CN102268300B - Coal liquefaction residue and coal water slurry combined gasification nozzle and application thereof - Google Patents
Coal liquefaction residue and coal water slurry combined gasification nozzle and application thereof Download PDFInfo
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Abstract
The invention discloses a coal liquefaction residue and coal water slurry combined gasification nozzle which comprises a coal liquefaction residue pipe, a steam circular pipe, an inner circular oxygen pipe, a coal water slurry circular pipe, an outer circular oxygen pipe, a water-cooling circular pipe and a coal liquefaction residue and steam mixing chamber, wherein the coal liquefaction residue pipe, the steam circular pipe, the inner circular oxygen pipe, the coal water slurry circular pipe, the outer circular oxygen pipe and the water-cooling circular pipe are coaxially arranged from inside to outside in sequence; one end of the coal liquefaction residue and steam mixing chamber is communicated with the tail end of the coal liquefaction residue pipe, and the other end of the mixing chamber is communicated with a coal liquefaction residue and steam nozzle orifice; the wall of the mixing chamber is provided with a steam nozzle orifice which is communicated with the steam circular pipe; the tail end of the steam circular pipe is closed; the tail end of the coal water slurry circular pipe is communicated with the coal water slurry nozzle orifice; the tail end of the inner circular oxygen pipe is communicated with the inner circular oxygen nozzle orifice; and the tail end of the outer circular oxygen pipe is communicated with the outer circular oxygen nozzle orifice. By using the gasification nozzle, combined gasification of viscous heavy fuels such as molten coal liquefaction residues, high-temperature liquid-state heavy oil, residual oil and the like and coal water slurry can be realized.
Description
Technical field
The present invention relates to a kind of gasification nozzle, more specifically, relate to a kind of gasification nozzle for coal slurry gasifier.
Background technology
Air flow bed coal slurry gasifier is a kind of important coal gasification equipment, and wherein gasified raw material is water-coal-slurry shape fluid, and gasified raw material and oxygen are sent into gasification furnace via gasification nozzle, mixes fully, burning and gasification reaction in gasification furnace.Coal water slurry gasification technology realizes industrial applications the 1980s in China, has up till now tens of coal slurry gasifiers in operation, for the production of the unstripped gas of synthetic ammonia, synthesizing methanol, dimethyl ether synthesis and ICL for Indirect Coal Liquefaction liquefaction and MTO production.In air flow bed coal water slurry gasification technical process, gasification nozzle is one of key equipment wherein, and its structure and performance directly affect continuity, economy and the security of coal water slurry gasification process.
At present, coal-water-slurry gasification nozzle adopts three flow channel type structures conventionally, and the center-aisle of gasification nozzle is walked oxygen, and middle ring passage is walked water-coal-slurry, and outer ring channel is walked oxygen.Chinese patent ZL95111750.5 has disclosed a kind of three-way channel combined water coal slurry gasification nozzle with cyclone.US Patent No. 3705108 has disclosed a kind of central tube and has walked the triple channel gasification nozzle that oxygen, interior endless tube are walked moderator and go rancid-moderator of outer endless tube.
In direct coal liquefaction process process, be accompanied by the production of coal liquefaction oil product, produce a large amount of coal liquefaction residues simultaneously.In using the direct coal liquefaction process of decompression distillation, the coal liquefaction residue amount of producing accounts for 30% left and right of liquefaction feed coal quality, a large amount of coal liquefaction residue like this, its problem of complex utilization is DCL/Direct coal liquefaction project key issue urgently to be resolved hurrily always, and it utilizes technology, the economy and environment performance of degree direct influence DCL/Direct coal liquefaction process.Coal liquefaction residue has higher carbon, hydrogen content, and therefore, the coal liquefaction residue of take is burnt and can be produced synthesis gas (CO+H by gasification furnace as raw material
2) or other useful industrial chemicals gases.But, conventionally the coal liquefaction residue obtaining from DCL/Direct coal liquefaction device is high temperature (180～320 ℃) thick liquid of melting, for the thick coal liquefaction residue of this high temperature, if adopting traditional coal-water-slurry gasification nozzle to be sent into gasification furnace gasifies, can cause heat exchange between coal liquefaction residue and nozzle metallic walls and cold fluid, cause coal liquefaction residue cooling, tackify or solidify, thereby affect the flow behavior of coal liquefaction residue in nozzle, even cause spray nozzle clogging, affect the normal production of gasification furnace; If be used again after above-mentioned coal liquefaction residue is cooling, certainly will increase the cooling discharge operation of the dregs of fat and grinding step, and the cooling of coal liquefaction residue, temperature-rise period also can cause a large amount of energy losses.In addition, in petroleum industry, crude oil is sent into atmospheric distillation tower after heating (360～370 ℃), vacuum distillation tower can obtain respectively heavy oil, residual oil, heavy oil, residual oil for this high temperature thickness, if adopt traditional coal-water-slurry gasification nozzle to be sent into gasification, and combustion in gasification furnace, also have Similar Problems.
