CN220300654U - Z-type water distribution system for coke oven raw gas sensible heat recovery - Google Patents
Z-type water distribution system for coke oven raw gas sensible heat recovery Download PDFInfo
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- CN220300654U CN220300654U CN202321896335.7U CN202321896335U CN220300654U CN 220300654 U CN220300654 U CN 220300654U CN 202321896335 U CN202321896335 U CN 202321896335U CN 220300654 U CN220300654 U CN 220300654U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 282
- 238000009826 distribution Methods 0.000 title claims abstract description 92
- 239000000571 coke Substances 0.000 title claims abstract description 31
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 230000000630 rising effect Effects 0.000 claims description 46
- 239000007789 gas Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 12
- 230000001174 ascending effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000005514 two-phase flow Effects 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Coke Industry (AREA)
Abstract
The utility model discloses a Z-type water distribution system for coke oven raw gas sensible heat recovery, and belongs to the field of coke oven raw gas recovery. The system comprises a water delivery module, a primary water distribution pipe, a riser heat exchanger, a water inlet pipe of the riser heat exchanger, a water outlet pipe of the riser heat exchanger, a water return main pipe, a water return reducing joint and a water distribution reducing joint; the water inlet of the primary water distribution pipe is connected with the water outlet of the water delivery module, and the water outlet of the primary water distribution pipe is connected with the water inlets of a plurality of groups of riser heat exchangers through the water inlet pipe of the riser heat exchangers; the pipe diameter of the primary water distribution pipe is graded and gradually reduced along the flowing direction of the medium; the water distribution reducing joints are arranged at the grading positions of the primary water distribution pipes, so that the water flow rate of the primary water distribution pipes is constant; the water outlets of the water outlet pipes of the riser heat exchangers of the plurality of groups of riser heat exchangers are connected with the water inlet of the water return main pipe, and the pipe diameter of the water return main pipe is graded and gradually increased along the medium flow direction; and the plurality of return water reducing joints are arranged at the grading position of the return water main pipe.
Description
Technical Field
The utility model belongs to the field of coke oven raw gas recovery, and relates to a Z-type water distribution system for coke oven raw gas sensible heat recovery.
Background
In the coking process of the coking plant, the heat carried out by the raw gas accounts for more than 30% of the total heat of the coke oven. Because the raw gas output is high, the temperature of the raw gas at the outlet of the rising pipe is high, the waste of high-grade heat energy is serious, the energy consumption can be reduced by recycling the heat, the ammonia water circulation amount and the carbon dioxide emission are saved, and the energy-saving and emission-reducing potential is very great.
The existing raw gas sensible heat recovery technology is to install a rising pipe heat exchanger at the rising pipe position to recover the sensible heat of the raw gas. Deoxygenated water from the deoxygenator of the system is supplied into a steam drum through a water supply pump, and the steam drum supplies water to a coke oven riser heat exchange device through a forced circulation pump. The high-temperature raw gas generated in the coking production process of the coke oven is transferred to a heat exchanger through the inner wall of a riser heat exchange device, and a steam-water mixture generated by heat absorption and heat exchange of the heat exchanger is led to a steam drum through a steam-water connection pipeline to carry out steam-water separation; the separated steam is output from the steam pipeline, and the rest water enters the system for recycling in the steam drum.
Because of the particularity of the coke oven, taking a 1-seat 65-hole coke oven as an example, the total distance from one ascending pipe to the tail end ascending pipe of a single seat Jiao Ludi is about 90 meters, and because of large resistance of a pipeline of a circulation loop, the resistance, water inflow, flow velocity and the like of the first ascending pipe and the tail end ascending pipe are greatly different, and the tail end ascending pipe possibly has circulation stagnation caused by insufficient water inflow and water inflow power, and bulges, pipe burst and the like.
