CN104406155A - Connecting pipe for improving water temperature of coal economizer - Google Patents
Connecting pipe for improving water temperature of coal economizer Download PDFInfo
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- CN104406155A CN104406155A CN201410694537.2A CN201410694537A CN104406155A CN 104406155 A CN104406155 A CN 104406155A CN 201410694537 A CN201410694537 A CN 201410694537A CN 104406155 A CN104406155 A CN 104406155A
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- economizer
- coal economizer
- water temperature
- improving
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Abstract
The invention discloses a connecting pipe for improving the water temperature of a coal economizer. Existing sub-critical 300 MW and 600 MW boilers cannot meet denitration needs. When the boiler runs under a low load, the flue gas temperature at the outlet of the coal economizer cannot reach the lowest continuous running temperature for the normal denitration. The connecting pipe for improving the water temperature of the coal economizer comprises a coal economizer bypass pipe (1), and one end of the coal economizer bypass pipe is connected with a coal economizer outlet header (2) while the other end is connected with a coal economizer inlet header (3); the coal economizer bypass pipe comprises two semi-rectangular annular pipes, an electric adjusting valve (4) is arranged between the two semi-rectangular annular pipes, the semi-rectangular annular pipes are suspended by a suspension device (5), the semi-rectangular annular pipes are provided with a deflation valve (6) and a drain valve (7), and the vertical pipe of the semi-rectangular annular pipes is provided with a guide device (8). The connecting pipe for improving the water temperature of the coal economizer is used for improving the water temperature of the coal economizer.
Description
technical field:
the present invention relates to a kind of tube connector for improving economizer water temperature.
background technology:
according to national environmental protection policy and requirement, out of stock device is installed to existing thermal power generation unit.Existing subcritical 300MW, 600MW boiler does not possess denitration condition.When boiler at low load runs, economizer exit flue-gas temperature can not meet the minimum continuous running temperature of normal denitration.Therefore, in order to meet denitration requirement, just need to increase economizer exit flue-gas temperature.
summary of the invention:
the object of the present invention is to provide a kind of tube connector for improving economizer water temperature.
the object of the present invention is achieved like this:
for improving a tube connector for economizer water temperature, its composition comprises: economizer shunt valve, and described economizer shunt valve one end is connected with economizer exit header, and the other end is connected with economizer entrance header.
described economizer shunt valve comprises two and half square ring pipes, between half square ring pipe described in two, electric control valve is installed, half described square ring pipe is hung by erecting by overhang, half described square ring pipe is provided with vent valve, drain valve, and the pipe of the vertical layout of half described square ring pipe is provided with guider.
beneficial effect:
1. boiler load lower than 60% time, economizer exit cigarette temperature can not meet the minimum continuous running temperature of normal denitration lower than 316 DEG C.And the present invention is after setting up economizer shunt valve, economizer exit water temperature can increase by 10 ~ 15 DEG C (by bypassing the water of 25-20%), and economizer exit cigarette temperature can improve 30 DEG C, meets out of stock requirement.
. the present invention is bended near boiler structure platform two benefits:
(1) straight section due to pipeline is longer, and suitable bend pipe trend, improves the flexibility of pipe.
pipe level direction mounted valve near boiler structure platform, convenient operation.
the present invention is equipped with guider and erecting by overhang in economizer bypass conduit, has both played the effect of fixed-piping, and vibration problems when simultaneously also preventing conduit running, enhances the stability of conduit running and the service life of pipeline.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is side views of accompanying drawing 1.
detailed description of the invention:
embodiment 1:
for improving a tube connector for economizer water temperature, its composition comprises: economizer shunt valve 1, and described economizer shunt valve one end is connected with economizer exit header 2, and the other end is connected with economizer entrance header 3.
embodiment 2:
the tube connector for improving economizer water temperature described in embodiment 1, described economizer shunt valve comprises two and half square ring pipes, between half square ring pipe described in two, electric control valve 4 is installed, half described square ring pipe is hung by erecting by overhang 5, half described square ring pipe is provided with vent valve 6, drain valve 7, and the pipe of the vertical layout of half described square ring pipe is provided with guider 8.
