CN207815331U

CN207815331U - A kind of gas phase preheating furnace burner arrangement

Info

Publication number: CN207815331U
Application number: CN201721510713.8U
Authority: CN
Inventors: 朱森
Original assignee: Individual
Current assignee: Shandong Yankuang Coal Chemical Overhaul Co Ltd
Priority date: 2017-11-14
Filing date: 2017-11-14
Publication date: 2018-09-04
Anticipated expiration: 2027-11-14

Abstract

The utility model discloses a kind of gas phase preheating furnace burner arrangements, it include the spit tube positioned at lower portion of furnace body, the spit tube runs through the lower part of furnace body, and with heat exchange unit spatial vertical, uniformly distributed multiple burners on spit tube, fuel -supply pipe is provided in spit tube, the gap between fuel -supply pipe and spit tube forms cooling passage, and the bottom of burner is stretched into spit tube to be connected to fuel -supply pipe.A kind of gas phase preheating furnace burner arrangement of the utility model, mainly overcome the pre- thermal efficiency of the nozzle structure of traditional preheating furnace low, the problem high to burner performance requirement, by the way that multiple burners are arranged and are equipped with cooling line, effectively extend the service life of burner, reduce the requirement to burner performance, burner preheating is efficient, simultaneously, by providing a kind of burner Ni Fe based high-temperature alloy materials, burner is set to be less prone to crackle and deformation at high temperature, service life is further extended, and the operating cost of preheating furnace has been saved.

Description

A kind of gas phase preheating furnace burner arrangement

Technical field

The utility model is related to gas phase preheating furnace apparatus field, more particularly to a kind of gas phase preheating furnace burner arrangement.

Background technology

The preparation method of Nano titanium dioxide mainly include Physical and chemical method, Physical mainly include sputtering method, Thermal evaporation and laser evaporization method, chemical method mainly include liquid phase method and vapor phase method, liquid phase method mainly include sluggish precipitation and Sol-gel method, vapor phase method include mainly TiCl₄Vapour phase oxidation process generally uses TiCl at present₄Vapour phase oxidation process is received to prepare Rice titanium dioxide.TiCl₄Vapour phase oxidation process is usually with nitrogen as TiCl₄Carrier gas, using oxygen as oxidant, in high temperature Oxidation reaction is carried out in tubular reactor, through gas solid separation, obtains nanometer level titanium dioxide powder, in the process, when stop Between and reaction temperature have an impact to the grain size and grain size of titanium dioxide.Reaction temperature is higher, and grain boundary decision rate is faster, and sintering is driven Power is bigger, and then causes particle surface product smaller, and grain size increases.In actual production, oxygen need to be pre-heated to 800 DEG C with On could be with the TiCl of gas phase₄Oxygen is preheated to 800 DEG C or more and needs setting one huge and complicated pre- by hybrid reaction Hot systems, not only cost is high for traditional pre-heating system, and the pre- thermal efficiency is relatively low, and preheating time is long, is wanted to pre-heating device Ask high, resource utilization is poor, and oxygen could be preheated to 800 DEG C or more by needing to consume a large amount of energy, moreover, when needing When obtaining the oxygen of different preheating temperatures, traditional pre-heating system can only be by obtaining in batches, and cannot be by primary Property pre- hot work come needed for obtaining, this results in bad adaptability of traditional pre-heating system to demand, can not be directed to the change of demand It brings and makes corresponding adjustment.

Meanwhile traditional preheating furnace burner it is general only there are one, and the side of furnace body is set to, by burner to furnace body Interior flame, and then exchange hot cell and heated, this flame mode existing defects, i.e., close to the heat exchange unit of flame kernel institute It obtains heat and is more than the obtained heat of heat exchange unit for being located at flame both sides, and then the heat for causing each heat exchange unit to be obtained Unevenness, the preheating rate that oxygen is obtained in each heat exchange unit is different, not only results in the preheating temperature of oxygen It is unstable, it also results in the heat exchange unit long-time burning close to flame kernel and scraps, shorten heat exchange unit uses week Phase.Moreover, in order to enable furnace body to obtain enough heats, often burner needs to gush out the very high flame of heat, to maintain High temperature in furnace body, this just proposes the material of burner and structure very high requirement, and the burner for being generally used for high-temperature heating is equal There are problems that burning, the service life of burner is needed to constantly change not as good as the half of design service life, and the cost of burner Again more expensive, this undoubtedly increases the operating cost of preheating furnace.

