CN209623382U

CN209623382U - A kind of sintering of energy-saving efficient, pelletizing denitrating flue gas afterburning furnace

Info

Publication number: CN209623382U
Application number: CN201920200623.1U
Authority: CN
Inventors: 曹丰平
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2019-11-12
Anticipated expiration: 2029-02-15

Abstract

The utility model relates to a kind of sintering of energy-saving efficient, pelletizing denitrating flue gas afterburning furnace, this kind of energy-saving efficient sintering, pelletizing denitrating flue gas afterburning furnace, including furnace body, one end of furnace body is provided with front end wall, exhaust pass is connected in the other end of furnace body, the furnace body includes the outer housing that ecto-entad is set gradually, inner housing and liner, a UTILIZATION OF VESIDUAL HEAT IN interlayer is surrounded between outer housing and inner housing, the combustion air exports being connected to furnace interior space are offered close to the side of front end wall in UTILIZATION OF VESIDUAL HEAT IN interlayer, the other side offers combustion air inlet, the liner ecto-entad is disposed with insulating layer, thermal insulation layer, flame retardant coating.By the way that UTILIZATION OF VESIDUAL HEAT IN interlayer is arranged, combustion air preheating in part therein will be passed through, not only save combustion air heating fuel consumption, and can be maintained inner housing and outer housing in lower temperature range by exchanging heat, the inner housing of straight carbon steel material and the service life of outer housing are extended to a certain extent.

Description

A kind of sintering of energy-saving efficient, pelletizing denitrating flue gas afterburning furnace

Technical field

The utility model relates to iron and steel smelting fume treatment field more particularly to a kind of sintering of energy-saving efficient, pelletizing cigarette Qi exhaustion nitre afterburning furnace.

Background technique

Iron and steel smelting industry is an industry of highly energy-consuming heavily contaminated.It data show, iron ore during iron and steel smelting Sintering, pelletizing process can generate about 48% NOx, be the greatest contamination object source of NOx.Currently, national and local governments are put into effect Various files to control steel sintering, in pelletizing industrial smoke NOx concentration of emission limit value.

Gas denitrifying technology is divided into wet process and dry method, mainly there is gas-phase reaction method, liquid absorption method, absorption method, liquid film Method, microbial method etc., what wherein denitration efficiency highest, technology were the most mature is selective catalytic reduction (SCR) denitrating technique.But The SCR catalyst reaction temperature of broad commercial applications is obtained at present generally at 260~400 DEG C, and is sintered, pelletizing flue-gas temperature one As be 120~160 DEG C (before desulfurization) or 50~110 DEG C (after wet process or semi-dry desulphurization), therefore no matter SCR denitration reaction device arrange Before desulfurization or after desulfurization, even if by GGH (gas-gas heat exchanger) with flue gas before flue gas denitration after denitration, due to heat exchange Device end difference is inevitable, therefore still needs to carry out concurrent heating, heating to flue gas before denitration using external heat source, for concurrent heating, is risen The problems such as combustion gas furnace of temperature is essential, and the generally existing thermal efficiency of this kind of afterburning furnace to have come into operation at present is lower, waste of energy.Tool Body problem is as follows: (1) when using blast furnace gas as fuel, temperature is generally below 950 degrees Celsius in burner hearth, and majority is Celsius 900 Degree left and right, although such temperature can reduce burner hearth radiation loss to a certain extent, but easily causes coal gas fuel not Completely burned, to reduce the utilization rate of blast furnace gas.(2) also have to improve gas utilization rate, control higher burner hearth Interior temperature, such as 1000-1200 degrees Celsius, in this temperature range, gas utilization rate is higher, accordingly for furnace body and outlet cigarette Road is more demanding, and existing afterburning furnace has use " ceramic fiber blanket+light weeight alumina brick (or light weight fireclay brick)+high-alumina brick " compound Inner lining structure, this structure make furnace shell external skin temperatures higher, in order to control furnace shell external skin temperatures at 50 DEG C hereinafter, in straight carbon steel Insulating layer is set again on the outside of furnace shell, and the long-term safety for causing furnace shell own temperature to have exceeded straight carbon steel reduces flue gas using temperature Furnace service life；Also there is combustion gas furnace using ceramic fiber module liner, it is fine although ensure that furnace shell external skin temperatures not superelevation Tie up module high temperature resistant sweep of gases it is poor, service life is shorter, and the fiber given out have cause SCR catalyst block can Energy property, it is very unfavorable to the operation of SCR catalyst.

Utility model content

The utility model in order to make up for the deficiencies of the prior art, provides a kind of energy-saving efficient denitrating flue gas concurrent heating Furnace, including a furnace body, the furnace interior form a burning gallery, one end of furnace body are provided with front end wall, on front end wall Equipped with the gas inlet being connected with blast furnace gas burner, it is connected with exhaust pass in the other end of furnace body, the furnace body includes Outer housing, inner housing and the liner that ecto-entad is set gradually surround waste heat benefit between the outer housing and the inner housing With interlayer, the combustion air being connected to furnace interior space is offered close to the side of the front end wall in UTILIZATION OF VESIDUAL HEAT IN interlayer and is gone out Mouthful, combustion air inlet is offered close to the side of the exhaust pass in UTILIZATION OF VESIDUAL HEAT IN interlayer；

The liner ecto-entad is disposed with insulating layer, thermal insulation layer, flame retardant coating.

The insulating layer uses ceramic fiber blanket, and the thermal insulation layer uses light weeight alumina brick or light weight fireclay brick, described resistance to Fire bed uses light mullite brick.

In UTILIZATION OF VESIDUAL HEAT IN interlayer along furnace body axis direction be equipped with several pieces of deflectors, the two sides of every piece of deflector respectively with Outer housing is connected with inner housing, and airflow channel is formed between adjacent baffle.

The communication port for being connected to neighboring gas flow path is equipped on deflector.

The ceramic fiber blanket and light mullite pouring material that the front end wall is set gradually by ecto-entad are combined.

Ceramic fiber blanket and ceramic fibre pouring material that the side wall of the exhaust pass is set gradually by ecto-entad or Light weeight alumina brick is combined.

Several combustion air exports are uniformly opened up along its circumferential direction on front end wall.

Venting of dust explosion mouth, thermometer hole, pressure tap and manhole used for overhaul are additionally provided on the furnace body.

The bottom of the furnace body is provided with saddle support.

The utility model using the above structure, advantageously: use by energy-saving efficient sintering, pelletizing denitrating flue gas Afterburning furnace will be passed through combustion air preheating in part therein, and not only save combustion air and add by the way that UTILIZATION OF VESIDUAL HEAT IN interlayer is arranged Hot fuel consumption, and can be maintained inner housing and outer housing in lower temperature range by exchanging heat, to a certain extent The inner housing of straight carbon steel material and the service life of outer housing are extended, and realizes the control of shell external surface low temperature.Pass through The compound lining layer of insulating layer, thermal insulation layer, flame retardant coating is set, thermal loss in furnace body is preferably reduced.

By the way that deflector is arranged in UTILIZATION OF VESIDUAL HEAT IN interlayer, combustion air is preferably realized in UTILIZATION OF VESIDUAL HEAT IN layer more Uniform dispersion, is more sufficiently used the heat to scatter and disappear to inner housing and outer housing.

Detailed description of the invention

Fig. 1 is the main view of the utility model；

Fig. 2 is along A-A in Fig. 1 to schematic cross-sectional view；

Fig. 3 is the top view of the utility model；

Fig. 4 is in Fig. 3 along B-B direction schematic cross-sectional view.

Specific embodiment

In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality It is described in detail with novel.

Many details are explained in the following description in order to fully understand the application, still, the application may be used also To be implemented using other than the one described here other modes, therefore, the protection scope of the application is not by described below Specific embodiment limitation.

In addition, in the description of the present application, it is to be understood that term " center ", "upper", "lower", "front", "rear", The orientation of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " axial direction ", " radial direction ", " circumferential direction " Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the application and simplifies description, and It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore It should not be understood as the limitation to the application.In addition, term " first ", " second " are used for description purposes only, and should not be understood as referring to Show or imply relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result, Feature can explicitly or implicitly include one or more this feature.In the description of the present application, the meaning of " multiple " It is two or more, unless otherwise specifically defined.

In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected, can also be communication；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements.For the ordinary skill in the art, may be used To understand the concrete meaning of above-mentioned term in this application as the case may be.

In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.In retouching for this specification In stating, the description of reference term " one embodiment ", " some embodiments ", " example ", " specific example " or " some examples " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the application In embodiment or example.In the present specification, schematic expression of the above terms are necessarily directed to identical embodiment Or example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples It can be combined in any suitable manner.

