CN1715160A - Dry coal pressure closed phase conveyer with several discharge branches - Google Patents
Dry coal pressure closed phase conveyer with several discharge branches Download PDFInfo
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- CN1715160A CN1715160A CNA2005100429183A CN200510042918A CN1715160A CN 1715160 A CN1715160 A CN 1715160A CN A2005100429183 A CNA2005100429183 A CN A2005100429183A CN 200510042918 A CN200510042918 A CN 200510042918A CN 1715160 A CN1715160 A CN 1715160A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The pressurized and closed dry coal powder conveyer with several discharge branches includes normal pressure coal portions bin; connected variable pressure bin with gas inlet connected to the nitrogen cylinder, coal powder outlet connected to pressurizing bin and gas outlet connected with filter and the pressurizing bin; pressurizing bin with gas inlet connected to the nitrogen cylinder and coal powder outlet connected to the powder distributor; and powder distributor with lower end connected to nitrogen pipeline and outlet with set shunt branch pipeline. The present invention has powder buffer connected to the pressurizing bin and no mechanical rotating part, and is suitable for closed conveying of high pressure powder. Installing the powder distributor realizes the homogeneous multiple branch conveying with one locking bin system in high overall stability and homogeneous distribution.
Description
Technical field
The invention belongs to the mass flow technique field of powder material, be specifically related to a kind of dry coal powder pressure closed phase conveyer of multiple branch circuit discharging.
Technical background
The powder Pneumatic Conveying Technology is to utilize gas energy to carry a kind of method of powder material, so far the history in existing more than 100 year.Theory and practice proof powder Pneumatic Conveying Technology has the not available preceence of mechanical transport,, flexible arrangement simple as equipment, is easy to gather dust or the like, now is widely used in industries such as electric power, metallurgy, chemical industry, building materials, light industry, food.In general, close phase powder Pneumatic Conveying Technology is compared following advantage with dilute phase powder Pneumatic Conveying Technology: 1. carry solid-gas ratio big: to carry the required delivering gas amount of a certain amount of solid material less, in existing report, the conveying solid-gas ratio of some material is up to 500, and the gas solid separation amount is little; 2. gas phase and solid flow velocity in pipeline is little, and therefore, the wearing and tearing of delivery pipe and the breakage of material are all very little; 3. delivery system good stability, because gas requirement is little, diameter of conveying pipe is little, material flow is little, for the stability of system itself provides assurance; 4. system and device is simple, and maintenance is convenient, carries same coal dust amount, and its transfer line area of passage greatly reduces, and saves raw MAT'L, and cost is low; 5. system energy consumption is low.
The 60 to 70's of last century, in the world powder Dense Phase Pneumatic Conveying Study on Technology has been reached climax, the scholar of different field inquires into the theory and practice of Dense Phase Pneumatic Conveying, has obtained many valuable achievements in research, and has developed various informative dense-phase pneumatic conveying device.The field of research that Albright et al the earliest sets foot in the concentrated phase conveying is to want that the conveying gas that pulverized coal conveying is advanced coal gasification apparatus reduces to minimum.The seventies convey materials in the fluid bed, University of Tennessee's space research eighties the coal dust of magnetic fluid generating technology combustion chamber carry and also propose same requirement.C.L.Oberg and G.A.Hood have manufactured and designed a concentrated phase feeding device system, and have obtained US Patent in 1980.This system is the hydrogenation of coal design-calculated, and system neither needs loosening wind when pulverized coal conveying, also do not need to carry wind, only relies on the pressure of Pulverized Coal Bin to carry, and the bin outlet of ball valve links to each other with delivery pipe.Subsequently, the experimenter of U.S. West Virginia Univ. has set up one and has overlapped the experimental installation system that utilizes the nitrogen pulverized coal conveying, and the conveying solid-gas ratio that obtains is 30～370.Utilize this cover system, they have studied, and pressure reduction is to the influence of pulverized coal flow between streaming tank and the producer, and operation pressure is to the ratio of pulverized coal mass flow and delivering gas rate of volume flow and the influence of solid-gas ratio in the streaming tank.In recent years, carry solid-gas ratio to carry experimental result to begin to report successively greater than 50 powder, the solid-gas ratio that the concentrated phase that has is carried is up to 500.In this respect, domestic still in the laboratory investigation stage, and abroad from the laboratory stage application that moves towards the industrialization.
