CN102250644A - Process burner of water-coal slurry gasification furnace - Google Patents
Process burner of water-coal slurry gasification furnace Download PDFInfo
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- CN102250644A CN102250644A CN2011101434894A CN201110143489A CN102250644A CN 102250644 A CN102250644 A CN 102250644A CN 2011101434894 A CN2011101434894 A CN 2011101434894A CN 201110143489 A CN201110143489 A CN 201110143489A CN 102250644 A CN102250644 A CN 102250644A
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Abstract
The invention relates to a process burner of a water-coal slurry gasification furnace. The process burner comprises an outer spray head and a middle spray head, wherein the outer spray head is used for oxygen circulation; the middle spray head is located inside the outer spray head and used for water-coal slurry circulation; an oxygen introduction part communicated with a chamber of the outer spray head is arranged on the middle spray head and is used for introducing oxygen in the chamber of the outer spray head into a chamber of the middle spray head; the oxygen introduction part is composed of an introduction hole and a buffering ring; the introduction hole is communicated with the chamber of the outer spray head and the buffering ring; and the buffering ring is communicated with the chamber of the middle spray head. Through the structure design, partial oxygen in the outer spray head is introduced into the chamber of an inner spray head, so that an oxygen layer is formed close to the inner wall of the inner spray head, and the oxygen layer can prevent direct contact between the water-coal slurry flowing through the middle spray head and the inner wall of the chamber of the middle spray head, thereby reducing the wearing of the water-coal slurry to the inner wall (inner chamber) of the chamber of the middle spray head, prolonging the maintenance period caused by the inner chamber wearing of the middle spray head, lowering investment and operation cost, and especially lowering the operation cost significantly.
Description
Technical field
The present invention relates to a kind of coal slurry gasifier process burner.
Background technology
At present the vapourizing furnace process burner head construction that generally adopts as shown in Figure 1, the factor that the design of burner need be considered has following:
(1) structure formation: be concentric three sleeve pipes, be outer shower nozzle (outer oxygen pipe) 1, middle shower nozzle (coal water slurry pipe) 2 and interior shower nozzle (central oxygen pipe) 3 from outside to inside successively, the outlet of interior shower nozzle (central oxygen pipe) 3 is designed to the reducing form, purpose is that central oxygen is quickened, its end face has certain retraction amount with respect to burner cross section basis face simultaneously, form the pre-mixing chamber 4 of a coal water slurry and central oxygen like this, the export pipeline of coal water slurry also is designed to the reducing form, makes the coal water slurry that enters pre-mixing chamber 4 possess certain speed.In pre-mixing chamber 4, utilize central oxygen coal water slurry to be diluted and acceleration just, improve the rheological property of coal water slurry, its objective is in order to guarantee the atomizing effect of coal water slurry after leaving burner.The retraction amount of the outer oxygen mouth of pipe is bigger, and purpose provides the more oxygen of high flow rate, makes the coal water slurry mixture by pre-mixing chamber 4 carry out good atomizing, so that reach good gasification result in vapourizing furnace.
(2) circulation passage: no matter be central oxygen, or the circulation area of coal water slurry and outer oxygen, all need the satisfied traffic requirement of medium separately.Under the situation that supply pressure allows, strive reaching good mixing and atomizing effect.But the ratio of central oxygen has certain restriction, is generally 5%～25% of total oxygen demand, and all the other are all as outer oxygen.The central oxygen amount can not be too little, not so do not reach dilution and booster action to coal slurry.The central oxygen amount can not be too big, and on the one hand, too conference increases too much the mixture velocity in pre-mixing district 4, causes the wearing and tearing in central oxygen pipe 3 exits to increase the weight of, and reduces the continuous work-ing life of burner; On the other hand, when the central oxygen amount increases, the axial velocity component of burner outlet material is increased, radial velocity component reduces, consequently make the flame of whole burner outlet become elongated, can't mate with the inner profile of vapourizing furnace, cause larger-diameter pulverized coal particle to shorten at the gasification residing time in furnace, the carbon content in the slag increases, cause that gasification efficiency reduces, and, can make flame fling furnace bottom, influence the work of furnace bottom chilling ring.
