CN109108001B - Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower - Google Patents
Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower Download PDFInfo
- Publication number
- CN109108001B CN109108001B CN201710496553.4A CN201710496553A CN109108001B CN 109108001 B CN109108001 B CN 109108001B CN 201710496553 A CN201710496553 A CN 201710496553A CN 109108001 B CN109108001 B CN 109108001B
- Authority
- CN
- China
- Prior art keywords
- purging
- pipeline
- pressure
- low
- impulse pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sampling And Sample Adjustment (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides an automatic purging device and a purging method for a differential pressure measurement pipeline of a desulfurizing tower demister, wherein the automatic purging device comprises a high-pressure sampling shutoff valve which is arranged on a high-pressure impulse pipe; the low-pressure sampling shutoff valve is arranged on the low-pressure impulse pipe; one end of the first purging pipeline is communicated with the compressed air pipeline, the other end of the first purging pipeline is communicated with the high-pressure impulse pipe, and a first purging switch valve is arranged on the first purging pipeline; one end of the second purging pipeline is communicated with the compressed air pipeline, the other end of the second purging pipeline is communicated with the low-pressure impulse pipe, and a second purging switch valve is arranged on the second purging pipeline; the balance pipeline is communicated with the high-pressure impulse pipe and the low-pressure impulse pipe, and a balance valve is arranged on the balance pipe; the problems of maintaining smoothness of a differential pressure measurement pipeline of the demister and ensuring measurement accuracy of a differential pressure transmitter of the demister are solved; meanwhile, as the computer is adopted to control the purging pipeline, the labor intensity of on-site operation and maintenance personnel is greatly reduced.
Description
Technical Field
The invention relates to the technical field of desulfurization, in particular to an automatic purging device and a purging method for a differential pressure measurement pipeline of a demister of a desulfurization tower.
Background
Over 80% of coal in China is converted into other forms of energy by direct combustion, and SO is produced by coal combustion 2 Is a major source of atmospheric pollution. Flue gas desulfurization is SO control 2 The main measure of pollution, while wet flue gas desulfurization technology is widely adopted as the most mature and most effective mainstream technology.
The demister is a very important core device in Flue Gas Desulfurization (FGD) technology and is used for separating liquid drops carried in flue gas after washing of an absorption tower. The most frequently occurring problem in the operation of the demister is that dust and gypsum mixture carried by flue gas are hardened between demister blades to block the demister. The blockage of the demister can cause the increase of the resistance of the whole FGD system, the increase of the current of a draught fan and the increase of the energy consumption of the system, and the safe and stable operation of the whole desulfurization system can be seriously influenced. Therefore, the differential pressure of the demister system is accurately monitored in time, the state of the demister is known to operators, the flushing mode is adjusted, and the demister blockage is reduced.
The differential pressure measurement mode of the demister is generally as follows: the inlet and outlet of the demister are respectively provided with a pressure guide pipe, and the flue gas at the high pressure side and the low pressure side enter the differential pressure transmitter through the pressure guide pipes for measurement. The disadvantage is that the pressure pipe is thin (specification isStainless steel tube), slurry droplets and dust carried in the flue gas can frequently cause blockage of the pressure guide tube, and the accuracy of differential pressure measurement of the demister is seriously affected; when the blockage phenomenon occurs, on-site maintenance personnel are required to manually clear the pipeline, so that the workload of on-site operation and maintenance personnel is greatly increased.
Disclosure of Invention
In order to solve the technical problems, the invention provides an automatic purging device and a purging method for a demister differential pressure measurement pipeline of a desulfurizing tower, and aims to provide a device for realizing the periodic and timely purging of the on-site demister differential pressure measurement pipeline remotely, and by the device, the problems of maintaining the smoothness of the demister differential pressure measurement pipeline and ensuring the measurement accuracy of a demister differential pressure transmitter are solved; meanwhile, as the computer is adopted to control the purging pipeline, the labor intensity of on-site operation and maintenance personnel is greatly reduced.
The invention provides an automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurization tower, which is used for purging a differential pressure sampling pipeline connected with a differential pressure transmitter, wherein the differential pressure sampling pipeline comprises a high-pressure guide pipe and a low-pressure guide pipe which are fixed on the wall of an absorption tower, the high-pressure guide pipe is communicated with the absorption tower at the inlet of the demister, and the low-pressure guide pipe is communicated with the absorption tower at the outlet of the demister, and the automatic purging device comprises the following components:
the high-pressure sampling shutoff valve is arranged on the high-pressure impulse pipe;
the low-pressure sampling shutoff valve is arranged on the low-pressure impulse pipe;
one end of the first purging pipeline is communicated with the compressed air pipeline, the other end of the first purging pipeline is communicated with the high-pressure impulse pipe, and a first purging switch valve is arranged on the first purging pipeline;
and one end of the second purging pipeline is communicated with the compressed air pipeline, the other end of the second purging pipeline is communicated with the low-pressure impulse pipe, and a second purging switch valve is arranged on the first purging pipeline.
As a further improvement of the invention, the invention further comprises a balance pipeline which is used for communicating the high-pressure impulse pipe and the low-pressure impulse pipe, and a balance valve is arranged on the balance pipeline.
As a further improvement of the present invention,
the first purging pipeline is communicated with the high-pressure impulse pipe through a first purging joint, and the second purging pipeline is communicated with the low-pressure impulse pipe through a second purging joint;
the balance pipeline is communicated with the high-pressure impulse pipe through a first balance joint, and the first balance joint is positioned between the first purging joint and the high-pressure sampling shutoff valve;
the balance pipeline is communicated with the low-pressure impulse pipe through a second balance joint, and the second balance joint is positioned between the second purging joint and the low-pressure sampling shutoff valve.
As a further improvement of the invention, the high-pressure sampling shutoff valve, the low-pressure sampling shutoff valve, the balance valve, the first purging switch valve and the second purging switch valve are all electromagnetic valves and are all connected with a DCS system, and the DCS system controls the opening and closing of the high-pressure sampling shutoff valve, the low-pressure sampling shutoff valve, the balance valve, the first purging switch valve and the second purging switch valve.
As a further improvement of the present invention, further comprising:
the automatic purging device box is internally provided with the first purging pipeline, the second purging pipeline, the balance pipeline, the high-pressure sampling shutoff valve, the low-pressure sampling shutoff valve, the balance valve, the first purging switch valve and the second purging switch valve, and the high-pressure guide pipe, the low-pressure guide pipe and the compressed air pipeline penetrate through the automatic purging device box;
the line is located in the automatic purging device box, the input end of the line is connected with the high-pressure sampling shutoff valve, the low-pressure sampling shutoff valve, the balance valve, the first purging switch valve and the second purging switch valve, and the output end of the line is connected with the DCS system.
The invention also provides an automatic purging method for the differential pressure measurement pipeline of the demister of the desulfurizing tower, which comprises the following steps:
step 1, purging a high-pressure impulse pipe, and turning to step 4;
step 2, purging the low-pressure impulse pipe, and turning to step 4;
step 3, purging the low-pressure impulse pipe and the high-pressure impulse pipe, and turning to step 4;
and 4, recovering differential pressure measurement.
As a further improvement of the present invention, step 1 specifically includes:
step 11, the DCS system controls to close the high-pressure sampling shutoff valve and the low-pressure sampling shutoff valve, and the time delay is 15 seconds;
step 12, the DCS system controls to open the first purging switch valve, and compressed air sequentially passes through the compressed air pipeline, the first purging pipeline and the high-pressure impulse pipe and then enters an absorption tower to purge the high-pressure impulse pipe;
step 13, purging for 1-2 minutes;
step 14, the DCS system controls to close the first purging switch valve;
step 15, turning to step 4.
As a further improvement of the present invention, step 2 specifically includes:
step 21, the DCS system controls to close the high-pressure sampling shutoff valve and the low-pressure sampling shutoff valve, and the time delay is 15 seconds;
step 22, the DCS system controls to open the second purging switch valve, and compressed air sequentially passes through the compressed air pipeline, the second purging pipeline and the low-pressure impulse pipe and then enters an absorption tower to purge the low-pressure impulse pipe;
step 23, purging for 1-2 minutes;
step 24, the DCS system controls to close the second purging switch valve;
step 25, turning to step 4.
As a further improvement of the present invention, step 3 specifically includes:
step 31, the DCS system controls to close the high-pressure sampling shutoff valve and the low-pressure sampling shutoff valve, and the time delay is 15 seconds;
step 32, the DCS system controls and opens the first purge switch valve and the second purge switch valve, compressed air enters the first purge pipeline and the second purge pipeline after passing through the compressed air pipeline, compressed air entering the first purge pipeline enters the absorption tower after passing through the high-pressure impulse pipe, and compressed air entering the second purge pipeline enters the absorption tower after passing through the low-pressure impulse pipe;
step 33, purging for 1-2 minutes;
step 34, the DCS system controls to close the first purging switch valve and the second purging switch valve;
step 35, turning to step 4.
As a further improvement of the present invention, step 4 specifically includes:
step 41, the DCS system controls to open the balance valve, and the time delay is 15 seconds;
step 42, the DCS system controls and opens the high-pressure sampling shutoff valve and the low-pressure sampling shutoff valve;
and 43, the DCS system controls to close the balance valve.
The invention has the following beneficial effects: the operator can purge the on-site differential pressure measurement pipeline regularly and timely in a DCS operator station in the desulfurization control room, so that smoothness of the differential pressure measurement pipeline of the demister is maintained, and measurement accuracy of a differential pressure transmitter of the demister is ensured; meanwhile, as the computer is adopted to control the purging pipeline, the labor intensity of on-site operation and maintenance personnel is greatly reduced.
Drawings
Fig. 1 is a schematic structural view of an automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurizing tower according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurizing tower according to a second embodiment and a third embodiment of the present invention.
In the figure, 1, a first purge switch valve 2 and a high-pressure sampling shutoff valve; 3. a low pressure sampling shutoff valve; 4. a balancing valve; 5. a second purge switch valve; 6. a differential pressure transmitter; 7. a low pressure impulse pipe; 8. a high pressure impulse pipe; 9. a compressed air line; 10. a first purge line; 11. a second purge line; 12. an absorber wall; 13. a demister; 14. and automatically purging the device box.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and examples.
Embodiment 1, as shown in fig. 1, an automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurizing tower is used for purging a differential pressure sampling pipeline connected with a differential pressure transmitter 6, the differential pressure sampling pipeline comprises a high-pressure impulse pipe 8 and a low-pressure impulse pipe 7 which are fixed on an absorption tower wall 12, the high-pressure impulse pipe 8 is communicated with an absorption tower at an inlet of the demister 13, and the low-pressure impulse pipe 7 is communicated with the absorption tower at an outlet of the demister 13, and the automatic purging device comprises:
a high-pressure sampling shutoff valve 2 provided on the high-pressure impulse pipe 8;
a low-pressure sampling shutoff valve 3 provided on the low-pressure impulse pipe 7;
the first purging pipeline 10 is provided with a first purging switch valve 1, one end of the first purging pipeline 10 is communicated with the compressed air pipeline 9, the other end of the first purging pipeline is communicated with the high-pressure impulse pipe 8, and the first purging pipeline 10 is communicated with the high-pressure impulse pipe 8 through a first purging joint;
and one end of the second purging pipeline 11 is communicated with the compressed air pipeline 9, the other end of the second purging pipeline is communicated with the low-pressure impulse pipe 7, the first purging pipeline 10 is provided with a second purging switch valve 5, and the second purging pipeline 11 is communicated with the low-pressure impulse pipe 7 through a second purging joint.
