CN102878578B - Hydrogen igniter for nuclear power station - Google Patents
Hydrogen igniter for nuclear power station Download PDFInfo
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- CN102878578B CN102878578B CN201210359051.4A CN201210359051A CN102878578B CN 102878578 B CN102878578 B CN 102878578B CN 201210359051 A CN201210359051 A CN 201210359051A CN 102878578 B CN102878578 B CN 102878578B
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Abstract
The invention provides a hydrogen igniter for a nuclear power station. The hydrogen igniter comprises a cover board, a graphite gasket, a box body, a stuffing box, a ceramic wiring terminal, an ignition part and a waterproof cover, wherein the ignition part adopts a high-temperature resistance helical coil type heating element or a high-temperature resistance closed type electrothermal plug. In order to adapt to a high-temperature and high-humidity environment, the graphite gasket is arranged between the box body and the cover board and is used for sealing; a bolt hole between the box body and the cover board is a blind hole; a boss is processed around an opening of the front end face of the box body; a groove is formed in a surface, which is perpendicular to the front end face of the box body, of the boss; and the waterproof cover is fixed on the upper surface of the box body, so that water drops can be prevented from sputtering a heating section of the ignition part. The power of the hydrogen igniter is less than 145 W; the temperature of the surface of the heating element is more than 930 DEG C, and the heating element can continuously work for 72 hours; and the hydrogen igniter has the characteristics of high temperature and high humidity resistance, radiation resistance, high starting speed and long service life. If severe accidents such as water failure of the nuclear power station happen, the hydrogen igniter can ignite reliably, and potential hazard of explosion of a large range of high-concentration hydrogen mixed gas is eliminated.
Description
Technical field
Invention relates to a kind of igniter, is specifically related to a kind of used in nuclear power station hydrogen igniter.
Background technology
After nuclear power station generation design basis accident or major accident, owing to there is chemical reaction between zirconium in water vapour and fuel sheath, produce at short notice a large amount of hydrogen.Due to reacting between the RADIATION DECOMPOSITION of water and reactor core fused mass and concrete, also a large amount of hydrogen will be produced in addition.As under major accident condition, more than the generation speed of hydrogen can reach 2Kg/s.If a large amount of hydrogen that produce can not be eliminated fast and effectively, once on a large scale, the hydrogen mixed gas of high concentration blasts, by the integrality of entail dangers to containment.Therefore the U.S., Europe and multiple countries such as Chinese explicitly call for, and must consider the measure that keeps containment integrity under major accident, particularly must consider to estimate the incendiary effect of the various fuel gas that occur.
The hydrogen producing for Accident prevention occurs on a large scale, the blast of high concentration, and people adopt the special equipment such as hydrogen recombiner, hydrogen igniter to carry out hydrogen elimination.But the igniter of hydrogen igniter, only for design basis accident, had the shortcomings such as energy consumption is large, heatproof is low in the past, as the high ambient temperature bearing is no more than 125 DEG C.And adopt at present the nuclear power station that third generation technology is built that once major accident occurs, will in the short time, produce a large amount of hydrogen in containment, environment temperature is up to more than 300 DEG C simultaneously, therefore the hydrogen igniter in the past hydrogen that can not normal ignition disappears.Occur in addition after major accident; the safety means electricity consumption of nuclear power station may rely on reserve battery completely; if adopt traditional hydrogen igniter to eliminate hydrogen, can, because the high-power of itself will consume the valuable electric energy of reserve battery very soon, cause cannot continuing to protect the safety of containment.Therefore the generation Ⅲ nuclear power station that the heating element heater of hydrogen igniter can not meet the construction of employing AP1000 technology is about the instructions for use under major accident condition in the past.
Summary of the invention
In view of this, the invention provides a kind of used in nuclear power station hydrogen igniter, can under hot conditions, realize the hydrogen that disappears of lighting a fire, and good sealing effect, power is low.
Used in nuclear power station hydrogen igniter of the present invention comprises cover plate, Graphite pad, casing, ceramic binding post, ignition part and bucker.In the time that supply voltage is 120V or 220V alternating current, ignition part is selected resistant to elevated temperatures helical coil type heating element heater; In the time that supply voltage is 9～12V power supply, ignition part is selected resistant to elevated temperatures enclosed type glow plug.