In addition, in the prior art, a single u-shaped or Z-shaped water distribution mode exists in the waste heat recovery water distribution mode of the riser, and the inlet and the outlet are consistent, so that the water flow is unbalanced.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a Z-shaped water distribution system for coke oven raw gas sensible heat recovery, which solves the problem of unbalanced water flow caused by a single u-shaped or Z-shaped water distribution mode with consistent inlet and outlet.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model provides a Z-type water distribution system for coke oven raw gas sensible heat recovery, which comprises a water delivery module, a primary water distribution pipe, a rising pipe heat exchanger, a water inlet pipe of the rising pipe heat exchanger, a water outlet pipe of the rising pipe heat exchanger, a water return main pipe, a water return reducing joint and a water distribution reducing joint;
the water inlet of the primary water distribution pipe is connected with the water outlet of the water delivery module, and the water outlet of the primary water distribution pipe is connected with the water inlets of a plurality of groups of riser heat exchangers through the water inlet pipe of the riser heat exchangers; the pipe diameter of the primary water distribution pipe is graded and gradually reduced along the medium flow direction; the water distribution reducing joints are arranged at the grading positions of the primary water distribution pipes;
the water outlets of the plurality of groups of rising pipe heat exchangers are connected with the water inlet of the water return main pipe through the water outlet pipe of the rising pipe heat exchangers, and the pipe diameter of the water return main pipe is graded and gradually increased along the flow direction of the medium; and the plurality of return water reducing joints are arranged at the grading position of the return water main pipe.
In the specific implementation process, the water delivery module comprises a drum downcomer, a forced circulation pump and a water supply main pipe;
the water outlet of the steam drum descending pipe is connected with the water inlet of the water supply main pipe, and a forced circulation pump is arranged on a pipeline between the steam drum descending pipe and the water supply main pipe.
In the specific implementation process, the water outlet of the drum downcomer is connected with water inlets of a first branch and a second branch, a group of forced circulation pumps are respectively arranged on the first branch and the second branch, and the water outlets of the first branch and the second branch are connected with the water inlets of the water supply main pipe.
In the specific implementation process, the water inlet pipe of the rising pipe heat exchanger connected with the primary water distribution pipes with the same pipe diameter is a water inlet pipe group.
In the specific implementation process, a throttle valve and a remote pressure gauge are arranged on the water inlet pipe of the rising pipe heat exchanger at the beginning end and the tail end of the water inlet pipe group.
In the specific implementation process, the backwater reducing joints are in one-to-one correspondence with the water distribution reducing joints.
In the specific implementation process, the pipe diameter of the water return main pipe is larger than that of the primary water distribution pipe.
In the specific implementation process, the water outlet of the water return main pipe is connected with the inlet of the steam drum.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a Z-type water distribution system for coke oven raw gas sensible heat recovery, which adopts a primary water distribution pipe, only removes a secondary water distribution pipe, and saves project investment; the pipe diameter of the primary water distribution pipe is graded and reduced step by step along the flow direction of the medium, the pipe diameter of the water return main pipe is graded and increased step by step along the flow direction of the medium, and a reducing joint is arranged at the graded position, so that the water flow rate can be effectively controlled to be basically constant through a Z-shaped step-by-step reducing water distribution mode, and the water flow unbalance is prevented.
Further, the primary water distribution pipeline with the large pipe diameter of the water return main pipe ensures that the pressure difference between the inlet and the outlet of the rising pipe is relatively stable.
Drawings
Fig. 1 is a schematic structural diagram of a Z-type water distribution system for coke oven raw gas sensible heat recovery.
