CN106947560A - Lignite base couples the device and method of synthesising biological natural gas processed with biomass - Google Patents

Abstract

The invention discloses the device that a kind of lignite base couples synthesising biological natural gas processed with biomass, including lignite filler bin, powder of straw feed bin, powdered carbon feed bin and calcium oxide feed bin, belt conveyor is collected with one by respective electronic belt scale and is connected in the outlet of aforementioned four feed bin, collect belt conveyor again successively with mixer, rotary discharge bin, derivatived fuel comminutor and gasification furnace are sequentially connected in series, the outlet of gasification furnace is connected by air-introduced machine and preheater with secondary desulfuration tower, the outlet of secondary desulfuration tower is connected with methyl hydride catalyzed reactor, the outlet of methyl hydride catalyzed reactor is connected with carbon dioxide abjection tower；The invention also discloses a kind of method that lignite base couples synthesising biological natural gas processed with biomass；The present invention not only upgrading low cost, be easy to granulation, process relatively simple, and greatly reduce the risk of catalyst inactivation, gas integrated cost processed be greatly reduced, the efficient utilization of achievable brown coal powder.

Description

Lignite base couples the device and method of synthesising biological natural gas processed with biomass

Technical field

The present invention relates to a kind of device and method for natural gas from coal, system is particularly coupled with biomass for lignite The device and method of synthesising biological natural gas.

Background technology

China is country rich in coal and poor in oil, and energy resource structure is based on coal, and natural gas from coal also obtains more ripe in recent years Development；But lignite is the minimum coal of degree of coalification, accounts for 13% or so of coal in China reserves, due to lignite Wai Shui and interior water Content is up to 52-55%, have impact on the combustion heat value of lignite, and its minimum calorific value is only 2800 kilocalories or so, after lignite mining sorting Remaining substantial amounts of brown coal powder, it is difficult to be utilized effectively, the brown coal powder economy largely produced, feature of environmental protection extreme difference, such as can not be very Benefit reason not only produces significant wastage to resource, returns locality and brings very big pollution；In order to improve the calorific value of brown coal powder, both at home and abroad The processing technology routine of drying and upgrading is mostly used, upgrading high cost have impact on the efficient utilization of lignite；Such as carry out at granulation Reason, due to lignite low intensity, it is difficult to granulate, need to add bonding agent, this not only increases cost, process is also more complicated；Plus brown Coal sulfur-bearing is higher, and existing natural gas from coal technology can not effectively reduce the sulfur content in gas, and this will cause catalysis to produce methane The inactivation of middle catalyst, has a strong impact on the efficiency and cost of methanation.

The content of the invention

The purpose of the present invention is that above-mentioned not enough coupled there is provided a kind of lignite base with biomass for being directed to prior art makes synthesis The device and method of bio-natural gas, it not only upgrading low cost, be easy to granulation, process relatively simple, and greatly reduce and urge The risk of agent inactivation, is greatly reduced gas integrated cost processed, and the efficient utilization of brown coal powder can be achieved.

In order to achieve the above object, lignite base of the invention couples the device of synthesising biological natural gas processed with biomass, bag Include lignite filler bin, powder of straw feed bin, powdered carbon feed bin and calcium oxide feed bin, it is characterised in that：The outlet of aforementioned four feed bin is equal Collect belt conveyor with one by respective electronic belt scale to be connected, collect belt conveyor again successively with mixer, rotation Formula discharge bin, derivatived fuel comminutor and gasification furnace are sequentially connected in series, the outlet of gasification furnace by air-introduced machine and preheater with it is secondary Desulfurizing tower is connected, and the outlet of secondary desulfuration tower is connected with methyl hydride catalyzed reactor, the outlet of methyl hydride catalyzed reactor and titanium dioxide Carbon abjection tower is connected；

The import phase for passing through sub-material conveying worm and four feed bins as the further improvement of said apparatus, an elevator Even；Feeding efficiency can be improved；

As the further improvement of said apparatus, decanter type clarifier is provided between air-introduced machine and the outlet of gasification furnace, is being drawn Dry type cyclone purifier is additionally provided between blower fan and preheater；Granule foreign and decoking desulfurization can be deviate from respectively, beneficial to follow-up Methyl hydride catalyzed reaction；

