CN115784154B - Burner of natural gas reformer - Google Patents
Burner of natural gas reformer Download PDFInfo
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- CN115784154B CN115784154B CN202211316036.1A CN202211316036A CN115784154B CN 115784154 B CN115784154 B CN 115784154B CN 202211316036 A CN202211316036 A CN 202211316036A CN 115784154 B CN115784154 B CN 115784154B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000003345 natural gas Substances 0.000 title claims abstract description 42
- 239000004567 concrete Substances 0.000 claims abstract description 44
- 238000002407 reforming Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract 2
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 97
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 239000011324 bead Substances 0.000 claims description 40
- 238000002156 mixing Methods 0.000 claims description 29
- 239000011521 glass Substances 0.000 claims description 22
- 239000000919 ceramic Substances 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 21
- 229910021487 silica fume Inorganic materials 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 18
- 239000004570 mortar (masonry) Substances 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 15
- 229920001577 copolymer Polymers 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- BAPJBEWLBFYGME-UHFFFAOYSA-N acrylic acid methyl ester Natural products COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 12
- 230000032683 aging Effects 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 10
- -1 ceramsite Substances 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000003469 silicate cement Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims description 2
- 150000003949 imides Chemical class 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000006057 reforming reaction Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 29
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 13
- 239000011398 Portland cement Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical compound [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model relates to the technical field of natural gas reforming furnaces, and particularly discloses a natural gas reforming furnace burner which comprises a throat pipe penetrating through a reforming furnace wall and facing a reforming furnace reforming pipe, a feeding pipeline communicated with a throat pipe feeding end extending out of the furnace wall, and a drainage device fixed with a throat pipe discharging end extending into the furnace wall, wherein an air inlet and a natural gas inlet are respectively arranged on the feeding pipeline, an igniter is inserted into the drainage device, a thermocouple is arranged in the furnace wall, and a furnace wall protruding portion prepared by insulating concrete is arranged at a position, facing an outlet of the drainage device, on the furnace wall. The reformer burner can effectively avoid flame tube licking, prolong the service life of a reformer tube, ensure uniform temperature field distribution in a reformer hearth and ensure smooth reforming reaction.
Description
Technical Field
The utility model relates to the technical field of natural gas reforming furnaces, in particular to a burner of a natural gas reforming furnace.
Background
The natural gas primary reformer is one of the most critical equipment in the ammonia synthesis process, and is important to ensure the long-period operation of the equipment and the stable, efficient and safe operation of the reformer burner. For example, in the Chinese patent No. 202529837U, a reformer with a metal burner and a nonmetal burner combined with a reformer body is designed, and the technical problem of overhigh local temperature in the conventional nonmetal burner reformer is solved by combining the metal burner with the nonmetal burner reformer body.
In the using process of the traditional reformer burner, flame is sprayed out from the burner, and the phenomenon of direct contact with the reformer tube exists, namely, the flame licks the tube, so that the service life of the reformer tube is shortened, the temperature distribution of a hearth of the reformer is uneven, and the normal operation of the reaction is influenced. The Chinese Cheng Engineer company designs a two-stage furnace with a start burner in a patent CN2583075Y, thereby solving the problem that the service life is influenced because a pipe fitting provided with the start burner in the one-stage furnace is contacted by flame, but the patent only bypasses and does not improve the one-stage furnace burner.
Disclosure of Invention
The object of the present utility model is to provide a natural gas reformer nozzle that solves one of the problems mentioned in the background art above.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a natural gas reformer nozzle, includes wears to establish on the reformer oven just to the choke of reformer conversion pipe, with stretch out the outside choke feed end of oven and be linked together the pan feeding pipeline, with stretch into the fixed drainage device of choke discharge end in the oven mutually, be provided with air inlet and natural gas inlet on the pan feeding pipeline respectively, the drainage device interpolation establishes the igniter, be provided with the thermocouple in the oven, the position just facing the drainage device export on the oven is equipped with the oven bulge of being prepared by insulating concrete.
Through above-mentioned technical scheme, natural gas and air get into from the pan feeding pipeline, take under the shrink effect of throat and press blowout, through the ignition burning conversion of some firearm, drainage device can be with the flame of throat spun to both sides export drainage, avoids the flame to directly wash the transfer pipe, avoids flame to lick the pipe, thermocouple real-time supervision in the stove temperature, and the drainage device export just is because receiving the impact of high temperature flame easily to the position, so add the protruding part of oven wall by insulating concrete preparation, can reduce the reduction of being heated to the reformer life, the life of reformer transfer pipe is improved to the setting mode of above-mentioned nozzle.
Further, a static mixer is arranged in the feeding pipeline, an end inlet of the static mixer is communicated with an air inlet of the feeding pipeline, and a side wall inlet of the static mixer is communicated with a natural gas inlet of the feeding pipeline.
Through above-mentioned technical scheme, static mixer can increase the misce bene degree of natural gas and air for from throat spun gas mixture proportion is even, and the back conversion is also more even after the ignition, and flame temperature distribution is even, thereby makes furnace temperature more even.
Further, a discharge hole of the static mixer is communicated with a feed end of a throat pipe extending out of the furnace wall, and a gas diverter A is arranged at a communication position of the discharge hole of the static mixer, and a gas diversion hole A is formed in the gas diverter A.
Through the technical scheme, the gas flow divider A is uniformly provided with the gas flow dividing holes A, so that the mixed gas from the static mixer can be further uniformly dispersed through the flow divider and then sprayed out of the throat, the gas flow divider A and the static mixer form a double guarantee function, and the mixed gas sprayed out of the throat is uniformly mixed and dispersed, so that the subsequent conversion is uniform.
Further, a closing device matched with the gas diversion hole A is arranged on the gas diverter A, and the closing device is used for closing or opening the gas diversion hole A.
Through the technical scheme, the closing device can close or open the gas diversion hole A, namely, the opening size of the gas diversion hole A is regulated and controlled, so that the output size of the air flow is easy to control, the flame size and the uniformity degree of natural gas conversion are further controlled, the conversion efficiency and the hearth temperature distribution of the reformer are regulated and controlled, the reforming reaction is smoothly carried out, and the service life of a reformer tube is prolonged.
Further, the closing device is a baffle which is tangential to the gas diversion hole A and can cover the gas diversion hole A, the baffle is connected with the gas diverter A on the tangential side of the baffle and the gas diversion hole A through a rotating shaft perpendicular to the gas diverter A, and the baffle is also connected with the controller.
Through above-mentioned technical scheme, gas flow divider A and separation blade are connected to the rotation axis for thereby the separation blade can be rotatory around the rotation axis open and close gas flow divider hole A, and this rotation operation is all controlled by the controller, for automatic control, convenient operation, degree of automation is high. The controller here may be a PLC controller.
Further, the drainage device is a frame structure fixed on the outer wall of the discharge end of the throat, a pore plate of the discharge end of the throat stretches into the frame, one side of the frame, which is close to the conversion pipe, is of a baffle structure, two sides of the vertical baffle of the frame are provided with gas flow splitters B, the gas flow splitters B are provided with gas flow splitting holes B, a fixed shaft is installed at the center of the pore plate, and the output end of the fixed shaft stretches into the frame and is rigidly connected with the impeller.
Through above-mentioned technical scheme, frame construction is lighter in weight than the sealed cowling body, more convenient fixed, and here preferred frame construction is the tetragonal frame, and a face of frame is fixed on the discharge end of choke, and the discharge end of choke sets up the orifice plate, and the orifice plate stretches into in the frame, and the gas mixture that comes out from the choke like this takes place the combustion conversion at first in the frame, and the orifice plate is the output structure of choke, does not do not limit here, as long as guarantee that the air current is smooth exports. The face opposite to the face of the frame fixed at the discharge end of the throat pipe is the side, close to the conversion pipe, of the frame, the face is of a baffle structure, so that burning flame can be prevented from being directly sprayed to the conversion pipe to generate a pipe licking phenomenon, a fixed shaft is arranged at the center of a hole plate, the output end of the fixed shaft is rigidly connected with an impeller, then mixed gas and combustion gas coming out of the hole plate flow forwards along with rotation of the impeller, then the mixed gas and the combustion gas encounter the baffle to be blocked, the returned gas flows out of two sides of the frame, gas flow splitters B are arranged on two sides of the vertical baffle of the frame, and gas flow splitting holes B are arranged on the gas splitters B, so that the gas returned to the side flows into the conversion furnace chamber evenly after passing through the gas splitters B, heat and gas flow in the conversion furnace are even, a temperature field is well controlled, and smooth reaction is ensured.
Further, the baffle is an arc-shaped baffle with two sides bent towards the throat pipe end.
Through the technical scheme, the arc-shaped baffle plate structure avoids forming an inner corner between the baffle plate and the side surface, avoids the condition that air flow stays at the position, ensures that air flow can smoothly return to the air flow diverter B, and is uniform and smooth in output from the air flow diverter B.
Further, the heat insulation concrete is prepared by the following method:
1) Weighing 400-600 parts by weight of silicate cement, 550-600 parts by weight of ceramsite, 300-350 parts by weight of ceramic sand, 50-65 parts by weight of silica fume, 28-32 parts by weight of glass beads, 1-10 parts by weight of floating beads, 8-12 parts by weight of an additive, 20-30 parts by weight of alkaline water and 135-145 parts by weight of water;
2) Uniformly mixing alkaline water and water for standby;
3) Mixing silicate cement, ceramsite, ceramic sand and additive uniformly to prepare dry powder mortar;
4) Uniformly mixing silica fume, glass beads and floating beads, adding half of the mixed solution obtained in the step 2), uniformly stirring, and aging for 20-30 min;
5) And (3) uniformly mixing the dry powder mortar with the ageing product obtained in the step (4) and the other half of the mixed solution obtained in the step (2) to obtain the heat-insulating concrete.
According to the technical scheme, the silicate cement is used as the high-alumina cement cementing material, the requirements of high refractoriness and high strength can be met, and the ceramsite and the ceramic sand are suitable for being used as aggregate, so that the ceramic aggregate is light in density and high in strength, and meets the use requirements of the hearth wall of the reformer. The silica fume has extremely high activity, quick secondary hydration reaction, and can react with calcium hydroxide generated by cement hydration to form C-S-H gel, and react with C-S-H gel with high calcium-silicon ratio to form strengthThe high-calcium-silicon-ratio C-S-H gel has high activity effect, morphology effect and micro aggregate effect, and is one of excellent admixtures for preparing high-strength concrete because the silica fume also has large specific surface area and extremely small particle fineness. Besides the ceramic sand, the density of the glass beads is low and the glass beads are not easy to absorb water, so that the glass beads can be used as fine aggregate to effectively reduce the density of cement mortar. The glass beads are hollow tiny spheres, have the characteristics of high dispersion and good fluidity, and can further improve the fluidity of concrete. Meanwhile, due to isotropy and high filling property of the hollow glass beads, shrinkage can be reduced, and the cracking resistance of the concrete can be effectively improved. The floating beads are fly ash floating on water, have the characteristics of hollow body and light weight, are ideal heat insulation materials, can simultaneously meet the requirements of high strength and low heat conductivity coefficient when being used as filling aggregate, and the additive is an additive necessary for preparing concrete. In addition, in the preparation process, a small amount of alkaline water is added instead of ordinary water, so that the pH value of a reaction system is improved, the prepared concrete is stable in alkaline state and is particularly suitable for application scenes of a convex part on the wall of a hearth in a reformer nozzle of the utility model. The fine silica fume, glass beads and floating beads are uniformly mixed and then are aged by partial alkaline water, so that fine KHCO is preformed in the mixture 3 \NaHCO 3 Alkaline particles which are used as alkaline active centers and still exist in the subsequent further mixing and solidifying process, and form an adhesive and a stabilizer which exist between aggregates together with the cementing material, so that the strength and the fire resistance of the concrete are improved.
Further, the additive is a polycarboxylic acid high-performance water reducer and is selected from at least one of methacrylic acid/methyl acrylate copolymer, propenyl ether copolymer and amide/imide type polycarboxylic acid polymer.
Through the technical scheme, the water reducing rate of the polycarboxylic acid high-performance water reducer is more than 25%, and the preparation requirement of the heat insulation concrete can be well met. In addition, the water-gel ratio in the preparation of the heat insulation concrete is controlled to be 0.26-0.32. The methacrylic acid/methyl acrylate copolymer is produced by polymerization of methacrylic acid (MAA) and methoxy polyethylene glycol methacrylate ester (MAA-MPEG), and the typical mass ratio of MAA to MAA-MPEG is (1.5-6): 1, wherein the number of polyoxyethylene units in MAA-MPEG is 5-130, and a chain transfer agent mercaptan or methallyl sulfonate is added in the reaction process to adjust the relative molecular mass of the polymer.
Further, the alkaline water is prepared by adding water into edible alkali and blending, and the pH value is 9-10.
According to the technical scheme, the pH is too high, the prepared corrosion is too strong, and the pH is too low to play a role in enhancing the alkaline stable state, so that the pH of the alkaline water is preferably 9-10 through multiple tests.
The beneficial effects of the utility model are as follows:
1. the mixed gas is controlled to circulate into the reformer through the action of the throat pipe, and then flame is deviated through the arrangement of the drainage device and is directly sprayed to the direction of the reformer pipe and then enters the hearth, so that the occurrence of flame licking the reformer pipe is avoided, the service life of the reformer pipe is prolonged, and the natural gas reformer nozzle is simple in structure and complete in function.
2. The static mixer is arranged, so that the air inlet in the feeding pipeline can be uniformly mixed in advance and then led to the throat pipe, preparation is made for subsequent uniform conversion, and the static mixer is simple in structure and convenient to use.
3. The arrangement of the gas flow divider A and the static mixer form a double guarantee function, so that the mixed gas sprayed from the throat is guaranteed to be uniformly mixed and dispersed, and the subsequent conversion is convenient to be uniform.
4. The arrangement of the closing device on the gas diversion hole A can control the flame size and uniformity of natural gas conversion, thereby regulating and controlling the conversion efficiency and the hearth temperature distribution of the reformer, leading the reaction to be carried out smoothly and prolonging the service life of the reformer tube.
5. The closing device formed by the baffle plate and the rotating shaft is controlled by the controller, and the automatic control device is simple in structure, high in automation degree and accurate in control. A thermocouple is arranged in a hearth of the reformer, information is fed back to a controller in time, and the opening and closing of the closing device or the input of raw materials are controlled together, so that an intelligent control effect is achieved.
6. The frame structure of the drainage device is simple in structure, light in weight and high in strength, the fixed shaft in the drainage device is matched with the impeller to play a role in guiding airflow, the front end baffle and the gas flow divider B further play a role in guiding airflow, the whole device avoids flame licking the conversion tube, flame airflow in a hearth of the input conversion furnace is uniform, and a temperature field in the hearth is uniform. The preferred arcuate baffle design provides for smooth airflow.
7. The furnace wall bulge part prepared from the heat insulation concrete is arranged on the furnace wall of the natural gas reformer opposite to the outlet of the drainage device, and has good heat insulation performance and corrosion resistance, and the service life of the whole equipment is prolonged.
Drawings
FIG. 1 is a side view of a natural gas reformer burner of the present utility model;
FIG. 2 is a schematic view showing an opened state of a gas diversion hole A on a gas diverter A according to the present utility model;
FIG. 3 is a partially enlarged top view of the gas diversion holes A of the gas diverter A of the present utility model;
FIG. 4 is a schematic view showing a closed state of a gas diversion hole A on a gas diverter A according to the present utility model;
fig. 5 is a partially enlarged plan view showing a closed state of the gas distribution hole a on the gas distributor a according to the present utility model.
In the figure, 1, a conversion tube; 2. a furnace wall; 3. an air inlet; 4. a natural gas inlet; 5. a feeding pipeline; 501. a static mixer; 6. a gas splitter A; 601. a gas diversion hole A; 602. a baffle; 603. a rotation shaft; 7. a throat; 8. an orifice plate; 9. a frame; 901. a baffle; 10. a gas splitter B; 11. an impeller; 12. a fixed shaft; 13. an igniter; 14. a thermocouple; 15. a furnace wall bulge.
Detailed Description
The utility model will be further described with reference to the drawings and specific examples.
Example 1
The natural gas reformer burner, see fig. 1, comprises a throat pipe 7 arranged on a reformer furnace wall 2, wherein the throat pipe 7 is vertically inserted on the furnace wall 2, a small opening on one side extends into the furnace, and a large opening on the other side is exposed out of the furnace. The large opening of the throat pipe 7 exposed out of the furnace is connected with a feeding pipeline 5, and an air inlet 3 and a natural gas inlet 4 are formed in the feeding pipeline 5 and used for introducing natural gas and air into the throat pipe 7 through the pipeline so as to further introduce the natural gas and the air into the furnace through the throat pipe 7 for conversion. The small opening of the throat pipe 7 extending into the furnace is connected with a drainage device capable of avoiding the direct injection of the airflow flame into the converting pipe 1, the drainage device is arranged in the converting furnace, and one side of the drainage device is fixed on the small opening of the throat pipe 7. And the drainage device is positioned between the conversion pipe and the throat pipe of the natural gas conversion furnace. The igniter 13 is inserted into the drainage device to ignite the mixture gas from the throat 7. A thermocouple 14 is also provided in the wall 2 of the natural gas reformer of the present utility model for monitoring the temperature in the furnace in real time.
Referring to fig. 1, a pipeline mixer 501 is arranged in a feeding pipeline 5 of the natural gas reformer burner of the utility model, an end inlet of the pipeline mixer 501 is communicated with an air inlet 3, and a side wall inlet of the static mixer 501 is communicated with a natural gas inlet 4. In this way, a uniform mixing of the mixture before it is introduced into the throat 7 can be achieved. The discharge port of the static mixer 501 is provided with a gas diverter A6 at the position where the discharge port is communicated with the feed end of the throat pipe 7 extending out of the furnace wall 2, and a gas diversion hole A601 is arranged on the gas diverter A6, as shown in FIG. 2. The gas diverter A6 is provided with a closing device matched with the gas diversion hole A601, and the closing device is used for closing or opening the gas diversion hole A601. Specifically, referring to fig. 2-5, the closure device is a flap 602 tangential to the gas diversion aperture a601 that covers the gas diversion aperture a601, preferably a circular flap 602, the flap 602 being sized to completely cover the gas diversion aperture a601. The baffle 602 is connected to the gas diverter A6 on the tangential side to the gas diverter aperture a601 by a rotational axis 603 perpendicular to the gas diverter A6, and the baffle 602 is also connected to the controller. The rotation angle of the baffle plate 602 is controlled by the controller, so that the gas diversion holes A6 are opened and closed to different degrees. When the rotation angle of the baffle plate 602 is 180 degrees, the complete closing of the gas flow dividing holes can be realized, and when the rotation angle of the baffle plate 602 is smaller than 180 degrees or larger than 180 degrees, the partial or complete opening of the gas flow dividing holes can be realized, so that the aim of adjusting the gas flow can be fulfilled. When the gas diversion hole A601 is completely or partially opened, the gas diverter A6 plays a role of a gas distributor, when the gas diversion hole A601 is completely closed, the gas diverter A6 can be used as a baffle plate to separate the throat pipe 7 from the feeding pipeline 5 independently, so that the danger of gas combustion in the feeding pipeline 5 caused by tempering is avoided, and the safety of the whole burner is ensured.
Referring to fig. 1, the drainage device is a frame 9 structure fixed on the outer wall of the discharge end of the throat pipe 7, namely, the small opening end, is provided with a pore plate 8, the pore plate 8 stretches into the frame 9, and the pore plate 8 avoids a large amount of mixed gas from rushing out. The frame 9 of the drainage device is of a square frame 9 structure, not of a closed square cover body, one side of the frame 9 close to the throat pipe 7 is fixed on the outer wall of the pore plate 8, one side of the frame 9 close to the conversion pipe 1 is of a baffle 901 structure, the size of the baffle 901 is equal to the section of the conversion pipe 1 which is opposite to the baffle 901, and preferably, the baffle 901 is an arc-shaped baffle 901 with two sides bent towards the end of the throat pipe 7. The two sides of the vertical baffle 901 in the frame 9 are respectively provided with a gas diverter B10, the gas diverter B10 is provided with a gas diversion hole B (not shown in the figure), the center of the circle of the pore plate 8 is provided with a fixed shaft 12, the output end of the fixed shaft 12 is rigidly connected with an impeller 11, and the impeller 11 is arranged in the frame 9. The curved baffles 901 on both sides are preferably arc baffles, so that the air flow sprayed from the impeller 11 and directly striking the baffles 901 does not turn back in the original path, but turns back at a certain angle on both sides, thereby smoothly entering the air splitter B and being split from the air splitter B.
The furnace wall 2 is provided with a furnace wall bulge 15 constructed of insulating concrete at a position facing the gas outlet of the drainage device, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 400 parts of common silicate cement, 550 parts of ceramsite, 300 parts of ceramic sand, 50 parts of silica fume, 28 parts of glass beads, 1 part of floating beads, 8 parts of methacrylic acid/methyl acrylate copolymer, 20 parts of alkaline water and 135 parts of water; wherein the alkaline water is prepared by adding water into edible alkali, and the pH value is 9-10.
2) Uniformly mixing alkaline water and water for standby;
3) Uniformly mixing 425 ordinary Portland cement, ceramsite, ceramic sand and an additive to prepare dry powder mortar;
4) Uniformly mixing silica fume, glass beads and floating beads, adding half of the mixed solution obtained in the step 2), uniformly stirring, and aging for 20min;
5) And (3) uniformly mixing the dry powder mortar with the ageing product obtained in the step (4) and the other half of the mixed solution obtained in the step (2) to obtain the heat-insulating concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle is 125 degrees, the heat conductivity coefficient (average temperature 25 ℃) is 0.061W/(m.K), and the corrosion resistance is good; on CO 2 After 72 hours under air flow, the contact angle was 114℃and the thermal conductivity (average temperature 25 ℃) was 0.067W/(mK), and the corrosion resistance was good.
Comparative example 1
The furnace wall is provided with a furnace wall bulge 15 constructed of insulating concrete at a position facing the gas outlet of the drainage device, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 400 parts by weight of common silicate cement 425, 550 parts by weight of ceramsite, 300 parts by weight of ceramic sand, 50 parts by weight of silica fume, 28 parts by weight of glass beads, 1 part by weight of floating beads, 8 parts by weight of methacrylic acid/methyl acrylate copolymer and 135 parts by weight of water;
2) Uniformly mixing 425 ordinary Portland cement, ceramsite, ceramic sand, silica fume, glass beads, floating beads and methacrylic acid/methyl acrylate copolymer to prepare dry powder mortar;
3) And uniformly mixing the dry powder mortar with water to obtain the heat insulation concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle is 120 degrees, the heat conductivity coefficient (average temperature 25 ℃) is 0.091W/(m.K), and the corrosion resistance is good; on CO 2 After 72 hours under air flow, the contact angle was 104℃and the thermal conductivity (average temperature 25 ℃) was 0.207W/(mK), which was slightly corroded.
Example 2
The natural gas reformer burner configuration is the same as in example 1, and a furnace wall projection 15 constructed of insulating concrete is provided on the furnace wall at a position facing the gas outlet of the drainage means, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 600 parts by weight of 525 ordinary Portland cement, 600 parts by weight of ceramsite, 350 parts by weight of ceramic sand, 65 parts by weight of silica fume, 32 parts by weight of glass beads, 10 parts by weight of floating beads, 12 parts by weight of methacrylic acid/methyl acrylate copolymer, 30 parts by weight of alkaline water and 145 parts by weight of water; wherein the alkaline water is prepared by adding water into edible alkali, and the pH value is 9-10.
2) Uniformly mixing alkaline water and water for standby;
3) Uniformly mixing 525 ordinary Portland cement, ceramsite, ceramic sand and an additive to prepare dry powder mortar;
4) Uniformly mixing silica fume, glass beads and floating beads, adding half of the mixed solution obtained in the step 2), uniformly stirring, and aging for 30min;
5) And (3) uniformly mixing the dry powder mortar with the ageing product obtained in the step (4) and the other half of the mixed solution obtained in the step (2) to obtain the heat-insulating concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle is 135 degrees, the heat conductivity coefficient (average temperature 25 ℃) is 0.054W/(m.K) and the corrosion resistance is measuredThe etching property is good; on CO 2 After 72 hours under air flow, the contact angle was 120 degrees, the thermal conductivity (average temperature 25 ℃) was 0. W/(m.K), and the corrosion resistance was good.
Comparative example 2
The furnace wall is provided with a furnace wall bulge 15 constructed of insulating concrete at a position facing the gas outlet of the drainage device, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 600 parts by weight of 525 ordinary Portland cement, 600 parts by weight of ceramsite, 350 parts by weight of ceramic sand, 65 parts by weight of silica fume, 32 parts by weight of glass beads, 10 parts by weight of floating beads, 12 parts by weight of methacrylic acid/methyl acrylate copolymer and 145 parts by weight of water;
2) Uniformly mixing 525 ordinary Portland cement, ceramsite, ceramic sand, silica fume, glass beads, floating beads and methacrylic acid/methyl acrylate copolymer to prepare dry powder mortar;
3) And uniformly mixing the dry powder mortar with water to obtain the heat insulation concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle is 125 degrees, the heat conductivity coefficient (average temperature 25 ℃) is 0.094W/(m.K), and the corrosion resistance is good; on CO 2 After 72 hours under air flow, the contact angle was measured to be 100℃and the thermal conductivity (average temperature 25 ℃) was 0.202W/(mK), which was slightly corroded.
Example 3
The natural gas reformer burner configuration is the same as in example 1, and a furnace wall projection 15 constructed of insulating concrete is provided on the furnace wall at a position facing the gas outlet of the drainage means, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 500 parts by weight of 425 ordinary Portland cement, 570 parts by weight of ceramsite, 325 parts by weight of ceramic sand, 57 parts by weight of silica fume, 30 parts by weight of glass beads, 5 parts by weight of floating beads, 10 parts by weight of methacrylic acid/methyl acrylate copolymer, 25 parts by weight of alkaline water and 140 parts by weight of water; wherein the alkaline water is prepared by adding water into edible alkali, and the pH value is 9-10.
2) Uniformly mixing alkaline water and water for standby;
3) Uniformly mixing 425 ordinary Portland cement, ceramsite, ceramic sand and an additive to prepare dry powder mortar;
4) Uniformly mixing silica fume, glass beads and floating beads, adding half of the mixed solution obtained in the step 2), uniformly stirring, and aging for 25min;
5) And (3) uniformly mixing the dry powder mortar with the ageing product obtained in the step (4) and the other half of the mixed solution obtained in the step (2) to obtain the heat-insulating concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle is 130 degrees, the heat conductivity coefficient (average temperature 25 ℃) is 0.058W/(m.K), and the corrosion resistance is good; on CO 2 After 72 hours under air flow, the contact angle was 117℃and the thermal conductivity (average temperature 25 ℃) was 0.066W/(mK), which gave excellent corrosion resistance.
Comparative example 3
The furnace wall is provided with a furnace wall bulge 15 constructed of insulating concrete at a position facing the gas outlet of the drainage device, as shown in fig. 1. The heat insulation concrete is prepared by the following method:
1) Weighing 500 parts by weight of common silicate cement 425, 570 parts by weight of ceramsite, 325 parts by weight of ceramic sand, 57 parts by weight of silica fume, 30 parts by weight of glass beads, 5 parts by weight of floating beads, 10 parts by weight of methacrylic acid/methyl acrylate copolymer and 140 parts by weight of water;
2) Uniformly mixing 425 ordinary Portland cement, ceramsite, ceramic sand, silica fume, glass beads, floating beads and methacrylic acid/methyl acrylate copolymer to prepare dry powder mortar;
3) And uniformly mixing the dry powder mortar with water to obtain the heat insulation concrete.
Experimental data:
the prepared heat insulation concrete is smeared on a metal plate, and the coating thickness is 10mm and tested after 72 hours. The contact angle was measured to be 120℃and the thermal conductivity (average temperature 25 ℃) was measured to be0.078W/(m.K), and good corrosion resistance; on CO 2 After 72 hours under air flow, the contact angle was 107℃and the thermal conductivity (average temperature 25 ℃) was 0.186W/(mK), which was slightly corroded.
As can be seen from the experimental data of examples 1 to 3, according to the heat-insulating concrete of the embodiment of the utility model, since the alkali water is added, the aging preparation step is added, so that KHCO is formed in the obtained heat-insulating concrete 3 \NaHCO 3 The alkaline active center of the alkaline particles still exists in the curing process of the concrete at the later stage, the alkaline particles and other hydrates are dehydrated firstly when the temperature of the concrete is raised in the high-temperature application process of a converter, then the shapes of the particles are converted, and then the alkaline particles and other components such as cement and the like are combined with the matrix together with the further temperature rise to form a ceramic which is rich in Na between the colloid material and the aggregate matrix 2 O、K 2 The ceramic phase of O, thereby imparting high refractoriness and strength to the raised portions. The corrosion resistance is improved, and the natural gas reformer still has high strength and corrosion resistance in the high carbon dioxide atmosphere and has good applicability.
Claims (9)
1. The natural gas reformer burner is characterized by comprising a reformer furnace wall (2) which is arranged on the reformer furnace in a penetrating way and is opposite to the reformer furnace for reforming
The furnace comprises a throat pipe (7) of a pipe (1), a feeding pipeline (5) communicated with a feeding end of the throat pipe (7) extending out of a furnace wall (2), and a drainage device fixed with a discharging end of the throat pipe (7) extending into the furnace wall (2), wherein an air inlet (3) and a natural gas inlet (4) are respectively arranged on the feeding pipeline (5), an igniter (13) is inserted into the drainage device, a thermocouple (14) is arranged in the furnace wall (2), and a furnace wall bulge (15) prepared by insulating concrete is arranged at a position, opposite to an outlet of the drainage device, on the furnace wall (2);
the drainage device is fixed on the throat
(7) Frame (9) structure on the discharge end outer wall, orifice plate (8) of throat (7) discharge end stretch into in frame (9), one side that frame (9) are close to transfer pipe (1) is baffle (901) structure, and the both sides of frame (9) perpendicular to baffle (901) all are provided with gas flow divider B (10), be equipped with gas flow divider B on gas flow divider B (10), fixed axle (12) are installed in the centre of a circle department of orifice plate (8), and the output of fixed axle (12) stretches into in frame (9) and rigidly connected impeller (11).
2. A natural gas reformer burner as claimed in claim 1, characterised in that a static is provided in the feed conduit (5)
-a static mixer (501), the end inlet of the static mixer (501) being in communication with the air inlet (3) of the feed conduit (5), the side wall inlet of the static mixer (501) being in communication with the natural gas inlet (4) of the feed conduit (5).
3. A natural gas reformer burner as claimed in claim 2, characterized in that the static mixer (501)
The discharge port is communicated with the feed end of a throat pipe (7) extending out of the furnace wall (2), a gas diverter A (6) is arranged at the communication position, and a gas diversion hole A (601) is arranged on the gas diverter A (6).
4. A natural gas reformer burner as claimed in claim 3, characterised in that the gas diverter a (6) is provided with
And the closing device is matched with the gas diversion hole A (601) and is used for closing or opening the gas diversion hole A.
5. A natural gas reformer burner as claimed in claim 4 wherein the closing means is a split gas flow path
The baffle (602) which is tangential to the hole A (601) and can cover the gas diversion hole A (601), the baffle (602) is connected with the gas diverter A (6) on the tangential side of the baffle with the gas diversion hole A (601) through a rotating shaft (603) perpendicular to the gas diverter A (6), and the baffle (602) is also connected with the controller.
6. A natural gas reformer burner as claimed in claim 1, characterised in that the baffles (901) are provided on both sides towards the throat
A curved baffle (901) at the end of the tube (7).
7. A natural gas reformer burner as claimed in claim 1, wherein the insulating concrete is formed by the following method
The preparation method comprises the following steps:
1) Weighing 400-600 parts by weight of silicate cement, 550-600 parts by weight of ceramsite, 300-350 parts by weight of ceramic sand and 50-50 parts by weight of silica fume
65 parts by weight of glass beads, 28-32 parts by weight of floating beads, 1-10 parts by weight of additives, 8-12 parts by weight of alkaline water, 20-30 parts by weight of,
135-145 parts of water;
2) Uniformly mixing alkaline water and water for standby;
3) Mixing silicate cement, ceramsite, ceramic sand and additive uniformly to prepare dry powder mortar;
4) Uniformly mixing silica fume, glass beads and floating beads, adding half of the mixed solution obtained in the step 2), uniformly stirring, and ageing
Dissolving for 20-30 min;
5) Uniformly mixing the dry powder mortar with the ageing product obtained in the step 4) and the other half of the mixed solution obtained in the step 2),
and obtaining the heat insulation concrete.
8. The natural gas reformer burner of claim 7, wherein the admixture is a polycarboxylic acid water-reducing agent
An agent selected from methacrylic acid/methyl acrylate copolymer, propenyl ether copolymer, amide/imide type polycarboxylic acid polymer
At least one kind.
9. The natural gas reformer burner of claim 7, wherein the aqueous alkaline solution is formulated by adding water to an aqueous alkaline solution, and the pH is between 9 and 10.
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| CN202211316036.1A CN115784154B (en) | 2022-10-26 | 2022-10-26 | Burner of natural gas reformer |
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| CN202211316036.1A CN115784154B (en) | 2022-10-26 | 2022-10-26 | Burner of natural gas reformer |
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