CN201836872U - Water supply heater of boiler - Google Patents
Water supply heater of boiler Download PDFInfo
- Publication number
- CN201836872U CN201836872U CN2010205559762U CN201020555976U CN201836872U CN 201836872 U CN201836872 U CN 201836872U CN 2010205559762 U CN2010205559762 U CN 2010205559762U CN 201020555976 U CN201020555976 U CN 201020555976U CN 201836872 U CN201836872 U CN 201836872U
- Authority
- CN
- China
- Prior art keywords
- feedwater
- boiler
- water supply
- heating tube
- blending bin
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- 239000003546 flue gas Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model provides a water supply heater of a boiler. As the water supply heater can realize that the temperature of a metal wall of a last-stage coal economizer of the boiler is higher than that of smoke dew points, low-temperature corrosion cannot be caused, so as to ensure that smoke of the boiler can normally enter a smoke evolving system at the next stage. The technical scheme of the water supply heater is as follows: the water supply heater comprises a boiler cylinder and the last-stage coal economizer, and is characterized in that a water supply heating pipe is installed in a steam space of the boiler cylinder, an outlet of the water supply heating pipe is led to an inlet collection box of the last-stage coal economizer, and a water inlet of the water supply heating pipe is externally connected with a main water supply pipeline.
Description
Technical field
The utility model relates to the mechanical structure field of waste heat boiler, is specially a kind of feed-water heater of boiler.
Background technology
Owing to contain many HCl, SO in the flue gas that the consumer waste incineration waste heat boiler is produced
2, SO
3, harmful substance such as HF etc., need prevent economizer generation cold end corrosion, when cold end corrosion takes place for it, generally be positioned at the final stage economizer, this moment, the tube wall temperature of final stage economizer was lower than the flue gas dew point temperature, and wherein the metallic walls temperature of economizer and exhaust gas temperature, interior media temperature are relevant.
Existing waste heat boiler is when nominal operating conditions, and the exhaust gas temperature height is so the tube wall temperature of final stage economizer still is higher than the flue gas dew point temperature; But when boiler startup and boiler at low load operation, exhaust gas temperature is lower usually, make the tube wall temperature of final stage economizer of boiler be lower than the flue gas dew point temperature like this, more easily cause cold end corrosion, make the flue gas purification system of next stage can't bring into play due effectiveness.
Summary of the invention
At the problems referred to above, the utility model provides a kind of feed-water heater of boiler, and it makes the tube wall temperature of boiler final stage economizer be higher than the flue gas dew point temperature, cold end corrosion can not take place, and guarantees that boiler smoke normally enters into the flue gas evolutionary system of next stage.
A kind of feed-water heater of boiler, its technical scheme is such: it comprises drum, final stage economizer, it is characterized in that: the feedwater heating tube is housed in the air space of described drum, the inlet collection case of described final stage economizer, the external main feed line of the water inlet of described feedwater heating tube are led in the outlet of described feedwater heating tube.
It is further characterized in that: water inlet place of described main feed line connects the import of electronic feedwater three-way control valve, two outlets of described electronic feedwater three-way control valve connect water inlet, the feedwater blending bin of the heating tube that feeds water respectively, described feedwater blending bin is led in the outlet of described feedwater heating tube, the inlet collection case of described final stage economizer is led in the water side of described feedwater blending bin, and the water side of described feedwater blending bin is equipped with thermocouple;
Described electronic feedwater three-way control valve, feedwater blending bin, thermocouple all are installed on the main feedwater operation bench;
Described feedwater heating tube is in the snakelike air space that is arranged in described drum.
After adopting structure of the present utility model, the inlet collection case of the current direction final stage economizer of the air space heating of process drum, cause the medium temperature in the final stage economizer to raise, under the certain situation of exhaust gas temperature, the tube wall temperature of final stage economizer obtains raising than original boiler structure, make the tube wall temperature of boiler final stage economizer be higher than the flue gas dew point temperature, cold end corrosion can not take place, guarantee that boiler smoke normally enters into the flue gas evolutionary system of next stage.
Description of drawings
Fig. 1 is a front view structural representation of the present utility model.
The specific embodiment
See Fig. 1, it comprises drum 1, final stage economizer 2, and feedwater heating tube 3 is housed in the air space of drum 1, and the inlet collection case 4 of final stage economizer 2 is led in the outlet of feedwater heating tube 3, the external main feed line 6 of water inlet of feedwater heating tube 3.Water inlet place of main feed line 6 connects the import 8 of electronic feedwater three-way control valve 7, two outlets 9,10 of electronic feedwater three-way control valve 7 connect water inlet, the feedwater blending bin 5 of feedwater heating tube 3 respectively, feedwater blending bin 5 is led in the outlet of feedwater heating tube 3, the inlet collection case 4 of final stage economizer 2 is led in the water side of feedwater blending bin 5, and the water side of feedwater blending bin 5 is equipped with thermocouple 11; Electronic feedwater three-way control valve 7, feedwater blending bin 5, thermocouple 11 all are installed on the main feedwater operation bench 12; Feedwater heating tube 3 is in the snakelike air space that is arranged in drum 1.13 water inlet pipes among the figure for feedwater heating tube 3,14 outlet pipes for feedwater heating tube 3.The direction of arrow is the mobile direction of water among the figure.