Described casing is the square structure of uncovered, and casing adopts resistant to elevated temperatures stainless steel material.The opening surface that makes casing is front end face, uses when igniter, and high temperature-resistant cable, through being fixed on the bottom surface of casing or the stuffing-box of side enters in casing, is connected with the ceramic binding post that is fixed on interior.
Ignition part is fixed on the top of casing right flank, and the heating section of ignition part, through wallboards of box body, is positioned at outside casing.In the time that ignition part is resistant to elevated temperatures helical coil type heating element heater, heating element heater is directly fixed on casing; In the time that ignition part is resistant to elevated temperatures enclosed type glow plug, glow plug is fixed on casing by resistant to elevated temperatures protective casing.The skin of this protective casing is stainless steel, inner suit porcelain bushing.The wire connecting screw rod of ignition part is by being connected with ceramic binding post with the wire of ceramic ring protection.
The area of described casing front end face institute opening is less than the area of casing front end face, and is processed with boss along the surrounding of opening, on the boss face vertical with casing front end face, is processed with groove.Cover plate is bolted on the front end face of casing, between casing and cover plate, adopts Graphite pad to seal, in order to prevent that extraneous steam from entering in casing, is processed as blind hole by the bolt hole between casing and cover plate.
The upper surface of casing is fixed with bucker, and the length that bucker right-hand member stretches out casing part is greater than the length that the heating section of ignition part is stretched out casing.The level height of bucker front end is greater than the level height of its rear end, and after shower water is spread across on bucker, water flows to casing back, splashes in the heating section of ignition part thereby avoid water to enter box house and drip.
In order to protect the heating section of ignition part, be set with protective cover in its heating section outside, the size of the size of protective cover and ignition part heating section matches, and that protective cover can adopt is netted, paliform, semicircle shape etc.
Rear end face and bottom surface at casing are all processed with Connection Block, are convenient to the fixing and installation of igniter under different environments for use.
Excircle at described ignition part wire connecting screw rod terminals adopts resistant to elevated temperatures sealing device; Resistant to elevated temperatures sealing device comprises sealing ring, ceramic ring A, cutting ferrule and ceramic ring B, and sealing ring and cutting ferrule all adopt exotic material to make, and cutting ferrule is olive shape, and its annexation is: cutting ferrule is arranged between ceramic ring A and ceramic ring B; The terminals of wire connecting screw rod are successively through ceramic ring A, cutting ferrule and ceramic ring B, and the excircle of ceramic ring B contacts with ignition part shell inner surface; Between ceramic ring A and ignition part shell inner surface, sealing ring is installed, sealing ring contacts with ignition part shell inner surface; Ceramic ring A is processed with the side that is connected of cutting ferrule the groove matching with cutting ferrule profile, is processed with the groove matching with cutting ferrule profile at ceramic ring B with the side that is connected of cutting ferrule.
Operation principle of the present invention is: while using igniter, one end of cable is entered in casing and is connected with the ceramic binding post that is fixed on interior through stuffing-box, another termination power of cable.The wire connecting screw rod of ignition part is connected with ceramic binding post by wire.In the time that nuclear power station has an accident, start hydrogen igniter, after energising, the heating section temperature of heater block rises to rapidly firing temperature, if now there is flammable hydrogen mixed gas to be diffused into heating section surface, will there is burning among a small circle in hydrogen mixed gas, thereby eliminate fast hydrogen.
Beneficial effect:
(1) igniter of the present invention has the advantages that high-temp resisting high-humidity resisting, radioresistance, startup are fast, the life-span is long, after nuclear power station generation loss of-coolant accident (LOCA) or major accident, can light a fire reliably, elimination occurs on a large scale, high concentration hydrogen gaseous mixture explodes the hidden danger of bringing.
(2) in order to ensure reliability and the heat-resisting quantity of box sealing, between casing and cover plate, adopt Graphite pad to seal, ensure that casing still has good sealing effectiveness in hot environment.
(3) bolt hole end cap being connected with casing is processed as blind hole, can further improve sealing property, prevents that extraneous steam from entering in casing.
(4) be processed with groove at the openend of casing, in the time having a small amount of steam to enter along the junction of cover plate and casing, can collect in groove, and can not enter box house, further improve sealing property.