As the further improvement of said apparatus, the outlet of methyl hydride catalyzed reactor is also steamed by the heat regenerator of series connection, ammoniacal liquor Vapour is deviate from tower and is connected with carbon dioxide abjection tower；The acidic materials in heat energy and abjection gas can effectively be reclaimed；

As the further improvement of said apparatus, elevator is provided between mixer and rotary discharge bin, in rotary discharging Between storehouse and derivatived fuel comminutor be provided with conveying worm, between derivatived fuel comminutor and the import of gasification furnace be provided with according to The elevator of secondary series connection, rotary discharge bin and conveying worm；The automation of feeding can be achieved；

The method that the present invention couples synthesising biological natural gas processed with biomass using the lignite base of said apparatus, it is characterised in that bag Include following steps：1）Mixing：It is 55-70% brown coal powder, 15-30% powder of straw, 10-15% powdered carbon, 3- by mass percent Uniform mixing after 5% calcium oxide is weighed；2）Granulation：Mixed material is sent into rotary discharge bin, entered after discharging Derivatived fuel comminutor is extruded, granulated, and obtained its moisture content of graininess derivatived fuel is less than 30%；3）Gasification：By graininess In derivatived fuel feeding gasification furnace, burning, gas under 600 DEG C -800 DEG C, the micro-oxygen conditions of oxygen content 0.2-1.2 equivalent proportions Change, obtain the gasification gas containing partial impurities；4）Secondary desulfuration：Gasification gas is sent to preheater heating in the presence of air-introduced machine To 300-400 DEG C, secondary desulfuration tower is entered back into, is contacted with the lime white in it, desulfurization；5）Catalytic reaction：Gasification after desulfurization Gas enters in methyl hydride catalyzed reactor, and more than 300 DEG C of gasification gas is in the presence of catalyst, carbon monoxide therein, hydrogen With partial CO 2 reaction generation methane, the fuel gas accounting such as methane is up to 96%；6）Except carbon：Reacted gas is entered back into In carbon dioxide abjection tower, coal bio-natural gas is obtained after deviating from remaining carbon dioxide；

The present invention carries out coupling mixing granulation by the way that a certain proportion of brown coal powder, powder of straw, powdered carbon, calcium oxide are uniformly mixed, Not only material itself moisture content lowers, and in extruding, granulation, material is warmed, part moisture evaporation, further dehydration, and its is aqueous Rate is less than 30%, and its calorific value completes dehydration, process is more simple up to 3000-3500 kilocalories while granulation；Stalk powder Spend for 1-20 millimeters, it contains lignin and cellulose, be warmed, soften in granulation, it is easy to granulate, it is to avoid granular powder Change, beneficial to follow-up gasification, add powdered carbon water content less than 5%, not only have very big profit to the comprehensive moisture of reduction brown coal powder after addition Benefit, more importantly desulfurization of the cooperation of powdered carbon and powder of straw to the gasification of lignite serves actively catalysis and suction-operated, Upgrading low cost；In order to further up to desulfurization sulfur fixation, with the addition of 3-5% calcium oxide, lignite pyrolytic gasification is reacted and produced Raw sulfur dioxide has solidification, can generate calcium sulfate or calcium sulfite, reaches gasification desulfuration in furnace purpose, greatly reduces gas Change content of sulfur dioxide in gas, be that favourable synthetic technological condition is created in rear process methanation, add follow-up secondary desulfuration process, It can ensure that sulfur content meets the requirements before catalytic reaction, reduce the risk of catalyst inactivation, improve the efficiency and drop of methanation Low cost, is greatly reduced gas integrated cost processed, and the efficient utilization of brown coal powder can be achieved；Except carbon process can deviate from it is incombustible residual Remaining carbon dioxide, improves the calorific value of coal bio-natural gas；