Its operation principle is as follows: electronic feedwater three-way control valve 7, a part flows into feedwater heating tube 3, in drum 1, flow out after the saturated vapor heating, enter the feedwater blending bin 5 on the feedwater console 12, after feedwater blending bin 5 mixes fully, flow to the inlet collection case 4 of final stage economizer 2;
The water side of feedwater blending bin 5 is equipped with thermocouple 11, mix the flow size that back temperature thermocouple 11 is regulated 7 three paths of electronic feedwater three-way control valve according to feedwater blending bin 5, can effectively improve the feed temperature of boiler like this, make the tube wall temperature of final stage economizer 2 be higher than the flue gas dew point temperature.
Claims (4)
1. the feed-water heater of a boiler, it comprises drum, final stage economizer, it is characterized in that: the feedwater heating tube is housed in the air space of described drum, and the inlet collection case of described final stage economizer, the external main feed line of the water inlet of described feedwater heating tube are led in the outlet of described feedwater heating tube.
2. the feed-water heater of a kind of boiler according to claim 1, it is characterized in that: water inlet place of described main feed line connects the import of electronic feedwater three-way control valve, two outlets of described electronic feedwater three-way control valve connect water inlet, the feedwater blending bin of the heating tube that feeds water respectively, described feedwater blending bin is led in the outlet of described feedwater heating tube, the inlet collection case of described final stage economizer is led in the water side of described feedwater blending bin, and the water side of described feedwater blending bin is equipped with thermocouple.
3. the feed-water heater of a kind of boiler according to claim 2 is characterized in that: described electronic feedwater three-way control valve, feedwater blending bin, thermocouple all are installed on the main feedwater operation bench.
4. the feed-water heater of a kind of boiler according to claim 3 is characterized in that: described feedwater heating tube is in the snakelike air space that is arranged in described drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205559762U CN201836872U (en) | 2010-10-11 | 2010-10-11 | Water supply heater of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205559762U CN201836872U (en) | 2010-10-11 | 2010-10-11 | Water supply heater of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201836872U true CN201836872U (en) | 2011-05-18 |
Family
ID=44006979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205559762U Expired - Fee Related CN201836872U (en) | 2010-10-11 | 2010-10-11 | Water supply heater of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201836872U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042583A (en) * | 2010-10-11 | 2011-05-04 | 无锡华光锅炉股份有限公司 | Feed water heater of boiler |
| CN103727519A (en) * | 2013-10-25 | 2014-04-16 | 华西能源工业股份有限公司 | Device for preventing low-temperature corrosion of economizer heating surface |
| CN106224936A (en) * | 2016-08-25 | 2016-12-14 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of low-level (stack-gas) economizer optimizes operation control system and control method thereof |
| CN107208876A (en) * | 2015-02-10 | 2017-09-26 | 三菱重工业株式会社 | Boiler water supply system, boiler provided with same, and control method for boiler water supply system |
| CN107859985A (en) * | 2017-12-11 | 2018-03-30 | 中煤科工清洁能源股份有限公司 | A kind of feed water system of boiler |
| CN108775573A (en) * | 2018-06-20 | 2018-11-09 | 江西四冶钢结构有限责任公司 | A kind of novel electricity generation boiler of burning away the refuse |
-
2010
- 2010-10-11 CN CN2010205559762U patent/CN201836872U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042583A (en) * | 2010-10-11 | 2011-05-04 | 无锡华光锅炉股份有限公司 | Feed water heater of boiler |
| CN103727519A (en) * | 2013-10-25 | 2014-04-16 | 华西能源工业股份有限公司 | Device for preventing low-temperature corrosion of economizer heating surface |
| CN107208876A (en) * | 2015-02-10 | 2017-09-26 | 三菱重工业株式会社 | Boiler water supply system, boiler provided with same, and control method for boiler water supply system |
| CN107208876B (en) * | 2015-02-10 | 2018-09-18 | 三菱重工业株式会社 | Boiler feed water system, boiler equipped with the boiler feed water system, and control method for the boiler feed water system |
| CN106224936A (en) * | 2016-08-25 | 2016-12-14 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of low-level (stack-gas) economizer optimizes operation control system and control method thereof |
| CN106224936B (en) * | 2016-08-25 | 2018-11-27 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of control method of low-level (stack-gas) economizer optimization operation control system |
| CN107859985A (en) * | 2017-12-11 | 2018-03-30 | 中煤科工清洁能源股份有限公司 | A kind of feed water system of boiler |
| CN108775573A (en) * | 2018-06-20 | 2018-11-09 | 江西四冶钢结构有限责任公司 | A kind of novel electricity generation boiler of burning away the refuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20181011 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |