CN104501650A - Method for eliminating W and U type pipeline air jam - Google Patents
Method for eliminating W and U type pipeline air jam Download PDFInfo
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- CN104501650A CN104501650A CN201410578195.8A CN201410578195A CN104501650A CN 104501650 A CN104501650 A CN 104501650A CN 201410578195 A CN201410578195 A CN 201410578195A CN 104501650 A CN104501650 A CN 104501650A
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Abstract
The invention discloses a method for eliminating W and U type pipeline air jam. The method comprises the steps that 1, the two ends of a system inlet and outlet pipe connected with a W and U type pipeline are connected with temporary pipelines respectively, and the two ends of the W and U type pipeline are isolated and sealed through temporary valves; 2, an air exhaust hole and an air inflation hole are formed in the temporary pipelines at the two ends of the isolation sealing segment of the W and U type pipeline, and are connected with a vacuum pump and an inflation source respectively; 3, the vacuum pump is adopted to carry out vacuumizing on the isolation sealing segment of the W and U type pipeline, air exhausting is continuously kept, soluble gas X is inflated, repeated operation is carried out, and the air source is closed until the interior of the isolation sealing segment of the W and U type pipeline is completely replaced by the inflated soluble gas X; and 4, the temporary valve at one end of the W and U type pipeline is opened, aqueous solutions slowly enter the pipeline, the inflated soluble gas can be completely dissolved in the solutions, and no new gas is generated. The problem that the air jam is generated in the earlier stage that the W and U type pipeline is chemically cleaned is solved, and the guarantee is provided for smooth operation of subsequent chemical cleaning, the cleaning effect and normal starting and running of a power station.
Description
Technical field
The present invention relates to a kind of W type and cleaning technique field, U-tube road, be specifically related to a kind of W type and U-shaped pipeline air jam removing method.
Background technology
After W type and U heat exchange road (as superheater, reheater etc.) run to certain hour, need to adopt Chemical cleaning to remove the dirt (being mainly the oxide of iron) that in running, heat-transfer surface generates, the risk come off with the thermal efficiency and reduction oxide skin that improve boiler.W type and the cleaning of U-tube Dow Chemical in earlier stage, usually adopt directly upper water to carry out water flushing, adopt these methods to there is following shortcoming:
1) W type and the cleaning of U-tube Dow Chemical are directly gone up in the process of water, in W type and U-tube, easily form vent plug;
2) if W type and the cleaning of U-tube Dow Chemical produce vent plug early stage, the later stage takes dredging measure more numerous and not easily dredges;
3) produce vent plug in upper water process, thus cause section of tubing blocking in Process of Chemical Cleaning, booster phenomenon when causing opening machine.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of W type and U-shaped pipeline air jam removing method, eliminate W type and the cleaning of U-tube Dow Chemical produces the problem of vent plug early stage, normally open machine for the carrying out smoothly of subsequent chemistry cleaning, cleaning performance and power station and run and provide guarantee.
In order to reach above object, the present invention adopts following technical scheme:
A kind of W type and U-shaped pipeline air jam removing method, is characterized in that: comprise the steps:
Step 1: connection W type is connected with temporary pipeline respectively with the system inlet/outlet pipe two ends in U-tube road, and temporary valve isolating seal is adopted to W type and U-shaped pipe ends;
Step 2: aspirating hole and air-filled pore are set respectively on the temporary pipeline at W type and isolating seal section two ends, U-tube road, and are connected with vavuum pump and source of inflation gas respectively;
Step 3: adopt vavuum pump to vacuumize W type and U-tube road isolating seal section, continues maintenance and bleeds and pour soluble gas X, repeatedly operate, until this pipeline section is all replaced into be filled with soluble gas X, closes source of the gas;
Step 4: the temporary valve of opening W type and one end, U-tube road, slowly water inlet solution rinses.
Described soluble gas X refers to the gas of solution soluble in water.
The described aqueous solution refers to demineralized water, neutral aqueous solution, acid washing water solution or alkaline aqueous solution.
Described soluble gas X is NO
2, NH
3, HCl, HF, HBr, HI, Cl
2or F
2.
Described employing vavuum pump vacuumizes W type and U-tube road isolating seal section, and its vacuum is-0.05 ~-0.10MPa.
Compared to the prior art, the present invention has the following advantages:
1) vent plug of W type and U-tube Dow Chemical cleaning generation in early stage can be eliminated completely.
2) what guarantee W type and U-tube road subsequent chemistry were cleaned carries out smoothly.
3) after reducing W type and the cleaning of U-tube Dow Chemical, the booster phenomenon produced because of line clogging during unit starting.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further details.
A kind of W type of the present invention and U-shaped pipeline air jam removing method, is characterized in that: comprise the steps:
Step 1: connection W type is connected with temporary pipeline respectively with the system inlet/outlet pipe two ends in U-tube road, and temporary valve isolating seal is adopted to W type and U-shaped pipe ends;
Step 2: aspirating hole and air-filled pore are set respectively on the temporary pipeline at W type and isolating seal section two ends, U-tube road, and are connected with vavuum pump and source of inflation gas respectively;
Step 3: adopt vavuum pump to vacuumize W type and U-tube road isolating seal section, continues maintenance and bleeds and pour soluble gas X, repeatedly operate, until this pipeline section is all replaced into be filled with soluble gas X, closes source of the gas;
Step 4: the temporary valve of opening W type and one end, U-tube road, slowly water inlet solution rinses.
As the preferred embodiment of the present invention, described soluble gas X refers to the gas of solution soluble in water, and the soluble gas be filled with can be dissolved in the aqueous solution completely, and generates without new gas.As being filled with NO
2, NH
3, HCl, HF, HBr, HI, Cl
2, F
2deng.
As the preferred embodiment of the present invention, the described aqueous solution refers to demineralized water, neutral aqueous solution, acid washing water solution or alkaline aqueous solution.
As the preferred embodiment of the present invention, described employing vavuum pump vacuumizes W type and U-tube road isolating seal section, and its vacuum is-0.05 ~-0.10MPa.
Claims (5)
1. W type and a U-shaped pipeline air jam removing method, is characterized in that: comprise the steps:
Step 1: connection W type is connected with temporary pipeline respectively with the system inlet/outlet pipe two ends in U-tube road, and temporary valve isolating seal is adopted to W type and U-shaped pipe ends;
Step 2: aspirating hole and air-filled pore are set respectively on the temporary pipeline at W type and isolating seal section two ends, U-tube road, and are connected with vavuum pump and source of inflation gas respectively;
Step 3: adopt vavuum pump to vacuumize W type and U-tube road isolating seal section, continues maintenance and bleeds and pour soluble gas X, repeatedly operate, until this pipeline section is all replaced into be filled with soluble gas X, closes source of the gas;
Step 4: the temporary valve of opening W type and one end, U-tube road, slowly water inlet solution rinses.
2. W type according to claim 1 and U-shaped pipeline air jam removing method, is characterized in that: described soluble gas X refers to the gas of solution soluble in water.
3. W type according to claim 2 and U-shaped pipeline air jam removing method, is characterized in that: the described aqueous solution refers to demineralized water, neutral aqueous solution, acid washing water solution or alkaline aqueous solution.
4. W type according to claim 2 and U-shaped pipeline air jam removing method, is characterized in that: described soluble gas X is NO
2, NH
3, HCl, HF, HBr, HI, Cl
2or F
2.
5. W type according to claim 1 and U-shaped pipeline air jam removing method, is characterized in that: described employing vavuum pump vacuumizes W type and U-tube road isolating seal section, and its vacuum is-0.05 ~-0.10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410578195.8A CN104501650B (en) | 2014-10-24 | 2014-10-24 | A kind of W type and U-shaped pipeline air jam removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410578195.8A CN104501650B (en) | 2014-10-24 | 2014-10-24 | A kind of W type and U-shaped pipeline air jam removing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104501650A true CN104501650A (en) | 2015-04-08 |
| CN104501650B CN104501650B (en) | 2017-03-01 |
Family
ID=52943076
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410578195.8A Active CN104501650B (en) | 2014-10-24 | 2014-10-24 | A kind of W type and U-shaped pipeline air jam removing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211603A (en) * | 2018-10-19 | 2019-01-15 | 中国民航大学 | A kind of experimental rig formed for simulating vent plug with pneumatosis discharge characteristic |
Citations (5)
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|---|---|---|---|---|
| CN102269400A (en) * | 2011-07-26 | 2011-12-07 | 西安热工研究院有限公司 | Feeding device for hydrogen peroxide in chemical cleaning of power plant boiler |
| CN202836340U (en) * | 2012-08-08 | 2013-03-27 | 华电潍坊发电有限公司 | Chemical washing device for boiler superheater |
| CN202915824U (en) * | 2012-11-21 | 2013-05-01 | 天津市通洁高压泵制造有限公司 | Heat exchanger shell pass washing device |
| CN202915823U (en) * | 2012-11-21 | 2013-05-01 | 天津市通洁高压泵制造有限公司 | Heat exchanger tube pass washing device |
| CN203540755U (en) * | 2013-10-11 | 2014-04-16 | 江苏科能电力机械有限公司 | Gas-liquid mixed jet head of air-cooling radiator cleaning machine |
-
2014
- 2014-10-24 CN CN201410578195.8A patent/CN104501650B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269400A (en) * | 2011-07-26 | 2011-12-07 | 西安热工研究院有限公司 | Feeding device for hydrogen peroxide in chemical cleaning of power plant boiler |
| CN202836340U (en) * | 2012-08-08 | 2013-03-27 | 华电潍坊发电有限公司 | Chemical washing device for boiler superheater |
| CN202915824U (en) * | 2012-11-21 | 2013-05-01 | 天津市通洁高压泵制造有限公司 | Heat exchanger shell pass washing device |
| CN202915823U (en) * | 2012-11-21 | 2013-05-01 | 天津市通洁高压泵制造有限公司 | Heat exchanger tube pass washing device |
| CN203540755U (en) * | 2013-10-11 | 2014-04-16 | 江苏科能电力机械有限公司 | Gas-liquid mixed jet head of air-cooling radiator cleaning machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211603A (en) * | 2018-10-19 | 2019-01-15 | 中国民航大学 | A kind of experimental rig formed for simulating vent plug with pneumatosis discharge characteristic |
| CN109211603B (en) * | 2018-10-19 | 2023-06-27 | 中国民航大学 | Test device for simulating air plug formation and air accumulation and discharge characteristics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104501650B (en) | 2017-03-01 |
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