected with the first control valve (11), the second control valve (42), the third control valve (31), the fourth control valve (51) and the purging electromagnetic valve (61) respectively. And automatic blockage removal of feeding is realized by newly increasing pressure interlocking and purging a gas circuit and redesigning an interlocking program.
Description
Technical Field
The utility model relates to the technical field of program control, in particular to a catalyst feeding program control system.
Background
A substance that can change the chemical reaction rate of a reactant (either by increasing or decreasing) in a chemical reaction without changing the chemical equilibrium and whose mass and chemical properties are not changed before or after the chemical reaction is called a catalyst (solid catalyst is also called a catalyst). According to statistics, about more than 90% of industrial processes use catalysts, such as chemical industry, petrochemical industry, biochemical industry, environmental protection and the like.
As shown in fig. 2, the conventional catalyst feeding system is composed of a program control valve, a vacuum pump, a separator, a storage bin, and the like. When feeding, the vacuum pump is started, the dried catalyst is sent to the separator through the accelerating chamber and the feeding switch valve, then the catalyst is sent to the storage bin through the feeding ball valve, and simultaneously the nitrogen valve is opened, and the catalyst is conveyed under pressure by nitrogen.
For a solid catalyst, the catalyst is particles, the dryness and the wetness are uneven, the catalyst is easily accumulated at the lower end of a separator and the front end of a feeding ball valve to cause the blockage of a feeding pipeline, a feeding program is blocked, only feeding is stopped, the feeding ball valve is manually disassembled to clear the blockage, the time and the labor are consumed, and the production loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem of manual blockage clearing of a pipeline during catalyst feeding in the prior art, and provides a catalyst feeding program control system.
The purpose of the utility model is realized by the following technical scheme:
the system mainly comprises a catalyst feeding pipeline, a separator, a storage bin and a DCS program control unit, wherein the separator is respectively connected with the catalyst feeding pipeline and the storage bin;
the catalyst feeding pipeline is provided with a first control valve, the lower end of the separator is connected with the storage bin through a discharging pipeline, the discharging pipeline is provided with a third control valve, the upper part of the separator is connected with a gas pressurizing pipeline, and the gas pressurizing pipeline is provided with a fourth control valve;
the gas purging pipeline is connected to the third control valve, a purging electromagnetic valve is arranged on the gas purging pipeline, a pressure transmitter is installed on a hole formed in the top of the separator, and the DCS program control unit is connected with the first control valve, the third control valve, the fourth control valve and the purging electromagnetic valve respectively.
As an option, a catalyst feed programming system, the pressure transmitter is of the type PIASH 230.
As an option, a catalyst feed program control system, the gas purge line is a nitrogen purge line, and the model of the gas purge line is Φ 20.
As an option, the gas pressurization line is a nitrogen pressurization line.
As an option, a catalyst feeding program control system, the lower end of the separator is connected with a plurality of bins.
As an option, the catalyst feeding program control system further comprises a vacuum pump, the separator is connected with the vacuum pump through a vacuum pipeline, a second control valve is arranged on the vacuum pipeline, and the DCS program control unit is connected with the second control valve.
As an option, the third control valve is a ball valve.
As an option, a catalyst feed programming system opens into the gas purge line before the third control valve.
As an option, a catalyst feeding program control system is provided, and the front end of the catalyst feeding pipeline is connected with an accelerating chamber.
It should be further noted that the technical features corresponding to the above options can be combined with each other or replaced to form a new technical solution without conflict.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the utility model is structurally improved, a gas purging pipeline is connected to a third control valve, a purging electromagnetic valve is arranged on the gas purging pipeline, a hole is formed in the top of the separator, a pressure transmitter is installed at the top of the separator, an interlocking program is arranged in a DCS program control unit to control the first control valve, the third control valve, the fourth control valve and the purging electromagnetic valve, when the pipeline below the separator is found to be blocked, the purging electromagnetic valve is opened in an interlocking mode to purge the blocked pipeline, the automatic control of the blockage removal of the catalyst feeding pipeline is realized, and the labor intensity of manual blockage removal is reduced.