Embodiment 1:

As shown in figs. 1-4, in the present embodiment, energy-saving efficient sintering, pelletizing denitrating flue gas afterburning furnace, including one Furnace body 1 forms a burning gallery 2 inside the furnace body 1, one end of furnace body 1 is provided with front end wall 3, is equipped on front end wall 3 The gas inlet 5 being connected with blast furnace gas burner 4, wherein blast furnace gas burner 4 can be directly from buying, wherein high on the market The first combustion air inlet 41, burning torch 42, blast furnace gas import 43 are additionally provided on producer gas burner.In use, passing through Blast furnace gas and most combustion airs are passed through in furnace body 1 and are burnt by blast furnace gas burner 4, are connected in the other end of furnace body 1 It is connected to exhaust pass 6, the hot fume that completely burned generates is passed into denitration flue through exhaust pass 6 to be used, and the furnace body 1 wraps Outer housing 7, inner housing 8 and liner 9 that ecto-entad is set gradually are included, surrounds one between the outer housing 7 and the inner housing 8 UTILIZATION OF VESIDUAL HEAT IN interlayer 10 is offered close to the side of the front end wall 3 in UTILIZATION OF VESIDUAL HEAT IN interlayer 10 and is connected to 1 inner space of furnace body Combustion air exports 11, offer combustion air inlet 12 close to the side of the exhaust pass 6 in UTILIZATION OF VESIDUAL HEAT IN interlayer 10, Most of combustion air described in gas-fired helps air intlet 41 to enter furnace body 1 by first on blast furnace gas burner 4 Interior, small part combustion air is passed through in furnace body 1 after the heat exchange of UTILIZATION OF VESIDUAL HEAT IN interlayer 10.

9 ecto-entad of liner is disposed with insulating layer 901, thermal insulation layer 902, flame retardant coating 903.Liner can prevent furnace In vivo major part heat distribute, only minor heat is distributed to the inner housing 8 of straight carbon steel material and outer housing 7, but due to It is passed through combustion air heat exchange in the UTILIZATION OF VESIDUAL HEAT IN interlayer 10 formed between it, not only can control the temperature of 7 outer surface of outer housing low To 50 degrees Celsius hereinafter, and the temperature of inner housing 8 and outer housing 7 can be controlled in lower range in use, certain 7 service life of inner housing 8 and outer housing is extended in degree.The insulating layer 901 uses ceramic fiber blanket, ceramic fiber blanket tool There is preferable heat insulation effect, the thermal insulation layer 902 uses light weeight alumina brick or light weight fireclay brick, and thermal conductivity ratio lightweight is not come Stone brick is small, and heat insulation is also preferable, and the flame retardant coating 903 uses light mullite brick, and high temperature resistance is good, can bear The high temperature of 1500 degrees centigrades, when blast furnace gas combustion, local temperature is very high, using light mullite brick, causes to furnace body Damage it is smaller, and compared with high-alumina brick, can be reduced heat dissipation capacity, weight and amount of stored heat.And the compound lining of three is used, it can shut out Most of heat distributes in exhausted furnace body, improves heat utilization ratio.

Energy-saving efficient sintering, pelletizing denitrating flue gas afterburning furnace, compare existing apparatus, can be more adequately sharp The heat caused by gas-fired, improves heat utilization ratio, when institute's calorific requirement is identical, can save fuel use, reach Energy saving purpose.

Embodiment 2:

As shown in Figs 1-4, on the basis of one embodiment, in order to make full use of the heat in UTILIZATION OF VESIDUAL HEAT IN interlayer, Can in UTILIZATION OF VESIDUAL HEAT IN interlayer 10 along furnace body axis direction be equipped with several pieces of deflectors 13, the two sides of every piece of deflector 13 respectively with Outer housing 7 is connected with inner housing 8, and airflow channel 14 is formed between adjacent baffle 13.The setting of flow-guiding channel, may make and be passed through Combustion air be more uniformly full of between outer housing 7 and inner housing 8, avoid combustion air flow deflection when cause heat Straight carbon steel material outer housing 7 and inner housing are influenced using the generation of insufficient phenomenon so as to avoid hot-spot on the outside of furnace body 8 service life.

The communication port 15 for being connected to adjacent guide channel 14 is equipped on deflector 13.It can make gas in each airflow channel 14 Flowing pressure mutually balances, avoid outer housing 7 and 8 certain of inner housing bear it is too strong or excessively weak caused by unbalance stress phenomenon.

The ceramic fiber blanket and light mullite pouring material that the front end wall 3 is set gradually by ecto-entad are compound At.Wherein front end wall 3 can also use multilayered structure identical with 1 side wall of furnace body, but for comparing, compound with above-mentioned two layers Structure is more easier to build front end wall, and using effect is good.

Ceramic fiber blanket and ceramic fibre pouring material that the side wall of the exhaust pass 6 is set gradually by ecto-entad or Light weeight alumina brick is combined.It is built and is easy using this composite construction, and high-temperature resistant result is good, can avoid after gas-fired When the hot fume of generation flows through exhaust pass 6, doped sintered flue gas or cold wind reduce by 6 temperature of exhaust pass, to maintain to export 6 long service life of flue.

Several combustion air exports 11 are uniformly opened up along its circumferential direction on front end wall 3.Uniformly combustion air can be led to Enter in furnace body, convenient for being sufficiently mixed with combustion air, gas mixture from blast furnace gas burner.

Venting of dust explosion mouth 16, thermometer hole 17, pressure tap 18 and manhole used for overhaul 19 are additionally provided on the furnace body 1.Venting of dust explosion Mouth 16 avoids hypertonia from damaging furnace body for losing heart when hypertonia in furnace body；Thermometer hole 17 is to measure in furnace body Temperature；Pressure tap 18 is to measure pressure in furnace body, convenient for safe air pressure in control furnace body；Manhole 19 is used to enter furnace interior and examines It repairs.

The bottom of the furnace body 1 is provided with saddle support 20.Convenient for being placed in ground or steel construction is put down for furnace body 1 is firm On platform.

Above-mentioned specific embodiment cannot function as the limitation to scope of protection of the utility model, for art technology field Technical staff for, any alternate modification for made to the utility model embodiment or transformation all fall within the utility model Protection scope in.Place is not described in detail for the utility model, is those skilled in the art of the present technique's well-known technique.

Claims

1. a kind of energy-saving efficient sintering, pelletizing denitrating flue gas afterburning furnace, which is characterized in that including a furnace body, the furnace body Inside forms a burning gallery, and one end of furnace body is provided with front end wall, is equipped with and blast furnace gas burner phase on front end wall Gas inlet even, is connected with exhaust pass in the other end of furnace body, the furnace body includes the shell that ecto-entad is set gradually Body, inner housing and liner surround a UTILIZATION OF VESIDUAL HEAT IN interlayer between the outer housing and the inner housing, lean in UTILIZATION OF VESIDUAL HEAT IN interlayer The side of the nearly front end wall offers the combustion air exports being connected to furnace interior space, in UTILIZATION OF VESIDUAL HEAT IN interlayer close to institute The side for stating exhaust pass offers combustion air inlet；

2. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that The insulating layer uses ceramic fiber blanket, and the thermal insulation layer uses light weeight alumina brick or light weight fireclay brick, and the flame retardant coating uses Light mullite brick.

3. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that In UTILIZATION OF VESIDUAL HEAT IN interlayer along furnace body axis direction be equipped with several pieces of deflectors, the two sides of every piece of deflector respectively with outer housing and Inner housing is connected, and airflow channel is formed between adjacent baffle.

4. a kind of energy-saving efficient sintering according to claim 3, pelletizing denitrating flue gas afterburning furnace, which is characterized in that The communication port for being connected to neighboring gas flow path is equipped on deflector.

5. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that The ceramic fiber blanket and light mullite pouring material that the front end wall is set gradually by ecto-entad are combined.

6. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that The ceramic fiber blanket and ceramic fibre pouring material or light weight alumina that the side wall of the exhaust pass is set gradually by ecto-entad Brick is combined.

7. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that Several combustion air exports are uniformly opened up along its circumferential direction on front end wall.

8. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that Venting of dust explosion mouth, thermometer hole, pressure tap and manhole used for overhaul are additionally provided on the furnace body.

9. a kind of energy-saving efficient sintering according to claim 1, pelletizing denitrating flue gas afterburning furnace, which is characterized in that The bottom of the furnace body is provided with saddle support.