CN108758601A - Pre-heating mean outside a kind of natural circulation steam generator system and evaporator - Google Patents
Pre-heating mean outside a kind of natural circulation steam generator system and evaporator Download PDFInfo
- Publication number
- CN108758601A CN108758601A CN201810609131.8A CN201810609131A CN108758601A CN 108758601 A CN108758601 A CN 108758601A CN 201810609131 A CN201810609131 A CN 201810609131A CN 108758601 A CN108758601 A CN 108758601A
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- Prior art keywords
- evaporator
- drum
- water
- valve
- steam generator
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/02—Control systems for steam boilers for steam boilers with natural convection circulation
- F22B35/04—Control systems for steam boilers for steam boilers with natural convection circulation during starting-up periods, i.e. during the periods between the lighting of the furnaces and the attainment of the normal operating temperature of the steam boilers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Pre-heating mean outside a kind of natural circulation steam generator system and evaporator, belong to natural circulation steam generator technical field, the present invention cannot be passed directly into that heat source thermal shock is excessive, there are heat sources to be passed through risk to solve the problem of existing natural circulation steam generator.One end of supply line is connected by the first valve with water source, the other end is connected with the entrance of drum, first circulation pipeline is installed on drum, evaporator is mounted on first circulation pipeline, and evaporator is connected by second circulation pipe with supply line, and water circulating pump and external heater are provided on second circulation pipeline.Pre-heating mean can preheat steam generator outside a kind of natural circulation steam generator system and evaporator of the present invention, realize safely introducing for heat source, and then complete the startup of steam generator.
Description
Technical field
The present invention relates to pre-heating means outside a kind of evaporator system and evaporator, and in particular to a kind of Natural Circulation steam
Pre-heating mean outside generator system and evaporator, belongs to natural circulation steam generator technical field.
Background technology
Natural circulation steam generator is made of evaporator and drum, and heat source is generated by recirculated water in heating evaporation device
Saturated vapor, steam enter drum by tedge and are detached, and the water in drum then enters evaporator by down-comer, rely on
Carbonated drink density contrast realizes Natural Circulation.
When general nature cyclic steam generator starts, can heat source be directly passed through evaporator, be gradually heated up in evaporator
Recirculated water, finally make recirculated water reach saturation generate steam, to realize Natural Circulation.But it cannot be passed directly into for certain
Heat source (when such as fused salt is as heat source, if water temperature is too low, be easy to cause fused salt condensation, needs water temperature being preheating to certain temperature
Can just be passed through) steam generator, need to preheat water by outside.After generally heating water to required temperature, then lead to
Enter evaporator；Or draw water from drum, it is being heated.But both ways are excessive to the thermal shock of evaporator, or
Evaporator can not be preheated.
Invention content
The object of the present invention is to provide pre-heating means outside a kind of natural circulation steam generator system and evaporator, with solution
Certainly above-mentioned technical problem.
A kind of natural circulation steam generator system includes the first valve, supply line, drum, first circulation pipe, evaporation
Device, second circulation pipe, water circulating pump and external heater；
One end of the supply line is connected by the first valve with water source, and the other end is connected with the entrance of drum,
First circulation pipeline is installed on drum, evaporator is mounted on first circulation pipeline, and evaporator by second circulation pipe with
Supply line is connected, and water circulating pump and external heater are provided on second circulation pipeline.
Preferably：The second valve is also equipped on drum, the second valve connects work device by output pipe.
Pre-heating mean outside a kind of evaporator based on natural circulation steam generator system, includes the following steps：
Step 1, starts the first valve, and water supply enters drum by supply line, closed after certain water level is established in drum
Close the first valve and the second valve；
Step 2, ON cycle water pump and external heater enter supply line after the water heating in second circulation pipe, then
Enter drum by supply line, then enters evaporator by first circulation pipe, eventually pass back to second circulation pipe, it is final to realize
Water in evaporator and drum all preheats, and system pressure gradually rises, and the water in evaporator is in saturation state, water temperature always
Reach the temperature for needing to preheat, closes water circulating pump；
Heat source is passed through evaporator by step 3, by adjusting the aperture of the first valve and the second valve, makes pressure in drum
And water level is in desired value, the final Natural Circulation realized between evaporator and drum always.