Utility model content

The goal of the invention of the utility model is：In view of the above problems, a kind of gas phase preheating furnace burner is provided Device, to solve deficiency of the prior art.

The technical solution adopted in the utility model is as follows：A kind of gas phase preheating furnace burner arrangement, including be located under furnace body The spit tube in portion, which is characterized in that the spit tube runs through the lower part of furnace body, and with heat exchange unit spatial vertical, on spit tube Multiple burners are evenly distributed with, fuel -supply pipe is provided in spit tube, the gap between fuel -supply pipe and spit tube forms coolant liquid Channel, the bottom of burner is stretched into spit tube to be connected to fuel -supply pipe.

By setting spit tube, multiple burners are set on spit tube, it is uniform into furnace body by the burner on spit tube Flame makes each heat exchange unit can obtain more uniform heat, thus solves the problems, such as that heat exchange unit uneven heating is even, together When, by way of uniformly multiple burners, make burner without gushing out very high heat to maintain the high temperature in furnace body, this just changes The use environment of burner has been apt to it, has reduced the performance requirement to burner, the service life of burner is effectively extended.Meanwhile this Flame function is better achieved using two-tube structure in utility model, and good effect mainly has at 2 points：One can be prevented from The pipeline self-temperature for conveying fuel is excessively high, effectively reduces the influence conveyed to fuel；Second is that spit tube and fuel -supply pipe Between gap can be used for conveying coolant liquid（Cooling water）, to be cooled down simultaneously to fuel -supply pipe, burner and spit tube, prevent Only its burning, thus while preventing security risk, moreover it is possible to which effectively extend fuel -supply pipe, burner and spit tube uses the longevity Life.In addition, the setting of cooling passage can also be used to examine the leakproofness of fuel -supply pipe, when fuel -supply pipe leaks When, it can find and take emergency measures in time, reach good effect well.

Further, in order to preferably implement the spit tube structure of the utility model, one end of fuel -supply pipe is that fuel is defeated It is cecum to send mouth, the other end；The open at both ends of spit tube forms cooling liquid inlet and cooling liquid outlet.

In view of in cooling procedure, coolant liquid can be the outer wall fouling of fuel -supply pipe the problem of, fuel in order to prevent The outer wall of delivery pipe is corroded, and the outer wall of fuel -supply pipe coats one layer of polytetrafluoroethylene ethylene layer, the thickness of polytetrafluoroethylene ethylene layer Not less than 300 μm.The main function of polytetrafluoroethylene ethylene layer is to prevent coolant liquid in the outer wall fouling of fuel -supply pipe, is thus protected The outer wall of fuel -supply pipe is not influenced by corroding, and anticorrosion ability well is played.

It is fully heated to enable the heat source that burner ejects to exchange hot cell, the axis between adjacent burner is uneven Row, and be symmetrical arranged in the vertical direction about the midpoint of the line between adjacent burner, so that the burner below heat exchange unit Spout can be directed at heat exchange unit and sprayed, and then exchange hot cell and fully heated.

Further, for the mechanical behavior under high temperature for improving burner and anti-properties of smoker, the burner is closed with Ni-Fe base high temperature Golden material manufacture forms, and by mass percentage, the Ni-Fe based high-temperature alloys material includes following alloying element：C：0.04- 0.05%、Fe：19.0-21.0%、Cr：19.5-20.5%、Al:0.90-1.05%、Ti：2.65-2.80%、V：0.20-0.30%、 Mo：2.0-2.5%、Nb：1.50-1.70%、Y+Ce：0.046-0.058%、B：0.003-0.006%, surplus are Ni and other miscellaneous Matter.

