CN103497785A - Dry-pulverized-coal gasification combined burner - Google Patents
Dry-pulverized-coal gasification combined burner Download PDFInfo
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- CN103497785A CN103497785A CN201310478833.4A CN201310478833A CN103497785A CN 103497785 A CN103497785 A CN 103497785A CN 201310478833 A CN201310478833 A CN 201310478833A CN 103497785 A CN103497785 A CN 103497785A
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Abstract
The invention discloses a dry-pulverized-coal gasification combined burner comprising a pulverized coal burner and an igniting burner. The pulverized coal burner sequentially comprises a first water-cooling jacket, a pulverized coal channel, a first oxidant channel and an inner barrel from outside to inside. The pulverized coal channel is directly adjacent to the first oxidant channel, and contracts toward the axial direction of the pulverized coal burner, at a position, adjacent to a flame-forward end. The first water-cooling jacket comprises a first water-inflowing channel, a window-type water-cooling groove and a first water-outflowing chanel, and the first water-inflowing channel is communicated with the first water-outflowing channel through the window-type water-cooling groove which is spirally wound at the flame-forward end of the pulverized coal burner. The igniting burner is arranged in the inner barrel and comprises a second water-cooling jacket, a second oxidant channel, a fuel channel, an igniter and a center nitrogen channel. By the arrangement, an ignition process is simplified, and reliability of ignition and operation of pulverized coal is improved; flame diameter is effectively controlled, a membrane water-cooling wall is prevented from being damaged by flames, and reliability of a gasification furnace is improved.
Description
Technical field
The present invention relates to a kind of dry coal powder gasification burner.
Background technology
Gasification refers to sends into reactor to the coal (such as coal dust, coke granule, combustiblematerials powder etc.) through suitably processing as in vapourizing furnace, under the temperature and pressure of certain Coal Gasification Technology technical process, change in some way gas by oxygenant (air or oxygen and steam), obtain synthetic gas (as CO, H
2, H
2o, CO
2deng) process, the synthetic gas generated by gasification can be widely used in various chemical industries.In coal gasification course, burner is a kind of indispensable important component part.
Existing powder coal gasification furnace feeding mode generally has two kinds, and the one, adopt startup burner vapourizing furnace to be heated up (boosting), after reaching certain condition, startup burner is exited, then the coal dust burner starts the coal dust that puts into operation, and starts to carry out gasification reaction; The 2nd, adopt the form of igniter burner and coal dust burner cooperation, first with the igniter burner igniting, boost, after being heated to high temperature, high pressure conditions, vapourizing furnace throws coal with the coal dust burner.
Situation about moving by existing apparatus, adopt the normal pressure igniting in the first sparking mode, rely on igniting, startup burner that vapourizing furnace is heated up, boosts, and after the coal dust burner is lighted, igniting and startup burner will exit from vapourizing furnace.In ignition process, igniter burner and startup burner are specific installation, also must be equipped with servo control mechanism, thus huge structure, complicated operation, startup burner easily breaks down; Particularly importantly, when the coal dust burner is jumped car for some reason, the necessary blowing out of vapourizing furnace, cooling, displacement, then igniting again, expend a large amount of human and material resources, financial resources.The second sparking mode can be at low pressure condition down-firing, and heats up, boosts, and after reaching certain condition, the coal dust burner can put into operation; After the coal dust burner is jumped car, igniter burner, can be after system be repaired still in operation, and therefore the coal dust burner that continues to put into operation has certain advance.But, from current operating performance, also have some problems.The first problem is the easy scaling loss of igniter burner, igniter burner adopts isolating high-pressure ignitor at present simultaneously, Ignition Stability, repeatable poor, ignition energy lower (2J left and right), not water-fast, resistant not, can cause to delay to light gas and even can not light the situation of gas.The second problem is near igniter burner shower nozzle end face due to point of ignition, flame is adherent, long-play easily causes scaling loss, therefore the outside end of igniter burner need to arrange water-cooling jacket, the igniter burner for example had need to arrange 3 layers of water-cooling jacket from outside to inside, and middle water-cooling jacket is arranged between the coal dust passage and oxidant channel of igniter burner.Like this, will leave certain distance between coal dust passage and oxidant channel, the oxygenant flowed out from oxidant channel (for example oxygen) need to just likely meet and burn toward last segment distance in the end from igniter burner with the coal dust flowed out from the coal dust passage.Because entering the vapourizing furnace rear space, amplifies rapidly by oxygenant, cause the flow velocity of oxygenant to be decayed rapidly, the kinetic energy that oxygenant passes to coal dust when oxygenant and coal dust meet also descends rapidly, cause the mixture flow kinetic energy of oxygenant and coal dust not enough and than disperse, uncontrollable flame diameter, the thermal-flame produced after burning easily washes away the burner hearth wall, or too near the burner hearth wall, causes the too high and scaling loss membrane wall of burner hearth wall thermal load.
