CN113233418A - Method and equipment for preparing hydrogen from efficient methanol solution - Google Patents
Method and equipment for preparing hydrogen from efficient methanol solution Download PDFInfo
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- CN113233418A CN113233418A CN202110527815.5A CN202110527815A CN113233418A CN 113233418 A CN113233418 A CN 113233418A CN 202110527815 A CN202110527815 A CN 202110527815A CN 113233418 A CN113233418 A CN 113233418A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1047—Group VIII metal catalysts
- C01B2203/1052—Nickel or cobalt catalysts
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1205—Composition of the feed
- C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
- C01B2203/1217—Alcohols
- C01B2203/1223—Methanol
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Abstract
The invention provides a method and equipment for preparing hydrogen from a methanol solution with high efficiency, and relates to the technical field of hydrogen production equipment. The method comprises feeding into a cylinder as a hydrogen production reactor, generating high pressure H from methanol water solution under the action of catalyst2And CO2Mixing gas; gas-liquid separation; removing impurities from the molecular sieve adsorption bed. The invention solves the problems that the traditional connection mode of the hydrogen production reactor and a pipeline for conveying methanol water is complicated, and the hydrogen production reactor is large in size, so that operators are inconvenient to carry more tools to install the conveying pipe, and the service efficiency of the hydrogen production reactor is reduced.
Description
Technical Field
The invention relates to the technical field of hydrogen production equipment, in particular to a method and equipment for preparing hydrogen by using a methanol solution with high efficiency.
Background
Hydrogen energy is one of the most potential clean energy sources, industries such as hydrogen fuel cell automobiles, hydrogen fuel cell distributed power stations and the like grow up rapidly, and according to the difference of raw materials and process routes, hydrogen is mainly obtained by the following methods at present: hydrogen preparation from methanol and water, electrolysis of water, hydrogen produced by electrolysis of salt water in chlor-alkali industry, hydrocarbon steam reforming, partial oxidation of hydrocarbon, coal gasification and coal steam reforming, catalytic cracking of ammonia or methanol, and various by-products of petroleum refining and petrochemical processes.
When the hydrogen is prepared by using the methanol water, the methanol and the water are mixed in equal amount, the mixture enters the tubular hydrogen production reactor in a liquid form, a heat conduction oil circulation heating method is adopted, vaporization is not needed, an internal recombination reaction is generated under the action of a catalyst, and high-pressure hydrogen of 4.0-7.0 MPa is generated.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the traditional hydrogen production reactor is complicated in connection with a pipeline for conveying methanol water, and operators are inconvenient to carry more tools to install the conveying pipe due to the large size of the hydrogen production reactor, so that the use efficiency of the hydrogen production reactor is reduced, and provides a high-efficiency method and equipment for preparing hydrogen from a methanol solution.
In order to achieve the purpose, the invention adopts the following technical scheme: an efficient equipment for preparing hydrogen from methanol solution comprises a barrel and a fixing device, wherein a support lug is fixedly installed on the arc surface of the barrel, an upper end socket is fixedly installed at the upper end of the barrel by means of bolts, a flange is clamped at the upper end of the upper end socket, the arc surface of the barrel is hermetically communicated with a liquid inlet pipe, a fixing device is arranged on the surface of the liquid inlet pipe and comprises four connecting pieces, the four connecting pieces uniformly penetrate through the surface of the liquid inlet pipe in a sliding manner, a containing groove is uniformly formed in the arc surface of each connecting piece, a clamping plate is rotatably connected to the inner wall of each containing groove, the size of each connecting piece is matched with the size of the liquid inlet pipe, a screw rod is fixedly connected to the inner wall of each connecting piece, a connecting pipe is slidably connected to the arc surface of the screw rod, a sealing ring is fixedly connected to one side, close to the liquid inlet pipe, and a nut is in threaded connection with the arc surface of the screw rod, the surface of the nut is rotatably connected with the connecting pipe, the arc surface of the nut is fixedly connected with a limiting plate, and the surface of the limiting plate is in threaded connection with a driving rod.
Preferably, the connecting pipe corresponds the position fixedly connected with rubber circle of actuating lever, the one end and the rubber circle swing joint of actuating lever.