In document about coal-water-slurry gasification nozzle, the structure of different spray nozzles and serviceability are had to a lot of introductions at home and abroad, but still the coal liquefaction residue of hot method melting is not sent into together with water-coal-slurry to the report of the gasification nozzle in air flow bed coal slurry gasifier.When gasified raw material is the coal liquefaction residue of hot method melting, adopt existing coal-water-slurry gasification nozzle cannot obtain good gasification result.Therefore, a kind of coal liquefaction residue that is applicable to the melting of heat of gasification method need to be developed and also the coal liquefaction residue of hot method melting and the gasification nozzle of water-coal-slurry combined vaporizing can be realized.
Summary of the invention
One of object of the present invention is to provide a kind of novel coal liquefaction residue and water-coal-slurry combined vaporizing nozzle, adopts this nozzle can directly utilize the coal liquefaction residue of hot method melting and water-coal-slurry to carry out combined vaporizing, and can obtain good gasification result.
Another object of the present invention is to provide the application of described gasification nozzle in coal slurry gasifier.
Coal liquefaction residue provided by the present invention and water-coal-slurry combined vaporizing nozzle comprise coal liquefaction residue pipe, steam loop, interior epoxy tracheae, water-coal-slurry endless tube, outer shroud oxygen hose, water-cooled endless tube and coal liquefaction residue and steam chamber, and wherein said coal liquefaction residue pipe, steam loop, interior epoxy tracheae, water-coal-slurry endless tube, outer shroud oxygen hose and water-cooled endless tube arrive outward and coaxially arrange successively in serving as reasons; One end of described coal liquefaction residue and steam chamber is communicated with the end of coal liquefaction residue pipe, and the other end of described mixing chamber is communicated with coal liquefaction residue and steam nozzle, is provided with the steam nozzle being connected with steam loop on the locular wall of mixing chamber; The end of steam loop seals; The end of water-coal-slurry endless tube and water-coal-slurry spout connection; The end of interior epoxy tracheae and interior epoxy gas spout connection; The end of outer shroud oxygen hose and outer shroud oxygen spout connection.
According to gasification nozzle provided by the present invention preferred embodiment, between the end of coal liquefaction residue pipe and coal liquefaction residue and steam chamber, be provided with flaring passage, and be provided with tapered channels between described mixing chamber and described coal liquefaction residue and steam nozzle.The present invention there is no specific (special) requirements for the shape of described flaring passage and described tapered channels, be generally round table-like, as long as can contribute to the smooth inflow of coal liquefaction residue, for the gasification of raw material provides enough spaces, and the raw material being conducive to after gasification injects gasification furnace through coal liquefaction residue and steam nozzle.Further preferably, on the locular wall of described flaring passage, be provided with the steam nozzle being communicated with steam loop.
In gasification nozzle provided by the present invention, the shape of described coal liquefaction residue and steam chamber is not particularly limited, described mixing chamber is except comprising that, above-mentioned flaring passage and tapered channels, its main part cross section perpendicular to axial direction is generally circle.
According to the present invention one of gasification nozzle preferred embodiment the maximum radial dimension of described coal liquefaction residue and steam chamber and the diameter ratio of coal liquefaction residue pipe are 1.5～8: 1, more preferably 2～5: 1.
According to the present invention gasification nozzle another preferred embodiment, the ratio of described coal liquefaction residue and the axial height of steam chamber and the maximum radial dimension of described mixing chamber is 0.5～5: 1, more preferably 1～2.5: 1.