The present invention has the following effects that compared with existing product：It can reach and steam generator is preheated, realize heat source
Safely introduce, and then complete steam generator startup；Natural circulation steam generator can be preheated, ensures steam generator
Heat source will not cause danger after being passed through, to realize cold start；
First by external heater, the water in evaporator and drum is heated, water temperature is made to be in higher temperature, it is full
Sufficient thermal medium is passed through temperature requirement (such as fuse salt being avoided to solidify), and because drum water-holding quantity is larger, a small amount of low temperature feedwater enters
In drum, too great fluctuation process will not be caused to water temperature, therefore can occur to avoid accident；
Water is gradually heated up by water circulating pump and external heater, when water temperature is passed through heat medium compared with Gao Shicai, is reduced
The temperature difference between thermal medium and water reduces heat medium and is passed through the thermal (temperature difference) stress generated when equipment, is more advantageous to extension equipment
Service life.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of natural circulation steam generator system of the present invention.
In figure：The first valves of 1-, 2- supply lines, 3- drums, 4- first circulations pipe, 5- evaporators, 8- second circulations pipe,
9- water circulating pumps, 10- external heaters, the second valves of 11-.
Specific implementation mode
The preferred embodiment of the present invention is elaborated below according to attached drawing.
As shown in Figure 1, a kind of natural circulation steam generator system of the present invention includes the first valve 1, feed pipe
Road 2, drum 3, first circulation pipe 4, evaporator 5, second circulation pipe 8, water circulating pump 9 and external heater 10；
One end of supply line 2 is connected by the first valve 1 with water source, and the other end is connected with the entrance of drum 3, vapour
First circulation pipeline 4 is installed, evaporator 5 is mounted on first circulation pipeline 4, and evaporator 5 passes through second circulation pipe on packet 3
8 are connected with supply line 2, and water circulating pump 9 and external heater 10 are provided on second circulation pipeline 8.
Further：The second valve 11 is also equipped on drum 3, the second valve 11 connects work device by output pipe.
Pre-heating mean outside a kind of evaporator based on natural circulation steam generator system, includes the following steps：
Step 1, starts the first valve 1, and water supply enters drum 3 by supply line 2, certain water level is established in drum 3
After close the first valve 1 and the second valve 11；
Step 2, ON cycle water pump 9 and external heater 10 enter feed pipe after the water heating in second circulation pipe 8
Road 2, enters drum 3 using supply line 2, then passes through first circulation pipe 4 and enters evaporator 5, eventually passes back to second circulation
Pipe 8, the final water realized in evaporator 5 and drum 3 all preheat, and system pressure gradually rises, and the water in evaporator 5 is located always
In saturation state, water temperature reaches the temperature for needing to preheat, and closes water circulating pump；
Heat source is passed through evaporator 5 by step 3, by adjusting the aperture of the first valve 1 and the second valve 11, is made in drum
3 pressure and water level are in desired value, the final Natural Circulation realized between evaporator 5 and drum 3 always.
Operation principle：Certain water level is established in drum, is closed the first valve, is then passed through the water circulating pump on evaporator
Water is drawn, drum is entered after being heated by external heater, the water in drum enters evaporator by gravity, to real
Now to the preheating of evaporator and drum, after equipment is preheating to sufficient temp, you can it is passed through heat source, opens the second valve, to
Realize the normal operation of evaporator.
Present embodiment is only to the exemplary description of this patent does not limit its scope of protection, people in the art
Member can also be changed its part, as long as it does not exceed the essence of this patent, within the protection scope of the present patent.
Claims (3)
1. a kind of natural circulation steam generator system, it is characterised in that：Including the first valve (1), supply line (2), drum
(3), first circulation pipe (4), evaporator (5), second circulation pipe (8), water circulating pump (9) and external heater (10)；
One end of the supply line (2) is connected by the first valve (1) with water source, the entrance phase of the other end and drum (3)
It is connected to, first circulation pipeline (4) is installed, evaporator (5) is mounted on first circulation pipeline (4), and evaporator on drum (3)
(5) be connected with supply line (2) by second circulation pipe (8), be provided on second circulation pipeline (8) water circulating pump (9) and
External heater (10).