Preferably, the arc surface fixedly connected with lagging of barrel, the inner wall sliding connection of lagging has the slide, the surperficial threaded connection of slide has the dwang, the upper end of dwang is rotated and is connected with the layer board, the surface and the connecting pipe swing joint of layer board.
Preferably, one side of the supporting plate close to the sliding plate is evenly and fixedly connected with two limiting rods, and the lower ends of the limiting rods penetrate through the sliding plate in a sliding mode.
Preferably, the lower surface of journal stirrup is equipped with adjusting device, adjusting device includes three bracing piece, and is three the bracing piece is evenly welded on the surface of journal stirrup, the one end threaded connection that the journal stirrup was kept away from to the bracing piece has the screwed pipe, the lower extreme of screwed pipe rotates and is connected with the backing plate, the arc surface fixedly connected with gear of screwed pipe, the lower surface and the backing plate of gear rotate to be connected, the even three backup pad of fixedly connected with in surface of backing plate, the fixed surface of backup pad is connected with the spring, the one end fixedly connected with fixture block of backup pad is kept away from to the spring, the size of fixture block and the tooth size looks adaptation of the gear.
Preferably, the spring is internally and slidably connected with a pull rod, the lower end of the pull rod is fixedly connected with the clamping block, and one end, far away from the clamping block, of the pull rod penetrates through the supporting plate in a sliding mode.
The invention also provides a method for preparing hydrogen by using the methanol solution, which comprises the following steps:
the methanol and the water are mixed according to the mass amount and then fed into a cylinder body through a high-pressure plunger pump, the cylinder body is used as a hydrogen production reactor, and the methanol aqueous solution reacts under the action of a catalyst NiCuZn @ CS in the cylinder body to generate high-pressure H2And CO2Mixing gas;
introducing the high-pressure mixed gas into a gas-liquid separator for gas-liquid separation;
after the pressure of the mixed gas is reduced to 4MPa, impurities are removed from the mixed gas from bottom to top through a molecular sieve adsorption bed in an adsorption state.
Compared with the prior art, the invention has the advantages and positive effects that,
1. in the invention, by arranging the fixing device, when the connecting pipe is required to be arranged on the liquid inlet pipe, the clamping plate on the connecting piece is firstly rotated to enable the clamping plate to rotate into the accommodating groove of the connecting piece, then the connecting pipe is pulled to enable the connecting pipe with the screw rod and the connecting piece to be inserted into the liquid inlet pipe, then the clamping plate is rotated to enable the clamping plate to rotate out of the accommodating groove again, at the moment, the clamping plate can be clamped on the surface of the liquid inlet pipe, then the driving rod is rotated to enable the driving rod to move towards the direction far away from the rubber ring by means of the screw threads, then the nut is rotated to drive the connecting pipe to move towards the direction close to the liquid inlet pipe along the arc surface of the screw rod by means of the screw threads, when the connecting pipe moves to the port of the liquid inlet pipe, the sealing ring on the surface of the connecting pipe can contact the port of the liquid inlet pipe, finally the driving rod is rotated towards the opposite direction, so that the driving rod moves towards the direction close to the rubber ring by means of the screw threads to extrude the surface of the driving rod, the effect of fixation nut position has been reached, the effect of connecting the connecting pipe at the feed liquor pipe port has been reached, then pour into the feed liquor pipe with methanol-water from the connecting pipe, methanol-water enters into hydrogen production reactor from the feed liquor pipe and carries out hydrogen production, through setting up fixing device, reached and made things convenient for operating personnel to connect the effect of carrying methanol-water at the feed liquor pipe port with the connecting pipe fast, reached through setting up screw rod and nut and made things convenient for operating personnel still can install the effect on the feed liquor pipe with the connecting pipe not carrying other operation instrument, and then saved installation time, hydrogen production efficiency has been improved.
2. According to the invention, through the arrangement of the adjusting device, when the height of the hydrogen production reactor needs to be adjusted, the pull rod is firstly pulled upwards to drive the clamping block to move upwards, then the gear is rotated on the backing plate, the gear can drive the threaded pipe to rotate when rotating, the threaded pipe can drive the supporting rod to move up and down by means of the threads, and the supporting rod drives the cylinder to move up and down, so that the effect of adjusting the height of the cylinder is achieved.