(3) flow velocity: the exit velocity of central oxygen is generally 150～180m/s, and the coal slurry exit velocity is generally 2～4m/s, and pre-mixing chamber outlet mean flow rate is generally 12～20m/s, and the exit velocity of outer oxygen is generally 160～200m/s.
According to the production practical situation of the experience of being engaged in the development of coal slurry gasifier process burner for many years and industrialization operation, it is that cooling water coil 5 damages that the damage mode of coal slurry gasifier process burner mainly contains three kinds; Middle shower nozzle 2 physics abrasion; Heat, chemistry, stress make outer shower nozzle 1 impaired.
Summary of the invention
The objective of the invention is by improvement, reduce the physical abrasion of centering nozzle cavity, strengthen its antiwear property, thereby reduce the number of times of shutdown maintenance and maintenance, and then reduce investment cost and working cost existing coal slurry gasifier process burner.
In order to achieve the above object, the invention provides a kind of coal slurry gasifier process burner, comprise the outer shower nozzle of oxygen supply air communication and be arranged on the middle shower nozzle that the water supply coal slurry in this outer shower nozzle circulates, special character is, should be provided with being used for of communicating with outer shower nozzle chamber by middle shower nozzle with the oxygen introduction part in the importing of the oxygen in the outer shower nozzle chamber shower nozzle chamber, this introduction part is made of entrance hole and buffering ring, and entrance hole is communicated with outer shower nozzle chamber and buffering ring, and buffering ring communicates with middle shower nozzle chamber.
Above-mentioned entrance hole is 4～8.
Shower nozzle circumferentially evenly is provided with in the above-mentioned entrance hole edge.
By this kind structure Design, realized the partial oxygen conductance in the outer shower nozzle is gone into interior shower nozzle chamber, thereby near interior shower nozzle inwall, form an oxygen layer, play and stop the coal water slurry of the middle shower nozzle of flowing through to contact with the direct of middle shower nozzle chamber inner wall, and then reach the effect of the wearing and tearing that reduce coal water slurry centering shower nozzle chamber inner wall (inner chamber), with prolong because of in the maintenance intervals that causes of nozzle cavity wearing and tearing, reduce invest and the reduction of working cost, especially working cost particularly evident.
Description of drawings
Fig. 1 is existing coal slurry gasifier process burner diagrammatic cross-section.
Fig. 2 is improved coal slurry gasifier process burner diagrammatic cross-section.
Embodiment
Referring to Fig. 2, the structure formation of improved coal slurry gasifier process burner is similarly concentric three sleeve pipes, promptly be outer shower nozzle (outer oxygen pipe) 1 from outside to inside successively, middle shower nozzle (coal water slurry pipe) 2 and interior shower nozzle (central oxygen pipe) 3, the outlet of interior shower nozzle (central oxygen pipe) 3 still is the reducing form, purpose is that central oxygen is quickened, its end face has certain retraction amount with respect to burner cross section basis face simultaneously, form the pre-mixing chamber 4 of a coal water slurry and central oxygen like this, the export pipeline of coal water slurry also is designed to the reducing form, makes the coal water slurry that enters pre-mixing chamber 4 possess certain speed.Outer shower nozzle (outer oxygen pipe) 1 periphery still is provided with cooling water coil 5.
Improvement to existing coal slurry gasifier process burner, mainly be in order to reduce the physical abrasion of centering shower nozzle in the operational process (coal water slurry pipe) 2 inner chambers, strengthen its antiwear property, thereby reduce the number of times of shutdown maintenance and maintenance, and then minimizing investment cost and working cost, for this reason, the present invention has increased on the basis of existing coal slurry gasifier process burner in the shower nozzle (coal water slurry pipe) 2 in the importing of the oxygen in the outer shower nozzle (outer oxygen pipe) 1, so that near middle shower nozzle (coal water slurry pipe) 2 chamber inner walls, form an oxygen layer, thereby stop the coal water slurry of the middle shower nozzle (coal water slurry pipe) 2 of flowing through to contact with the direct of middle shower nozzle chamber inner wall, and then reach the effect of the wearing and tearing that reduce coal water slurry centering shower nozzle (coal water slurry pipe) 2 chamber inner walls (inner chamber), with prolong because of in shower nozzle (coal water slurry pipe) the 2 inner chambers maintenance intervals that weares and teares and cause, reduce the reduction of investment and working cost, especially working cost.
