CN203108514U - Axial and radial fixed bed methanation reactor - Google Patents
Axial and radial fixed bed methanation reactor Download PDFInfo
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- CN203108514U CN203108514U CN 201320021008 CN201320021008U CN203108514U CN 203108514 U CN203108514 U CN 203108514U CN 201320021008 CN201320021008 CN 201320021008 CN 201320021008 U CN201320021008 U CN 201320021008U CN 203108514 U CN203108514 U CN 203108514U
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Abstract
The utility model discloses an axial and radial fixed bed methanation reactor, comprising a pressure bearing shell (1) and internal components, wherein the pressure bearing shell (1) comprises a cover head, a bottom head and a middle shell; a reaction raw material inlet is formed in the cover head, and a reaction product outlet is formed in the bottom head; the internal components sequentially comprise a sealing cap (3) at the top, a center screen pipe (4) and an outer screen (5) in the middle, and a catalyst discharge pipe (6) at the bottom from top to bottom; the top of the center screen pipe (4) is closed; the outer screen (5) and the center screen pipe (4) as well as the outer screen (5) and the pressure bearing shell (1) respectively form an outer annular space and an inner annular space; the upper part of the outer annular space between the pressure bearing shell (1) and the outer screen (5) is opened; and inner annular space between the center screen pipe (4) and the outer screen (5) is divided into an upper catalyst bed layer a and a lower heat insulation filler area b. The shell and the internal components of the axial and radial fixed bed methanation reactor are respectively used for bearing pressure and temperature, so that the requirements for the material of the reactor are low.
Description
Technical field
The utility model relates to the methanation reaction device of preparation instead of natural gas (SNG), and relating in particular to the synthesis gas of coal after gasification, conversion, sour gas remove the unit is the methanation reaction equipment of feedstock production SNG.The utility model belongs to coal preparing natural gas field.
Background technology
Coal instead of natural gas processed (SNG) is becoming the new focus of coal chemical technology.Under the situation limited in the China's natural gas reserve, that production capacity can not satisfy the demands, the coal preparing natural gas is to the China's natural gas resources effective means of supplementing out economy.The core process of coal SNG processed is methanation technology, and methanator wherein nucleus equipment just.
Methanation reaction is the very exothermic reaction, and this makes reactor shell should bear elevated pressures and bears the rapid temperature rise that methanation reaction brings again.If adopt the design of hot wall axial flow reactor, the pressure-bearing shell material need be selected the high-alloy steel material for use, the construction costs height; If adopt cold wall adiabatic reactor design, reactor wall need arrange heat-resistant lining, has so not only increased the straight warp of reactor shell, and scale is amplified difficulty, and heat-resistant lining construction and difficult in maintenance; It is poor that axially-located bed reactor has the thermal effect of moving simultaneously, and many drawbacks such as big fall in bed layer pressure.A kind of reactor is disclosed such as patent CN102205220A, it has outer tunnel and internal channel, making reaction raw materials repeatedly by filling batch by a plurality of passages, but the pressure-bearing of above-mentioned reactor and hold very exothermic and the high pressure that heat energy power still is difficult to adapt to methanation reaction.At present, industrialized methanator adopts cold wall Adiabatic axle to fixed bed reactors, does not also solve above technical barrier well.
The utility model content
The utility model proposes a kind of diameter of axle to the fixed bed methanator, this reactor is replaced by the novel hot wall diameter of axle to the fixed bed methanator with the adiabatic axially-located bed methanator of cold wall in the present coal instead of natural gas methanation process processed, makes main pressure loading and main temperature loading be born by pressure-bearing shell and reactor inner member respectively; Reactor adopts the hot wall design; reaction raw materials from top axle to entering reactor; annular space outside stopping of cover plate enters between screen cloth and pressure-bearing shell; transfer to radially successively by outer screen cloth; beds a; center screen cloth pipe; and be pooled in the screen cloth pipe of center; final reacting product is axially discharged by reactor bottom; methanation reaction is the very exothermic reaction; its product temperature is higher; about 600 ~ 700 degree; therefore reactor of the present utility model only arranges thermal insulating filling district b(insulated lining is not set in housing in the bottom), with the guard reactor bottom shell.
The utility model is achieved through the following technical solutions:
A kind of diameter of axle is to the fixed bed methanator, and it comprises housing and inner member, it is characterized in that:
Described pressure-bearing shell 1 comprises cover head, bottom (head), middle casing, the feed(raw material)inlet that responds on the described cover head, the product that responds on bottom (head) outlet.
Described inner member comprises the sealing calotte 3 at top, the center screen cloth pipe 4 at middle part and the catalyst discharge duct 6 of outer screen cloth 5 and bottom from top to bottom successively.
Described center screen cloth pipe 4 is positioned at reactor center, its top seal, and the bottom is communicated with the reacting product outlet of described bottom (head).
Described outer screen cloth 5 is between pressure-bearing shell 1 and center screen cloth pipe 4, and itself and center screen cloth pipe 4 and pressure-bearing shell 1 constitute inside and outside two annular spaces respectively, wherein:
The top of outer ring space is that open, bottom seal between described pressure-bearing shell 1 and the outer screen cloth 5, is used for receiving the reaction raw materials that enters from cover head, and the annular brace circle is set in described outer screen cloth 5 bottoms and described pressure-bearing shell 1 is fixed.
Interior annular space between described center screen cloth pipe 4 and the outer screen cloth 5 is divided into upper and lower two zones, and top is beds a, and the bottom is the thermal insulating filling district b of stuffed heat insulated filler.Fill the thermal insulating filling of single material or multiple composite in the stuffed heat insulated filler in this thermal insulating filling district b, described thermal insulating filling district b, for example the heat insulation rope of single material or multiple composite, heat insulating belt, heat insulation felt rug, heat insulation ball or heat insulation powder.As mentioned above, described heat-barrier material district b filling heat-barrier material and loading catalyst not, form not flow region of medium, because this zone does not have catalyst, medium does not flow yet, can not produce reaction heat, make this zone become adiabatic zone, further avoid the methanation reaction heat release and rapid the intensification to the influence of pressure-bearing shell 1; Imbed the tube wall sealing of the center screen cloth pipe 4 of described thermal insulating filling district b.
Described sealing calotte 3 is buckled in the top of center screen cloth pipe 4 and interior annular space, described sealing calotte 3 is connected with described outer screen cloth 5 fixing compacts, described sealing calotte 3 and described center screen cloth pipe 4 outer walls are not fixed and are adopted dynamic seal (packing), and the gap between described sealing calotte 3 and described center screen cloth pipe 4 outer walls and described outer screen cloth 5 inwalls all must not be greater than catalyst particle size.
Described sealing calotte 3 is the fabricated structures by the ring cover case structure of end face and sidewall or annular top box and center top box.
When sealing calotte 3 was fabricated structure, its center top box cover was buckled in screen cloth pipe 4 tops, described center, and closely was connected with the annular top box at the top that is buckled in interior annular space.
The sealing of described top box end face, bottom surface are opened wide, and the sidewall of annular top box forms dynamic seal (packing)s with center screen cloth pipe 4, namely as described beds a during because of variations in temperature volume harmomegathus, seal calotte 3 meetings along with moving up and down.The effect of sealing calotte 3 is that a part of catalyst or catalyst substitute are enclosed in the interior annular space that sealing calotte 3, center screen cloth pipe 4, outer screen cloth 5 and thermal insulating filling district b surround.Its annular top box should have certain altitude, its inner loading catalyst or catalyst substitute, such as the porcelain ball, the material level of annular top box catalyst or catalyst substitute can cause reducing because of underlying cause: 1. the annular space inner catalyst causes annular top box inner catalyst material level to reduce because of natural subsidence or compressive setting in.2. center screen cloth pipe 4 and outer screen cloth 5 cause annular top box inner catalyst material level to reduce because expanded by heating drive sealing calotte 3 moves up.The height of annular top box should make catalyst or its substitute material level maintain the certain altitude of annular top box inside, its effect is to force reaction raw materials radially to walk beds a district to react, and be unlikely to cause forming between beds a district and annular top box the gap because the catalyst material level reduces, reaction raw materials is walked short circuit.Because methanation reaction strong exothermal reaction characteristic makes the temperature of outer screen cloth 5 low than the temperature of center screen cloth pipe 4, outer screen cloth is different with the expanded by heating amount of center screen cloth pipe 4, and the dynamic seal (packing) of the sidewall of annular top box and center screen cloth pipe 4 and center top box make the 4 energy free wxpansions of center screen cloth pipe and do not leak catalyst or make reaction raw materials walk short circuit.
Described internal accelerator discharge duct 6 inserts described external catalyst discharge duct.