In the recent period domestic many research units have produced very big interest to the Dense Phase Pneumatic Conveying technology, and especially this technology relates in integrated gasification combined cycle for power generation technology and coal gasification, coal hydrogen manufacturing, the large-scale Coal Chemical Industry industry of coal system wet goods and carry the dry coal powder continuously and stably in the dry coal powder pressure gasifying device under the operating mode of pressurizeing.Colleges and universities such as domestic Xi'an hot working research institute, East China University of Science, Southeast China University and Iron and Steel Research Geueral Inst and scientific research institutions are all in active research and exploitation dry coal powder Dense Phase Pneumatic Conveying technology.
The charging process of coal dust is to adopt the rotatory feeder valve device to carry out coal dust after the high pressure Pulverized Coal Bin to carry in the coal dust pressurized gasification process that East China University of Science is studied, this feedway with mechanical gyro units such as valve and screw feeders is unfavorable for that the powder continous-stable under the high pressure operating mode is carried.Southeast China University adopts extruding flow pattern Pneumatic conveyer, and pressurization coal supply magazine system adopts a cover lock hopper system, and normal pressure Pulverized Coal Bin, transformation powder storehouse and positive delivery powder storehouse are set, and device is set up the storehouse in the pressurization storehouse and pressed the back fluidisation, and top discharge is carried.What Iron and Steel Research Geueral Inst was taked is streaming tank single tube top discharge, regulates operational throughput by tonifying Qi.What Changzhou Hua Yuan power technology company adopted is many storehouses pump malleation dense-phase pneumatic conveying device, and the pressurization fluidisation inflated simultaneously by promptly a plurality of storehouses pump and a plurality of storehouses pump is carried simultaneously and pipeline blows stifled.
In sum, domestic existing dry coal powder dense-phase pneumatic conveying device structure more complicated, many devices are furnished with the feedway of mechanical gyro units such as valve and screw feeder, are unfavorable for that the powder under the high pressure operating mode is carried continuously; Adopt a plurality of storehouses pump to inflate simultaneously that the pressurization fluidisation is carried or a cover lock hopper system carries one road coal dust, make system complex, it is unreliable to move; Adopt lotus formula distributing box or dense phase pulverized coal distributing box, the disturbance that produces when the feed of pressurization storehouse directly produces bigger influence, reinforced homogeneity, continuity and poor stability, gasification furnace operating difficulties to lotus formula distributing box or dense phase pulverized coal distributing box; The existing feedway overwhelming majority can only one tunnel discharging, satisfy multipath discharging, must build many cover delivery systems, makes system very complicated, and cost is very high.Individual device can the two-way discharging, but homogeneity and less stable.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, the dry coal powder pressure closed phase conveyer of the multiple branch circuit discharging of problems such as a kind of dry coal powder Dense Phase Pneumatic Conveying that can solve in the dry coal powder pressure gasifying process that provides is easily stopped up, fluctuation of service.