Wherein: 1-a drum downcomer; 2-a forced circulation pump; 3-a water supply main pipe; 4-a first-stage water distribution pipe; 5-riser heat exchanger; 6-a water inlet pipe of the riser heat exchanger; 7-a throttle valve; 8-remote pressure gauge; 9-a water outlet pipe of the riser heat exchanger; 10-a backwater main pipe; 11-backwater reducing joint 12-water distribution reducing joint.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model is described in further detail below with reference to the attached drawing figures:
the utility model provides a Z-type water distribution system for recycling waste heat of raw coke oven gas, which has a steam-water flow as shown in figure 1, and comprises the following components: the device comprises a steam drum, a forced circulation pump 2, a riser heat exchanger 5 and a steam drum; circulating water is led to the tail end of the coke oven through a water delivery module, namely from a drum downcomer 1 to a forced circulation pump 2 by the power of the forced circulation pump 2 through a water supply header pipe 3 and then enters a water inlet of a primary water distribution pipe 4, and the system is provided with two forced circulation pumps 2 for one preparation; the primary water distribution pipe 4 is paved at the position of the whole coke oven riser heat exchanger 5, water is distributed to a riser heat exchanger water inlet pipe 6 of the riser heat exchanger 5 by the primary water distribution pipe 4 and enters the riser heat exchanger 5, namely, the water outlet of the primary water distribution pipe 4 is connected with water inlets of a plurality of groups of riser heat exchangers 5 through the riser heat exchanger water inlet pipe 6; because water is spread from the farthest end to the water inlet pipe 6 of the rising pipe heat exchanger at the nearest section, the water flow rate in the primary water distribution pipe 4 is gradually reduced along with the extension of the pipeline, a plurality of water distribution reducing joints 12 are arranged, the pipe diameters are graded and gradually reduced along the medium flow direction, and the water distribution reducing joints 12 are arranged at the grading position of the primary water distribution pipe 4, so that the water flow rate in the primary water distribution pipe 4 is basically constant.
The water is absorbed after entering the rising pipe heat exchanger 5 from the rising pipe heat exchanger water inlet pipe 6, and enters the backwater main pipe 10 in parallel through the rising pipe heat exchanger water outlet pipe 9 of the rising pipe heat exchanger 5 after being changed into a steam-water mixture, namely, the water outlets of the rising pipe heat exchanger water outlet pipes 9 of the rising pipe heat exchangers 5 of a plurality of groups are all connected with the water inlet of the backwater main pipe 10 to prevent the phenomena of layering, vibration, impact, abnormal sound and the like of the steam-liquid two-phase flow in the pipes, the flow speed of the medium needs to be stabilized in a reasonable range, a plurality of backwater reducing joints 11 are arranged at the positions, corresponding to the primary water distribution pipes 4, of the backwater main pipe 10, the pipe diameters are graded and gradually increased along the flow direction of the medium, the flow speed of the backwater main pipe 10 is ensured to be constant within a design value range, and the backwater reducing joints 11 are positioned at the grading positions of the backwater main pipe 10.
Specifically, the Z-shaped water distribution system for recycling the waste heat of the raw coke oven gas, namely the rising pipe waste heat utilization circulating system is as follows: the water delivery module comprises a drum downcomer 1, a forced circulation pump 2 and a water supply main pipe 3; the water outlet of the drum descending pipe 1 is connected with the water inlet of the water supply main pipe 3, and a forced circulation pump 2 is arranged on a pipeline between the drum descending pipe 1 and the water supply main pipe 3; the water outlet of the drum downcomer 1 is connected with water inlets of a first branch and a second branch, a group of forced circulation pumps 2 are respectively arranged on the first branch and the second branch, the water outlets of the first branch and the second branch are connected with the water inlet of the water supply main pipe 3, and the water inlet of the primary water distribution pipe 4 is connected with the water outlet of the water delivery module.
Specifically, circulating water is led to the tail end of the coke oven through a water supply main pipe 3 under the power of a forced circulation pump 2 from a drum downcomer 1 to the forced circulation pump 2 and then enters a first-stage water distribution pipe 4, and the system is provided with two forced circulation pumps 2 for one preparation; the primary water distribution pipe 4 is paved to the position of the initial rising pipe heat exchanger 5 along the tail end of the coke oven, water is shunted to the plurality of rising pipe heat exchanger water inlet pipes 6 from the primary water distribution pipe 4, and the water flow rate in the primary water distribution pipe 4 is gradually reduced as the water sequentially enters the rising pipe heat exchanger water inlet pipes 6 from the tail end to the initial end of the coke oven, so that the primary water distribution pipe 4 is provided with the plurality of water distribution reducing joints 12 step by step, and the water flow rate in the primary water distribution pipe 4 is ensured to be basically constant.