(5) level height of the front end of bucker is greater than the level height of its rear end, can effectively protect glow plug not by shower water splash.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the side sectional view of casing.
Wherein, 1-cover plate, 2-Graphite pad, 3-pottery binding post, 4-casing, 5-ignition part, 6-bucker, 7-boss, 8-groove.
Detailed description of the invention
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
The present embodiment provides a kind of resistant to elevated temperatures igniter, and this igniter can meet the generation Ⅲ nuclear power that adopts AP1000 technology to build and stand in high temperature resistant under major accident condition and lower powered instructions for use, and starts reliably.
As shown in Figure 1, the square structure that casing 4 is the uncovered that adopts resistant to elevated temperatures stainless steel material and make, the opening surface that makes casing is front end face.Be processed with 4 fixing holes at the back of casing 4, bottom surface each side have 2 fixing lower margins, be convenient to the installation of casing 4 under the multiple condition such as metope, ground and fix.
The area of casing 4 front end face institute openings is less than the area of casing 4 front end faces, and is processed with boss 7 along the surrounding of opening, on boss 7 face vertical with casing 4 front end faces, is processed with groove 8.Cover plate 1 is bolted on the front end face of casing 4, between casing 4 and cover plate 1, adopts Graphite pad to seal, and the bolt hole between casing 4 and cover plate 1 is processed as to blind hole.
One end of high temperature-resistant cable enters casing 4 by the stuffing-box that is fixed on casing 4 bottoms, and is connected with the ceramic binding post 3 in casing 4, when use, and the other end of cable and power connection.
Ignition part 5 in the present embodiment is resistant to elevated temperatures enclosed type glow plug, and this high temperature resistant type glow plug comprises sheath, heater, insulating materials, housing, wire connecting screw rod, binding post, sealing ring, ceramic ring A, cutting ferrule, ceramic ring B, jacking nut and clamp nut.Wherein sheath, cutting ferrule, binding post and sealing ring all adopt exotic material to make.Sheath is the column construction of hollow, one end opening, other end sealing; Ceramic ring A and ceramic ring B are taper pylon, and the excircle dimension of ceramic ring A is less than the excircle dimension of ceramic ring B, and cutting ferrule is olive shape.Its annexation is: heater and wire connecting screw rod are installed in sheath, and wherein one end of heater is connected with sheath blind end, and the other end is connected with wire connecting screw rod, and the other end of wire connecting screw rod stretches out the openend of sheath; The axis of wire connecting screw rod and the dead in line of sheath, heater is positioned on the axis of sheath; In the space of sheath, be pressed into the insulating materials of powdery.At sheath outside suit housing, jacket outer surface contacts with shell inner surface, and the blind end of sheath stretches out housing; In sheath openend place side, be processed with bellmouth along housing end face face, the large end of described bellmouth is positioned at housing end face, and the taper of ceramic ring A, ceramic ring B is all consistent with the taper of this bellmouth.The end of sheath openend is positioned at this taper sky, and wire connecting screw rod stretches out housing; In the bellmouth of housing, be pressed into insulating materials, make sheath be positioned at the centre position of housing, the end face of insulating materials is concordant with the end face of sheath openend.On wire connecting screw rod in bellmouth, be set with successively ceramic ring A, cutting ferrule and ceramic ring B, one end of ceramic ring A contacts with the end of sheath openend, and the other end contacts with cutting ferrule, and the other end of cutting ferrule contacts with ceramic ring B.On ceramic ring A, be processed with the junction of cutting ferrule the groove matching with cutting ferrule profile; On ceramic ring B, be processed with the junction of cutting ferrule the groove matching with cutting ferrule profile; Gapped between ceramic ring A and shell inner surface, ceramic ring B contacts with shell inner surface.Between ceramic ring A and shell inner surface, cone-shaped sealing ring is installed, the taper of sealing ring is consistent with the taper of bellmouth; On the excircle of place, the upper conical hole of housing end, be processed with screw thread, for jacking nut is installed; The part that wire connecting screw rod stretches out jacking nut is processed with screw thread, for collet threaded is installed.In order to prevent that jacking nut from contacting with clamp nut, on ceramic ring B, the position of conducting wire connecting screw rod is processed with projection; On the excircle of housing, be processed with binding post.
