CN1274568C - Dense phase pneumatic transmission feeding device and method - Google Patents
Dense phase pneumatic transmission feeding device and method Download PDFInfo
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- CN1274568C CN1274568C CN 200510038563 CN200510038563A CN1274568C CN 1274568 C CN1274568 C CN 1274568C CN 200510038563 CN200510038563 CN 200510038563 CN 200510038563 A CN200510038563 A CN 200510038563A CN 1274568 C CN1274568 C CN 1274568C
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- coal
- coal dust
- pot
- gas
- gasifier
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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]
Abstract
The present invention relates to a dense-phase pneumatic transmission feeding device, particularly to a device and a method for supplying coal powder to a dry coal powder pressurizing gasifier by means of a dense-phase pneumatic transmission method at stable flow rate. The device uses a coal powder transmission tank (1) as a main body, wherein the top of the coal powder transmission tank (1) is provided with a transmission tank coal feeding opening (2a), a transmission tank pressure measuring opening (2b), a transmission tank pressure regulation gas inlet (2c) and a transmission tank gas exhausted opening (2d); the lower part of the coal powder transmission tank (1) is provided with an inert gas chamber (7) and a gas inlet (2e) for the inert gas chamber (7) is arranged on the wall surface of the inert gas chamber (7); the inner spaces of the inert gas chamber (7) and the coal powder transmission tank (1) are isolated by a tapered perforated plate (8) with a flat bottom. The method can stably supply coal powder to the two nozzles of the gasifier at the same time and can avoid unstable temperature in the gasifier due to unstable coal supplying quantity so as to influence an ordinary gasifying process and damage the wall. At the same time, a coal supplying system is simplified and investment is saved.
Description
Technical field
The present invention relates to a kind of Dense Phase Pneumatic Conveying method of utilizing to equipment and the method for high-temperature high-voltage reaction device, specially refer to equipment and the method for utilizing a kind of Dense Phase Pneumatic Conveying method in the dry coal powder pressure gasifying stove, to supply with coal dust with stable flow rate with stabilized quality flow rate supply powdery reactive feedstock.
Background technology
It is the prerequisite of the dry coal powder airflow bed gasifier smooth operation of pressurization that stable coal dust is supplied with.Though disclosed technology such as CN1032746A can be stably to gasifier input coal dusts, but need " keeping charge level " otherwise meeting " having influence on the coal grain flows to burner section " at least at 50% place, and for example public technology 02111205.3 needs to adopt rotatory feeder valve control feeding coal, rotating machinery complex structure under high pressure, above-mentioned technical requirements is too strict, and structure is too complicated.And above-mentioned two technology all belong to the technology at transfer pot bottom output coal dust, and are different fully with the technology at transfer pot top output coal dust of the present invention.GSP (Xu Zhengang, the palace moonlight, clean coal technology, GSP forced air bed technique and in the application prospect of China, 1998 the 4th volume the 3rd phase p9～11) the coal supply device of pressurized gasifier is at the top of jar output coal dust, but needs to be provided with a mixer in its bottom, rotatable parts is set in high-tension apparatus causes structure very complicated, easy et out of order influences the safe reliability of device; And this technology has only a coal chute coal supply, and except that the GSP gasifier, general dry coal powder pressure gasifying device all is radially arranging coal nozzle in pairs on the relative position, so the applicable surface of the coal supply method of GSP is very narrow.If adopt the GSP mode to supply with the gasifier of general twin-jet nozzle to spray, just need configuration two cover coal-supply systems, the result makes system complex, cost high.
Summary of the invention
Technical matters: the objective of the invention is to overcome above-mentioned technical problem, a kind of apparatus and method of Dense Phase Pneumatic Conveying charging are provided, this equipment and method can be evenly, stably to two of pressurized gasifiers spraying nozzle is supplied with coal dust.
