CN113418300B - High efficiency boiler heat conduction oil pipeline - Google Patents
High efficiency boiler heat conduction oil pipeline Download PDFInfo
- Publication number
- CN113418300B CN113418300B CN202110719282.0A CN202110719282A CN113418300B CN 113418300 B CN113418300 B CN 113418300B CN 202110719282 A CN202110719282 A CN 202110719282A CN 113418300 B CN113418300 B CN 113418300B
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- China
- Prior art keywords
- pipe
- pipeline
- joint
- tube
- flow blocking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003921 oil Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 239000010802 sludge Substances 0.000 abstract description 9
- 230000008021 deposition Effects 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a high-efficiency boiler heat-conducting oil pipeline, which effectively solves the problems that carbon deposition is easy to form on the inner wall of a heat-conducting oil pipeline, the heat exchange efficiency is low, and the bent pipe is easy to be blocked locally; the technical scheme includes that the hydraulic pipeline comprises a plurality of pipeline sections, a plurality of sections of pipeline bodies and a plurality of U-shaped connectors, wherein a cross rod perpendicular to an axis is fixed in each pipeline section, a vertical rod coincident with the axis is fixed on each cross rod, a flow blocking block is arranged on each vertical rod in a penetrating mode, the flow area of the flow blocking block is identical to that of the rest parts of a pipeline, a spring is arranged between each flow blocking block and each cross rod, a liquid pipeline is arranged on the side wall of each pipeline section, two ends of each liquid pipeline are respectively provided with a plunger, hydraulic oil is arranged between the two plungers, an alarm is arranged outside each pipeline section, and a switch of the alarm is arranged at the outer end part of each liquid pipeline; according to the invention, on one hand, the speed of carbon deposition on the inner wall of the pipeline can be reduced, on the other hand, the heat exchange efficiency of the heat conduction oil pipe can be effectively improved, and in addition, the oil sludge deposited at the bent pipe can be automatically collected and is convenient to clean.
Description
Technical Field
The invention relates to the field of boiler equipment, in particular to a high-efficiency boiler heat-conducting oil pipeline.
Background
The organic heat carrier boiler is a boiler which uses high-temperature heat conducting oil as a heat medium to exchange heat, and the heat conducting oil is subjected to oxidative polymerization or condensation reaction at high temperature for a long time to form oil sludge and carbon deposit; when the heat conduction oil flows in the oil pipe, the outer-layer fluid is subjected to frictional resistance on the inner wall of the pipeline, and the inner-layer fluid at the axis has no frictional resistance, so that the outer-layer flow rate is low, the inner-layer flow rate is high, and the flow rate difference brings about two defects: firstly, the adhesion flow speed of the outer layer is low, so that carbon deposit is easier to deposit and solidify on the inner wall of the pipeline, and the carbon deposit forming speed is high; secondly, under the condition of the same total flow, the flow rate of the outer layer is low, the flow rate of the inner layer is high, so that the flow rate of the outer layer is small, the flow rate of the inner layer is large, and the heat exchange between the heat conduction oil and the pipeline wall mainly occurs in the outer layer fluid, so that a large amount of heat conduction oil flows through the inner layer and cannot directly participate in heat exchange with the pipeline wall in a single pass, and the flow rate of the outer layer directly participating in heat exchange is smaller, so that the heat exchange efficiency is low; in addition, the oil sludge formed in the pipeline is mainly deposited at the reversing position of the pipeline, so that the bent pipe is extremely easy to form local blockage to influence the operation of the whole equipment.
Disclosure of Invention
The invention provides a high-efficiency boiler heat-conducting oil pipeline, which aims to solve the problems that carbon deposition is easy to form on the inner wall of a heat-conducting oil pipe, the heat exchange efficiency is low and the part of a bent pipe is easy to be blocked.
