CN219532361U - Safe and reliable anti-blocking guide module - Google Patents
Safe and reliable anti-blocking guide module Download PDFInfo
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- CN219532361U CN219532361U CN202320746341.8U CN202320746341U CN219532361U CN 219532361 U CN219532361 U CN 219532361U CN 202320746341 U CN202320746341 U CN 202320746341U CN 219532361 U CN219532361 U CN 219532361U
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- compressed air
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- 239000011521 glass Substances 0.000 claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 31
- 239000007787 solid Substances 0.000 abstract description 31
- 238000004140 cleaning Methods 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 31
- 238000007667 floating Methods 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- 238000007664 blowing Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The safe and reliable anti-blocking pressure guiding module comprises a pressure taking pipe, wherein the pressure taking pipe is connected with a pressure guiding pipe and at least two collectors through a communicating piece, the pressure guiding pipe and the collectors are connected in parallel, a pressure taking valve is arranged between the pressure guiding pipe and the communicating piece, the pressure guiding pipe is connected with a measuring instrument and a pressure guiding pipeline thereof, an inlet cut-off valve is arranged between the communicating piece and the collectors, and a sample return port cut-off valve used for being connected with a sample return port of tested equipment or a pipeline and an outlet valve used for removing polymer or sampling in the collectors are also arranged on the collectors; the collector is provided with a sight glass for observing the inside of the collector and a compressed air pipeline for discharging accumulated matters in the collector, an outlet of the compressed air pipeline is positioned in the collector, and a compressed air switch valve is arranged on a compressed air pipeline positioned outside the collector. The utility model has wide universality, can simultaneously reduce the daily cleaning difficulty and the times of tiny solid particles and condensate in the pressure guide pipeline, and has certain economic benefit.
Description
Technical Field
The utility model belongs to the technical field of instrument installation in the chemical industry, and particularly relates to a safe and reliable anti-blocking guide module.
Background
In recent years, along with the technical development of domestic chemical technology, a plurality of incineration equipment for adapting to new technology appears, the internal pressure of the incineration equipment needs to be measured at any time in the working process of the incineration equipment, tiny solid particles (such as dust and the like) are usually generated in the incineration process, the pressure of the tested equipment or a pipeline is micro-positive pressure or negative pressure, a back blowing pressure taking method and the like are not suitable, and the pressure of the tested equipment or the pipeline can be accurately measured by adopting a direct pressure guiding mode. However, when the pressure-guiding measurement is performed on the gas-phase medium containing dust in the tested equipment or the pipeline, the condition that tiny solid particles (such as dust and the like) are gathered to block the pressure-guiding pipe of the measuring instrument may occur, the accuracy of the measured data is affected, and once the pressure-guiding pipe of the measuring instrument is blocked, the dredging is troublesome, so that the difficulty of daily maintenance is increased. In addition, with the continuous development of new domestic chemical technology, the types of gas phase media possibly encountered are also continuously increased, the harmfulness of tiny solid particles (such as dust and the like) in different gas phase media is difficult to determine, and the damage to maintenance personnel is possibly caused.
In addition, when measuring the pressure of the positive pressure gas phase medium containing tiny solid particles or having high humidity, the existing common practice is to adopt a back blowing method, a back blowing pressure guiding system is complex, the construction difficulty is high, compressed air is required to be continuously consumed when the system is operated, and the energy consumption is high. For example, in the prior patent CN 210165420U, devices such as a converging valve, an electromagnetic valve, a constant-current device, an instrument air tank, a pressure transmitter and the like are arranged in a hearth negative pressure timing blowback device of a pulverized coal furnace, so that the structure is complex, frequent blowback is required, and the energy consumption is high.
Disclosure of Invention
In order to solve the technical problems and achieve the aim of achieving both safety and economy, the utility model provides a safe and reliable anti-blocking pressure guiding module, which solves the problems of blocking of a pressure guiding pipe of a micro-pressure gas phase medium containing micro solid particles or condensate with less investment and engineering quantity, and complex construction and larger energy consumption when a positive pressure gas phase medium adopts a back blowing measurement method.
