CN1959207A - Method for burning petroleum coke or gasified remained coke, and inner mixed type combustion equipment - Google Patents
Method for burning petroleum coke or gasified remained coke, and inner mixed type combustion equipment Download PDFInfo
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- CN1959207A CN1959207A CN 200510115426 CN200510115426A CN1959207A CN 1959207 A CN1959207 A CN 1959207A CN 200510115426 CN200510115426 CN 200510115426 CN 200510115426 A CN200510115426 A CN 200510115426A CN 1959207 A CN1959207 A CN 1959207A
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Abstract
A method for burning petroleum coke includes adding petroleum coke, wear-proof carrier particle and sulfur caring agent into internal mixed combustion chamber and mixing said materials with air there for making petroleum coke be burned there and be desulfurized then entering material into lifting tube for continuous-burning, carrying out gas-smoke separation and sending fly ash being separated out back to said chamber for being burned there cyclically. The burning device used for carrying out said method is also disclosed.
Description
Technical field
The present invention relates to Coal Chemical Industry and petrochemical technology field, be specifically a kind of main be the combustion method and the inner mixed type combustion equipment thereof of fuel with petroleum coke or gasified remained coke.
Background technology
Annual about about 600,000 tons of the high sulfur petroleum coke that produces of China, this petroleum coke can't be used for high value added products such as needle coke because of sulfur-bearing is high, and along with China's increasing of import sour crude oil amount from now on, the output of high sulfur petroleum coke can increase year by year, so the outlet of high sulfur petroleum coke becomes petroleum chemical enterprise's urgent problem.
According to the composition of petroleum coke and studies show that of basic characteristic, the petroleum coke ash content is few, fixed carbon content height, and with the coal facies ratio, the calorific value height that burning produces can be used as a kind of of great value fuel; In addition, petroleum coke can generate synthesis gas with water vapour and oxygen reaction in fluidized-bed gasification furnace, and this device will produce very thin gasified remained coke, also will be with its after-flame.Therefore, the better outlet of high sulfur petroleum coke is: (1) high sulfur petroleum coke is used for sulfur fixation combustion, produces steam and generating; (2) generating of steaming of high sulfur petroleum coke vaporizing system synthesis gas in gasification furnace, gasified remained coke burning, the formation Poly-generation technology.
Aspect the burning of high sulfur petroleum coke, since high sulfur petroleum coke sulfur content height, SO in the flue gas that burning produces
2Many, become atmosphere pollution, form the source of acid rain; Volatile matter is few, initiation temperature is high because high sulfur petroleum coke also has simultaneously, combustion characteristics index lower, required burning time of long characteristics, therefore, take suitable combustion system, efficient, the clean combustion of realizing high sulfur petroleum coke is a difficult problem of being badly in need of solution at present.Aspect petroleum coke vaporizing system synthesis gas, because petroleum coke is when gasifying in gasification furnace, the conversion ratio of carbon has only about 85%, and 15% the carbon of therefore also having an appointment is discharged from gasification furnace with surplus Jiao's form, and surplus Jiao of this partial gasification also can make fuel and produce steam or generating.But because the gasified remained coke particle diameter is too thin, on average have only 10～30 μ m, if burn with traditional CFBB, can cause the time of staying of gasified remained coke in stove too short, required initiation temperature can not set up in the incomplete combustion, stove; And because the circulating ratio of CFBB itself is lower, gasified remained coke powder footpath too carefully causes the fluidizing performance of itself poor in addition, and then circulating ratio can be lower, can seriously reduce efficiency of combustion.The method and apparatus that also is not used at present the surplus burnt fine powder of combustion gasification is seen in report, therefore, design and develop a kind of can high-efficiency cleaning burning high sulfur petroleum coke, method and apparatus that again can the efficient burning gasified remained coke is a purpose of the present invention.
The home and abroad mainly contains CFBB and two kinds of technology of riser combustion gasification to the clean combustion of high sulfur petroleum coke at present.
At the burning in circulating fluid bed boiler technical elements, abroad the CFBB (100Mwe) with full burning petroleum Jiao of the U.S. Nisco375t/h evaporation capacity of Foster-Wheeler company design-build serve as that the typical case represents.And domestic clean combustion to high sulfur petroleum coke does not also have large-scale complete set technology, and present way mainly is to introduce external complete set technology.But have a lot of problems during with the burning in circulating fluid bed boiler high sulfur petroleum coke, short as particle time of staying in fluid bed, the grey quantity of slag big, flying dust runs the easy agglomerating slagging scorification in rear portion of decreasing serious, incomplete combustion, recirculating fluidized bed and stop up, wear and tear big and circulating ratio low etc.
The problems such as agglomerating slagging scorification that have ignition and after-flame and recirculating fluidized bed rear portion during at the burning in circulating fluid bed boiler petroleum coke, the domestic patent No. is the recirculating fluidized bed that the patent of ZL01266279.8, ZL01134299.4 has designed a kind of burning petroleum coke by use, at circulation fluidized bed lower disposed insulation scuff-resistant coating, form the high-temperature region, help catching fire of petroleum coke, and air supply duct is divided into airduct road and secondary air channel road, realize fractional combustion, to reduce NO
xAnd SO
2Discharging.The fuel that this patent adopts is the fuel combination of petroleum coke and coal, and desulfurizing agent is a lime stone, and the fuel combination particle grain size is greater than 0 wide-size distribution less than 30mm, has material balance in the bed of realization, reduces the advantage of system energy consumption simultaneously.Has the shortcoming that structure is complicated, bulky, floor space is big but this recirculating fluidized bed is the same with aforesaid CFBB; And the fuel particle particle diameter that this recirculating fluidized bed adopts is thicker, is not suitable for high sulfur petroleum coke or the gasified remained coke particle of burning than small particle diameter, and time of staying weak point and fine grained within it is difficult for fluidisation because the structure of this recirculating fluidized bed can cause fine grained; This recirculating fluidized bed also has that operating gas velocity is low, the systemic circulation multiplying power is low and to shortcoming such as the capture of flying dust and circulating combustion ability be relatively poor in addition.
