CN104774652B

CN104774652B - Coal reburner flue gas cleaning system

Info

Publication number: CN104774652B
Application number: CN201510147862.1A
Authority: CN
Inventors: 高麟; 汪涛; 樊彬
Original assignee: Intermet Technology Chengdu Co Ltd
Current assignee: Intermet Technology Chengdu Co Ltd
Priority date: 2015-03-31
Filing date: 2015-03-31
Publication date: 2018-07-20
Anticipated expiration: 2035-03-31
Also published as: CN104774652A

Abstract

The invention discloses a kind of coal reburner flue gas cleaning systems, the system includes coal reburner and is filtered the high temperature air filtration device of purification for the furnace gas to coal conversion outlet of still output, is connected on the furnace gas transfer passage between coal reburner and high temperature air filtration device for injecting the carrier gas feeder being diluted to the free radical in furnace gas into the furnace gas transfer passage.Above-mentioned coal reburner flue gas cleaning system can effectively delay free radical polymerization by injecting the carrier gas being diluted to the free radical in furnace gas into furnace gas before filtration to reduce number of free radical, help avoid filter element quickly by paste fouling membrane.

Description

Coal reburner flue gas cleaning system

Applicant of the present invention had submitted on January 30th, 2015 application No. is 2015100507824, title " coal turn The application for a patent for invention of change stove flue gas cleaning method ".A variety of coal reburner furnace gases are provided in the specification of the earlier application Purification method and system, may there are technical associations with the application.Due to earlier application the application the applying date not yet It is open, therefore the contents being related in the earlier application in the following the description of this specification, so that the public is reading the application text. more When part can more fully, have a clear understanding of this coal reburner flue gas cleaning technology.

Technical field

The present invention relates to coal reburner flue gas cleaning technologies, and in particular to coal reburner flue gas cleaning method and coal Reburner flue gas cleaning system.Described " coal reburner furnace gas " especially includes coal gasification furnace furnace gas and coal gas retort stove Gas.

Background technology

It is restricted by coal reburner furnace gas physics itself and chemical property, under existing technical conditions, in order to reach Gaseous product cleaning, the efficient utilization being converted into coal, feasible method are to take to carry out coal reburner furnace gas The technology path of high temperature purification.And can realize that the means of gas high temperature purification are limited at present, mainly there are mechanical dedusting method, electricity Dedusting method and gas high temperature filtration dedusting method.Dust removal with machine mode (such as gravitational precipitator, cyclone dust collectors) efficiency of dust collection It is low；Electric precipitation mode is of high cost, energy consumption is big, and efficiency of dust collection is also not satisfactory；Gas high temperature filtration dedusting method efficiency of dust collection It is very high, it is technically more satisfactory selection.The realization of gas high temperature filtration dedusting method is filled using high temperature air filtration Set, be equipped in high temperature air filtration device can heat safe high-precision filtration element, as sintering diamond bit crosses filtering element Part or sintering ceramic porous material filter element, the filtering accuracy of these filter elements can be waited for according in coal reburner furnace gas The size of dust is filtered by adjusting the aperture of porous material to ensure.Although high temperature air filtration device has high dust collection efficiency Advantage, but still suffer from a critical issue when filtering coal reburner furnace gas, i.e., how to ensure filter element when longer Interior effective work.

In the past when filtering coal reburner furnace gas to promote the effective time of filter element, solution is nothing more than Two aspects.The solution of wherein one side is to develop more efficiently filter element regeneration, such as to High Temperature Gas Some substances are injected in body filter device makes it be reacted under certain condition with the tamper in filter element, reaches to mistake The regenerated purpose of filtering element.Certainly, can be parallel with various ways to the regeneration of filter element, such as by traditional pulse cleaning With above-mentioned reaction regeneration to combination.The solution of another aspect is in the booting of high temperature air filtration device, shutdown process It is passed through high temperature protection gas (such as nitrogen) into high temperature air filtration device and carries out high temperature preheating or displacement, to prevent filtering element Part surface sweating.A kind of filter core (filter element) is disclosed in the Chinese invention patent application file of publication number CN103961954A Regeneration method, which employs be passed through Poor oxygen gas into high temperature air filtration device to be fired with the flammable dirt adhered on filter core It burns to realize the regenerated purpose of filter core, but this mode pertains only to the regeneration of filter core, does not consider how fundamentally to drop The risk that low filter core blocks.

Invention content

Technical problem to be solved by the invention is to provide novel coal reburner flue gas cleaning methods and coal to convert Stove flue gas cleaning system, in order to carry out gas solid separation purification to coal reburner furnace gas.

The coal reburner flue gas cleaning method of the present invention, includes that the furnace gas that coal reburner generates is sent to High Temperature Gas Body filter device is filtered the link of purification, and the high temperature air filtration device is located at outside coal reburner or is incorporated into coal In charcoal reburner；When high temperature air filtration device is located at outside coal reburner, by high temperature air filtration device gas to be filtered Body import is maintained at compared to the downward amplitude of fluctuation of the furnace gas temperature of coal reburner furnace gas export in the range of 0~50 DEG C, and And by furnace gas by when the filter element of high temperature air filtration device compared to the furnace gas temperature of coal reburner furnace gas export Downward amplitude of fluctuation is maintained in the range of 0~80 DEG C；When the high temperature air filtration device is incorporated into coal reburner, Make since coal reburner generates furnace gas up to furnace gas has been occurred by the process of the filter element of high temperature air filtration device Inside coal reburner.

In the above method, when high temperature air filtration device is located at outside coal reburner, high temperature air filtration device waits for Filtering gas feed can also be further defined to protect compared to the downward amplitude of fluctuation of the furnace gas temperature of coal reburner furnace gas export It holds in the range of 0~30 DEG C, also, furnace gas is by comparing coal reburner when the filter element of high temperature air filtration device The downward amplitude of fluctuation of the furnace gas temperature of furnace gas export can be further defined to be maintained in the range of 0~50 DEG C.It is basic herein On, the high temperature air filtration device gas feed to be filtered passes through the filter element of high temperature air filtration device compared to furnace gas When the variable quantity of furnace gas temperature can be further defined to -100 DEG C~+20 DEG C, be further limited to -50 DEG C~+10 DEG C.

It may be noted that the gas feed to be filtered of the above high temperature gas-filtering device has passed through High Temperature Gas compared to furnace gas The variable quantity of furnace gas temperature when the filter element of body filter device is -100 DEG C (or -50 DEG C), indicates that furnace gas has passed through high temperature Temperature when temperature when the filter element of gas-filtering device enters high temperature air filtration device than furnace gas improves 100 DEG C (or 50 DEG C)；Conversely, the gas feed to be filtered of high temperature air filtration device passes through high temperature air filtration device compared to furnace gas The variable quantity of furnace gas temperature when filter element is+20 DEG C (or+10 DEG C), indicates that furnace gas passes through high temperature air filtration device Temperature when temperature when filter element enters high temperature air filtration device than furnace gas reduces 20 DEG C (or 10 DEG C).

In the above method, when the high temperature air filtration device is located at outside coal reburner, go out from coal reburner Mouth output furnace gas starts until furnace gas can also include by coal by the process after the filter element of high temperature air filtration device The furnace gas of charcoal conversion outlet of still output, which is first sent to after pre-dedusting device carries out preliminary solid and gas separation, enters back into high temperature air filtration The link of device row filtration, purification.Certainly, the above method can not also contain recited above preliminary by pre-dedusting device progress The link of solid and gas separation, to make the furnace gas of coal conversion outlet of still output be directly entered high temperature air filtration device.

No matter in the above method whether containing the link for carrying out preliminary solid and gas separation by pre-dedusting device, this method all may be used Be further improved for：Up to furnace gas passes through the filtering of high temperature air filtration device since coal conversion outlet of still output furnace gas During element, in the range of the downward amplitude of fluctuation of the furnace gas temperature is maintained at no more than 80 DEG C.On this basis, This method is since coal conversion outlet of still output furnace gas up to furnace gas passes through the filter element of high temperature air filtration device In the process, the downward amplitude of fluctuation of the furnace gas temperature can be further defined to be maintained at no more than 50 DEG C, 30 DEG C or 20 DEG C In range.

Further, this method converts outlet of still exports furnace gas since coal up to furnace gas passes through high-temperature gas mistake During filtering after the filter element of device, the furnace gas temperature is made not reduce.Further, defeated from coal conversion outlet of still Go out furnace gas to start until furnace gas is by becoming during after the filter element of high temperature air filtration device, the furnace gas temperature Dynamic amplitude is 0~100 DEG C.Further, up to furnace gas has passed through High Temperature Gas since coal conversion outlet of still output furnace gas During after the filter element of body filter device, the furnace gas temperature is made to gradually rise.

In the above-mentioned each method of the present invention, the coal reburner is primarily referred to as coal gasification furnace or coal gas retort. On this basis, the coal reburner is the coal destructive distillation for implementing Coal at Low Temperature distillation process or coal medium temperature carbonization technique Stove.Further, the coal reburner is the coal gas retort for implementing Coal at Low Temperature distillation process, and the high-temperature gas The furnace gas temperature of filter device gas feed to be filtered is 400~550 DEG C.For current high temperature air filtration device, mistake The Coal at Low Temperature gas retort furnace gas filtered in above-mentioned temperature range is that comparison is suitable.

In the above-mentioned each method of the present invention, except to mainly to the corresponding control of temperature in addition to, can also further will be from coal turn Change stove generation furnace gas to start until furnace gas is by the process control of the filter element of high temperature air filtration device within 15 seconds. Further also it will can pass through the filtering of high temperature air filtration device up to furnace gas since coal reburner generates furnace gas The process control of element is within 10 seconds.Certainly, High Temperature Gas will have been passed through up to furnace gas since coal reburner generates furnace gas The process control of the filter element of body filter device within 8 seconds, 6 seconds or 5 seconds more preferably.

Many kinds of substance is usually contained in coal reburner furnace gas, the physical aspect (gaseous state, liquid, solid-state) of these substances is each Different, chemical composition is also more complicated, therefore coal reburner furnace gas is there are very strong physical instability and chemical instability, It is especially the most typical with coal gas retort furnace gas.Applicant by the Filtration Filtration to blocking analyze etc. the study found that on It states the reason is that flue gas cleaning the problem especially blocking of high temperature air filtration device filter element and coal is caused to be converted into An important factor for the problems such as utilization rate of gaseous product is limited.High temperature air filtration is filled in above-mentioned various methods through the invention Out temperature when setting work, since coal conversion outlet of still output furnace gas during the entire process of furnace gas is filtered stove The restriction or these above-mentioned factors and stove of gas temperature change or coal reburner with the position relationship of high temperature air filtration device Gas generates the combination until the time filtered, and can preferably avoid the physical instability and chemistry of coal reburner furnace gas Unstability fundamentally extends filter element quilt to the adverse effect of flue gas cleaning process especially high temperature filtration purification process Usage time before blocking.

In order to implement or preferably implement some above-mentioned coal reburner flue gas cleaning methods, the present invention also provides following A variety of coal reburner flue gas cleaning systems.The first coal reburner flue gas cleaning system include coal reburner and for pair The furnace gas of coal conversion outlet of still output is filtered the high temperature air filtration device of purification, is converted from the coal in the system The furnace gas export of stove is until this part of high temperature air filtration device constitutes a furnace gas heating and thermal insulation flow path on the whole.Its In, the furnace gas heating and thermal insulation flow path, which is specifically one, can be such that furnace gas is converted outlet of still exports since coal up to having led to The downward amplitude of fluctuation for crossing its furnace gas temperature during the filter element of high-temperature gas filter device is maintained at no more than 80 DEG C Furnace gas heating and thermal insulation flow path in the range of (being preferably no more than 50 DEG C, 30 or 20 DEG C).

A kind of concrete structure of the first coal reburner flue gas cleaning system is the coal reburner and high-temperature gas It is additionally provided with pre-dedusting device between filter device, the furnace gas export of coal reburner and pre-dedusting device wait for dedusting gas feed Connection, the gas vent of dedusting of pre-dedusting device are connected to the gas feed to be filtered of high temperature air filtration device, the coal It is sequentially connected and is integrated before and after the shell of charcoal reburner, pre-dedusting device and high temperature air filtration device three, pre-dedusting device Wait for that furnace gas export of the dedusting gas feed close to coal reburner, the gas feed to be filtered of high temperature air filtration device are close The dedusting gas vent of pre-dedusting device；It is equipped with heating and thermal insulation structure on pre-dedusting device and high temperature air filtration device.

The first more specific structure of coal reburner flue gas cleaning system is the dedusting gas of the pre-dedusting device Outlet is positioned at the top of the pre-dedusting device, and the gas feed to be filtered of high temperature air filtration device is higher than pre-dedusting device Dedusting gas vent is simultaneously connect between the gas vent of dedusting of pre-dedusting device by elbow；In high temperature air filtration device The mounting height of filter element is higher than the gas feed to be filtered of high temperature air filtration device.

The first more specific structure of coal reburner flue gas cleaning system is the pre-dedusting device and high-temperature gas mistake It filters and is mounted on heating and thermal insulation sheath body on the shell of device, heating and thermal insulation sheath body is filled with pre-dedusting device and high temperature air filtration It is heat medium transfer passage between the shell set, the heat medium transfer passage is connect with heat medium source.

The first more specific structure of coal reburner flue gas cleaning system is that the pre-dedusting device specifically uses machine Tool deduster.For example, the pre-dedusting device specifically use cyclone dust collectors, gravitational precipitator or cyclone dust collectors with again The combination of inertia force precipitator.

The first more specific structure of coal reburner flue gas cleaning system is that the high temperature air filtration device is using burning Tie metal polyporous material filter element or sintering ceramic porous material filter element.For example, the high temperature air filtration device is adopted The sintering intermetallic Fe-Al compound porous material filter element being had excellent performance with applied at elevated temperature.

The first more specific structure of coal reburner flue gas cleaning system is that the coal reburner specifically refers to coal Gasification furnace or coal gas retort.Further, the coal reburner is specially to implement in Coal at Low Temperature distillation process or coal The coal gas retort of warm distillation process.

The first more specific structure of coal reburner flue gas cleaning system is, from the coal reburner in the system Furnace gas export is until this part of high temperature air filtration device constitutes one on the whole and furnace gas can be made to go out from coal reburner Mouthful output start until by the filter element of high temperature air filtration device during the furnace gas that does not reduce of its furnace gas temperature Heating and thermal insulation flow path.

The first more specific structure of coal reburner flue gas cleaning system is, from the stove of the coal reburner in system Gas outlet can make furnace gas convert outlet of still from coal until this part of high temperature air filtration device constitutes one on the whole Output start until by the filter element of high temperature air filtration device during the furnace gas that gradually rises of its furnace gas temperature Heating and thermal insulation flow path.

It can be to since coal converts outlet of still output furnace gas by the first above-mentioned coal reburner flue gas cleaning system Until furnace gas is controlled by the furnace gas temperature in filtering whole process, the physics of coal reburner furnace gas can be preferably avoided Unstability and chemical instability are to the adverse effect of flue gas cleaning process especially high temperature filtration purification process, fundamentally Extend the usage time before filter element is blocked.

In order to implement or preferably implement some above-mentioned coal reburner flue gas cleaning methods, second provided by the invention Coal reburner flue gas cleaning system, including coal reburner and the furnace gas for being generated to coal reburner are filtered purification High temperature air filtration device, the high temperature air filtration device be incorporated into coal reburner and make from coal reburner generate Furnace gas starts until furnace gas is betided by the process of the filter element of high temperature air filtration device inside coal reburner.

Second of more specific structure of coal reburner flue gas cleaning system is that the coal reburner specifically refers to coal Gasification furnace or coal gas retort.Further, the coal reburner is specially to implement in Coal at Low Temperature distillation process or coal The coal gas retort of warm distillation process.

Second of more specific structure of coal reburner flue gas cleaning system is that the filter element is that sintering metal is porous Filtration of material element or sintering ceramic porous material filter element.For example, the high temperature air filtration device uses applied at elevated temperature The sintering intermetallic Fe-Al compound porous material filter element haveing excellent performance.

Second of more specific structure of coal reburner flue gas cleaning system is that the coal reburner includes being connected each other Upper furnace body and lower furnace body, the lower furnace body be vertical heater, coal conversion be happened in lower furnace body, the furnace chamber of the upper furnace body is inclined Furnace chamber from lower furnace body；The high temperature air filtration device is set in the furnace chamber of upper furnace body, and the outside of upper furnace body is equipped with and height The exhaust structure of air filtration body outlet conducting is already expired in warm gas-filtering device.

Second of more specific structure of coal reburner flue gas cleaning system is high temperature air filtration device interval peace On furnace wall loaded on upper furnace body, the outside of upper furnace body is equipped with exhaust clamshell, and the air filtration body that is already expired of each high temperature air filtration device goes out Mouth passes through the furnace wall of upper furnace body to be connected with exhaust clamshell.

Second of more specific structure of coal reburner flue gas cleaning system is that the coal reburner includes inner hollow Rotatable furnace body and with rotatable furnace body be sequentially connected rotary motion mechanism；The high temperature air filtration device is set to In the furnace chamber of rotatable furnace body, the outside of rotatable furnace body is equipped with is already expired air filtration body outlet conducting with high temperature air filtration device Exhaust structure.

Second of more specific structure of coal reburner flue gas cleaning system is high temperature air filtration device interval peace On furnace wall loaded on rotatable furnace body, the outside of rotatable furnace body is equipped with exhaust clamshell, and each high temperature air filtration device is already expired Filter gas vent passes through the furnace wall of rotatable furnace body to be connected with exhaust clamshell.

Second of more specific structure of coal reburner flue gas cleaning system is the filtering of the high temperature air filtration device Element is axially disposed within along rotatable furnace body in the furnace chamber of rotatable furnace body, and the outside of rotatable furnace body is equipped with exhaust clamshell, The both ends of the filter element are fixed in the furnace chamber of rotatable furnace body and at least one end is by positioning exhaust structure and exit casing Cover conducting.

By above-mentioned second of coal reburner flue gas cleaning system to coal reburner and high temperature air filtration device Position relationship is defined, and the furnace gas that coal reburner generates can be run through under conditions of temperature hardly happens variation High temperature air filtration device is filtered purification, avoids the physical instability of coal reburner furnace gas and chemistry unstable well The qualitative adverse effect to flue gas cleaning process especially high temperature filtration purification process fundamentally extends filter element and is blocked Preceding usage time.

In order to implement or preferably implement some above-mentioned coal reburner flue gas cleaning methods, it is provided by the invention the third Coal reburner flue gas cleaning system, including coal reburner and the furnace gas for coal conversion outlet of still output are filtered The high temperature air filtration device of purification, the front end that the gas feed to be filtered of high temperature air filtration device is located in the system are equipped with stove The hot gas inlet to be added of gas heating device, the furnace gas heating device is connect with coal reburner furnace gas export, furnace gas heating dress The outlet of heat gas set is connect with the gas feed to be filtered of high temperature air filtration device.Wherein, furnace gas heating Specifically a kind of stove for the gas feed to be filtered of high temperature air filtration device to be compared to coal reburner furnace gas export of device The downward amplitude of fluctuation of temperature degree is maintained at the furnace gas heating device in the range of 0~50 DEG C.

The third more specific structure of coal reburner flue gas cleaning system is that the furnace gas heating device is a kind of use In the downward variation by the gas feed to be filtered of high temperature air filtration device compared to the furnace gas temperature of coal reburner furnace gas export Amplitude is maintained at the furnace gas heating device in the range of 0~30 DEG C.

The third more specific structure of coal reburner flue gas cleaning system is that the high temperature air filtration device is equipped with Make the gas feed to be filtered of high temperature air filtration device compared to furnace gas by the filter element of high temperature air filtration device when The heating and thermal insulation structure that the variable quantity of furnace gas temperature is -100 DEG C~+20 DEG C.

The third more specific structure of coal reburner flue gas cleaning system is that the high temperature air filtration device is equipped with Make the gas feed to be filtered of high temperature air filtration device compared to furnace gas by the filter element of high temperature air filtration device when The heating and thermal insulation structure that the variable quantity of furnace gas temperature is -50 DEG C~+10 DEG C.

The third more specific structure of coal reburner flue gas cleaning system is the coal reburner and high-temperature gas mistake It filters and is equipped with pre-dedusting device between device, the furnace gas export of coal reburner and pre-dedusting device wait for that dedusting gas feed connects Logical, the gas vent of dedusting of pre-dedusting device is connected to the gas feed to be filtered of high temperature air filtration device.

The third more specific structure of coal reburner flue gas cleaning system is that the pre-dedusting device specifically uses machine Tool deduster.For example, the pre-dedusting device specifically use cyclone dust collectors, gravitational precipitator or cyclone dust collectors with again The combination of inertia force precipitator.

The third more specific structure of coal reburner flue gas cleaning system is that the high temperature air filtration device is using burning Tie metal polyporous material filter element or sintering ceramic porous material filter element.For example, the high temperature air filtration device is adopted The sintering intermetallic Fe-Al compound porous material filter element being had excellent performance with applied at elevated temperature.

The third more specific structure of coal reburner flue gas cleaning system is that the coal reburner specifically refers to coal Gasification furnace or coal gas retort.Further, the coal reburner is specially to implement in Coal at Low Temperature distillation process or coal The coal gas retort of warm distillation process.

It can will enter height to what is exported from coal reburner by the third above-mentioned coal reburner flue gas cleaning system The furnace gas that warm gas-filtering device is filtered purification is heated, and physical instability and the change of coal reburner furnace gas are reduced Adverse effect of the unstability to flue gas cleaning process especially high temperature filtration purification process is learned, before extension filter element is blocked Usage time.

In addition to above-mentioned three kinds of coal reburner flue gas cleaning system, the present invention will provide the 4th kind of coal reburner further below Flue gas cleaning system.4th kind of coal reburner flue gas cleaning system converts outlet of still using temperature gas dust remover to coal The furnace gas of output is dusted purification.The temperature gas dust remover includes but not limited to temperature gas dust remover.

4th kind of coal reburner flue gas cleaning system includes coal reburner and is exported for converting outlet of still to coal Furnace gas be dusted the gas dust-removing device of purification, from the furnace gas export of the coal reburner up to gas removes in the system This part of dirt device constitutes a furnace gas heating and thermal insulation flow path on the whole.Wherein, furnace gas heating and thermal insulation flow path tool Body, which is one, can be such that furnace gas is converted outlet of still exports up to by the mistake of gas dust-removing device dust separation since coal The downward amplitude of fluctuation of its furnace gas temperature is maintained at no more than the furnace gas heating and thermal insulation flow path within the scope of 80 DEG C in journey.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is, from the coal reburner in the system Furnace gas export can make furnace gas defeated from coal conversion outlet of still until this part of gas dust-removing device constitutes one on the whole Go out to start until by gas dust-removing device dust separation during the downward amplitude of fluctuation of its furnace gas temperature be maintained at not More than the furnace gas heating and thermal insulation flow path within the scope of 50 DEG C, 30 DEG C or 20 DEG C.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is, from the coal reburner in the system Furnace gas export can make furnace gas defeated from coal conversion outlet of still until this part of gas dust-removing device constitutes one on the whole Go out to start until by gas dust-removing device dust separation during the furnace gas heating and thermal insulation stream that does not reduce of its furnace gas temperature Road.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is, from the stove of the coal reburner in system Gas outlet can make furnace gas convert outlet of still output from coal until this part of gas dust-removing device constitutes one on the whole Start until by gas dust-removing device dust separation during the amplitude of fluctuation of furnace gas temperature be 0~100 DEG C of furnace gas Heating and thermal insulation flow path.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is, from the coal reburner in the system Furnace gas export can make furnace gas defeated from coal conversion outlet of still until this part of gas dust-removing device constitutes one on the whole Go out start until by gas dust-removing device dust separation during its furnace gas temperature group gradually rise furnace gas heating protect Warm flow path.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is that the gas dust-removing device is by 1~4 grade What mechanical dust collector was connected in series.Certainly, gas dust-removing device can also be electric precipitator or electric precipitator and mechanical dust collector Combination etc..

The 4th kind of more specific structure of coal reburner flue gas cleaning system is that the machinery in the gas dust-removing device removes Dirt device is cyclone dust collectors and/or gravitational precipitator.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is that the coal reburner specifically refers to coal Gasification furnace or coal gas retort.Further, the coal reburner is specially to implement in Coal at Low Temperature distillation process or coal The coal gas retort of warm distillation process.

The 4th kind of more specific structure of coal reburner flue gas cleaning system is that the system further includes that oil dress is received in furnace gas cooling It sets, which cools down the import of oil-collecting device and the gas vent of dedusting of gas dust-removing device connects.

It can be to since coal converts outlet of still output furnace gas by above-mentioned 4th kind of coal reburner flue gas cleaning system Until furnace gas is controlled by the furnace gas temperature in filtering whole process, the physics of coal reburner furnace gas can be preferably avoided Unstability and chemical instability are conducive to the gaseous product that coal is converted into the adverse effect of flue gas cleaning process More effective utilization.

5th kind of coal reburner flue gas cleaning system provided by the invention includes coal reburner and is used to turn coal The furnace gas for changing outlet of still output is filtered the high temperature air filtration device of purification, is filled in coal reburner and high temperature air filtration It is connected on furnace gas transfer passage between setting for free radical polymerization in the injection inhibition furnace gas into the furnace gas transfer passage The auxiliary agent feedway of polymerization inhibitor and/or retarder.Coal generates a large amount of free radicals when coal reburner high temperature is reacted, these Free radical gradually polymerize after coal reburner is discharged with furnace gas, and filter element is caused surface paste film occur and fail Major reason.Above-mentioned coal reburner flue gas cleaning system can be by the way that into furnace gas, injection prevents free radical polymerization before filtration Polymerization inhibitor and/or the retarder for delaying polymerization time help avoid to reduce influence of the free radical polymerization to high temperature filtration Filter element is quickly by paste fouling membrane.Polymerization inhibitor, retarder are available there are many in the prior art and use, and are helped in the present invention Agent feeding device be specifically as follows it is a kind of for injected into furnace gas transfer passage active ingredient be nitrobenzene, m-nitro, Nitro-chlorobenzene, trinitrobenzen, hydroquinone, resorcinol, 2,2- diphenyl -1- trinitrophenyl-hydrazines, 1,4-benzoquinone, durol Any one or a few auxiliary agent feedway in quinone, 2- methyl -2- nitromethanes, phenyl-N- tert-butylnitrones.It is above-mentioned Polymerization inhibitor and/or retarder addition are generally the 0.1~5% of furnace gas integral molar quantity to be filtered.

In 5th kind of coal reburner flue gas cleaning system, between the coal reburner and high temperature air filtration device also Pre-dedusting device can be set, and the furnace gas export of coal reburner waits for that dedusting gas feed is connected to pre-dedusting device, pre- dedusting The gas vent of dedusting of device is connected to the gas feed to be filtered of high temperature air filtration device；The auxiliary agent feedway Auxiliary agent output end is connected on the furnace gas transfer passage between pre-dedusting device and high temperature air filtration device.The pre- dedusting Mechanical dust collector specifically can be used in device.After the dustiness for reducing furnace gas by pre-dedusting device, then inhibition is injected into furnace gas Polymerization inhibitor and/or retarder contact more abundant with the free radical in furnace gas when agent and/or retarder, therefore using effect is more preferable.

The 5th kind of more specific structure of coal reburner flue gas cleaning system is that the auxiliary agent feedway includes that auxiliary agent is molten Flow container, the outlet of the NaOH solution tank NaOH connect the entrance of syringe pump by pipeline, and the outlet of syringe pump is defeated by pipeline connection furnace gas Send channel.Above-mentioned this auxiliary agent feedway of stating can preferably ensure polymerization inhibitor and/or retarder and the free radical in furnace gas Contact uniformity.

Similarly, in the 5th kind of coal reburner flue gas cleaning system, from the furnace gas export of the coal reburner up to height This part of warm gas-filtering device also may make up one on the whole can make furnace gas since coal conversion outlet of still output Until by the filter element of high temperature air filtration device during the downward amplitude of fluctuation of its furnace gas temperature be maintained at not More than the furnace gas heating and thermal insulation flow path in the range of 80 DEG C.Further, go out from the furnace gas of the coal reburner in the system Mouth can be such that furnace gas is exported from coal conversion outlet of still until this part of high temperature air filtration device constitutes one on the whole Start until by the filter element of high temperature air filtration device during its furnace gas temperature do not reduce furnace gas heating protect Warm flow path.

Similarly, high temperature air filtration device described in the 5th kind of coal reburner flue gas cleaning system is more using sintering metal Porous materials filter element or sintering ceramic porous material filter element.In addition, the coal reburner specifically refers to Coal Gasification Stove or coal gas retort more specifically implement Coal at Low Temperature distillation process or the coal gas retort of coal medium temperature carbonization technique.

6th kind of coal reburner flue gas cleaning system provided by the invention includes coal reburner and is used to turn coal The furnace gas for changing outlet of still output is filtered the high temperature air filtration device of purification, is filled in coal reburner and high temperature air filtration It is connected on furnace gas transfer passage between setting dilute to the free radical progress in furnace gas for being injected into the furnace gas transfer passage The carrier gas feeder released.Coal generates a large amount of free radicals when coal reburner high temperature is reacted, these free radicals are with furnace gas Gradually it polymerize after discharge coal reburner, and causes filter element surface occur and paste film and the major reason that fails.On Stating coal reburner flue gas cleaning system can be by the way that into furnace gas, injection is diluted the free radical in furnace gas before filtration Carrier gas can effectively delay free radical polymerization to reduce number of free radical, and it is quickly dirty by paste film to help avoid filter element Dye.The volume ratio general control of above-mentioned carrier gas and furnace gas to be diluted is in 10% or more, preferably 10~30%；Carrier gas and stove The temperature of gaseous mixture generally not less than 380 DEG C (ideal is to be not less than 400~500 DEG C or higher) after gas mixing.

The carrier gas is preferably one or more of high temperature super heated steam, high temperature carbon dioxide, high temperature carbon monoxide, These types of carrier gas can not only play diluting effect, in addition can also prevent furnace gas from analysing C, kill two birds with one stone, preferably prevent from filtering Element blocks.The carrier gas can also be by the purified gas of coal reburner flue gas cleaning system, such as：High temperature Gas-filtering device, which is one, to control the dust content in furnace gas 10 to 20mg/Nm³Gas-filtering device below is high The filter gas vent that is already expired of warm gas-filtering device is connect with the entrance of furnace gas cooling oil recovery system, and oil system is received in the furnace gas cooling System includes that at least two-stage furnace gas Oil injection cooling receives oily unit, and furnace gas Oil injection coolings at different levels receive what oily unit was generated using furnace gas cooling Fluid is that cooling medium carries out spraying cooling to follow-up furnace gas and recycled to cooling obtained fluid, the furnace gas sprays at different levels It includes washing oil tower, oil storage tank, oil transfer pump and oil cooler, inlet end and the exhaust end series connection of the washing oil tower that oily unit is but received in oil cooling In on the furnace gas operation flow path of entire coal liquifaction system, the oil inlet end of the oil storage tank connects with the oil extraction end of corresponding washing oil tower bottom It connects, the oil transfer pump and oil cooler are connected to form the furnace gas Oil injection cooling and receive the spray of oily unit with corresponding washing oil tower and be followed with fluid Ring supply circuit, the carrier gas are the gas that afterbody furnace gas Oil injection cooling receives oily unit exhaust end discharge；It is dilute to ensure The temperature of outgassing, the gas that afterbody furnace gas Oil injection cooling receives oily unit exhaust end discharge can be by being re-used as diluting after heating Gas enters on the furnace gas transfer passage between coal reburner and high temperature air filtration device.

It is further improved as to above-mentioned 6th kind of coal reburner flue gas cleaning system, in coal reburner and high temperature It is also associated on furnace gas transfer passage between gas-filtering device in the injection inhibition furnace gas into the furnace gas transfer passage The polymerization inhibitor of free radical polymerization and/or the auxiliary agent feedway of retarder.By the way that into furnace gas, injection prevents freely before filtration The polymerization inhibitor of base polymerization and/or the retarder for delaying polymerization time, to reduce influence of the free radical polymerization to high temperature filtration, into One step helps avoid filter element quickly by paste fouling membrane.In the prior art there are many polymerization inhibitor, retarder it is available and It uses, it is nitro that auxiliary agent feedway, which is specifically as follows one kind for injecting active ingredient into furnace gas transfer passage, in the present invention It is benzene, m-nitro, m-chloronitrobenzene, trinitrobenzen, hydroquinone, resorcinol, 2,2- diphenyl -1- trinitrophenyl-hydrazines, right Any one or a few auxiliary agent in benzoquinones, tetramethyl-benzoquinone, 2- methyl -2- nitromethanes, phenyl-N- tert-butylnitrones Feedway.Above-mentioned polymerization inhibitor and/or retarder addition are generally the 0.1~5% of furnace gas integral molar quantity to be filtered.

In 6th kind of coal reburner flue gas cleaning system, between the coal reburner and high temperature air filtration device also Pre-dedusting device can be set, and the furnace gas export of coal reburner waits for that dedusting gas feed is connected to pre-dedusting device, pre- dedusting The gas vent of dedusting of device is connected to the gas feed to be filtered of high temperature air filtration device；The auxiliary agent feedway Auxiliary agent output end is connected on the furnace gas transfer passage between pre-dedusting device and high temperature air filtration device.The pre- dedusting Mechanical dust collector specifically can be used in device.After the dustiness for reducing furnace gas by pre-dedusting device, then inhibition is injected into furnace gas Polymerization inhibitor and/or retarder contact more abundant with the free radical in furnace gas when agent and/or retarder, therefore using effect is more preferable.

The 6th kind of more specific structure of coal reburner flue gas cleaning system is that the auxiliary agent feedway includes that auxiliary agent is molten Flow container, the outlet of the NaOH solution tank NaOH connect the entrance of syringe pump by pipeline, and the outlet of syringe pump is defeated by pipeline connection furnace gas Send channel.Above-mentioned this auxiliary agent feedway of stating can preferably ensure polymerization inhibitor and/or retarder and the free radical in furnace gas Contact uniformity.

Similarly, in the 6th kind of coal reburner flue gas cleaning system, from the furnace gas export of the coal reburner up to height This part of warm gas-filtering device also may make up one on the whole can make furnace gas since coal conversion outlet of still output Until by the filter element of high temperature air filtration device during the downward amplitude of fluctuation of its furnace gas temperature be maintained at not More than the furnace gas heating and thermal insulation flow path in the range of 80 DEG C.Further, go out from the furnace gas of the coal reburner in the system Mouth can be such that furnace gas is exported from coal conversion outlet of still until this part of high temperature air filtration device constitutes one on the whole Start until by the filter element of high temperature air filtration device during its furnace gas temperature do not reduce furnace gas heating protect Warm flow path.

Similarly, high temperature air filtration device described in the 6th kind of coal reburner flue gas cleaning system is more using sintering metal Porous materials filter element or sintering ceramic porous material filter element.In addition, the coal reburner specifically refers to Coal Gasification Stove or coal gas retort more specifically implement Coal at Low Temperature distillation process or the coal gas retort of coal medium temperature carbonization technique.

It is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and advantage will be below Description in the middle part of give out, partly will become apparent from the description below, or practice through the invention is recognized.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of specific implementation mode of coal reburner flue gas cleaning system of the present invention.

Fig. 2 is the structural schematic diagram of coal reburner flue gas cleaning system another kind specific implementation mode of the present invention.

Fig. 3 is the structural schematic diagram of coal reburner flue gas cleaning system another kind specific implementation mode of the present invention.

Fig. 4 is the structural schematic diagram of coal reburner flue gas cleaning system another kind specific implementation mode of the present invention.

Fig. 5 is the structural schematic diagram of coal reburner flue gas cleaning system another kind specific implementation mode of the present invention.

Fig. 6 is the structural schematic diagram of coal reburner flue gas cleaning system another kind specific implementation mode of the present invention.

Fig. 7 is the furnace gas temperature change curve comparison diagram of section Example of the present invention.

The structural schematic diagram of Fig. 8 coal reburner flue gas cleaning system another kind specific implementation modes of the present invention.

The structural schematic diagram of Fig. 9 coal reburner flue gas cleaning system another kind specific implementation modes of the present invention.

The structural schematic diagram of Figure 10 coal reburner flue gas cleaning system another kind specific implementation modes of the present invention.

Specific implementation mode

Present embodiment part is unified to be converted the coal of the present invention by taking the purification of coal gas retort furnace gas as an example Stove flue gas cleaning method and system is specifically described.Current coal distillation process be generally divided into Coal at Low Temperature distillation process, Coal medium temperature carbonization technique and coal high-temperature retorting technique, purification techniques of the invention are suitable to above-mentioned three kinds of coal distillation process With, but will be illustrated by taking the flue gas cleaning of Coal at Low Temperature distillation process as an example in this embodiment.

Certain Coal at Low Temperature gas retort furnace gas export exports about 480~550 DEG C of high-temperature furnace gas (destructive distillation product), the high temperature furnace Contain gas, liquid and solid matter in gas, wherein gaseous matter is mainly coal gas, and liquid substance is mainly coal tar, solid Substance is mainly Al₂O₃Powder, SiO₂The dust such as powder, C powder.Above-mentioned high-temperature furnace gas has very strong physical instability and chemistry not Stability, the substance being mainly reflected in furnace gas not only occur to be pyrolyzed but also while hot polymerization occur.The study found that when furnace gas temperature is gradual Phenomena such as when reduction, hot polymerization will be gradually notable, and analysis C, coking, dust viscosity become larger in furnace gas more becomes apparent.

In view of this, as shown in Fig. 1~2,4~6, this invention takes following methods are net to above-mentioned furnace gas progress high temperature Change.This method includes that the furnace gas that coal reburner 100 (referring specifically to coal gas retort) generates is sent to high temperature air filtration dress 300 links for being filtered purification are set, the high temperature air filtration device 300 is located at 100 outside of coal reburner or is incorporated into In coal reburner 100；When the high temperature air filtration device 300 is located at coal 100 outside of reburner, by high-temperature gas mistake The downward amplitude of fluctuation that 300 gas feed to be filtered of device is filtered compared to the furnace gas temperature of 100 furnace gas export of coal reburner is kept In the range of 0~50 DEG C, and by furnace gas by comparing coal when the filter element 310 of high temperature air filtration device 300 The downward amplitude of fluctuation of the furnace gas temperature of 100 furnace gas export of reburner is maintained in the range of 0~80 DEG C；When the high-temperature gas When filter device 300 is incorporated into coal reburner 100, make since coal reburner 100 generates furnace gas up to furnace gas has led to The process for crossing the filter element 310 of high-temperature gas filter device 300 betides inside coal reburner 100.

In the above method, when high temperature air filtration device 300 is located at coal 100 outside of reburner, high temperature air filtration 300 gas feed to be filtered of device can also be into compared to the downward amplitude of fluctuation of the furnace gas temperature of 100 furnace gas export of coal reburner One step is limited to be maintained in the range of 0~30 DEG C, and furnace gas passes through the filter element 310 of high temperature air filtration device 300 When can be further defined to be maintained at 0~50 compared to the downward amplitude of fluctuation of the furnace gas temperature of 100 furnace gas export of coal reburner In the range of DEG C.On this basis, 300 gas feed to be filtered of the high temperature air filtration device has passed through high temperature compared to furnace gas The variable quantity of furnace gas temperature when the filter element 310 of gas-filtering device 300 can be further defined to -100 DEG C~+20 DEG C, Further it is limited to -50 DEG C~+10 DEG C.Further, up to furnace gas since coal reburner 100 exports output furnace gas By the filter element 310 of high temperature air filtration device 300 during, the downward amplitude of fluctuation of the furnace gas temperature is protected It holds in the range of no more than 80 DEG C, in the range of being more preferably held in no more than 50 DEG C, 30 DEG C or 20 DEG C.

In the above method, when the high temperature air filtration device 300 is located at coal 100 outside of reburner, turn from coal Change the outlet of stove 100 output furnace gas to start until furnace gas is by the process after the filter element 310 of high temperature air filtration device 300 General further includes that the furnace gas of the outlet of coal reburner 100 output is first sent to pre-dedusting device 200 to carry out preliminary solid and gas separation The link of 300 row filtration, purification of high temperature air filtration device is entered back into afterwards.Pre-dedusting device 200 generally uses mechanical dust collector, Such as the combination of cyclone dust collectors or gravitational precipitator or cyclone dust collectors and gravitational precipitator.

The furnace gas temperature of 300 gas feed to be filtered of high temperature air filtration device can be by high temperature air filtration device Mounting temperature sensor is detected in 300 gas feeds to be filtered.Furnace gas passes through the mistake of high temperature air filtration device 300 Furnace gas temperature when filtering element 310 refers to entering high temperature air filtration device 300 after filtered furnace gas passes through filter element 310 The temperature of net gas side, generally can be by being already expired mounting temperature sensor in filter gas vent in high temperature air filtration device 300 It is detected.Likewise, pre-dedusting device 200 waits for that the temperature of dedusting gas feed can be by installing temperature sensing in the import Device is detected, and the temperature of the dedusting gas vent of pre-dedusting device 200 can pass through the mounting temperature sensor in the outlet To be detected；The furnace gas temperature of 100 furnace gas export of coal reburner can by the outlet mounting temperature sensor come into Row detection.

Embodiment 1

As shown in Figure 1, coal reburner flue gas cleaning system includes coal reburner 100 and is used for coal reburner The furnace gases of 100 outlet outputs are filtered the high temperature air filtration device 300 of purification, from the coal reburner in the system 100 furnace gas export can make furnace gas from coal until this part of high temperature air filtration device 300 constitutes one on the whole Reburner 100 outlet output start until by the filter element 310 of high temperature air filtration device 300 during its furnace gas The downward amplitude of fluctuation of temperature is maintained at no more than the furnace gas heating and thermal insulation flow path in the range of 80 DEG C.Specifically, the coal Pre-dedusting device 200, the furnace gas export of coal reburner 100 are equipped between charcoal reburner 100 and high temperature air filtration device 300 Wait for that dedusting gas feed is connected to pre-dedusting device 200, the gas vent of dedusting and the high-temperature gas mistake of pre-dedusting device 200 Filter the gas feed to be filtered connection of device 300, the coal reburner 100, pre-dedusting device 200 and high temperature air filtration dress It sets to be sequentially connected before and after the shell of 300 threes and be integrated, pre-dedusting device 200 waits for dedusting gas feed close to coal reburner The gas feed to be filtered of 100 furnace gas export, high temperature air filtration device 300 has removed dust and gas close to pre-dedusting device 200 Body exports；It is equipped with heating and thermal insulation structure 400 on pre-dedusting device 200 and high temperature air filtration device 300.Since coal being turned Change stove 100,300 three of pre-dedusting device 200 and high temperature air filtration device shell before and after be sequentially connected and be integrated, pre- dedusting Device 200 waits for that furnace gas export of the dedusting gas feed close to coal reburner 100, high temperature air filtration device 300 waited for Filter dedusting gas vent of the gas feed close to pre-dedusting device 200, therefore, coal reburner 100, pre-dedusting device 200 The distance between 300 three of high temperature air filtration device is very short, shortens furnace gas accordingly and enters in advance from coal reburner 100 The time of high temperature air filtration device 300 is entered back into after dust-extraction unit 200, also just reduces the temperature of furnace gas in this process Degree loss；It, can be with due to being equipped with heating and thermal insulation structure 400 on pre-dedusting device 200 and high temperature air filtration device 300 To furnace gas therein carry out heating and thermal insulation, so as to make furnace gas since coal reburner 100 outlet output up to having passed through height The downward amplitude of fluctuation of its furnace gas temperature is maintained at no more than 80 during the filter element 310 of warm gas-filtering device 300 In the range of DEG C.

The specific position of the gas vent of dedusting of the pre-dedusting device 200 of the coal reburner flue gas cleaning system of embodiment 1 In the top of the pre-dedusting device 200, the gas feed to be filtered of high temperature air filtration device 300 is higher than pre-dedusting device 200 The gas vent of dedusting and connect by elbow 320 between the gas vent of dedusting of pre-dedusting device 200；High-temperature gas The mounting height of filter element 310 is higher than the gas feed to be filtered of high temperature air filtration device 300 in filter device 300.It adopts With above-mentioned design, it can further shorten furnace gas and enter back into High Temperature Gas after entering pre-dedusting device 200 from coal reburner 100 The transmitting range of body filter device 300.In addition, the concrete structure as above-mentioned heating and thermal insulation structure 400, the pre-dedusting device 200 and high temperature air filtration device 300 shell on be mounted on heating and thermal insulation sheath body 410, heating and thermal insulation sheath body 410 with remove in advance It is heat medium transfer passage 420, the heat medium between the shell of dirt device 200 and high temperature air filtration device 300 Transfer passage 420 is connect with heat medium source.It is heat medium that heat medium source, which generally uses combustion furnace, generation high-temperature flue gas, Heat medium enters heat medium transfer passage 420, inside to pre-dedusting device 200 and high temperature air filtration device 300 Carry out heating and thermal insulation.Above-mentioned pre-dedusting device 200 uses mechanical dust collector, specially cyclone dust collectors.High temperature air filtration fills 300 filter elements 310 using tubulose are set, which is specially to be sintered intermetallic Fe-Al compound porous material mistake Filtering element；Inside high temperature air filtration device 300, the filter element 310 is mounted on orifice plate, high temperature air filtration device It is air-purifying chamber to be located in 300 above orifice plate, is Primordial Qi room below orifice plate, the gas to be filtered of high temperature air filtration device 300 into Mouthful it is located at the side of air-purifying chamber, filter gas vent is already expired and is located at Primordial Qi room side, air-purifying chamber is equipped with Wen's anti-blowpipe 320 and instead Tracheae 330 is blown into, the bottom of Primordial Qi room is equipped with taper ash collecting box, and the bottom of taper ash collecting box is equipped with ash-discharging device.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 1 is：The outlet of coal reburner 100 output Furnace gas (510 DEG C of mean temperature) be first sent to after pre-dedusting device 200 carries out preliminary solid and gas separation and enter back into high-temperature gas mistake Filter device 300 is filtered purification, and furnace gas 700 enters the Primordial Qi of high temperature air filtration device 300 by gas feed to be filtered In room, then by after the filtering of filter element 310 enter orifice plate above air-purifying chamber, finally from be already expired filter gas vent discharge Link, furnace gas dustiness≤10mg/ that filter gas vent discharge is already expired of high temperature air filtration device 300 are recycled into furnace gas Nm³, and in the operational process of high temperature air filtration device 300, started every 600 seconds back-blowing dust removing device by blowback into Tracheae 330 and Wen's anti-blowpipe 320 carry out pulse backblowing deashing to filter element, and blowback atmospheric pressure is 0.8MPa, blowback temperature Degree is 400 DEG C；Meanwhile by combustion furnace to the heating and thermal insulation sheath body of pre-dedusting device 200 and high temperature air filtration device 300 Heat medium transfer passage 420 in 410 injects 500 DEG C or so of high-temperature flue gas, to pre-dedusting device 200 and High Temperature Gas Furnace gas 700 in body filter device 300 carries out heating and thermal insulation.Through surveying, pre-dedusting device 200 waits for the average furnace of dedusting gas feed Temperature degree be 508 DEG C, pre-dedusting device 200 dedusting gas vent average furnace gas temperature be 492 DEG C, high temperature air filtration dress The average furnace gas temperature for setting 300 gas feed to be filtered is 490 DEG C, and the air filtration body that is already expired of high temperature air filtration device 300 goes out Mouthful average furnace gas temperature be 485 DEG C, up to furnace gas is from high temperature air filtration device since coal reburner 100 generates furnace gas The 300 filter gas vent output average time that is already expired is 6.3 seconds.In a manner described by after system continuous operation 72 hours, take out Filter element 310 simultaneously tests its filtration flux, and test result is as shown in table 1 (referring to table 1).

Embodiment 2

Embodiment 2 takes coal reburner flue gas cleaning system and working method same as Example 1, but difference lies in The temperature being already expired in air filtration body exit procedure is exported to high-temperature gas filter device 300 from the outlet of coal reburner 100 to furnace gas 700 In degree control.Through surveying, pre-dedusting device 200 waits for that the average furnace gas temperature of dedusting gas feed is 512 DEG C, pre-dedusting device 200 The average furnace gas temperature of dedusting gas vent is 526 DEG C, and the gas feed to be filtered of high temperature air filtration device 300 is averaged Furnace gas temperature is 528 DEG C, and the average furnace gas temperature that filter gas vent is already expired of high temperature air filtration device 300 is 540 DEG C, from coal Charcoal reburner 100 generates furnace gas and starts until the output of filter gas vent is already expired averagely from high temperature air filtration device 300 in furnace gas Time is 6.4 seconds.After system continuous operation 72 hours, filter element 310 will be taken out in a manner described and tests its filtration flux, Test result is as shown in table 1 (referring to table 1).

Embodiment 3

As shown in Fig. 2, being equipped with pre-dedusting device 200, coal between coal reburner 100 and high temperature air filtration device 300 The furnace gas export of charcoal reburner 100 waits for that dedusting gas feed is connected to pre-dedusting device 200, and pre-dedusting device 200 has removed Dirt gas vent is connected to the gas feed to be filtered of high temperature air filtration device 300, the coal reburner 100 and pre- dedusting Connected respectively by longer pipeline between device 200 and between pre-dedusting device 200 and high temperature air filtration device 300 It connects, in addition, being equipped with furnace gas heating device positioned at the front end of 300 gas feed to be filtered of high temperature air filtration device in the system 500, the hot gas inlet to be added of the furnace gas heating device 500 is connect with the gas vent of dedusting of pre-dedusting device 200, furnace gas The outlet of heat gas of heating device 500 is connect with the gas feed to be filtered of high temperature air filtration device 300.Wherein, stove Gas heating device 500 specifically uses Electric heating.The pre-dedusting device 200 and high temperature air filtration device 300 it is interior Portion's structure is same as Example 1, but without using the heating and thermal insulation structure 400 in embodiment 1, and is only in high temperature air filtration The enclosure interior of device 300 is equipped with insulating layer.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 3 is：The outlet of coal reburner 100 output Furnace gas 700 (515 DEG C of mean temperature) be first sent to after pre-dedusting device 200 carries out preliminary solid and gas separation and heated again by furnace gas Device 500 is heated, and the furnace gas 700 after heating enters the original of high temperature air filtration device 300 by gas feed to be filtered In gas chamber, then by after the filtering of filter element 310 enter orifice plate above air-purifying chamber, finally from be already expired filter gas vent row Go out to enter furnace gas segmentation recycling link, furnace gas dustiness≤10mg/Nm of filter gas vent discharge is already expired³, and in High Temperature Gas In the operational process of body filter device 300, equally started back-blowing dust removing device every 600 seconds and pass through blowback air inlet pipe 330 and text Family name's anti-blowpipe 320 carries out pulse backblowing deashing to filter element, and blowback atmospheric pressure is 0.8MPa, blowback air temperature is 400 DEG C.Through It surveys, pre-dedusting device 200 waits for that the average furnace gas temperature of dedusting gas feed is 485 DEG C, the dedusting gas of pre-dedusting device 200 The average furnace gas temperature of outlet is 456 DEG C, and the average furnace gas temperature of the gas feed to be filtered of high temperature air filtration device 300 is 505 DEG C, the average furnace gas temperature that filter gas vent is already expired of high temperature air filtration device 300 is 482 DEG C, from coal reburner 100 generation furnace gases start until furnace gas is from the filter gas vent output average time that is already expired of high temperature air filtration device 300 21.2 seconds.Filter element 310 after system continuous operation 72 hours, will be taken out in a manner described and test its filtration flux, tested The results are shown in Table 1 (referring to table 1).

Embodiment 4

Embodiment 4 takes coal reburner flue gas cleaning system and working method same as Example 3, but distinguishes basic It is to have used the heating and thermal insulation structure 400 in embodiment 1 on high temperature air filtration device 300.Through surveying, high temperature air filtration dress The average furnace gas temperature that filter gas vent is already expired for setting 300 is 535 DEG C.In a manner described by after system continuous operation 72 hours, It takes out filter element 310 and tests its filtration flux, test result is as shown in table 1 (referring to table 1).

Embodiment 5

As shown in figure 3, coal reburner flue gas cleaning system includes coal reburner 100 and is used for coal reburner The furnace gases of 100 outlet outputs are dusted the temperature gas dust remover 600 of purification, from the coal reburner in the system 100 furnace gas export can make furnace gas from coal until this part of temperature gas dust remover 600 constitutes one on the whole Reburner 100 outlet output start until by 600 dust separation of temperature gas dust remover during its furnace gas temperature Downward amplitude of fluctuation be maintained at no more than the furnace gas heating and thermal insulation flow path in the range of 80 DEG C.Specifically, the High Temperature Gas Body dust-extraction unit 600 is connected in series by 2 grades of mechanical dust collectors.Wherein the 1st grade of mechanical dust collector is gravitational precipitator 610, 2nd grade of mechanical dust collector is cyclone dust collectors 620, and the gas vent of dedusting of cyclone dust collectors 620 is directly connected by pipeline Furnace gas cools down oil-collecting device.The pipeline between dedusting gas feed is waited in connection coal reburner 100 and gravitational precipitator 610 Upper, connection gravitational precipitator 610 dedusting gas vent and cyclone dust collectors 620 wait on the pipeline between dedusting gas feed with And heating and thermal insulation sheath body 410, heating and thermal insulation sheath body 410 are mounted on the shell of gravitational precipitator 610 and cyclone dust collectors 620 Inside is heat medium transfer passage 420, and the heat medium transfer passage 420 is connect with heat medium source.Heat medium source It is heat medium equally to use combustion furnace, generation high-temperature flue gas, and heat medium enters heat medium transfer passage 420, to right Above-mentioned pipeline and gravitational precipitator 610 and cyclone dust collectors 620 are internally heated heat preservation.The coal of embodiment 5 converts High temperature air filtration device 300 is not arranged in stove flue gas cleaning system.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 5 is：Coal reburner 100 (is similarly Coal at Low Temperature gas retort) furnace gas 700 (490 DEG C of mean temperature) of outlet output is first sent to gravitational precipitator 610 and carries out tentatively Cyclone dust collectors 620 are entered back into after solid and gas separation is dusted purification, the gas vent of the dedusting discharge of cyclone dust collectors 620 Furnace gas dustiness≤150mg/Nm³Through surveying, gravitational precipitator 610 waits for that the average furnace gas temperature of dedusting gas feed is 485 DEG C, weight The average furnace gas temperature of the gas vent of dedusting of inertia force precipitator 610 be 476 DEG C, cyclone dust collectors 620 wait for dedusting gas into The average furnace gas temperature of mouth is 467 DEG C, and the average furnace gas temperature of the gas vent of dedusting of cyclone dust collectors 620 is 460 DEG C, from Coal reburner 100 generates furnace gas and starts until furnace gas exports average time from the gas vent of dedusting of gravitational precipitator 620 21 seconds.

Embodiment 6

Embodiment 6 takes coal reburner flue gas cleaning system and working method same as Example 5, but distinguishes basic It is：Cyclone dust collectors 610 wait for that the average furnace gas temperature of dedusting gas feed is 495 DEG C, and cyclone dust collectors 610 have removed dust and gas The average furnace gas temperature of body outlet is 503 DEG C, and the average furnace gas temperature for waiting for dedusting gas feed of gravitational precipitator 620 is 510 DEG C, the average furnace gas temperature of the gas vent of dedusting of gravitational precipitator 620 is 516 DEG C, and furnace gas is generated from coal reburner 100 Start up to furnace gas to be 21 seconds from the gas vent of dedusting of gravitational precipitator 620 output average time.

Embodiment 7

As shown in figure 4, coal reburner flue gas cleaning system includes coal reburner 100 and is used for coal reburner 100 furnace gases generated are filtered the high temperature air filtration device 300 of purification, and the high temperature air filtration device 300 is incorporated into Make in coal reburner 100 since coal reburner 100 generates furnace gas up to furnace gas is by high temperature air filtration device The process of 300 filter element 310 betides inside coal reburner 100.Specifically, the coal reburner 100 includes The upper furnace body 110 and lower furnace body 120 be connected each other, the lower furnace body 120 are vertical heater, and coal conversion is happened at lower furnace body 120 In, the furnace chamber of the upper furnace body 110 deviates the furnace chamber of lower furnace body 120；The high temperature air filtration device 300 is set to upper furnace body In 110 furnace chamber, the outside of upper furnace body 110 is equipped with the exhaust that air filtration body outlet conducting is already expired with high temperature air filtration device 300 Structure 111.Since the furnace chamber of upper furnace body 110 deviates the furnace chamber of lower furnace body 120, the stove that can be generated to avoid lower furnace body 120 Gas impacts high temperature air filtration device 300 directly up, it is ensured that the reliability that high temperature air filtration device 300 uses.As height The specific mounting means of warm gas-filtering device 300, the interval of high temperature air filtration device 300 are installed on upper furnace body 110 On furnace wall, the outside of upper furnace body 110 is equipped with exhaust clamshell 111a, and filter gas vent is already expired in each high temperature air filtration device 300 It is connected with exhaust clamshell 111a across the furnace wall of upper furnace body 110.For example, multiple high temperature air filtration devices 300 exist as shown in Figure 4 110 top horizontal arranged for interval of upper furnace body, exhaust clamshell 111a are then located at the top of 110 furnace wall of upper furnace body.In addition, in exit casing Also shown in FIG. 1 in cover 111a to be provided with Wen's anti-blowpipe 320 and blowback air inlet pipe 330, the entrance of blowback air inlet pipe 330 connects Reversed air blowing source.300 filter element 310 of above-mentioned high temperature air filtration device is sintering intermetallic Fe-Al compound porous material mistake Filtering element.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 7 is：It is generated in 120 furnace chamber of lower furnace body High-temperature furnace gas moves upwards and deflecting enters in the furnace chamber of upper furnace body 110, then reaches high temperature air filtration device 300 rapidly, And purification is filtered by the filter element of high temperature air filtration device 300 310, then from the filtering of exhaust clamshell 111a The high-temperature furnace gas after filtration, purification is discharged in gas vent, also, in the operational process of high temperature air filtration device 300, equally It is anti-to filter element progress pulse by blowback air inlet pipe 330 and Wen's anti-blowpipe 320 to start back-blowing dust removing device every 600 seconds Blowing-out ash, blowback atmospheric pressure is 0.8MPa, blowback air temperature is 400 DEG C.Through surveying, exhaust clamshell 111a's is already expired filter gas vent Furnace gas dustiness≤10mg/Nm of discharge³, average furnace gas temperature is 531 DEG C, while being calculated raw out of lower furnace body 120 furnace chamber Start up to furnace gas to be 4.8 seconds from the average time that filter gas vent exports that is already expired of exhaust clamshell 111a at furnace gas.By above-mentioned Mode after system continuous operation 72 hours, will take out filter element 310 and test its filtration flux, and test result is as shown in table 1.

Embodiment 8

As shown in figure 5, the coal reburner flue gas cleaning system equally includes coal reburner 100 and is used to turn coal Change the high temperature air filtration device 300 that the furnace gas that stove 100 generates is filtered purification, the high temperature air filtration device 300 is whole Conjunction makes since coal reburner 100 generates furnace gas in coal reburner 100 up to furnace gas has passed through high temperature air filtration The process of the filter element 310 of device 300 betides inside coal reburner 100.Specifically, the coal reburner 100 Horizontal rotatable furnace body 130 including inner hollow and the rotary motion mechanism with the drive connection of rotatable furnace body 130；It is described High temperature air filtration device 300 is set in the furnace chamber of rotatable furnace body 130, and the outside of rotatable furnace body 130 is equipped with and high temperature The exhaust structure 131 of air filtration body outlet conducting is already expired in gas-filtering device 300.It is set to as high temperature air filtration device 300 Concrete mode in 130 furnace chamber of rotatable furnace body, high temperature air filtration device 300 are spaced the stove for being installed on rotatable furnace body 130 On wall, the outside of rotatable furnace body 130 is equipped with exhaust clamshell 131a, and the air filtration body that is already expired of each high temperature air filtration device 300 goes out Mouth passes through the furnace wall of rotatable furnace body 130 to be connected with exhaust clamshell 131a.Above-mentioned coal reburner flue gas cleaning system can be straight It is connected on current coal destructive distillation rotary kiln and improves, i.e., install high temperature air filtration device 300 and exhaust additional in rotary kiln Structure 131.For example, the axially spaced-apart of the furnace wall upper edge rotary kiln in existing rotary kiln (being equivalent to rotatable furnace body 130) Multigroup high temperature air filtration device 300 is installed, every group of high temperature air filtration device 300 is again by multiple along the circumferentially-spaced of rotary kiln The high temperature air filtration device 300 of arrangement forms, and is vented clamshell 131a integral coatings outside the furnace wall of rotary kiln, rotary kiln Feed inlet 132 (output coal feedstock 810) and slag-drip opening 133 (output slag 820) are each passed through exhaust clamshell 131a, are vented clamshell 131a is equipped with exhaust outlet 134 (output furnace gas 700).300 filter element 310 of above-mentioned high temperature air filtration device is similarly sintering Intermetallic Fe-Al compound porous material filter element.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 8 is：It is raw in 130 furnace chamber of rotatable furnace body At high-temperature furnace gas purification is filtered by the filter element 310 of high temperature air filtration device 300 directly in furnace chamber, then High-temperature furnace gas after the discharge filtration, purification of exhaust outlet 134 of exhaust clamshell 111a.Through measuring and calculating, the stove of exhaust clamshell 111a discharges Gas dustiness≤10mg/Nm³, average furnace gas temperature is 545 DEG C, while being calculated since generating furnace gas in furnace chamber up to furnace gas The average time exported from exhaust clamshell 111a is 4.2 seconds.

Embodiment 9

It can including the horizontal of inner hollow as shown in fig. 6, the coal reburner 100 of embodiment 9 is same in the same manner as in Example 8 The rotary motion mechanism for turning round furnace body 130 and being sequentially connected with rotatable furnace body 130；The high temperature air filtration device 300 It is set in the furnace chamber of rotatable furnace body 130, the outside of rotatable furnace body 130 is equipped with to be already expired with high temperature air filtration device 300 The exhaust structure 131 of air filtration body outlet conducting.Difference lies in high temperature air filtration devices 300 can for embodiment 9 and embodiment 8 It turns round on the mounting means in 130 furnace chamber of furnace body.Specifically, high temperature air filtration device 300 in rotatable furnace body 130 Filter element 310 is axially disposed within along rotatable furnace body 130 in the furnace chamber of rotatable furnace body 130, outside rotatable furnace body 130 Portion is equipped with exhaust clamshell 131a, and the both ends of the filter element 310 are fixed in the furnace chamber of rotatable furnace body 130 and at least one end It is connected with exhaust clamshell 131a by positioning exhaust structure.Since the axial direction by filter element 310 along rotatable furnace body 130 is set It sets, the high-temperature furnace gas generated in the furnace chamber of rotatable furnace body 130 more can rapidly pass through filter element 310.More specifically, As shown in fig. 6, filter element 310 can be designed to elongate tubular filter element (between the cemented iron aluminum metal chemical combination of both ends open Object porous material filter element, length can be 2~4 meters even longer), the axially spaced-apart in the furnace chamber of rotatable furnace body 130 Several pieces of partition boards 320 are installed, these partition boards 320 are axially spaced at several conversion zones being isolated from each other, each reaction by the furnace chamber More filter elements 310 are axially installed in section, the both ends of filter element 310 pass through the filtering on 130 furnace wall of rotatable furnace body Filter element mounting-positioning holes on element mounting-positioning holes and/or partition board 320 fix and with the row outside rotatable furnace body 130 The 131a conductings of gas clamshell, exhaust clamshell 131a integral coatings are outside the furnace wall of rotatable furnace body 130, in addition on each conversion zone It is equipped with feed inlet 132 (output coal feedstock 810) and slag-drip opening 133 (output slag 820), feed inlet 132 and slag-drip opening 133 divide It Chuan Guo be vented clamshell 131a, exhaust clamshell 131a is equipped with exhaust outlet 134 (output furnace gas 700).Above-mentioned coal reburner stove Gas purification system equally can be improved directly on current coal destructive distillation rotary kiln.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 9 is：It is raw in 130 furnace chamber of rotatable furnace body At high-temperature furnace gas purification is filtered by the filter element 310 of high temperature air filtration device 300 directly in furnace chamber, then High-temperature furnace gas after the discharge filtration, purification of exhaust outlet 134 of exhaust clamshell 111a.Through measuring and calculating, the stove of exhaust clamshell 111a discharges Gas dustiness≤10mg/Nm³, average furnace gas temperature is 546 DEG C, while being calculated since generating furnace gas in furnace chamber up to furnace gas The average time exported from exhaust clamshell 111a is 3.8 seconds.

Embodiment 10

As shown in figure 8, being equipped with pre-dedusting device 200, coal between coal reburner 100 and high temperature air filtration device 300 The furnace gas export of charcoal reburner 100 waits for that dedusting gas feed is connected to pre-dedusting device 200, and pre-dedusting device 200 has removed Dirt gas vent is connected to the gas feed to be filtered of high temperature air filtration device 300, the coal reburner 100 and pre- dedusting Connected respectively by longer pipeline between device 200 and between pre-dedusting device 200 and high temperature air filtration device 300 It connects, in addition, being equipped with furnace gas heating device positioned at the front end of 300 gas feed to be filtered of high temperature air filtration device in the system 500, the hot gas inlet to be added of the furnace gas heating device 500 is connect with the gas vent of dedusting of pre-dedusting device 200, furnace gas The outlet of heat gas of heating device 500 is connect with the gas feed to be filtered of high temperature air filtration device 300.Wherein, stove Gas heating device 500 specifically uses Electric heating.The pre-dedusting device 200 and high temperature air filtration device 300 it is interior Portion's structure is same as Example 1, but without using the heating and thermal insulation structure 400 in embodiment 1, and is only in high temperature air filtration The enclosure interior of device 300 is equipped with insulating layer.In addition, the stove between pre-dedusting device 200 and high temperature air filtration device 300 Be connected on gas transfer passage for into the furnace gas transfer passage injection inhibit the polymerization inhibitor of free radical polymerization in furnace gas to help Agent feeding device A10, auxiliary agent feedway A10 include that compounding agent solution tank A11 (is mass concentration in compounding agent solution tank A11 15% hydroquinone aqueous solution), the outlet of the NaOH solution tank NaOH A11 connects the entrance of syringe pump A12 by pipeline, syringe pump Outlet connects furnace gas transfer passage by pipeline.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 10 is：Coal reburner 100 exports defeated The furnace gas 700 (515 DEG C of mean temperature) gone out is first sent to after pre-dedusting device 200 carries out preliminary solid and gas separation to be added by furnace gas again Thermal 500 is heated, the furnace gas 700 after heating and the hydroquinone water injected by syringe pump A12 in furnace gas transfer passage Solution mixes, and the addition of hydroquinone is the 2% of gas integral molar quantity to be filtered, and mixed gas passes through gas to be filtered Import enters in the Primordial Qi room of high temperature air filtration device 300, then by entering above orifice plate after the filtering of filter element 310 Air-purifying chamber, finally from be already expired filter gas vent be discharged into furnace gas segmentation recycling link, be already expired filter gas vent discharge stove Gas dustiness≤10mg/Nm³, and in the operational process of high temperature air filtration device 300, equally started every 600 seconds anti- Blowing-out apparatus for ash carries out pulse backblowing deashing, blowback air pressure by blowback air inlet pipe 330 and Wen's anti-blowpipe 320 to filter element Power is 0.8MPa, blowback air temperature is 400 DEG C.Through surveying, pre-dedusting device 200 waits for that the average furnace gas temperature of dedusting gas feed is 485 DEG C, the average furnace gas temperature of the gas vent of dedusting of pre-dedusting device 200 is 456 DEG C, high temperature air filtration device 300 The average furnace gas temperature of gas feed to be filtered be 500 DEG C, the flat of filter gas vent is already expired in high temperature air filtration device 300 Equal furnace gas temperature is 480 DEG C, up to furnace gas is from high temperature air filtration device 300 since coal reburner 100 generates furnace gas It is 21.4 seconds that filter gas vent output average time, which is already expired,.In a manner described by after system continuous operation 72 hours, filtering is taken out Element 310 simultaneously tests its filtration flux, and test result is as shown in table 1 (referring to table 1).

Embodiment 11

As shown in figure 9, being equipped with pre-dedusting device 200, coal between coal reburner 100 and high temperature air filtration device 300 The furnace gas export of charcoal reburner 100 waits for that dedusting gas feed is connected to pre-dedusting device 200, and pre-dedusting device 200 has removed Dirt gas vent is connected to the gas feed to be filtered of high temperature air filtration device 300, the coal reburner 100 and pre- dedusting Connected respectively by longer pipeline between device 200 and between pre-dedusting device 200 and high temperature air filtration device 300 It connects, in addition, being equipped with furnace gas heating device positioned at the front end of 300 gas feed to be filtered of high temperature air filtration device in the system (being more not shown in figure), the hot gas inlet to be added of the furnace gas heating device and the dedusting gas vent of pre-dedusting device 200 The outlet of heat gas of connection, furnace gas heating device is connect with the gas feed to be filtered of high temperature air filtration device 300.Its In, furnace gas heating device specifically uses Electric heating.The pre-dedusting device 200 and high temperature air filtration device 300 Internal structure is same as Example 1, but without using the heating and thermal insulation structure 400 in embodiment 1, and is only in high-temperature gas mistake The enclosure interior for filtering device 300 is equipped with insulating layer.In addition, between pre-dedusting device 200 and high temperature air filtration device 300 Be connected on furnace gas transfer passage for into the furnace gas transfer passage injection for being diluted to the free radical in furnace gas Carrier gas feeder A20.The filter gas vent that is already expired of above-mentioned high temperature air filtration device 300 cools down oil recovery system with furnace gas 900 entrance connection, the furnace gas cooling oil recovery system 900 include that three-level furnace gas Oil injection cooling receives oily unit 910, furnace gases at different levels Oil injection cooling receives oily unit 910, and the use of the fluid that furnace gas cooling generates to be cooling medium carry out spraying cooling and right to follow-up furnace gas Cooling obtained fluid is recycled, and the furnace gas Oil injection coolings at different levels receive oily unit 910, and (first order furnace gas Oil injection cooling receives oil Unit 910a is to receive oily unit for recycling the furnace gas Oil injection cooling of heavy oil, and second level furnace gas Oil injection cooling receives oil unit 910b and is Oily unit is received for furnace gas Oil injection cooling oily in recycling, it is light for recycling that third level furnace gas Oil injection cooling, which receives oily unit 910c, The furnace gas Oil injection cooling of oil receives oily unit) include washing oil tower 911, oil storage tank 912, oil transfer pump 913 and oil cooler 914, it is described to wash The inlet end and exhaust end of oily tower 911 be series at entire coal liquifaction system furnace gas operation flow path on, the oil storage tank 912 into Oily end is connected with the oil extraction end of corresponding 911 bottom of washing oil tower, and the oil transfer pump 913 and oil cooler 914 connect with corresponding washing oil tower 911 It connects to form the spray oil circulation supply circuit that the furnace gas Oil injection cooling receives oily unit 910, afterbody furnace gas Oil injection cooling The gas (light gas such as CH4, C2, C3, C4) for receiving the 910 exhaust end discharge of oily unit passes through heating device A21 as carrier gas It injects in the furnace gas transfer passage between pre-dedusting device 200 and high temperature air filtration device 300 afterwards.

The specific working mode of the coal reburner flue gas cleaning system of embodiment 11 is：Coal reburner 100 exports defeated The furnace gas 700 (515 DEG C of mean temperature) gone out is first sent to after pre-dedusting device 200 carries out preliminary solid and gas separation to be added by furnace gas again Thermal 500 is heated, and the furnace gas 700 after heating is mixed with carrier gas, and the addition of carrier gas is furnace gas volume to be filtered 10%, mixed gas is entered by gas feed to be filtered in the Primordial Qi room of high temperature air filtration device 300, is then led to The air-purifying chamber entered above orifice plate is crossed after the filtering of filter element 310, is finally discharged into furnace gas point from filter gas vent is already expired Furnace gas dustiness≤10mg/Nm of filter gas vent discharge is already expired in Duan Huishou links³, and in high temperature air filtration device 300 Operational process in, equally every 600 seconds start back-blowing dust removing device it is right by blowback air inlet pipe 330 and Wen's anti-blowpipe 320 Filter element carries out pulse backblowing deashing, and blowback atmospheric pressure is 0.8MPa, blowback air temperature is 400 DEG C.Through surveying, pre-dedusting device 200 wait for that the average furnace gas temperature of dedusting gas feed is 485 DEG C, the average furnace of the gas vent of dedusting of pre-dedusting device 200 Temperature degree is 456 DEG C, and the average furnace gas temperature of the gas feed to be filtered of high temperature air filtration device 300 is 490 DEG C, High Temperature Gas The average furnace gas temperature that filter gas vent is already expired of body filter device 300 is 470 DEG C, and generating furnace gas from coal reburner 100 opens Begin up to furnace gas to be 22 seconds from the filter gas vent output average time that is already expired of high temperature air filtration device 300.In a manner described After system continuous operation 72 hours, take out filter element 310 and simultaneously test its filtration flux, test result as shown in table 1 (referring to Table 1).