The high-pressure sampling shutoff valve 2, the low-pressure sampling shutoff valve 3, the first purging switch valve 1 and the second purging switch valve 5 are all electromagnetic valves, control lines of the high-pressure sampling shutoff valve 2, the low-pressure sampling shutoff valve 3, the first purging switch valve 1 and the second purging switch valve 5 are all connected with a DCS system, and the DCS system controls the opening and closing of the high-pressure sampling shutoff valve 2, the low-pressure sampling shutoff valve 3, the first purging switch valve 1 and the second purging switch valve 5;
the DCS system is a distributed control system and is used for monitoring and alarming the operation conditions of a flue gas system, an SO2 absorption system, an oxidation air system, a gypsum dehydration system (comprising a gypsum cyclone station and a wastewater cyclone anvil) and a desulfurization wastewater treatment system of the desulfurization system; sequential control of the motor, the electric door, the damper flap and the circuit breaker of the electric power supply circuit; as well as closed loop control and interlock protection of some process parameters.
Embodiment 2 as shown in fig. 2, the difference from the first embodiment is that the automatic purging device for a demister differential pressure measurement line of a desulfurizing tower further includes:
the balance pipeline is communicated with the high-pressure impulse pipe 8 and the low-pressure impulse pipe 7, a balance valve 4 is arranged on the balance pipeline, the balance pipeline is communicated with the high-pressure impulse pipe 8 through a first balance joint, and the first balance joint is positioned between the first purging joint and the high-pressure sampling shutoff valve 2; the balance pipeline is communicated with the low-pressure impulse pipe 7 through a second balance joint, the second balance joint is positioned between the second purging joint and the low-pressure sampling shutoff valve 3, after the impulse pipe purging is finished, the pressure in the high-pressure impulse pipe and the low-pressure impulse pipe can exceed the upper pressure limit of the differential pressure transmitter, the differential pressure transmitter is damaged, after the balance pipeline is added, the high-pressure impulse pipe and the low-pressure impulse pipe are communicated through the balance pipeline before the differential pressure transmitter is communicated with the absorption tower, and the differential pressure of the balance high-pressure impulse pipe and the balance low-pressure impulse pipe is close to 0, so that the differential pressure transmitter is protected;
the balance valve 4 is an electromagnetic valve, and a control line thereof is connected with a DCS system, and the DCS system controls the opening and closing of the balance valve 4.
Embodiment 3, as shown in fig. 2, is different from the second embodiment in that the automatic purging device for a demister differential pressure measurement line of a desulfurizing tower further includes:
an automatic purging device box 14, in which a first purging pipeline 10, a second purging pipeline 11, a balance pipeline, a high-pressure sampling shutoff valve 2, a low-pressure sampling shutoff valve 3, a balance valve 4, a first purging switch valve 1 and a second purging switch valve 5 are integrated, and a high-pressure impulse pipe 8, a low-pressure impulse pipe 7 and a compressed air pipeline 9 penetrate through the automatic purging device box 14; the automatic purging device box 14 plays a role in protecting the automatic purging device, and is convenient for field installation and wiring;
automatic purging device box and outsideThe high-pressure impulse pipe and the low-pressure impulse pipe are connected with the outside by adopting a welding mode>The compressed air pipe for the instrument is connected in a welding mode, so that the on-site installation and construction are simpler and more convenient.
The line row, it is located automatic purge device case 14, and the input of line row is connected with the control line of high pressure sampling shut-off valve 2, the control line of low pressure sampling shut-off valve 3, the control line of balanced valve 4, the control line of first purge switch valve 1 and the control line of second purge switch valve 5, and the output is connected with the DCS system, through the concentrated wiring mode of line row for the wiring is more convenient when whole external connection DCS system.