In the present invention, term " maximum radial dimension of coal liquefaction residue and steam chamber " refers to the maximum radial dimension of described mixing chamber inside, and term " axial height of coal liquefaction residue and steam chamber " refers to the axial height of described mixing chamber inside; Term " diameter of coal liquefaction residue pipe " refers to the internal diameter of described coal liquefaction residue pipe.
Conventionally, be arranged on the size of the steam nozzle on the locular wall of described coal liquefaction residue and steam chamber or the locular wall of described flaring passage and quantity according to the Determination of quantity of steam, and steam consumption is mainly to determine according to the inlet amount of coal liquefaction residue.Therefore, the present invention there is no specific (special) requirements for the concrete setting of position, size and the quantity of described steam nozzle, as long as be conducive to the atomization of described coal liquefaction residue.For example, all steam nozzles can be single or multiple lift settings, and every layer of steam nozzle is preferably axially and is uniformly distributed symmetrically, steam nozzle quantity >=3 of same layer; The bore size of all steam nozzles is 1～15mm, is preferably 3～10mm.
In gasification nozzle provided by the invention, the center line of described steam nozzle can be perpendicular to the locular wall setting of locular wall or the flaring passage of described coal liquefaction residue and steam chamber, also can be at a certain angle with the veritcal linearity of the locular wall of described mixing chamber or the locular wall of flaring passage.One of gasification nozzle of the present invention preferred embodiment in, the quantity of the steam nozzle of same layer is 3, the angle between the vertical line of the locular wall of the center line of described steam nozzle and described coal liquefaction residue and steam chamber is 0～25 °; Gasification nozzle of the present invention another preferred embodiment in, quantity >=4 of the steam nozzle of same layer, the angle between the vertical line of the locular wall of the center line of described steam nozzle and described coal liquefaction residue and steam chamber is 0～35 °.
In gasification nozzle provided by the invention, described water-cooled endless tube can adopt sleeve type structure, also can adopt coiled structure.
In addition, the present invention also provides the application of described gasification nozzle in coal slurry gasifier.
The application of gasification nozzle according to the present invention in coal slurry gasifier, wherein, the consumption of steam is no more than the 40wt% of the inlet amount of coal liquefaction residue; The mass ratio that enters the coal liquefaction residue of described nozzle in unit interval and enter dry coal contained in the water-coal-slurry of described nozzle in the unit interval is 1: 3-3: 1.
The application of gasification nozzle according to the present invention in coal slurry gasifier, wherein, the endotracheal oxygen volume flow of described interior epoxy accounts for the 10-50% of the oxygen volume flow sum in interior epoxy tracheae and outer shroud oxygen hose.
The application of gasification nozzle according to the present invention in coal slurry gasifier, wherein, the tail end section size of described coal liquefaction residue and steam nozzle, oxygen spout, water-coal-slurry spout is mainly to determine according to the mean flow rate of outlet material.While adopting gasification nozzle of the present invention to gasify in coal slurry gasifier, the material mean flow rate at coal liquefaction residue and steam nozzle place is 10～80m/s; The material mean flow rate of interior epoxy gas blowout mouth and outer shroud oxygen nozzle is 60～250m/s; The material mean flow rate of water-coal-slurry nozzle is 10～120m/s; The material mean flow rate at the steam nozzle place on the locular wall of the locular wall of described coal liquefaction residue and steam chamber or described flaring passage is 10～150m/s.
The application of gasification nozzle according to the present invention in coal slurry gasifier, wherein, described gasification nozzle is applicable to the thick heavy fuel such as heavy oil, residual oil of the coal liquefaction residue of hot method melting and the combined vaporizing of water-coal-slurry and high-temperature liquid state and the combined vaporizing of water-coal-slurry.
While adopting gasification nozzle provided by the invention to gasify, on the one hand, because steam loop is adjacent with coal liquefaction residue pipe, steam can provide for the coal liquefaction residue of high temperature thickness the effect of heating and thermal insulation; On the other hand, because the port of export of steam loop seals, make steam all enter coal liquefaction residue and steam chamber by steam nozzle, in this mixing chamber, coal liquefaction residue and steam fully mix, and have greatly improved the atomization of the coal liquefaction residue that enters gasification furnace.