Burner provided by the utility model has outstanding mechanical behavior under high temperature and anti-cigarette with Ni-Fe based high-temperature alloy materials Gas corrosion performance mainly solves burner at 800 DEG C or more, " burning " and " hot tearing " phenomenon easily occurred, in 850 DEG C of height Under temperature, the Ni-Fe based high-temperature alloy materials of the utility model disclosure satisfy that needs of the preheating furnace to burner performance, at high temperature It is less prone to crackle and deformation, the more general burner of service life will be grown, and the operating cost of preheating furnace has been saved.

In order to preferably implement the Ni-Fe based high-temperature alloy materials of the utility model, the system of Ni-Fe based high-temperature alloy materials Preparation Method includes the following steps：

1）Raw material is weighed by component percentages, using the existing preparation process for smelting high temperature alloy, in vaccum sensitive stove Melting is carried out at 1500 DEG C, solution pours into alloy casting blank；

2）Alloy casting blank is subjected to removing surface, is subsequently placed in vacuum furnace and is heated to 810-820 DEG C and removes conjunction The oxide skin of golden casting billet surface obtains forging blank, and wherein heating rate control is in 120 DEG C/h；

3）Continue the forging blank to be heated to forging temperature to forge, room temperature is air-cooled to after forging, and carry out at surface Reason；

4）By after surface treatment forge piece carry out solid-solution and aging heat treatment after to obtain the final product.

Further, in step 4）In, the detailed process of solid-solution and aging heat treatment is：Solid solubility temperature is 1100-1150 DEG C, is protected Warm 2h, oil cooling；700-750 DEG C of an aging temperature keeps the temperature 20-25h, air-cooled；Secondary ageing treatment temperature 660-680 DEG C, 20-25h is kept the temperature, it is air-cooled.

In conclusion by adopting the above-described technical solution, the utility model has the beneficial effects that：The one of the utility model Kind gas phase preheating furnace burner arrangement, mainly overcomes the pre- thermal efficiency of the nozzle structure of traditional preheating furnace low, to burner performance requirement High problem effectively extends the service life of burner, reduces to burner by the way that multiple burners are arranged and are equipped with cooling line The requirement of performance, burner preheating is efficient, meanwhile, by providing a kind of burner Ni-Fe based high-temperature alloy materials, burner is made to exist Crackle and deformation are less prone under high temperature, service life is further extended, and the operating cost of preheating furnace has been saved.

Description of the drawings

Fig. 1 is a kind of preheating furnace structural schematic diagram for producing nano-titanium dioxide of the utility model；

Fig. 2 is the furnace body schematic cross-sectional view of the utility model.

It is marked in figure：1 is furnace body, and 2 be spit tube, and 3 be heat exchange unit, and 4 be burner, and 5 be fuel -supply pipe, and 6 be cooling Liquid channel, 7 be cecum.

Specific implementation mode

Below in conjunction with the accompanying drawings, the utility model is described in detail.

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As depicted in figs. 1 and 2, a kind of gas phase preheating furnace burner arrangement includes the spit tube 2 positioned at 1 lower part of furnace body, institute The lower part that spit tube 2 runs through furnace body 1 is stated, and with 3 spatial vertical of heat exchange unit, uniformly distributed multiple burners 4, spit tube 2 on spit tube 2 It is inside provided with fuel -supply pipe 5, the gap between fuel -supply pipe 5 and spit tube 2 forms cooling passage 6, the bottom of burner 4 It stretches into spit tube 2 and is connected to fuel -supply pipe 5.