U.S. M.W.Kellogg company is used for the catalytic cracking riser technology transplant burning and the gasification of coal and petroleum coke.Compare with CFBB, the riser combustion technology has that operating gas velocity height, circulating ratio are big, mass transfer rate height, hot input intensity between gas-solid are big, the Ca/S operating temperature advantage that helps the high sulfur petroleum coke burning such as low when.But have again simultaneously that an endoparticle concentration is less, back-mixing is less, particle time of staying calorific value short, that the unit mass particle produced is lower, feed rate low and riser in reserve be difficult for keeping stable etc. some be unfavorable for the shortcoming of high sulfur petroleum coke or gasified remained coke burning, this technology also is in the pilot scale stage at present abroad.
Summary of the invention
Technical problem to be solved by this invention is, the method and the inner mixed type combustion equipment thereof of a kind of burning petroleum coke or gasified remained coke are provided, can efficient burning petroleum coke or gasified remained coke, can guarantee the abundant burning of petroleum coke or gasified remained coke particle and the capture and the circulating combustion of flying dust thereof, and effectively control SO
2And NO
xDischarging.
Above-mentioned technical problem of the present invention can adopt following technical scheme to solve, at characteristics such as petroleum coke or gasified remained coke particle initiation temperature height, long, the difficult combustion of after-flame required time and fluidizing performance differences, a kind of efficient, the clean burning petroleum coke of the present invention design or the method for gasified remained coke comprise the steps: that (1) adds an internal-mixing combustion chamber with petroleum coke or gasified remained coke particle with wear-resisting heat carrier particle and sulphur-fixing agent and contacts mixing with air, make petroleum coke or gasified remained coke particle burning and remove SO in the flue gas under the sulphur-fixing agent effect
2(2) unburnt petroleum coke or gasified remained coke particle being entered in the riser burns away; (3) in the riser outlet flying dust of wear-resisting heat carrier and petroleum coke or the flying dust of gasified remained coke are separated from flue gas fast, and capture in a feed bin, loop back internal-mixing combustion chamber circulating combustion fast from feed bin again.
Further, for the smoke combustion of guaranteeing to discharge complete, flue gas after separating can be carried out once once more or once above separation, wear-resisting heat carrier residual in the flue gas and petroleum coke flying dust or gasified remained coke flying dust are separated once more, and capture in feed bin, and then loop back internal-mixing combustion chamber circulating combustion fast from this feed bin.
In above-mentioned steps (1), can earlier wear-resisting heat carrier particle be added the internal-mixing combustion chamber, heat this internal-mixing combustion chamber then, and in this internal-mixing combustion chamber air feed, make the wear-resisting heat carrier particle in it be in ciculation fluidized state, when treating that internal-mixing burning indoor temperature reaches the initiation temperature of petroleum coke, sulphur-fixing agent and petroleum coke or gasified remained coke are added in the internal-mixing combustion chamber, this petroleum coke or gasified remained coke enter the combustion desulfurization state.
In the said method of the present invention, the average grain diameter of the wear-resisting heat carrier particle that described and petroleum coke or gasified remained coke mix mutually is 100～150 μ m, and grain density is 2200～2600kg/m
3, specific heat is about 2.0kJ/kg. ℃.The petroleum coke particles particle diameter is that the wide-size distribution of 0～500 μ m distributes.The gasified remained coke grain diameter is 0～80 μ m, its average grain diameter 10～30 μ m, and grain density is 1200～1500kg/m
3Sulphur-fixing agent press Ca/S than 1～2 with petroleum coke or gasified remained coke mutually blending add in the internal-mixing combustion chamber.Initiation temperature in the internal-mixing combustion chamber is greater than 600 ℃.The best solid sulphur temperature of burning is 860～890 ℃.
In order to realize above-mentioned combustion method, the inner mixed type combustion equipment of the present invention's design comprises:
Gas distributing chamber, it has blast pipe, and is provided with gas distribution elements at this gas distributing chamber top;
The internal-mixing combustion chamber is arranged at the top of gas distribution elements, and is provided with feeder in the one side;
Riser is arranged at the top of described internal-mixing combustion chamber, is provided with at least one gas-solid quick disconnector at the top of this riser;
Feed bin, this feed bin is communicated in the internal-mixing combustion chamber of bottom by at least one circulation feed back pipe, and the solid phase outlet of described gas-solid quick disconnector is located in this feed bin, and is provided with air inlet in this feed bin bottom;
Scum pipe, it is positioned at the below of gas distributing chamber.
Internal-mixing combustion chamber among the present invention can comprise internal-mixing combustion chamber cylindrical shell and be sheathed on the interior guide shell of this internal-mixing combustion chamber cylindrical shell, be provided with circulation channel between this guide shell and the internal-mixing combustion chamber cylindrical shell.