Providing a water inlet pipe group of the rising pipe heat exchanger, wherein the water inlet pipe 6 of the rising pipe heat exchanger is connected with the primary water distribution pipe 4 with the same pipe diameter, and arranging a throttle valve 7 and a remote pressure gauge 8 on the water inlet pipe 6 of the rising pipe heat exchanger of two rising pipes at the beginning end and the tail end of each rising pipe group in order to ensure that the water flow rate of the water inlet pipe 6 of each rising pipe heat exchanger is basically equal; a remote pressure gauge 8 is arranged after the throttle valve 7; in order to save investment cost, a group of throttle valves 7 and a remote pressure gauge 8 are respectively arranged at the water inlet pipe 6 of the rising pipe heat exchanger at the beginning and the end of the different pipe diameters of the primary water distribution pipe, and the rising pipe heat exchanger 5 has the same structure, so that the resistances (inlet-outlet pressure differences) are the same when the water flows are the same; when in debugging operation, only the throttle valve 7 on the water inlet pipe 6 of the rising pipe heat exchanger is regulated until the inlet and outlet pressure differences of each group (the water inlet pipe 6 of the rising pipe heat exchanger connected with the same pipe diameter is one group) are consistent, so that the water inflow in each rising pipe heat exchanger 5 is basically consistent, and the purpose of uniform water distribution is achieved.
The water is absorbed after entering the rising pipe heat exchanger 5 from the rising pipe heat exchanger water inlet pipe 6, and then enters the backwater main pipe 10 in parallel through the rising pipe heat exchanger water outlet pipe 9 after being changed into a vapor-liquid mixture, in order to prevent the vapor-liquid two-phase flow from generating layering, vibration, impact, abnormal sound and other phenomena in the pipe, the flow speed of the medium needs to be stabilized in a reasonable range, so the backwater reducing joint 11 is arranged at the position on the backwater main pipe 10 corresponding to the first-stage water distribution pipe 4, the pipe diameter of the pipeline gradually increases along the flow direction of the medium, the flow speed of each section of the pipeline is ensured to be stabilized in a reasonable range, and the phenomena of layering, vibration, impact, abnormal sound and the like caused by the too low or too high flow speed of the vapor-liquid two-phase flow in the pipe are prevented.
In order to ensure that the stable vapor-liquid two-phase flow is formed by the water return header pipe 10 which is generally one level larger than the pipe diameter of the primary water distribution pipe 4, if the pipe diameter of the primary water distribution pipe 4 is DN125, the pipe diameter of the water return header pipe 10 at the outlet of the corresponding rising pipe is DN150. The final vapor-liquid two-phase flow is subjected to a vapor-liquid separator by a medium popular steam drum of a water return header pipe 10.
Examples
The water outlet of the drum descending pipe 1 is connected with the water inlet of the water supply main pipe 3, a forced circulation pump 2 is arranged on a pipeline between the drum descending pipe 1 and the water supply main pipe 3, the water inlet of the primary water distribution pipe 4 is connected with the water outlet of the water supply main pipe 3, and the water outlet of the primary water distribution pipe 4 is connected with the water inlets of 72 groups of rising pipe heat exchangers 5 through the water inlet pipe 6 of the rising pipe heat exchanger; the pipe diameter of the first-stage water distribution pipe 4 is divided into two stages along the medium flowing direction and is reduced step by step; the two water distribution reducing joints 12 are arranged at the grading positions of the primary water distribution pipes 4, so that the water flow velocity of the primary water distribution pipes 4 is constant;
the water outlets of the water outlet pipes 9 of the ascending pipe heat exchangers of the 72 groups of ascending pipe heat exchangers 5 are connected with the water inlet of the water return main pipe 10, and the pipe diameter of the water return main pipe 10 is divided into two stages and gradually increased along the medium flow direction; two return water reducing joints 11 are at the stage of the return water main pipe 10.
The utility model provides a Z-type water distribution system for coke oven raw gas sensible heat recovery, which adopts a primary water distribution pipe and a Z-type water distribution mode, only removes a secondary water distribution pipe, and saves project investment; the pipe diameter of the primary water distribution pipe is graded and reduced step by step along the flow direction of the medium, the pipe diameter of the water return main pipe is graded and increased step by step along the flow direction of the medium, and a reducing joint is arranged at the graded position, so that the water flow rate can be effectively controlled to be basically constant through a Z-shaped step-by-step reducing water distribution mode, and the water flow unbalance is prevented.