Described center screen cloth pipe 4 is double-layer structure, skin is the wedge shape wrapping wire screen cloth that is welded by grating and support bar, adopt special processing method welding to make, its intensity height, good rigidly, can adjust the grating gap at the catalyst of different-grain diameter, gap between the grating of described outer field wedge shape wrapping wire screen cloth is less than the catalyst particle size of filling between this center screen cloth pipe 4 and the outer screen cloth 5, realizing that two of catalyst and reaction raw materials are separated with the catalyst retaining outside screen cloth; Internal layer is the punching steel plate, and the punching steel plate thickness of described internal layer is 4 ~ 50mm; The thickness of described punching steel plate and percent opening and opening diameter calculate according to the material of thickness of bed layer, bed allowable pressure drop, reaction raw materials flow velocity and punching steel plate to be determined, can realize that by control steel-sheet percent opening the technological reaction raw material radially passes through equably with lower pressure drop.
The annular base that is communicated with described product outlet of center drilling is set on described pressure-bearing shell 1 bottom (head), insert in the annular base on described pressure-bearing shell 1 bottom (head) these screen cloth pipe 4 bottoms, center, seal between the tube wall of this center screen cloth pipe 4 and this annular base, generally position and seal by pin and pottery towline.
Described annular base inwall and the equal small pieces of cloth used for patches heat-barrier material of described reacting product outlet inwall.
Described outer screen cloth 5 is selected from one of following two class formations:
Described outer screen cloth 5 is outer mesh structures of cylinder of the whole individual layer of wedge shape wrapping wire screen cloth that is welded by grating and support bar, and its bottom is sealed with pressure-bearing shell 1 by support member and is connected.
The tubular screen cloth modular construction that described outer screen cloth 5 is different shapes comprises fan tubular, cylindrical shape and polygon tubular, each tubular screen cloth unit open-top, bottom lock.Above-mentioned tubular screen cloth unit adopts the single integral ring-shaped outer screen cloth 5 that is combined to form, and namely integral ring-shaped outer screen cloth 5 is combined or formed by the cylindrical shape unit combination by the fan cartridge unit, or is combined by the polygon cartridge unit.
The outer mesh structure advantage of the cylinder of whole individual layer is whole catalyst fixed bed thickness of bed layer unanimity, and reaction raw materials is evenly distributed in bed; Need put into before pressure-bearing shell 1 does not seal, externally sieve breakage carries out sectional repair usually.Therefore, usually the integral ring-shaped outer mesh structure that adopts tubular screen cloth unit combination to form when outer screen cloth diameter is big, its advantage is can respectively reactor be put into by the reactor head manhole in single tubular screen cloth unit to be assembled into integral body again, in case single screen cloth unit occurs damaged, can change the outer screen cloth unit of single tubular, maintenance and repair are convenient; Be applicable to that there is situation about changing in catalyst fixed bed thickness of bed layer.
Described external catalyst discharge duct inserts the described internal accelerator discharge duct 6 of connection by the bottom (head) of described pressure-bearing shell 1, and internal accelerator discharge duct 6 passes described thermal insulating filling district b and contacts with described beds a.
Described external catalyst discharge duct inserts the described internal accelerator discharge duct 6 of connection by the middle casing sidewall of described pressure-bearing shell 1, and internal accelerator discharge duct 6 contacts with described beds a.Above-mentioned internal accelerator discharge duct 6 is dismountable bend pipe or straight tube structure.
Be disposed radially spacing support member in the beds a, be used for supporting outer screen cloth 5 and constitute interior annular space with center screen cloth pipe 4, one end of described support member and described outer screen cloth 5 or described center screen cloth pipe 4 are fixing, the spacing support of the other end is with the distance between fixed center screen cloth pipe 4 and the outer screen cloth 5.
Described pressure-bearing shell 1 is the pressure vessel that steel plate or steel forgings are made.
Because methanation reaction very exothermic, reactor inner member expanded by heating, above-mentioned center screen cloth pipe 4 and outer screen cloth 5 bottoms are fixed and top area is buckled with the structure that seals calotte 3, make the free wxpansion that all can make progress separately of center screen cloth pipe 4, outer screen cloth 5 and sealing calotte 3, satisfy the requirement of different swell incremenies separately, further adaptive response.
The height of described annular top box is determined according to the settling amount of catalyst and the swell increment of reactor internals, should make the material level of annular top box inner catalyst or catalyst substitute still can satisfy the needed height of reaction, and the unlikely raw material that reacts is walked short-circuit conditions; Described annular top box is tightly connected by the annular top box of a plurality of fans and forms, and each is fanned to adopt between the annular top box and removably connects.