In the present invention, the gas distribution elements at described gas distributing chamber top has the air inlet corresponding to described guide tube, and the annular space space between described internal-mixing combustion chamber cylinder inboard wall and guide shell outer wall (being outer shroud) be provided with the distribution of gas ring, and the air inflow of (encircling promptly) in this guide shell is greater than the air inflow of outer shroud.
In the present invention, described guide shell is fixed on the bottom of described internal-mixing combustion chamber cylindrical shell, and the bottom of this guide shell forms described circulation channel along circumferentially offering a plurality of rectangular notches; Perhaps have the gap between the bottom of the lower end of described guide shell and internal-mixing combustion chamber cylindrical shell and be provided with, this gap forms described circulation channel.
In the present invention, as an optional embodiment, described internal-mixing combustion chamber cylindrical shell can be directly connected on the gas distributing chamber, and described circulation feed back pipe is connected on this internal-mixing combustion chamber cylindrical shell.
As the optional embodiment of another one, described internal-mixing combustion chamber also can include a gas-solid premix section, this gas-solid premix section is connected between described gas distributing chamber and the internal-mixing combustion chamber cylindrical shell, and axially corresponding to described guide shell, described feeder is arranged on this gas-solid premix section, and described circulation feed back pipe is connected on this gas-solid premix section.
In the present invention, described gas-solid quick disconnector is in series with one-level or the above cyclone separator of one-level, and the dipleg of this cyclone separator is connected in the bottom of feed bin.
In the present invention, the cyclone separator that described feed bin top also can corresponding be communicated in one-level or be in series more than the one-level, the dipleg of this cyclone separator is connected in the bottom of feed bin.
In the present invention, described feed bin can be connected in the top of described internal-mixing combustion chamber; Perhaps described feed bin and internal-mixing combustion chamber are set up in parallel.
In the present invention, the blast pipe of described gas-solid quick disconnector can be directly connected in the inlet of described cyclone separator.As the optional example of another one, the blast pipe of described gas-solid quick disconnector also can be connected in the top of described feed bin, the also corresponding top that is connected in feed bin of the inlet of described cyclone separator, thus the blast pipe of this gas-solid quick disconnector is communicated in the inlet of cyclone separator by the top correspondence of this feed bin.
In the present invention, the top of described feed bin can be provided with blast pipe, and the inlet of described cyclone separator is connected in this blast pipe.The blast pipe of described gas-solid quick disconnector can be connected in the blast pipe of described feed bin, thereby is connected with the inlet of cyclone separator by the blast pipe of this feed bin.
In the present invention, also can further be provided with control valve on the described circulation feed back pipe.
In the present invention, the top of described riser is provided with the gas-solid quick disconnector more than two or two.Described circulation feed back pipe also can be provided with more than two or two.
Utilize said method of the present invention and device, petroleum coke or the gasified remained coke close-phase circulation mixer in internal-mixing combustion chamber, bottom and top riser carry bed dilute phase section to combine and the fractional combustion mode that forms, can effectively control NO
xFormation; And, should be based on the internal-mixing combustion chamber of gas-solid close-phase circulation principle, can form the combustion desulfurization condition of petroleum coke or the strong back-mixing of gasified remained coke particle, high concentration, long residence time, and the big riser dilute phase of high mass transfer rate in top and hot input intensity is carried the bed burning zone, and unburnt petroleum coke or gasified remained coke particle are burnt away; Utilize the gas-solid quick disconnector at its top in addition, unburnt burnt grain and the most of particles such as wear-resisting heat carrier such as quartz sand that carry in the flue gas can be looped back in the lower combustion chamber, thereby form the combustion characteristics of the high circulating ratio of whole combustion system.
The invention has the advantages that: (1) adopts close-phase circulation to mix and dilute phase is carried novel combustion method and the equipment that combines, and has that operating flexibility is big, hierarchical approaches is flexible, pollutant emission is low, burning and characteristics such as sulphur efficiency height admittedly.(2) adopt quartz sand or other thermal cyclic carrier and help fluidizing reagent, the ignition that helps petroleum coke or gasified remained coke, and help particle diameter less and the petroleum coke of fluidizing performance difference or the fluidized bed combustion of gasified remained coke fine powder especially, can also prevent the agglomerating slagging scorification in device of petroleum coke or gasified remained coke, so this device is particularly suitable for the burning of the gasified remained coke of the petroleum coke of wide-size distribution and small particle diameter.(3) the gas solid separation system of the unique design of device outlet employing can effectively capture unburnt particulate, and makes its circulating combustion that carries out big multiplying power in burner, makes the drag-out of flying dust less.(4) apparatus structure is simple, compact, floor space is little, implements easily.
Description of drawings
Fig. 1 is the structural representation of inner mixed type combustion equipment embodiment 1 of the present invention;
Fig. 2 is the structural representation of inner mixed type combustion equipment embodiment 2 of the present invention;
Fig. 3 is the structural representation of inner mixed type combustion equipment embodiment 3 of the present invention;
Fig. 4 is the structural representation of inner mixed type combustion equipment embodiment 4 of the present invention;
Fig. 5 is the structural representation of inner mixed type combustion equipment embodiment 5 of the present invention.