Technical scheme: the device of Dense Phase Pneumatic Conveying charging of the present invention is provided with transfer pot coal-in port, transfer pot pressure tap, transfer pot pressure control gas access, transfer pot exhausr port based on coal dust conveying pot at the top of coal dust conveying pot.The air chamber of one unreactable gas is set in the bottom of described coal dust conveying pot, air inlet of air chamber is located at the air chamber side of unreactable gas, in the air chamber of unreactable gas and coal dust conveying pot jar, isolate with a flat taper breaker plate between the space, the diametrical position of flat taper breaker plate be provided with a dividing plate with the conical surface in the space be divided into two equal parts, the steel pipe of two same diameter is set in coal dust conveying pot, the following end entrance of steel pipe lays respectively at the top of two parts of breaker plate, the upper port of steel pipe is that the outlet of transfer pot upper end is drawn outside the coal dust conveying pot by the top wall of coal dust conveying pot respectively, two outlets of unreactable gas and coal dust intermixture in the formation coal dust conveying pot; Before the outlet of coal dust conveying pot upper end a regulating control is set respectively, regulating control has the input media of unreactable gas.Source of the gas connects regulating control by regulating the wind control setup; Source of the gas connects air inlet of air chamber by the fluidized wind control apparatus; Source of the gas feeds coal dust conveying pot by the transfer pot pressure-regulating device.
The unreactable gas that the present invention uses comprises nitrogen and carbon dioxide.
The present invention also provides a kind of and adopts Dense Phase Pneumatic Conveying to stablize the method for coal supply from equipment of the present invention to the coal gasifier nozzle, and this method may further comprise the steps:
A, in coal dust conveying pot, add coal dust, utilize the regulatory function of transfer pot pressure-regulating device to make the pressure in the coal dust conveying pot be higher than setting value of coal gasifier, enter the air chamber of unreactable gas through air inlet of air chamber by the fluidized wind control apparatus from the unreactable gas of the pulverized coal conveying of source of the gas (12), enter in the coal dust conveying pot equably through flat taper breaker plate again, and in jar with flat taper breaker plate above coal dust evenly mix;
B, under pressure differential between coal dust conveying pot and the coal gasifier drives, the inlet that the unreactable gas of flat taper breaker plate top and coal dust intermixture enter two inner coal chutes respectively, and upwards mobile along inner coal chute, finally enter the gasifier nozzle through regulating control and coal chute;
C, between coal dust conveying pot and coal gasifier, be provided with one the cover differential pressure measuring installation, monitoring pressure reduction between the two, the transfer pot pressure-regulating device is regulated according to the signal that differential pressure measuring installation provided, and keeps pressure reduction between coal dust conveying pot and the coal gasifier a setting value;
D, regulate coal supply amount to gasifier by changing setting pressure reduction between coal dust conveying pot and the gasifier;
E, under the control of regulating the wind control setup, enter regulating control and enter coal chute through the porous wall in the regulating control from the unreactable gas of source of the gas, mix with the compound of coal dust with the unreactable gas in the coal chute, thereby the mixture ratio of interior unreactable gas of control coal chute and coal dust is in needed value;
F, the coal dust amount drops at 40%～60% o'clock in coal dust conveying pot, and the coal dust that is in the transfer pot uniform pressure is added coal dust conveying pot, makes that whole device can be continuously and stably to the gasifier coal supply.
Beneficial effect: the close coal supply method coal supply solid-gas ratio of carrying mutually of the present invention can be up to 500kg coal dust/m
3More than the gas, high solid-gas ratio has reduced the amount of inert gas that enters gasifier, can improve the quality of coal gas product in the gasifier.Method of the present invention can stably be supplied with coal dust to two nozzles of gasification furnace simultaneously, and the instability of avoiding producing temperature because of coal supply amount instability in gasifier influences normal gasification and damaged wall, has also simplified coal-supply system simultaneously, reduces investment outlay.
Description of drawings
Fig. 1 is the normal cross section scheme drawing of the equipment of Dense Phase Pneumatic Conveying charging of the present invention.
Fig. 2 is the cross-sectional schematic at A-A place among Fig. 1.
Fig. 3 is one embodiment of the invention scheme drawings.