The aim of the utility model is realized by adopting the following technical scheme. The utility model provides a safe and reliable anti-blocking pressure guiding module, which comprises a pressure taking pipe communicated with tested equipment or a pipeline, wherein the pressure taking pipe is connected with the pressure guiding pipe and at least two collectors through a communicating piece, the pressure guiding pipes and the collectors are mutually connected in parallel, a pressure taking valve is arranged between the pressure guiding pipe and the communicating piece, the pressure guiding pipe is connected with a measuring instrument and the pressure guiding pipeline thereof, an inlet cut-off valve is arranged between the communicating piece and the collectors, and a sample return port cut-off valve used for being connected with a sample return port of the tested equipment or the pipeline and an outlet valve used for removing accumulated matters or sampling in the collectors are also arranged on the collectors; the collector is provided with a sight glass for observing the inside of the collector and a compressed air pipeline for discharging accumulated matters in the collector, an outlet of the compressed air pipeline is positioned in the collector, and a compressed air switch valve is arranged on a compressed air pipeline positioned outside the collector.
Further, the other end of the outlet valve is provided with a drain pipe cap for sealing.
Further, the measuring instrument and the pressure guiding pipeline thereof are positioned above the communicating piece, and the collector is positioned below or obliquely below the communicating piece.
Further, the outlet of the compressed air line is located above the inside of the sight glass and is directed towards the sight glass.
Further, the pressure taking pipe is horizontally communicated with the pressure guiding port on the tested equipment or the pipeline, and the other end of the pressure taking pipe is horizontally communicated with the communicating piece.
Compared with the prior art, the utility model has the following advantages:
the utility model can be directly added in various newly built or put into operation petrochemical devices, namely, the utility model can be installed by arranging the pressure guiding port on the existing tested equipment or pipeline, and the utility model can be simultaneously used for micro-positive pressure or negative pressure and positive pressure, thereby having wide universality; the utility model can carry out sedimentation separation on tiny solid particles or wet gas condensate in the pressure taking medium in the collector, ensure the cleanliness of the gas phase medium in the pressure guiding pipe of the subsequent measuring element, prevent the pressure guiding pipe of the measuring element from being blocked and influence the accuracy of the measuring parameters; because the collector has a certain volume, a certain amount of accumulated matters can be contained, when the tested equipment or the pipeline is provided with the sample return port, the accumulated matters of the collector are returned to the tested equipment or the pipeline through the sample return port cut-off valve, so that the daily cleaning difficulty and times of tiny solid particles and condensate in the pressure-guiding pipeline can be reduced, and meanwhile, the airtight collection and centralized treatment of the tiny solid particles (such as dust and the like) or wet gas condensate in the gas phase medium are realized through the outlet valve, so that the pollution of toxic and harmful substances to the surrounding environment and the injury to personnel are prevented; compared with the existing back-blowing pressure guiding system, the anti-blocking pressure guiding module does not need to continuously inject compressed air, so that the installation difficulty and the energy consumption are reduced; the utility model has certain economic benefit, can reduce the running loss of the measuring element and the pressure guiding pipeline thereof, saves energy, reduces the operation difficulty and the times of daily maintenance of operators on duty, saves human resources, brings certain economic benefit to enterprises, can enhance the safety protection of the operators, reduces the labor intensity and possible dust injury for the operators, and is convenient for the enterprises to carry out safety management.
The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model, given by way of illustration only, together with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a safe and reliable anti-blocking pilot module embodiment of the present utility model.
[ reference numerals ]
1: pressure taking pipe, 2-1: first collector, 2-2: second collector, 3-1: first sight glass, 3-2: second sight glass, 4-1 first blowdown pipe cap, 4-2: second blowdown pipe cap, 5-1: pressure valve, 5-2: first inlet shutoff valve, 5-3: first sample return port shut-off valve, 5-4: first outlet valve, 5-5: second inlet shutoff valve, 5-6: second sample return port shut off valve, 5-7: second outlet valve, 6-1: a first compressed air line, 6-2 a second compressed air line, 7-1: first compressed air switching valve, 7-2: second compressed air switching valve, 8: a four-way element; 9: pressure guiding pipe, 10: measuring instrument and draw pressure line thereof, 11: measured device or pipe, 12: and a pressure guiding port.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment of the safe and reliable anti-blocking pressure guiding module comprises a pressure taking pipe 1, a first collector 2-1, a second collector 2-2, a first sight glass 3-1, a second sight glass 3-2, a first sewage pipe cap 4-1, a second sewage pipe cap 4-2, a pressure taking valve 5-1, a first inlet cut-off valve 5-2, a first sample return port cut-off valve 5-3, a first outlet valve 5-4, a second inlet cut-off valve 5-5, a second sample return port cut-off valve 5-6, a second outlet valve 5-7, a first compressed air pipeline 6-1, a second compressed air pipeline 6-2, a first compressed air switch valve 7-1, a second compressed air switch valve 7-2, a four-way element 8 and a pressure guiding pipe 9, as shown in fig. 1.
