CN104858607A - Full-repairing technology for housing of desulphurization circulating pump - Google Patents
Full-repairing technology for housing of desulphurization circulating pump Download PDFInfo
- Publication number
- CN104858607A CN104858607A CN201510199374.5A CN201510199374A CN104858607A CN 104858607 A CN104858607 A CN 104858607A CN 201510199374 A CN201510199374 A CN 201510199374A CN 104858607 A CN104858607 A CN 104858607A
- Authority
- CN
- China
- Prior art keywords
- pump
- circulating pump
- full
- housing
- repairing technology
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Abstract
The invention discloses a full-repairing technology for a housing of a desulphurization circulating pump. The full-repairing technology comprises the following steps: performing welding framework processing on a worn and corroded pump housing; performing sand-blast machining on a pump body flow-passing surface and a welding framework; performing chemical cleaning under the conditions of wind prevention, dust prevention, and room temperature or normal temperature; polishing the circulating pump, and then coating the circulating pump with an abrasion-resistant and anti-corrosive material and the like. According to the full-repairing technology provided by the invention, after being repaired by adopting the full-repairing technology, the circulating pump can be continuously operated for 4000 hours or more, the housing of the circulating pump repaired by adopting the technology is intact integrally and an abrasion-resistant and anti-corrosive layer is prevented from peeling, cracking and the like, parts, easy to abrade, at an impeller ring, an impeller outlet and the like are free of obvious abrasion traces, the effect superior than expected effect is achieved, the service life of the pump housing is preliminarily estimated to be more than two years. The repairing technology is simple, and excellent in controllability.
Description
Technical field
The present invention relates to desulfurizer, particularly the full renovation technique of desulfuration recycle pump pump case.
Background technology
Desulfuration recycle pump in lime stone (lime)/gypsum wet flue gas desulfurizing system and device is called as " heart that desulfurizer runs ", pumped (conveying) medium is gypsum solid formation and the acid medium such as sulfuric acid, hydrochloric acid, these pumped (conveying) mediums can cause the positions such as desulfuration recycle pump pump case, impeller to occur the phenomenons such as serious cavitation erosion, abrasion and corrosion, affect service life and the desulfuration efficiency of circulating pump.Meanwhile, slurry circulating pump is again the big power consumer of desulphurization system, and the annual power consumption of slush pump that annual power run without interruption is 700KW is up to more than 300 ten thousand degree, and every platform circulating pump affects station service power consumption rate and is about 0.20-0.22%.So the carry out maintenance correct to circulating pump is the big event that electricity power enterprise " increases income and economizes on spending ".According to statistics, the main impact occurring following four aspects after circulating pump corrosive wear:
1, pit, coarse resistance when increasing overcurrent of the portion faces such as impeller, pump case;
2, impeller and pump case wearing and tearing cause pumping hole czermak space to become large, and the loss of pump becomes large;
3, carry out production strictly in line with rules and regulations in pump case leakage contribution scene, causes equipment to be stopped transport, affect desulfuration efficiency time serious;
4, when a circulating pump fault is stopped transport, the combined running mode of other circulations changes, and affects the economy of unit.
Therefore, the renovation technique of the circulating pump after research corrosive wear, tool is of great significance.
Summary of the invention
The object of this invention is to provide a kind of full renovation technique of desulfuration recycle pump pump case.
The technical scheme that the present invention realizes above-mentioned purpose is:
A full renovation technique for desulfuration recycle pump pump case, comprises the steps:
(1) according to the erosion corrosion degree of circulating pump pump case, in conjunction with the figure paper size of pump, welded framework process is carried out to the pump case after erosion corrosion;
(2) carry out sandblasting processing to circulating pump pump housing flow-passing surface and welded framework, thoroughly remove the iron rust in wetted surfaces, etch pit and impurity, the roughness controlled after sandblasting is 10 μm-50 μm;
(3) whole circulating pump is isolated, under windproof, dust-proof condition, under 20-30 DEG C (normal temperature or room temperature), carry out Chemical cleaning;
(4) circulating pump is polished, and coat abrasion resistant corrosion resistant material, strengthen wear resistant corrosion resistant and the surface smoothness of circulating pump further.
