CN207533075U - A kind of mixing tube that partial gasification agent is substituted for carbon dioxide - Google Patents
A kind of mixing tube that partial gasification agent is substituted for carbon dioxide Download PDFInfo
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- CN207533075U CN207533075U CN201720972708.2U CN201720972708U CN207533075U CN 207533075 U CN207533075 U CN 207533075U CN 201720972708 U CN201720972708 U CN 201720972708U CN 207533075 U CN207533075 U CN 207533075U
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Abstract
A kind of mixing tube that partial gasification agent is substituted for carbon dioxide includes mixing tube (1),Carbon dioxide pipe (2),Oxygen hose (5),Conical pipe (6),Carbon dioxide distributor (7),Inside spin (8),External spiral (9),Grid (10),The upper end of mixing tube (1) is steam inlet (11),Lower end is gasification agent outlets (12) after mixing,Carbon dioxide distributor (7) is positioned at the top of mixing tube (1),Carbon dioxide distributor (7) is by being back taper cylinder (13),Straight tube (14) and annular slab (16) composition,There is inside spin (8) in straight tube (14),Foliated external spiral (9) is fixed in inside spin (8) outer circle,The rotation direction of external spiral (9) is oppositely oriented with inside spin (8),There is oxygen hose (5) in the lower part of mixing tube (1).The utility model has the advantages of safe and reliable, mixing duct is short, and flow resistance is small.
Description
Technical field
The utility model is related to a kind of mixing tubes that partial gasification agent is substituted for carbon dioxide, belong to derived energy chemical field
In coal chemical technology.
Background technology
Fixed bed crushed coal pressure gasifying technology is current most widely used Coal Gasification Technology, adaptable wide, into
This low plurality of advantages.Early-stage study proves：During fixed bed broken coal pressing technology, part water is substituted using carbon dioxide
Steam reduces gasification furnace furnace temperature and participates in gasification reaction process, can improve CO yield, improves H in synthesis gas2/ CO ratios, drop
Low phenol wastewater discharge capacity.CO is used to existing fixed bed crushed coal pressurized-gasification furnace2Partial gasification agent is substituted, there is higher warp
Ji and the value of environmental protection.CO2Substituting partial gasification agent needs CO2Be passed through in gasifying agent pipeline with steam and oxygen mix, due to work
In factory generation is in direct contact in order to avoid combustible gas and the pure oxygen of higher concentration in carbon dioxide containing a certain amount of fuel gas
The accidents such as flash burn, need before oxygen is passed through into gasifying agent, carbon dioxide are uniformly mixed with vapor flammable to reduce
Gas concentration.Since the space that existing equipment leaves gasifying agent mixing tube for is limited, gasify the larger unsuitable configuration flow resistance of agent flux
Excessive mixing arrangement, it is therefore desirable to design a kind of small volume, the relatively low gasifying agent mixing tube of flow resistance, while consider in designing
Prevent the security measures such as refluence.Again due to being related to pure oxygen, dynamic mixing arrangement causes danger it is possible that generating Mars, thus
There cannot be moving component in mixer.
Static mixer in pipeline mainly by setting the hybrid elements such as corrugated plating, helical blade, horizontal stripe at present, profit
With the flow-disturbing of hybrid element, the effects that shearing, displacement, which realizes fluid, to be mixed, and representative patents have：CN201310110117,
CN200380105245, CN200580034940, CN200710102527, CN201110341161, these mixers mainly lead to
It crosses a kind of original paper to be mixed or mixed being longitudinally arranged a variety of mixing sections along fluid flow path, generally deposit
It is longer in pipeline, the shortcomings of flow resistance is larger, be not suitable for that gasification agent flux is very big, the extremely limited gasification furnace transformation of repacking space rises
Grade；At the same time these mixers do not have the function of preventing flowing backwards, under special operation condition, it is possible to and it can flow backwards medium,
Cause security risk.
Invention content
The purpose of this utility model is to provide one kind securely and reliably, and mixing duct is short, and flow resistance is small to be replaced for carbon dioxide
For the gasifying agent mixing tube of partial gasification agent.
The utility model gasifying agent mixing tube be initially vapor the mouth that is passed through, later the circulation diameter of pipeline gradually become
It is narrow to enter one section of coarctation segment, there is helical blade inside constriction segment pipe, carbon dioxide vent, the diameter of diminution is around distributed with
The flow velocity of vapor can be improved with helical blade, suction effect is penetrated in generation, and carbon dioxide is sprayed in pressure itself and under penetrating suction effect
Enter in steam stream, and violent turbulent flow is generated under the flow-disturbing effect of spiral, preliminary mixing is carried out to gas, it is same to penetrate suction effect
When play the role of preventing reflux；After reduced diameter section, diameter becomes larger suddenly, helical blade continue along pipeline extension and
Outside is around several oppositely oriented helical blades, the gaseous mixture of expansion and the external spiral collision production for being approximately perpendicular to flow direction
The raw vortex with strong immixture, is further mixed；Gaseous mixture continuation flow backward, due to internal and external screw rotation direction not
Together, interior outer fluid constantly collides, crosses and mixes, and final realize is sufficiently mixed.After helical blade, oxygen hose stretches into gasifying agent
Mix tube hub, since vapour concentration is relatively high at pipeline center, from center be passed through oxygen can to avoid oxygen directly with pipe
The wall higher fluid contact of combustable gas concentration nearby.
To achieve these goals, technical solution is used by the utility model：
A kind of mixing tube that partial gasification agent is substituted for carbon dioxide, it includes mixing tube, carbon dioxide pipe, oxygen
Pipe, conical pipe, carbon dioxide distributor, inside spin, external spiral, grid, it is characterised in that mixing tube is pipe, mixing tube it is upper
End is steam inlet, and lower end is gasification agent outlets after mixing, and carbon dioxide distributor is located at the top of mixing tube, carbon dioxide point
For cloth device by being that back taper cylinder, straight tube and annular slab form, the larger diameter end of back taper cylinder is located at steam inlet in the following, falling
The smaller diameter end of tapered cylinder connects straight tube upper end, has carbon dioxide venthole on straight tube wall, annular slab is ring-shaped plectane, interior
Hole and the lower end of straight tube connect, and outer circle is fitted close with mixing inside pipe wall, have inside spin in straight tube, inside spin is that one group of center has
Axial screw blade, blade fixation is non-rotatable, and the lower end edge steam flow direction of inside spin extends downwardly out carbon dioxide point
Cloth device, and being connect with grid, carbon dioxide distributor forms toroidal cavity between tube wall with mixing, at toroidal cavity
Carbon dioxide pipe is communicated with mixing tube, and blade is fixed in the inside spin outer circle between grid and carbon dioxide distributor
The external spiral of shape, the rotation direction of external spiral and inside spin it is oppositely oriented, have oxygen hose, the end of oxygen hose in the lower part of mixing tube
It is inserted into inside mixing tube and bending downward, the end connection conical pipe larger diameter end of oxygen hose, taper tube wall is provided with strip
Oxygen venthole.
Rear thermocouple well is provided below in the thermocouple well before straight tube is provided below, grid.
The percent opening of the carbon dioxide venthole is 5-15%, aperture 2-5mm.
The external spiral is made of with inside spin multi-head spiral blade, and blade is 2-5 pieces.
The oxygen venthole percent opening is 20-30%, bar shaped hole width 2-5mm.
The helical blade of the inside spin is also configured to discontinuous multistage, each section discontinuous and mutually stagger 0~
The angle of ± 360/ (2 × N) degree, N is the head number of helical blade.
The utility model has the advantages that：
1. it is compact-sized, upgrading can be simply and easily carried out on existing equipment, improvement cost is low；
2. with smaller flow resistance, higher mixed effect is generated, effectively avoids the fuel gas in carbon dioxide gas,
It is mixed with oxygen high concentration；
3. using suction principle is penetrated, prevent from flowing backwards the higher security requirement of satisfaction.
Description of the drawings
Fig. 1 is the structural front view of the utility model.
Fig. 2 is the distributor pipe structure chart of the utility model.
Fig. 3 is a kind of gasifying agent mixing tube front view that partial gasification agent is substituted for carbon dioxide of the utility model,
Middle inside spin is using discontinuous blade staggeredly.