As mentioned above, described sealing calotte 3 is buckled in described beds a top and is close to described outer screen cloth 5 inwalls and described center screen cloth pipe 4 outer walls, make the charging reaction raw materials that axially enters reactor can only enter the annular space of 5 of pressure-bearing shell 1 and outer screen clothes, transfer to more radially by outer screen cloth 5, beds a and center screen cloth pipe 4, and reacted product is pooled in the center screen cloth pipe 4, and finally axially discharges pressure-bearing shell 1 through center screen cloth pipe 4 and pressure-bearing shell 1 outlet; The height of described annular top box is determined by the settling amount of catalyst and the swell increment of reactor internals, structure with combination seal calotte 3, further avoid situation because of catalyst natural subsidence or compressive setting and reactor internals expanded by heating inequality cause catalyst or its substitute material level annular top box internal height cross low or beds a district and annular top box between form the gap, the situation that reaction raw materials is walked short circuit takes place, such as reaction raw materials not by or substantially not by beds directly by between the slit enter center screen cloth pipe 4, the influence reaction, described annular top box is tightly connected by a plurality of fan-shaped top boxs and forms.But the fan of described sealing calotte 3 annular top boxs annular top box, center cover split assembling, the dismounting maintenance is all very convenient.Described center screen cloth pipe 4, outer screen cloth 5 and internal accelerator discharge duct 6 are demountable structure.Described pressure-bearing shell 1 is the pressure vessel that steel plate or steel forgings are made.
The utility model is a kind of methanator, because methanation reaction is the very exothermic reaction, feeding process reaction raw materials pressure is higher, temperature is lower, through becoming high-temperature reaction product after the reaction, setting by above inner member and heat-barrier material, but realization response device pressure-bearing shell only contacts the lower charging reaction raw materials of temperature, bear higher feed pressure simultaneously, reactor can adopt hot wall design, has therefore avoided the difficulty in manufacturing, construction and the maintenance that the cold wall reactor heat-resistant lining brings.Compare with the hot wall axial restraint bed bioreactor in past, pressure-bearing shell can not selected high alloy material, has reduced the device fabrication cost.Inner member is installed in inside reactor, it is when bearing higher product operating temperature, only bear beds a two ends than low bed layer pressure reduction and bed static pressure, and needn't bear high pressure as pressure-bearing shell, therefore, the reactor inner member can be selected high alloy material, be optimized from the structural design angle simultaneously, improve the rigidity of inner member, so just realized the design concept that higher pressure loading and higher temperature loading are born respectively by pressure-bearing shell and reactor inner member respectively; Adopt simultaneously that radially beds a is thinner than axial catalyst bed a, particularly, reaction raw materials flows through beds a direction along radial direction in the radial bed, the vertical shell axis; Axially in the bed reaction raw materials to flow through beds a direction parallel with the shell central axis, the radial bed of same volume and axially bed comparing, the radial bed thickness of bed layer is thinner, contact area is bigger, corresponding bed pressure drop is littler, reaction heat shifts out easily.The axle radial bed that the utility model provides, be that the diameter of axle is to fixed bed, refer to that reaction raw materials is along housing axis direction inflow reactor inside, after flowing through beds a, radius and axis direction converge in the central tube again, flow out through the central tube axis direction then, reaction raw materials both flowed vertically, radially flowed again, compare with existing methanator, can more realize better effect in the small size.
The utility model reactor inner member all is designed to whole removable structures with convenient for maintaining; If the methanation reaction unit scale needs to enlarge, only need the novel hot wall diameter of axle of suitable increase to get final product to the axial height of fixed bed reactors, reactor diameter no longer is the absolute restraining factors to scale, and when scale is amplified, methanator for equal scale, adopt the diameter of axle of novel hot wall little to the present relatively axially-located bed reactor diameter of cold wall of fixed bed methanator, not only controlled cost but also be convenient to transportation.
Comprehensive all above-mentioned advantages, make the diameter of axle of the present utility model to the fixed bed methanator with respect to traditional methanator, scale amplifying power strong and device fabrication, construction and maintenance cost reduce.The utility model is particularly useful for the methanator that synthesis gas from coal gasification is produced instead of natural gas (SNG).
Description of drawings
Fig. 1 is that the diameter of axle of the present utility model is to the structural representation of the embodiment 1 of fixed bed methanator.
Fig. 2 is that the diameter of axle of the present utility model is to the structural representation of the embodiment 2 of fixed bed methanator.
Fig. 3 is the diameter of axle of the present utility model screen cloth schematic cross-section outside the cylinder of the whole individual layer of fixed bed methanator.