Have among the above figure: coal dust conveying pot 1, transfer pot coal-in port 2a, transfer pot pressure tap 2b, transfer pot pressure control gas access 2c, transfer pot exhausr port 2d, air inlet of air chamber 2e, transfer pot upper end outlet 3,3 ', regulating control 4,4 ', inner coal chute 5,5 ', dividing plate 6, the air chamber 7 of unreactable gas, flat taper breaker plate 8, unreactable gas and coal dust intermixture 9, gasifier 10, coal chute 11,11 ', source of the gas 12, fluidized wind control apparatus 13, transfer pot pressure-regulating device 14,15, regulate wind control setup 16,16 ', differential pressure measuring installation 17, flow counter 18,18 ', gasifier nozzle 19,19 '
The specific embodiment
There is the pressure container of coal powder entrance and unreactable gas and coal dust intermixture outlet at a top as coal dust conveying pot, the main body of described transfer pot is a cylindrical tube, its top connects an ellipse head, and the inlet of the inlet of a coal dust, a pressure control gas, an exhausr port and a pressure tap are arranged on described end socket; The bottom of described cylindrical tube connects a conical head, connects a columned cylindrical shell in the bottom of described conical head as air chamber, and the lower end of air chamber connects an ellipsoidal head, and the air chamber wall is provided with the inlet of unreactable gas; The flat taper breaker plate that makes progress with an opening between the space in the jar of air chamber and described transfer pot is isolated.On described taper breaker plate in-to-in diametrical position, be provided with a dividing plate with the conical surface in the space be divided into two equal parts (when having only a defeated coal export, can not establish this dividing plate), the top edge of dividing plate is concordant with the upper edge of described taper breaker plate.The steel pipe that two same diameter are set is (when having only a defeated coal export, a pipe only is set), the lower end of described steel pipe lays respectively at the top of two spaced portions in the described flat taper breaker plate and draws outside the transfer pot by the cylindrical shell wall or the ellipse head wall on transfer pot top, the lower end of described steel pipe is the inlet of unreactable gas and coal dust intermixture, and its upper end then constitutes two outlets of unreactable gas and coal dust intermixture in the defeated coal jar.The place ahead of two steel pipe outlets is provided with a regulating control respectively outside transfer pot, and regulating control has the input media of unreactable gas.
As shown in Figure 1, coal dust conveying pot 1 is a kind of equipment that is used for supplying with to pressurization dry coal powder gasification device coal dust.This equipment generally comprises: be provided with an air chamber 7 that is used for supplying with unreactable gas in coal dust conveying pot 1 in its bottom; One be used for the air chamber 7 of unreactable gas and and coal dust conveying pot 1 in-to-in unreactable gas and the coal dust intermixture 9 flat taper breaker plate 8 of isolating, unreactable gas can see through breaker plate 8 from the air chamber 7 of unreactable gas enter that coal dust conveying pot 1 is interior to be mixed with this coal dust; Two following end entrances place the inside coal chute 5,5 ' of breaker plate 8 tops, and outlet 3, the 3 ' wall by coal dust conveying pot 1 top or sidewall in transfer pot upper end stretches out outside the jar; Dividing plate 6 is located at and is used in the flat taper breaker plate 8 two inner coal chutes 5,5 ' inlet are separated; Two regulating controls 4,4 ' are located at the upstream near two inner coal chutes 5,5 ' transfer pot upper end outlet 3,3 ' respectively.
Be provided with transfer pot coal-in port 2a on the top end cover of coal dust conveying pot 1, transfer pot pressure tap 2b, transfer pot pressure control gas access 2c transfer pot exhausr port 2d are provided with air inlet of air chamber 2e on the wall of the air chamber 7 of unreactable gas.
Illustrate that below in conjunction with Fig. 3 the present invention supplies with an embodiment of coal dust method to pressurization dry coal powder gasification device.The pressure of keeping the defeated coal jar 1 of coal dust is higher than definite value (0.5 ~ 2.0MPa) of pressure of gasifier 10, add the defeated coal jar 1 of coal dust with being in the transfer pot coal-in port 2a of the coal dust identical by defeated coal jar 1 with defeated coal jar 1 pressure of coal dust, enter the air chamber 7 of unreactable gas from the unreactable gas of inertia source of the gas 12 by fluidized wind control apparatus 13, and enter in the coal dust conveying pot 1 by taper breaker plate 8.Unreactable gas evenly mixes with coal dust there.Unreactable gas and coal dust intermixture 9 enter inner coal chutes of two jars 5,5 ' inlet respectively under pressure differential between coal dust conveying pot 1 and the gasifier 10 drives, and upward movement passes through a pair of gasifier nozzle 19,19 ' that regulating control 4,4 ', transfer pot upper end outlet 3,3 ', gasifier coal chute 11,11 ' enter gasifier 10 respectively.