In figure, 1- mixing tubes, 2- carbon dioxide pipes, thermocouple well before 3-, thermocouple well after 4-, 5- oxygen hoses, 6- tapers
Pipe, 7- carbon dioxide distributors, 8- inside spins, 9- external spirals, 10- grids, 11- steam inlets, 12- gasification agent outlets, 13-
Back taper cylinder, 14- straight tubes, 15- carbon dioxide ventholes, 16- annular slabs, 17- oxygen ventholes.
Specific embodiment
Embodiment 1
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Anti- 47142 Kg/h of stokehold gasification agent steam flow, oxygen
Flow 6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
4440kg/h and 3000kg/h；The composition of carbon dioxide gas is CO2：94.4%；CH4：2.4%；N2：0.75%；H2：
0.8%；CO：0.8%；Other：0.85%.
A kind of mixing tube that partial gasification agent is substituted for carbon dioxide, as depicted in figs. 1 and 2：It includes mixing tube 1,
Carbon dioxide pipe 2, oxygen hose 5, conical pipe 6, carbon dioxide distributor 7, inside spin 8, external spiral 9, grid 10, mixing tube 1 are
Pipe, the upper end of mixing tube 1 is steam inlet 11, and lower end is gasification agent outlets 12 after mixing；Carbon dioxide distributor 7 is located at mixed
The top of pipe 1 is closed, carbon dioxide distributor 7 is by being that back taper cylinder 13, straight tube 14 and annular slab 16 form；Back taper is justified
The larger diameter end of cylinder 13 is located at steam inlet 11 in the following, 14 upper end of smaller diameter end connection straight tube of back taper cylinder 13；Straight tube 14
There is carbon dioxide venthole 15 on wall；Annular slab 16 is ring-shaped plectane, and endoporus is connect with the lower end of straight tube 14, and outer circle is with mixing
1 inner wall of pipe is fitted close；There is inside spin 8 in straight tube 14, inside spin 8 is that one group of center has axial screw blade, and blade is fixed not
Rotatable, the lower end edge steam flow direction of inside spin 8 extends downwardly out carbon dioxide distributor 7, and connect with grid 10；Two
Form toroidal cavity between 1 tube wall of carbonoxide distributor 7 and mixing tube, at cavity carbon dioxide pipe 2 with 1 phase of mixing tube
It is logical, it is fixed with foliated external spiral 9, outer spiral shell in 8 outer circle of inside spin between grid 10 and carbon dioxide distributor 7
The rotation direction of rotation 9 is oppositely oriented with inside spin 8, there is oxygen hose 5 in the lower part of mixing tube 1, and mixing is inserted into the end of oxygen hose 5
1 inside of pipe and bending downward, end connection 6 larger diameter end of conical pipe of oxygen hose 5,6 tube wall of conical pipe are provided with strip oxygen
Venthole 17.Thermocouple well 3 before being additionally provided with below the straight tube 14, grid 10 are additionally provided with rear thermocouple well 4 below.
The percent opening of the carbon dioxide venthole 15 is 5%, aperture 2mm.
The external spiral 9 is made of with inside spin 8 multi-head spiral blade, and blade is 2.
17 percent opening of oxygen venthole is 20%, bar shaped hole width 5mm.
Below with a specific work process, the gas that partial gasification agent is substituted for carbon dioxide a kind of to the utility model
The operation principle of agent mixing tube illustrates：
A kind of gasifying agent mixing tube that partial gasification agent is substituted for carbon dioxide of the utility model, in the process of running,
Steam enters mixing tube from the upper end of mixing tube main body 1 11, adds when flowing through distributor pipe 7 since runner becomes narrow gradually steam flow rate
Soon, while the inside spin 8 of setting has further speeded up the flow velocity of steam, generates and stronger penetrates suction effect；Carbon dioxide is from dioxy
Change carbon pipe 2 and enter the present apparatus, later into the toroidal cavity of carbon dioxide distributor 7, in pressure itself and penetrate suction effect
Under suction, intermediate flow channel is entered by the carbon dioxide venthole 17 on carbon dioxide distributor 7, due to penetrating the suction of suction
Effect and the comprehensive function of inside spin, generate stronger turbulent flow, have carried out preliminary mixing to steam and carbon dioxide, penetrated simultaneously
Inhaling effect can flow backwards to avoid steam or oxygen along carbon dioxide pipeline, increase safety；The mixing of steam and carbon dioxide
After carbon dioxide distributor 7, caliber becomes larger gas suddenly, and gaseous mixture is in the centrifugal action of itself expansion and rotation
Under dissipate and flow, and by the effect of external spiral 9 from pipeline center to surrounding, since 9 blade of external spiral is with helically flowing
The flow direction near vertical of gaseous mixture, gaseous mixture hit 9 blade of external spiral and generate vortex, generate great mixed effect, together
When in this section of region fluid by inside spin 8 and external spiral 9 collective effect, due to its rotation direction difference, inside and outside two plume
Body collides with each other, and generates the mixed effect of strength, and fluid is further mixed；Grid 10 plays limitation helical blade and prevents
The effect of unexpected displacement；By carbon dioxide distributor 7, fluid is substantially uniform after inside spin 8 and the mixing of external spiral 9, still
Gas concentration lwevel outline is higher than on the inside of fluid on the outside of fluid, and oxygen venthole is passed through oxygen from runner center, oxygen first with
The relatively low fluid contact of gas concentration lwevel, avoids fire and explosive risks to greatest extent.
Embodiment 2
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Anti- 47142 Kg/h of stokehold gasification agent steam flow, oxygen
Flow 6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
8880kg/h and 6000kg/h；The composition of carbon dioxide gas is CO2：92.4%；CH4：4.2%；N2：0.75%；H2：
1.0%；CO：0.8%；Other：0.85%.
The percent opening of the carbon dioxide venthole 15 is 10%, aperture 3.5mm.
The external spiral 9 is made of with inside spin 8 multi-head spiral blade, and blade is 3.
17 percent opening of oxygen venthole is 25%, bar shaped hole width 3.5mm.
Remaining is the same as embodiment 1
Embodiment 3
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Gasification agent steam flow 47142Kg/h, oxygen flow
6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
13320kg/h and 9000kg/h；The composition of carbon dioxide gas is CO2：92.4%；CH4：4.2%；N2：0.75%；H2：
1.0%；CO：0.8%；Other：0.85%.
The percent opening of the carbon dioxide venthole 15 is 15%, aperture 5mm.
The external spiral 9 is made of with inside spin 8 multi-head spiral blade, and blade is 5.
17 percent opening of oxygen venthole is 30%, bar shaped hole width 2mm.
Remaining is the same as embodiment 1.
Embodiment 4
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Anti- 47142 Kg/h of stokehold gasification agent steam flow, oxygen
Flow 6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
13320kg/h and 9000kg/h；The composition of carbon dioxide gas is CO2：92.4%；CH4：4.2%；N2：0.75%；H2：
1.0%；CO：0.8%；Other：0.85%.
On the basis of embodiment 3, the helical blade of inside spin 8 is arranged to discontinuous multistage, and every two grade blade is staggered
0°。
Remaining is the same as embodiment 3.
Embodiment 5
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Anti- 47142 Kg/h of stokehold gasification agent steam flow, oxygen
Flow 6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
13320kg/h and 9000kg/h；The composition of carbon dioxide gas is CO2：89.8%；CH4：6.2%；N2：0.75%；H2：
1.2%；CO：1.2%；Other：0.85%.
On the basis of embodiment 4, every two grade blade is staggered 18 °, and (direction being staggered, can be along rotary orientation or and spiral shell
It revolves oppositely oriented).
Remaining is the same as embodiment 4.
Helical blade is staggered certain angle, and fluid can be cut, then when flowing to next grade blade by helical blade
It is mixed with another fluid streams, mixed effect is strengthened by the effect cut-remixed.
Embodiment 6
Applied to DN3800 gasification furnaces, prevailing operating conditions are：Anti- 47142 Kg/h of stokehold gasification agent steam flow, oxygen
Flow 6777Nm3/h, operating pressure 4MPa, 350 degree of gasification agent temperature.The anti-furnace volume of carbon dioxide and replacement quantity of steam are respectively
13320kg/h and 9000kg/h；The composition of carbon dioxide gas is CO2：87%；CH4：8.8%；N2：0.35%；H2：
1.4%；CO：1.6%；Other：0.85%.