In addition, while adopting gasification nozzle of the present invention to gasify, the thick coal liquefaction residue of high temperature can be without cooling, through charge pump pressurization, through gasification nozzle of the present invention, introduce in coal slurry gasifier together with water-coal-slurry again, broken through the single feeding manner of traditional coal slurry gasifier, for the hot method of thick heavy fuel such as the coal liquefaction residue of hot method melting, the heavy oil of high-temperature liquid state and residual oil etc., recycled and open up a new way; Gasification nozzle provided by the invention is used for to traditional coal slurry gasifier, can realize coal liquefaction residue and the water-coal-slurry charging simultaneously of hot method melting, cooling discharge and the grinding step of high-temperature viscous material have been saved, than the process that adopts existing gasification nozzle to vaporize to the first cooling down of coal liquefaction residue, rear intensification, reduce energy loss, improved energy recovery utilization rate.While there is fluctuation and then affecting the normal production of coal slurry gasifier in the production that adopts gasification nozzle of the present invention can work as coal liquefaction residue, can be by regulating the mode of water-coal-slurry inlet amount control the total feed of gasification nozzle, underload while making gasification installation can meet system to drive, the requirement under the different operating modes such as excess load at full capacity and during the operation of single stove while normally producing.In addition, gasification nozzle of the present invention also has compact conformation, the simple feature of manufacturing process, is suitable for large-scale production, and has good gasification performance, is difficult for stopping up installation, convenient disassembly.
Accompanying drawing explanation
Fig. 1 is the structural representation of an optimal way of coal liquefaction residue of the present invention and water-coal-slurry combined vaporizing nozzle;
Fig. 2 is that the A-A of structural representation of combined vaporizing nozzle is as shown in Figure 1 to view; Wherein:
1-coal liquefaction residue passage
2-steam channel
Ring oxygen channel in 3-
4-water-coal-slurry passage
5-outer shroud oxygen channel
6-cooling-water duct
7-coal liquefaction residue pipe
8-steam loop
Epoxy tracheae in 9-
10-water-coal-slurry endless tube
11-outer shroud oxygen hose
12-water-cooled endless tube
13-coal liquefaction residue and steam chamber
Epoxy gas blowout mouth in 14-
15-water-coal-slurry spout
16-outer shroud oxygen spout
17-steam nozzle
18-steam nozzle
The specific embodiment
Below in conjunction with accompanying drawing, further describe gasification nozzle provided by the present invention, but the present invention is not therefore subject to any restriction.Only otherwise depart from the scope of basic conception of the present invention and restriction, the present invention can have other distortion, for example, described " coal liquefaction residue pipe " can be the heavy fuel pipe of other high temperature thickness, described " coal liquefaction residue passage " can be the heavy fuel passage of other high temperature thickness, described " coal liquefaction residue and steam chamber " can be the heavy fuel of other high temperature thickness and the mixing chamber of steam, and described " coal liquefaction residue and steam nozzle " can be the heavy fuel of other high temperature thickness and the spout of steam.