The technical scheme is that the high-efficiency boiler heat-conducting oil pipeline comprises a plurality of pipe joints, a plurality of sections of pipe bodies and a plurality of U-shaped connectors, wherein the pipe joints are short pipes, the pipe bodies are long pipes, the pipe joints and the pipe bodies are alternately arranged and connected along an axis, the U-shaped connectors are arranged at the steering position of the pipeline, so that the heat-conducting oil pipeline which is arranged in an S shape is formed, and the pipe joints are arranged on the heat-conducting oil pipeline at equal intervals; the pipe joint is internally fixed with a cross rod perpendicular to the axis, a vertical rod coincident with the axis is fixed on the cross rod, a choke block is arranged on the vertical rod in a penetrating way and can axially slide along the vertical rod, the choke block is conical, the small end of the choke block faces the upstream direction of the heat conduction oil pipe, the pipe diameter of the pipe joint at the choke block is enlarged, the overflow area at the choke block is identical to that of the rest parts of the pipeline, a first spring is arranged between the large end of the choke block and the cross rod, a liquid pipe is arranged on the side wall of the pipe joint in a screwed way, one end of the liquid pipe extends into the pipe joint, one end of the liquid pipe extends out of the pipe joint, two ends of the liquid pipe are respectively provided with a plunger, hydraulic oil is arranged between the two plungers, an alarm is arranged outside the pipe joint, a switch is arranged at the outer end of the liquid pipe, a second spring is arranged between the plunger at the outer end of the liquid pipe and the end of the liquid pipe, and the plunger at the inner end of the liquid pipe extends out of the liquid pipe and contacts with the large end of the choke block.
The flow blocking block is internally provided with a plurality of inclined channels, one end of each channel is positioned on the side wall of the flow blocking block, and the other end of each channel is positioned on the large end of the flow blocking block.
The outer side middle part of the U-shaped joint is provided with an inclined tube, the inner end of the inclined tube is communicated with the inside of the U-shaped tube, the tube opening of the end of the inclined tube faces to the downstream direction, and the outer end of the inclined tube is provided with an end cover in a screwed manner.
The inclined tube is internally provided with a rotating shaft, one end of the rotating shaft extends into the U-shaped tube, the end of the rotating shaft is provided with a hydraulic blade, and the rotating shaft is provided with a helical blade.
An arc-shaped baffle is arranged on the upstream side of the inner port of the inclined tube, and a gap is reserved between the baffle and the downstream side of the orifice of the inclined tube.
The pipe body is connected with the pipe joint and the U-shaped joint through flanges.
The two end faces of each pipe body are provided with annular grooves, the cross sections of the annular grooves are V-shaped, sealing rings with the cross sections of V-shaped are arranged in the annular grooves, annular protrusions matched with the annular grooves are arranged at the two ends of each pipe joint and the two ends of each U-shaped joint, and after the annular protrusions are inserted into the annular grooves, the flange bolts are screwed to enable the sealing rings to be pressed to form effective sealing.
The invention can slow down the flow velocity of the inner layer and speed up the flow velocity of the outer layer in the pipeline, on one hand, the carbon deposition forming speed of the inner wall of the pipeline can be slowed down, on the other hand, the heat exchange efficiency of the heat conduction oil pipe can be effectively improved, and in addition, the oil sludge deposited at the bent pipe can be automatically collected and is convenient to clean.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a front cross-sectional view of the present invention.
Fig. 3 is a front cross-sectional view of a pipe joint.
Fig. 4 is a perspective view of a pipe joint.
Fig. 5 is a front cross-sectional view of a U-joint.
Fig. 6 is an enlarged view of the position a in fig. 2.
Fig. 7 is an enlarged view of the position B in fig. 3.
Detailed Description
Embodiments of the present invention are further described below with reference to FIGS. 1-7.
The invention comprises a plurality of pipe joints 1, a plurality of sections of pipe bodies 2 and a plurality of U-shaped joints 3, wherein the pipe joints 1 are short pipes, the pipe bodies 2 are long pipes, the pipe joints 1 and the pipe bodies 2 are alternately arranged and connected along the axis, the U-shaped joints 3 are arranged at the steering position of a pipeline, so that a heat-conducting oil pipe in S-shaped arrangement is formed, and the pipe joints 1 are equidistantly arranged on the heat-conducting oil pipe; the pipe joint 1 is internally fixed with a cross rod 4 vertical to the axis, the cross rod 4 is fixedly provided with a vertical rod 5 coincident with the axis, the vertical rod 5 is penetrated with a choke block 6, the choke block 6 can axially slide along the vertical rod 5, the small end of the choke block 6 faces the upstream direction of the heat conduction oil pipe, the pipe diameter of the pipe joint 1 at the choke block 6 is enlarged, the flow area at the choke block 6 is the same as the flow area of the rest part of the pipeline, a first spring 7 is arranged between the large end of the choke block 6 and the cross rod 4, the side wall of the pipe joint 1 is provided with a liquid pipe 8 in a screwed manner, one end of the liquid pipe 8 extends into the pipe joint 1, one end extends out of the pipe joint 1, two ends of the liquid pipe 8 are respectively provided with a plunger 9, hydraulic oil is arranged between the two plungers 9, an alarm 10 is arranged outside the pipe joint 1, a switch 11 of the alarm 10 is arranged at the outer end of the liquid pipe 8, a second spring 12 is arranged between the plunger 9 at the outer end of the liquid pipe 8 and the end of the liquid pipe 8, and the plunger 8 is in contact with the plunger 8 at the large end of the liquid pipe 8.