Embodiment 4, the purging method of the automatic purging device for the differential pressure measurement pipeline of the demister of the desulfurizing tower in the second embodiment and the third embodiment, wherein the automatic purging device is controlled by the DCS system to automatically purge the differential pressure measurement pipeline periodically, and the purging period is selected according to the actual condition of blockage of the differential pressure measurement pipeline, comprises the following steps:
step 1, purging the high-pressure impulse pipe 8, and turning to step 4, wherein the method specifically comprises the following steps:
step 11, the DCS system controls to close the high-pressure sampling shutoff valve 2 and the low-pressure sampling shutoff valve 3, and the time delay is 15 seconds;
step 12, the DCS system controls to open the first purging switch valve 1, compressed air sequentially passes through the compressed air pipeline 9, the first purging pipeline 10 and the high-pressure impulse pipe 8 and then enters the absorption tower to purge the high-pressure impulse pipe 8;
step 13, purging for 1-2 minutes;
step 14, the DCS system controls to close the first purge switch valve 1;
step 15, turning to step 4.
Step 2, purging the low-pressure impulse pipe 7, and turning to step 4, wherein the method specifically comprises the following steps:
step 21, the DCS system controls to close the high-pressure sampling shutoff valve 2 and the low-pressure sampling shutoff valve 3, and the time delay is 15 seconds;
step 22, the DCS system controls to open the second purging switch valve 5, and compressed air sequentially passes through the compressed air pipeline 9, the second purging pipeline 11 and the low-pressure impulse pipe 7 and then enters the absorption tower to purge the low-pressure impulse pipe 7;
step 23, purging for 1-2 minutes;
step 24, the DCS system controls to close the second purging switch valve 5;
step 25, turning to step 4.
Step 3, purging the low-pressure impulse pipe 7 and the high-pressure impulse pipe 8, and turning to step 4, wherein the method specifically comprises the following steps:
step 31, the DCS system controls to close the high-pressure sampling shutoff valve 2 and the low-pressure sampling shutoff valve 3, and the time delay is 15 seconds;
step 32, the DCS system controls to open the first purge switch valve 1 and the second purge switch valve 5, compressed air respectively enters the first purge pipeline 10 and the second purge pipeline 11 after passing through the compressed air pipeline 9, and compressed air entering the first purge pipeline 10 enters the absorption tower after passing through the high-pressure impulse pipe 8, and compressed air entering the second purge pipeline 11 enters the absorption tower after passing through the low-pressure impulse pipe 7;
step 33, purging for 1-2 minutes;
step 34, the DCS system controls to close the first purge switch valve 1 and the second purge switch valve 5;
step 35, turning to step 4.
Step 4, recovering differential pressure measurement, specifically comprising:
step 41, the DCS system controls to open the balance valve 4, and delays for 15 seconds;
step 42, the DCS system controls to open the high-pressure sampling shutoff valve 2 and the low-pressure sampling shutoff valve 3;
in step 43, the dcs system controls the closing of the balance valve 4.
The invention has the following beneficial effects: the operator can purge the on-site differential pressure measurement pipeline regularly and timely in a DCS operator station in the desulfurization control room, so that smoothness of the differential pressure measurement pipeline of the demister is maintained, and measurement accuracy of a differential pressure transmitter of the demister is ensured; the remote purging function of the impulse pipe is realized, the occurrence probability of blocking of the impulse pipe is timely and effectively reduced, the differential pressure measurement accuracy of the demister is improved, and the workload of manual field maintenance is reduced.
Various modifications may be made to the above disclosure by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore not limited to the above description, but is instead determined by the scope of the claims.