Fig. 1 shows according to a kind of preferred gasification nozzle of the present invention.As shown in Figure 1, gasification nozzle comprises from inside to outside the coaxial coal liquefaction residue pipe 7 arranging successively, steam loop 8, interior epoxy tracheae 9, water-coal-slurry endless tube 10 and outer shroud oxygen hose 11, it between each stream tube, is plug in construction, in coal liquefaction residue pipe 7, be wherein coal liquefaction residue passage 1, annular space between coal liquefaction residue pipe 7 and steam loop 8 is steam channel 2, annular space between steam loop 8 and interior epoxy tracheae 9 is interior ring oxygen channel 3, annular space between interior epoxy tracheae 9 and water-coal-slurry endless tube 10 is water-coal-slurry passage 4, annular space between water-coal-slurry endless tube 10 and outer shroud oxygen hose is outer shroud oxygen channel 5, between the end of one end of coal liquefaction residue and steam chamber 19 and coal liquefaction residue pipe 7, be provided with round table-like flaring passage, on the locular wall of mixing chamber flaring passage, be provided with four axial symmetrical steam nozzles 17, between the other end of this mixing chamber and coal liquefaction residue and steam nozzle 13, be provided with round table-like tapered channels, on the locular wall of mixing chamber, be also provided with four axial symmetrical steam nozzles 18, the end of described interior epoxy tracheae 9 is communicated with interior epoxy gas blowout mouth 14, the end of described water-coal-slurry endless tube 10 is communicated with water-coal-slurry spout 15, the end of described outer shroud oxygen hose 11 is communicated with outer shroud oxygen spout 16, as shown in Figure 2, the cross section of mixing chamber 19 main parts is circular, and the internal diameter W of mixing chamber 19 main parts is W: D=3 with the ratio of the inside diameter D of coal liquefaction residue pipe 7: 1, and the axial height H of mixing chamber 19 is H: W=2 with the ratio of its cross-sectional diameter W: 1, and the center line of steam nozzle 17 and 18 is respectively perpendicular to the locular wall of mixing chamber flaring passage and the locular wall of mixing chamber body part, the end of steam loop 8 is tapering type structure, the outside wall surface of the internal face of the tapering type end of steam loop 8 and mixing chamber tapered channels is accurately machined smooth surface, between the tapering type end of steam loop 8 and mixing chamber tapered channels for plug-in type gapless is installed or high-temperature resistant seal ring is set, thereby the end that makes described steam loop 8 forms an enclosed construction, make steam all via steam nozzle 17 and 18, enter in coal liquefaction residue and steam chamber 19 and mix with coal liquefaction residue, be also convenient to the installation and removal of steam loop 8 simultaneously, telescoping water-cooling endless tube 12 is coaxially arranged on to the outside of outer shroud oxygen hose 11, in telescoping water-cooling endless tube 12, is provided with cooling-water duct 6.
The coal liquefaction residue of the high-temperature fusion of discharging in direct coal liquefaction process device of take is produced synthesis gas (CO+H as gasifying agent as gasified raw material, the oxygen of take
2) or H processed
2unstripped gas is example, and thick coal liquefaction residue enters in the coal liquefaction residue passage 1 of gasification nozzle of the present invention after charge pump pressurization, and then flows in coal liquefaction residue and steam chamber 19; Simultaneously, steam enters steam channel 2, and via steam nozzle 17 and steam nozzle 18, enter in coal liquefaction residue and steam chamber 19 respectively, in mixing chamber, described steam fully mixes by being sprayed by coal liquefaction residue and steam nozzle 13 with coal liquefaction residue, therefore, steam also plays the effect of gasifying agent, greatly improved the atomization that coal liquefaction residue enters gasification furnace, in addition, steam provides the effect of heating and thermal insulation to the coal liquefaction residue in coal liquefaction residue pipe 7, make coal liquefaction residue in nozzle, remain good flow behavior; Meanwhile, oxygen enters respectively in interior ring oxygen channel 3 and outer shroud oxygen channel 5, and via interior epoxy gas blowout mouth 14 and 16 ejections of outer shroud oxygen spout; Water-coal-slurry enters in water-coal-slurry passage 4, and via 15 ejections of water-coal-slurry spout; Meanwhile, cooling water enters in telescoping water-cooling endless tube 12 via cooling-water duct 6, gasification nozzle is carried out cooling, protection nozzle in high-temperature gasification stove, do not burnt.
Below by embodiment, further illustrate gasification nozzle provided by the present invention, but the present invention is not therefore subject to any restriction.