Glow plug is fixed on the top of casing 4 right flanks by resistant to elevated temperatures protective casing, the heating section of glow plug is positioned at outside casing 4 through casing 4 wallboards.The skin of the protective casing of fixing glow plug is stainless steel, inner suit porcelain bushing.The wire connecting screw rod of glow plug is by being connected with ceramic binding post with the wire of ceramic ring protection.Described glow plug heating section outside is set with protective cover, and the size of the size of protective cover and ignition part heating section matches, the shapes such as that protective cover can adopt is netted, paliform, semicircle shape.
Be fixed with bucker 6 at the upper surface of casing 4, the length that bucker 6 right-hand members stretch out casing 4 parts is greater than the length that the heating section of glow plug is stretched out casing 4, and the level height of the front end of bucker 6 is greater than the level height of its rear end.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a used in nuclear power station hydrogen igniter, it is characterized in that, comprise cover plate (1), Graphite pad (2), ceramic binding post (3), casing (4) and ignition part (5), the uncovered square structure that described casing (4) is made for resistant to elevated temperatures stainless steel material; The opening surface that makes casing (4) is front end face, high temperature-resistant cable, through being fixed on the bottom surface of casing (4) or the stuffing-box of side enters in casing (4), is connected with the ceramic binding post (3) that is fixed on casing (4) inner surface; Ignition part (5) is fixed on the top of casing (4) right flank, and the heating section of ignition part (5), through casing (4) wallboard, is positioned at outside casing (4); The wire connecting screw rod of ignition part (5) is by being connected with ceramic binding post (3) with the wire of ceramic ring protection;
The area of described casing (4) front end face institute opening is less than the area of casing (4) front end face, and be processed with boss (7) along the surrounding of opening, on boss (7) face vertical with casing (4) front end face, be processed with groove (8);
Described cover plate (1) is bolted on the front end face of casing (4), and the bolt hole between casing (4) and cover plate (1) is blind hole; Between casing (4) and cover plate (1), adopt Graphite pad (2) to seal;
Terminals at described ignition part (5) wire connecting screw rod adopt resistant to elevated temperatures sealing device;
Rear end face and the bottom surface of described casing (4) are all processed with fixed connecting base.
2. a kind of used in nuclear power station hydrogen igniter as claimed in claim 1, is characterized in that; Described resistant to elevated temperatures sealing device comprises sealing ring, ceramic ring A, cutting ferrule and ceramic ring B, and sealing ring and cutting ferrule all adopt exotic material to make, and cutting ferrule is olive shape, and its annexation is: cutting ferrule is arranged between ceramic ring A and ceramic ring B; The terminals of wire connecting screw rod are successively through ceramic ring A, cutting ferrule and ceramic ring B, and the excircle of ceramic ring B contacts with ignition part (5) shell inner surface; Between ceramic ring A and ignition part (5) shell inner surface, sealing ring is installed, sealing ring contacts with ignition part (5) shell inner surface; Ceramic ring A is processed with the side that is connected of cutting ferrule the groove matching with cutting ferrule profile, is processed with the groove matching with cutting ferrule profile at ceramic ring B with the side that is connected of cutting ferrule.
3. a kind of used in nuclear power station hydrogen igniter as claimed in claim 1, it is characterized in that, this device further comprises bucker (6), described bucker (6) is fixed on the upper surface of casing (4), and the heating section that the length that bucker (6) right-hand member stretches out casing (4) part is greater than ignition part (5) is stretched out the length of casing (4).
4. a kind of used in nuclear power station hydrogen igniter as claimed in claim 3, is characterized in that, the level height of described bucker (6) front end is greater than the level height of its rear end.
5. a kind of used in nuclear power station hydrogen igniter as claimed in claim 1, is characterized in that, in the time that supply voltage is the alternating current of 120V or 220V, described ignition part (5) is resistant to elevated temperatures helical coil type heating element heater; In the time that supply voltage is 9～12V power supply, described ignition part (5) is resistant to elevated temperatures enclosed type glow plug.
6. a kind of used in nuclear power station hydrogen igniter as claimed in claim 5, is characterized in that, described resistant to elevated temperatures helical coil type heating element heater is directly fixed on casing (4).
7. a kind of used in nuclear power station hydrogen igniter as claimed in claim 5, is characterized in that, described glow plug is fixed on casing (4) by resistant to elevated temperatures protective casing.