(2) According to the utility model, when in initial feeding, the purging electromagnetic valve is firstly opened to purge at the inlet of the third control valve, so that possible blockage during feeding is reduced.
(3) After the transformation, the pressure interlocking and nitrogen purging device is normally put into use, the blockage is rapidly cleared, the cost caused by shutdown blockage clearing is reduced, the times of pipeline blockage are reduced, and the stable operation period of the feeding system is prolonged.
(4) Reduces the waste discharge caused by blockage removal and protects the environment.
Drawings
FIG. 1 is a schematic diagram of a catalyst feed program control system according to the present invention;
FIG. 2 is a schematic diagram of a catalyst feed program control system in the prior art.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships described based on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
According to the utility model, the gas purging pipeline 6 is connected to the third control valve 31, the purging electromagnetic valve 61 is arranged on the gas purging pipeline 6, the pressure transmitter 7 is installed on the top of the separator 2, the interlocking program is arranged in the DCS program control unit 8 to control the first control valve 11, the second control valve 42, the third control valve 31, the fourth control valve 51 and the purging electromagnetic valve 61, when the pipeline below the separator 2 is found to be blocked, the purging electromagnetic valve 61 is opened in an interlocking manner to purge the blocked pipeline, so that the automatic control of the blockage removal of the catalyst feeding pipeline is realized, and the labor intensity of manual blockage removal is reduced.
Example 1
In an exemplary embodiment, a catalyst feeding program control system is provided, as shown in fig. 1 and 2, the system comprises a catalyst feeding pipeline 1, a separator 2, a storage bin 3 and a DCS program control unit 8, wherein the separator 2 is respectively connected with the catalyst feeding pipeline 1, the storage bin 3 and a vacuum pump 4;
the catalyst feeding pipeline 1 is provided with a first control valve 11, the lower end of the separator 2 is connected with the storage bin 3 through a blanking pipeline 21, the blanking pipeline 21 is provided with a third control valve 31, the upper part of the separator 2 is connected with a gas pressurizing pipeline 5, and the gas pressurizing pipeline 5 is provided with a fourth control valve 51;
the gas purging pipeline 6 is connected to the third control valve 31, the purging electromagnetic valve 61 is arranged on the gas purging pipeline 6, the pressure transmitter 7 is installed on the top of the separator 2 in a hole, and the DCS program control unit 8 is connected with the first control valve 11, the third control valve 31, the fourth control valve 51 and the purging electromagnetic valve 61 respectively.
Specifically, an interlock program is provided in the DCS program control unit 8, which includes control information for the first control valve 11, the second control valve 42, the third control valve 31, the fourth control valve 51, and the purge solenoid valve 61.
The first control valve 11 is opened to start the catalyst transportation to the separator 2, and simultaneously the fourth control valve 51 on the gas pressurization pipeline 5 is opened to transport the inert gas to the separator 2 for pressurization, thereby facilitating the catalyst transportation. At this time, the third control valve 31 is in a closed state. After a certain time of feeding, the third control valve 31 is opened to allow the catalyst to be transferred from the separator 2 to the silo 3.
Further, in the feeding process, the pressure in the separator 2 is detected in real time through the pressure transmitter 7, when the internal pressure rises to a certain value, whether the separator 2 is blocked or not is judged according to the detection value of the pressure transmitter 7, the first control valve 11 is closed to stop feeding, the fourth control valve 51 is closed to stop pressurizing the separator 2, the third control valve 31 is opened, and meanwhile, the purging electromagnetic valve 61 is opened in an interlocking manner to purge the blanking pipeline 21.
Further, an interlocking program is set in the DCS program control unit 8, when the third control valve 31 is blocked, the pressure in the bin separator 2 rises due to pressurization of the gas pressurization pipeline 5, and when the pressure reaches a pressure interlocking value, the DCS program control unit 8 outputs an interlocking signal to close the fourth control valve 51, stop pressurizing the separator 2, and simultaneously interlock and open the purge solenoid valve 61 to purge the blocked pipeline.