For achieving the above object, the technical solution used in the present invention is: comprise normal pressure Pulverized Coal Bin and the transformation storehouse that is connected with the discharge of normal pressure Pulverized Coal Bin by normal pressure coal dust control cock, be characterized in, the gas access in transformation storehouse is connected with the punching press nitrogen pot by pipeline and the transformation storehouse nitrogen inlet valve that is arranged on this pipeline, the discharge in transformation storehouse is connected with the storehouse of pressurizeing by pipeline and the transformation storehouse pressurization storehouse control cock that is arranged on this pipeline, the gas vent in transformation storehouse also is connected with filter and pressurization storehouse by filter inlet control cock and pressure equalizing pipe respectively, and on pressure equalizing pipe, also be provided with the equalizing pipe control cock, the gas access in pressurization storehouse is connected with the punching press nitrogen pot by pipeline and the flow control valve that is arranged on this pipeline, the discharge in pressurization storehouse is connected with the powder distributing box by the powder energy disperser, the lower end of powder distributing box also is connected with the pressurized nitrogen pipeline by powder distributing box inlet control cock respectively, and the outlet of powder distributing box also is provided with the diverter branch pipeline.
Another characteristics of the present invention are: the downside of powder distributing box is provided with air distribution plate; The powder energy disperser is made up of the vertical decline pipeline section, horizontal pipeline section and the vertical uplift pipeline section that are communicated with successively, is respectively arranged with the loosening device that is connected with the pressurized nitrogen pipeline by loosening device control cock on vertical decline pipeline section, horizontal pipeline section and vertical uplift pipeline section; Also be provided with powder distributing box control cock on the diverter branch delivery duct; Also be provided with the filter outlet control cock on the export pipeline of filter; The outlet of punching press nitrogen pot also is provided with punching press nitrogen outlet control cock; The bottom in pressurization storehouse is provided with electronic scales; Also be provided with level-sensing device on the sidewall in pressurization storehouse.
Pressurization of the present invention is not taked mechanical rotation device behind the storehouse, but utilize the powder energy disperser to connect, and the shortcoming of having avoided adopting mechanical component can not continous-stable to carry powder is more suitable for carrying mutually in the close of high pressure powder; Loosening device has been equipped by system on the powder energy disperser, in course of conveying, be difficult for stopping up; The powder energy disperser makes powder distributing box and pressurization storehouse influence each other less in operational process; The powder distributing box of installing has realized that multiple branch circuit evenly carries, and whole process stability is good, each branch road operational throughput distributed uniform.
Description of drawings
Fig. 1 is an integral structure scheme drawing of the present invention;
Fig. 2 is the structural representation of powder distributing box 5 of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are described in further detail.
Referring to Fig. 1,2, the transformation storehouse 3 that the present invention includes normal pressure Pulverized Coal Bin 2 and be connected with the discharge of normal pressure Pulverized Coal Bin 2 by normal pressure coal dust control cock D8, the gas access in transformation storehouse 3 is connected with punching press nitrogen pot 1 by pipeline and the punching press nitrogen outlet control cock D9 and the transformation storehouse nitrogen inlet valve D2 that are arranged on this pipeline, the inlet of punching press nitrogen pot 1 also is provided with punching press nitrogen inlet control cock D1, the discharge in transformation storehouse 3 is connected with the storehouse 4 of pressurizeing by pipeline and the transformation storehouse pressurization storehouse control cock D4 that is arranged on this pipeline, the gas vent in transformation storehouse 3 also is connected with filter 7 and pressurization storehouse 4 by filter inlet control cock D6 and pressure equalizing pipe 10 respectively, and on pressure equalizing pipe 10, also be provided with equalizing pipe control cock D5, also be provided with filter outlet control cock D7 on the export pipeline of filter 7, the gas access in pressurization storehouse 4 is connected with punching press nitrogen pot 1 by the flow control valve D3 that is arranged on the pipeline between punching press nitrogen outlet control cock D9 and the storehouse nitrogen inlet control cock D2 and be arranged on this pipeline, the discharge in pressurization storehouse 4 is connected with powder distributing box 5 by powder energy disperser 8, and the bottom in pressurization storehouse 4 is provided with electronic scales 12, also be provided with level-sensing device 13 on the sidewall in pressurization storehouse 4, powder energy disperser 8 is by the vertical decline pipeline section 15 that is communicated with successively, horizontal pipeline section 16 and vertical uplift pipeline section 17 are formed, at vertical decline pipeline section 15, be respectively arranged with the loosening device 6 that is connected with pressurized nitrogen pipeline 11 by loosening device control cock D11 on horizontal pipeline section 16 and the vertical uplift pipeline section 17, and the downside at powder distributing box 5 is provided with air distribution plate 14, the lower end of powder distributing box 5 is connected with pressurized nitrogen pipeline 11 by powder distributing box inlet control cock D10 respectively, the outlet of powder distributing box 5 also is provided with diverter branch pipeline 9, also is provided with powder distributing box control cock D12 on the diverter branch delivery duct 9.