By the way that spit tube 2 is arranged, multiple burners 4 are set on spit tube 2, by the burner 4 on spit tube 2 to furnace body 1 Interior uniform flame makes each heat exchange unit 3 can obtain more uniform heat, it is even thus to solve 3 uneven heating of heat exchange unit The problem of, meanwhile, by way of uniformly multiple burners 4, make burner 4 without gushing out very high heat to maintain in furnace body 1 High temperature reduce the performance requirement to burner 4 this improves the use environment of burner 4, the service life of burner 4 obtains Effectively extend.Meanwhile flame function is better achieved using two-tube structure in the utility model, good effect mainly has two Point：One can be prevented from conveying fuel pipeline self-temperature it is excessively high, effectively reduce the influence conveyed to fuel；Second is that flame Gap between pipe 2 and fuel -supply pipe 5 can be used for conveying coolant liquid（Cooling water）, with simultaneously to fuel -supply pipe 5, burner 4 It is cooled down with spit tube 2, its burning is prevented, thus while preventing security risk, moreover it is possible to effectively extend fuel -supply pipe 5, the service life of burner 4 and spit tube 2.In addition, the setting of cooling passage 6 can also be used to examine fuel -supply pipe 5 Leakproofness can find and take emergency measures in time when fuel -supply pipe 5 leaks, and reach well actively effect Fruit.

Further, in order to preferably implement 2 structure of spit tube of the utility model, one end of fuel -supply pipe 5 is combustion Expect delivery port（It is not drawn into figure）, the other end is cecum 7；The open at both ends of spit tube 2 forms cooling liquid inlet（It is not drawn in figure Go out）And cooling liquid outlet（It is not drawn into figure）.

In view of in cooling procedure, coolant liquid can be the outer wall fouling of fuel -supply pipe 5 the problem of, fuel in order to prevent The outer wall of delivery pipe 5 is corroded, and the outer wall of fuel -supply pipe 5 coats one layer of polytetrafluoroethylene ethylene layer（It is not drawn into figure）, poly- four The thickness of vinyl fluoride layer is not less than 300 μm.The main function of polytetrafluoroethylene ethylene layer is to prevent coolant liquid in the outer of fuel -supply pipe 5 Thus wall fouling protects the outer wall of fuel -supply pipe 5 not by the influence corroded, plays anticorrosion ability well.

Further, it is fully heated to enable the heat source that burner 4 ejects to exchange hot cell 3, adjacent burner 3 Between axis it is not parallel, and be symmetrical arranged in the vertical direction about the midpoint of the line between adjacent burner 3, so that heat exchange is single The spout of the burner 4 of 3 lower section of member can be directed at heat exchange unit 3 and be sprayed, and then exchanges hot cell 3 and fully heated.（Figure Burner in 2 is to be arranged mutually parallel, but it does not represent the burner of the utility model as parallel arrangement, and multiple burners are delineated For parallel arrangement cause primarily to the preferably arrangement of the nozzle in furnace body of displaying the utility model, therefore, In actual use, it needs to arrange nozzle inclination）

Further, for the mechanical behavior under high temperature for improving burner 4 and anti-properties of smoker, the burner 4 is high with Ni-Fe bases Temperature alloy material manufacture forms, and by mass percentage, the Ni-Fe based high-temperature alloys material includes following alloying element：C： 0.04-0.05%、Fe：19.0-21.0%、Cr：19.5-20.5%、Al:0.90-1.05%、Ti：2.65-2.80%、V：0.20- 0.30%、Mo：2.0-2.5%、Nb：1.50-1.70%、Y+Ce：0.046-0.058%、B：0.003-0.006%, surplus be Ni and its Its impurity.

Among the above, the preparation method of Ni-Fe based high-temperature alloys material includes the following steps：

In step 3）In, forging temperature is 1200-1250 DEG C, time 2-3h, and starting forging temperature is 1150 DEG C, stops forging temperature It is 850 DEG C.Starting forging temperature and the selection for stopping forging temperature are extremely important, in addition to being required according to the selection of conventional forging temperature, centainly It is noted that the width range of forging temperature and the terminal of forging temperature, the terminal of forging temperature is excessively high, and forging blank is not easy The fine and closely woven tissue of crystal grain is obtained, mechanical property is poor, and the terminal of forging temperature is too low, then phase transformation crackle easily occurs, in this reality In novel, forging temperature be 1200-1250 DEG C, starting forging temperature be 1150 DEG C, stop forge temperature be 850 DEG C when, forging blank it is easy Obtain satisfactory forging.