Fig. 4 is that the diameter of axle of the present utility model is to the outer screen cloth schematic cross-section of the fan cartridge unit combination of fixed bed methanator.
Fig. 5 is that the diameter of axle of the present utility model is to the outer screen cloth schematic cross-section of the cylindrical shape unit combination of fixed bed methanator.
Fig. 6 is that the diameter of axle of the present utility model is to the outer screen cloth schematic cross-section of the polygon cartridge unit combination of fixed bed methanator.
Description of reference numerals:
1-pressure-bearing shell, 3-cover plate, 4-center screen cloth pipe, the outer screen cloth of 5-, 6-internal accelerator discharge duct, a-beds, b-thermal insulating filling district
The specific embodiment
Below in conjunction with embodiment, provide a kind of diameter of axle to further specify to the fixed bed methanator to the utility model.
Embodiment 1
A kind of diameter of axle as shown in Figure 1 is to the fixed bed methanator, and described reactor adopts the hot wall design, and it comprises housing and inner member, it is characterized in that:
A kind of diameter of axle is to the fixed bed methanator, and it comprises housing and inner member, it is characterized in that:
Described pressure-bearing shell 1 comprises cover head, bottom (head), middle casing, the feed(raw material)inlet that responds on the described cover head, the product that responds on bottom (head) outlet.
Described inner member comprises the sealing calotte 3 at top, the center screen cloth pipe 4 at middle part and the catalyst discharge duct 6 of outer screen cloth 5 and bottom from top to bottom successively.
Described center screen cloth pipe 4 is positioned at reactor center, its top seal, and the bottom is communicated with the reacting product outlet of described bottom (head).
Described outer screen cloth 5 is between pressure-bearing shell 1 and center screen cloth pipe 4, and itself and center screen cloth pipe 4 and pressure-bearing shell 1 constitute outer, interior two annular spaces respectively, wherein:
The top of outer ring space is open between described pressure-bearing shell 1 and the outer screen cloth 5, is used for receiving the reaction raw materials that enters from cover head, and described outer screen cloth 5 bottoms arrange support member, and described outer screen cloth 5 bottoms and described pressure-bearing shell 1 are fixing.
Interior annular space between described center screen cloth pipe 4 and the outer screen cloth 5 is divided into upper and lower two zones, and top is beds a, and the bottom is the thermal insulating filling district b of stuffed heat insulated filler.
Annular space between described center screen cloth pipe 4 and the outer screen cloth 5 is divided into upper and lower two zones, top is beds a, the bottom is thermal insulating filling district b, stuffed heat insulated filler in this thermal insulating filling district b, fill the thermal insulating filling of single material or multiple composite in the described thermal insulating filling district b, for example the heat insulation rope of single material or multiple composite, heat insulating belt, heat insulation felt rug, heat insulation ball or heat insulation powder.As mentioned above, described heat-barrier material district b filling heat-barrier material and loading catalyst not, form not flow region of medium, because this zone does not have catalyst, medium does not flow yet, can not produce reaction heat, make this zone become adiabatic zone, further avoid the methanation reaction heat release and rapid the intensification to the influence of pressure-bearing shell 1; Imbed the tube wall sealing of the center screen cloth pipe 4 of described thermal insulating filling district b.
Described sealing calotte 3 is buckled in the top of center screen cloth pipe 4 and interior annular space, described sealing calotte 3 is connected with described outer screen cloth 5 fixing compacts, described sealing calotte 3 and described center screen cloth pipe 4 outer walls are not fixed and are adopted dynamic seal (packing), and the gap between described sealing calotte 3 and described center screen cloth pipe 4 outer walls and described outer screen cloth 5 inwalls all must not be greater than catalyst particle size.
Described sealing calotte 3 is the fabricated structures by the ring cover case structure of end face and sidewall or annular top box and center top box.
When sealing calotte 3 was combined type, its center top box cover was buckled in screen cloth pipe 4 tops, described center, and closely was connected with the annular top box at the top that is buckled in interior annular space.