Coupled as lignite base of the present invention with biomass synthesising biological natural gas processed method one kind preferably, secondary desulfuration it Before, gasification gas is also separated by decanter type clarifier, depositing dust, deviates from granule foreign；Again by dry type cyclone purifier, with Charcoal and pulverized limestone contact in it, carry out decoking desulfurization；By adding charcoal, adsorbable gasification into dry type cyclone purifier Tar in gas, adds pulverized limestone, can increase once desulfurization；Gas degree of purity is improved above；

Coupled as lignite base of the present invention with biomass synthesising biological natural gas processed method one kind preferably, catalytic reaction with Except between carbon process, reacted gas also is passed through into ammonia vapor abjection tower, by adding ammonia vapor abjection gas in tower Acidic materials in body；It can prevent that acidic materials from corroding storage device, be easy to the storage of coal bio-natural gas；

In summary, the present invention not only upgrading low cost, be easy to granulation, process it is relatively simple, and greatly reduce catalyst mistake Risk living, is greatly reduced gas integrated cost processed, and the efficient utilization of brown coal powder can be achieved.

Brief description of the drawings

Fig. 1 is the structure diagram for the device embodiment that lignite base of the present invention couples synthesising biological natural gas processed with biomass.

Fig. 2 is the front view of rotary discharge bin in Fig. 1.

Fig. 3 is bull gear and stationary hopper junction structure chart in Fig. 2.

Fig. 4 is the front view of fuel comminutor derived from Fig. 1.

Fig. 5 is Fig. 4 top view.

Embodiment

Below in conjunction with the accompanying drawings, the present invention is further detailed explanation.

As shown in figure 1, the lignite base of the present embodiment couples the device of synthesising biological natural gas processed with biomass, including it is connected Elevator 1 and sub-material conveying worm 2, each outlet of sub-material conveying worm 2 respectively with lignite filler bin 3, straw powder material Storehouse 4, the import of powdered carbon feed bin 5 and calcium oxide feed bin 6 are connected, and the outlet of aforementioned four feed bin 3 to 6 passes through respective electronics skin Band claims 7 to collect belt conveyor 8 with one and be connected, collect belt conveyor 8 again successively with mixer 9, rotary discharge bin 10, spread out Raw fuel comminutor 11 and gasification furnace 12 are sequentially connected in series, wherein being provided with elevator between mixer 9 and rotary discharge bin 10 13, conveying worm 14 is provided between rotary discharge bin 10 and derivatived fuel comminutor 11, in derivatived fuel comminutor 11 Provided with elevator 15, rotary discharge bin 16 and the conveying worm 17 being sequentially connected in series between import with gasification furnace 12；Gasification The outlet of stove 12 passes through the decanter type clarifier 19 being sequentially connected in series, air-introduced machine 20, dry type cyclone purifier 21, preheater 22 and two Secondary desulfurizing tower 18 is connected, and conveying worm is provided with the cleanser import of dry type cyclone purifier 21, for net to dry type eddy flow Change and be provided with lime white in device 21 in addition charcoal and pulverized limestone, secondary desulfuration tower 18；Urged with methane the outlet of secondary desulfuration tower 18 Change reactor 23 to be connected, methyl hydride catalyzed reactor 23 is provided with catalyst conveying worm 27, methyl hydride catalyzed reactor 23 goes out Mouthful deviate from tower 26 by the heat regenerator 25 of series connection, ammonia vapor is connected with carbon dioxide abjection tower 24；