Working process of the present invention is as follows: at first open punching press nitrogen inlet control cock D1 and give punching press nitrogen pot 1 supplying nitrogen, open valve filter inlet control cock D6 and filter outlet control cock D7 then, close filter inlet control cock D6 and filter outlet control cock D7 after making the pressure in transformation storehouse 3 and external atmosphere pressure force balance; Add the proper amount of dry coal dust in normal pressure Pulverized Coal Bin 2, open normal pressure coal dust control cock D8, the dry coal powder all falls into transformation storehouse 3 by deadweight, closes normal pressure coal dust control cock D8 then; Open punching press nitrogen outlet control cock D9 and transformation storehouse nitrogen inlet control cock D2 and give 3 pressurisings of transformation storehouse, after transformation storehouse 3 pressure are identical with pressurization storehouse 4 pressure, close transformation nitrogen inlet control cock D2; Open the equalizing pipe control cock D5 on the pressure equalizing pipe 10, transformation storehouse 3 and pressurization storehouse 4 pressure are balanced each other; Pressure equalizing pipe 10 can be regulated the equilibrium of pressure between transformation storehouse 3 and the pressurization storehouse 4, guaranteed the continuous charging of pressurization storehouse 4 under the system stable operation condition, open valve transformation storehouse pressurization storehouse control cock D4, coal dust enters pressurization storehouse 4 under the deadweight effect, close transformation storehouse pressurization storehouse control cock D4 and balance management and control system valve D5 then; Regulate the nitrogen flow of flow control valve D3, the coal dust in pressurization storehouse 4 is carried; The dry coal powder enters powder distributing box 5 via powder energy disperser 8, powder energy disperser 8 is by vertical decline pipeline section 15, horizontal pipeline section 16 and vertical uplift pipeline section 17 are formed, at vertical decline pipeline section 15, be respectively arranged with the loosening device 6 that is connected with pressurized nitrogen pipeline 11 by loosening device control cock D11 on horizontal pipeline section 16 and the vertical uplift pipeline section 17, become flexible in loosening device 6 at coal dust under the effect of pressurized nitrogen pipeline 11, can not produce obstruction, powder distributing box 5 internal placement have air distribution plate, equally can be under the effect of pressurized nitrogen pipeline 11 with the coal dust local fluidization, after diverter branch delivery duct 9 is delivered to coal dust reactors such as gasification furnace, finish course of conveying, bottom in pressurization storehouse 4 is provided with electronic scales 12, also be provided with level-sensing device 13 on the sidewall in pressurization storehouse 4, when coal dust was lower than the regulation material level, system can be reinforced by electronic scales 12 and level-sensing device 13 promptings.
The present invention can realize the two-way or the multiple branch circuit feed of a cover lock hopper system, and powder distributing box 5 utilizes air distribution plate 14 to produce the method for local fluidization, and with the homogeneity that guarantees that powder quality is distributed in each road feeder sleeve, the mass flow rate deviation of each branch road output is less than ± 5%.Powder energy disperser 8 adopts vertical decline pipeline section 15, horizontal pipeline section 16 and vertical uplift pipeline section 17 3 parts to form, be in operation, powder energy disperser 8 makes powder distributing box 5 and pressurization storehouse 4 influence each other less in operational process, the disturbance that storehouse 4 produces when feed of promptly pressurizeing, can not produce bigger influence, guarantee the working stability of powder distributing box 5 powder distributing box 5.