Further, the reagent of described Chemical cleaning is preferably acetone or happy safe 755 metal cleaners.
Further, described abrasion resistant corrosion resistant material is now with the current, and its preparation method is: be 4:1 by happy safe granule protective agent and supporting curing agent by 3:1(original scale) mass ratio mixing, adopt casting heap formula stirring means, Keep agitation 10-20 minute, until granule and curing agent are fully mixed thoroughly.The cohesive force of this corrosion and wear material of now joining significantly improves.
Beneficial effect of the present invention is:
(1) circulating pump after adopting method of the present invention to repair, continuous operation more than 4000 hours, circulating pump pump case entirety is intact, corrosion and wear layer without peeling off, the defect such as crackle, there is no noticeable wear vestige at the position easy to wear such as choma, impeller outlet simultaneously, exceeded expected effect, service life was more than 2 years according to a preliminary estimate.
(2) abrasion resistant corrosion resistant material of the present invention improves on the basis of existing technology, and cohesive force significantly improves, and has done larger contribution to the reparation of circulating pump.
(3) renovation technique of the present invention is simple, and controllability is good.
Accompanying drawing explanation
Fig. 1 is the wear map at the choma position of circulating pump pump case.
Fig. 2 is the overall repairing effect figure of circulating pump pump case.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further details, but the present invention is not limited to this.
Embodiment 1
The full renovation technique of desulfuration recycle pump pump case of the present invention, comprises the steps:
(1) according to the erosion corrosion degree of circulating pump pump case, in conjunction with the figure paper size of pump, welded framework process is carried out to the pump case after erosion corrosion;
(2) carry out sandblasting processing to pump housing flow-passing surface and welded framework, thoroughly remove the iron rust in wetted surfaces, etch pit and impurity, the roughness controlled after sandblasting is about 10 μm;
(3) whole pump is isolated, under windproof, dust-proof condition, under room temperature, carry out Chemical cleaning;
(4) extemporaneous preparation abrasion resistant corrosion resistant material: the mass ratio mixing of happy safe granule protective agent and supporting curing agent being pressed 3:1, adopt casting heap formula stirring means, Keep agitation 12 minutes, until granule and curing agent are fully mixed thoroughly;
(5) pump is polished, and coat step (4) gained abrasion resistant corrosion resistant material, strengthen wear resistant corrosion resistant and the surface smoothness of pump further.
Adopt said method to repair after circulating pump, run 4500 hours continuously, then check circulating pump pump case, result shows, overall intact, corrosion and wear layer without peeling off, the defect such as crackle.Do not have detailed wear trace at the position easy to wear such as choma, impeller outlet, exceeded expected effect, service life was more than 2 years according to a preliminary estimate.
Embodiment 2
The full renovation technique of desulfuration recycle pump pump case of the present invention, comprises the steps:
(1) according to the erosion corrosion degree of circulating pump pump case, in conjunction with the figure paper size of pump, welded framework process is carried out to the pump case after erosion corrosion;
(2) carry out sandblasting processing to pump housing flow-passing surface and welded framework, thoroughly remove the iron rust in wetted surfaces, etch pit and impurity, the roughness controlled after sandblasting is about 30 μm;
(3) whole pump is isolated, under windproof, dust-proof condition, under normal temperature, carry out Chemical cleaning;
(4) extemporaneous preparation abrasion resistant corrosion resistant material: the mass ratio mixing of happy safe granule protective agent and supporting curing agent being pressed 3:1, adopt casting heap formula stirring means, Keep agitation 15 minutes, until granule and curing agent are fully mixed thoroughly;
(5) pump is polished, and coat step (4) gained abrasion resistant corrosion resistant material, strengthen wear resistant corrosion resistant and surface smoothness further.
Adopt said method to repair after circulating pump, run 4000 hours continuously, then check circulating pump pump case, result shows, overall intact, corrosion and wear layer without peeling off, the defect such as crackle.Do not have detailed wear trace at the position easy to wear such as choma, impeller outlet, exceeded expected effect, service life was more than 2 years according to a preliminary estimate.