By the pressure reduction between differential pressure measuring installation defeated coal jar 1 of 17 measurement coal dusts and the gasifier 10, be stabilized in a needed value by pressure-regulating device 14, the 15 control coal dust conveying pots 1 of coal dust conveying pot 1 and the pressure reduction of gasifier, thereby guarantee to fail the stable of coal rate.
The concentration of coal chute 11,11 ' middle unreactable gas and coal dust intermixture and speed are measured respectively by coal power flowmeter 18,18 ', and by calculating the defeated coal rate of every coal chute.
Adjust pressure reduction between coal dust conveying pot 1 and the gasifier 10 according to flow counter 18,18 ' reading, arrive required value thereby adjust defeated coal rate.
From source of the gas 12, and the unreactable gas of adjusting to certain flow through overregulate wind control setup 16,16 ' respectively enter coal chute 11,11 ' by regulating control 4,4 ' porous tube wall respectively, thereby the mixture ratio of unreactable gas and coal dust intermixture in the adjusting coal chute.The mixture ratio of coal chute 11,11 ' middle unreactable gas and coal dust can be by flow counter 18,18 ' monitoring respectively.
Coal chute 11,11 ' caliber, length and elbow number should be identical, and be identical with the pressure drop of keeping two pipes, thereby guarantee that the defeated coal rate of two pipes is identical.If can't reach above-mentioned requirements, then resistance adjustment device should be set on pipeline, make the resistance of two pipes identical by adjusting.Resistance adjustment device can be the throttle unit of variable aperture, but then should not adopt when the tubule footpath, to avoid obstruction, can adopt this moment change delivery tube or elbow number to adjust.
Claims (2)
1. dense phase pneumatic transmission feeding device, it is characterized in that this device is based on coal dust conveying pot (1), be provided with transfer pot coal-in port (2a) at the top of coal dust conveying pot (1), transfer pot pressure tap (2b), transfer pot pressure control gas access (2c), transfer pot exhausr port (2d), the air chamber (7) of one unreactable gas is set in the bottom of described coal dust conveying pot (1), air inlet of air chamber (2e) is located at air chamber (7) wall of unreactable gas, between the inner space of the air chamber (7) of unreactable gas and coal dust conveying pot (1), isolate with a flat taper breaker plate (8), the diametrical position of flat taper breaker plate (8) be provided with a dividing plate (6) with the conical surface in the space be divided into two equal parts, 2 inner coal chutes (5 are set in coal dust conveying pot (1), 5 '), 2 inner coal chutes (5,5 ') following end entrance lays respectively at the top of breaker plate, 2 inner coal chutes (5,5 ') upper port is transfer pot upper end outlet (3,3 ') draw outside the coal dust conveying pot (1) by the top wall of coal dust conveying pot (1) respectively, constitute two outlets of middle unreactable gas of coal dust conveying pot (1) and coal dust intermixture; At transfer pot upper end outlet (3,3 ') preceding regulating control (4,4 ') that is provided with respectively, regulating control (4,4 ') has the input media of unreactable gas.Source of the gas (12) connects regulating control (4,4 ') by regulating wind control setup (16,16 '), source of the gas (12) connects air inlet of air chamber (2e) by fluidized wind control apparatus (13), and source of the gas (12) connects the transfer pot pressure control gas access (2c) of coal dust conveying pot (1) by transfer pot pressure-regulating device (15).