A plurality of inclined channels 13 are formed in the choke block 6, one end of each channel 13 is located on the side wall of the choke block 6, the other end of each channel 13 is located on the large end of the choke block 6, when heat conduction oil flows through the choke block 6, part of the heat conduction oil flows to the large end of the choke block 6 through the channels 13, and cavitation vortex formed by the large end of the choke block 6 is reduced, so that pressure loss caused by the cavitation vortex is reduced.
The middle part of the outer side of the U-shaped joint 3 is provided with an inclined tube 14, the inner end of the inclined tube 14 is communicated with the inside of the U-shaped tube, the mouth of the end tube of the inclined tube 14 faces to the downstream direction, the outer end of the inclined tube 14 is provided with an end cover 15 in a screwed manner, and the oil sludge deposited in the U-shaped tube can slide into the inclined tube 14.
The inclined tube 14 is internally provided with a rotating shaft 16, one end of the rotating shaft 16 extends into the U-shaped tube, the end of the rotating shaft 16 is provided with a hydraulic blade 17, the rotating shaft 16 is provided with a spiral blade 18, and when the rotating shaft 16 rotates, the spiral blade 18 can push the oil sludge to the outer end of the inclined tube 14.
An arc-shaped baffle 19 is arranged on the upstream side of the inner port of the inclined tube 14, a gap is reserved between the baffle 19 and the downstream side of the orifice of the inclined tube 14, and when heat conduction oil flows through the baffle 19, a flushing blind area is formed on the downstream side of the orifice of the inclined tube 14, as shown in a position C in fig. 2, so that oil sludge is deposited in the blind area and slides into the inclined tube 14.
The pipe body 2 is connected with the pipe joint 1 and the U-shaped joint 3 through flanges.
The two end faces of each section of pipe body 2 are provided with annular grooves 20, the cross section of each annular groove 20 is of a V shape, each annular groove 20 is internally provided with a sealing ring 21 with the cross section of the V shape, the two ends of each pipe joint 1 and the two ends of each U-shaped joint 3 are respectively provided with an annular bulge 22 matched with each annular groove 20, and after the annular bulge 22 is inserted into each annular groove 20, the sealing rings 21 are pressed by tightening flange bolts to form effective sealing.
When the heat conducting oil flows in the common oil pipe, the flow speed of the heat conducting oil at the outer side close to the inner wall of the pipeline is slower due to the friction resistance of the pipeline, and the flow speed is faster due to no resistance at the axis, while the flow speed is slower due to the fact that the flow resistance of the fluid at the axis is generated by the flow resistance blocks 6 at intervals at the axis of the oil pipe, the flow speed is slower due to the fact that the flow area of each part of the pipeline is the same, and the flow speed at the axis is slower under the condition that the total flow is unchanged, the flow speed at the inner wall is always faster, so that the flow speed difference at the axis and the inner wall is balanced to a great extent; the flow speed of the heat conducting oil at the inner wall is increased, so that carbon deposition is less likely to be deposited on the inner wall of the heat conducting oil pipe, thereby greatly slowing down the formation speed of the carbon deposition on the inner wall of the oil pipe and prolonging the effective working time of the heat conducting oil pipe; on the other hand, the flow velocity at the axis is reduced, the flow velocity at the inner wall is accelerated, the flow of the outer layer is increased, and the flow of the inner layer is reduced, so that more heat conduction oil directly participates in heat exchange with the pipe wall, and the heat efficiency of the heat conduction oil pipe is effectively improved.
The oil sludge deposited at the U-shaped joint 3 slides into the inclined tube 14 from a flushing blind area at the downstream side of the orifice of the inclined tube 14, and the heat conduction oil pushes the spiral blade 18 to rotate through the second hydraulic blade 17, so that the oil sludge in the inclined tube 14 is pushed to the outer end of the inclined tube 14, and the end cover 15 at the outer end of the inclined tube 14 is periodically opened for cleaning.
When carbon deposition on the inner wall of one section of pipe body 2 in front of a certain pipe section 1 is more, the overflow area at the position is reduced, the flow speed can be accelerated, the impact force of heat conduction oil on a flow blocking block 6 in the pipe section 1 is increased, therefore, the flow blocking block 6 can compress a first spring 7 to move towards the large end, the flow blocking block 6 moves to push a plunger 9 at the inner end of a liquid pipe 8, the plunger 9 at the inner end pushes the plunger 9 at the outer end of the liquid pipe 8 through hydraulic oil, the plunger 9 at the outer end compresses a second spring 12 and approaches a switch 11 of an alarm 10, and when the plunger 9 presses the switch 11, the alarm 10 alarms to remind the cleaning of the section of pipe body 2 and joints.
According to the invention, the flow blocking blocks 6 are equidistantly arranged at the axis of the pipeline, so that the resistance at the axis of the pipeline is increased, the flow velocity of the inner layer of the pipeline is reduced, the flow velocity of the outer layer is increased, on one hand, the carbon deposition forming speed of the inner wall of the pipeline can be reduced, on the other hand, the flow of the outer layer is increased, more heat conduction oil is directly subjected to heat exchange with the inner wall of the pipeline, the single-pass heat exchange amount of the heat conduction oil is effectively improved, and the heat exchange efficiency of the heat conduction oil pipe is effectively improved; in addition, set up the inclined tube 14 rationally in U type joint 3 department and form the scouring blind area through curved baffle 19, make the fatlute of U type joint 3 department concentrate and collect in inclined tube 14, avoid the pipeline to form local jam in the corner, and be convenient for clear up the fatlute of collecting.
Claims (6)
1. The utility model provides a high efficiency boiler heat conduction oil pipe way which characterized in that includes a plurality of tube coupling (1), multistage pipe shaft (2) and a plurality of U type joint (3), and tube coupling (1) are the nozzle stub, and pipe shaft (2) are the long tube, and tube coupling (1) are arranged and are connected with tube shaft (2) along the axis is in turn, and U type joint (3) are installed in pipeline steering department to form the heat conduction oil pipe that is S-shaped and arrange, and tube coupling (1) are equidistant on heat conduction oil pipe; the pipe joint (1) is internally fixed with a cross rod (4) vertical to the axis, the cross rod (4) is fixedly provided with a vertical rod (5) which coincides with the axis, the vertical rod (5) is penetrated with a flow blocking block (6), the flow blocking block (6) can axially slide along the vertical rod (5), the flow blocking block (6) is conical and the small end faces the upstream direction of a heat conducting oil pipe, the pipe diameter of the pipe joint (1) at the flow blocking block (6) is enlarged, the overflow area at the flow blocking block (6) is the same as the overflow area of the rest parts of the pipeline, a first spring (7) is arranged between the large end of the flow blocking block (6) and the cross rod (4), the side wall of the pipe joint (1) is provided with a liquid pipe (8) through threads in a rotating mode, one end of the liquid pipe (8) extends into the pipe joint (1), two ends of the liquid pipe (8) are respectively provided with a plunger (9), hydraulic oil is arranged between the two plungers (9), the pipe joint (1) is provided with an alarm (10), the alarm (10) is arranged outside the pipe joint (1), the end of the liquid pipe (8) is provided with a second end (12) of the liquid pipe (8), a plunger (9) at the inner end of the liquid pipe (8) extends out of the liquid pipe (8) and is contacted with the large end of the choke block (6); a plurality of inclined channels (13) are formed in the choke block (6), one end of each channel (13) is located on the side wall of the choke block (6), and the other end of each channel is located at the large end of the choke block (6).
2. The high-efficiency boiler heat-conducting oil pipeline according to claim 1, wherein an inclined tube (14) is arranged in the middle of the outer side of the U-shaped joint (3), the inner end of the inclined tube (14) is communicated with the inside of the U-shaped tube, the pipe orifice of the inner end of the inclined tube (14) faces to the downstream direction, and an end cover (15) is arranged at the outer end of the inclined tube (14) in a screwed mode.
3. A high efficiency boiler heat conductive oil pipe according to claim 2, characterized in that the inclined pipe (14) is provided with a rotating shaft (16), one end of the rotating shaft (16) extends into the U-shaped pipe and is provided with a hydraulic blade (17), and the rotating shaft (16) is provided with a helical blade (18).
4. A high efficiency boiler heat transfer oil pipe according to claim 2, characterized in that an arc-shaped baffle plate (19) is mounted on the upstream side of the inner port of the inclined tube (14), and the baffle plate (19) is spaced from the downstream side of the orifice of the inclined tube (14).
5. The high-efficiency boiler heat-conducting oil pipeline according to claim 1, wherein the pipe body (2) is connected with the pipe joint (1) and the U-shaped joint (3) through flanges.
6. The high-efficiency boiler heat-conducting oil pipeline according to claim 1, wherein an annular groove (20) is formed in two end faces of each section of the pipe body (2), the cross section of the annular groove (20) is of a V shape, a sealing ring (21) with the cross section of the V shape is arranged in the annular groove (20), and annular protrusions (22) matched with the annular groove (20) are arranged at two ends of the pipe joint (1) and two ends of the U-shaped joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110719282.0A CN113418300B (en) | 2021-06-28 | 2021-06-28 | High efficiency boiler heat conduction oil pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110719282.0A CN113418300B (en) | 2021-06-28 | 2021-06-28 | High efficiency boiler heat conduction oil pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418300A CN113418300A (en) | 2021-09-21 |
| CN113418300B true CN113418300B (en) | 2023-12-05 |
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ID=77716941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110719282.0A Active CN113418300B (en) | 2021-06-28 | 2021-06-28 | High efficiency boiler heat conduction oil pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418300B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340000B (en) * | 2021-06-28 | 2022-06-14 | 栾东存 | Organic heat carrier boiler heat conduction oil pipe capable of reducing carbon deposition |
| CN114130078B (en) * | 2021-11-29 | 2022-11-18 | 保定味美康食品配料有限公司 | Device and production process for hydrolyzing vegetable protein seasoning liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10252715A (en) * | 1997-03-17 | 1998-09-22 | Shunan Chiiki Jiba Sangyo Shinko Center | Fluid transporting pipe and fluid transporting method reducing fluid resistance |
| CN202915560U (en) * | 2011-07-25 | 2013-05-01 | 杨泰和 | Closed path type temperature uniformizing device |
| CN207153245U (en) * | 2017-06-28 | 2018-03-30 | 长沙瑞泽能源科技股份有限公司 | A kind of pipeline foreign matter removing device |
| CN209445594U (en) * | 2019-01-08 | 2019-09-27 | 南通恒润新材料科技有限公司 | A kind of finish heat cycles device |
| CN111322776A (en) * | 2020-01-03 | 2020-06-23 | 天津大学 | Coaxial combined sleeve type heat exchanger |
| CN112411728A (en) * | 2020-11-26 | 2021-02-26 | 杨辉云 | Sewage pipeline junction inner wall cleaning device with environmental protection function |
| CN113340000A (en) * | 2021-06-28 | 2021-09-03 | 栾东存 | Organic heat carrier boiler heat conduction oil pipe capable of reducing carbon deposition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10213816B2 (en) * | 2015-04-21 | 2019-02-26 | Tdw Delaware, Inc. | Pipeline pig with hydraulically balanced collapsible sealing elements |
-
2021
- 2021-06-28 CN CN202110719282.0A patent/CN113418300B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10252715A (en) * | 1997-03-17 | 1998-09-22 | Shunan Chiiki Jiba Sangyo Shinko Center | Fluid transporting pipe and fluid transporting method reducing fluid resistance |
| CN202915560U (en) * | 2011-07-25 | 2013-05-01 | 杨泰和 | Closed path type temperature uniformizing device |
| CN207153245U (en) * | 2017-06-28 | 2018-03-30 | 长沙瑞泽能源科技股份有限公司 | A kind of pipeline foreign matter removing device |
| CN209445594U (en) * | 2019-01-08 | 2019-09-27 | 南通恒润新材料科技有限公司 | A kind of finish heat cycles device |
| CN111322776A (en) * | 2020-01-03 | 2020-06-23 | 天津大学 | Coaxial combined sleeve type heat exchanger |
| CN112411728A (en) * | 2020-11-26 | 2021-02-26 | 杨辉云 | Sewage pipeline junction inner wall cleaning device with environmental protection function |
| CN113340000A (en) * | 2021-06-28 | 2021-09-03 | 栾东存 | Organic heat carrier boiler heat conduction oil pipe capable of reducing carbon deposition |
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| Publication number | Publication date |
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| CN113418300A (en) | 2021-09-21 |
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Effective date of registration: 20231030 Address after: 438300 No.8 Tingzhou Avenue, Macheng Economic Development Zone, Huanggang City, Hubei Province Applicant after: Hubei Xicheng Food Technology Co.,Ltd. Address before: 450000 No.70, Jingnan 1st Road, Zhengzhou Economic and Technological Development Zone, Henan Province Applicant before: Luan Dongcun |
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