In addition, in order to monitor the flame situation in vapourizing furnace, generally can flame detector system be set by the center channel of nitrogen of igniter burner, but due to burner end region temperature higher (normal temps in the gasifier operation process is 1450-1650 ℃), generally do not have camera can bear this temperature, therefore whether current flame detector system only can be to having flame to be detected, and can't the flame detection temperature, more can't observe flame image.In the gasifier operation process, can't judge that loss of ignition is that problem, instrument occurred electric lighter for ignition fire can't detect flame or processing medium is defective causes.
Summary of the invention
The objective of the invention is igniter burner and coal dust burner are optimized to combination, thereby provide a kind of novel dry coal powder gasification assembled nozzle, without burner is repeatedly inserted or extracts, overcome the problem of uncontrollable combustion flame diameter and consequent easy scaling loss membrane wall simultaneously.
For achieving the above object, the present invention has taked following technical scheme:
The invention provides a kind of dry coal powder gasification assembled nozzle, comprise coal dust burner and igniter burner.Described coal dust burner comprises the first water-cooling jacket, coal dust passage, the first oxidant channel and inner core from outside to inside successively, described coal dust passage and described the first oxidant channel direct neighbor, described coal dust passage is near shrinking to the axis direction of described coal dust burner gradually to the fire end place.Described the first water-cooling jacket comprises the first water entry, window formula cooling trough and the first water exit, described the first water entry is communicated with described the first water exit by described window formula cooling trough, described window formula cooling trough described coal dust burner to the fire end coiled coil.Described igniter burner is located in the inner core of described coal dust burner, described igniter burner comprises the second water-cooling jacket, the second oxidant channel, fuel channel and center channel of nitrogen from outside to inside successively, near being in to fire end between described fuel channel and described center channel of nitrogen, is being provided with lighter for ignition.
Preferably, described window formula cooling trough coiled coil 3,4 or 5 circles.
Preferably, described the first oxidant channel also is provided with swirl vane close to the fire end place, make oxygenant possess the air-flow condition of high speed, high eddy flow when described the first oxidant channel flows out, thereby can when mixing with coal dust, to it, be dragged draw, shearing and atomization, coal dust is mixed more full and uniform with oxygenant.
Preferably, described coal dust passage comprises discharge passage and coal powder entrance passage, and described discharge passage is located to fire end, and described coal powder entrance passage is located at back of the body fire end, and described coal powder entrance passage communicates with described discharge passage by coupling end.Further preferably, described coal powder entrance passage is 3,4 or 5, and along circumferentially being uniformly distributed of described coal dust burner, for example, when described coal powder entrance passage is 3, these 3 coal powder entrance passages are 120 ° each other.Certainly, described discharge passage and coal powder entrance passage are structure as a whole also passable, and described coal dust passage totally is cylinder shape.
Preferably, described discharge passage is shrinking gradually to fire end, the inwall of described discharge passage is 15 °～40 ° at the angle of the axis to fire end and described coal dust burner, more preferably 20 °～35 °, for example 22 °, 27 °, 30 ° or 33 °, make coal dust can mix with the oxygenant flowed out from described the first oxidant channel rapidly out from described discharge passage, thereby coal dust can obtain more kinetic energy from oxygenant and turbulence is stronger.
Preferably, described lighter for ignition is the lighter for ignition of ignition energy more than the 30J high energy igniter of energy storage equipment (with), described lighter for ignition be hollow structure and be enclosed within described center channel of nitrogen to fire end, due to the ignition energy of described high energy igniter apparently higher than the isolating high-pressure ignitor (2J left and right) adopted in traditional igniter burner, guaranteed lighter for ignition stable ignition in low temperature, humidity, contamination environment, the structure of hollow can guarantee that again nitrogen passes from the lighter for ignition center simultaneously.
Preferably, described dry coal powder gasification assembled nozzle also comprises for monitoring the flame detector system of flame combustion case, described flame detector system is arranged on assembled nozzle back of the body fire end, and described flame detector system comprises for detection of the flame detector of flame and imaging combustion and temp measuring system for flame video and flame temperature are provided.Further preferably, be provided with isolation window between described flame detector system and described center channel of nitrogen.
Dry coal powder gasification assembled nozzle of the present invention unites two into one coal dust burner and igniter burner, make simple to operate, degree of mixing and the turbulence kinetic energy of coal dust and oxygenant have been improved, effectively controlled flame diameter, avoid the situation of scaling loss membrane wall, improved the reliability and security of vapourizing furnace.
The accompanying drawing explanation
The sectional view that Fig. 1 is dry coal powder gasification assembled nozzle of the present invention;
The enlarged view that Fig. 2 is the igniter burner shown in Fig. 1;
The effect explanatory view that Fig. 3 is dry coal powder gasification assembled nozzle operation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, a preferred embodiment of the present invention is described in detail.
As shown in Figure 1, dry coal powder gasification assembled nozzle of the present invention comprises coal dust burner 1 and igniter burner 2.Coal dust burner 1 main body is tubular, ecto-entad comprises the first water-cooling jacket, coal dust passage, the first oxygen channel 7 and inner core successively, wherein the first water-cooling jacket comprises the first water entry 3, the first water exit 4 and window formula cooling trough 5, the first water entry 3 is communicated with the first water exit 4 by window formula cooling trough 5, and window formula cooling trough 5 encloses to fire end coiled coil 4 coal dust burner 1.Described coal dust passage is from comprising respectively discharge passage 9 and 3 coal powder entrance passages 6 to fire end to back of the body fire end, 3 coal powder entrance passages 6 circumferentially being uniformly distributed along coal dust burner 1, be each other 120 °, discharge passage 9 is the circular channel with coal dust burner 1 coaxial line, but discharge passage 9, near shrinking to axis direction gradually to fire end place inwall, is 25 ° (being the α angle in Fig. 1) with the axis of coal dust burner 1.Coal powder entrance passage 6 communicates with discharge passage 9 by coupling end 8.The tubular that the first water entry 3, the first water exit 4, the first oxygen channel 7 and discharge passage 9 main bodys circularize.The first oxygen channel 7 and coal dust passage direct neighbor, i.e. the two middle water-cooling jacket that there is no cooling use.The first oxygen channel 7 near to the fire end place, being provided with swirl vane 11, in the first oxygen channel 7 mobile oxygen just having possessed after swirl vane 11 at a high speed, the air-flow condition of high eddy flow.Igniter burner 2 inserts in the inner core of coal dust burner 1.
The structure of igniter burner 2 is shown in Fig. 2, comprise successively from outside to inside the second water entry 21, the second water exit 22, the second oxygen channel 23, fuel channel 24He center channel of nitrogen 25, be provided with high energy igniter 26, the second water entrys 21 and second water exit 22 formation the second water-cooling jackets near being in to fire end between fuel channel 24He center channel of nitrogen 25.The second water entry 21, the second water exit 22, the second oxygen channel 23 and the ringwise tubular of fuel channel 24 main body.High energy igniter 26 is with energy storage equipment, and ignition energy can reach 30J or higher, is hollow structure, and center channel of nitrogen 25 is communicated with vapourizing furnace through the hollow channel of high energy igniter 26.The liquefied petroleum gas (LPG) of the oxygen flowed out from the second oxygen channel 23 and outflow from fuel channel 24 is in the exit of igniter burner 2 enhancing mixed, by high energy igniter 26 igniting, ignited, thereby start vapourizing furnace is carried out to increasing temperature and pressure, liquefied petroleum gas (LPG) is replaced by the high-pressure gas that methanol device draws when running status.
Between the first water entry 3 and the first water exit 4, by window formula cooling trough 5, be communicated with; when cooling-water flowing during through the window formula cooling trough 5 of coiled coil; by high-speed screw, flow; but the water coolant attenuate even destroys the side towards the fire laminar sub-layer of turbulent flows; improve heat transfer effect; effectively protecting the burner side towards the fire, improve work-ing life and the continuous operating time of assembled nozzle, is that the vapourizing furnace long-period stable operation is created prerequisite.Adopt the cooled side towards the fire temperature of this mode only than the high 100-150 ℃ of temperature of cooling water.Also just because of the outstanding cooling performance of window formula cooling trough, assembled nozzle of the present invention only need to arrange respectively a water-cooling jacket in coal dust burner 1 and igniter burner 2 just can realize enough cooling performances, between the first oxygen channel 7 and coal dust passage, a water-cooling jacket needn't additionally be set again thus, thereby make from discharge passage 9 and the first oxygen channel 7 closely closely, the coal dust jet flowed out from the two can mix in exit immediately with oxygen jet.
In normal productive process, for preventing 1 fray-out of flame of coal dust burner, igniter burner 2 needs to keep operation continuously.Coal dust to be gasified is delivered into by 3 coal powder entrance passages 6 in the discharge passage 9 of annular cylinder shape and carries out from mixed, then the wall along the discharge passage 9 shunk to the axis direction of coal dust burner 1 gradually flow to the oral area of coal dust burner 1 high speed flowed out with the first oxygen channel 7, the oxygen of high eddy flow fully mixes immediately, now oxygen kinetic energy attenuation degree is lower, the coal dust jet is dragged and is drawn by oxygen jet thus, shear and atomization, as shown in Figure 3, can either guarantee that the coal dust jet possesses enough spinning momentums, effectively controlled again coal dust jet rotary diameter D1, guarantee that D1 is less than the diameter D2 of burner hearth 12, improving constantly efficiency of carbon conversion, reach on the basis of required temperature of combustion, effectively protected the burner hearth wall, avoided membrane wall to be burnt, improved the safety and reliability of vapourizing furnace.
Simultaneously; the dry coal powder gasification assembled nozzle also comprises integral flame checking system 30; integral flame checking system 30 is arranged on igniter burner afterbody (carrying on the back fire end); by withstand voltage glass lens 29, integral flame checking system and center channel of nitrogen are kept apart, thereby effectively protect flame detector system.Integral flame checking system 30 is based on the Planck principle of energy, adopts the method for double-colored thermometric and flame intensity coupling to carry out thermometric.Integral flame checking system 30 carries out separating treatment by the flame spectrum signal to collecting on glass lens 29, one road optical signal to flame detector 27 for flame detection signal (switching value is for interlocking, and analog quantity is for showing flame intensity) is provided; One road optical signal to imaging combustion and temp measuring system 28 for flame video and flame temperature are provided.Finally these three kinds of flame information integrations are transferred to Controlling System, for the normal steady running of vapourizing furnace provides a kind of real-time monitoring equipment.
Above-described embodiment is used for illustrative purposes only; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also should belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (10)
1. a dry coal powder gasification assembled nozzle, is characterized in that, described dry coal powder gasification assembled nozzle comprises coal dust burner and igniter burner;
Described coal dust burner comprises the first water-cooling jacket, coal dust passage, the first oxidant channel and inner core from outside to inside successively, described coal dust passage and described the first oxidant channel direct neighbor, described coal dust passage is near shrinking to the axis direction of described coal dust burner gradually to the fire end place;
Described the first water-cooling jacket comprises the first water entry, window formula cooling trough and the first water exit, described the first water entry is communicated with described the first water exit by described window formula cooling trough, described window formula cooling trough described coal dust burner to the fire end coiled coil;
Described igniter burner is located in the inner core of described coal dust burner, described igniter burner comprises the second water-cooling jacket, the second oxidant channel, fuel channel and center channel of nitrogen from outside to inside successively, near being in to fire end between described fuel channel and described center channel of nitrogen, is being provided with lighter for ignition.
2. dry coal powder gasification assembled nozzle according to claim 1, is characterized in that, described window formula cooling trough coiled coil 3,4 or 5 circles.
3. dry coal powder gasification assembled nozzle according to claim 1, is characterized in that, described the first oxidant channel also is provided with swirl vane close to the fire end place.
4. dry coal powder gasification assembled nozzle according to claim 1, it is characterized in that, described coal dust passage comprises discharge passage and coal powder entrance passage, described discharge passage is located to fire end, described coal powder entrance passage is located at back of the body fire end, and described coal powder entrance passage communicates with described discharge passage by coupling end.
5. dry coal powder gasification assembled nozzle according to claim 4, is characterized in that, described coal powder entrance passage is 3,4 or 5, along circumferentially being uniformly distributed of described coal dust burner.
6. according to the described dry coal powder gasification assembled nozzle of claim 4 or 5, it is characterized in that, described discharge passage is shrinking gradually to fire end, and the inwall of described discharge passage is 15 °～40 ° at the angle of the axis to fire end and described coal dust burner.
7. dry coal powder gasification assembled nozzle according to claim 6, is characterized in that, the inwall of described discharge passage is 20 °～35 ° at the angle of the axis to fire end and described coal dust burner.
8. dry coal powder gasification assembled nozzle according to claim 1, is characterized in that, described lighter for ignition is the lighter for ignition of ignition energy more than 30J, described lighter for ignition be hollow structure and be enclosed within described center channel of nitrogen to fire end.
9. dry coal powder gasification assembled nozzle according to claim 1, it is characterized in that, also comprise for monitoring the flame detector system of flame combustion case, described flame detector system is arranged on assembled nozzle back of the body fire end, and described flame detector system comprises for detection of the flame detector of flame and imaging combustion and temp measuring system for flame video and flame temperature are provided.
10. dry coal powder gasification assembled nozzle according to claim 9, is characterized in that, between described flame detector system and described center channel of nitrogen, is provided with isolation window.
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| CN201310478833.4A CN103497785B (en) | 2013-10-14 | 2013-10-14 | Dry-pulverized-coal gasification combined burner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834444A (en) * | 2014-03-13 | 2014-06-04 | 杜建吉 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| CN103937554A (en) * | 2014-04-02 | 2014-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Nozzle for increasing carbon conversion rate of pulverized coal entrained-bed gasifier |
| CN104974797A (en) * | 2015-07-07 | 2015-10-14 | 杭州全合科技有限公司 | Multifunctional coal gasification burner for two-stage type dry coal powder entrained flow gasification furnace |
| CN105090944A (en) * | 2015-07-08 | 2015-11-25 | 安徽科达洁能股份有限公司 | Burner, entrained-flow gasifier and combustion method of entrained-flow gasifier |
| CN105820843A (en) * | 2016-03-31 | 2016-08-03 | 华电重工股份有限公司 | Method for co-combusting dry-distilled crude gas or hydrogen production desorption gas thereof and semicoke |
| CN108048610A (en) * | 2018-01-10 | 2018-05-18 | 航天长征化学工程股份有限公司 | Burner combination device and method for directly gasifying reduced iron |
| WO2018188211A1 (en) * | 2017-04-14 | 2018-10-18 | 航天长征化学工程股份有限公司 | Gasification burner |
| CN109185876A (en) * | 2018-10-25 | 2019-01-11 | 中国船舶重工集团公司第七研究所 | The cooling jacket with heat exchange fin for coal gasification burner |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834444A (en) * | 2014-03-13 | 2014-06-04 | 杜建吉 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| CN103834444B (en) * | 2014-03-13 | 2015-07-15 | 济南同智创新能源科技股份有限公司 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| CN103937554A (en) * | 2014-04-02 | 2014-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Nozzle for increasing carbon conversion rate of pulverized coal entrained-bed gasifier |
| CN104974797A (en) * | 2015-07-07 | 2015-10-14 | 杭州全合科技有限公司 | Multifunctional coal gasification burner for two-stage type dry coal powder entrained flow gasification furnace |
| CN104974797B (en) * | 2015-07-07 | 2017-07-11 | 杭州全合科技有限公司 | Multifunctional coal gasification burner for two-period form dry coal powder airflow bed gasification furnace |
| CN105090944A (en) * | 2015-07-08 | 2015-11-25 | 安徽科达洁能股份有限公司 | Burner, entrained-flow gasifier and combustion method of entrained-flow gasifier |
| CN105820843A (en) * | 2016-03-31 | 2016-08-03 | 华电重工股份有限公司 | Method for co-combusting dry-distilled crude gas or hydrogen production desorption gas thereof and semicoke |
| WO2018188211A1 (en) * | 2017-04-14 | 2018-10-18 | 航天长征化学工程股份有限公司 | Gasification burner |
| CN108728168A (en) * | 2017-04-14 | 2018-11-02 | 航天长征化学工程股份有限公司 | Gasification burner |
| US11713427B2 (en) | 2017-04-14 | 2023-08-01 | Changzheng Engineering Co., Ltd. | Gasification burner |
| CN108048610A (en) * | 2018-01-10 | 2018-05-18 | 航天长征化学工程股份有限公司 | Burner combination device and method for directly gasifying reduced iron |
| CN109185876A (en) * | 2018-10-25 | 2019-01-11 | 中国船舶重工集团公司第七研究所 | The cooling jacket with heat exchange fin for coal gasification burner |
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