CN205323434U - Filtering medium heating device - Google Patents

Abstract

The utility model discloses a filtering medium heating device, filtering medium heating device including the heater that is used for heating filtering medium and with feed bin (51) of the discharge gate intercommunication of heater, an air -look device (52) and the 2nd air -look device (53) that are used for control of gases and filtering medium to pass through are do not installed in the feed inlet and the discharge gate punishment of feed bin (51), work as an air -look device (52) are when opening, the 2nd air -look device (53) are closed, work as the 2nd air -look device (53) are when opening, an air -look device (52) are closed to avoid taking place the gas blowby. The utility model discloses a filtering medium heating device can improve filtering medium's temperature to satisfy the dust removal requirement of grained layer filter to high -temperature gas.

Description

Filter medium heater

Technical field

This utility model relates to gas cleaning at high temperature field, in particular it relates to a kind of for the heater after the filter medium deashing to granular-bed filter。

Background technology

In the industries such as chemical industry, oil, metallurgy, electric power, often produce high-temperature dusty gas。Owing to different process needs or in order to reach environmental emission standard, all need these high-temperature dusty gas are carried out dedusting。Such as, some pyrolytic process (such as fluidized bed pyrolysis, rotary furnace pyrolysis, the heating of gas lift pipe) is to comprise or for wide granularity coal or comminution coal, these techniques all can produce larger amount of dust in pyrolytic process, these dust as removed not in time from coal gas, once temperature reduces, dust is bonded together with the heavy tar condensed, it is possible to cause that pyrolysis system is forced to stop work；The de-dirt of coal gas is insufficient, also can pollute or block follow-up coal tar processing equipment, reduces coal tar quality。

High-temperature gas (i.e. high-temperature dusty gas) dedusting is to be made directly gas solid separation under hot conditions, it is achieved a technology of gas purification。Existing conventional dust arrester, such as cyclone separator, electrostatic precipitator etc., is all difficult to use in the dedusting of high-temperature gas, and moving granular bed dust removal by filtration is considered as then one of the most potential high-temperature dust removal technology。Granular-bed filter is to utilize physics and the highly stable solid particle composition filter course of chemical property to realize device to gas filtration, has high temperature resistant and that persistency is good advantage。

Patent documentation CN1228127C discloses a kind of stratum granulosum, can be used for the dedusting of coal gas of high temperature and flue gas。As it is shown in figure 1, this granular-bed filter is mainly made up of filter housings 1 ', gas collection cylinder 2 ', subregion cylinder 3 ', filter cone bucket 4 ', filtration gas inlet tube 5 ', filtration gas outlet tube 6 ', filtrate inlet tube 7 ' and filtrate outlet 8 '。Gas collection cylinder 2 ' is for columnar structured。After loading filtrate 9 ' in this granular-bed filter, the annular space that the filtrate 9 ' upper surface piled up in the upper cavity wall of filter housings 1 ', gas collection cylinder 2 ' outer wall and filter surrounds constitutes gas collection space 10 '。Filtering gas inlet tube 5 ' center, portion on the filter, body stretches in subregion cylinder 3 ' through upper cover, and the lower end of inlet tube 5 ' is horn mouth。Operationally, after high-temperature gas enters granular-bed filter from filtration gas inlet tube 5 ', first co-current flow made by the filtrate downwards and in subregion cylinder 3 ', direction is changed at subregion cylinder 3 ' lower edge, counter-current flow is made with filtrate 9 ', then the annular gas collection space 10 ' in gas collection cylinder 2 ' outside is entered by filtrate, finally from filtering gas outlet tube 6 ' outflow。The dust of high-temperature gas is when high-temperature gas makes co-current flow with filtrate 9 ', part is trapped by filtrate 9 ' and carries and moves downward, in co-current flow, after the dust of collection at large and trapping, the dust that is less easily entrained by will when high-temperature gas makes counter-current flow with filtrate 9 ', trapped further, realized the dedusting of high-temperature gas thereby through this stratum granulosum。

The dust-laden filter medium that above-mentioned stratum granulosum is discharged from its filtrate outlet 8 ' enters dust remover by conveying pipe, by gas dust is carried in cyclone separator in dust remover and traps, filter medium after deashing enters in filter from filtrate inlet tube 7 ', thus realizing recycling of filter medium。Although adopting the regeneration being capable of filter medium in this way to use, but owing to filter medium mutually colliding in moving process may make dust cling on filter medium, these dusts clinged on filter medium are difficult to from filter medium to separate by the purging of gas, the ash-removal effect making above-mentioned dust remover reduces, thus causing that the strainability of moving granular bed filter declines。In order to reach good ash-removal effect, it is generally required to use cleanout fluid (as, water) to filter medium (as, inert ceramic balls) deashing, but after adopting the cleaned filter medium of cleanout fluid, filter medium temperature can be made to reduce, thus causing that filter medium cannot be used in granular-bed filter high-temperature gas (particularly coal pyrolysis gas) dedusting。

Utility model content

The purpose of this utility model is to provide a kind of filter medium heater, for improving the temperature of filter medium, to meet the granular-bed filter dust removal requirement to high-temperature gas。

To achieve these goals, this utility model provides a kind of filter medium heater, the feed bin that described filter medium heater includes the heater for heating and filtering medium and the discharging opening with described heater connects, the charging aperture of described feed bin and discharge outlet are separately installed with for controlling gas and the first air-lock device that filter medium passes through and the second air-lock device, when described first air-lock device is opened, described second air-lock device cuts out, when described second air-lock device is opened, described first air-lock device cuts out, to avoid gas blowby。

Preferably, described feed bin has insulation construction。

Preferably, described heater includes heater housings and the air inlet pipe being arranged on heater housings and escape pipe, and the gas outlet of described air inlet pipe is positioned at heater case body, and the gas outlet of described air inlet pipe is arranged down。

Preferably, the bottom of described heater housings is up big and down small conical section, and described air inlet pipe is arranged on described conical section, and described air inlet pipe is many and axially uniform along described conical section, and the discharging opening of described heater is positioned at the bottom of described conical section。