Drawings
FIG. 1 is a schematic perspective view of an apparatus for producing hydrogen from methanol solution according to the present invention;
FIG. 2 is a schematic view of a part of the structure of an apparatus for producing hydrogen from methanol solution according to the present invention in FIG. 1;
FIG. 3 is a schematic structural diagram of a fixing device of an apparatus for producing hydrogen from methanol solution with high efficiency according to the present invention;
FIG. 4 is a schematic view of a part of the structure of FIG. 3 of an apparatus for producing hydrogen from methanol solution according to the present invention;
FIG. 5 is a schematic view of the structure at A in FIG. 4, showing an apparatus for producing hydrogen from methanol solution according to the present invention;
FIG. 6 is a schematic structural diagram of an apparatus regulating device for efficiently producing hydrogen from methanol solution according to the present invention;
FIG. 7 is a process flow diagram of a method for producing hydrogen from methanol solution with high efficiency according to the present invention.
Illustration of the drawings: 1. a barrel; 2. supporting a lug; 3. an upper end enclosure; 4. a flange; 5. a liquid inlet pipe; 6. a fixing device; 601. a connecting member; 602. a receiving groove; 603. clamping a plate; 604. a screw; 605. a nut; 606. a connecting pipe; 607. a limiting plate; 608. a drive rod; 609. a rubber ring; 610. sheathing; 611. a slide plate; 612. rotating the rod; 613. a support plate; 614. a limiting rod; 7. an adjustment device; 71. a support bar; 72. a threaded pipe; 73. a base plate; 74. a gear; 75. a support plate; 76. a spring; 77. a clamping block; 78. a pull rod.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
The specific arrangement and function of the fixing means 6 and the adjusting means 7 will be described in detail below.
As shown in fig. 3 and 4, fixing device 6 includes four connecting pieces 601, four connecting pieces 601 evenly slide and run through the surface of feed liquor pipe 5, the circular arc surface of connecting piece 601 has evenly been seted up and has been accommodated groove 602, the inner wall of accommodating groove 602 rotates and is connected with cardboard 603, the size of connecting piece 601 and the size looks adaptation of feed liquor pipe 5, the inner wall fixedly connected with screw rod 604 of connecting piece 601, the circular arc surface sliding connection of screw rod 604 has connecting pipe 606, one side fixedly connected with sealing washer that connecting pipe 606 is close to feed liquor pipe 5, the circular arc surface threaded connection of screw rod 604 has nut 605, the surface and the connecting pipe 606 of nut 605 rotate and are connected.
The circular arc surface of the nut 605 is fixedly connected with a limiting plate 607, and the surface of the limiting plate 607 is in threaded connection with a driving rod 608.
The connecting tube 606 is fixedly connected with a rubber ring 609 corresponding to the position of the driving rod 608, and one end of the driving rod 608 is movably connected with the rubber ring 609.
The circular arc surface of the cylinder 1 is fixedly connected with a sleeve plate 610, the inner wall of the sleeve plate 610 is connected with a sliding plate 611 in a sliding manner, the surface of the sliding plate 611 is connected with a rotating rod 612 in a threaded manner, the upper end of the rotating rod 612 is connected with a supporting plate 613 in a rotating manner, and the surface of the supporting plate 613 is movably connected with the connecting pipe 606.
Two limiting rods 614 are uniformly and fixedly connected to one side of the supporting plate 613 close to the sliding plate 611, and the lower ends of the limiting rods 614 penetrate through the sliding plate 611 in a sliding manner.
The whole fixing device 6 achieves the effect that by arranging the fixing device 6, when the connecting pipe 606 is required to be installed on the liquid inlet pipe 5, the clamping plate 603 on the connecting piece 601 is firstly rotated, the clamping plate 603 is rotated into the accommodating groove 602 of the connecting piece 601, then the connecting pipe 606 is pulled, the connecting pipe 606 with the screw 604 and the connecting piece 601 is inserted into the liquid inlet pipe 5, then the clamping plate 603 is rotated again, the clamping plate 603 is rotated out of the accommodating groove 602 again, at the moment, the clamping plate 603 is clamped on the surface of the liquid inlet pipe 5, then the driving rod 608 is rotated, the driving rod 608 is moved in the direction far away from the rubber ring 609 by virtue of threads, then the nut 605 is rotated, the nut 605 drives the connecting pipe 606 to move in the direction close to the liquid inlet pipe 5 along the arc surface of the screw 604 by virtue of the threads, after the connecting pipe 606 is moved to contact with the port of the liquid inlet pipe 5, at the moment, the sealing ring on the surface of the connecting pipe 606 contacts with the port of the liquid inlet pipe 5, finally, the driving rod 608 is rotated in the opposite direction, the driving rod 608 is made to move the driving rod 608 to the direction close to the rubber ring 609 by means of threads to extrude the surface of the rubber ring 609, the effect of fixing the position of the nut 605 is achieved, the effect of connecting the connecting pipe 606 at the port of the liquid inlet pipe 5 is achieved, then methanol water is injected into the liquid inlet pipe 5 from the connecting pipe 606, the methanol water enters the hydrogen production reactor from the liquid inlet pipe 5 to produce hydrogen, through the arrangement of the fixing device 6, the effect of enabling an operator to connect the connecting pipe 606 at the port of the liquid inlet pipe 5 to convey the methanol water quickly is achieved, the effect of enabling the operator to install the connecting pipe 606 on the liquid inlet pipe 5 without carrying other operation tools is achieved through the arrangement of the screw rod 604 and the nut 605, the installation time is saved, and the.
As shown in fig. 1 and 6, an adjusting device 7 is arranged on the lower surface of the support lug 2, the adjusting device 7 includes three support rods 71, the three support rods 71 are uniformly welded on the surface of the support lug 2, one end of each support rod 71, which is far away from the support lug 2, is in threaded connection with a threaded pipe 72, the lower end of each threaded pipe 72 is connected with a backing plate 73 in a rotating manner, a gear 74 is fixedly connected to an arc surface of each threaded pipe 72, the lower surface of each gear 74 is connected with the backing plate 73 in a rotating manner, three support plates 75 are uniformly and fixedly connected to the surface of each backing plate 73, a spring 76 is fixedly connected to the surface of each support plate 75, a clamping block 77 is fixedly connected to one end, which is far away from the support plate 75, the size of each clamping block 77 is matched with the tooth size of the gear 74, a pull rod 78.
The whole adjusting device 7 achieves the effect that by arranging the adjusting device 7, when the height of the hydrogen production reactor needs to be adjusted, the pull rod 78 is pulled upwards firstly, so that the pull rod 78 drives the clamping block 77 to move upwards, then the gear 74 is rotated, the gear 74 rotates on the backing plate 73, the threaded pipe 72 is driven to rotate when the gear 74 rotates, the threaded pipe 72 rotates to drive the supporting rod 71 to move up and down by virtue of threads, the supporting rod 71 drives the cylinder body 1 to move up and down, the effect of adjusting the height of the cylinder body 1 is achieved, after the height of the cylinder body 1 is adjusted, the pull rod 78 is loosened, at the moment, the spring 76 gives elastic force to the clamping block 77, so that the clamping block 77 is clamped in the teeth of the gear 74 again, the effect of fixing the threaded pipe 72 and further fixing the position of the supporting rod 71 is achieved, the effect of facilitating an operator to quickly adjust the supporting height of the cylinder body 1 by arranging, thereby achieving the effect of improving the hydrogen production efficiency.
Referring to fig. 1-7, the present invention further provides a method for preparing hydrogen from methanol solution with high efficiency, comprising the following steps:
methanol and water are mixed according to the mass ratio of 1:1 and then fed into a cylinder 1 through a high-pressure plunger pump 9, the cylinder 1 is used as a hydrogen production reactor, the working temperature of the cylinder 1 is 160-250 ℃, the pressure is 4-9 MPa, heat which is continuously constant is provided by a heat conduction oil/steam/electric heating device, and a methanol water solution reacts under the action of a catalyst NiCuZn @ CS in the cylinder 1 to generate high-pressure H2And CO2And (4) mixing the gases. Introducing the high-pressure mixed gas into a gas-liquid separator 8 for gas-liquid separation, reducing the pressure of the mixed gas to 4MPa through an electromagnetic valve PV101, and removing CO from bottom to top through a molecular sieve adsorption bed 10 in an adsorption state2And the like. When the adsorption bed A is subjected to adsorption operation, the B is subjected to decompression and desorption, pure H2 is discharged from the top of the adsorption bed A and sent to a compressor of a hydrogenation station for compression, and compressed gas enters a hydrogen storage tank for later use; the desorbed CO2 is discharged from the top of the adsorption bed B and can be collected and bottled for use. One of the two molecular sieve adsorption beds adsorbs one desorption, and the two molecular sieve adsorption beds are used alternately and continuously. When the adsorption bed B is released to normal pressure, the desorption is completed. The adsorption bed B carries out adsorption, and the adsorption bed A carries out decompression desorption. The obtained high-purity hydrogen can be directly supplied to various hydrogen application places, such as catalytic hydrogenation reaction and hydrogen battery utilization in pharmaceutical industry and chemical industry, and can also be further pressurized and compressed by a hydrogen compressor for storage and standby.
The catalyst NiCuZn @ CS has the performance of hydrogen production by methanol low-temperature liquid-phase reforming at different temperatures, and the result is shown in Table 1.
Table 1:
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (8)
1. The utility model provides an equipment of hydrogen is prepared to efficient methyl alcohol solution, includes barrel (1) and fixing device (6), its characterized in that: the arc surface of the barrel body (1) is fixedly provided with a support lug (2), the upper end of the barrel body (1) is fixedly provided with an upper seal head (3) by means of a bolt, a flange (4) is clamped at the upper end of the upper seal head (3), the arc surface of the barrel body (1) is communicated with a liquid inlet pipe (5) in a sealing manner, a fixing device (6) is arranged on the surface of the liquid inlet pipe (5), the fixing device (6) comprises four connecting pieces (601), the four connecting pieces (601) uniformly slide to penetrate through the surface of the liquid inlet pipe (5), the arc surface of the connecting piece (601) is uniformly provided with an accommodating groove (602), the inner wall of the accommodating groove (602) is rotatably connected with a clamping plate (603), the size of the connecting piece (601) is matched with the size of the liquid inlet pipe (5), the inner wall of the connecting piece (601) is fixedly connected with a screw rod (604), and the arc surface of the screw rod (604) is slidably connected with a connecting pipe (606), one side of the connecting pipe (606) close to the liquid inlet pipe (5) is fixedly connected with a sealing ring, the arc surface of the screw rod (604) is in threaded connection with a nut (605), and the surface of the nut (605) is rotationally connected with the connecting pipe (606).
2. The high-efficiency methanol solution hydrogen production equipment according to claim 1, characterized in that: the arc surface of the nut (605) is fixedly connected with a limiting plate (607), and the surface of the limiting plate (607) is in threaded connection with a driving rod (608).
3. The high-efficiency methanol solution hydrogen production equipment according to claim 2, characterized in that: the connecting pipe (606) is fixedly connected with a rubber ring (609) at a position corresponding to the driving rod (608), and one end of the driving rod (608) is movably connected with the rubber ring (609).
4. The high-efficiency methanol solution hydrogen production equipment according to claim 1, characterized in that: the arc surface fixedly connected with lagging (610) of barrel (1), the inner wall sliding connection of lagging (610) has slide plate (611), the surperficial threaded connection of slide plate (611) has dwang (612), the upper end of dwang (612) is rotated and is connected with layer board (613), the surface and the connecting pipe (606) swing joint of layer board (613).
5. The high-efficiency methanol solution hydrogen production equipment according to claim 4, characterized in that: one side of the supporting plate (613) close to the sliding plate (611) is uniformly and fixedly connected with two limiting rods (614), and the lower ends of the limiting rods (614) penetrate through the sliding plate (611) in a sliding mode.