In above-described embodiment, circulating pump is as shown in table 1 in the parameter of running, and after adopting method of the present invention to repair circulating pump, circulating pump parameter in running is normal, stable.
The parameter of table 1 circulating pump in running
| Project | Unit | Numerical value | Standard |
| Horizontal vibration | mm | 0.02 | Be less than 0.07 |
| Vertical vibration | mm | 0.04 | Be less than 0.07 |
| Axial vibration | mm | 0.02 | Be less than 0.07 |
| Current of electric | A | 90 | 101 |
| Pump discharge pressure | Mp | 0.3 | 0.3 |
the security of technique of the present invention and economic benefit
1, site operation, substantially reduces maintenance workload and repair time, can complete within the overhaul time of circulating pump, and under waiting mal-condition in the winter time, construction period is no more than 3 days.
2, repair the parameters restoration designing value of rear pump, the parameters such as vibration, electric current, all in design standard, effectively raise the efficiency of pump.
3, owing to having saved the repair time, ensure that whole desulphurization system can recover the economy of desulfuration efficiency and operation as early as possible, improve the reliability of equipment.
4, energy-saving effect is obvious
Save recondition expense and procurement of replacement parts expense
A pump case buying expenses of Sulzer circulating pump is 600,000 yuan, and rehabilitation expense is 100,000 yuan, and every platform pump can save 500,000 yuan, and has saved the recondition expenses such as replacing, lifting, transport.
According to statistics because circulating pump weares and teares the many consumption of energy that causes up to 6-7%, every platform circulating pump can be reduced expenses after repairing 710KW X 5500h X 6% X 0.38 yuan/KWh=8.9 ten thousand yuan (annual utilization hours of desulphurization plant is designed to 5500h, and Pu Zhou power plant circulating pump motor is 710KW)
According to repair after the circulating pump life-span be 2 years calculate, above two every two years single pump can save 58.9 ten thousand yuan.
Claims (3)
1. a full renovation technique for desulfuration recycle pump pump case, is characterized in that comprising the steps:
(1) welded framework process is carried out to the pump case after erosion corrosion;
(2) carry out sandblasting processing to circulating pump pump housing flow-passing surface and welded framework, remove the iron rust in wetted surfaces, etch pit and impurity, the roughness controlled after sandblasting is 10 μm-50 μm;
(3) whole circulating pump is isolated, under windproof, dust-proof condition, under 20-30 DEG C of condition, carry out Chemical cleaning;
(4) circulating pump is polished, then coat abrasion resistant corrosion resistant material.
2. the full renovation technique of desulfuration recycle pump pump case according to claim 1, it is characterized in that: described abrasion resistant corrosion resistant material is now with the current, its preparation method is: happy safe granule protective agent and supporting curing agent are mixed by the mass ratio of 3:1, adopt casting heap formula stirring means, Keep agitation 10-20 minute, until granule and curing agent are fully mixed thoroughly.
3. the full renovation technique of desulfuration recycle pump pump case according to claim 1 and 2, is characterized in that: the reagent of described Chemical cleaning is acetone or happy safe 755 metal cleaners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199374.5A CN104858607A (en) | 2015-04-24 | 2015-04-24 | Full-repairing technology for housing of desulphurization circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199374.5A CN104858607A (en) | 2015-04-24 | 2015-04-24 | Full-repairing technology for housing of desulphurization circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104858607A true CN104858607A (en) | 2015-08-26 |
Family
ID=53905005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510199374.5A Pending CN104858607A (en) | 2015-04-24 | 2015-04-24 | Full-repairing technology for housing of desulphurization circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104858607A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736232A (en) * | 2016-12-29 | 2017-05-31 | 大唐贵州野马寨发电有限公司 | A kind of desulfurization slurry circulating pump impeller restorative procedure |