The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.
Claims (8)
1. The Z-type water distribution system for coke oven raw gas sensible heat recovery is characterized by comprising a water delivery module, a primary water distribution pipe (4), a rising pipe heat exchanger (5), a rising pipe heat exchanger water inlet pipe (6), a rising pipe heat exchanger water outlet pipe (9), a water return main pipe (10), a water return reducing joint (11) and a water distribution reducing joint (12);
the water inlet of the primary water distribution pipe (4) is connected with the water outlet of the water delivery module, and the water outlet of the primary water distribution pipe (4) is connected with the water inlets of a plurality of groups of riser heat exchangers (5) through the water inlet pipe (6) of the riser heat exchangers; the pipe diameter of the primary water distribution pipe (4) is graded and gradually reduced along the medium flow direction; the water distribution reducing joints (12) are arranged at the grading positions of the primary water distribution pipes (4);
the water outlets of the plurality of groups of rising pipe heat exchangers (5) are connected with the water inlet of the water return main pipe (10) through the water outlet pipe (9) of the rising pipe heat exchangers, and the pipe diameter of the water return main pipe (10) is increased step by step along the medium flowing direction; the water return reducing joints (11) are arranged at the grading positions of the water return header pipes (10).
2. The Z-type water distribution system for coke oven raw gas sensible heat recovery according to claim 1, wherein the water delivery module comprises a drum downcomer (1), a forced circulation pump (2) and a water supply header pipe (3);
the water outlet of the drum descending pipe (1) is connected with the water inlet of the water supply main pipe (3), and a forced circulation pump (2) is arranged on a pipeline between the drum descending pipe (1) and the water supply main pipe (3).
3. The Z-shaped water distribution system for coke oven raw gas sensible heat recovery according to claim 2, wherein the water outlet of the drum downcomer (1) is connected with water inlets of a first branch and a second branch, a group of forced circulation pumps (2) are respectively arranged on the first branch and the second branch, and the water outlets of the first branch and the second branch are connected with the water inlets of the water supply header pipe (3).
4. The Z-type water distribution system for coke oven raw gas sensible heat recovery according to claim 1, wherein the rising pipe heat exchanger water inlet pipe (6) connected with the primary water distribution pipes (4) with the same pipe diameter is a water inlet pipe group.
5. The Z-type water distribution system for coke oven raw gas sensible heat recovery according to claim 4, wherein a throttle valve (7) and a remote pressure gauge (8) are arranged on a water inlet pipe (6) of a rising pipe heat exchanger at the beginning and the end of the water inlet pipe group.
6. The Z-shaped water distribution system for coke oven raw gas sensible heat recovery according to claim 1, wherein the backwater reducing joints (11) are in one-to-one correspondence with the positions of the water distribution reducing joints (12).
7. The Z-shaped water distribution system for coke oven raw gas sensible heat recovery according to claim 1, wherein the pipe diameter of the water return main pipe (10) is larger than the pipe diameter of the primary water distribution pipe (4).
8. The Z-shaped water distribution system for coke oven raw gas sensible heat recovery according to claim 1, wherein a water outlet of the water return main pipe (10) is connected with an inlet of a steam drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896335.7U CN220300654U (en) | 2023-07-18 | 2023-07-18 | Z-type water distribution system for coke oven raw gas sensible heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896335.7U CN220300654U (en) | 2023-07-18 | 2023-07-18 | Z-type water distribution system for coke oven raw gas sensible heat recovery |
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| Publication Number | Publication Date |
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| CN220300654U true CN220300654U (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321896335.7U Active CN220300654U (en) | 2023-07-18 | 2023-07-18 | Z-type water distribution system for coke oven raw gas sensible heat recovery |
Country Status (1)
| Country | Link |
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| CN (1) | CN220300654U (en) |
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2023
- 2023-07-18 CN CN202321896335.7U patent/CN220300654U/en active Active
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