Wherein rotary discharge bin 10, as shown in Figures 2 and 3, including be sequentially connected from top to bottom fixation feed bin 31, support 32 With stationary hopper 33, hollow rotation distribution cabins 34 are provided between fixed feed bin 31 and stationary hopper 33, distribution cabins 34 are rotated Top be sleeved on outside the bottom of fixed feed bin 31, rotation distribution cabins 34 bottom be placed in stationary hopper 33, rotation cloth The welding of the outside of storehouse 34, which is fixedly connected with bull gear 35, the output shaft of a motor 37, is associated with the little gear 36 engaged with bull gear 35, electricity Machine 37 is fixedly connected on support 32；Annular groove 38 is provided with the lower surface of bull gear 35, the upper surface of stationary hopper 33 is located at this In annular groove, corresponding rolling groove is equipped with the upper surface of the end face of annular groove 38 and stationary hopper 33, several balls 39 are placed in phase In corresponding rolling groove, the bottom centre in stationary hopper 33 is provided with material distributing cone 40, in the bottom of stationary hopper 33 and material distributing cone 40 it is eccentric be provided with discharging opening 41, be provided with several piece material scraping plate 42 on the rotation inwall of distribution cabins 34；In use, material enters solid Determine feed bin 31, start motor 37, distribution cabins 34 are rotated and rotate by little gear 36, bull gear 35, material distributing cone 40 is by material Push outside to, tapping channel is formed between material distributing cone 40 and stationary hopper 33, when material scraping plate 42 promotes material by discharging opening 41 Discharge it；In use, material enters fixed feed bin 31, starts motor 37, cloth is rotated by little gear 36, bull gear 35 Feed bin 34 is rotated, and material distributing cone 40 pushes material to outside, and tapping channel, material scraping plate are formed between material distributing cone 40 and stationary hopper 33 42 promotion materials are discharged it when passing through discharging opening 41；The device can make the stalk of lightweight by using rotation distribution cabins 34 The smooth blanking of powder, powdered carbon, pulverized limestone, is not in block, meanwhile, it is capable to realize the effect of uniform blanking, it is ensured that the company of granulation Continuous property, realizes the prolonged normal work of system；

Derivatived fuel comminutor 11, as shown in Figure 4 and Figure 5, including support 51, shell 52, top cover 53, by bearing 61 located at outer Main shaft 54, motor 55 in shell 52, bevel pinion 56 on the output shaft of motor 55, the bevel gear wheel 57 being coupled on main shaft 54 are coupled to, Bevel gear wheel 57 is meshed with bevel pinion 56, and top cover 53 is provided with charging aperture 58, is externally provided with and is connected with shell 52 in main shaft 54 Supporting plate 59, an annular screen drum 60 is in supporting plate 59, and the supporting plate 59 in the annular outside of screen drum 60 is provided with several blankings Hole 62, is provided with discharge gate 63 and splicing plate 64, the main shaft 54 between supporting plate 59 and splicing plate 64 below supporting plate 59 Holding screw is by being associated with discharge blade 65；Pass through upper gusset piece 66 and second line of a couplet fishplate bar 67 on main shaft 54 in annular screen drum 60 Provided with two pressure rollers 68, the pinch roller 69 of three longitudinal arrangements is provided with every pressure roller 68 by bearing, in annular screen drum 60 Sieve aperture provided with several layers of longitudinal direction, every layer of sieve aperture includes several sieve apertures 70；Also it is fixedly connected with main shaft 54 and three helical layer blades 71, helical blade 71 is located at between each pinch roller 69 of layer；During work, motor 55 passes through bevel pinion 56, the band of bevel gear wheel 57 Dynamic main shaft 54 and pressure roller 68, pinch roller 69 and helical blade 71 rotate, and material enters in annular screen drum 60, and centrifugalization adds spiral shell Vane piece 71 pushes material to annular screen drum 60, and pinch roller 69 can do servo-actuated rotation simultaneously, to it between annular screen drum 69 Material carries out forward extrusion, and the material for meeting granularity requirements is pressed into sieve aperture 70, is pushed out afterwards again, material mistake herein High pressure is born in journey, while being heated up naturally, the pliability of powder of straw is improved in material, its internal combination water and Jiao The acitve organic matter of oil etc is extruded out, it is easy to granulate, and without using bonding agent, its bulk density and energy density are also obtained Improve, factor of created gase when can improve gasification is it is necessary to preferably granulation outcome；Material after broken falls into splicing plate by material-dropping hole 62 On 64, the discharge blade 65 rotated with main shaft 54 pushes away material through being discharged during discharge gate 63；