2. a kind of natural circulation steam generator system according to claim 1, it is characterised in that：On the drum (3)
It is also equipped with the second valve (11), the second valve (11) connects work device by output pipe.
3. pre-heating mean outside the evaporator based on a kind of natural circulation steam generator system described in claim 2, special
Sign is, includes the following steps：
Step 1 starts the first valve (1), and water supply enters drum (3) by supply line (2), is established in drum (3) certain
The first valve (1) and the second valve (11) are closed after water level；
Step 2, ON cycle water pump (9) and external heater (10) enter water supply after the water heating in second circulation pipe (8)
Pipeline (2), enters drum (3) using supply line (2), then passes through first circulation pipe (4) and enters evaporator (5), finally
Second circulation pipe (8) is returned to, finally realizes that the water in evaporator (5) and drum (3) all preheats, system pressure gradually rises,
Water in evaporator (5) is in saturation state always, and water temperature reaches the temperature for needing to preheat, and closes water circulating pump；
Heat source is passed through evaporator (5) by step 3, by adjusting the aperture of the first valve (1) and the second valve (11), makes drum
Interior (3) pressure and water level are in desired value always, finally realize the Natural Circulation between evaporator (5) and drum (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609131.8A CN108758601A (en) | 2018-06-13 | 2018-06-13 | Pre-heating mean outside a kind of natural circulation steam generator system and evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609131.8A CN108758601A (en) | 2018-06-13 | 2018-06-13 | Pre-heating mean outside a kind of natural circulation steam generator system and evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108758601A true CN108758601A (en) | 2018-11-06 |
Family
ID=64022736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810609131.8A Pending CN108758601A (en) | 2018-06-13 | 2018-06-13 | Pre-heating mean outside a kind of natural circulation steam generator system and evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108758601A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707121A (en) * | 2020-07-01 | 2020-09-25 | 王军 | Industrial heat exchanger |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113813A (en) * | 2006-06-07 | 2008-01-30 | 巴布考克及威尔考克斯公司 | Circulation system for sliding pressure steam generator |
| CN101979917A (en) * | 2010-11-09 | 2011-02-23 | 清华大学 | Natural circulating steam injection boiler fed with high salt-containing softened water and water circulating method |
| CN102777876A (en) * | 2012-07-27 | 2012-11-14 | 江苏科技大学 | Exhaust gas waste heat steam producing system of marine diesel generating set |
| US20140262257A1 (en) * | 2013-03-14 | 2014-09-18 | Babcock & Wilcox Power Generation Group, Inc. | Small supercritical once-thru steam generator |
| CN104879743A (en) * | 2015-05-22 | 2015-09-02 | 中国神华能源股份有限公司 | Boiler thermodynamic system and boiler |
| CN206176325U (en) * | 2016-11-09 | 2017-05-17 | 东方电气集团东方锅炉股份有限公司 | A steam generation system for solar photothermal power |
-
2018
- 2018-06-13 CN CN201810609131.8A patent/CN108758601A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113813A (en) * | 2006-06-07 | 2008-01-30 | 巴布考克及威尔考克斯公司 | Circulation system for sliding pressure steam generator |
| CN101979917A (en) * | 2010-11-09 | 2011-02-23 | 清华大学 | Natural circulating steam injection boiler fed with high salt-containing softened water and water circulating method |
| CN102777876A (en) * | 2012-07-27 | 2012-11-14 | 江苏科技大学 | Exhaust gas waste heat steam producing system of marine diesel generating set |
| US20140262257A1 (en) * | 2013-03-14 | 2014-09-18 | Babcock & Wilcox Power Generation Group, Inc. | Small supercritical once-thru steam generator |
| CN104879743A (en) * | 2015-05-22 | 2015-09-02 | 中国神华能源股份有限公司 | Boiler thermodynamic system and boiler |
| CN206176325U (en) * | 2016-11-09 | 2017-05-17 | 东方电气集团东方锅炉股份有限公司 | A steam generation system for solar photothermal power |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707121A (en) * | 2020-07-01 | 2020-09-25 | 王军 | Industrial heat exchanger |
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Application publication date: 20181106 |