CN117537355A - Steam soot blowing system capable of preventing pipeline impact and starting method - Google Patents
Steam soot blowing system capable of preventing pipeline impact and starting method Download PDFInfo
- Publication number
- CN117537355A CN117537355A CN202311697831.4A CN202311697831A CN117537355A CN 117537355 A CN117537355 A CN 117537355A CN 202311697831 A CN202311697831 A CN 202311697831A CN 117537355 A CN117537355 A CN 117537355A
- Authority
- CN
- China
- Prior art keywords
- steam
- soot blowing
- regulating valve
- pressure reducing
- opening
- 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.)
- Pending
Links
- 239000004071 soot Substances 0.000 title claims abstract description 92
- 238000007664 blowing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 51
- 238000010926 purge Methods 0.000 claims abstract description 4
- 230000006837 decompression Effects 0.000 claims description 6
- 230000009191 jumping Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
Abstract
A method for starting a steam soot blowing system capable of preventing pipeline impact comprises the following steps: opening an electric stop valve for steam inlet, and simultaneously starting a pressure reducing and regulating valve to work, wherein the opening of the pressure reducing and regulating valve is opened in sections; after the opening of the pressure reducing regulating valve reaches 5%, maintaining for more than 5 minutes; after the opening of the pressure reducing regulating valve reaches 10%, maintaining for more than 5 minutes; and starting the air preheater soot blower and the hearth soot blower to purge. The opening of the pressure reducing regulating valve is opened in a sectional and slow way, a plurality of fixed openings from small to large can be respectively set according to the conditions of normal drainage and soot blowing opening of the pressure reducing regulating valve, each opening is kept for a set time, and after steam is stabilized, the cooled soot blowing steam pipeline can be prevented from being impacted by a large amount of high-temperature high-pressure steam through PID automatic regulation of the pressure reducing regulating valve, the service life of the pipeline is prolonged, and the safety valve is prevented from jumping to influence normal operation.
Description
Technical Field
The invention relates to the field of physics, in particular to a steam soot blowing technology, and especially relates to a steam soot blowing system capable of preventing pipeline impact and a starting method thereof.
Background
In the starting process of the boiler steam soot blowing system, the steam inlet electric valve and the regulating valve work cooperatively to regulate high-temperature high-pressure steam into steam suitable for soot blowing. When the steam inlet electric valve is opened before soot blowing, the regulating valve starts to regulate the steam pressure according to PID parameters set by the system, and as no steam exists in the soot blowing steam pipeline initially, the pressure difference between the front and the rear of the pneumatic regulating valve is large, the PID automatic regulating speed is too high, so that the pressure of the steam soot blowing pipeline is quickly increased, on one hand, the cooled pipeline is impacted by high-temperature high-pressure steam, the service life of the pipeline is influenced, and on the other hand, the pressure is too fast to rise, and possibly exceeds the setting value of a safety valve protected by the soot blowing steam pipeline, so that the safety valve is lifted, and the normal operation of equipment is influenced.
Disclosure of Invention
The invention aims to provide a steam soot blowing system capable of preventing pipeline impact and a starting method thereof, which aim to solve the technical problems that a cooled pipeline is impacted by high-temperature high-pressure steam when the steam soot blowing system is started in the prior art, the service life of the pipeline is influenced, and the normal operation of equipment is influenced by the tripping of a safety valve.
The invention discloses a steam soot blowing system capable of preventing pipeline impact, which comprises a soot blowing steam pipeline, wherein one end of the soot blowing steam pipeline is connected with a steam source, the other end of the soot blowing steam pipeline is connected with one ends of a first soot blowing steam branch pipe and a second soot blowing steam branch pipe, the other ends of the first soot blowing steam branch pipe and the second soot blowing steam branch pipe are connected with a drainage pipeline, a steam inlet electric stop valve, a pressure reducing regulating valve, a safety valve and a pressure transmitter are arranged on the soot blowing steam pipeline, the first soot blowing steam branch pipe is connected with an air preheater soot blower through a pipeline, the second soot blowing steam branch pipe is connected with a hearth soot blower through a pipeline, and signal ends of control ends of the steam inlet electric stop valve, the pressure reducing regulating valve, the air preheater soot blower and the hearth soot blower are all connected with a controller.
The invention also provides a method for starting the steam soot blowing system, which is realized by utilizing the steam soot blowing system and can prevent pipeline impact, and the method comprises the following steps:
step one: opening an electric stop valve for steam inlet, and simultaneously starting a pressure reducing and regulating valve to work, wherein the opening of the pressure reducing and regulating valve is opened in sections;
step two: after the opening of the pressure reducing regulating valve reaches 5%, maintaining for more than 5 minutes;
step three: after the opening of the pressure reducing regulating valve reaches 10%, maintaining for more than 5 minutes;
step four: after the opening of the pressure reducing regulating valve reaches 15%, maintaining for more than 5 minutes;
step five: the pressure reducing and regulating valve regulates the pressure according to the set pressure and the feedback pressure;
step six: and starting the air preheater soot blower and the hearth soot blower to purge.
Compared with the prior art, the invention has positive and obvious effects.
1. The opening of the pressure reducing regulating valve is opened in a sectional and slow way, a plurality of fixed openings from small to large can be respectively set according to the conditions of normal drainage and soot blowing opening of the pressure reducing regulating valve, each opening is kept for a set time, and after steam is stabilized, the cooled soot blowing steam pipeline can be prevented from being impacted by a large amount of high-temperature high-pressure steam through PID automatic regulation of the pressure reducing regulating valve, the service life of the pipeline is prolonged, and the safety valve is prevented from jumping to influence normal operation.
2. The opening degree of the decompression regulating valve is smaller, a small amount of steam slowly enters the cooled soot blowing steam pipeline, so that the pipeline is slowly warmed, and the pipeline is also protected; in addition, a small amount of steam slowly enters the cooled soot blowing steam pipeline and is condensed into water, and the condensed water can enter the drainage pipeline more easily due to the fact that the steam is less and the pressure is very low.
Drawings
FIG. 1 is a schematic diagram of a steam sootblowing system for preventing pipeline impingement according to the present invention.
Detailed Description
The present invention is further described in connection with the following examples, but the present invention is not limited to the examples, and all the similar structures and similar variations using the present invention should be included in the protection scope of the present invention. The use of the directions of up, down, front, back, left, right, etc. in the present invention is only for convenience of description, and is not a limitation of the technical scheme of the present invention.
As shown in fig. 1, the steam soot blowing system capable of preventing pipeline impact comprises a soot blowing steam pipeline 1, one end of the soot blowing steam pipeline 1 is connected with a steam source 6, the other end of the soot blowing steam pipeline 1 is connected with one ends of a first soot blowing steam branch pipe 7 and a second soot blowing steam branch pipe 8, the other ends of the first soot blowing steam branch pipe 7 and the second soot blowing steam branch pipe 8 are connected with a drainage pipeline 9, an intake electric stop valve 2, a decompression regulating valve 3, a safety valve 4 and a pressure transmitter 5 are arranged on the soot blowing steam pipeline 1, an air preheater soot blower 10 is connected on the first soot blowing steam branch pipe 7 through a pipeline, a hearth soot blower 13 is connected on the second soot blowing steam branch pipe 8 through a pipeline, and signal ends of control ends of the intake electric stop valve 2, the decompression regulating valve 3, the air preheater soot blower 10 and the hearth soot blower 13 are all connected with a controller.
The invention also provides a method for starting the steam soot blowing system, which is realized by utilizing the steam soot blowing system and can prevent pipeline impact, and the method comprises the following steps:
step one: opening an electric stop valve 2 for steam inlet, starting the pressure reducing and regulating valve 3 to work, and opening the pressure reducing and regulating valve 3 in a sectional manner;
step two: after the opening of the pressure reducing and regulating valve 3 reaches 5%, maintaining for more than 5 minutes;
step three: after the opening of the pressure reducing and regulating valve 3 reaches 10%, maintaining for more than 5 minutes;
step four: after the opening of the pressure reducing and regulating valve 3 reaches 15%, maintaining for more than 5 minutes;
step five: the pressure reducing and regulating valve 3 regulates the pressure according to the set pressure and the feedback pressure;
step six: the air preheater soot blower 10 and the hearth soot blower 13 are started to purge.
Specifically, the soot blowing system is an indirectly operated system, and when the system is not operated at ordinary times, the whole pipeline is in a cooling state (basically the same as the weather temperature), so that when the soot blowing pipeline system is started, the soot blowing pipeline is prevented from being damaged due to thermal shock caused by soot blowing steam on the pipeline, and a heating pipe process is required to be operated on the soot blowing pipeline; the steam soot blowing system heating pipe begins to drain, the soot blowing steam source steam inlet electric stop valve 2 is opened, the pressure reducing regulating valve 3 begins to work when the steam inlet electric stop valve 2 is opened, and the pressure difference between the front and the back is prevented from being too large when the pressure reducing regulating valve 3 is opened. After the opening of the pressure reducing and regulating valve 3 reaches 5%, the opening is maintained for 5 minutes or more, then the opening of the pressure reducing and regulating valve 3 is controlled to 10% and maintained for 5 minutes or more, and after the opening of the pressure reducing and regulating valve 3 is controlled to 15% and maintained for 5 minutes or more. After the above process is completed, the soot blowing pipeline system starts to enter a normal heating pipe state, the control of the pressure reducing and regulating valve 3 is switched to a normal regulating state, and the pipeline system starts to be heated by normal drainage pressure. The opening degree and time of the above pressure reducing and regulating valve 3 can be adjusted according to the specific situation.
Specifically, the steam inlet electric stop valve 2, the pressure reducing and regulating valve 3, the safety valve 4, the pressure transmitter 5, the air preheater soot blower 10, the hearth soot blower 13, the controller and the like in this embodiment all adopt well-known schemes in the prior art, and those skilled in the art will understand that the description is omitted here.
The invention has the advantages that:
1. the opening of the pressure reducing regulating valve 3 is opened in a sectional and slow way, a plurality of fixed openings from small to large can be respectively set according to the conditions of normal drainage and soot blowing opening of the pressure reducing regulating valve 3, each opening is kept for a set time, and after steam is stabilized, the pressure reducing regulating valve 3 is automatically regulated to control through PID, so that the cooled soot blowing steam pipeline 1 can be prevented from being impacted by a large amount of high-temperature high-pressure steam, the service life of the pipeline is prolonged, and the safety valve 4 is prevented from jumping to influence the normal operation.
2. The opening degree of the decompression regulating valve 3 is smaller, a small amount of steam slowly enters the cooled soot blowing steam pipeline 1, so that the pipeline is slowly warmed, and the pipeline is also protected; in addition, a small amount of steam slowly enters the cooled soot blowing steam pipeline 1 to be condensed into water, and the condensed water can enter the drainage pipeline 9 more easily due to the fact that the steam is less and the pressure is very low.
Claims (2)
1. A steam soot blowing system capable of preventing pipeline impact is characterized in that: including the soot blowing steam line, the one end of soot blowing steam line is connected with the steam air supply, and the other end of soot blowing steam line is connected with the one end of first soot blowing steam branch pipe, second soot blowing steam branch pipe, and the other end and the drainage pipeline of first soot blowing steam branch pipe, second soot blowing steam branch pipe are connected, are provided with the electronic stop valve of admission, decompression governing valve, relief valve, pressure transmitter on the soot blowing steam line, have the air preheater soot blower through the pipe connection on the first soot blowing steam branch pipe, have the furnace soot blower through the pipe connection on the second soot blowing steam branch pipe, the signal terminal of the control end of admission electronic stop valve, decompression governing valve, air preheater soot blower, furnace soot blower all is connected with a controller.
2. A method for starting a steam soot blowing system capable of preventing pipeline impact by using the steam soot blowing system of claim 1, which is characterized in that: the method comprises the following steps:
step one: opening an electric stop valve for steam inlet, and simultaneously starting a pressure reducing and regulating valve to work, wherein the opening of the pressure reducing and regulating valve is opened in sections;
step two: after the opening of the pressure reducing regulating valve reaches 5%, maintaining for more than 5 minutes;
step three: after the opening of the pressure reducing regulating valve reaches 10%, maintaining for more than 5 minutes;
step four: after the opening of the pressure reducing regulating valve reaches 15%, maintaining for more than 5 minutes;
step five: the pressure reducing and regulating valve regulates the pressure according to the set pressure and the feedback pressure;
step six: and starting the air preheater soot blower and the hearth soot blower to purge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311697831.4A CN117537355A (en) | 2023-12-11 | 2023-12-11 | Steam soot blowing system capable of preventing pipeline impact and starting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311697831.4A CN117537355A (en) | 2023-12-11 | 2023-12-11 | Steam soot blowing system capable of preventing pipeline impact and starting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117537355A true CN117537355A (en) | 2024-02-09 |
Family
ID=89786113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311697831.4A Pending CN117537355A (en) | 2023-12-11 | 2023-12-11 | Steam soot blowing system capable of preventing pipeline impact and starting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117537355A (en) |
-
2023
- 2023-12-11 CN CN202311697831.4A patent/CN117537355A/en active Pending
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