Claims (6)
1. An automatic purging device of desulfurizing tower defroster differential pressure measurement pipeline for purge the differential pressure sampling pipeline of connecting differential pressure transmitter (6), differential pressure sampling pipeline is including being fixed in high pressure impulse pipe (8) and low pressure impulse pipe (7) on absorber tower wall (12), high pressure impulse pipe (8) communicate with the absorber tower of defroster (13) entrance, low pressure impulse pipe (7) with the absorber tower intercommunication of defroster (13) exit, its characterized in that includes:
a high-pressure sampling shutoff valve (2) which is arranged on the high-pressure impulse pipe (8);
a low-pressure sampling shutoff valve (3) which is arranged on the low-pressure impulse pipe (7);
one end of the first purging pipeline (10) is communicated with the compressed air pipeline (9), the other end of the first purging pipeline is communicated with the high-pressure impulse pipe (8), and a first purging switch valve (1) is arranged on the first purging pipeline (10);
one end of the second purging pipeline (11) is communicated with the compressed air pipeline (9), the other end of the second purging pipeline is communicated with the low-pressure impulse pipe (7), and a second purging switch valve (5) is arranged on the second purging pipeline (11);
the balance pipeline is communicated with the high-pressure impulse pipe (8) and the low-pressure impulse pipe (7), and a balance valve (4) is arranged on the balance pipeline;
the first purging pipeline (10) is communicated with the high-pressure impulse pipe (8) through a first purging joint, and the second purging pipeline (11) is communicated with the low-pressure impulse pipe (7) through a second purging joint;
the balance pipeline is communicated with the high-pressure impulse pipe (8) through a first balance joint, and the first balance joint is positioned between the first purging joint and the high-pressure sampling shutoff valve (2);
the balance pipeline is communicated with the low-pressure impulse pipe (7) through a second balance joint, and the second balance joint is positioned between the second purging joint and the low-pressure sampling shutoff valve (3);
the purging method of the device comprises the following steps:
step 1, purging a high-pressure impulse pipe (8), and turning to step 4;
step 2, purging a low-pressure impulse pipe (7), and turning to step 4;
step 3, purging the low-pressure impulse pipe (7) and the high-pressure impulse pipe (8), and turning to step 4;
step 4, recovering differential pressure measurement, specifically comprising:
step 41, the DCS system controls to open the balance valve (4) and delay for 15 seconds;
step 42, the DCS system controls to open the high-pressure sampling shutoff valve (2) and the low-pressure sampling shutoff valve (3);
and step 43, the DCS system controls to close the balance valve (4).
2. The automatic purging device for a differential pressure measurement pipeline of a desulfurizing tower demister according to claim 1, wherein the high-pressure sampling shutoff valve (2), the low-pressure sampling shutoff valve (3), the balance valve (4), the first purging switch valve (1) and the second purging switch valve (5) are all electromagnetic valves and are all connected with a DCS system, and the DCS system controls the opening and closing of the high-pressure sampling shutoff valve (2), the low-pressure sampling shutoff valve (3), the balance valve (4), the first purging switch valve (1) and the second purging switch valve (5).
3. The automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurization tower according to any one of claims 1 to 2, further comprising:
an automatic purging device box (14) provided with the first purging pipeline (10), the second purging pipeline (11), the balance pipeline, the high-pressure sampling shutoff valve (2), the low-pressure sampling shutoff valve (3), the balance valve (4), the first purging switch valve (1) and the second purging switch valve (5), wherein the high-pressure impulse pipe (8), the low-pressure impulse pipe (7) and the compressed air pipeline (9) penetrate through the automatic purging device box (14);
the line is located in the automatic purging device box (14), the input end of the line is connected with the high-pressure sampling shutoff valve (2), the low-pressure sampling shutoff valve (3), the balance valve (4), the first purging switch valve (1) and the second purging switch valve (5), and the output end of the line is connected with the DCS system.
4. The automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurization tower according to claim 1, wherein the step 1 specifically comprises:
step 11, the DCS system controls to close the high-pressure sampling shutoff valve (2) and the low-pressure sampling shutoff valve (3), and delay for 15 seconds;
step 12, the DCS system controls to open the first purging switch valve (1), and compressed air sequentially passes through the compressed air pipeline (9), the first purging pipeline (10) and the high-pressure impulse pipe (8) and then enters an absorption tower to purge the high-pressure impulse pipe (8);
step 13, purging for 1-2 minutes;
step 14, the DCS system controls to close the first purging switch valve (1);
step 15, turning to step 4.