The method for being coupled synthesising biological natural gas processed with biomass using the lignite base of said apparatus, is comprised the following steps：1）It is mixed Close：It is 55-70% brown coal powder by mass percent, 15-30% powder of straw, 10-15% powdered carbon, 3-5% calcium oxide is through carrying Rise machine 1 and sub-material conveying worm 2 and be respectively fed to respective feed bin, and control proportioning after being weighed by respective electronic belt scale 7, Uniformly mixed in mixer 9；2）Granulation：Mixed material is sent into rotary discharge bin 10, through unloading by elevator 13 Entered after material by conveying worm 14 and be extruded, granulate, obtained graininess derivatived fuel in derivatived fuel comminutor 11, this When its moisture content be less than 30%；3）Gasification：By the boosted machine 15 of graininess derivatived fuel, rotary discharge bin 16 and helical feed In the feeding gasification furnace 12 of machine 17, burn, gasify under 600 DEG C -800 DEG C, the micro-oxygen conditions of oxygen content 0.2-1.2 equivalent proportions, Obtain the gasification gas containing partial impurities；4）Secondary desulfuration：It is net that gasification gas is first sent to decanter type in the presence of air-introduced machine 20 Change device 19, carry out depositing dust, separation, deviate from granule foreign, dry type cyclone purifier 21 is entered back into, with the charcoal and pulverized limestone in it Contact, carries out decoking desulfurization；The gasification preheated device 22 of gas is heated to 300-400 DEG C, secondary desulfuration tower 18 is entered back into, and in it Lime white contact, desulfurization；5）Catalytic reaction：Gasification gas after desulfurization enters in methyl hydride catalyzed reactor 23, passes through catalyst spiral shell Revolve conveyer 27 add catalyst, more than 300 DEG C of gasification gas in the presence of catalyst, carbon monoxide therein, hydrogen and Partial CO 2 reaction generation methane, the fuel gas accounting such as methane is up to 96%；6）Except carbon：Reacted gas is through overheating back Entered back into after receiving device 25, ammonia vapor abjection tower 26 in carbon dioxide abjection tower 24, coal is obtained after deviating from remaining carbon dioxide Bio-natural gas processed；

The present invention carries out coupling mixing granulation by the way that a certain proportion of brown coal powder, powder of straw, powdered carbon, calcium oxide are uniformly mixed, Not only material itself moisture content lowers, and in extruding, granulation, material is warmed, part moisture evaporation, further dehydration, and its is aqueous Rate is less than 30%, and its calorific value completes dehydration, process is more simple up to 3000-3500 kilocalories while granulation；Stalk powder Spend for 1-20 millimeters, it contains lignin and cellulose, be warmed, soften in granulation, it is easy to granulate, it is to avoid granular powder Change, beneficial to follow-up gasification, add powdered carbon water content less than 5%, not only have very big profit to the comprehensive moisture of reduction brown coal powder after addition Benefit, more importantly desulfurization of the cooperation of powdered carbon and powder of straw to the gasification of lignite serves actively catalysis and suction-operated, Upgrading low cost；In order to further up to desulfurization sulfur fixation, with the addition of 3-5% calcium oxide, lignite pyrolytic gasification is reacted and produced Raw sulfur dioxide has solidification, can generate calcium sulfate or calcium sulfite, reaches gasification desulfuration in furnace purpose, greatly reduces gas Change content of sulfur dioxide in gas, 45-55% is reduced than former lignite, be that favourable synthetic technological condition is created in rear process methanation, add Follow-up secondary desulfuration process, it is ensured that sulfur content meets the requirements before catalytic reaction, reduces the risk of catalyst inactivation, improves The efficiency of methanation and cost is reduced, be greatly reduced gas integrated cost processed, the efficient utilization of brown coal powder can be achieved；Gasification gas master To include carbon monoxide, hydrogen, carbon dioxide, sulfur dioxide, hydrogen sulfide and a small amount of methane, acetylene and inert gas, dioxy Change sulphur and hydrogen sulfide can by with pulverized limestone, many secondary responses of lime white and the absorption of charcoal, clearance is up to more than 95%；Except carbon Process can deviate from incombustible residual carbon dioxide, improve the calorific value of coal bio-natural gas；By being purified to dry type eddy flow Tar in charcoal, adsorbable gasification gas is added in device 21, pulverized limestone is added, once desulfurization can be increased, it is pure that the above improves gas Cleanliness；By deviating from the acidic materials added in tower 26 during ammonia vapor deviates from gas in ammonia vapor, acidic materials can be prevented Corrode storage device, be easy to the storage of coal bio-natural gas.