Embodiment 12

As shown in Figure 10, progress of the coal reburner flue gas cleaning system of embodiment 12 to embodiment 10 and embodiment 11 The technical solution that diluent is added in embodiment 11 into furnace gas to be filtered is specifically applied in embodiment 10 by combination, I.e. afterbody furnace gas Oil injection cooling receives gas (light gas such as CH4, C2, C3, C4) conduct of oily unit 910 exhaust end discharge (addition of carrier gas is in the furnace gas transfer passage that carrier gas injects between pre-dedusting device 200 and furnace gas heating device 500 The 10% of furnace gas volume to be filtered), then heated again by furnace gas heating device 500, the furnace gas 700 after heating with by noting The hydroquinone aqueous solution mixing in pump A12 injection furnace gas transfer passages is penetrated, the addition of hydroquinone is that gas to be filtered is total The 2% of mole, mixed gas are entered by gas feed to be filtered in the Primordial Qi room of high temperature air filtration device 300, Then by after the filtering of filter element 310 enter orifice plate above air-purifying chamber, finally from be already expired filter gas vent be discharged into Furnace gas segmentation recycling link, is already expired furnace gas dustiness≤10mg/Nm of filter gas vent discharge³, and in high temperature air filtration In the operational process of device 300, equally started back-blowing dust removing device every 600 seconds and pass through blowback air inlet pipe 330 and Wen's blowback Pipe 320 carries out pulse backblowing deashing to filter element, and blowback atmospheric pressure is 0.8MPa, blowback air temperature is 400 DEG C.Through surveying, in advance Dust-extraction unit 200 waits for that the average furnace gas temperature of dedusting gas feed is 485 DEG C, the dedusting gas vent of pre-dedusting device 200 Average furnace gas temperature be 456 DEG C, the average furnace gas temperature of the gas feed to be filtered of high temperature air filtration device 300 is 500 DEG C, the average furnace gas temperature that filter gas vent is already expired of high temperature air filtration device 300 is 480 DEG C, is given birth to from coal reburner 100 Start up to furnace gas to be 22.3 seconds from the filter gas vent output average time that is already expired of high temperature air filtration device 300 at furnace gas. Filter element 310 after system continuous operation 72 hours, will be taken out in a manner described and tests its filtration flux, test result such as table (referring to table 1) shown in 1.

Comparative example

Coal at Low Temperature destructive distillation furnace gas purification system, is equipped between coal reburner 100 and high temperature air filtration device 300 Pre-dedusting device 200, the furnace gas export of coal reburner 100 wait for that dedusting gas feed is connected to pre-dedusting device 200, remove in advance The gas vent of dedusting of dirt device 200 is connected to the gas feed to be filtered of high temperature air filtration device 300, and the coal turns Change between stove 100 and pre-dedusting device 200 and passes through respectively between pre-dedusting device 200 and high temperature air filtration device 300 Longer pipeline is attached, the internal structure and embodiment of the pre-dedusting device 200 and high temperature air filtration device 300 1 is identical, but Insulation is not used.

The specific working mode of the coal reburner flue gas cleaning system is：The furnace gas of the outlet of coal reburner 100 output (505 DEG C of mean temperature) be first sent to pre-dedusting device 200 carry out after preliminary solid and gas separation again by gas feed to be filtered into In the Primordial Qi room for entering high temperature air filtration device 300, then by entering the net gas above orifice plate after the filtering of filter element 310 Room, finally from be already expired filter gas vent be discharged into furnace gas segmentation recycling link, be already expired filter gas vent discharge furnace gas dust-laden Amount≤10mg/Nm³, and in the operational process of high temperature air filtration device 300, equally started reverse gas cleaning every 600 seconds Device carries out pulse backblowing deashing by blowback air inlet pipe 330 and Wen's anti-blowpipe 320 to filter element, and blowback atmospheric pressure is 0.8MPa, blowback air temperature are 400 DEG C.Through surveying, pre-dedusting device 200 waits for that the average furnace gas temperature of dedusting gas feed is 475 DEG C, the average furnace gas temperature of the gas vent of dedusting of pre-dedusting device 200 is 447 DEG C, and high temperature air filtration device 300 waits for The average furnace gas temperature for filtering gas feed is 418 DEG C, the average furnace that filter gas vent is already expired of high temperature air filtration device 300 Temperature degree be 395 DEG C, since coal reburner 100 generate furnace gas up to furnace gas being already expired from high temperature air filtration device 300 It is 22.3 seconds to filter gas vent output average time.In a manner described by after system continuous operation 72 hours, filter element is taken out 310 and its filtration flux is tested, test result is as shown in table 1 (referring to table 1).

Above-described embodiment and the furnace gas temperature change curve of comparative example are as shown in Figure 7.Wherein, the abscissa in Fig. 7 is Furnace gas generates to during by dust separation each temperature monitoring point, and ordinate detects flat for each temperature detecting point correspondence Equal furnace gas temperature.Unused high temperature air filtration device 300 in embodiment 5,6, therefore its furnace gas temperature change curve dotted line table Show.

To the apparent distributing homogeneity of 310 surface filter cake of filter element of above-described embodiment and comparative example, 310 mistake of filter element The test result for the dust oil content that filtration flux and system high temperature gas dust-removing device 600 are recovered to is as shown in table 1.For The dust oil content that temperature gas dust remover 600 is recovered to, Examples 1 to 4,7 and the dust of comparative example take to high temperature The dust of gas-filtering device 300, embodiment 5,6 takes to cyclone dust collectors 620.

Table 1

Explanation：1) 1 "×" indicates no this item in table.2) the apparent distributing homogeneity of filter element surface filter cake point 5 is commented Valence grade, from difference to good respectively " uneven ", " more uneven ", " general ", " uniform ", " highly uniform ".Filter element table Face filter cake is apparent to be unevenly distributed often that filtration flux is not everywhere because filtering material local stoppages cause filter element surface Caused by uniformly, therefore, by the observation to the apparent distributing homogeneity of filter element surface filter cake, it can tentatively judge to filter The blocked situation of element.In general, filter element surface filter cake it is apparent be unevenly distributed it is higher, illustrate filtering material part Stopping state is more serious.3) filter element relative permeability is specially in every square metre of filter area, in every kpa (kPa) mistake Filtering pressure it is poor and per hour under air flux.Relative permeability is smaller, illustrates that filtering material stopping state is more serious.4) dust 4 opinion ratings of oil content point, are respectively " low ", " relatively low ", " higher ", "high" from low to high from dust oil content.Dust contains Oil mass is higher, and it is more to illustrate that the oil in furnace gas is precipitated, subsequently lower to the rate of recovery of oil.

Claims

1. coal reburner flue gas cleaning system, including coal reburner（100）With for coal reburner（100）It exports defeated The furnace gas gone out is filtered the high temperature air filtration device of purification（300）, it is characterised in that：In coal reburner（100）With height Warm gas-filtering device（300）Between furnace gas transfer passage on be connected in high temperature air filtration device（300）Filtering The carrier gas feeder being diluted to the free radical in furnace gas is injected when operation into the furnace gas transfer passage（A20）, institute The volume ratio control for stating carrier gas and furnace gas to be diluted is being 10~30%, and the temperature of gaseous mixture is not after carrier gas is mixed with furnace gas Less than 380 DEG C.

2. the system as claimed in claim 1, it is characterised in that：The carrier gas be high temperature super heated steam, high temperature carbon dioxide, One or more of high temperature carbon monoxide.

3. system as claimed in claim 1 or 2, it is characterised in that：In coal reburner（100）With high temperature air filtration device （300）Between furnace gas transfer passage on be also associated with for into the furnace gas transfer passage injection inhibit furnace gas in radical polymerization The polymerization inhibitor of conjunction and/or the auxiliary agent feedway of retarder（A10）.

4. system as claimed in claim 3, it is characterised in that：The auxiliary agent feedway（A10）It is used for furnace gas for one kind It is nitrobenzene, m-nitro, m-chloronitrobenzene, trinitrobenzen, hydroquinone, isophthalic two that active ingredient is injected in transfer passage Phenol, 2,2- diphenyl -1- trinitrophenyl-hydrazines, 1,4-benzoquinone, tetramethyl-benzoquinone, 2- methyl -2- nitromethanes, the tertiary fourths of phenyl-N- Any one or a few auxiliary agent feedway in base nitrone.

5. system as claimed in claim 3, it is characterised in that：The coal reburner（100）With high temperature air filtration device （300）Between be equipped with pre-dedusting device（200）, coal reburner（100）Furnace gas export and pre-dedusting device（200）Wait remove Dust and gas body inlet communication, pre-dedusting device（200）The gas vent of dedusting and high temperature air filtration device（300）It is to be filtered Gas feed is connected to；The auxiliary agent feedway（A10）Auxiliary agent output end and carrier gas feeder（A20）Output end It is both connected to pre-dedusting device（200）With high temperature air filtration device（300）Between furnace gas transfer passage on.

6. system as claimed in claim 3, it is characterised in that：The auxiliary agent feedway（A10）Including compounding agent solution tank （A11）, the compounding agent solution tank（A11）Outlet syringe pump is connected by pipeline（A12）Entrance, the outlet of syringe pump passes through Pipeline connects furnace gas transfer passage.

7. system as claimed in claim 1 or 2, it is characterised in that：From the coal reburner in the system（100）Furnace gas Outlet is until high temperature air filtration device（300）This part constitute one on the whole furnace gas can be made from coal reburner （100）Outlet output starts until passing through high temperature air filtration device（300）Filter element（310）During its furnace gas The downward amplitude of fluctuation of temperature is maintained at no more than the furnace gas heating and thermal insulation flow path in the range of 80 DEG C.

8. system as claimed in claim 1 or 2, it is characterised in that：The high temperature air filtration device（300）Using sintered gold Genus polyporus filtration of material element or sintering ceramic porous material filter element.

9. system as claimed in claim 1 or 2, it is characterised in that：The coal reburner（100）It is low specially to implement coal The coal gas retort of warm distillation process or coal medium temperature carbonization technique.

10. the system as claimed in claim 1, it is characterised in that：The high temperature air filtration device（300）It can be by stove for one Dust content in gas is controlled in 20mg/Nm³Gas-filtering device below, high temperature air filtration device（300）Filtering Gas vent cools down oil recovery system with furnace gas（900）Entrance connection, the furnace gas cools down oil recovery system（900）Including at least two Grade furnace gas Oil injection cooling receives oily unit（910）, the oily units of furnace gas Oil injection coolings receipts at different levels（910）The oil generated using furnace gas cooling Liquid is that cooling medium carries out spraying cooling to follow-up furnace gas and recycled to cooling obtained fluid, the furnace gas oil spouts at different levels It is cooling to receive oily unit（910）Including washing oil tower（911）, oil storage tank（912）, oil transfer pump（913）And oil cooler（914）, described to wash Oily tower（911）Inlet end and exhaust end be series at flue gas cleaning system furnace gas operation flow path on, the oil storage tank（912）'s Oil inlet end and corresponding washing oil tower（911）The oil extraction end of bottom connects, the oil transfer pump（913）And oil cooler（914）It is washed with corresponding Oily tower（911）Connection forms the furnace gas Oil injection cooling and receives oily unit（910）Spray oil circulation supply circuit；The dilution Gas is that afterbody furnace gas Oil injection cooling receives oily unit（910）The gas of exhaust end discharge.