6. The high-efficiency methanol solution hydrogen production equipment according to claim 1, characterized in that: the lower surface of the support lug (2) is provided with an adjusting device (7), the adjusting device (7) comprises three support rods (71), the three support rods (71) are uniformly welded on the surface of the support lug (2), one end of the support rod (71) far away from the support lug (2) is connected with a threaded pipe (72) in a threaded manner, the lower end of the threaded pipe (72) is rotatably connected with a backing plate (73), the circular arc surface of the threaded pipe (72) is fixedly connected with a gear (74), the lower surface of the gear (74) is rotationally connected with a backing plate (73), three supporting plates (75) are uniformly and fixedly connected with the surface of the backing plate (73), a spring (76) is fixedly connected to the surface of the supporting plate (75), a clamping block (77) is fixedly connected to one end, far away from the supporting plate (75), of the spring (76), the size of the fixture block (77) is matched with the tooth size of the gear (74).
7. The efficient methanol solution hydrogen production equipment according to claim 6, characterized in that: the inside sliding connection of spring (76) has pull rod (78), the lower extreme and fixture block (77) fixed connection of pull rod (78), the one end slip that fixture block (77) was kept away from in pull rod (78) runs through backup pad (75).
8. A high-efficiency method for preparing hydrogen from methanol solution is characterized by comprising the following steps: the method comprises the following steps:
methanol and water are mixed according to the mass ratio of 1:1, then the mixture is fed into a cylinder (1) through a high-pressure plunger pump (9), the cylinder (1) is used as a hydrogen production reactor, and methanol aqueous solution reacts under the action of a catalyst NiCuZn @ CS in the cylinder (1) to generate high-pressure H2And CO2Mixing gas;
introducing the high-pressure mixed gas into a gas-liquid separator (8) for gas-liquid separation;
after the pressure of the mixed gas is reduced to 4MPa, impurities are removed from the mixed gas from bottom to top through a molecular sieve adsorption bed (10) in an adsorption state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110527815.5A CN113233418A (en) | 2021-05-14 | 2021-05-14 | Method and equipment for preparing hydrogen from efficient methanol solution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110527815.5A CN113233418A (en) | 2021-05-14 | 2021-05-14 | Method and equipment for preparing hydrogen from efficient methanol solution |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4494780A (en) * | 1981-08-17 | 1985-01-22 | Romac Industries, Inc. | Liquid piping saddle assembly connecting a branch pipe to a main pipe |
| CN208587693U (en) * | 2018-07-21 | 2019-03-08 | 骆兆志 | A kind of non-destructive testing bracket that easy of rise is adjusted |
| CN109956450A (en) * | 2019-04-30 | 2019-07-02 | 广西氢朝能源科技有限公司 | A kind of instant hydrogen generating system of methanol-water and its hydrogen production process |
| CN211059539U (en) * | 2019-09-21 | 2020-07-21 | 西安永夷建设工程有限责任公司 | Pipeline interface structure |
| CN212203741U (en) * | 2020-05-13 | 2020-12-22 | 沈阳星光技术陶瓷有限公司 | Quality detection equipment is used in carborundum production |
-
2021
- 2021-05-14 CN CN202110527815.5A patent/CN113233418A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4494780A (en) * | 1981-08-17 | 1985-01-22 | Romac Industries, Inc. | Liquid piping saddle assembly connecting a branch pipe to a main pipe |
| CN208587693U (en) * | 2018-07-21 | 2019-03-08 | 骆兆志 | A kind of non-destructive testing bracket that easy of rise is adjusted |
| CN109956450A (en) * | 2019-04-30 | 2019-07-02 | 广西氢朝能源科技有限公司 | A kind of instant hydrogen generating system of methanol-water and its hydrogen production process |
| CN211059539U (en) * | 2019-09-21 | 2020-07-21 | 西安永夷建设工程有限责任公司 | Pipeline interface structure |
| CN212203741U (en) * | 2020-05-13 | 2020-12-22 | 沈阳星光技术陶瓷有限公司 | Quality detection equipment is used in carborundum production |
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Application publication date: 20210810 |
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