For this reason, the spy has set up an introduction part on middle shower nozzle (coal water slurry pipe) 2, and this introduction part is by entrance hole 6 and 7 one-tenth of buffering ring structures, and entrance hole 6 is communicated with outer shower nozzle (outer oxygen pipe) 1 chamber and buffering rings 7, and buffering ring 7 communicates with middle shower nozzle (coal water slurry pipe) 2 chambers.So, just realized the partial oxygen conductance in the outer shower nozzle (outer oxygen pipe) 1 is gone in the chamber of middle shower nozzle (coal water slurry pipe) 2, thereby near the chamber inner wall of middle shower nozzle (coal water slurry pipe) 2, form an oxygen layer, reach and stop the coal water slurry of the middle shower nozzle (coal water slurry pipe) 2 of flowing through to contact, and then reach the effect of the wearing and tearing of reduction coal water slurry centering shower nozzle (coal water slurry pipe) 2 chamber inner walls (inner chamber) with middle shower nozzle (coal water slurry pipe) the direct of 2 chamber inner walls.
In order to ensure the import volume of oxygen, it is 4～8 that entrance hole 6 preferably is provided with, and shower nozzle (coal water slurry pipe) 2 circumferentially evenly is provided with best in the edge.
Claims (3)
1. coal slurry gasifier process burner, comprise the outer shower nozzle of oxygen supply air communication and be arranged on the middle shower nozzle that the water supply coal slurry in this outer shower nozzle circulates, it is characterized in that: shower nozzle is provided with being used for the oxygen introduction part in the importing of the oxygen in the outer shower nozzle chamber shower nozzle chamber of communicating with outer shower nozzle chamber in this, this introduction part is made of entrance hole and buffering ring, entrance hole is communicated with outer shower nozzle chamber and buffering ring, and buffering ring communicates with middle shower nozzle chamber.
2. coal slurry gasifier process burner according to claim 1 is characterized in that: described entrance hole is 4～8.
3. coal slurry gasifier process burner according to claim 1 and 2 is characterized in that: shower nozzle circumferentially evenly is provided with in the described entrance hole edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101434894A CN102250644A (en) | 2011-05-30 | 2011-05-30 | Process burner of water-coal slurry gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101434894A CN102250644A (en) | 2011-05-30 | 2011-05-30 | Process burner of water-coal slurry gasification furnace |
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| Publication Number | Publication Date |
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| CN102250644A true CN102250644A (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011101434894A Pending CN102250644A (en) | 2011-05-30 | 2011-05-30 | Process burner of water-coal slurry gasification furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583243A (en) * | 2012-03-02 | 2012-07-18 | 上海锅炉厂有限公司 | Gasification burner for producing synthetic gas through gasifying fuel slurry |
| CN103045306A (en) * | 2012-12-26 | 2013-04-17 | 中国东方电气集团有限公司 | Coal water slurry bubble atomizing nozzle |
| CN109825333A (en) * | 2019-02-28 | 2019-05-31 | 北京航化节能环保技术有限公司 | A kind of process burner device with central oxygen regulatory function |
-
2011
- 2011-05-30 CN CN2011101434894A patent/CN102250644A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583243A (en) * | 2012-03-02 | 2012-07-18 | 上海锅炉厂有限公司 | Gasification burner for producing synthetic gas through gasifying fuel slurry |
| CN103045306A (en) * | 2012-12-26 | 2013-04-17 | 中国东方电气集团有限公司 | Coal water slurry bubble atomizing nozzle |
| CN103045306B (en) * | 2012-12-26 | 2015-02-04 | 中国东方电气集团有限公司 | Coal water slurry bubble atomizing nozzle |
| CN109825333A (en) * | 2019-02-28 | 2019-05-31 | 北京航化节能环保技术有限公司 | A kind of process burner device with central oxygen regulatory function |
| CN109825333B (en) * | 2019-02-28 | 2024-04-09 | 北京航化节能环保技术有限公司 | Process burner device with central oxygen adjusting function |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |