CN212425926U - Gas phase white carbon black combustion reactor - Google Patents
Gas phase white carbon black combustion reactor Download PDFInfo
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- CN212425926U CN212425926U CN202020684449.5U CN202020684449U CN212425926U CN 212425926 U CN212425926 U CN 212425926U CN 202020684449 U CN202020684449 U CN 202020684449U CN 212425926 U CN212425926 U CN 212425926U
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Abstract
The utility model provides a gas phase white carbon black combustion reactor, which comprises a hydrogen nozzle, a reaction gas nozzle and an air nozzle which are connected in sequence, wherein the hydrogen nozzle, the reaction gas nozzle, the air nozzle and the corresponding gas outlet are respectively provided with a hydrogen inlet, a reaction gas inlet, an air inlet and a corresponding gas outlet; a first annular flow channel for hydrogen to flow is formed between the hydrogen nozzle and the reaction gas nozzle, a second annular flow channel for reaction gas to move is formed between the reaction gas nozzle and the air nozzle, and the widths of outlet ends of the first annular flow channel and the second annular flow channel are gradually reduced along the gas flow direction; the utility model discloses an each gas will form strong venturi effect in the exit to make each reaction gas taken out fast from the mixing area, and realize gaseous quick homogeneous mixing through the fierce collision between gas, compare with prior art, it is not only mixed the degree of consistency high, simultaneously owing to removed guide plate structure (static mixer), consequently it can not take place blocking phenomenon, guarantees continuation, the steady operation of equipment.
Description
Technical Field
The utility model relates to a fumed silica production facility technical field, concretely relates to fumed silica combustion reactor.
Background
At present, the production process of fumed silica needs to fully mix air, hydrogen and reaction gas (silicon tetrachloride, trichlorosilane, methyl chlorosilane and the like) through a mixer and then introduce the mixture into a reactor for ignition and combustion, the mixer only has the function of mixed gas, the reactor only has the function of combustion, the structure is independent, the equipment volume is large, and meanwhile, a large number of matched pipelines need to be equipped for conveying materials; in the prior art, the mixer generally adopts a static mixer, and a large number of guide plates are arranged in the mixer to ensure uniform mixing, so that on one hand, the resistance of the airflow is large, the rapid flow of the airflow is influenced, the production efficiency is reduced, and the mixing effect is poor.
Meanwhile, for some silane raw materials with burning points crossing bottom, some fumed silica can be produced in the mixing period and attached to the baffle, the internal channel of the mixer can be blocked after long-time use, the overhauling frequency is increased, the overhauling difficulty is higher, and the source of the production raw materials of the fumed silica is greatly limited.
SUMMERY OF THE UTILITY MODEL
Poor to the mixed effect that exists among the prior art, the defect of easy jam, the utility model discloses a fumed silica combustion reactor, the utility model discloses not only mix the degree of consistency high, simultaneously because inner structure is simple, fumed silica who forms at the reaction initial stage will lose the attachment and can not take place to block up, guarantees continuous, the steady operation of equipment.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a gas-phase white carbon black combustion reactor comprises a hydrogen nozzle, a reaction gas nozzle and an air nozzle which are connected in sequence; the hydrogen nozzle, the reaction gas nozzle and the air nozzle are respectively provided with a hydrogen inlet, a reaction gas inlet, an air inlet and corresponding air outlets; a first annular flow channel which is communicated with the hydrogen inlet and surrounds the outer side of the reaction gas nozzle is formed between the hydrogen nozzle and the reaction gas nozzle, and a second annular flow channel which is communicated with the reaction gas inlet and surrounds the outer side of the air nozzle is formed between the reaction gas nozzle and the air nozzle; and the widths of the outlet ends of the first annular flow channel and the second annular flow channel are linearly decreased progressively along the moving direction of the airflow.
Preferably, the gas outlets of the hydrogen nozzle, the reaction gas nozzle and the air nozzle are inverted cones with large inlet ends and small outlet ends, the included angle alpha of the inner cone of the hydrogen nozzle is 70-150 degrees, the included angle beta of the inner cone of the reaction gas nozzle is 35-100 degrees, and the included angle gamma of the inner cone of the air nozzle is 25-55 degrees.
Preferably, the included angle α of the inner cone of the hydrogen nozzle is 115 °, the included angle β of the inner cone of the reaction gas nozzle is 70 °, and the included angle γ of the inner cone of the air nozzle is 35 °.
Preferably, the width of the annular flow path between the hydrogen nozzle and the reaction gas nozzle is 1 to 20mm, and the width of the annular flow path between the reaction gas nozzle and the air nozzle is 2 to 20 mm.
Preferably, the width of the annular flow path between the hydrogen nozzle and the reaction gas nozzle is 8mm, and the width of the annular flow path between the reaction gas nozzle and the air nozzle is 5 mm.
Preferably, the hydrogen nozzle is connected to the reaction gas nozzle through a coupling flange or a coupling screw, and the reaction gas nozzle is connected to the air nozzle through a coupling flange or a coupling screw.
Preferably, a flow guide cone is fixedly arranged in the air outlet of the hydrogen nozzle, and the flow guide cone is coaxial with the air outlet.
Preferably, the gas outlet of the hydrogen nozzle is integrally connected with a combustion pipe, and the length-diameter ratio of the combustion pipe is (2-20): 1.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model comprises a hydrogen nozzle, a reaction gas nozzle and an air nozzle which are connected in sequence and are respectively provided with a hydrogen inlet, a reaction gas inlet, an air inlet and a corresponding air outlet; a first annular flow channel for hydrogen to flow is formed between the hydrogen nozzle and the reaction gas nozzle, a second annular flow channel for reaction gas to move is formed between the reaction gas nozzle and the air nozzle, and the widths of outlet ends of the first annular flow channel and the second annular flow channel are gradually reduced along the gas flow direction; when the utility model is used, various gases are pressurized and then directly connected from the corresponding inlets and are sprayed out from the corresponding gas outlets at high speed, the annular flow channel ensures that the reaction gas completely wraps the air, and the hydrogen completely wraps the reaction gas and the air, thereby improving the contact area between the gases; meanwhile, because the widths of the outlet ends of the first annular flow channel and the second annular flow channel are gradually reduced along the airflow direction, the Venturi effect can show that larger pressure difference can be formed at two sides of each outlet, and countless vortexes are formed in a negative pressure area, so that corresponding gas is quickly extracted and pressurized, and the outlets of the gas are all positioned in the same area, so that different raw material gases are violently collided and mixed at the outlet ends, the utility model discloses a reasonable application of the Venturi effect ensures the mixing uniformity of different gases, and improves the mixing quality;
meanwhile, compared with the prior art, the utility model has no complex baffle structure inside, thereby simplifying the internal structure and facilitating the maintenance and overhaul of the equipment; meanwhile, as no baffle plate structure is arranged, when some silane with lower ignition point is used as a raw material for production, part of fumed silica particles generated in the raw material gas mixing stage due to the fact that the ignition point of the silane is too low do not have corresponding attachment structures, and blockage of a mixer is avoided, so that smoothness of an airflow channel is guaranteed, and mixed gas can be rapidly sprayed out to form reaction flame; the stability and the reliability of the production process of the low-ignition-point silane are improved; and because the mixer can not be blocked, the pressure of the ejected mixer is higher, and the stability of the reaction flame is ensured.
Meanwhile, the hydrogen nozzle, the reaction gas nozzle and the air nozzle are connected through the connecting flange or the connecting thread, so that the hydrogen nozzle, the reaction gas nozzle and the air nozzle can be conveniently disassembled, the maintenance and the disassembly are extremely convenient, and the difficulty of equipment maintenance and repair is greatly reduced;
the utility model discloses a mixed gas can directly ignite after spouting, compares with reactor and blender alternate segregation's among the prior art structure, the utility model discloses unite two into one reactor and blender, simplified reaction unit.
2. The inner cone included angle alpha of the hydrogen nozzle of the utility model is 70-150 degrees, preferably 115 degrees, and the inner cone included angle beta of the reaction gas nozzle is 35-100 degrees, preferably 70 degrees; the included angle gamma of the inner cone of the air nozzle is 25-55 degrees, preferably 35 degrees; the hydrogen nozzle inner cone included angle is larger than the reaction gas nozzle inner cone included angle, and the reaction gas nozzle inner cone included angle is larger than the air nozzle inner cone included angle, so that the outlet ends of the two annular flow channels are ensured to be in a gradually shrinking state, the requirements of the Venturi effect on the inner diameter of the pipeline are met, meanwhile, the product structure is simplified to the maximum degree through the design, and the reliability and the stability of equipment are improved.
3. The utility model discloses an annular runner width between hydrogen nozzle and the reaction gas nozzle is 1-20mm, preferably 8mm, and the annular runner width between reaction gas nozzle and the air nozzle is 2-20mm, preferably 5mm, makes hydrogen for the reaction be in excessive saturation state all the time, satisfies the needs of reaction, guarantees the stable formation of fumed silica.
4. The utility model discloses a link to each other through flange or connecting thread between hydrogen nozzle and the reaction gas nozzle, link to each other through flange or connecting thread between reaction gas nozzle and the air nozzle, be detachable connection structure between each part, the convenience makes each part demolish fast in the maintenance, compares with the complicated static mixer of traditional structure, and not only the dismouting is more convenient, washs cleaner, thoroughly simultaneously.
5. The utility model discloses it is provided with the water conservancy diversion awl still to fix in the gas outlet of hydrogen nozzle, the water conservancy diversion awl is coaxial with the gas outlet, cuts the reposition of redundant personnel to the gas mixture through the water conservancy diversion awl, further improves the degree of consistency that each feed gas mixes.
6. The utility model discloses gas outlet integrated into one piece at the hydrogen nozzle is connected with the combustion tube, and the draw ratio of combustion tube is (2-20):1, directly ignites reaction gas through the combustion tube, and the chaotic air current through the water conservancy diversion awl carries out the rectification simultaneously and mixes in the combustion tube, avoids appearing the turbulent flow in the reaction gas mixture that is used for the burning, guarantees the stability of burning flame.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention along the line A-A;
FIG. 3 is a schematic view of a hydrogen nozzle;
FIG. 4 is a schematic view of a reaction gas nozzle structure;
FIG. 5 is a schematic view of an air nozzle configuration;
reference numerals: 1. the hydrogen nozzle, 2, the reaction gas nozzle, 3, the air nozzle, 4, the hydrogen import, 5, the reaction gas import, 6, the air intlet, 7, the gas outlet, 8, first annular runner, 9, the second annular runner, 10, water conservancy diversion awl, 11, combustion tube, 12, linking bridge, 13, installing port.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following embodiments.
This embodiment is regarded as the utility model discloses a fumed silica burning reactor, its concrete structure is shown in figure 1, including hydrogen nozzle 1, reaction gas nozzle 2 and air nozzle 3, air inlet 6 and gas outlet 7 are provided with coaxially at the upper and lower both ends of air nozzle 3, and the flow area of its gas outlet 7 is along the air current direction of motion linear degressive, and its gas outlet 7 is the back taper shape that shrinks gradually to air nozzle 3 inboard, according to the needs of actual production operating mode, its interior cone contained angle gamma is 25 ° -55 °, sees according to actual burning reaction test result, the interior cone angle of air nozzle is the best with 35 °;
the upper end and the lower end of the reaction gas nozzle 2 are coaxially provided with a mounting port 13 and an air outlet 7, the side surface of the reaction gas nozzle is provided with a reaction gas inlet 5, the flow area of the air outlet 7 is linearly decreased gradually along the moving direction of the air flow, namely, the air outlet 7 is in an inverted cone shape gradually shrinking towards the inner side of the reaction gas nozzle, the included angle beta of the inner cone is 35-100 degrees according to the requirement of the actual production reaction working condition, and the inner cone angle of the reaction gas nozzle 3 is optimal to be 70 degrees according to the actual combustion reaction test result;
the upper end and the lower end of the hydrogen nozzle 1 are coaxially provided with a mounting port 13 and an air outlet 7, the side surface of the hydrogen nozzle is provided with a hydrogen inlet 3, the flow area of the air outlet 7 is linearly decreased gradually along the moving direction of the air flow, namely, the air outlet 7 is in an inverted cone shape which gradually shrinks towards the inner side of the hydrogen nozzle 1, the included angle alpha of the inner cone is 70-150 degrees according to the requirement of the actual production reaction working condition, and the inner cone angle of the hydrogen nozzle 1 is the best 115 degrees according to the actual combustion reaction test result; (ii) a
Meanwhile, during assembly of the utility model, the air nozzle 3 is inserted into the mounting port 13 of the reaction gas nozzle 2, the air nozzle 3 and the reaction gas nozzle 2 are fixedly connected through a connecting flange or a connecting thread, and meanwhile, the two gas outlets are ensured to be in a coaxial state; after the installation is finished, the upper branch pipe section of the air nozzle 3 completely covers the reaction gas inlet 5, and because the outer diameter of the air nozzle 3 is smaller than the inner diameter of the reaction gas nozzle 2, a second annular flow passage 9 communicated with the reaction gas inlet 5 is formed between the air nozzle 3 and the reaction gas nozzle 2, and meanwhile, the air nozzle 3 is completely wrapped by the second annular flow passage 9 so as to ensure that the reaction gas completely wraps the air; meanwhile, because the inner cone included angle of the reaction gas nozzle 2 is larger than that of the air nozzle 3, an annular air outlet with the width gradually reduced along the air flow direction is formed at the outlet end of the second annular flow channel 9, so that a stable Venturi effect is generated at the position; inserting the reaction gas nozzle 2 into the hydrogen nozzle 1 in the same way and fixedly connecting the reaction gas nozzle 2 and the hydrogen nozzle 1, wherein the inner cone included angle of the hydrogen nozzle 1 is larger than that of the reaction gas nozzle 2, so that the outlet end of the first annular flow channel 8 between the reaction gas nozzle 2 and the hydrogen nozzle 1 also presents an annular gas outlet which is gradually reduced along the gas flow direction, and a stable Venturi effect is ensured to be generated at the outlet end;
according to the actual working condition, the width of the branch pipe section of the first annular flow passage 8 is 1-20mm, the width of the branch pipe section of the second annular flow passage 9 is 2-20mm, through the actual combustion test, the width of the straight pipe section of the first annular flow passage 8 is 8mm, the width of the second annular flow passage 9 is 5mm, at the moment, the Venturi effect is strongest, and the mixing effect of all gases is optimal.
A flow guide cone 10 is further arranged in the gas outlet of the hydrogen nozzle 1 and is coaxial with the hydrogen nozzle 1, and the flow guide cone 10 is fixedly connected with the inner wall of the hydrogen nozzle 1 through a connecting support 12; the gas outlet of the hydrogen nozzle 1 is also integrally connected with a combustion pipe 11, the length-diameter ratio of the combustion pipe 11 is (2-20):1, and the outer surface of the combustion pipe 11 is also provided with a connecting flange.
The utility model discloses during the use, hydrogen, reaction gas and air are respectively from corresponding import input, the air will be followed corresponding gas outlet blowout, and reaction gas and hydrogen are then respectively from the exit end blowout of second annular runner and first annular runner, wherein reaction gas wraps up the air completely, hydrogen is then with reaction gas and air complete wrapping up, because export through flow area dwindles gradually, consequently will produce strong venturi effect in above-mentioned three exit positions, and form countless swirl in the negative pressure region, above-mentioned three kinds of gas will take place strong collision, thereby descend three kinds of gaseous homogeneous mixing at the motion state, gaseous mixing quality is improved;
meanwhile, compared with the static mixer in the prior art, the utility model cancels the baffle plate structure with complex structure, not only the internal structure is simplified, but also the maintenance and overhaul of the device are more convenient;
because no baffle plate structure is arranged, when some silane with lower ignition point is used as a raw material for production, part of fumed silica particles generated in the raw material gas mixing stage due to the low ignition point of the silane do not have corresponding attachment structures, so that the blockage of a mixer is avoided, the smoothness of an airflow channel is ensured, the mixed gas can be rapidly sprayed out to form reaction flame, the stability and the reliability of the production process of the silane with the low ignition point are improved, and the production raw material source of the fumed silica is expanded; and because the mixer can not take place the jam, consequently the mixer pressure that erupts is higher, and reaction flame will be more straight, guarantees reaction flame's stability.
Meanwhile, the hydrogen nozzle, the reaction gas nozzle and the air nozzle are connected through the connecting flange or the connecting thread, so that the hydrogen nozzle, the reaction gas nozzle and the air nozzle can be conveniently disassembled, the maintenance and the disassembly are extremely convenient, and the difficulty of equipment maintenance is greatly reduced.
Claims (8)
1. A gas-phase white carbon black combustion reactor comprises a hydrogen nozzle (1), a reaction gas nozzle (2) and an air nozzle (3) which are connected in sequence; the method is characterized in that: the hydrogen nozzle (1), the reaction gas nozzle (2) and the air nozzle (3) are respectively provided with a hydrogen inlet (4), a reaction gas inlet (5), an air inlet (6) and a corresponding air outlet (7); a first annular flow channel (8) which is communicated with the hydrogen inlet (4) and surrounds the outer side of the reaction gas nozzle (2) is formed between the hydrogen nozzle (1) and the reaction gas nozzle (2), and a second annular flow channel (9) which is communicated with the reaction gas inlet (5) and surrounds the outer side of the air nozzle (3) is formed between the reaction gas nozzle (2) and the air nozzle (3); and the widths of the outlet ends of the first annular flow passage (8) and the second annular flow passage (9) are linearly decreased progressively along the moving direction of the airflow.
2. The fumed silica combustion reactor according to claim 1, characterized in that: the gas outlets of the hydrogen nozzle (1), the reaction gas nozzle (2) and the air nozzle (3) are inverted cones with large inlet ends and small outlet ends, the inner cone included angle alpha of the hydrogen nozzle (1) is 70-150 degrees, the inner cone included angle beta of the reaction gas nozzle (2) is 35-100 degrees, and the inner cone included angle gamma of the air nozzle (3) is 25-55 degrees.
3. The fumed silica combustion reactor according to claim 2, characterized in that: the included angle alpha of the inner cone of the hydrogen nozzle (1) is 115 degrees, the included angle beta of the inner cone of the reaction gas nozzle (2) is 70 degrees, and the included angle gamma of the inner cone of the air nozzle (3) is 35 degrees.
4. The fumed silica combustion reactor according to claim 1, characterized in that: the width of the first annular flow channel (8) is 1-20mm, and the width of the second annular flow channel (9) is 2-20 mm.
5. The fumed silica combustion reactor according to any one of claims 1 or 4, characterized in that: the width of the first annular flow channel (8) is 8mm, and the width of the second annular flow channel (9) is 5 mm.
6. The fumed silica combustion reactor according to claim 1, characterized in that: the hydrogen nozzle (1) is connected with the reaction gas nozzle (2) through a connecting flange or connecting threads, and the reaction gas nozzle (2) is connected with the air nozzle (3) through a connecting flange or connecting threads.
7. The fumed silica combustion reactor according to claim 1, characterized in that: a flow guide cone (10) is fixedly arranged in the gas outlet (7) of the hydrogen nozzle (1), and the flow guide cone (10) is coaxial with the gas outlet (7).
8. The fumed silica combustion reactor according to claim 1, characterized in that: the gas outlet of the hydrogen nozzle (1) is integrally connected with a combustion pipe (11), and the length-diameter ratio of the combustion pipe (11) is (2-20): 1.
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| CN202020684449.5U CN212425926U (en) | 2020-04-29 | 2020-04-29 | Gas phase white carbon black combustion reactor |
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| CN202020684449.5U CN212425926U (en) | 2020-04-29 | 2020-04-29 | Gas phase white carbon black combustion reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339844A (en) * | 2021-06-22 | 2021-09-03 | 西安航天动力研究所 | Air hydrogen injection unit and combustion organization method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339844A (en) * | 2021-06-22 | 2021-09-03 | 西安航天动力研究所 | Air hydrogen injection unit and combustion organization method thereof |
| CN113339844B (en) * | 2021-06-22 | 2022-11-18 | 西安航天动力研究所 | Air hydrogen injection unit and combustion organization method thereof |
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