embodiment 3:
the described tube connector for improving economizer water temperature, through repeatedly organizing experts' evaluation and carrying out feasibility analysis, analysis result thinks that it is feasible for setting up economizer bypass.When boiler load is normal, economizer bypass keeps closed condition.The flow of economizer bypass is determined according to SCR minimum steady provisioning request and underload economizer inlet port flue-gas temperature.The aperture position of economizer bypass is in economizer entrance header to economizer exit header exit, and boiler left and right sides installs a bypass respectively, and pipeline specifications is Φ 219 × 18, material 20G.
embodiment 4:
the described tube connector for improving economizer water temperature, the every bar bypass of economizer is all provided with electric control valve, and pipeline is also provided with hydrophobic and bleeder pipe joint, arranges temperature point 9 in economizer exit header simultaneously.When boiler runs at full capacity, economizer exit cigarette temperature can reach the temperature needed for denitration, load lower than 60% time, then can not meet the demands.Thus boiler at full capacity time, can shunt valve be enabled, therefore in bypass, add electric control valve.When the operation of reality, can according to actual conditions switch on/off electric control valve.When boiler is out of service, the steam water interface in pipeline be emitted, in bypass, be therefore provided with valve that is hydrophobic and venting.When bypass runs, conveniently detect the temperature of economizer exit header, be provided with two temperature points respectively in both sides, economizer exit place, electric control valve can be regulated according to carrying out practically situation, regulate bypass flow.
Claims (2)
1. for improving a tube connector for economizer water temperature, its composition comprises: economizer shunt valve, is characterized in that: described economizer shunt valve one end is connected with economizer exit header, and the other end is connected with economizer entrance header; Described economizer shunt valve comprises two and half square ring pipes.
2. the tube connector for improving economizer water temperature according to claim 1, it is characterized in that: between half square ring pipe described in two, electric control valve is installed, half described square ring pipe is hung by erecting by overhang, half described square ring pipe is provided with vent valve, drain valve, and the pipe of the vertical layout of half described square ring pipe is provided with guider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410694537.2A CN104406155A (en) | 2014-11-27 | 2014-11-27 | Connecting pipe for improving water temperature of coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410694537.2A CN104406155A (en) | 2014-11-27 | 2014-11-27 | Connecting pipe for improving water temperature of coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104406155A true CN104406155A (en) | 2015-03-11 |
Family
ID=52643803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410694537.2A Pending CN104406155A (en) | 2014-11-27 | 2014-11-27 | Connecting pipe for improving water temperature of coal economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104406155A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08233209A (en) * | 1995-02-27 | 1996-09-10 | Mitsubishi Heavy Ind Ltd | Discharged gas temperature adjusting device for boiler |
| CN203364109U (en) * | 2013-05-30 | 2013-12-25 | 万平 | SCR temperature regulating system of boiler |
| CN103939885A (en) * | 2014-03-28 | 2014-07-23 | 上海发电设备成套设计研究院 | Feedwater replacement type economizer system for whole commissioning of denitration device |
| CN203927879U (en) * | 2014-03-05 | 2014-11-05 | 东南大学 | A kind of economizer that improves SCR operational percentage under running on the lower load |
| CN204254588U (en) * | 2014-11-27 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | For improving the tube connector of economizer water temperature |
-
2014
- 2014-11-27 CN CN201410694537.2A patent/CN104406155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08233209A (en) * | 1995-02-27 | 1996-09-10 | Mitsubishi Heavy Ind Ltd | Discharged gas temperature adjusting device for boiler |
| CN203364109U (en) * | 2013-05-30 | 2013-12-25 | 万平 | SCR temperature regulating system of boiler |
| CN203927879U (en) * | 2014-03-05 | 2014-11-05 | 东南大学 | A kind of economizer that improves SCR operational percentage under running on the lower load |
| CN103939885A (en) * | 2014-03-28 | 2014-07-23 | 上海发电设备成套设计研究院 | Feedwater replacement type economizer system for whole commissioning of denitration device |
| CN204254588U (en) * | 2014-11-27 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | For improving the tube connector of economizer water temperature |
Non-Patent Citations (1)
| Title |
|---|
| 翟德双: "燃煤电厂锅炉超净排放技术改造探讨", 《华东电力》, vol. 42, no. 10, 31 October 2014 (2014-10-31) * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150311 |
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| RJ01 | Rejection of invention patent application after publication |