CN114439735B - A method for monitoring safe operation of a catalytic oil-free compression system - Google Patents
A method for monitoring safe operation of a catalytic oil-free compression system Download PDFInfo
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- CN114439735B CN114439735B CN202111628888.XA CN202111628888A CN114439735B CN 114439735 B CN114439735 B CN 114439735B CN 202111628888 A CN202111628888 A CN 202111628888A CN 114439735 B CN114439735 B CN 114439735B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/50—Presence of foreign matter in the fluid
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
本发明提供一种监测催化无油压缩系统安全运行的方法，使用催化净化器催化分解压缩气体中的油类杂质，在催化净化器的进气端和排气端分别设置第一含油量检测设备和第二含油量检测设备检测压缩气体的含油量，经催化净化器净化的压缩气体先由第二含油量检测设备检测其含油量，再使用缓冲设备对其缓冲减速，压缩气体在缓冲设备内缓冲的时间大于第二含油量检测设备的检测时间，第一含油量检测设备和第二含油量检测设备的检测结果以及两者之间的差值均显示在显示屏上。本发明能使用户能实时掌握压缩机和催化净化器两者的工作状态，判断压缩机是否跑油以及催化净化器内的催化剂是否面临过载的风险，保障用户用气品质，保护整机安全。
The present invention provides a method for monitoring the safe operation of a catalytic oil-free compression system, using a catalytic purifier to catalytically decompose oil impurities in compressed gas, and respectively setting a first oil content detection device and a second oil content detection device at the intake end and the exhaust end of the catalytic purifier to detect the oil content of the compressed gas, the compressed gas purified by the catalytic purifier is first detected by the second oil content detection device for its oil content, and then buffered and decelerated by a buffer device, the buffering time of the compressed gas in the buffer device is greater than the detection time of the second oil content detection device, and the detection results of the first oil content detection device and the second oil content detection device and the difference between the two are displayed on a display screen. The present invention enables users to grasp the working status of both the compressor and the catalytic purifier in real time, judge whether the compressor is leaking oil and whether the catalyst in the catalytic purifier is facing the risk of overload, ensure the quality of gas used by users, and protect the safety of the whole machine.
Description
Technical Field
The invention relates to the technical field of compressed air purification, in particular to a method for monitoring safe operation of a catalytic oil-free compression system.
Background
Compressed air is used as a low-cost power source and is widely applied to various industries such as equipment driving, material conveying, drying, blowing, purging, pneumatic instrument elements, automatic control and the like. The compressor for preparing the compressed air has high power, high requirements on lubrication and heat dissipation during working, better lubrication effect can be obtained by using the compressor of lubricating oil compared with oil-free compressors such as a dry compressor or a water lubrication compressor, the heat dissipation efficiency is higher, the cost is lower, but the produced compressed air inevitably contains oil impurities. In the special industries of electronics, food, medicine, textile and the like, oil impurities can cause harm to the product quality, production instruments, environment and even the health of operators, so the quality requirements of the industries on compressed air are higher, and some of the industries even definitely require the adoption of oil-free compressed air. Therefore, in the prior art, a catalytic purification device is generally configured at the exhaust end of the oil lubrication compressor to construct an oil-free compression system, and a catalyst is arranged in the catalytic purification device, so that oil impurities can undergo catalytic oxidation reaction at a high temperature of 180-200 ℃ and are decomposed into carbon dioxide and water, and compressed air is purified.
The oil content of the compressed air finally produced by the oil-free compression system is determined by the lubricating oil running rate of the compressor and the decomposition efficiency of the catalytic purification equipment on oil substances, if the compressor fails to cause lubricating oil leakage and running oil, a large amount of oil impurities can enter the catalytic purifier along with the compressed air, as the amount of the catalyst in the catalytic purifier is limited, the oil impurities which can be treated are also limited, once the oil impurities in the catalytic purifier exceed the maximum load of the catalyst, the overload failure of the catalyst and the damage of the catalytic purifier can be quickly caused, and if the catalytic purifier is damaged, the quality of the compressed air discharged from the catalytic purifier cannot be guaranteed, and once the compressed air with the oil content exceeding the standard is input into gas utilization equipment of a user, the economic loss can be caused for the production of the user. Therefore, to ensure the quality of the gas used by the user, the oil content of the purified compressed air accords with the production gas requirement of the user, on one hand, the working state of the compressor is required to be known in real time, the phenomenon of oil leakage of the compressor is ensured not to occur, and on the other hand, the working state of the catalytic purification equipment is required to be known in real time, and the catalyst in the catalytic purification equipment is ensured not to be invalid.
Although the oil content detection equipment is arranged at the exhaust end of the compressor, whether the compressor runs oil can be confirmed, and the oil content detection equipment is arranged at the exhaust end of the catalytic purification equipment, whether the oil removal efficiency of the catalytic purification equipment is normal or not can be confirmed, however, the detection rate of the oil content detection equipment in the prior art is not high in the flow rate of high-pressure gas, often the detection result is not yet coming out, the detected compressed air enters the gas utilization equipment of a user, so that the defect that the detection data of the oil content detection equipment lag occurs, the oil content of the compressed air cannot be fed back in advance before the compressed air enters the gas utilization equipment of the user, and the quality of the gas utilization of the user cannot be effectively guaranteed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for monitoring the safe operation of the catalytic oilless compression system, so that a user can grasp the working states of both the compressor and the catalytic purification equipment in real time, the use safety of the catalytic purification equipment can be ensured, the gas quality of the user can be ensured, the gas safety of the user is ensured, and the operation safety of the whole machine is protected.
The technical scheme of the invention is that the method for monitoring the safe operation of the catalytic oilless compression system is provided, a compressor is used for compressing gas, a catalytic purifier is used for catalytically decomposing oil impurities in the compressed gas, a first oil content detection device is used for detecting the oil content of the compressed gas at the air inlet end of the catalytic purifier, a second oil content detection device is used for detecting the oil content of the compressed gas discharged by the catalytic purifier, a buffer device is used for buffering and decelerating the compressed gas discharged by the catalytic purifier and discharging the compressed gas outwards, a display screen is used for displaying the detection results of the first oil content detection device and the second oil content detection device and the difference value between the first oil content detection device and the second oil content detection device, and the specific implementation steps are as follows:
1) Determining the detection time t1 of the second oil content detection device, namely the duration from the discharge of the compressed gas from the catalytic cleaner to the display screen displaying the detection result of the second oil content detection device;
2) Setting time t2 for the compressed gas to be buffered in the buffering device according to the detection time t1 of the second oil content detection device, so that t2 is more than t1;
3) Designing and determining the structure of the buffer device according to the time t2 when the compressed gas needs to be buffered in the buffer device;
4) The second oil content detection equipment and the buffer equipment are arranged on an exhaust pipe of the catalytic purifier, so that compressed gas is detected by the oil content detection equipment and then enters the buffer equipment for buffering;
5) Monitoring the display result of the display screen in real time, if the display result of the first oil content detection equipment is not out of standard, continuously supplying compressed gas to the catalytic purifier, otherwise immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the compressor has oil leakage fault; if the detection result of the second oil content detection device is not out of standard, connecting the exhaust end of the buffer device with the gas utilization device to enable the catalytic oilless compression system to supply gas to the gas utilization device, otherwise, cutting off the connection between the exhaust end of the buffer device and the gas utilization device to enable the catalytic oilless compression system to stop supplying gas to the gas utilization device; if the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device is not out of standard, continuously supplying compressed gas to the catalytic purifier, or immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the catalyst in the catalytic purifier is overloaded.
Compared with the prior art, the method for monitoring the safe operation of the catalytic oil-free compression system has the following advantages: determining the detection time t1 of the second oil content detection equipment and the time t2 of the compressed gas needing to be buffered in the buffer equipment, so that t2 is more than t1, and before the oil content detection result of the detected compressed gas comes out, the detected compressed gas can be buffered and slowly flows in the buffer equipment all the time, and can not be directly input into the gas utilization equipment of a user, so that the oil content of the compressed air discharged by the catalytic purifier can be detected in real time, and the compressed gas with unknown oil content can be prevented from being input into the gas utilization equipment of the user; on the premise of ensuring that the oil content of the compressed gas does not exceed the standard, the exhaust end of the buffer device is connected with the gas utilization device, so that the catalytic oilless compression system can continuously supply the compressed gas to the gas utilization device, and the gas utilization quality of a user is ensured; when the oil content of the compressed gas exceeds the standard, the connection between the exhaust end of the buffer device and the gas utilization device is cut off, so that the catalytic oilless compression system stops supplying gas to the gas utilization device, the loss of the compressed air with the oil content exceeding the standard to a user is avoided, and the gas utilization safety of the user is ensured; the method comprises the steps that a first oil content detection device is arranged at an air inlet end of a catalytic purifier, a lag exists in a detection result of the first oil content detection device, if the time of compressed gas passing through the catalytic purifier is negligible compared with the time of compressed gas passing through a buffer device, the first oil content detection device and the second oil content detection device can be considered to be simultaneously out of detection results, namely, the oil content of the compressed gas before and after purification can be simultaneously displayed on a display screen, whether the working state of the compressor is normal or not can be judged according to the detection results of the first oil content detection device, whether the oil running state occurs or not is judged, whether a sealing element and the like in the compressor need to be replaced or not is deduced, and the oil removal efficiency change of the catalytic purifier can be represented by a difference value between the first oil content detection device and the second oil content detection device, so that whether a catalyst in the catalytic purifier is overloaded or invalid can be judged; when the detection result of the first oil content detection device is increased and the detection result of the second oil content detection device is unchanged, the difference between the two is increased, and the oil content in the compressed gas is still within the load range of the catalyst; when the detection result of the first oil content detection device is increased and the detection result of the second oil content detection device is also increased, the difference value between the two is increased to the peak value and then is reduced, so that the catalyst is judged to be overloaded at the moment, the gas supply to the catalytic cleaner is cut off immediately, the gas supply to the gas utilization device is cut off, the machine is stopped, the loss caused by the fact that the compressed gas with the oil content exceeding the standard is input into the gas utilization device of a user is avoided, the complete failure caused by continuous overload of the catalyst is avoided, and the operation safety of the whole machine device is ensured. The method can also be used to select the type of catalyst.
Preferably, in step 1), a first air pressure sensor is arranged at the exhaust end of the catalytic cleaner or at the air inlet end of the second oil content detection device, after initial power-on, the compressor is started, the time when the first air pressure sensor detects the rated exhaust pressure of the compressor is recorded as t01, the time when the display screen changes the display result of the second oil content detection device is recorded as t02, and t1=t02-t 01. By adopting the mode, the detection time t1 of the second oil content detection equipment can be accurately determined, and the time t2 for the compressed gas to be buffered in the buffer equipment and the structure of the corresponding buffer equipment are designed are used as the basis.
Preferably, in step 3), a second air pressure sensor and a third air pressure sensor are respectively arranged at an air inlet end and an air outlet end of the buffer device, after initial power-on, the compressor is started, the time when the second air pressure sensor detects the rated air outlet pressure of the compressor is recorded as t03, the time when the third air pressure sensor detects the rated air outlet pressure of the compressor is recorded as t04, t2=t04-t 03, and the buffer device is designed and verified to have a structure such that t2> t1. By adopting the method, the time t2 of the compressed gas needing to be buffered in the buffer equipment can be accurately determined, the structure of the corresponding buffer equipment can be designed and verified according to the time t2 and the time t1 can be ensured.
Preferably, the buffer device is provided with a buffer exhaust pipe, the buffer device externally discharges compressed gas through the buffer exhaust pipe, the buffer exhaust pipe is provided with an air supply pipe and an air exhaust pipe, the air supply pipe is used for butt joint of the air utilization device and supplying air for the air utilization device, and the air exhaust pipe is used for discharging the compressed gas to the air; when the initial power-on and the display screen in the step 5) display that the detection result of the second oil content detection equipment exceeds the standard, the air supply pipe is closed, and the air exhaust pipe is opened; when the display screen in the step 5) shows that the detection result of the second oil content detection device is out of standard, the air supply pipe is opened, and the air exhaust pipe is closed. In this way, when the detection result of the second oil content detection device shows that the oil content of the compressed gas does not exceed the standard, the air supply pipe is opened, the air exhaust pipe is closed, and the catalytic oil-free compression system supplies air to the air utilization device; when the detection result of the second oil content detection device shows that the oil content of the compressed gas exceeds the standard, the air supply pipe is closed, so that the catalytic oil-free compression system stops supplying air to the air utilization device, and the air exhaust pipe is opened, so that the compressed gas produced by the catalytic oil-free compression system can be always discharged outwards, thereby protecting the air utilization device of a user and avoiding unsmooth exhaust to endanger the safety of the whole machine.