5. The automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurization tower according to claim 1, wherein the step 2 specifically comprises:
step 21, the DCS system controls to close the high-pressure sampling shutoff valve (2) and the low-pressure sampling shutoff valve (3), and delay for 15 seconds;
step 22, the DCS system controls to open the second purging switch valve (5), and compressed air sequentially passes through the compressed air pipeline (9), the second purging pipeline (11) and the low-pressure impulse pipe (7) and then enters an absorption tower to purge the low-pressure impulse pipe (7);
step 23, purging for 1-2 minutes;
step 24, the DCS system controls to close the second purging switch valve (5);
step 25, turning to step 4.
6. The automatic purging device for a differential pressure measurement pipeline of a demister of a desulfurization tower according to claim 1, wherein the step 3 specifically comprises:
step 31, the DCS system controls to close the high-pressure sampling shutoff valve (2) and the low-pressure sampling shutoff valve (3), and delay for 15 seconds;
step 32, the DCS system controls to open the first purge switch valve (1) and the second purge switch valve (5), compressed air respectively enters the first purge pipeline (10) and the second purge pipeline (11) after passing through the compressed air pipeline (9), and compressed air entering the first purge pipeline (10) enters an absorption tower after passing through the high-pressure impulse pipe (8), and compressed air entering the second purge pipeline (11) enters the absorption tower after passing through the low-pressure impulse pipe (7);
step 33, purging for 1-2 minutes;
step 34, the DCS system controls to close the first purge switch valve (1) and the second purge switch valve (5);
step 35, turning to step 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710496553.4A CN109108001B (en) | 2017-06-26 | 2017-06-26 | Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710496553.4A CN109108001B (en) | 2017-06-26 | 2017-06-26 | Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109108001A CN109108001A (en) | 2019-01-01 |
| CN109108001B true CN109108001B (en) | 2023-10-13 |
Family
ID=64822595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710496553.4A Active CN109108001B (en) | 2017-06-26 | 2017-06-26 | Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109108001B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076861B (en) * | 2020-01-07 | 2021-10-08 | 江苏凯弘节能环保科技有限公司 | Anti-blocking five-group valve and control method thereof |
| CN111774381B (en) * | 2020-03-18 | 2023-12-05 | 华电电力科学研究院有限公司 | Automatic purging device for sampling tube of hearth pressure switch of coal-fired power plant and control method of automatic purging device |
| CN113981873A (en) * | 2020-07-27 | 2022-01-28 | 河南森源重工有限公司 | Washing and sweeping vehicle and drainage pipe cleaning method thereof |
| CN112337905A (en) * | 2020-10-27 | 2021-02-09 | 江苏方天电力技术有限公司 | Device for improving denitration dilution air volume measurement accuracy |
| CN112974421A (en) * | 2021-02-07 | 2021-06-18 | 华能（天津）煤气化发电有限公司 | Method for treating sampling tube ash blockage |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3604385A1 (en) * | 1986-02-12 | 1987-08-13 | Buschjost Gmbh & Co Fr | Apparatus for cleaning measuring lines |
| CN200986486Y (en) * | 2006-11-22 | 2007-12-05 | 龚林 | Wind pressure measuring pipe quick blowing apparatus |
| CN103278199A (en) * | 2013-05-13 | 2013-09-04 | 山西宏慧盛世科技有限公司 | Vehicle fuel charge detecting device |
| CN103807466A (en) * | 2012-11-13 | 2014-05-21 | 北京华德创业环保设备有限公司 | Three-valve manifold with protection function |
| CN204594618U (en) * | 2014-12-25 | 2015-08-26 | 大唐科技产业集团有限公司 | A kind of mist separator of desulfurization differential pressure sampling pipe automatic back blow device |
| CN104897229A (en) * | 2015-06-26 | 2015-09-09 | 山东钢铁股份有限公司 | Portable online purging device for differential pressure flowmeter |
| CN205861148U (en) * | 2016-06-03 | 2017-01-04 | 大唐环境产业集团股份有限公司 | Desulfurization CEMS flow purging system |