The specific embodiment
Shown in Fig. 1-5, inner mixed type combustion equipment device of the present invention includes: gas distributing chamber 1, and it has blast pipe 13, and is provided with gas distribution elements 2 at this gas distributing chamber 1 top;
The internal-mixing combustion chamber is arranged at the top of gas distribution elements (gas distribution grid 2), and is provided with feeder 4 in the one side;
Utilize above-mentioned inner mixed type combustion equipment, the method of burning petroleum coke of the present invention or gasified remained coke is: petroleum coke or gasified remained coke particle are added an internal-mixing combustion chamber with wear-resisting heat carrier particle (for example quartz sand or other heat carriers) and sulphur-fixing agent (for example lime stone) contact mixing with air, make petroleum coke or gasified remained coke particle burning and remove SO in the flue gas under the sulphur-fixing agent effect
2Unburnt petroleum coke or gasified remained coke particle are entered in the riser 8 to burn away, in riser 8 outlets the flying dust of wear-resisting heat carrier and petroleum coke or the flying dust of gasified remained coke are separated from flue gas fast by gas-solid quick disconnector 11 then, and capture in feed bin 9, loop back the internal-mixing combustion chamber by circulation feed back pipe 12 fast from feed bin 9 again and carry out circulating combustion.
Like this, petroleum coke or the gasified remained coke close-phase circulation mixer in internal-mixing combustion chamber, bottom and top riser carry bed dilute phase section to combine and the fractional combustion mode that forms, can effectively control NO
xFormation; And, should be based on the internal-mixing combustion chamber of gas-solid close-phase circulation principle, can form the combustion desulfurization condition of petroleum coke or the strong back-mixing of gasified remained coke particle, high concentration, long residence time, and big riser 8 dilute phases of high mass transfer rate in top and hot input intensity are carried the bed burning zone, and unburnt petroleum coke or gasified remained coke particle are burnt away; Utilize the one-level or the above gas-solid quick disconnector 11 of one-level at its top in addition, unburnt burnt grain and the most of particles such as wear-resisting heat carrier such as quartz sand that carry in the flue gas can be looped back in the lower combustion chamber, thereby form the combustion characteristics of the high circulating ratio of whole combustion system.
In the present invention, for the smoke combustion of guaranteeing to discharge complete, shown in Fig. 1-5, can further make the gas-solid quick disconnector 11 series connection one-levels or the above cyclone separator 10 or 16 of one-level of inner mixed type combustion equipment, this cyclone separator 10 or 16 dipleg are connected in feed bin 9 bottoms, thereby the flue gas after will separating carries out once once more or once above separation, wear-resisting heat carrier residual in the flue gas and petroleum coke flying dust or gasified remained coke flying dust are separated once more, and capture in feed bin 9, and then loop back internal-mixing combustion chamber circulating combustion fast from this feed bin 9.In the present invention, the cyclone separator 10 that described feed bin 9 tops also can corresponding be communicated in one-level or be in series more than the one-level, the dipleg of this cyclone separator 10 is connected in the bottom of feed bin 9, thereby the flue gas on feed bin 9 tops is also separated once more, further cleanly discharges flue gas.
In the said method of the present invention, the average grain diameter of the wear-resisting heat carrier particle that described and petroleum coke or gasified remained coke mix mutually is 100～150 μ m, and grain density is 2200～2600kg/m
3, specific heat is about 2.0kJ/kg. ℃.The petroleum coke particles particle diameter is that the wide-size distribution of 0～500 μ m distributes.The gasified remained coke grain diameter is 0～80 μ m, its average grain diameter 10～30 μ m, and grain density is 1200～1500kg/m
3Sulphur-fixing agent press Ca/S than 1～2 with petroleum coke or gasified remained coke mutually blending add in the internal-mixing combustion chamber.Initiation temperature in the internal-mixing combustion chamber is greater than 600 ℃.The best solid sulphur temperature of burning is 860～890 ℃.
When using inner mixed type combustion equipment of the present invention, feed intake in the Ying Xianxiang device, detailed process is: before device is driven, in device, add a certain amount of quartz sand (wear-resisting heat carrier) with feeder 4 earlier, its feeding quantity is determined according to concrete operation operating mode, then heater and in device air feed, make the interior quartz sand particle of device be in ciculation fluidized state.When treating that temperature reaches the initiation temperature (more than 600 ℃) of petroleum coke in the device, sulphur-fixing agent lime stone and petroleum coke or gasified remained coke are pressed Ca/S than 1～2 blending mutually, with feeder 4 according to concrete feed rate to the device in continuous charging, fuel just enters combustion desulfurization state (device internal combustion temperature is 860～890 ℃) in device, this moment, device was in the state of driving fully.
In this process, wear-resisting heat carrier particle (for example quartz sand particle) absorbs a large amount of heats that petroleum coke or gasified remained coke burn and emitted on the one hand in the combustion chamber, serve as thermal cyclic carrier to provide the burning of petroleum coke or gasified remained coke required initiation temperature, as the fluidizing reagent that helps of less petroleum coke of particle diameter or gasified remained coke fine powder, make finely-ground coke fluidized bed combustion preferably on the other hand.
Also describe the present invention in conjunction with the accompanying drawings in detail below by several specific embodiments.
As shown in Figure 1, the inner mixed type combustion equipment of present embodiment, mainly by gas distributing chamber 1, gas distribution grid 2, distribution of gas ring 3,7, feeder 4, guide shell 5, internal-mixing combustion chamber cylindrical shell 6, riser 8, feed bin 9, cyclone separator 10,16, the gas-solid quick disconnector 11 of riser outlet, circulation feed back pipe 12, blast pipe 13, scum pipe 14, blast pipe 23,24, and control valve 17 constitute.In the present embodiment, the internal-mixing combustion chamber comprises internal-mixing combustion chamber cylindrical shell 6 and is placed on the interior guide shell 5 of this internal-mixing combustion chamber cylindrical shell, guide shell 5 is fixed on the gas distribution grid 2, be arranged concentric with internal-mixing combustion chamber cylindrical shell 6, guide shell 5 is divided into two combustion spaces of inner and outer rings to this internal-mixing combustion chamber, be called interior annular space in the guide shell 5, the annular space between the inwall of guide shell 5 outer walls and cylindrical shell 6 is called outer annular space.Guide shell 5 bottoms evenly have rectangular notch along the circumference orientation, the circulation channel of ring in flowing into from outer shroud as particle.