Further, at the initial feeding, the purge solenoid valve 61 is opened to purge the inlet of the third control valve 31 for several seconds, and then the purge solenoid valve 61 is closed to reduce possible clogging at the initial feeding.
Further, when the separator 2 is clogged, the interlock program controls the purge solenoid valve 61 to be intermittently opened/closed until the purge down line 21 is purged.
Further, the pressure transmitter 7 is of a PIASH230 type, and the gas purge line 6 is of a phi 20 type.
Further, the gas pressurizing pipeline 5 is a nitrogen pressurizing pipeline or other inert gas pipelines.
Further, in a programmed catalyst feeding system, a plurality of bins 3, such as two bins 3 shown in fig. 1, are connected to the lower end of the separator 2.
According to the utility model, automatic blockage removal of a feeding system is realized innovatively by newly adding a pressure interlocking and purging gas circuit and redesigning an interlocking program, specifically, a gas purging pipeline 6 is connected to a third control valve 31, a purging electromagnetic valve 61 is arranged on the gas purging pipeline 6, a pressure transmitter 7 is arranged on a hole at the top of a separator 2, an interlocking program is arranged in a DCS program control unit 8 to control a first control valve 11, a second control valve 42, a third control valve 31, a fourth control valve 51 and the purging electromagnetic valve 61, when the pipeline below the separator 2 is found to be blocked, the purging electromagnetic valve 61 is opened in an interlocking manner to purge the blocked pipeline, so that the automatic control of blockage removal of the catalyst feeding pipeline is realized, and the labor intensity of manual blockage removal is reduced.
Example 2
Based on embodiment 1, a catalyst feeding program control system is provided, the system further comprises a vacuum pump 4, the separator 2 is connected with the vacuum pump 4 through a vacuum pipeline 41, a second control valve 42 is arranged on the vacuum pipeline 41, and the DCS program control unit 8 is connected with the second control valve 42.
Specifically, after being dried by a drying tower, the catalyst is sent to a separator 2 for temporary storage, then the catalyst is sent from the separator 2 to a storage bin 3 (generally, a plurality of storage bins 3 are arranged, one storage bin is firstly arranged when the catalyst is used, and another storage bin is arranged after the catalyst is filled), the catalyst coming out from the lower part of the storage bin 3 is bagged and then packed or sent to a customer, in short, the catalyst feeding function is a catalyst conveying process.
Further, during feeding, the vacuum pump 4 is started, the DCS program control unit is started, the second control valve 42 is controlled to be opened firstly, the separator 2 is vacuumized, and the catalyst discharged from the drying tower is pumped into the separator 2. The vacuum pump 4 is a device or equipment for obtaining a vacuum by mechanically, physically, chemically or physico-chemically pumping a pumped container, and is a device for improving, generating and maintaining a vacuum in a closed space by various methods.
When the separator 2 is blocked, the DCS program control unit 8 closes the second control valve 42 by means of an interlock program and stops the evacuation.
Further, the third control valve 31 is a ball valve.
Further, the gas purge line 6 is connected to a front opening of the third control valve 31, specifically, a pressure transmitter PIASH230 is installed to a top opening of the separator 2, a signal is introduced into the DCS program control unit 8 to perform an interlocking program configuration, a nitrogen pipeline with a diameter of 22 is respectively connected to the front opening of the third control valve 31, a pipeline port faces the third control valve 31, and an electromagnetic valve is installed on the nitrogen pipeline to open/close a purge gas source.
Further, the front end of the catalyst feeding pipeline 1 is connected with an accelerating chamber for accelerating the catalyst feeding.
Further, when clogging occurs at the third control valve 31 during the feeding, the pressure in the separator 2 rises due to the pressurization of nitrogen. When the pressure detection of the pressure transmitter PIASH230 reaches an interlocking value, the DCS program control unit 8 outputs an interlocking signal to stop the vacuum pump in an interlocking manner, the first control valve 11 is closed to stop feeding, the fourth control valve 51 is closed to stop pressurizing the separator 2, the third control valve 31 is opened, the purging electromagnetic valve 61 is opened in an interlocking manner, and the blanking pipeline 21 is purged until the third control valve 31 is blown through. When the blockage is eliminated, the pressure in the separator 2 is reduced to normal pressure, the DCS interlocking is released, and the feeding program control system is restarted.