Embodiment
A gasification nozzle is as shown in Figure 1 arranged in a texaco coal-water slurry gasification stove, and gasified raw material and gasifying agent spray in gasification furnace from top to bottom.The thick coal liquefaction residue of high temperature that DCL/Direct coal liquefaction device dregs of fat discharge place of China Shenhua Coal to Liquid and Chemical Co., Ltd. of usining obtains is as one of gasified raw material, and the Firing Shenhua Coal that originates from refreshing mansion Dongsheng coalfield is made to concentration is that the water-coal-slurry of 60wt% (being water-coal-slurry solid content) is as another gasified raw material, in described gasification furnace, take the mode of direct charging to carry out combined vaporizing to above-mentioned two kinds of gasified raw materials, to produce synthesis gas (CO+H
2).The mass ratio that enters the coal liquefaction residue of gasification nozzle in unit interval and enter contained dry coal in the Firing Shenhua Coal water-coal-slurry of gasification nozzle in the unit interval is 1: 1.The total feed of described coal liquefaction residue is 44400kg/h, the inlet amount of water-coal-slurry is 74000kg/h, oxygen volume flow in interior epoxy tracheae accounts for 14% of oxygen volume flow sum in interior epoxy tracheae and outer shroud oxygen hose, steam consumption is the 15wt% of coal liquefaction residue inlet amount, be that steam flow in steam loop is 6660kg/h, in gasification nozzle, the bore size of all steam nozzles is 3.5mm.
Coal liquefaction residue used in embodiment and the Industrial Analysis data of Firing Shenhua Coal have been shown in table 1, gasification condition and gasification performance while adopting the texaco coal-water slurry gasification stove that is provided with gasification nozzle of the present invention to carry out combined vaporizing to above-mentioned coal liquefaction residue and Firing Shenhua Coal water-coal-slurry have been shown in table 2.
The Industrial Analysis data of table 1 coal liquefaction residue and Firing Shenhua Coal
| Gasified raw material | Coal liquefaction residue | Firing Shenhua Coal |
| Moisture (Mad), wt% | 0 | 9 |
| Ash content (Aad), wt% | 19.74 | 6.37 |
| Volatile matter (Vad), wt% | 35.26 | 31.31 |
| Total sulfur (S t.ar), wt% | 3.31 | 0.38 |
| Carbon (Cad), wt% | 70.45 | 68.31 |
| Hydrogen (Had), wt% | 5.16 | 4.09 |
| Nitrogen (Nad), wt% | 0.81 | 0.94 |
| Oxygen (Oad), wt% | 0.54 | 10.98 |
| Ash melt temperature (FT), ℃ | 1230 | 1200 |
Gasification operation condition and gasification performance when table 2 adopts gasification nozzle of the present invention to coal liquefaction residue and water-coal-slurry combined vaporizing
Comparative example
Adopt originate identical coal liquefaction residue and Firing Shenhua Coal with embodiment, on the texaco coal-water slurry gasification stove that is provided with Texaco's three-way type coal-water-slurry gasification nozzle, respectively it is gasified, its feeding manner be respectively by cooling and pulverize after the residue water-coal-slurry charging (cold process charging) of making of coal liquefaction residue powder and the Firing Shenhua Coal water-coal-slurry charging (cold process charging) of making, in described residue water-coal-slurry, the weight ratio of water and residue is 0.56, and in described Firing Shenhua Coal water-coal-slurry, the weight ratio of water and Firing Shenhua Coal is 0.67.
In addition, adopt originate identical coal liquefaction residue and Firing Shenhua Coal with embodiment, identical with above-mentioned gasification furnace model but be provided with on the texaco coal-water slurry gasification stove of gasification nozzle as shown in Figure 1 and carry out combined vaporizing, for coal liquefaction residue, its feeding manner is that the coal liquefaction residue of high temperature thickness pressurizes, through this gasification nozzle, directly introduces (hot method charging) in gasification furnace again through charge pump; For Firing Shenhua Coal water-coal-slurry, still adopt cold process charging, and in described Firing Shenhua Coal water-coal-slurry, the weight ratio of water and Firing Shenhua Coal is 0.67, the ratio that enters the coal liquefaction residue of gasification nozzle of the present invention in unit interval and enter between the quality of contained dry coal in the Firing Shenhua Coal water-coal-slurry of gasification nozzle is 1: 1, and steam consumption is the 15wt% of coal liquefaction residue inlet amount.
In unit interval, enter the coal liquefaction residue of gasification nozzle of the present invention and the gross weight of contained dry coal in Firing Shenhua Coal water-coal-slurry identical with the weight that enters contained dry coal in the coal liquefaction residue water-coal-slurry of Texaco's three-way type gasification nozzle or Firing Shenhua Coal water-coal-slurry.
Adopt gasification nozzle of the present invention and adopt the gasification operation condition of Texaco's three-way type gasification nozzle in texaco coal-water slurry gasification stove and the contrast between gasification performance to be shown in Table 3.
Table 3 adopts gasification nozzle of the present invention and gasification operation condition and the gasification performance of Texaco's three-way type gasification nozzle in gasification furnace
From table 3, utilize gasification nozzle of the present invention can realize the hot charging of coal liquefaction residue of high temperature thickness, the coal liquefaction residue of melting directly pressurizes through charge pump without cooling, through gasification nozzle of the present invention, send in coal slurry gasifier together with coal-based water-coal-slurry again, improved the adaptability of gasification furnace to gasified raw material, cooling discharge and grinding technics have been saved, and gasification result had both been better than the cold process charging of coal liquefaction residue, be better than again the cold process charging of coal-based water-coal-slurry, while adopting gasification nozzle provided by the invention to carry out combined vaporizing to coal liquefaction residue and water-coal-slurry, CO+H in cold gas efficiency and product coal gas
2content all increase, oxygen expenditure in gasification (than oxygen consumption) and consumption of raw materials (than coal consumption) reduction.Therefore, gasification nozzle of the present invention is used for to domestic existing coal slurry gasifier at present, can realize combining of coal slurry gasifier and DCL/Direct coal liquefaction device, realize the hot method of coal liquefaction residue and recycle, reduce energy consumption, improve coal transformation efficiency, optimize coal conversion process, broken through in coal slurry gasifier and can only also change the single feeding manner of traditional coal-water-slurry gasification furnace in the conventional feeds mode of coal slurry charging, improved the adaptability of gasification furnace to gasified raw material.
Claims (14)
1. a coal liquefaction residue and water-coal-slurry combined vaporizing nozzle, it is characterized in that, described gasification nozzle comprises coal liquefaction residue pipe (7), steam loop (8), interior epoxy tracheae (9), water-coal-slurry endless tube (10), outer shroud oxygen hose (11), water-cooled endless tube (12) and coal liquefaction residue and steam chamber (19), and wherein said coal liquefaction residue pipe (7), steam loop (8), interior epoxy tracheae (9), water-coal-slurry endless tube (10), outer shroud oxygen hose (11) and water-cooled endless tube (12) are for coaxially arranging successively from inside to outside; One end of described coal liquefaction residue and steam chamber (19) is communicated with the end of coal liquefaction residue pipe (7), the other end of mixing chamber is communicated with coal liquefaction residue and steam nozzle (13), is provided with the steam nozzle (17,18) being connected with steam loop on the locular wall of mixing chamber; The end of steam loop (8) seals; The end of water-coal-slurry endless tube (10) is communicated with water-coal-slurry spout (15); The end of interior epoxy tracheae (9) is communicated with interior epoxy gas blowout mouth (14); The end of outer shroud oxygen hose (11) is communicated with outer shroud oxygen spout (16);
Between the end of described coal liquefaction residue pipe (7) and coal liquefaction residue and steam chamber (19), be provided with flaring passage, and be provided with tapered channels between described mixing chamber (19) and coal liquefaction residue and steam nozzle (13);
The diameter ratio of the maximum radial dimension of described coal liquefaction residue and steam chamber (19) and coal liquefaction residue pipe (7) is 1.5～8:1.
2. gasification nozzle according to claim 1, is characterized in that, is provided with the steam nozzle (17) being communicated with described steam loop (8) on the locular wall of described flaring passage.
3. gasification nozzle according to claim 2, is characterized in that, the maximum radial dimension of described coal liquefaction residue and steam chamber (19) and the diameter ratio of coal liquefaction residue pipe (7) are 2～5:1.
4. gasification nozzle according to claim 3, is characterized in that, the ratio of the axial height of described coal liquefaction residue and steam chamber (19) and the maximum radial dimension of described mixing chamber (19) is 0.5～5:1.
5. gasification nozzle according to claim 4, is characterized in that, the ratio of the axial height of described coal liquefaction residue and steam chamber (19) and the maximum radial dimension of described mixing chamber (19) is 1～2.5:1.
6. gasification nozzle according to claim 4, is characterized in that, described steam nozzle adopts single or multiple lift setting, and every layer of steam nozzle is axially distribution symmetrically and evenly, and is positioned at steam nozzle quantity >=3 of same layer.