The sealing of described top box end face, bottom surface are opened wide, and the sidewall of annular top box forms dynamic seal (packing)s with center screen cloth pipe 4, namely as described beds a during because of variations in temperature volume harmomegathus, seal calotte 3 meetings along with moving up and down.The annular top box of sealing calotte 3 should have certain altitude, its inner loading catalyst or catalyst substitute, such as the porcelain ball, the material level of annular top box catalyst or catalyst substitute can cause reducing because of underlying cause: 1. the annular space inner catalyst causes annular top box inner catalyst material level to reduce because of natural subsidence or compressive setting in.2. center screen cloth pipe 4 and outer screen cloth 5 cause annular top box inner catalyst material level to reduce because expanded by heating drive sealing calotte 3 moves up.The height of annular top box should make catalyst or its substitute material level maintain the certain altitude of annular top box inside, its effect is to force reaction raw materials radially to walk beds a district to react, and be unlikely to cause forming between beds a district and annular top box the gap because the catalyst material level reduces, reaction raw materials is walked short circuit.Because methanation reaction strong exothermal reaction characteristic makes the temperature of outer screen cloth 5 low than the temperature of center screen cloth pipe 4, outer screen cloth is different with the expanded by heating amount of center screen cloth pipe 4, and the dynamic seal (packing) of the sidewall of annular top box and center screen cloth pipe 4 and center top box make the 4 energy free wxpansions of center screen cloth pipe and do not leak catalyst or make reaction raw materials walk short circuit.
Described center screen cloth pipe 4 is double-layer structure, skin is the wedge shape wrapping wire screen cloth that is welded by grating and support bar, adopt special processing method welding to make, its intensity height, good rigidly, can adjust the grating gap at the catalyst of different-grain diameter, gap between the grating of described outer field wedge shape wrapping wire screen cloth is less than the catalyst particle size of filling between this center screen cloth pipe 4 and the outer screen cloth 5, realizing that two of catalyst and reaction raw materials are separated with the catalyst retaining outside screen cloth; Internal layer is the punching steel plate, and the punching steel plate thickness of described internal layer is 4 ~ 50mm; The thickness of described punching steel plate and percent opening and opening diameter calculate according to the material of thickness of bed layer, bed allowable pressure drop, reaction raw materials flow velocity and punching steel plate to be determined, can realize that by control steel-sheet percent opening the technological reaction raw material radially passes through equably with lower pressure drop.
The annular base that is communicated with described product outlet of center drilling is set on described pressure-bearing shell 1 bottom (head), insert in the annular base on described pressure-bearing shell 1 bottom (head) these screen cloth pipe 4 bottoms, center, seal between the tube wall of this center screen cloth pipe 4 and this annular base, generally position and seal by pin and pottery towline;
Described annular base inwall and the equal small pieces of cloth used for patches heat-barrier material of described reacting product outlet inwall.
Described outer screen cloth 5 is selected from one of following two class formations:
Described outer screen cloth 5 is outer mesh structures of cylinder of the whole individual layer of wedge shape wrapping wire screen cloth that is welded by grating and support bar, and its bottom is sealed with pressure-bearing shell 1 by support member and is connected.
The tubular screen cloth modular construction that described outer screen cloth 5 is different shapes comprises fan tubular, cylindrical shape and polygon tubular, each tubular screen cloth unit open-top, bottom lock.Above-mentioned tubular screen cloth unit adopts the single integral ring-shaped outer screen cloth 5 that is combined to form, and namely integral ring-shaped outer screen cloth 5 is combined or formed by the cylindrical shape unit combination by the fan cartridge unit, or is combined by the polygon cartridge unit.
Described internal accelerator discharge duct 6 inserts described external catalyst discharge duct.
Described external catalyst discharge duct inserts the described internal accelerator discharge duct 6 of connection by the bottom (head) of described pressure-bearing shell 1, and internal accelerator discharge duct 6 passes described thermal insulating filling district b and contacts with described beds a.
Described support member is strengthened the annular brace circle of gusset for band, and described outer screen cloth 5 bottoms fix by securing member and described annular brace circle or spacing the fixing of spacing clamp by welding mutually with this annular brace circle.
Be disposed radially spacing support member in the described beds a, it is fixedlyed connected with described outer screen cloth 5 or fixedlys connected with described center screen cloth pipe 4, an end that is described spacing support member is fixed, and the spacing support of the other end is with the distance between fixed center screen cloth pipe 4 and the outer screen cloth 5.
Described pressure-bearing shell 1 is the pressure vessel that steel plate or steel forgings are made.
Embodiment 2
A kind of diameter of axle as shown in Figure 2 is to the fixed bed methanator, the structure of this reactor except the position of its external catalyst discharge duct and internal accelerator discharge duct 6 with structure is different with the reactor of embodiment 1, other structures are identical with reactor among the embodiment 1.Particularly, the external catalyst discharge duct of embodiment 2 inserts the described internal accelerator discharge duct 6 of connection by the middle casing sidewall of described pressure-bearing shell 1, and internal accelerator discharge duct 6 contacts with described beds a, and it is dismountable straight tube structure.
Reaction raw materials flows to the path among above-described embodiment 1 and the embodiment 2: reaction raw materials axially enters earlier reactor, enter the annular space (charging reaction raw materials passage) of 1 of outer screen cloth 5 and pressure-bearing shell then, transfer to radially and reacting by ring catalyst bed a between center screen cloth pipe 4 and the outer screen cloth 5, reacted product is pooled in the center screen cloth pipe 4, and finally axially discharges pressure-bearing shell 1 through center screen cloth pipe 4 and pressure-bearing shell 1 outlet.
The reactor main design parameters is determined among above-described embodiment 1 and the embodiment 2: outside pressure-bearing shell 1 can be according to the actual temperature of the reaction raw materials charging operating temperature as reactor, the actual pressure of reaction raw materials charging is as the operating pressure of reactor, combined process reaction raw materials characteristic and equipment corrosion situation are determined DESIGN OF REACTOR temperature, design pressure simultaneously, and then the material of the outside pressure-bearing shell 1 of definite reactor.Because the reacted elevated temperature heat product of charging reaction raw materials (about 600 ~ 700 degree) does not contact fully with the outside pressure-bearing shell 1 of reactor, so the selection of the outside pressure-bearing shell 1 of reactor is considered the high-temperature factor of thermal response product or do not consider as secondary cause.The reactor inner member, be that cover plate 3, center screen cloth pipe 4, outer screen cloth 5 and internal accelerator discharge duct 6 are assemblied in inside reactor, fully contact with product, high temperature, bed pressure drop and the catalyst of product and the factors such as static pressure of reaction raw materials are mainly considered in the design of above-mentioned inner member, can be used as secondary cause for higher actual feed pressure and consider or do not consider.
Principle of the present utility model is the characteristics that reduce according to the strong heat release of methanation reaction, volume, utilize the reactor inner member will pass by the axial restraint bed bioreactor and change the hot wall diameter of axle into to fixed bed reactors, allow pressure-bearing shell and reactor inner member bear pressure loading and temperature loading respectively, and then reduction is to the requirement of reactor material, can also reach that the reactor scale is amplified, diameter reduces by lengthening height for reactor, reduce cost the purpose of being convenient to transport.
Claims (9)
1. a diameter of axle comprises pressure-bearing shell (1) and inner member to the fixed bed methanator, it is characterized in that:
Described pressure-bearing shell (1) comprises cover head, bottom (head), middle casing, the feed(raw material)inlet that responds on the described cover head, the product that responds on bottom (head) outlet;
Described inner member comprises the sealing calotte (3) at top, the center screen cloth pipe (4) at middle part and the catalyst discharge duct (6) of outer screen cloth (5) and bottom from top to bottom successively;
Described center screen cloth pipe (4) is positioned at reactor center, its top seal, and the bottom is communicated with the reacting product outlet of described bottom (head);
Described outer screen cloth (5) is positioned between pressure-bearing shell (1) and the center screen cloth pipe (4), and itself and center screen cloth pipe (4) and pressure-bearing shell (1) constitute inside and outside two annular spaces respectively, wherein:
The top of outer ring space is that open, bottom is sealed between described pressure-bearing shell (1) and the outer screen cloth (5), be used for receiving the reaction raw materials that enters from cover head, the annular brace circle is set in described outer screen cloth (5) bottom and described pressure-bearing shell (1) is fixing;
Interior annular space between described center screen cloth pipe (4) and the outer screen cloth (5) is divided into upper and lower two zones, and top is beds a, and the bottom is the thermal insulating filling district b of stuffed heat insulated filler.
2. methanator according to claim 1 is characterized in that:
Described sealing calotte (3) is buckled in the top of center screen cloth pipe (4) and interior annular space, described sealing calotte (3) is connected with described outer screen cloth (5) fixing compact, described sealing calotte (3) and described center screen cloth pipe (4) outer wall are not fixed and are adopted dynamic seal (packing), and the gap between described sealing calotte (3) and described center screen cloth pipe (4) outer wall and described outer screen cloth (5) inwall all is not more than catalyst particle size.
3. a kind of methanator according to claim 2 is characterized in that:
Described sealing calotte (3) is the fabricated structure by the ring cover case structure of end face and sidewall or annular top box and center top box;
When sealing calotte (3) was fabricated structure, its center top box cover was buckled in described center screen cloth pipe (4) top, and closely was connected with the annular top box at the top that is buckled in interior annular space;
Described top box end face sealing, bottom surface are opened wide, and the sidewall of annular top box and center screen cloth pipe (4) form dynamic seal (packing).