| CN206009358U (en) * | 2016-08-04 | 2017-03-15 | 大唐环境产业集团股份有限公司 | A kind of desulfurizer mist eliminator differential pressure sampling line automatic flushing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140004610A1 (en) * | 2012-06-28 | 2014-01-02 | Uop Llc | Processes and apparatuses for converting a feedstock |
-
2017
- 2017-06-26 CN CN201710496553.4A patent/CN109108001B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3604385A1 (en) * | 1986-02-12 | 1987-08-13 | Buschjost Gmbh & Co Fr | Apparatus for cleaning measuring lines |
| CN200986486Y (en) * | 2006-11-22 | 2007-12-05 | 龚林 | Wind pressure measuring pipe quick blowing apparatus |
| CN103807466A (en) * | 2012-11-13 | 2014-05-21 | 北京华德创业环保设备有限公司 | Three-valve manifold with protection function |
| CN103278199A (en) * | 2013-05-13 | 2013-09-04 | 山西宏慧盛世科技有限公司 | Vehicle fuel charge detecting device |
| CN204594618U (en) * | 2014-12-25 | 2015-08-26 | 大唐科技产业集团有限公司 | A kind of mist separator of desulfurization differential pressure sampling pipe automatic back blow device |
| CN104897229A (en) * | 2015-06-26 | 2015-09-09 | 山东钢铁股份有限公司 | Portable online purging device for differential pressure flowmeter |
| CN205861148U (en) * | 2016-06-03 | 2017-01-04 | 大唐环境产业集团股份有限公司 | Desulfurization CEMS flow purging system |
| CN206009358U (en) * | 2016-08-04 | 2017-03-15 | 大唐环境产业集团股份有限公司 | A kind of desulfurizer mist eliminator differential pressure sampling line automatic flushing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109108001A (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109108001B (en) | Automatic purging device and purging method for differential pressure measurement pipeline of demister of desulfurizing tower | |
| CN203824985U (en) | Gas pollutant measurement calibration system for draw-out flue gas emission monitoring | |
| CN206696256U (en) | A kind of boiler exhaust gas on-line continuous monitoring adjusting means | |
| CN107966334A (en) | A kind of fire coal boiler fume sampling system and sampling method | |
| CN205981740U (en) | Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box | |
| CN207891371U (en) | A kind of efficient blockage clearing device for converter mouth elementary errors pressure pipeline | |
| CN214441530U (en) | One set of system that sweeps to denitration export net sampling device | |
| CN206882334U (en) | A kind of desulfurizer mist eliminator differential pressure measurement pipeline automatic blowout device | |
| CN212748859U (en) | Multipoint self-drainage smoke detection system | |
| CN206009358U (en) | A kind of desulfurizer mist eliminator differential pressure sampling line automatic flushing device | |
| CN203117017U (en) | Pretreatment device of analyzer for measuring cyclohexane oxidation oxygen in tail gas | |
| CN111897027A (en) | Anti-blocking detection cleaning device and method for CEMS probe | |
| CN109224854B (en) | Flue gas denitration grid method rotation sampling ammonia and nitrogen oxide combined monitoring device | |
| CN207263366U (en) | A kind of automatic blowout device of flue gas pressures detection | |
| CN204944559U (en) | A kind of thermal power plant's secondary air flow measuring system with automatic blowout device | |
| CN101799377B (en) | Sampling test point scavenging pipeline for on-site gas analyzer | |
| CN203500858U (en) | Device for detecting coal gas pressure and flow and preventing blockage | |
| CN204594618U (en) | A kind of mist separator of desulfurization differential pressure sampling pipe automatic back blow device | |
| CN109856187B (en) | Online real-time detection method for hydrocarbon dew point of gas pipeline | |
| CN209311153U (en) | Low-level (stack-gas) economizer differential pressure measuring point sampling line anti-block apparatus | |
| CN205538367U (en) | Automatic purge system | |
| CN213236984U (en) | Power source safety fast switching device of gas pipeline regulating valve | |
| CN201412861Y (en) | Smoke pre-cooling device through spraying | |
| CN209841751U (en) | Online real-time detection device for water dew point of gas pipeline | |
| CN205909969U (en) | Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |