CN104930502A - Multichannel distributing device suitable for multi-bed system circulating material balance control - Google Patents
Multichannel distributing device suitable for multi-bed system circulating material balance control Download PDFInfo
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- CN104930502A CN104930502A CN201510246887.7A CN201510246887A CN104930502A CN 104930502 A CN104930502 A CN 104930502A CN 201510246887 A CN201510246887 A CN 201510246887A CN 104930502 A CN104930502 A CN 104930502A
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- air compartment
- channel
- tapping channel
- nucleus
- feeding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a multichannel distributing device suitable for multi-bed system circulating material balance control. The multichannel distributing device comprises a feeding channel, a material distributing core region and discharge channels, wherein a wind chamber system is arranged on the bottom of the whole device; the feeding channel is communicated with a feeding hole of the material distributing core region; the discharge channels are communicated with a discharge hole of the material distributing core region; a gate valve is arranged on each discharge channel; and a plurality of air chambers, which are corresponding to the material distributing core region and each discharge channel respectively, are arranged in the air chamber system. By mainly utilizing circulation transmission characteristic of a bubbling bed and a closed pressure control principle of a moving bed, the multichannel distributing device controls feeding by a single channel and is combined with a multi-channel discharge mode to form a distributing device which realizes precise control on multi-bed system material circulating.
Description
Technical field
The present invention relates to a kind of multi-channel distribution device being suitable for many system material balances and controlling, for improving the utilization ratio of low-quality inferior fuel.
Background technology
Along with recirculating fluidized bed is in the development of coal and biomass thermal converting field, defining gradually with recycle stock is double bed, the many circulating systems such as three, four of energy circulation carrier.And the typical apply appeared on the field such as coal gasification, biomass combustion.In this process, recycle stock, the distribution of special high temperature circulation material in double bed, the many systems such as three and control are important steps in this process.Such as, in double bed system, the temperature of one of them is directly subject to the control of recycle stock in high rate cyclic process, and how matching controls the key link that secondary bed bed temperature is exactly dual bed systems stable operation.Distributor major function meets particles circulating circulation needs on the one hand, also will meet on the other hand simultaneously and prevent gas anti-channeling thus the demand meeting stabilising system pressure flow field.This process entails distributor should have flow characteristics also will have sealing characteristics.In circulating fluidized bed system, returning charge valve plays similar effect, but this device is only limitted to recycle stock effect, does not have and distributes material function.Also patent Introduction is had to have twin-channel distributing valve, Chinese invention patent 200510102904.6 discloses a kind of distributing valve with distribution function, the binary channels distribution function of material is realized by arranging numerical value flow distribution plate, but be provided with flow distribution plate in bottom, be equivalent to bottom to cut off the mobility intercepted between particle, easily cause bias current and channel, simultaneously air compartment is in function division and imperfection, the decentralised control of matching cannot be realized, add field control difficulty.Practical application effect is undesirable, and main cause is to operate in conjunction with the distributing valve of moving bed and bubbling bed mechanism comparatively to bother, and operating space is narrower.
Summary of the invention
Goal of the invention: according to domestic and international recirculating fluidized bed frontier development and many system material balance demands, the invention provides a kind of multi-channel distribution device being suitable for many system material balances and controlling, easily cause the technical problem such as bias current and channel and air compartment function distinguishing imperfection, field control difficulty are large, complex operation for the distributor solved in existing many circulating systems.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
Be suitable for the multi-channel distribution device that many system material balances control, comprise feeding-passage, material distributes nucleus and tapping channel; In the bottom of whole device with plenum system; The charging aperture that described feeding-passage distributes nucleus with material is communicated with, and the discharging opening that described tapping channel distributes nucleus with material is communicated with, and each tapping channel is provided with gate valve; Be provided with multiple air compartment in described plenum system and distribute nucleus with material respectively and each tapping channel is corresponding.
Said apparatus is applied to the Matter Transfer of many circulating systems with in distribution, although many different circulating systems have different combinations, if but the feeding-passage of this device is arranged on the material outlet of the gas-solid separating device in many circulating systems, here the solid matter outlet of gas-solid separating device can be one also can be multiple, namely feeding-passage is not limited to a stock material and enters, only require and form single discharging opening before entering this device, the tapping channel in this device is needed to be communicated with each moving bed in many circulating systems in addition, the setting of concrete communicating passage and the selection of mode of communicating can be determined according to process requirements.Material is by feeding-passage and flow into material and distribute in nucleus, by the effect of plenum system, passing into fluidized wind makes solid material present fluidisation bubbling state, here material distributes nucleus and plenum system entirety can realize with bubbling bed, realizes material and flows in corresponding tapping channel and enter in many circulating systems by controlling plenum system and formed and maintain stable duty.
Therefore, the present invention forms material by moving bed and seals the demand meeting many circulating systems and close for pressure, in conjunction with bubbling bed, static pressure is converted into the distribution function that mobilization dynamic realizes material different levels simultaneously, utilize above-mentioned two kinds of beds controlling the difference of the typical case on particle moving, form the multichannel complexity many body system flow-dividing arrangement that moving bed controls material channel, bubbling bed controls material stream passed guiding.Simultaneously in conjunction with limit wall stream and primary fluid flow and the speed difference opposite sex, by the many storehouses air compartment, the subregion air compartment that arrange, regulate the wind speed of different air compartment as required, accurate control has the flow feature of otherness fluid, realize the different balance controlling material with this of fluidized state to control in difference in functionality interval, by arranging feedback device, Optimal Control Strategy can be formed.Further cinder-discharging port is set in distributor inside, realizes circulation ash content quantitatively controlled.
Further, in the present invention, also comprise ash-unloading tube and lag cooler, described ash-unloading tube one end is communicated to the cinder-discharging port that material distributes nucleus, described cinder-discharging port is positioned at the geometric center position bottom material distribution nucleus, and the other end of ash-unloading tube is communicated to lag cooler.The diameter of cinder-discharging port is arranged to be less than feeding-passage
Further, in the present invention, described plenum system comprises a core air compartment and multiple tapping channel sidewall air compartment; Core air compartment comprises center air compartment and periphery air compartment, and wherein center air compartment is aimed at material and distributed the central area of nucleus, and periphery air compartment to be positioned at around the air compartment of center and each tapping channel corresponding; Tapping channel sidewall air compartment is corresponding with tapping channel, and the sidewall locations of aiming at tapping channel is arranged.
Further, in the present invention, described feeding-passage is set to 3 ~ 5 times of many circulating system pressure drops from entry position to the material vertical height of distributing exit position that nucleus is connected.
Further, in the present invention, described tapping channel arranges in pairs and does not arrange in pairs.As the paired setting being arranged to binary channels, four-way, Hexamermis spp wait the like, due to material fall into from feeding-passage material distribute nucleus time be equally distributed, can farthest uniform distribution material discharging from the tapping channel of each work so arrange in a pair wise manner.Consider the purposes of the urgent discharge of recycle stock, there is the demand being convenient to control stable and urgent a large amount of deslagging in stove in passage simultaneously in pairs.When described tapping channel occurs in pairs, paired passage is balance and the inhomogeneities controlling the material rate of outflow, and arrange angle between tapping channel, the projection of the angle wherein between tapping channel in perpendicular controls at 15 ° ~ 30 °.Also can be according to actual needs, do not arrange in pairs, as being arranged to the odd chanels such as single channel, triple channel, Five-channel, and the projection of each interchannel angle in perpendicular is arranged to 15 ° ~ 30 ° equally, and then the flow regime changed between each tapping channel change from symmetrical to asymmetrically distributed, reach the effect that asymmetric material distributes.Further, in the present invention, this device material feeding-passage entry shape optional square, polygon, ellipse and circular etc., but circular, be conducive to material stream passed smooth and easy.
Further, in the present invention, described feeding-passage and tapping channel are replaceable pipeline, can change the pipeline selecting different length according to processing arrangement, and the material selected is heat resistant and wear resistant stainless steel material.Be convenient to realization like this and jointly control material envelope height and passage section adjustment.
Further, in the present invention, tapping channel can be arranged on same plane, also can be arranged on the arrangement straggly of Different Plane presentation space; And tapping channel cross section is not less than feeding-passage cross section.
Beneficial effect:
A kind of multi-channel distribution device being suitable for many system material balances controls of the present invention mainly utilizes the closed pressure control principle of the circulation transmission characteristic of bubbling bed and moving bed, form a kind of distributor many system Matter Transfers being realized to accurately control by single channel control charging and in conjunction with the form of multichannel discharging, tool has the following advantages:
1, wide adaptability, can be adapted to variously to be assigned in the system of requirement material.
2, material envelope is controlled, returning charge amount is controlled, differing heights inlet pipeline can be adopted to realize material envelope highly controlled, can realize many circulating systems to different differential pressure requirements, by controlling the unloading ash capacity of cinder-discharging port, returning charge amount can be realized and control and whole many circulating system solid circle inventories.
3, subregion fluidisation, according to different air compartment function division, control different compartment pressure and flow-control respective regions fluid effect realizes subregion fluidisation, solve feeding pipe, returning charge pipeline, central area, Bian Bi region, slag dumping region, moving bed intersect the semiconvection intensity such as area different requirement from bubbling bed region and the difficulty that causes.
4, multichannel coordinated distribution material, co-simulation modeling while realizing multichannel material by the unique texture arranging different passage and material distribution nucleus, realize many systems cooperative effect functionally, maximizing and realizing many circulating systems is the demand that material distributes.
Accompanying drawing explanation
Fig. 1 represents the four-way distributor schematic diagram that a kind of four system material balances control;
Fig. 2 represents two channel bottom air compartment key diagrams;
Fig. 3 represents the partial view of left tapping channel;
Fig. 4 represents four-way distributing valve top view;
Fig. 5 represents triple channel distributing valve top view;
Fig. 6 represents the triple channel distributing valve application example being applicable to three systems.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of multi-channel distribution device being suitable for many system material balances and controlling as shown in Figure 1, for Matter Transfer and the distribution of many circulating systems, comprises feeding-passage 1, material distributes nucleus 7 and tapping channel; In the bottom of whole device with plenum system; The charging aperture that described feeding-passage 1 and material distribute nucleus 7 is communicated with, and the discharging opening that described tapping channel distributes nucleus 7 with material is communicated with, and each tapping channel is provided with gate valve; Be provided with multiple air compartment in described plenum system and distribute nucleus 7 with material respectively and each tapping channel is corresponding.Also comprise ash-unloading tube 19 and lag cooler 20, described ash-unloading tube 19 one end is communicated to the cinder-discharging port that material distributes nucleus 7, and described cinder-discharging port is positioned at the geometric center position bottom material distribution nucleus 7, and the other end of ash-unloading tube 19 is communicated to lag cooler 20.
Described plenum system comprises a core air compartment and multiple tapping channel air compartment, and wherein core air compartment and material distribute nucleus 7 and aim at, and a tapping channel air compartment is corresponding with a tapping channel; Core air compartment and tapping channel air compartment include middle air compartment and sidewall air compartment, wherein sidewall air compartment is distributed in the both sides of middle air compartment, and the center that the middle air compartment of core air compartment and material distribute nucleus 7 is aimed at, the sidewall that sidewall air compartment and the material of core air compartment distribute nucleus 7 is aimed at, the middle air compartment of tapping channel air compartment is aimed at the center of corresponding tapping channel, and the sidewall air compartment of tapping channel air compartment is aimed at the sidewall of corresponding tapping channel respectively.
Embodiment 1,
With the bottom plenum key diagram comprising two tapping channels in left and right shown in Fig. 3, multi-wind-chamber automation accuracy control method is described thus.Air compartment 9,12,14,15,16 is core air compartment, and air compartment centered by air compartment 15 wherein, air compartment 9,12,14,16 is the periphery air compartment of this center air compartment, and air compartment 14,16 is respectively to a left tapping channel and right tapping channel, air compartment 14,15,16 controls main air feed region for fluidisation, accounts for 70% of total blast volume, and middle air compartment 15 is wherein positioned near cinder-discharging port 6, and air quantity is greater than other two air compartments, at least accounts for more than 60% of core air compartment air quantity.Air compartment 8,11,10,13 is tapping channel sidewall air compartment, as shown in Figure 3, air compartment 8,11 is in alignment with the sidewall locations of left tapping channel, accordingly, air compartment 10,13 aims at the sidewall locations of right tapping channel, major function due to tapping channel sidewall air compartment is to overcome limit wall resistance, so the air quantity of these 4 air compartments accounts for 30% of total air compartment air quantity.The pipeline that all air compartments are connected all installs flow-control instrument, regulates to carry out enforcement.According to engineering experience and device loading condition, unmanned control and intellectualized operation that corresponding program can realize distributing valve are set.
Embodiment 2
A kind of occupation mode being applicable to the four-way distributing valve of four systems, as Figure 1-4, four tapping channels are respectively left tapping channel 2, right tapping channel 3, front tapping channel 4 and rear tapping channel 5, granule materials enters feeding-passage 1 by separation equipment, now, the ash-unloading tube 19 that cinder-discharging port 6 connects should be closed the stop valve be equipped with and be prevented solid material from flowing out.When high-temperature material enters material distribution nucleus 7, air compartment 9,12,14,15,16 starts to pass into fluidized wind and makes solid material present fluidisation bubbling state, and distributing valve temperature starts to raise, and ramp-up rate is slower.Now the stop valve can opened on ash-unloading tube 19 makes cold ash flow out from distributing valve.When temperature of charge in distributing valve raises very fast or temperature reach 700 DEG C, close the stop valve on ash-unloading tube 19.Open the left gate valve 18 on left tapping channel 2 simultaneously, open left side air compartment 8,11, regulate fluidized wind at fluidisation multiple about 5-7.When opening left side all air compartment 8,11, all the other tapping channels air compartment of being correlated with should be closed.After left side tapping channel 2 realizes stable operation, show that Start-up and Adjustment process terminates, open other tapping channels successively according to production technology demand, after this can maintain multichannel stable operation.
Embodiment 3
The present embodiment is applicable to the triple channel distributing valve application example of pyrolysis-drying-burning three systems, as shown in Figure 5, comprise left tapping channel 2, right tapping channel 3 and rear tapping channel 5, concrete device connects as shown in Figure 6, feeding-passage 1 connects cyclone separator 24, left tapping channel 2 connects primary air bed 21, and right tapping channel 3 connects drying bed 23, and rear tapping channel 5 connects pyrolysis bed 22.Primary air bed 21 is that solid particle obtains heat and realizes the main fluid bed of burning or gasification, can adopt air flow bed, conveying bed etc.When high-temp solid is after cyclone separator 24, enter the feeding-passage 1 of distributor.Regulate bottom plenum to realize material and enter drying bed 23, water-containing materials is dried, described drying bed 23 is communicated with primary air bed 21, pyrolysis bed 22, burn from drying bed 23 dried material out by primary air bed 21 can be entered or gasify, also can enter pyrolysis bed 22 and carry out pyrolytic gasification, can according to process requirements, material enters pyrolysis bed 22 and carries out pyrolysis and produce combustion gas in the present embodiment.Dried material mixes with by rear tapping channel 5 high-temperature solid particle out after entering pyrolysis bed 22, realizes pyrolysis and forms low moisture high heating value combustion gas.Remaining solid particle in distributor enters primary air bed 21 by left tapping channel 2 and again heats up, when solids circulation flux is inadequate, can solid carrier be supplemented, when three system internal circulating loads are excessive, can be undertaken unloading ash by cinder-discharging port 6 and distribute to balance material.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the multi-channel distribution device being suitable for many system material balances and controlling, for Matter Transfer and the distribution of many circulating systems, it is characterized in that: comprise feeding-passage (1), material distributes nucleus (7) and tapping channel; In the bottom of whole device with plenum system; The charging aperture that described feeding-passage (1) and material distribute nucleus (7) is communicated with, and the discharging opening that described tapping channel and material distribute nucleus (7) is communicated with, and each tapping channel is provided with gate valve; Be provided with in described plenum system multiple air compartment distribute nucleus (7) with material respectively and each tapping channel corresponding.
2. the multi-channel distribution device being suitable for many system material balances and controlling according to claim 1, it is characterized in that: also comprise ash-unloading tube (19) and lag cooler (20), described ash-unloading tube (19) one end is communicated to the cinder-discharging port that material distributes nucleus (7), described cinder-discharging port is positioned at the geometric center position that material distributes nucleus (7) bottom, and the other end of ash-unloading tube (19) is communicated to lag cooler (20).
3. the multi-channel distribution device being suitable for many system material balances and controlling according to claim 1, is characterized in that: described plenum system comprises a core air compartment and multiple tapping channel sidewall air compartment; Core air compartment comprises center air compartment and periphery air compartment, and wherein center air compartment aims at the central area that material distributes nucleus (7), and periphery air compartment to be positioned at around the air compartment of center and each tapping channel corresponding; Tapping channel sidewall air compartment is corresponding with tapping channel, and the sidewall locations of aiming at tapping channel is arranged.
4. according to a described multi-channel distribution device being suitable for many system material balances and controlling any in claims 1 to 3, it is characterized in that: described feeding-passage is set to 3 ~ 5 times of many circulating system pressure drops from entry position to the material vertical height of distributing the nucleus exit position that (7) are connected.
5., according to a described multi-channel distribution device being suitable for many system material balances and controlling any in claim 4, it is characterized in that: the projection of the angle between each tapping channel in perpendicular is arranged to 15 ° ~ 30 °.
6., according to a described multi-channel distribution device being suitable for many system material balances and controlling any in claim 4, it is characterized in that: described feeding-passage and tapping channel are replaceable, and the material selected is heat resistant and wear resistant stainless steel material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510246887.7A CN104930502B (en) | 2015-05-14 | 2015-05-14 | A kind of multi-channel distribution device for being applicable the material balance control of many bed body systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510246887.7A CN104930502B (en) | 2015-05-14 | 2015-05-14 | A kind of multi-channel distribution device for being applicable the material balance control of many bed body systems |
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| CN104930502A true CN104930502A (en) | 2015-09-23 |
| CN104930502B CN104930502B (en) | 2017-10-24 |
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| CN201510246887.7A Active CN104930502B (en) | 2015-05-14 | 2015-05-14 | A kind of multi-channel distribution device for being applicable the material balance control of many bed body systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688546A (en) * | 2021-12-29 | 2022-07-01 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
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| EP0452616A2 (en) * | 1990-03-10 | 1991-10-23 | Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft | Combustion method for solid or slurry-type fuels in a fluidised bed |
| CN1932378A (en) * | 2005-09-13 | 2007-03-21 | 中国科学院工程热物理研究所 | Circulating fluid bed ash pneumatic control distributing valve |
| CN102865574A (en) * | 2012-10-11 | 2013-01-09 | 中国华能集团清洁能源技术研究院有限公司 | Material returning system capable of improving distribution uniformity of materials inside large circulating fluidized bed boiler |
| CN102901093A (en) * | 2012-10-15 | 2013-01-30 | 清华大学 | Double-way controllable material returning valve for circulating fluidized bed boiler |
| CN103555355A (en) * | 2013-11-21 | 2014-02-05 | 江苏中容环保有限公司 | Device for obtaining sludge pyrolysis oil of different purposes in circulating fluidized bed reactor |
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2015
- 2015-05-14 CN CN201510246887.7A patent/CN104930502B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452616A2 (en) * | 1990-03-10 | 1991-10-23 | Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft | Combustion method for solid or slurry-type fuels in a fluidised bed |
| CN1932378A (en) * | 2005-09-13 | 2007-03-21 | 中国科学院工程热物理研究所 | Circulating fluid bed ash pneumatic control distributing valve |
| CN102865574A (en) * | 2012-10-11 | 2013-01-09 | 中国华能集团清洁能源技术研究院有限公司 | Material returning system capable of improving distribution uniformity of materials inside large circulating fluidized bed boiler |
| CN102901093A (en) * | 2012-10-15 | 2013-01-30 | 清华大学 | Double-way controllable material returning valve for circulating fluidized bed boiler |
| CN103555355A (en) * | 2013-11-21 | 2014-02-05 | 江苏中容环保有限公司 | Device for obtaining sludge pyrolysis oil of different purposes in circulating fluidized bed reactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688546A (en) * | 2021-12-29 | 2022-07-01 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
| CN114688546B (en) * | 2021-12-29 | 2023-01-10 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
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