In an embodiment, the gas distribution grid 2 at described gas distributing chamber 1 top has the air inlet corresponding to described guide shell 5, and on described internal-mixing combustion chamber cylindrical shell 6, also being provided with air inlet by distribution of gas ring 7 gas distributions, the air inflow of (promptly interior annular spaces) is greater than the air inflow in the outer annular space of internal-mixing combustion chamber in this guide shell 5.Like this, the air capacity that interior ring feeds is bigger, fluidisation main air for burner, the granule materials of ring moves upward in making, the air capacity that outer shroud feeds is less, material to outer shroud plays the loosening effect of fluidisation, because the air quantity of interior ring is greater than the outer shroud air quantity, the static pressure of ring bed bottom is lower than the static pressure of outer shroud bed bottom in making, therefore, the granule materials of outer shroud flows downward and the rectangular channel by guide shell 5 bottoms enters interior ring, makes most of particle interior thus, constantly circulation between the outer shroud, petroleum coke or gasified remained coke particle are at the axle of the bags, radial direction forms strong back-mixing, and can contact with airborne oxygen for a long time and fully burning.In the internal-mixing combustion chamber, the superficial gas velocity of interior ring is 1.0～3.7m/s, and the superficial gas velocity of outer shroud is about 0.15m/s, and the diameter of the bags of guide shell 5 outlet tops becomes big, and its gas speed is 0.6～1.8m/s.
In the present embodiment, as shown in Figure 1, can be provided with control valve 17 on the described circulation feed back pipe 12.
In the present embodiment, as shown in Figure 1, cylindrical shell 6 upper ends, internal-mixing combustion chamber and riser 8 join, riser 8 outlets are joined with gas-solid quick disconnector 11, the following dipleg of gas-solid quick disconnector 11 (solid phase outlet) is imbedded below the close phase material level of feed bin 9, and the blast pipe 24 of gas-solid quick disconnector 11 joins with the inlet of cyclone separator 16.Like this, the internal-mixing combustor exit connects riser 5 and carries bed, utilizes its higher mass transfer rate and the big characteristics of heat-transfer intensity, and unburnt petroleum coke or gasified remained coke particle are burnt away; It is 6.0～12.0m/s that riser 5 is carried the superficial gas velocity of bed, and the particle intensity of circulation is 113.5～400kg/m
2.s.
In the present embodiment, as shown in Figure 1, feed bin 9 is directly connected on the internal-mixing combustion chamber cylindrical shell 6, and is provided with blast pipe 23 at these feed bin 9 tops and joins with cyclone separator 10, and the dipleg of this cyclone separator 10 is connected in below the close phase material level of feed bin 9.
In the present embodiment, as shown in Figure 1, gas-solid quick disconnector 11 and cyclone separator 10,16 all are arranged at outside the feed bin 9, and separator is external like this is convenient to install and maintenance.
The inner mixed type combustion equipment of present embodiment in use, concrete flow process is: air enters gas distributing chamber 1 by blast pipe 13, pass through the even gas distribution of gas distribution grid 2 (interior ring) in guide shell 5 then, simultaneously another road air enters outer shroud through distribution of gas ring 3 by air inlet, the air quantity that interior ring feeds is greater than the outer shroud air quantity, make the static pressure of the static pressure of outer shroud bed bottom like this greater than interior ring bed bottom, therefore the particle that is added by continuous charging device 4 constantly passes through the interior ring of rectangular channel inflow of guide shell bottom from outer shroud, formation circulation flows, and makes petroleum coke or gasified remained coke carry out the solid sulphur of circulating combustion in the internal-mixing combustion chamber.When mixed burning zone burns in the device bottom, the flue gas of part high quartz sand particle, the petroleum coke that burns incompletely or gasified remained coke particle, lime stone and generation can enter riser 8 along with the fluidization air that the bottom enters, unburnt petroleum coke or the gasified remained coke particle solid sulphur that burns away in riser.Gas and solid enter gas-solid quick disconnector 11 and carry out the one-level separation through behind the riser, and isolated solid particle enters feed bin 9 along the following dipleg of quick disconnector; The gas of being discharged by quick disconnector 11 blast pipes and small amount of solid particle (being essentially the flying dust fine powder of petroleum coke or gasified remained coke) enter cyclone separator 16 to carry out secondary and separates, and isolated particle enters into feed bin 9 along cyclone separator 16 diplegs; The high temperature clean flue gas of being discharged by cyclone separator 10,16 blast pipes then can be incorporated into boiler generation steam or propelling gas turbine engine generating.Feed bin 9 bottoms feed air in certain amount through distribution of gas ring 7 makes the high quartz sand particle in the feed bin grain fluidized with other, and follow loopback material pipe 12 and control valve 17 and mix the combustion chamber in flowing into, the fuel particle that is added by feeder 4 is just descending fire burns at the high temperature action of quartz sand thermal cyclic carrier like this, the flying dust that returns from feed bin 9 circulates in the internal-mixing combustion chamber and fires simultaneously, until after-flame.Lime-ash that produces in the combustion process and calcium sulfate are then discharged through scum pipe 14.