Preferably, the bottom of described heater housings is up big and down small conical section, described air inlet pipe is arranged on described conical section, described air inlet pipe includes total inlet pipe road and the many branched inlet pipe roads connected with described total inlet pipe road, and every described branched inlet pipe road is provided with multiple gas outlet down。

Preferably, many described branched inlet pipe roads are uniform around the axis of described conical section in described conical section。

Preferably, the top of described heater housings is cylindrical portion, and the lower end of described cylindrical portion is positioned at the upper end of described conical section and connects, and the charging aperture of described heater and described escape pipe are respectively positioned on the top of described cylindrical portion。

Preferably, described heater includes the bringing-up section of open at both ends and for closing the first closed section of two opening ends of described bringing-up section, the second closed section, described first closed section offers the charging aperture of described heater, the bottom of described second closed section offers the discharging opening of described heater, described bringing-up section is along sloping downwardly in the direction setting from the first closed section to the second closed section, so that filter medium can move from the charging aperture of described heater to discharging opening。

Preferably, described bringing-up section is rotatably connected between described first closed section and the second closed section, so that described bringing-up section can be passed through driving device and drive rotation。

Preferably, the charging aperture place of described heater is additionally provided with blanking inclined tube, and the discharging opening of described blanking inclined tube is positioned at described bringing-up section。

Compared with prior art, the filter medium heater that this utility model provides is by arranging heater, filter medium can be heated, by arranging feed bin, and charging aperture and the discharge outlet of feed bin is provided with the first air-lock device and the second air-lock device, can when the filter medium after heating be transported to moving granular bed filter, the high-temperature gas in moving granular bed filter can be effectively prevented from enter in heater to avoid bringing in heater by dust, and gas that may be present in heater can be avoided to enter in moving granular bed filter to avoid affecting the dust removing effects of moving granular bed filter。Therefore, the filter medium heater that this utility model provides can be effectively improved the temperature of filter medium, and meets the granular-bed filter dust removal requirement to high-temperature gas。

Other features and advantages of the utility model will be described in detail in detailed description of the invention part subsequently。

Accompanying drawing explanation

Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, but is not intended that restriction of the present utility model together with detailed description below。In the accompanying drawings:

Fig. 1 is the structural representation of stratum granulosum in prior art；

Fig. 2 is the schematic diagram of hot gas filtration system of the present utility model；

Fig. 3 is the structural representation of the moving granular bed filter shown in Fig. 2；

Fig. 4 is the structural representation of the air inlet backgauge part shown in Fig. 3 and dust-blowing device；

Fig. 5 is the left view of Fig. 4；

Fig. 6 is the structural representation of the filter medium deashing device shown in Fig. 2；

Fig. 7 is the structural representation of the orifice plate shown in Fig. 6；

Fig. 8 is the structural representation of the scraper plate of the scrapper conveyor described in Fig. 6；

Fig. 9 is the structural representation of the filter medium heater shown in Fig. 2；

Figure 10 is the structural representation overlooking direction of the heater shown in Fig. 9；

Figure 11 is the structural representation of the another embodiment of heater in this utility model；

Figure 12 is the upward view of the heater shown in Figure 11, does not wherein show the conical section of heater bottom；

Figure 13 is the structural representation of the another embodiment of heater in this utility model；

Figure 14 is the structural representation of hot gas filtration system of the present utility model；

Description of reference numerals

1 moving granular bed filter

11 filter housings 12 filter charging apertures

13 filter discharging opening 14 filtering air inlets

15 filter outlet mouth 16 air inlet backgauge parts

17 give vent to anger backgauge part 18 intake section

19 purge gas is responsible for 20 nozzles

21 dust-collecting cavity 22 dust-exhausting ports

3 filter medium deashing devices

31 deashing device housing 32 filter medium imports

33 filter mediums export 34 cleanout fluid liquid levels

35 baffler 36 overfalls

37 spray mouth 38 orifice plate

39 scrapper conveyor 40 underflow openings

41 filter medium conveying pipe 42 elongate holes

43 scraper plate 44 through holes

5 filter medium heaters

51 feed bin 52 first air-lock devices

53 second air-lock device 54 heater housings

55 air inlet pipe 56 escape pipes

57 bringing-up section 58 first closed sections

59 second closed section 60 blanking inclined tubes

61 branched inlet pipe road, total inlet pipe roads 62

7 chillers

71 conveying pipe 72 water inlets

73 outlets

8 lifting devices

Detailed description of the invention

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail。It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains this utility model, it is not limited to this utility model。

In this utility model, when not making contrary explanation, the noun of locality used typically refers to device that this utility model provides and what system defined under normal usage such as " upper and lower ", and consistent with the above-below direction shown in accompanying drawing 3, accompanying drawing 6 or accompanying drawing 9；" inside and outside " refers to inside and outside the profile of parts involved in this utility model。

The above-mentioned noun of locality defines for the ease of understanding this utility model, thus does not constitute the restriction to this utility model protection domain。

This utility model in prior art during high-temperature dusty gas dedusting Problems existing propose a kind of hot gas filtration system, suitably with reference to shown in Fig. 2, described hot gas filtration system includes moving granular bed filter 1, can be the filter medium deashing device 3 of the filter medium deashing that described moving granular bed filter 1 is discharged and for being heated by the filter medium after deashing and being transported to the filter medium heater 5 in described moving granular bed filter 1。

Specifically, the filter discharging opening 13 of moving granular bed filter 1 connects with the filter medium import 32 of filter medium deashing device 3, the clean filter medium of filter medium outlet 33 discharge of filter medium deashing device 3 is transported to filter medium heater 5, the discharging opening of filter medium heater 5 connects with the filter charging aperture 12 of moving granular bed filter 1, consider the flowing convenience of filter medium, moving granular bed filter 1 can be arranged on the top of filter medium deashing device 3, filter medium heater 5 can be arranged on the top of moving granular bed filter 1, in order to easily the filter medium that filter medium deashing device 3 is discharged is transported to filter medium heater 5, lifting device 8 can be set between described filter medium deashing device 3 and described filter medium heater 5。

Filtering dust in high-temperature dusty gas in use, is removed by the hot gas filtration system that this utility model provides by moving granular bed filter 1, it is possible to obtain the high-temperature gas of de-dirt, enters subsequent processing units and continues with；After the dust-laden filter medium that moving granular bed filter produces simultaneously is transported to filter medium deashing device 3, dust in filter medium is removed, obtain clean filter medium, then again through filter medium heater 5, supply moving granular bed filter 1 after clean filter medium heating is continuing with, thereby may be ensured that the seriality of high-temperature dusty gas dedusting, and high-temperature dusty gas dedusting cost can be reduced。

In order to decrease in the impact that filter medium is produced by the temperature decrease occurred in cleanout fluid as far as possible, improve the service life of filter medium, in preferred implementation of the present utility model, between described moving granular bed filter 1 and described filter medium deashing device 3, it is additionally provided with the chiller 7 for cold filtration medium。

Separately below each device in hot gas filtration system of the present utility model is specifically described。

Suitably with reference to shown in Fig. 3, the moving granular bed filter that this utility model provides may be configured to fill the filter housings 11 of the filter medium of heat, the top and bottom of described filter housings 11 are respectively arranged with filter charging aperture 12 and filter discharging opening 13, the both sides of described filter housings 11 are respectively arranged with filtering air inlet 14 and filter outlet mouth 15, described filtering air inlet 14 is provided with the air inlet backgauge part 16 stopping that filter medium flows out, described filter outlet mouth 15 is provided with the backgauge part 17 of giving vent to anger stopping that filter medium flows out, at described filtering air inlet 14 place, intake section 18 is installed, high-temperature dusty gas enters in described filter housings 11 after described intake section 18 and described air inlet backgauge part 16, described moving granular bed filter is additionally provided with the dust-blowing device stretching in described intake section 18 and purging to described air inlet backgauge part 16 gas, with the dust cleaning on described air inlet backgauge part 16 and filter medium fluoran stream surface place deposits。

Wherein the control of dust-blowing device can be determined according to the pressure drop of moving granular bed filter, when pressure drop arrives the maximum set, for instance 800Pa, starts dust-blowing device, when making the minima that pressure drop is reduced to setting, for instance 400Pa, stops dust-blowing device。The wherein maximum of moving granular bed filter pressure drop and minima, different for different moving granular bed filters, this maximum is between the normal pressure drop and pressure drop allowable of moving granular bed filter, and this minima is less than the normal pressure drop of moving granular bed filter。Described normal pressure drop refers to pressure drop when moving granular bed filter is in normal operating conditions, and now the efficiency of dust collection of moving granular bed filter is better, and described pressure drop allowable refers to that moving granular bed filter allows the maximum pressure drop used。

Moving granular bed filter of the present utility model is in use, first pass through filter charging aperture 12 and fill clean filter medium in filter housings 11, it is then shut off filter charging aperture 12, by regulating the flow control valve at filter discharging opening 13 place, it is possible to control the flowing velocity of filter medium。Filter medium is stopped by air inlet backgauge part 16 and backgauge part 17 of giving vent to anger at filtering air inlet 14 and filter outlet mouth 15 place, in order to avoid spilling in filter housings 11, after high-temperature dusty gas enters intake section 18, pass through in intake section 18, and traverse air inlet backgauge part 16, entering in filter medium, the dust in high-temperature dusty gas and filter medium inertial collision, retain, settle, spread and be captured, the high-temperature gas after dedusting is discharged from filter outlet mouth 15 through backgauge part 17 of giving vent to anger。At the initial stage that moving granular bed filter uses, filter medium bed is cleaner, efficiency of dust collection is relatively low, pressure drop is also low, after using a period of time, there is dust stratification in the fluoran stream surface of filter medium, the efficiency of dust collection of filter medium bed is substantially improved, pressure drop simultaneously is consequently increased, along with being continuing with of moving granular bed filter, the dust of filter medium fluoran stream surface place deposition increases gradually, and air inlet backgauge part 16 has also settled a lot of dust stratifications, cause that the pressure drop of filter medium bed is excessive, efficiency of dust collection is reduced, this utility model by arranging dust-blowing device in intake section 18, the dust with filter medium fluoran stream surface place deposition on air inlet backgauge part 16 can be cleaned, thus giving full play to the filtration of filter medium in the scope that pressure drop allows, improve the filter efficiency of moving granular bed filter。

The shape of the filter housings 11 in this utility model can cylindric (cross section generally circular in shape) or square tube shape (being shaped as rectangle of cross section), when filtering air inlet 14 in one plane time, can make high-temperature dusty gas comparatively uniformly by filtering air inlet 14, therefore, in this utility model, it is preferable that filter housings 11 be shaped as square tube shape。Further, the bottom (being specially the lower section at filtering air inlet 14 and filter outlet mouth 15) of described filter housings 11 adopts up big and down small pyramidal structure, and filter discharging opening 13 is positioned at the bottom of pyramidal structure。

In this utility model, described air inlet backgauge part 16 and backgauge part 17 of giving vent to anger can adopt the various structure having and stopping that solid particle passes through and allows gas to pass through, and e.g., adopt orifice plate or web plate。In preferred implementation of the present utility model, described air inlet backgauge part 16 is multiple flase floors being arranged on described filtering air inlet 14 place, having spacing between flase floor adjacent between two, each described flase floor is downward-sloping to stop that filter medium flows out all from outside to inside。It is parallel to each other between each flase floor, and by all welding or bolt connects or the mode such as shackle member clamping is fixed on the sidewall of filtering air inlet 14。In order to ensure that material does not spill from the space between flase floor, angle between each flase floor and horizontal plane needs the static angle of repose more than filter medium, in the present embodiment, angle between flase floor and horizontal plane is preferably 50～80 °, and the adjacent spacing between two flase floors can be 5～100 millimeters。By air inlet backgauge part 16 being set to the form of flase floor, can not only stop that filter medium spills, and the effect making high-temperature dusty gas uniform can be played。Alternatively, backgauge part 17 of giving vent to anger described in this utility model can also adopt above-mentioned flase floor form。

The direction of the gas that dust-blowing device described in this utility model is blown into is towards air inlet backgauge part 16, it is possible to effectively clean on described air inlet backgauge part 16 and the dust of filter medium fluoran stream surface place deposition。In this utility model, the gas that described dust-blowing device is blown in described intake section 18 is noble gas or nitrogen, it is preferably high temperature inert gas or high temperature compressed nitrogen, wherein high temperature refers to that temperature is 400～500 DEG C, the temperature of the gas being namely blown into is 400～500 DEG C, it is possible to the heavy component that prevents being likely in the high-temperature dusty gas caused when the gas temperature being blown into is relatively low condenses and mixed dust adheres to the filter blocks caused on air inlet backgauge part 16。Noble gas or nitrogen can form high temperature compressed noble gas after heating or high temperature compressed nitrogen is delivered in intake section 18, heater can also be set at intake section 18 place, it is fed directly to intake section after noble gas or nitrogen are passed into heating devices heat, in order to avoid the thermal losses in course of conveying, it is preferable that be arranged around heater at intake section 18。

When this utility model adopts the air inlet backgauge part 16 of flase floor form, with reference to shown in Fig. 4, in use for some time, dust stratification can be formed at flase floor, thus affecting the filter efficiency of moving granular bed filter。It should be noted that and only illustrate dust stratification in the diagram on the flase floor of the top, when actually used, all slope inwardly setting due to flase floor, therefore all can form more dust stratification in the upside of each flase floor。For this problem, with reference to shown in Fig. 4, Fig. 5, in preferred implementation of the present utility model, described dust-blowing device includes the some nozzles 20 purging gas supervisor 19 and being arranged on described purging gas supervisor 19, multiple described flase floors form multiple inlet channel, and each inlet channel place is provided with nozzle 20。By being respectively provided with nozzle 20 at each inlet channel formed by flase floor, by the high-temperature gas that nozzle 20 blows out, it is possible to the dust stratification on flase floor and filter medium fluoran stream surface place is blown away, thus ensureing the filter efficiency of filter simultaneously。

Further preferably, in order to more efficiently the dust stratification on flase floor and filter medium fluoran stream surface place is blown away, and simplify structure, the gas of side and described nozzle 20 blowout that described nozzle 20 is positioned at described inlet channel flows along described inlet channel direction, and namely the direction of the gas of nozzle 20 blowout is parallel with the length direction of flase floor。

When air inlet backgauge part adopts the structure of orifice plate, then nozzle 20 is made to purge the filter medium being positioned at fluoran stream surface near orifice plate obliquely, the dust of the deposition to clear away on orifice plate and on fluoran stream surface。

For the ease of the dust in intake section 18 is discharged, preferably, the lower end of described intake section 18 being provided with dust-collecting cavity 21, dust-collecting cavity 21 is positioned at the lower section of described dust-blowing device, it is provided with dust-exhausting port 22 in the bottom of dust-collecting cavity 21, described dust-exhausting port 22 is provided with lock gas dust exhaust。By opening lock gas dust exhaust, it is possible to the hot ash discharged through dust-exhausting port 22 is transported to precipitation pond and processes。Wherein lock gas dust exhaust can adopt stop valve of the prior art or slide valve etc. to have the structure of switching function。

Similar with the lower shape of filter housings 11, that described dust-collecting cavity 21 is big up and small down taper, the angle between the conical surface and the horizontal plane of described taper is more than the static angle of repose of dust, in order to all discharged by the dust in intake section 18。Wherein the bus of angle between the conical surface and horizontal plane and the conical surface and this bus are along the angle between the projection on this horizontal plane of the direction, vertical and horizontal face。

As it is shown on figure 3, in this utility model, described intake section 18 can be provided with the extension diameter section of the high-temperature dusty gas flow velocity for being lowered into。Described extension diameter section is between air inlet and the gas outlet of described intake section 18, and the gas outlet of described intake section 18 connects with described filtering air inlet 14。By arranging extension diameter section, it is possible to reduce the flow velocity of high-temperature gas, make the superficial gas velocity of the high-temperature dusty gas of the described filtering air inlet 14 of entrance control within the scope of 0.1～0.6m/s, too high and puncture filtering medium layer with the superficial gas velocity of avoiding high-temperature dusty gas。

Those skilled in the art should know, before entering intake section 18 at high-temperature dusty gas, if high-temperature dusty gas flow velocity is relatively low, or to entering back into intake section 18 after high-temperature dusty gas reduction of speed, make the superficial gas velocity entering the high-temperature dusty gas in intake section 18 between 0.1～0.6m/s, then extension diameter section can not be set on intake section 18。

In this utility model, described filter medium can adopt the granule of the resistance to temperature shocks such as porcelain ball, quartz sand, sand or porous zeolite, it is preferred to use inert ceramic balls。

It should be noted that when filter medium self has bigger hole, the dust stratification at the filter medium fluoran stream surface place cleaned by dust-blowing device includes the dust of deposition on the space between filter medium hole and filter medium；When the hole of filter medium self is less, for instance inert ceramic balls, then the dust stratification at the filter medium fluoran stream surface place cleaned by dust-blowing device is mainly on the space between filter medium the dust of deposition。

The thickness of bed layer (along airflow direction width) of moving granular bed filter of the present utility model can be 0.1～1m, and superficial gas velocity can be 0.1～0.6m/s, and the particle diameter of porcelain ball is 1～10mm, it is preferred to 6mm。Porcelain ball translational speed is determined depending on resistance increasing degree, for instance, when thickness of bed layer is 0.6m, the translational speed of filter medium is less than 120Kg/h。

In order to be further ensured that high-temperature dusty gas can uniformly across filter medium, in this utility model, described filter medium is preferably regular filter medium。Wherein regular filter medium refers to the filter medium that shape, size are all consistent。Owing to there is space between the filter medium of accumulation in filter housings 11, when adopting irregular filter medium, constantly move down at filter medium, in the filter course continuous renewal process of top, smaller or shape and void shape complementation filter medium can move down, fill the space between lower floor's filter medium, make the voidage voidage more than lower floor's filter medium of upper level filter medium in filter, major part air-flow passes through between the bigger upper level filter medium of voidage so that the dust removing effects of filter inner filter media reduces。Therefore the filter medium in this utility model selects regular filter medium, it is possible to be prevented effectively from the problems referred to above and the problem porosity distribution along the bed above-below direction bed of material can avoided uneven and cause system operation controllability to be deteriorated。

Below for coal gas of high temperature, in conjunction with accompanying drawing 3, the dust removal process of preferred implementation of the present utility model is illustrated:

Coal gas of high temperature containing dust and tar steam, enter in intake section 18 from the air inlet of intake section 18, then pass through the space between the flase floor arranged on filtering air inlet 14, cross-flow moving granular bed (adopting porcelain ball as filter medium) in filter housings 11, high temperature porcelain ball slowly moves down to ensure the renewal of filtering surface filtrate by being arranged on the governor valve control at filter discharging opening 13 place。Tar in coal gas, because keeping hot without condensing, passes through bed in a gaseous form, and dust then streams the hot porcelain ball in moving granular bed by gas, because of inertial collision, retain, settle, the effect such as diffusion, and be captured down。

The porcelain ball that diameter is 3mm is filled at moving granular bed filter 1 of the present utility model, and to make the thickness (airflow direction along high-temperature dusty gas) of bed be 0.3m, air inlet backgauge part 16 adopts flase floor form that moving granular bed filter 1 of the present utility model is carried out 4 groups of tests, and result is as follows:

As seen from the above table, in moving granular bed filter 1 stable operation process of the present utility model, filter pressure drop all<850Pa, filter clogging effect>98%, good filtration effect。

When continuing to pass into high-temperature dusty gas to the moving granular bed filter 1 of the 1st group, when not using dust-blowing device, after experiment carries out 40min, pressure drop reaches about 800Pa, pressure drop subsequently sharply increases, in 10min, increase to 1400Pa, even if significantly increasing porcelain ball renewal speed, still can not control pressure drop and falling after rise to technique level allowable (need < 850Pa)；Device forced outage。

Repeating the 1st group of operation, when pressure drop reaches 800Pa, use dust-blowing device to carry out soot blowing operation, 400Pa, system run all right are down in pressure drop immediately；Final efficiency 98.35%。

It follows that use dust-blowing device soot blowing can make moving granular bed filter 1 stable operation, pressure drop is in allowed band all the time, and efficiency is higher。

Below the filter medium deashing device being used for cleaning dust-laden filter medium is illustrated。

Suitably with reference to shown in Fig. 6, the filter medium deashing device that this utility model provides may be configured to the conveying assembly holding the deashing device housing 31 of cleanout fluid and being arranged in deashing device housing 31, described deashing device housing 31 is provided with filter medium import 32 and filter medium outlet 33, the two ends up and down of described conveying assembly lay respectively at described cleanout fluid liquid level more than 34 and cleanout fluid liquid level less than 34, the filter medium after being cleaned by the cleanout fluid fallen into be delivered to described filter medium outlet 33, it is additionally provided with in described deashing device housing 31 and described cleanout fluid liquid level 34 can be divided into two-part baffler 35, the two ends up and down of described conveying assembly lay respectively at the both sides of described baffler 35。

The filter medium deashing device of present embodiment is in use, continuously filter medium is delivered in the cleanout fluid in deashing device housing 31 by filter medium import 32, can dust on effective cleaned filter medium by cleanout fluid, owing to dust granule particle diameter is less, ash band can be formed and swim on cleanout fluid surface。The filter medium of dust out continues to fall in cleanout fluid, falls on conveying assembly, and filter medium is delivered to filter medium outlet 33 by conveying assembly。Owing to being provided with baffler 35, cleanout fluid liquid level 34 can be divided into two parts by baffler 35, filter medium fall on the cleanout fluid liquid level 34 of side floating have ash band, the cleanout fluid liquid level 34 of opposite side is due to the obstruct of baffler 35, for clean cleanout fluid liquid level 34。Conveyer device passes below from baffler 35, filter medium after cleaning is delivered to, below the floating cleanout fluid liquid level having ash band, the cleanout fluid liquid level not having ash band, and pass from it and be delivered to filter medium outlet 33, thus avoiding the grey band swimming on cleanout fluid to produce to pollute to the filter medium after cleaning, it is ensured that the strainability of granular-bed filter。

The cleanout fluid that filter medium deashing device of the present utility model uses can be the various liquid that can play cleaning action, and from obtaining convenient, saving cost angle, the cleanout fluid in this utility model is preferably water。

After filter medium deashing device of the present utility model uses a period of time, can floating more ash band on cleanout fluid liquid level 34。In order to ensure effective operation of this device, it is necessary to remove ash band。

In preferred implementation of the present utility model, described deashing device housing 31 is provided with overfall 36, described overfall 36 enables to cleanout fluid liquid level 34 and is separated by described baffler 35, and the lower end of described overfall 36 and described conveying assembly is positioned at the homonymy of described baffler 35。As shown in Figure 6, it is preferable that the height at overfall 36 place is roughly the same with the height at baffler 35 place, so that cleanout fluid liquid level 34 is separated by described baffler 35。By arranging overfall 36, it is possible to make the grey band swimming on cleanout fluid liquid level 34 discharge from overfall 36, enter in sedimentation tank and precipitate, thus reaching easily and effectively to process the purpose of ash band。

In preferred implementation of the present utility model, described deashing device housing 31 is additionally provided with the cleanout fluid being positioned at described conveying assembly upper end and sprays mouth 37, the filter medium being transported to described cleanout fluid liquid level more than 34 by described conveying assembly to adopt backwashing manner again to clean。By arranging sprinkling mouth 37, make sprinkling mouth just upper end to conveying assembly, can not only secondary cleaning filter medium, and can additional clean liquid。

In a preferred implementation of the present utility model, suitably referring to Fig. 6, described conveying assembly includes horizontal segment and tilting section, and described horizontal segment is positioned at described cleanout fluid liquid level less than 34 and is connected with the lower end of tilting section, and the upper end of described tilting section is positioned at described cleanout fluid liquid level more than 34。By conveying assembly is set to horizontal segment and tilting section, the filter medium fallen in cleanout fluid can be maintained on conveying assembly by horizontal segment preferably, and the filter medium on horizontal segment stably can be delivered to filter medium and export 33 places by tilting section。

Conveying assembly in this utility model can adopt various structures, such as belt conveyor, the belt of belt conveyor is provided with the fin vertical with conveying direction or groove, to avoid filter medium slide downward or rolling in course of conveying。

In preferred implementation of the present utility model, as shown in Figure 6, described conveying assembly includes for stopping orifice plate 38 that filter medium falls and the scrapper conveyor 39 around described orifice plate 38, described scrapper conveyor 39 is positioned at the lower end upper surface near described orifice plate 38 of the scraper plate above described orifice plate 38, with by the filter medium on described orifice plate 38 along described orifice plate 38 upwardly。

Owing to swimming in grey band on cleanout fluid surface after floating a period of time, part dust granule there will be sedimentation。The mode being be combined with each other by orifice plate 38 and scrapper conveyor 39 in present embodiment, it is possible to make the dust granule of sedimentation pass from the hole of orifice plate 38, it is to avoid dust granule is deposited on conveying assembly, affects the operating of conveying assembly and the cleaning performance of filter medium。

The shape in the hole of this utility model aperture plate 38 can be selected variously-shaped。As it is shown in fig. 7, the hole on orifice plate 38 is preferably elongate holes 42, and the length direction of described elongate holes 42 and described scrapper conveyor 39 to be positioned at the scraper plate moving direction above orifice plate 38 parallel。Thus when scrapper conveyor 39 upwardly filter medium, filter medium can move the top to orifice plate 38 along elongate holes 42, it is to avoid the jammed situation of filter medium occurs。It is further preferred that the top end at elongate holes 42 is provided with chamfering, so that filter medium can skid off from the top of elongate holes 42 more smoothly。

When the hole offered on orifice plate 38 is elongate holes, it is possible to orifice plate 38 is seen as grate, described grate can adopt the grid section of cylinder, reduces dust accretions, it is to avoid contaminated filter medium。

Preferably, the width of described elongate holes is 0.3～0.8 times of the average diameter of described filter medium。

When scrapper conveyor 39 works, in order to reduce the cleanout fluid resistance to scrapper conveyor 39 scraper plate, it is preferable that as shown in Figure 8, the scraper plate 43 of described scrapper conveyor 39 offers multiple through hole 44。It is further preferred that described through hole 44 is elongate holes。

The mud of the bottom of described deashing device housing 31 it is deposited on for the ease of cleaning, in preferred implementation of the present utility model, the bottom of described deashing device housing 31 is further opened with being positioned at the underflow opening 40 of the lower end of described conveying assembly, to be discharged by the mud of deposition in described deashing device housing 31。Underflow opening 40 is arranged on the lower end of conveying assembly, when scrapper conveyor works, it is possible to be positioned at the scraper plate of orifice plate 38 bottom by scrapper conveyor and mud is pushed into underflow opening 40 place, so that sludge accumulation is at underflow opening 40 place, it is simple to mud flows out from underflow opening 40。Underflow opening 40 is provided with valve, when mud cleared up by needs, it is possible to open valve, make mud flow out from underflow opening 40。

Filter medium temperature owing to falling in cleanout fluid is higher, fall at filter medium and cleanout fluid can produce a large amount of steam, in order to avoid steam is excessive, improve the working environment of filter medium deashing device periphery, preferably, the top of described deashing device housing 31 is provided with top board, to form the cavity closed in described deashing device housing 31。

In preferred implementation of the present utility model, state on conveying assembly to ensure that filter medium can drop on exactly, described filter medium is delivered in described deashing device housing 31 by filter medium conveying pipe 41, and described filter medium conveying pipe 41 is positioned at described cleanout fluid liquid level less than 34。

After filter medium is carried out by filter medium deashing device 3, then requires over filter medium heater 5 and filter medium is heated to the operating temperature meeting moving granular bed filter 1。Below filter medium heater 5 is illustrated。

Suitably with reference to shown in Fig. 9, the feed bin 51 that the filter medium heater that this utility model provides can include the heater for heating and filtering medium and the discharging opening with described heater connects, the charging aperture of described feed bin 51 and discharge outlet are separately installed with the first air-lock device 52 and the second air-lock device 53 for controlling gas and filter medium passes through, when described first air-lock device 52 is opened, described second air-lock device 53 cuts out, when described second air-lock device 53 is opened, described first air-lock device 52 cuts out, to avoid gas blowby。

The filter medium heater of present embodiment is in use, filter medium to be heated is inputted from the charging aperture of heater, by heater, filter medium is heated, when the material level of the filter medium in moving granular bed filter 1 drops to and requires supplementation with filter medium, open the first air-lock device 52, close the second air-lock device 53, the high temperature filtration medium after heating is made to fall and be full of feed bin 51, it is then shut off the first air-lock device 52, open the second air-lock device 53, filter medium is made to enter in moving granular bed filter 1, such that it is able to the high-temperature dusty gas being effectively prevented from moving granular bed filter 1 is scurried in filter medium heater to prevent from bringing in heater by dust, and it is possible to prevent the high temperature heating gas (such as high temperature nitrogen) existed in heater to enter in moving granular bed filter to avoid affecting the dust removing effects of moving granular bed filter。

It should be noted that, described feed bin 51 also acts as the effect of measurer, by arranging feed bin 51 to the feed interval (adopting excessive design if desired) providing filter medium in filter, can ensure that the piling height of moving granular bed filter 1 actual filtration body top (namely more than flase floor top) filter medium is more than the thickness of actual filtration body in filter, it is prevented that high-temperature dusty gas directly walks short circuit without filtering layer dedusting。

In this utility model, described first air-lock device 52 and the second air-lock device 53 can use the various mechanism that can play the charging aperture controlling feed bin 51 and discharging opening switch, such as stop valve, slide valve etc.。

According to actual needs, feed bin 51 can every 0.5～2 hour to moving granular bed filter 1 feed supplement once。When feed supplement interval time is longer, in order to avoid feed bin 51 sidewall reduces the temperature of the filter medium after heating, described feed bin 51 can have insulation construction, for instance the outer wall at feed bin 51 arranges fire-retardant heat insulation plate etc.。The taper that the bottom of described feed bin 51 is big up and small down。

Heater in the filter medium heater that this utility model provides can adopt various can the structure of heating and filtering medium。

A kind of preferred implementation as heater, shown in Fig. 9, Figure 10, described heater includes heater housings 54 and the air inlet pipe 55 being arranged on heater housings 54 and escape pipe 56, the gas outlet of described air inlet pipe 55 is positioned at heater housings 54, and the gas outlet of described air inlet pipe 55 is arranged down。Passing into high-temperature gas by air inlet pipe 55 in heater housings 54, high-temperature gas and filter medium are made directly heat exchange, it is possible to quickly heating and filtering medium。Wherein the gas outlet of air inlet pipe 55 is down, it is possible to avoids filter medium to be moved downwardly in air inlet pipe 55 and blocks air inlet pipe 55。

This heater is in use, filter medium enters from the charging aperture being positioned at its top, fill described heater housings 54, in heater housings 54, pass into high temperature heating gas by air inlet pipe 55 simultaneously, high temperature heating gas moves up, with filter medium generation heat exchange, heating and filtering medium, when high temperature heating gas is moved upwards up to top, discharge from the escape pipe 56 being positioned at top。

In preferred implementation of the present utility model, in order to improve the efficiency of heating surface, the bottom of described heater housings 54 is up big and down small conical section, described air inlet pipe 55 is arranged on described conical section, described air inlet pipe 55 is many and uniform along the circumference of described conical section, and the discharging opening of described heater is positioned at the bottom of described conical section。By air inlet pipe 55 is distributed on conical section, it is possible to make the filter medium by conical section be sufficiently heated。

Preferably, for the ease of adding flowing and the heating of thermal medium, the top of described heater housings 54 is cylindrical portion, and the lower end of described cylindrical portion is positioned at the upper end of described conical section and connects, and the charging aperture of described heater and described escape pipe 56 are respectively positioned on the top of described cylindrical portion。

In order to make to be distributed more uniform for the high temperature heating gas of heating and filtering medium in entrance heater, as shown in Figure 11, Figure 12, preferably, described air inlet pipe 55 includes total inlet pipe road 61 and the many branched inlet pipe roads 62 connected with described total inlet pipe road 61, and every described branched inlet pipe road 62 is provided with multiple gas outlet down。Further, many described branched inlet pipe roads 62 are uniform around the axis of described conical section in described conical section。In the present embodiment, for the ease of the connection on branched inlet pipe road 62, described total inlet pipe road 61 is goed deep into after in heater housings 54, is bent downwardly, and forms the part for connecting branched inlet pipe road 62。

Another kind of preferred implementation as heater, as shown in figure 13, described heater includes the bringing-up section 57 of open at both ends and for closing first closed section the 58, second closed section 59 of two opening ends of described bringing-up section 57, described first closed section 58 offers the charging aperture of described heater, the bottom of described second closed section 59 offers the discharging opening of described heater, described bringing-up section 57 is along sloping downwardly in the direction setting from first closed section the 58 to the second closed section 59, so that filter medium can move from the charging aperture of described heater to discharging opening。

This heater is in use, filter medium enters from the charging aperture of the first closed section 58, flow in bringing-up section 57, moves down in process heated in bringing-up section 57, after heated filter medium moves to the second closed section 59, discharge from the discharging opening of the second closed section 59。

Those skilled in the art are it is to be understood that for the ease of the turnover of filter medium, charging aperture can be opened in the top of the first closed section 58, and discharging opening can be opened in the bottom of the second closed section 59。

In this utility model, described bringing-up section 57 can be electric heater section, it would however also be possible to employ high-temperature gas is heated or heated by heat exchanger。

In order to make the filter medium homogeneous heating flow through in bringing-up section 57, it is preferable that described bringing-up section 57 is rotatably connected between described first closed section 58 and the second closed section 59, so that described bringing-up section 57 can be passed through driving device and drive rotation。The junction of bringing-up section 57 and the first closed section 58 and the second closed section 59 can arrange existing various movable sealing structure, and driving device can adopt reducing motor, the gear that is arranged on described reducing motor output shaft and the gear ring being arranged on closed section 59 and engaging with described gear。

It is further preferred that the charging aperture place of described heater is additionally provided with blanking inclined tube 60, the discharging opening of described blanking inclined tube 60 is positioned at described bringing-up section 57。Filter medium so can be made to stride across the first closed section 58, fall directly on bringing-up section 57 and be heated, the efficiency of heating surface of filter medium can be effectively improved。

In this utility model, the chiller 7 arranged between described moving granular bed filter 1 and described filter medium deashing device 3 can adopt existing various cooling structure, in order to ensure cooling effect, reduce cost, in preferred implementation of the present utility model, with reference to shown in Figure 14, described chiller 7 includes the conveying pipe 71 for delivery of filtered medium and is arranged on described conveying pipe 71 outside for cooling down the water-cooling jacket of described conveying pipe 71, described conveying pipe 71 is provided with water inlet 72 and is positioned at the outlet 73 above described water inlet 72。Cooling water enters from water inlet 72, moves up, and carries out heat exchange with the filter medium moved down in conveying pipe 71, thus reaching to the purpose of filter medium cooling。

When described filter medium heater 5 is positioned at above described filter medium deashing device 3, during to facilitate filter medium to flow downward, preferably, lifting device 8 can be set between described filter medium deashing device 3 and described filter medium heater 5, for the filter medium after deashing being delivered to described filter medium heater 5。Lifting device 8 can adopt existing multiple lifting device, such as lifting platform etc., in this utility model, it is preferred to use bucket elevator。When practical operation, it is necessary to control to enter the flowing velocity of the filter medium of bucket elevator, make bucket elevator be not completely filled with, to prevent the broken filter medium of card, for instance card crackle ware ball。

One of the present utility model embodiments, provides a kind of hot gas filtration method, comprises the following steps:

1) make heat filtering medium contact with high-temperature dusty gas cross-flow in moving granular bed filter and carry out dust removal operation, obtain dust-laden filter medium and clean high-temperature gas；

2) process dust-laden filter medium feeding filter medium deashing device carries out washing deliming, be re-fed into filter medium heater and heat up, obtain the filter medium of regeneration；

3) filter medium of described regeneration is sent into continuation dust removal operation in moving granular bed filter；

Wherein, in step 1) in, regularly blow gas to the gas channel for high-temperature dusty gas entrance arranged near the fluoran stream surface place of described moving granular bed filter, with the dust cleaning on described gas channel and filter medium fluoran stream surface place deposits。

By said method, the effective dedusting to high-temperature gas can be realized, and the regeneration of the dust-laden filter medium produced after being capable of moving granular bed filter dedusting, can effectively reduce production cost。

In the method, the moving granular bed filter used can for the moving granular bed filter of record in above-mentioned any embodiment, it is possible to use other moving granular bed filters existing。Same, filter medium deashing device and filter medium heater are except can adopting the structure in above-mentioned embodiment, it is possible to use existing any appropriate configuration。

When in the gas needing dedusting containing the material that set point is higher, such as the high-temperature hot formed after pyrolysis of coal is vented one's spleen, if the cleaning gas temperature being blown into is relatively low, pyrolysis gas then can be made to lower the temperature, causing that in pyrolysis gas, heavy constituent condenses and mixes with mixed dust, blocking pyrolysis gas enters the passage of filter gradually。Therefore, alternatively, in this utility model, the temperature of the gas blowed to described gas channel is 400～500 DEG C。

In this utility model, it is preferable that when the pressure drop of described moving granular bed is between the normal pressure drop and pressure drop allowable of described moving granular bed filter, blow gas to described gas channel。Such as, when the pressure drop allowable of moving granular bed filter is 1600Pa, when normal pressure drop is 1000Pa, then when the pressure drop of this moving granular bed filter reaches 1200Pa, then gas is blowed to described gas channel。

The situation puncturing filtering medium layer that the superficial gas velocity of the high-temperature dusty gas in order to avoid entering is excessive and is likely to occur, it is preferable that in described moving granular bed filter 1, the superficial gas velocity of the high-temperature dusty gas of entrance is controlled within the scope of 0.1～0.6m/s。

In this utility model, it is possible to purge gas along the direction becoming angle with described gas channel, collect the dust with filter medium fluoran stream surface place deposition on described gas channel, and dust is discharged in described moving granular bed filter 1。When moving granular bed filter adopts the air inlet backgauge part of flase floor form in above-mentioned embodiment, the gas of described nozzle 20 blowout flows along the length direction of described flase floor, is namely 90 degree of angles with gas channel；When air inlet backgauge part adopts the structure of orifice plate, nozzle 20 is made to purge the filter medium being positioned at fluoran stream surface near orifice plate obliquely。Collect dust to be realized by the mode arranging dust-collecting cavity recorded in above-mentioned embodiment。

The temperature that filter medium is heated by described filter medium heater is determined according to the temperature moving the filter medium that granular-bed filter requires during to high-temperature dusty gas dedusting, venting one's spleen dedusting for coal high-temperature hot, filter medium is preferably heated to 400～500 DEG C by described filter medium heater。

In order to avoid the temperature decrease of the generation impact on filter medium in cleanout fluid, before described dust-laden filter medium is delivered to described filter medium deashing device 3 deashing, by the chiller 7 in the embodiment above, described dust-laden filter medium is cooled to 100～250 DEG C。

Preferred implementation of the present utility model is described in detail above in association with accompanying drawing; but; this utility model is not limited to the detail in above-mentioned embodiment; in technology concept of the present utility model; the technical solution of the utility model can being carried out multiple simple variant, these simple variant belong to protection domain of the present utility model。

It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode。In order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by this utility model separately。

Additionally, can also carry out combination in any between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally。

Claims (10)

1. a filter medium heater, it is characterized in that, the feed bin (51) that described filter medium heater includes the heater for heating and filtering medium and the discharging opening with described heater connects, the charging aperture of described feed bin (51) and discharge outlet are separately installed with for controlling gas and the first air-lock device (52) that filter medium passes through and the second air-lock device (53), when described first air-lock device (52) is opened, described second air-lock device (53) is closed, when described second air-lock device (53) is opened, described first air-lock device (52) is closed, to avoid gas blowby。

2. filter medium heater according to claim 1, it is characterised in that described feed bin (51) has insulation construction。

3. filter medium heater according to claim 1, it is characterized in that, described heater includes heater housings (54) and the air inlet pipe (55) being arranged on heater housings (54) and escape pipe (56), the gas outlet of described air inlet pipe (55) is positioned at heater housings (54), and the gas outlet of described air inlet pipe (55) is arranged down。

4. filter medium heater according to claim 3, it is characterized in that, the bottom of described heater housings (54) is up big and down small conical section, described air inlet pipe (55) is arranged on described conical section, described air inlet pipe (55) is many and axially uniform along described conical section, and the discharging opening of described heater is positioned at the bottom of described conical section。

5. filter medium heater according to claim 3, it is characterized in that, the bottom of described heater housings (54) is up big and down small conical section, described air inlet pipe (55) is arranged on described conical section, described air inlet pipe (55) includes total inlet pipe road (61) and the many branched inlet pipe roads (62) connected with described total inlet pipe road (61), and every described branched inlet pipe road (62) is provided with multiple gas outlet down。

6. filter medium heater according to claim 5, it is characterised in that many described branched inlet pipe roads (62) are uniform around the axis of described conical section in described conical section。

7. the filter medium heater according to any one in claim 4-6, it is characterized in that, the top of described heater housings (54) is cylindrical portion, the lower end of described cylindrical portion is positioned at the upper end of described conical section and connects, and the charging aperture of described heater and described escape pipe (56) are respectively positioned on the top of described cylindrical portion。

8. filter medium heater according to claim 1, it is characterized in that, described heater includes the bringing-up section (57) of open at both ends and is used for closing first closed section (58) of two opening ends of described bringing-up section (57), second closed section (59), described first closed section (58) offers the charging aperture of described heater, the bottom of described second closed section (59) offers the discharging opening of described heater, described bringing-up section (57) is along sloping downwardly in the direction setting from the first closed section (58) to the second closed section (59), so that filter medium can move from the charging aperture of described heater to discharging opening。

9. filter medium heater according to claim 8, it is characterized in that, described bringing-up section (57) is rotatably connected between described first closed section (58) and the second closed section (59), so that described bringing-up section (57) can be passed through driving device and drive rotation。

10. filter medium heater according to claim 8, it is characterized in that, the charging aperture place of described heater is additionally provided with blanking inclined tube (60), and the discharging opening of described blanking inclined tube (60) is positioned at described bringing-up section (57)。