This device is mainly used in the dry coal powder pressure gasifying device, the difficult obstruction in the course of conveying, and the coal dust conveying is continuous, steady, even, pulsation is little, has satisfied the requirement that the dry coal powder pressure gasifying apparatus system normally moves.
Claims (8)
1, a kind of dry coal powder pressure closed phase conveyer of multiple branch circuit discharging, comprise normal pressure Pulverized Coal Bin [2] and the transformation storehouse [3] that is connected with the discharge of normal pressure Pulverized Coal Bin [2] by normal pressure coal dust control cock [D8], it is characterized in that: the gas access of transformation storehouse [3] is connected with punching press nitrogen pot [1] by pipeline and the transformation storehouse nitrogen inlet valve [D2] that is arranged on this pipeline, the discharge in transformation storehouse [3] is connected with the storehouse [4] of pressurizeing by pipeline and the transformation storehouse pressurization storehouse control cock [D4] that is arranged on this pipeline, the gas vent in transformation storehouse [3] also is connected with filter [7] and pressurization storehouse [4] by filter inlet control cock [D6] and pressure equalizing pipe [10] respectively, and on pressure equalizing pipe [10], also be provided with equalizing pipe control cock [D5], the gas access in pressurization storehouse [4] is connected with punching press nitrogen pot [1] by pipeline and the flow control valve [D3] that is arranged on this pipeline, the discharge in pressurization storehouse [4] is connected with powder distributing box [5] by powder energy disperser [8], the lower end of powder distributing box [5] also is connected with pressurized nitrogen pipeline [11] by powder distributing box inlet control cock [D10] respectively, and the outlet of powder distributing box [5] also is provided with diverter branch pipeline [9].
2, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1, it is characterized in that: the downside of said powder distributing box [5] is provided with air distribution plate [14].
3, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1, it is characterized in that: said powder energy disperser [8] is made up of the vertical decline pipeline section [15], horizontal pipeline section [16] and the vertical uplift pipeline section [17] that are communicated with successively, is respectively arranged with the loosening device [6] that is connected with pressurized nitrogen pipeline [11] by loosening device control cock [D11] on vertical decline pipeline section [15], horizontal pipeline section [16] and vertical uplift pipeline section [17].
4, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1 is characterized in that: also be provided with powder distributing box control cock [D12] on the said diverter branch delivery duct [9].
5, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1 is characterized in that: also be provided with filter outlet control cock [D7] on the export pipeline of said filter [7].
6, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1 is characterized in that: said punching press nitrogen pot [1] outlet also is provided with punching press nitrogen outlet control cock [D9].
7, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1, it is characterized in that: the bottom in said pressurization storehouse [4] is provided with electronic scales [12].
8, the dry coal powder pressure closed phase conveyer of multiple branch circuit discharging according to claim 1 is characterized in that: also be provided with level-sensing device [13] on the sidewall in said pressurization storehouse [4].
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100429183A CN100450901C (en) | 2005-07-11 | 2005-07-11 | Dry coal pressure closed phase conveyer with several discharge branches |
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| CNB2005100429183A CN100450901C (en) | 2005-07-11 | 2005-07-11 | Dry coal pressure closed phase conveyer with several discharge branches |
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| CN1715160A true CN1715160A (en) | 2006-01-04 |
| CN100450901C CN100450901C (en) | 2009-01-14 |
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| CN100450901C (en) | 2009-01-14 |
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Assignee: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. Assignor: Xi'an Thermal Power Research Institute Co., Ltd. Contract record no.: 2011990000327 Denomination of invention: Dry coal pressure closed phase conveyer with several discharge branches Granted publication date: 20090114 License type: Exclusive License Open date: 20060104 Record date: 20110503 |
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