Claims (8)

1. a kind of lignite base couples the device of synthesising biological natural gas processed with biomass, including lignite filler bin, powder of straw feed bin, Powdered carbon feed bin and calcium oxide feed bin, it is characterised in that：The outlet of aforementioned four feed bin passes through respective electronic belt scale and one Collect belt conveyor be connected, collect belt conveyor again successively with mixer, rotary discharge bin, derivatived fuel comminutor and Gasification furnace is sequentially connected in series, the outlet of gasification furnace is connected by air-introduced machine and preheater with secondary desulfuration tower, and secondary desulfuration tower goes out Mouth is connected with methyl hydride catalyzed reactor, and the outlet of methyl hydride catalyzed reactor and carbon dioxide abjection tower are connected.

2. lignite base according to claim 1 couples the device of synthesising biological natural gas processed with biomass, it is characterised in that： One elevator is connected by sub-material conveying worm with the import of four feed bins.

3. the lignite base stated according to claim 1 or 2 couples the device of synthesising biological natural gas processed with biomass, its feature exists In：Decanter type clarifier is provided between air-introduced machine and the outlet of gasification furnace, dry type is additionally provided between air-introduced machine and preheater Cyclone purifier.

4. lignite base according to claim 3 couples the device of synthesising biological natural gas processed with biomass, it is characterised in that： Tower is also deviate from by the heat regenerator of series connection, ammonia vapor and is connected with carbon dioxide abjection tower in the outlet of methyl hydride catalyzed reactor.

5. lignite base according to claim 4 couples the device of synthesising biological natural gas processed with biomass, it is characterised in that： Elevator is provided between mixer and rotary discharge bin, spiral is provided between rotary discharge bin and derivatived fuel comminutor Conveyer, between derivatived fuel comminutor and the import of gasification furnace provided be sequentially connected in series elevator, rotary discharge bin and Conveying worm.

6. the method that synthesising biological natural gas processed is coupled with biomass using the lignite base of device as claimed in claim 1, it is special Levy is to comprise the following steps：1）Mixing：It is 55-70% brown coal powder, 15-30% powder of straw, 10-15% by mass percent Powdered carbon, 3-5% calcium oxide it is weighed after uniform mixing；2）Granulation：Mixed material is sent into rotary discharge bin, warp It is extruded, granulates into derivatived fuel comminutor after discharging, obtained its moisture content of graininess derivatived fuel is less than 30%；3）Gas Change：Graininess derivatived fuel is sent into gasification furnace, in 600 DEG C -800 DEG C, the micro-oxygen conditions of oxygen content 0.2-1.2 equivalent proportions Lower burning, gasification, obtain the gasification gas containing partial impurities；4）Secondary desulfuration：Gasification gas is sent in the presence of air-introduced machine Preheater is heated to 300-400 DEG C, enters back into secondary desulfuration tower, is contacted with the lime white in it, desulfurization；5）Catalytic reaction：It is de- Gasification gas after sulphur enters in methyl hydride catalyzed reactor, and more than 300 DEG C of gasification gas is in the presence of catalyst, an oxygen therein Change carbon, hydrogen and partial CO 2 reaction generation methane, the fuel gas accounting such as methane is up to 96%；6）Except carbon：Reacted gas Body is entered back into carbon dioxide abjection tower, and coal bio-natural gas is obtained after deviating from remaining carbon dioxide.

7. the method that lignite base according to claim 6 couples synthesising biological natural gas processed with biomass, it is characterised in that： Before secondary desulfuration, gasification gas is also separated by decanter type clarifier, depositing dust, deviates from granule foreign；Pass through purification again Device, is contacted with the charcoal and pulverized limestone in it, carries out decoking desulfurization.

8. the method that the lignite base according to claim 6 or 7 couples synthesising biological natural gas processed with biomass, its feature exists In：In catalytic reaction and except between carbon process, reacted gas is also passed through ammonia vapor abjection tower, passes through and is added in tower Acidic materials in ammonia vapor abjection gas.