As shown in Figure 2, the inner mixed type combustion equipment of present embodiment also mainly is made of gas distributing chamber 1, gas distribution grid 2, distribution of gas ring 3,7, feeder 4, guide shell 5, internal-mixing combustion chamber cylindrical shell 6, riser 8, feed bin 9, cyclone separator 10, gas-solid quick disconnector 11, circulation feed back pipe 12, blast pipe 13 and scum pipe 14.
The basic structure of present embodiment is identical with embodiment 1 with workflow, is not described in detail in this.As shown in Figure 2, present embodiment and embodiment 1 are in the difference of structure, in the present embodiment, leave the circulation channel that certain clearance is inwardly encircled as the outer shroud grain flow between guide shell 5 lower ends and the bottom gas distribution grid 2.
As shown in Figure 2, in the present embodiment, gas-solid quick disconnector 11 and cyclone separator 10 all are built in the feed bin 9, thereby structurally become more compact than embodiment 1, and have reduced the thermal loss in the burner.And, in the present embodiment, because gas-solid quick disconnector 11 and cyclone separator 10 all are built in the feed bin 9, the flue gas of discharging from gas-solid quick disconnector 11 and the flue gas on feed bin 9 tops all can separate once more by cyclone separator 10, thereby have reduced the use of one group of cyclone separator.
As shown in Figure 3, the inner mixed type combustion equipment of present embodiment mainly is made of gas distributing chamber 1, gas distribution grid 2, distribution of gas ring 3,7, feeder 4, guide shell 5, internal-mixing combustion chamber cylindrical shell 6, riser 8, feed bin 9, cyclone separator 10, gas-solid quick disconnector 11, circulation feed back pipe 12, blast pipe 13, scum pipe 14, gas-solid premix section 15 and control valve 17.
The basic structure of present embodiment is identical with embodiment 2 with workflow, is not described in detail in this.As shown in Figure 3, present embodiment and embodiment 2 are that in the difference of structure in the present embodiment, described internal-mixing combustion chamber also comprises a gas-solid premix section 15, and this gas-solid premix section 15 is connected between internal-mixing combustion chamber cylindrical shell 6 and the gas distributing chamber 1.The particle that is returned by circulation feed back pipe 12 at first enters in the premix section 15 like this, make on the one hand the fine graineds such as flying dust that return from circulation feed back pipe premix section 15, at first carry out to a certain degree burning, enter into the internal-mixing combustion chambers burn on top again, can prolong the fine grain time of staying greatly like this and guarantee after-flame; Petroleum coke or gasified remained coke particle that quartz sand heat carrier and feeder 4 are added carry out enough heat exchange, burning earlier in this gas-solid premix section 15, and can further prolong the petroleum coke or the time of staying of gasified remained coke particle bottom burner.
As shown in Figure 4, the inner mixed type combustion equipment of present embodiment is mainly by gas distributing chamber 1,22, gas distribution grid 2,19, distribution of gas ring 3, feeder 4, guide shell 5, internal-mixing combustion chamber cylindrical shell 6, riser 8, feed bin 9, cyclone separator 10, gas-solid quick disconnector 11, circulation feed back pipe 12, blast pipe 13, scum pipe 14,21, gas-solid premix section 15, control valve 17, blast pipe 23,24 and blast pipe 20 constitute.
The basic structure of present embodiment is identical with embodiment 3 with workflow, is not described in detail in this.As shown in Figure 4, present embodiment and embodiment 3 are in the difference of structure, in the present embodiment, feed bin 9 is taken off from top, internal-mixing combustion chamber, carrying the bed burning zone to be mode arranged side by side with internal-mixing combustion chamber and riser 8 arranges, can increase the particle reserve in the feed bin 9 like this, make the circulating ratio adjustable range of whole apparatus system wideer, the device operating flexibility is big.
In the present embodiment, the bottom of this feed bin 9 is provided with the gas distributing chamber 22 that is similar to gas distributing chamber 1, the bottom of this gas distributing chamber 22 is provided with gas distribution grid 19 gas distribution in feed bin 9, and this gas distributing chamber 22 is provided with blast pipe 20, by this blast pipe 20 air feed in this gas distributing chamber 22.The below of this gas distributing chamber 22 also can be provided with scum pipe 21.
In an embodiment, the top of described feed bin 9 can be provided with blast pipe 23, and the inlet of described cyclone separator 10 is connected in this blast pipe 23.The blast pipe 24 of described gas-solid quick disconnector 11 can be connected in the blast pipe 23 of described feed bin 9, thereby is connected with the inlet of cyclone separator 10 by the blast pipe 23 of this feed bin 9.
As shown in Figure 5, the inner mixed type combustion equipment of present embodiment mainly is made of gas distributing chamber 1, gas distribution grid 2, distribution of gas ring 3,7, feeder 4, guide shell 5, internal-mixing combustion chamber cylindrical shell 6, riser 8, feed bin 9, cyclone separator 10, gas-solid quick disconnector 11, circulation feed back pipe 12, blast pipe 13, scum pipe 14 and feed bin 9 top blast pipes 23.
The basic structure of present embodiment can be identical with embodiment 1-4 with workflow, is not described in detail in this.As shown in Figure 5, the difference of present embodiment and the foregoing description 1-4 is, in the present embodiment, riser 8 exits can two gas-solid quick disconnectors 11 in parallel, can realize separating of solid particle and flue gas quickly and efficiently, reduce the race damage amount of flying dust, and reduce the segregational load of rearmounted cyclone separator.As required, this gas-solid quick disconnector 11 also can be provided with more than two, and is not shown.