One end of the pressure taking pipe 1 is horizontally communicated with a pressure guiding port 12 on the tested equipment or pipeline 11, and the other end is horizontally communicated with the side wall of the four-way element 8. The measuring instrument and the pressure guiding pipeline 10 thereof are arranged above the four-way element 8, the pressure guiding pipe 9 connected with the measuring instrument and the pressure guiding pipeline 10 thereof is communicated with the upper part of the four-way element 8, and the pressure taking valve 5-1 is arranged at the joint of the measuring instrument and the pressure guiding pipeline 10 thereof. The opening under the four-way element and the inclined lower part are respectively communicated with the first collector 2-1 and the second collector 2-2, and the corresponding first inlet cut-off valve 5-2 and the second inlet cut-off valve 5-5 are respectively arranged at the connecting positions.
The first collector 2-1 and the second collector 2-2 are arranged in parallel, in other embodiments, a plurality of collectors can be arranged according to specific requirements, and correspondingly, the four-way element 8 is replaced by other communicating pieces for ensuring the communication between the plurality of collectors, the pressure guiding pipe and the pressure taking port 12. When the collector is required to clean the accumulated objects, the other collector is thrown and cut out of the collector required to clean the accumulated objects, so that the seamless connection of the cleaning and the throwing of the collectors is realized, and the continuity of parameter measurement is ensured. The upper parts of the first collector 2-1 and the second collector 2-2 are respectively communicated with an opening right below and an opening obliquely below the four-way element. The first sight glass 3-1 is arranged on the first collector 2-1, and the second sight glass 3-2 is arranged on the second collector 2-2, so that the condition in the corresponding collector can be observed, and the quantity of the accumulated polymers in the collector can be conveniently observed to determine whether the collector needs cleaning or not.
The lower part of the first collector 2-1 is provided with a first sample return port and a first outlet, a first sample return port cut-off valve 5-3 and a first outlet valve 5-4 are arranged at corresponding positions, the lower part of the second collector 2-2 is provided with a second sample return port and a second outlet, and a second sample return port cut-off valve 5-6 and a second outlet valve 5-7 are arranged at corresponding positions. A sample return port is provided on the collector for returning the accumulation within the collector to the device or conduit under test. The other end of the first outlet valve 5-4 is provided with a first drain pipe cap 4-1, the other end of the second outlet valve 5-7 is provided with a second drain pipe cap 4-2, the outlet valve is used for sampling samples in a collector or removing accumulated matters in the collector, and the outlet of the outlet valve is provided with a pipe cap, so that the tightness of the anti-blocking pressure guiding module is ensured.
The first and second collectors 2-1 and 2 are respectively provided with a first compressed air pipeline 6-1 and a second compressed air pipeline 6-2, and the first and second compressed air switch valves 7-1 and 7-2 are respectively arranged on the corresponding compressed air pipelines outside the first and second collectors 2-1 and 2. The outlets of the compressed air lines inside the first and second collectors 2-1, 2 are directed downward toward the inner sides of the corresponding mirrors. When the sight glass is shielded by the accumulated matters in the collector, the compressed air switch valve on the corresponding compressed air pipeline can be opened to purge the sight glass, meanwhile, the accumulated matters in the collector can be discharged quickly, and the collector after the accumulated matters are cleaned is subjected to gas replacement, so that tiny solid particles or wet gas floating in the collector are discharged thoroughly, and the anti-blocking performance of the anti-blocking pressure guiding module is ensured.
In this embodiment, the anti-blocking pressure guiding module is mainly used for taking pressure of facilities (including but not limited to an incinerator, a flue gas pipeline and the like) containing tiny solid particles (such as dust and the like) in the micro-pressure gas phase medium, and utilizes the collector to carry out sedimentation separation on the tiny solid particles, so that the cleanliness of the gas phase medium in the pressure guiding pipe of the subsequent measuring element is ensured, the accuracy of measuring parameters is prevented from being influenced by the blocking of the pressure guiding pipe, and because the collector can accommodate a certain amount of gas phase medium, the difficulty of daily maintenance of the pressure guiding pipe and the cleaning times of the collector can be reduced, and meanwhile, closed collection and centralized treatment on the tiny solid particles can be realized, so that the toxic and harmful substances are prevented from polluting the surrounding environment and injuring personnel. And the anti-blocking pressure guiding module can also replace a reverse blowing measurement pressure guiding system, is used for taking pressure of facilities with small solid particles (such as dust and the like) or large gas phase medium humidity in positive pressure gas phase medium, settling and separating the small solid particles or wet gas, guaranteeing the cleanliness of the gas phase medium in a pressure guiding pipe of a subsequent measuring element, preventing the pressure guiding pipe from blocking to influence the accuracy of measuring parameters, reducing the consumption of compressed air and the difficulty and the times of daily maintenance, reducing the consumption of energy, and simultaneously realizing closed collection and centralized treatment of small solid particles or wet gas condensate, and preventing toxic and harmful substances from polluting the surrounding environment and causing injury to personnel.
The pressure taking and cleaning process of the utility model is briefly described as follows:
when the tested equipment and the pipeline are provided with sample return ports, the sample return port cut-off valve of the collector is communicated with the sample return ports on the tested equipment and the pipeline:
1. in the initial state, all valves are in a closed state, when pressure is required to be taken, the first inlet shutoff valve 5-2 is opened, the floating condition of micro solid particles or wet gas condensate in the first collector 2-1 is observed through the first sight glass 7-1, after the micro solid particles or wet gas condensate in the first collector 2-1 is settled, the pressure taking valve 5-1 is opened, and pressure is taken from a measuring medium.
2. After a period of time, the second collector 2-1 is determined whether cleaning is required by observing through a sight glass or empirically judging the accumulation of fine solid particles or wet gas condensate in the first collector 2-1.
3. If the first collector 2-1 is determined to be cleaned, the second inlet cut-off valve 5-5 is opened, the floating condition of the tiny solid particles or wet gas condensate in the second collector 2-2 is observed through the second sight glass, and after the tiny solid particles or wet gas condensate in the second collector 2-2 is settled, the first inlet cut-off valve 5-2 is closed, so that the second collector 2-2 is put into use and the first collector 2-1 is cut out.
4. After the first collector 2-1 is cut out, the first sample return port shut-off valve 5-3 is opened, and then the first compressed air on-off valve 7-1 is slowly opened, and the discharge of the accumulated material in the first collector 2-1 is observed through the first sight glass.
5. After the accumulated matters in the first collector 2-1 are completely discharged, the condition of floating solid particles in the first collector 2-1 can be observed through the first sight glass, the first collector 2-1 is continuously ventilated for a period of time according to actual requirements, and floating tiny solid particles or wet gas condensate is cleaned.
6. After the cleaning of the first collector 2-1 is completed, the first compressed air switching valve 7-1 is closed, and then the first sample return port shut-off valve 5-3 is closed. So far, the collector 2-1 is in a standby state after cleaning.
7. When the second collector 2-2 to be put into use needs to be cleaned, switching the first collector 2-1 into use and cutting out the second collector 2-2, wherein the cleaning step is the same as that of the first collector 2-1; the two collectors are mutually standby, so that on-line switching can be realized, and the continuity of parameter measurement is ensured.
When the tested equipment and the pipeline are not provided with a sample return port:
1. in the initial state, all valves are in a closed state, when pressure is required to be taken, the first inlet shutoff valve 5-2 is opened, the floating condition of tiny solid particles or condensate in the first collector 2-1 is observed through the first sight glass, and after the tiny solid particles or wet gas condensate in the first collector 2-1 is settled, the pressure taking valve 5-1 is opened to take pressure to a measuring medium.
2. After a period of time, the first sight glass is used to observe or empirically determine the accumulation of fine solid particles or wet gas condensate in the first collector 2-1 to determine whether the first collector 2-1 needs to be cleaned.
3. If the first collector 2-1 is determined to be cleaned, the second inlet cut-off valve 5-5 is opened, the floating condition of the tiny solid particles or wet gas condensate in the second collector 2-2 is observed through the second sight glass, and after the tiny solid particles or wet gas condensate in the second collector 2-2 is settled, the first inlet cut-off valve 5-2 is closed, so that the second collector 2-2 is put into use and the first collector 2-1 is cut out.