And sequentially opening the second control valve 42, the first control valve 11, the fourth control valve 51 and the third control valve 31 through the interlocking program, starting the feeding process of the catalyst, specifically, delaying for 30 seconds (adjustable) to close after the fourth control valve 51 is opened, and delaying for 300 seconds (adjustable) to close after the third control valve 31 is opened, thereby completing one feeding cycle.
After the utility model is transformed, the pressure interlocking and nitrogen purging device is normally put into use, the blockage is rapidly cleared, the cost caused by shutdown and blockage clearing is reduced, the times of pipeline blockage are reduced, and the stable operation period of a feeding system is prolonged. Meanwhile, the waste discharge caused by blockage removal is reduced, and the environment is protected.
The above detailed description is for the purpose of describing the utility model in detail, and it should not be construed that the detailed description is limited to the description, and it will be apparent to those skilled in the art that various modifications and substitutions can be made without departing from the spirit of the utility model.
Claims (10)
1. A catalyst feeding program control system is characterized by comprising a catalyst feeding pipeline (1), a separator (2), a storage bin (3) and a DCS program control unit (8), wherein the separator (2) is respectively connected with the catalyst feeding pipeline (1) and the storage bin (3);
a first control valve (11) is arranged on the catalyst feeding pipeline (1), the lower end of the separator (2) is connected with the storage bin (3) through a blanking pipeline (21), a third control valve (31) is arranged on the blanking pipeline (21), a gas pressurizing pipeline (5) is connected to the upper part of the separator (2), and a fourth control valve (51) is arranged on the gas pressurizing pipeline (5);
insert gaseous pipeline (6) that sweeps on third control valve (31), be equipped with on gaseous pipeline (6) that sweeps solenoid valve (61), pressure transmitter (7) are installed in the top trompil of separator (2), DCS programme-controlled unit (8) respectively with first control valve (11), third control valve (31), fourth control valve (51) and sweep solenoid valve (61) and be connected.
2. The catalyst feed programming system of claim 1, wherein the pressure transmitter (7) is of the PIASH230 type.
3. The programmed catalyst feed system of claim 1, wherein the gas purge line (6) is a nitrogen purge line.
4. A programmed catalyst feed system according to claim 3, characterized in that the gas purge line (6) is of the type Φ 20.
5. The programmed catalyst feed system of claim 1, wherein the gas pressurization line (5) is a nitrogen pressurization line.
6. Programmed catalyst feeding system according to claim 1, characterized in that a plurality of silos (3) are connected to the lower end of the separator (2).
7. The programmed catalyst feeding system of claim 1, further comprising a vacuum pump (4), wherein the separator (2) is connected to the vacuum pump (4) through a vacuum pipe (41), a second control valve (42) is provided on the vacuum pipe (41), and the DCS program control unit (8) is connected to the second control valve (42).
8. The programmed catalyst feed system of claim 1, wherein the third control valve (31) is a ball valve.
9. The programmed catalyst feed system of claim 8, wherein the gas purge line (6) is vented before the third control valve (31).
10. The programmed catalyst feeding system as claimed in claim 1, wherein the catalyst feeding pipe (1) is connected with an acceleration chamber at its front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122976040.8U CN216367892U (en) | 2021-11-30 | 2021-11-30 | Catalyst feeding program control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122976040.8U CN216367892U (en) | 2021-11-30 | 2021-11-30 | Catalyst feeding program control system |
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| Publication Number | Publication Date |
|---|---|
| CN216367892U true CN216367892U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122976040.8U Active CN216367892U (en) | 2021-11-30 | 2021-11-30 | Catalyst feeding program control system |
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| CN (1) | CN216367892U (en) |
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2021
- 2021-11-30 CN CN202122976040.8U patent/CN216367892U/en active Active
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