8. a kind of used in nuclear power station hydrogen igniter as claimed in claim 7, is characterized in that, the skin of described protective casing is stainless steel, inner suit porcelain bushing.
9. a kind of used in nuclear power station hydrogen igniter as claimed in claim 1, is characterized in that, further comprises protective cover, and described protective cover is sleeved on its heating section outside, and the size of the size of protective cover and ignition part (5) heating section matches.
10. a kind of used in nuclear power station hydrogen igniter as claimed in claim 9, is characterized in that, described protective cover is netted, paliform or semicircle shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359051.4A CN102878578B (en) | 2012-09-25 | 2012-09-25 | Hydrogen igniter for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359051.4A CN102878578B (en) | 2012-09-25 | 2012-09-25 | Hydrogen igniter for nuclear power station |
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| CN102878578A CN102878578A (en) | 2013-01-16 |
| CN102878578B true CN102878578B (en) | 2014-12-03 |
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| CN201210359051.4A Active CN102878578B (en) | 2012-09-25 | 2012-09-25 | Hydrogen igniter for nuclear power station |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ306801B6 (en) * | 2016-05-18 | 2017-07-12 | Elexim, a.s. | A hermetic switchboard cabinet for nuclear power plants |
| CN114905480A (en) * | 2021-02-09 | 2022-08-16 | 京东科技信息技术有限公司 | Rail-mounted robot |
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| US5108696A (en) * | 1988-05-17 | 1992-04-28 | Siemens Aktiengesellschaft | Device for controlled combustion of an ignitable hydrogen/air mixture in a nuclear power plant |
| US5592521A (en) * | 1991-07-29 | 1997-01-07 | Siemens Aktiengesellschaft | Process and device for recombining and/or igniting hydrogen contained in an H2 -air-steam mixture, preferably for nuclear power stations |
| US6385270B1 (en) * | 1997-05-27 | 2002-05-07 | Siemens Aktiengellschaft | Safety vessel of a nuclear facility having an ignition system for the recombination of hydrogen in a gas mixture |
| CN1892922A (en) * | 2005-06-30 | 2007-01-10 | 株式会社东芝 | Reactor containment shell and boiling water reactor power plant |
| CN102208216A (en) * | 2011-05-18 | 2011-10-05 | 华北电力大学 | Hydrogen-explosion-preventing serious nuclear accident relieving device and method |
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2012
- 2012-09-25 CN CN201210359051.4A patent/CN102878578B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5108696A (en) * | 1988-05-17 | 1992-04-28 | Siemens Aktiengesellschaft | Device for controlled combustion of an ignitable hydrogen/air mixture in a nuclear power plant |
| US5592521A (en) * | 1991-07-29 | 1997-01-07 | Siemens Aktiengesellschaft | Process and device for recombining and/or igniting hydrogen contained in an H2 -air-steam mixture, preferably for nuclear power stations |
| US6385270B1 (en) * | 1997-05-27 | 2002-05-07 | Siemens Aktiengellschaft | Safety vessel of a nuclear facility having an ignition system for the recombination of hydrogen in a gas mixture |
| CN1892922A (en) * | 2005-06-30 | 2007-01-10 | 株式会社东芝 | Reactor containment shell and boiling water reactor power plant |
| CN102208216A (en) * | 2011-05-18 | 2011-10-05 | 华北电力大学 | Hydrogen-explosion-preventing serious nuclear accident relieving device and method |
Non-Patent Citations (4)
| Title |
|---|
| Hydrogen reduction following severe accidents using the dual recombiner-igniter concept;R. Heck等;《Nuclear Engineering and Design》;19950831;第157卷(第3期);311-319 * |
| R. Heck等.Hydrogen reduction following severe accidents using the dual recombiner-igniter concept.《Nuclear Engineering and Design》.1995,第157卷(第3期),311-319. * |
| 冯海波.核电站用氢点火器.《舰船科学技术》.2010,第32卷(第12期),34-37. * |
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Address after: 056027 No. 17, Exhibition Road, Handan, Hebei Patentee after: 718th Research Institute of China Shipbuilding Corp. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 056027 No. 17, Exhibition Road, Handan, Hebei Patentee before: Handan Purifying Equipment Research Institute Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE |
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