As shown in Figure 5, in the present embodiment, described circulation feed back pipe 12 also can be provided with more than two or two, only show the situation of two circulation feed back pipes 12 among the figure, thereby can improve the circulating ratio of this apparatus system greatly, and circulation feed back pipe is built in burner inside, can cancel control valves such as guiding valve, makes the simpler compactness of apparatus structure.
In the above-described embodiments, only show the situation that adopts primary cyclone 10, as required, the cyclone separator that this cyclone separator 10 also can be two-stage or is in series more than the two-stage, so that gas fume after burning is carried out the multi-stage separation circulating combustion, be not described in detail in this.
Adopt combustion method of the present invention and inner mixed type combustion equipment, not only can burn wide-size distribution petroleum coke, and petroleum coke through the very thin gasified remained coke of gasification furnace gasification back gained, but also can be used for the flying dust fine powder that combusting coal fines, coal-burning boiler produce and the gasified remained coke of coke powder gained after gasification furnace gasifies etc.Therefore, combustion method of the present invention and inner mixed type combustion equipment, not only can become a kind of fuel element operation separately, form a kind of Poly-generation combination technique and operating procedure but also can match with petroleum coke gasification furnace, coal gasifier, steam boiler or gas turbine.
Above embodiment is unrestricted the present invention in order to technical scheme of the present invention to be described only, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (16)
1, the method for a kind of burning petroleum coke or gasified remained coke is characterized in that, this method comprises the steps:
(1) petroleum coke or gasified remained coke particle are added an internal-mixing combustion chamber with wear-resisting heat carrier particle and sulphur-fixing agent and contact mixing with air, make petroleum coke or gasified remained coke particle burning and under the sulphur-fixing agent effect, remove SO in the flue gas
2
(2) unburnt petroleum coke or gasified remained coke particle being entered in the riser burns away;
(3) in the riser outlet flying dust of wear-resisting heat carrier and petroleum coke or the flying dust of gasified remained coke are separated from flue gas fast, and capture in a feed bin, loop back internal-mixing combustion chamber circulating combustion fast from feed bin again.
2, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke, it is characterized in that, in above-mentioned steps (1), can earlier wear-resisting heat carrier particle be added the internal-mixing combustion chamber, heat this internal-mixing combustion chamber then, and in this internal-mixing combustion chamber air feed, make the wear-resisting heat carrier particle in it be in ciculation fluidized state, when treating that internal-mixing burning indoor temperature reaches the initiation temperature of petroleum coke, sulphur-fixing agent and petroleum coke or gasified remained coke are added in the internal-mixing combustion chamber, and this petroleum coke or gasified remained coke enter the combustion desulfurization state.
3, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke, it is characterized in that, to carry out once once more through the flue gas after step (3) is separated or the separation once, wear-resisting heat carrier residual in the flue gas and petroleum coke flying dust or gasified remained coke flying dust are separated once more, and capture in feed bin, and then loop back internal-mixing combustion chamber circulating combustion fast from this feed bin.
4, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke is characterized in that, the average grain diameter of the wear-resisting heat carrier particle that described and petroleum coke or gasified remained coke mix mutually is 100～150 μ m, and grain density is 2200～2600kg/m
3, specific heat is about 2.0kJ/kg. ℃.
5, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke is characterized in that, described petroleum coke particles particle diameter is that the wide-size distribution of 0～500 μ m distributes; Described gasified remained coke grain diameter is 0～80 μ m, its average grain diameter 10～30 μ m, and grain density is 1200～1500kg/m
3
6, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke is characterized in that, described sulphur-fixing agent press Ca/S than 1～2 with petroleum coke or gasified remained coke mutually blending add in the internal-mixing combustion chamber.
7, the method for burning petroleum coke as claimed in claim 1 or gasified remained coke is characterized in that, the initiation temperature in the internal-mixing combustion chamber is greater than 600 ℃, and the best solid sulphur temperature of burning is 860～890 ℃.
8, a kind of inner mixed type combustion equipment that adopts said method burning petroleum coke or gasified remained coke is characterized in that, this device comprises:
Gas distributing chamber, it has blast pipe, and is provided with gas distribution elements at this gas distributing chamber top;
The internal-mixing combustion chamber is arranged at the top of gas distribution elements, and is provided with feeder in the one side;
Riser is arranged at the top of described internal-mixing combustion chamber, is provided with one-level gas-solid quick disconnector at least at the top of this riser;
Feed bin, this feed bin is communicated in the internal-mixing combustion chamber of bottom by at least one circulation feed back pipe, and the solid phase outlet of described gas-solid quick disconnector is located in this feed bin, and is provided with air inlet in this feed bin bottom;
Scum pipe, it is positioned at the below of gas distributing chamber.
9, inner mixed type combustion equipment as claimed in claim 8, it is characterized in that, described internal-mixing combustion chamber comprises internal-mixing combustion chamber cylindrical shell and is sheathed on the interior guide shell of this internal-mixing combustion chamber cylindrical shell, is provided with circulation channel between this guide shell and the internal-mixing combustion chamber cylindrical shell.
10, inner mixed type combustion equipment as claimed in claim 9, it is characterized in that, the gas distribution elements at described gas distributing chamber top has the air inlet corresponding to described guide shell, and the annular space space between described internal-mixing combustion chamber cylinder inboard wall and guide shell outer wall is provided with the distribution of gas ring, and the air inflow in this guide shell is greater than the air inflow of outer shroud.