7. gasification nozzle according to claim 6, it is characterized in that, the quantity that is positioned at the steam nozzle of same layer is 3, and the angle between the vertical line of the locular wall of the locular wall of the center line of described steam nozzle and described flaring passage or described coal liquefaction residue and steam chamber is 0-25 °.
8. gasification nozzle according to claim 6, it is characterized in that, be positioned at quantity >=4 of the steam nozzle of same layer, and the angle between the vertical line of the locular wall of the locular wall of the center line of described steam nozzle and described flaring passage or described coal liquefaction residue and steam chamber is 0-35 °.
9. according to the gasification nozzle described in claim 7 or 8, it is characterized in that, the bore size of described steam nozzle is 1～15mm.
10. gasification nozzle according to claim 9, is characterized in that, the bore size of described steam nozzle is 3～10mm.
The application of 11. gasification nozzles as described in any one in claim 1-10 in coal slurry gasifier.
12. application according to claim 11, it is characterized in that, the consumption of steam is no more than the 40wt% of coal liquefaction residue inlet amount, and the mass ratio that enters the coal liquefaction residue of described nozzle in the unit interval and enter dry coal contained in the water-coal-slurry of described nozzle in the unit interval is 1:3-3:1.
13. application according to claim 11, is characterized in that, the oxygen volume flow in described interior epoxy tracheae (9) accounts for the 10-50% of the oxygen volume flow sum in described interior epoxy tracheae (9) and outer shroud oxygen hose (11).
14. according to the application described in claim 12 or 13, it is characterized in that, the material mean flow rate that described coal liquefaction residue and steam nozzle (13) are located is 10～80m/s; The material mean flow rate that described interior epoxy gas blowout mouth (14) and outer shroud oxygen spout (16) are located is 60～250m/s; The material mean flow rate that described steam nozzle (17,18) is located is 10～150m/s; The material mean flow rate that described water-coal-slurry spout (15) is located is 10～120m/s.
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| CN201110182677.8A CN102268300B (en) | 2011-06-30 | 2011-06-30 | Coal liquefaction residue and coal water slurry combined gasification nozzle and application thereof |
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| CN201110182677.8A CN102268300B (en) | 2011-06-30 | 2011-06-30 | Coal liquefaction residue and coal water slurry combined gasification nozzle and application thereof |
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| CN102977926B (en) * | 2012-11-28 | 2014-04-16 | 华东理工大学 | Hot oxygen nozzle and application thereof in gasification furnace |
| CN104560213B (en) * | 2013-10-22 | 2017-11-24 | 任相坤 | A kind of water-coal-slurry and natural gas combined vaporizing nozzle |
| CN104560204B (en) * | 2013-10-22 | 2017-05-17 | 任相坤 | Water coal slurry and natural gas combined gasification furnace with multiple nozzles |
| CN104560205B (en) * | 2013-10-22 | 2017-05-03 | 任相坤 | Water-coal slurry and natural gas combined gasifier |
| CN106669989B (en) * | 2016-08-26 | 2019-11-08 | 镇江市长江机电设备厂有限公司 | A kind of centrifugal oil purifier cloth food tray |
| CN109575996B (en) * | 2018-12-27 | 2020-09-04 | 西北化工研究院有限公司 | Method for preparing synthesis gas by co-gasification of coal and heavy oil |
| CN109609194B (en) * | 2018-12-27 | 2020-12-15 | 西安元创化工科技股份有限公司 | Slurry and oxygen feeding control method of multi-channel nozzle |
| CN112708471B (en) * | 2019-10-25 | 2021-11-30 | 中国石油化工股份有限公司 | Efficient coal gasification reaction device and efficient coal gasification reaction method |
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| JPH0678537B2 (en) * | 1982-11-26 | 1994-10-05 | 株式会社日立製作所 | Three-fluid slurry-spray nozzle |
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| CN1592716A (en) * | 2001-11-02 | 2005-03-09 | 德士古发展公司 | Process for the gasification of heavy oil |
| CN102031152A (en) * | 2010-10-13 | 2011-04-27 | 神华集团有限责任公司 | Process nozzle and system for gasifying water coal slurry and application thereof |
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