On the basis of embodiment 4, every two grade blade is staggered 36 °, and (direction being staggered, can be along rotary orientation or and spiral shell
It revolves oppositely oriented).
Remaining is the same as embodiment 4.
Claims (6)
1. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide, it includes mixing tube (1), carbon dioxide pipe (2), oxygen
Tracheae (5), conical pipe (6), carbon dioxide distributor (7), inside spin (8), external spiral (9), grid (10), it is characterised in that mixed
It is pipe to close pipe (1), and the upper end of mixing tube (1) is steam inlet (11), and lower end is gasification agent outlets (12) after mixing, titanium dioxide
Carbon distributor (7) positioned at the top of mixing tube (1), carbon dioxide distributor (7) be by back taper cylinder (13), straight tube (14) and
Annular slab (16) forms, and the larger diameter end of back taper cylinder (13) is located at steam inlet (11) in the following, back taper cylinder (13)
Smaller diameter end connects straight tube (14) upper end, has carbon dioxide venthole (15) on straight tube (14) wall, annular slab (16) is ring-shaped
Plectane, endoporus are connect with the lower end of straight tube (14), and outer circle is fitted close with mixing tube (1) inner wall, have inside spin in straight tube (14)
(8), inside spin (8) is that one group of center has axial screw blade, and blade fixes non-rotatable, the lower end edge steam of inside spin (8)
Flow direction extends downwardly out carbon dioxide distributor (7), and is connect with grid (10), and carbon dioxide distributor (7) is with mixing
Pipe (1) tube wall between form toroidal cavity, the carbon dioxide pipe (2) at toroidal cavity is communicated with mixing tube (1), positioned at
Foliated external spiral (9), outer spiral shell are fixed in inside spin (8) outer circle between grid (10) and carbon dioxide distributor (7)
The rotation direction of rotation (9) is oppositely oriented with inside spin (8), there is oxygen hose (5), the end of oxygen hose (5) in the lower part of mixing tube (1)
It is inserted into mixing tube (1) inside and bending downward, end connection conical pipe (6) larger diameter end of oxygen hose (5), conical pipe (6) pipe
Wall is provided with strip oxygen venthole (17).
2. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide as described in claim 1, it is characterised in that straight
Preceding thermocouple well (3) is provided below in cylinder (14), and rear thermocouple well (4) is provided below in grid (10).
3. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide as described in claim 1, it is characterised in that described
The percent opening of carbon dioxide venthole (15) is 5-15%, aperture 2-5mm.
4. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide as described in claim 1, it is characterised in that described
External spiral (9) is made of with inside spin (8) multi-head spiral blade, and blade is 2-5 pieces.
5. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide as described in claim 1, it is characterised in that described
Oxygen venthole (17) percent opening for 20-30%, bar hole width is 2-5mm.
6. a kind of mixing tube that partial gasification agent is substituted for carbon dioxide as described in claim 1, it is characterised in that described
The helical blade of inside spin be also configured to discontinuous multistage, each section is discontinuous and mutually stagger 0~± 360/ (2 × N)
The angle of degree, N are the head numbers of helical blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720972708.2U CN207533075U (en) | 2017-08-04 | 2017-08-04 | A kind of mixing tube that partial gasification agent is substituted for carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720972708.2U CN207533075U (en) | 2017-08-04 | 2017-08-04 | A kind of mixing tube that partial gasification agent is substituted for carbon dioxide |
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| Publication Number | Publication Date |
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| CN207533075U true CN207533075U (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720972708.2U Active CN207533075U (en) | 2017-08-04 | 2017-08-04 | A kind of mixing tube that partial gasification agent is substituted for carbon dioxide |
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| CN (1) | CN207533075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459835A (en) * | 2020-11-24 | 2021-03-09 | 中国地质大学（武汉） | Device for preventing crystal blockage of tunnel drainage system in karst area |
-
2017
- 2017-08-04 CN CN201720972708.2U patent/CN207533075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459835A (en) * | 2020-11-24 | 2021-03-09 | 中国地质大学（武汉） | Device for preventing crystal blockage of tunnel drainage system in karst area |
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