| CN110539125A (en) * | 2019-09-03 | 2019-12-06 | 齐齐哈尔众工科技有限公司 | method for repairing slurry circulating pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4050133A (en) * | 1976-06-07 | 1977-09-27 | Cretella Salvatore | Method of refurbishing turbine vanes and the like |
| CN1417370A (en) * | 2001-11-05 | 2003-05-14 | 牡丹江爱迪电力技术有限公司 | Spraying process of water erosion resisting coating for water turbine vanes |
| CN101787510A (en) * | 2010-01-13 | 2010-07-28 | 西安热工研究院有限公司 | Preparation technology of turbine though-flow part coating against solid particle erosion |
| CN101797676A (en) * | 2010-01-13 | 2010-08-11 | 西安热工研究院有限公司 | Repair and surface protection process of desulfuration recycle pump |
| CN102527618A (en) * | 2012-02-10 | 2012-07-04 | 何应吉 | Waste water pump repairing and coating method |
-
2015
- 2015-04-24 CN CN201510199374.5A patent/CN104858607A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4050133A (en) * | 1976-06-07 | 1977-09-27 | Cretella Salvatore | Method of refurbishing turbine vanes and the like |
| CN1417370A (en) * | 2001-11-05 | 2003-05-14 | 牡丹江爱迪电力技术有限公司 | Spraying process of water erosion resisting coating for water turbine vanes |
| CN101787510A (en) * | 2010-01-13 | 2010-07-28 | 西安热工研究院有限公司 | Preparation technology of turbine though-flow part coating against solid particle erosion |
| CN101797676A (en) * | 2010-01-13 | 2010-08-11 | 西安热工研究院有限公司 | Repair and surface protection process of desulfuration recycle pump |
| CN102527618A (en) * | 2012-02-10 | 2012-07-04 | 何应吉 | Waste water pump repairing and coating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736232A (en) * | 2016-12-29 | 2017-05-31 | 大唐贵州野马寨发电有限公司 | A kind of desulfurization slurry circulating pump impeller restorative procedure |
| CN110539125A (en) * | 2019-09-03 | 2019-12-06 | 齐齐哈尔众工科技有限公司 | method for repairing slurry circulating pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106736232A (en) | A kind of desulfurization slurry circulating pump impeller restorative procedure | |
| CN101892489A (en) | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof | |
| CN104858607A (en) | Full-repairing technology for housing of desulphurization circulating pump | |
| CN103937368B (en) | A kind of anticorrosion antiwear patching material | |
| CN106191881A (en) | A kind of efficient metal rust remover | |
| CN103194761A (en) | Cleaning agent for locally cleaning ironmaking blast furnace water-cooling wall in on-line loading manner and application thereof | |
| CN104962177A (en) | High-temperature-corrosion-resistant wear-resistant paint for power plant boiler pipelines and preparation method thereof | |
| CN102517574B (en) | Steel pipe surface treatment liquor and application method thereof | |
| CN201180674Y (en) | Anti-corrosion anti-dust fan impeller | |
| CN105925984B (en) | Deburring liquid for machining and preparation method thereof | |
| CN212130807U (en) | High-wear-resistance and corrosion-resistance desulphurization pump | |
| CN114226206A (en) | Method for rapidly repairing pump shell corrosion erosion of desulphurization pump on site | |
| CN207567101U (en) | A kind of 3D glass furnace pool walls cooling duct and its cooling system | |
| CN105750809A (en) | Repairing technique for impeller of circulating pump | |
| CN110644005A (en) | Maintenance repair agent for slewing bearing and preparation method thereof | |
| CN112980149A (en) | Wear-resistant ceramic material and application thereof in pump body repair | |
| CN205937232U (en) | Phosphoric acid tail gas fan impeller | |
| CN105643183B (en) | The restorative procedure of liquid-piston compressor impeller fragmentation under a kind of strong acid operating mode | |
| CN105201894A (en) | Slurry pump adopting novel abrasion-resistant structure | |
| CN104069995B (en) | A kind of means of defence for the system equipment that is corroded in sulphur fusion process | |
| CN104493100A (en) | Washing device of casting water-soluble salt core | |
| CN205173857U (en) | Pipeline with carborundum inside lining | |
| CN203809369U (en) | Horizontal type axial flow circulating delivery pump structure | |
| CN104988254B (en) | Online maintenance process for blast furnace slag processing granulation equipment | |
| CN112295877B (en) | Method for preventing local cavitation of flow passage component of water turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |
|
| RJ01 | Rejection of invention patent application after publication |