The forging base that crack defect is few in order to obtain, crystal grain is fine and closely woven and is evenly distributed, after forging blank reaches forging temperature, Blank upsetting pull will be forged using forge press and becomes shape forging formation forging base, wherein fire time is 4, and forging ratio control is in 6.2- 6.5, upsetting pull process need to respectively carry out 3 times.

Further, in step 3）In, forging base be cooled to stop forge temperature after, continue to send into forge press upsetting pull become It is 4 that die forging, which causes certain thickness alloy slab, fire time, and forging ratio is controlled in 2.0-2.3, and upsetting pull process need to respectively carry out 3 times, with So that final getable alloy slab metallographic structure is more refined, be more evenly distributed, the defects of gentle hole of flawless is mingled with exists.

Further, in step 4）In, the detailed process of solid-solution and aging heat treatment is：Solid solubility temperature is 1100-1150 DEG C, Keep the temperature 2h, oil cooling；700-750 DEG C of an aging temperature keeps the temperature 20-25h, air-cooled；Secondary ageing treatment temperature 660-680 DEG C, 20-25h is kept the temperature, it is air-cooled.

In order to which the utility model is better described, table 1 lists section Example：

1 Ni-Fe based high-temperature alloys material composi of table and content（Impurity is omitted herein）

The main performance of Ni-Fe based high-temperature alloys material made from above-described embodiment is as shown in table 2：

The main performance of 2 embodiment 1-5 final alloy materials of table

Note：1, toughness is measured by Charpy impact machine tester；

2, etching extent uses 65% nitric acid corrosion tests, that is, sample is put into 65% salpeter solution of boiling when testing Continuous 48h is a cycle, in totally 5 periods, finally calculates average corrosion rate, wherein sample is at it at 750-850 DEG C It is cooled to 100 DEG C or so rear experiments.

It can be obtained by table 2, at 850 DEG C, the tensile strength of the Ni-Fe based high-temperature alloy materials of the utility model reaches To 1270N/mm², yield strength reaches 1030 N/mm², toughness reaches 12.1 J/cm², the rate of corrosion minimum 0.031 mm/ months, Therefore needs of the preheating furnace to burner performance be disclosure satisfy that, has outstanding mechanical behavior under high temperature and anti-flue gas rotten at high temperature Corrosion energy, is less prone to crackle and deformation, solves the burner being fabricated with high-temperature alloy material at 800 DEG C or more, easily The problem of " burning " and " hot tearing " that occurs, the operating cost of preheating furnace is saved.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model Protection domain within.

Claims

1. a kind of gas phase preheating furnace burner arrangement includes the spit tube positioned at lower portion of furnace body, which is characterized in that the spit tube Through the lower part of furnace body, and with heat exchange unit spatial vertical, it is defeated to be provided with fuel in spit tube for uniformly distributed multiple burners on spit tube Pipe is sent, the gap between fuel -supply pipe and spit tube forms cooling passage, and the bottom of burner is stretched into spit tube and fuel Delivery pipe is connected to.

2. gas phase preheating furnace burner arrangement as described in claim 1, which is characterized in that one end of fuel -supply pipe is fuel Delivery port, the other end are cecum；The open at both ends of spit tube forms cooling liquid inlet and cooling liquid outlet.

3. gas phase preheating furnace burner arrangement as described in claim 1, which is characterized in that the outer wall coating one of fuel -supply pipe The thickness of layer polytetrafluoroethylene ethylene layer, polytetrafluoroethylene ethylene layer is not less than 300 μm.

4. gas phase preheating furnace burner arrangement as described in claim 1, which is characterized in that the axis between adjacent burner is uneven Row, and be symmetrical arranged in the vertical direction about the midpoint of the line between adjacent burner.