CN203569048U - Dry powder coal gasifying combined burner - Google Patents

Dry powder coal gasifying combined burner Download PDF

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Publication number
CN203569048U
CN203569048U CN201320632899.XU CN201320632899U CN203569048U CN 203569048 U CN203569048 U CN 203569048U CN 201320632899 U CN201320632899 U CN 201320632899U CN 203569048 U CN203569048 U CN 203569048U
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CN
China
Prior art keywords
burner
channel
fire
coal dust
water
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CN201320632899.XU
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Chinese (zh)
Inventor
焦洪桥
郭伟
罗春桃
井云环
黄斌
雍晓静
侯茂林
杨磊
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神华集团有限责任公司
神华宁夏煤业集团有限责任公司
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Priority to CN201320632899.XU priority Critical patent/CN203569048U/en
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Abstract

The utility model discloses a dry powder coal gasifying combined burner. The dry powder coal gasifying combined burner comprises a powder coal burner and an ignition burner, wherein the powder coal burner sequentially comprises a first water cooling jacket, a powder coal channel, a first oxidant channel and an inner cylinder from the outer part to the inner part, the powder coal channel and the first oxidant channel are directly closely arranged, and the powder coal channel shrinks towards the axis direction of the powder coal burner at a part close to a fire-oriented end; the first water cooling jacket comprises a first water-in channel, a window type cooling water tank and a first water-out channel, the first water-in channel is communicated with the first water-out channel through the window type cooling water tank, and the window type cooling water tank is spirally wound at the fire-oriented end of the powder coal burner; the ignition burner is arranged in the inner cylinder and comprises a second water cooling jacket, a second oxidant channel, a fuel channel, an igniter and a central nitrogen channel. The dry powder coal gasifying combined burner has the advantages that the ignition technology is simplified, and the reliability of ignition and powder coal feeding is improved; flame diameters are effectively controlled, the condition of burning film type water cooling walls is avoided, and the reliability of a gasifier is improved.

Description

A kind of dry coal powder gasification assembled nozzle
Technical field
The utility model relates to a kind of dry coal powder gasification burner.
Background technology
Gasification refers to such as, sending into reactor as in vapourizing furnace through the coal (coal dust, coke granule, combustiblematerials powder etc.) of suitably processing, under the temperature and pressure of certain Coal Gasification Technology technical process, by oxygenant (air or oxygen and steam), change in some way gas, obtain synthetic gas (as CO, H 2, H 2o, CO 2deng) process, the synthetic gas generating 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), reach after certain condition, startup burner is exited, then 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 igniter burner igniting, boost, vapourizing furnace is heated to after high temperature, high pressure conditions and throws coal with coal dust burner.
Situation about moving by existing apparatus, adopts normal pressure igniting in the first sparking mode, rely on igniting, startup burner that vapourizing furnace is heated up, boosted, and after 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 coal dust burner is jumped car for some reason, the necessary blowing out of vapourizing furnace, cooling, displacement, then igniting again, expends 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 reaches after certain condition, and coal dust burner can put into operation; When coal dust burner is jumped after car, igniter burner, can be after system be repaired still in operation, and the coal dust burner that continues to put into operation, therefore has certain advance.But, from current operating performance, also there are 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 the situation that delays to light gas and even can not light gas.The second problem is because point of ignition is near igniter burner shower nozzle end face, 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 having 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, between coal dust passage and oxidant channel, will leave certain distance, the oxygenant (for example oxygen) flowing out from oxidant channel need to just likely meet and burn toward last segment distance in the end from igniter burner with the coal dust flowing out from coal dust passage.Because entering 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 declines rapidly, cause the mixture flow kinetic energy of oxygenant and coal dust not enough and compared with disperse, uncontrollable flame diameter, the thermal-flame producing after burning easily washes away burner hearth wall, or too near 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 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 detect, and cannot flame detection temperature, more cannot observe flame image.In gasifier operation process, cannot 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.
Utility model content
The purpose of this utility model is that 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 extracted, overcome the problem of uncontrollable combustion flame diameter and consequent easy scaling loss membrane wall simultaneously.
For achieving the above object, the utility model has been taked following technical scheme:
The utility model provides a kind of 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 in the close axis direction contraction to described coal dust burner gradually to 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 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 is also provided with swirl vane close to fire end place, make oxygenant when described the first oxidant channel flows out, possess the air-flow condition of high speed, high eddy flow, thereby can when mixing with coal dust, to it, drag 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 being circumferentially 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 is totally 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 °, coal dust can be mixed with the oxygenant flowing 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, because the ignition energy of described high energy igniter is apparently higher than the isolating high-pressure ignitor (2J left and right) adopting 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 lighter for ignition center simultaneously.
Preferably, described dry coal powder gasification assembled nozzle also comprises the flame detector system for monitoring 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 with for imaging combustion and the temp measuring system of flame video and flame temperature are provided.Further preferably, between described flame detector system and described center channel of nitrogen, be provided with isolation window.
Dry coal powder gasification assembled nozzle of the present utility model 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.
Accompanying drawing explanation
Fig. 1 is the sectional view of dry coal powder gasification assembled nozzle of the present utility model;
Fig. 2 is the enlarged view of the igniter burner shown in Fig. 1;
Fig. 3 is the effect explanatory view of dry coal powder gasification assembled nozzle operation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, a preferred embodiment of the present utility model is described in detail.
As shown in Figure 1, dry coal powder gasification assembled nozzle of the present utility model 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 9 and 3 coal powder entrance passages 6 of discharge passage to fire end to back of the body fire end, 3 coal powder entrance passages 6 being circumferentially uniformly distributed along coal dust burner 1, be each other 120 °, discharge passage 9 is and the circular channel of 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 being provided with swirl vane 11 to fire end place, 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, near being in to fire end, between fuel channel 24He center channel of nitrogen 25, be provided with high energy igniter 26, the second water entrys 21 and the second water exit 22 forms the second water-cooling jacket.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 flowing 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 to carry out 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 is during through the window formula cooling trough 5 of coiled coil; by high-speed screw, flow; water coolant can attenuate even destroys the side towards the fire laminar sub-layer of turbulent flows; improve heat transfer effect; effectively protection burner side towards the fire, work-ing life and the continuous operating time of raising assembled nozzle, be that vapourizing furnace long-period stable operation is created prerequisite.Adopt the cooled side towards the fire temperature of which 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 utility model 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 be additionally set again thus, thereby make from discharge passage 9 and the first oxygen channel 7 closely closely, the coal dust jet flowing 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 high speed that flow to the oral area of coal dust burner 1 and flow out with the first oxygen channel 7 along the wall of the discharge passage 9 that the axis direction to coal dust burner 1 shrinks gradually, the oxygen of high eddy flow fully mixes immediately, now oxygen kinetic energy attenuation degree is lower, coal dust jet is dragged and is drawn by oxygen jet thus, shear and atomization, as shown in Figure 3, can either guarantee that 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 burner hearth wall, avoided membrane wall to be burnt, improved the safety and reliability of vapourizing furnace.
Simultaneously; 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 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 for interlocking, analog quantity is used 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 only for illustration of the utility model; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from the utility model spirit and scope; 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 utility model, and scope of patent protection of the present utility model 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 in the close axis direction contraction to described coal dust burner gradually to 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 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 is also provided with swirl vane close to 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 being circumferentially uniformly distributed of described coal dust burner.
6. according to the dry coal powder gasification assembled nozzle described in 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 the flame detector system for monitoring 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 with for imaging combustion and the temp measuring system of 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.
CN201320632899.XU 2013-10-14 2013-10-14 Dry powder coal gasifying combined burner CN203569048U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103497785A (en) * 2013-10-14 2014-01-08 神华集团有限责任公司 Dry-pulverized-coal gasification combined burner
CN105132038A (en) * 2015-09-30 2015-12-09 西安航天源动力工程有限公司 Improved water coal slurry process nozzle
CN107033972A (en) * 2017-05-09 2017-08-11 哈尔滨工业大学 A kind of dry coal powder airflow bed gasification furnace burner with purging gas shielded
WO2018188211A1 (en) * 2017-04-14 2018-10-18 航天长征化学工程股份有限公司 Gasification burner
CN109985610A (en) * 2019-03-20 2019-07-09 中国科学院青岛生物能源与过程研究所 A kind of active carbon regenerating unit and method based on from maintenance burning

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103497785A (en) * 2013-10-14 2014-01-08 神华集团有限责任公司 Dry-pulverized-coal gasification combined burner
CN105132038A (en) * 2015-09-30 2015-12-09 西安航天源动力工程有限公司 Improved water coal slurry process nozzle
CN105132038B (en) * 2015-09-30 2018-11-02 西安航天源动力工程有限公司 A kind of modified coal water slurry process burner
WO2018188211A1 (en) * 2017-04-14 2018-10-18 航天长征化学工程股份有限公司 Gasification burner
CN107033972A (en) * 2017-05-09 2017-08-11 哈尔滨工业大学 A kind of dry coal powder airflow bed gasification furnace burner with purging gas shielded
CN109985610A (en) * 2019-03-20 2019-07-09 中国科学院青岛生物能源与过程研究所 A kind of active carbon regenerating unit and method based on from maintenance burning

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