11, inner mixed type combustion equipment as claimed in claim 9 is characterized in that, described guide shell is fixed on the bottom of described internal-mixing combustion chamber cylindrical shell, and the bottom of this guide shell forms described circulation channel along circumferentially offering a plurality of rectangular notches; Perhaps have the gap between the bottom of the lower end of described guide shell and internal-mixing combustion chamber cylindrical shell and be provided with, this gap forms described circulation channel.
12, inner mixed type combustion equipment as claimed in claim 9 is characterized in that, described internal-mixing combustion chamber cylindrical shell is directly connected on the gas distributing chamber, and described circulation feed back pipe is connected on this internal-mixing combustion chamber cylindrical shell.
13, inner mixed type combustion equipment as claimed in claim 9, it is characterized in that, described internal-mixing combustion chamber also includes a gas-solid premix section, this gas-solid premix section is connected between described gas distributing chamber and the internal-mixing combustion chamber cylindrical shell, and axially corresponding to described guide shell, described feeder is arranged on this gas-solid premix section, and described circulation feed back pipe is connected on this gas-solid premix section.
14, inner mixed type combustion equipment as claimed in claim 8 is characterized in that, described circulation feed back pipe is provided with control valve.
15, inner mixed type combustion equipment as claimed in claim 8 is characterized in that, described gas-solid quick disconnector is in series with one-level or the above cyclone separator of one-level, and the dipleg of this cyclone separator is connected in the bottom of feed bin.
16, inner mixed type combustion equipment as claimed in claim 8 is characterized in that, described circulation feed back pipe is provided with more than two or two.
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| CNB2005101154262A CN100458282C (en) | 2005-11-03 | 2005-11-03 | Method for burning petroleum coke or gasified remained coke, and inner mixed type combustion equipment |
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| CNB2005101154262A CN100458282C (en) | 2005-11-03 | 2005-11-03 | Method for burning petroleum coke or gasified remained coke, and inner mixed type combustion equipment |
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| CN100458282C CN100458282C (en) | 2009-02-04 |
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Cited By (6)
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| CN102705704A (en) * | 2012-05-30 | 2012-10-03 | 上海工程技术大学 | Fume circulating system for fume impact water-spinning type LNG heating and gasifying furnace |
| CN103375796A (en) * | 2012-04-13 | 2013-10-30 | 张�诚 | Particle thermal medium heater with narrow-screening fire coal circulating fluidized beds |
| CN103555389A (en) * | 2013-11-13 | 2014-02-05 | 镇江东亚碳素焦化有限公司 | Method for avoiding coking while desulfurization of petroleum coke |
| CN104190332A (en) * | 2014-09-17 | 2014-12-10 | 中国石油大学(北京) | Multi-zone gas-solid fluidized bed reactor and system |
| CN106215816A (en) * | 2016-09-12 | 2016-12-14 | 原初科技（北京）有限公司 | Gas-solid fluidized bed calcination reactor |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03286914A (en) * | 1990-03-30 | 1991-12-17 | Ishikawajima Harima Heavy Ind Co Ltd | Circulating fluidized bed boiler |
| JP2002130637A (en) * | 2000-10-20 | 2002-05-09 | Mitsubishi Heavy Ind Ltd | Circulating fluidized bed furnace |
| JP2002295819A (en) * | 2001-03-29 | 2002-10-09 | Chugai Ro Co Ltd | Riser structure for circulating fluidized bed incinerator |
| JP2002295820A (en) * | 2001-03-29 | 2002-10-09 | Chugai Ro Co Ltd | Riser structure for circulating fluidized bed incinerator |
| CN1178021C (en) * | 2001-10-31 | 2004-12-01 | 清华大学 | Method and device for burning petroleum coke by use of circulating fluid bed |
| JP2005121342A (en) * | 2003-10-20 | 2005-05-12 | Jfe Engineering Kk | Operation method of circulating fluidized bed furnace |
| JP2005299938A (en) * | 2004-04-06 | 2005-10-27 | Mitsubishi Heavy Ind Ltd | Circulated fluidized furnace |
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- 2005-11-03 CN CNB2005101154262A patent/CN100458282C/en active Active
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| CN103375796A (en) * | 2012-04-13 | 2013-10-30 | 张�诚 | Particle thermal medium heater with narrow-screening fire coal circulating fluidized beds |
| CN102705704A (en) * | 2012-05-30 | 2012-10-03 | 上海工程技术大学 | Fume circulating system for fume impact water-spinning type LNG heating and gasifying furnace |
| CN103555389A (en) * | 2013-11-13 | 2014-02-05 | 镇江东亚碳素焦化有限公司 | Method for avoiding coking while desulfurization of petroleum coke |
| CN104190332A (en) * | 2014-09-17 | 2014-12-10 | 中国石油大学(北京) | Multi-zone gas-solid fluidized bed reactor and system |
| CN106215816A (en) * | 2016-09-12 | 2016-12-14 | 原初科技（北京）有限公司 | Gas-solid fluidized bed calcination reactor |
| CN106215816B (en) * | 2016-09-12 | 2019-05-03 | 原初科技（北京）有限公司 | Gas-solid fluidized bed calcination reactor |
| CN107726307A (en) * | 2017-11-06 | 2018-02-23 | 南京泰润电力工程有限公司 | The technique that a kind of CFB boiler mixes scoria oil coke |
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