4. a kind of methanator according to claim 3 is characterized in that:
Described center screen cloth pipe (4) is double-layer structure, skin is the wedge shape wrapping wire screen cloth that is welded by grating and support bar, internal layer is the punching steel plate, gap between the grating of described outer field wedge shape wrapping wire screen cloth is less than the catalyst particle size of filling between this center screen cloth pipe (4) and the outer screen cloth (5), and the punching steel plate thickness of described internal layer is 4 ~ 50mm.
5. a kind of methanator according to claim 4 is characterized in that:
The annular base that is communicated with described product outlet of center drilling is set on described pressure-bearing shell (1) bottom (head), and insert in the described annular base this center screen cloth pipe (4) bottom, seals between the tube wall of this center screen cloth pipe (4) and this annular base;
Described annular base inwall and the equal small pieces of cloth used for patches heat-barrier material of described reacting product outlet inwall.
6. according to the described a kind of methanator of one of claim 1 ~ 5, it is characterized in that:
Described outer screen cloth (5) is selected from one of following two class formations:
Described outer screen cloth (5) is the outer mesh structure of cylinder of the whole individual layer of wedge shape wrapping wire screen cloth that is welded by grating and support bar, and its bottom is sealed with pressure-bearing shell (1) by support member and is connected;
Described outer screen cloth (5) is the tubular screen cloth modular construction of different shape, comprises fan tubular, cylindrical shape and polygon tubular, each tubular screen cloth unit open-top, bottom lock.
7. a kind of methanator according to claim 6 is characterized in that:
Described external catalyst discharge duct inserts connection described internal accelerator discharge duct (6) by the bottom (head) of described pressure-bearing shell (1), and internal accelerator discharge duct (6) passes described thermal insulating filling district b and contacts with described beds a.
8. a kind of methanator according to claim 6 is characterized in that:
Described external catalyst discharge duct inserts connection described internal accelerator discharge duct (6) by the middle casing sidewall of described pressure-bearing shell (1), and internal accelerator discharge duct (6) contacts with described beds a.
9. a kind of methanator according to claim 6 is characterized in that:
Be disposed radially spacing support member in the beds a, be used for supporting outer screen cloth (5) and constitute interior annular space with center screen cloth pipe (4), one end of described support member and described outer screen cloth (5) or described center screen cloth pipe (4) are fixing, the spacing support of the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021008 CN203108514U (en) | 2013-01-15 | 2013-01-15 | Axial and radial fixed bed methanation reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021008 CN203108514U (en) | 2013-01-15 | 2013-01-15 | Axial and radial fixed bed methanation reactor |
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| Publication Number | Publication Date |
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| CN203108514U true CN203108514U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320021008 Expired - Lifetime CN203108514U (en) | 2013-01-15 | 2013-01-15 | Axial and radial fixed bed methanation reactor |
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| Country | Link |
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| CN (1) | CN203108514U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920429A (en) * | 2013-01-15 | 2014-07-16 | 中国石化工程建设有限公司 | Axial-radial fixed bed methanation reactor |
| CN107519822A (en) * | 2016-06-21 | 2017-12-29 | 中国石化工程建设有限公司 | A kind of multi-bed layer shaft radial reactor |
| CN108854862A (en) * | 2017-05-11 | 2018-11-23 | 中国石化工程建设有限公司 | A kind of particulate matter bed supportive grid and radial flow reactors |
-
2013
- 2013-01-15 CN CN 201320021008 patent/CN203108514U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920429A (en) * | 2013-01-15 | 2014-07-16 | 中国石化工程建设有限公司 | Axial-radial fixed bed methanation reactor |
| CN107519822A (en) * | 2016-06-21 | 2017-12-29 | 中国石化工程建设有限公司 | A kind of multi-bed layer shaft radial reactor |
| CN107519822B (en) * | 2016-06-21 | 2019-05-10 | 中国石化工程建设有限公司 | A kind of multi-bed layer shaft radial reactor |
| CN108854862A (en) * | 2017-05-11 | 2018-11-23 | 中国石化工程建设有限公司 | A kind of particulate matter bed supportive grid and radial flow reactors |
| CN108854862B (en) * | 2017-05-11 | 2021-05-18 | 中国石化工程建设有限公司 | Particulate matter bed layer support grid and radial flow reactor |
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