2, a kind of Dense Phase Pneumatic Conveying feed process that is used for the described dense phase pneumatic transmission feeding device of claim 1 is characterized in that carrying the method for charging to be:
A, in coal dust conveying pot (1), add coal dust, utilize the regulatory function of transfer pot pressure-regulating device (14,15) to make the interior pressure of coal dust conveying pot (1) be higher than the value of coal gasifier (10), enter the air chamber (7) of unreactable gas through air inlet of air chamber (2e) by fluidized wind control apparatus (13) from the unreactable gas of the pulverized coal conveying of source of the gas (12), coal dust with flat taper breaker plate (8) top again in flat taper breaker plate (8) enters coal dust conveying pot (1) equably, and in jar evenly mixes;
B, under pressure differential between coal dust conveying pot (1) and the coal gasifier (10) drives, the inlet that the unreactable gas of flat taper breaker plate (8) top and coal dust intermixture (9) enter two inner coal chutes (5,5 ') respectively, and upwards mobile along inner coal chute (5,5 '), finally enter gasifier nozzle (19,19 ') through regulating control (4,4 ') and coal chute (11,11 ');
C, between coal dust conveying pot (1) and coal gasifier (10), be provided with one the cover differential pressure measuring installation (17), monitoring pressure reduction between the two, transfer pot pressure-regulating device (14,15) is regulated according to the signal that differential pressure measuring installation (17) is provided, and keeps pressure reduction between coal dust conveying pot (1) and the coal gasifier (10) a setting value;
D, by changing setting pressure reduction adjusting between coal dust conveying pot (1) and the gasifier (10) to the coal supply amount of gasifier (10);
E, under the control of regulating wind control setup (16,16 '), enter regulating control (4,4 ') and enter coal chute (11,11 ') through the porous wall in the regulating control (4,4 ') from the unreactable gas of source of the gas (12), mix with the compound of coal dust with the unreactable gas in the coal chute (11,11 '), thereby the mixture ratio of control interior unreactable gas of coal chute (11,11 ') and coal dust is in needed value;
F, the coal dust amount drops at 40%～60% o'clock in coal dust conveying pot (1), and the coal dust that is in the transfer pot uniform pressure is added coal dust conveying pot (1), makes that whole device can be continuously and stably to gasifier (10) coal supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038563 CN1274568C (en) | 2005-03-25 | 2005-03-25 | Dense phase pneumatic transmission feeding device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038563 CN1274568C (en) | 2005-03-25 | 2005-03-25 | Dense phase pneumatic transmission feeding device and method |
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| CN1670137A CN1670137A (en) | 2005-09-21 |
| CN1274568C true CN1274568C (en) | 2006-09-13 |
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| CN 200510038563 Expired - Fee Related CN1274568C (en) | 2005-03-25 | 2005-03-25 | Dense phase pneumatic transmission feeding device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103640896A (en) * | 2013-09-12 | 2014-03-19 | 华能（天津）煤气化发电有限公司 | Dense-phase coal dust upward-conveying device long in service life |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100564206C (en) * | 2005-11-09 | 2009-12-02 | 中国科学院等离子体物理研究所 | Fixed fluidized bed powder metering and distributing delivery device and realization high stable are carried and the method for distributing powder |
| CN101747941B (en) * | 2008-12-17 | 2013-10-16 | 财团法人工业技术研究院 | Dry and wet double-purpose feeding system for gasifying equipment |
| CN102604680A (en) * | 2012-03-21 | 2012-07-25 | 清华大学 | Pulverized coal feeder |
| CN103754650B (en) * | 2014-02-10 | 2016-04-06 | 中国东方电气集团有限公司 | Based on the coal dust high pressure two-phase transportation control system of DCS |
| CN109305562B (en) * | 2018-10-09 | 2020-12-08 | 科林未来能源技术(北京)有限公司 | Storage and fluidization container and equipment for powdery material, fluidization and conveying method |
| CN109625975B (en) * | 2018-12-25 | 2020-10-27 | 西安交通大学 | Submicron particle fluidization powder feeding device |
| CN112978387A (en) * | 2021-02-05 | 2021-06-18 | 华能（天津）煤气化发电有限公司 | Pulverized coal conveying mode and device |
-
2005
- 2005-03-25 CN CN 200510038563 patent/CN1274568C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103640896A (en) * | 2013-09-12 | 2014-03-19 | 华能（天津）煤气化发电有限公司 | Dense-phase coal dust upward-conveying device long in service life |
| CN103640896B (en) * | 2013-09-12 | 2016-02-10 | 华能（天津）煤气化发电有限公司 | A kind of long life dense phase pulverized coal upper conveyor |
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| CN1670137A (en) | 2005-09-21 |
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