4. After the first collector 2-1 is cut out, the first drain cap 4-1 is removed and the accumulated material collecting device is connected, the first outlet valve 5-4 is opened, then the first compressed air on-off valve 7-1 is slowly opened, and the discharge condition of the accumulated material in the first collector 2-1 is observed through the first sight glass.
5. After the accumulated matters in the first collector 2-1 are completely discharged, the condition of floating solid particles in the collector 2-1 can be observed through the first sight glass, the first collector 2-1 is continuously ventilated for a period of time according to actual requirements, and floating tiny solid particles or wet gas condensate is cleaned.
6. After the cleaning of the first collector 2-1 is completed, the first compressed air switching valve 7-1 is closed, the accumulation collecting apparatus is taken away, and then the first outlet valve 5-4 is closed, and the first sewage pipe cap 4-1 is installed. So far, the first collector 2-1 is in a standby state after cleaning.
7. When the second collector 2-2 to be put into use needs to be cleaned, switching the first collector 2-1 into use and cutting out the second collector 2-2, wherein the cleaning step is the same as that of the first collector 2-1; the two collectors are mutually standby, so that on-line switching can be realized, and the continuity of parameter measurement is ensured.
The anti-blocking pressure-guiding module can carry out on-line airtight sampling on collected tiny solid particles or wet gas condensate:
taking the first collector 2-1 in a use state as an example, the first sewage pipe cap 4-1 can be taken down, sampling and collecting equipment is connected, and then the first outlet valve 5-4 is slowly opened to perform online airtight sampling on the sample. After the sampling is completed, the first outlet valve 5-4 is closed, the sampling and collecting device is taken down, and the first sewage drain cap 4-1 is covered.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a safe and reliable prevents stifled guide die piece, includes the pressure pipe of getting that is connected with tested equipment or pipeline, its characterized in that: the pressure taking pipe is connected with the pressure guiding pipe and at least two collectors through a communicating piece, the pressure guiding pipe and the collectors are connected in parallel, a pressure taking valve is arranged between the pressure guiding pipe and the communicating piece, the pressure guiding pipe is connected with the measuring instrument and the pressure guiding pipeline thereof, an inlet cut-off valve is arranged between the communicating piece and the collectors, and the collectors are also provided with a sample return port cut-off valve which is used for connecting with a sample return port of tested equipment or a pipeline and an outlet valve which is used for removing accumulated matters or sampling in the collectors; the collector is provided with a sight glass for observing the inside of the collector and a compressed air pipeline for discharging accumulated matters in the collector, an outlet of the compressed air pipeline is positioned in the collector, and a compressed air switch valve is arranged on a compressed air pipeline positioned outside the collector.
2. The safe and reliable anti-blocking guide module according to claim 1, wherein: the other end of the outlet valve is provided with a drain pipe cap for sealing.
3. The safe and reliable anti-blocking guide module according to claim 1, wherein: the measuring instrument and the pressure guide pipeline thereof are positioned above the communicating piece, and the collector is positioned below or obliquely below the communicating piece.
4. The safe and reliable anti-blocking guide module according to claim 1, wherein: the outlet of the compressed air line is located above the inside of the sight glass and is directed towards the sight glass.
5. The safe and reliable anti-blocking guide module according to claim 1, wherein: the pressure taking pipe is horizontally communicated with the pressure guiding port on the tested equipment or the pipeline, and the other end of the pressure taking pipe is horizontally communicated with the communicating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320746341.8U CN219532361U (en) | 2023-04-04 | 2023-04-04 | Safe and reliable anti-blocking guide module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320746341.8U CN219532361U (en) | 2023-04-04 | 2023-04-04 | Safe and reliable anti-blocking guide module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219532361U true CN219532361U (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320746341.8U Active CN219532361U (en) | 2023-04-04 | 2023-04-04 | Safe and reliable anti-blocking guide module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219532361U (en) |
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2023
- 2023-04-04 CN CN202320746341.8U patent/CN219532361U/en active Active
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of utility model: A safe and reliable anti blocking pressure module Granted publication date: 20230815 Pledgee: Zhongyuan bank Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG ZHIDA PETROCHEMICAL ENGINEERING Co.,Ltd. Registration number: Y2024980040307 |