Preferably, the air inlet end of the catalytic converter is provided with a catalytic air inlet pipe, the catalytic air inlet pipe is provided with a catalytic converter air inlet pipe and an empty calandria, the catalytic converter air inlet pipe is used for guiding compressed air into the catalytic converter, and the empty calandria is used for discharging the compressed air empty; when the initial power-on and the display screen in the step 5) display that the detection result of the first oil content detection equipment exceeds the standard, the air inlet pipe of the catalyst is closed, and the empty calandria is opened; when the display screen in the step 5) shows that the detection result of the first oil content detection device does not exceed the standard, the air inlet pipe of the catalyst is opened, and the empty calandria is closed. In this way, when the first oil content detection device detects that the oil content of the compressed air at the air inlet end of the catalytic purifier does not exceed the standard, the air inlet pipe of the catalytic purifier is opened, the air discharge pipe is closed, and the catalytic purifier continuously purifies the compressed air; when the first oil content detection equipment detects that the oil content of the compressed air at the air inlet end of the catalytic purifier exceeds the standard, the air inlet pipe of the catalytic converter is closed, the air discharge pipe is opened, so that the compressed air is not led into the catalytic purifier any more, but is discharged to the air through the air discharge pipe, namely, the catalytic purifier is protected, and the situation that the safety of the whole machine is endangered due to unsmooth exhaust is avoided.
Preferably, when the display screen in step 5) displays that the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device exceeds the standard, the air inlet pipe of the catalyst is closed, and the air discharge pipe is opened; when the display screen in the step 5) shows that the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device is not out of standard, the air inlet pipe of the catalyst is opened, and the air discharge pipe is closed. By adopting the mode, when the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device exceeds the standard, the catalyst in the catalytic purifier can be judged to face overload, the catalyst is likely to lose efficacy due to overload, the air inlet pipe of the catalytic converter is closed, the empty pipe is opened, so that the compressed gas with high oil content is not led into the catalytic purifier any more, the catalytic purifier is protected, and the exhaust gas is prevented from being unsmooth to endanger the safety of the whole machine.
Preferably, an alarm is also used, and in step 5), when the display screen displays that the detection result of the first oil content detection device exceeds the standard or the detection result of the second oil content detection device exceeds the standard or the difference value between the two exceeds the standard, the alarm sounds and/or lights. By adopting the mode, the worker is not required to stare at the display screen in real time, and when the detection result of the first oil content detection equipment exceeds the standard or the detection result of the second oil content detection equipment exceeds the standard or the difference value between the first oil content detection equipment and the second oil content detection equipment exceeds the standard, the alarm can prompt the worker to cut off the air supply to the catalytic purifier or the air utilization equipment in time, so that the air utilization safety of the user is ensured, and prompt the worker to take measures in time to check faults, so that the safety of the whole machine is ensured.
Preferably, the compressor adopts an oil injection screw compressor, compressed gas discharged by the oil injection screw compressor sequentially passes through an oil-gas separator and a gas-liquid separator and then is introduced into the catalytic purifier, the oil-gas separator is used for separating oil in the compressed gas, and the gas-liquid separator is used for separating liquid water in the compressed gas. By adopting the mode, the oil injection screw compressor has good lubrication effect, high heat dissipation efficiency and low cost, and the produced compressed air is input into the catalytic converter after oil liquid is removed through the oil-gas separator and liquid water is removed through the gas-liquid separator, so that the load of a catalyst in the catalytic converter can be reduced, the service life of the catalytic converter is prolonged, and the quality of gas used by a user is also guaranteed.
Preferably, the compressed gas discharged from the gas-liquid separator passes through the heat exchanger before entering the catalytic converter, the compressed gas discharged from the catalytic converter passes through the heat exchanger before passing through the buffer device, the heat exchanger recovers heat of the compressed gas discharged from the catalytic converter, and the compressed gas discharged from the gas-liquid separator is preheated. According to the method, waste heat recovery can be conducted on exhaust gas of the catalytic converter, in the prior art, after compressed gas is heated to a high temperature of 180-200 ℃ in the catalytic converter, oil substances can be catalytically decomposed, compressed air discharged by the catalytic converter preheats compressed air discharged by the gas-liquid separator through the heat exchanger, so that the load of the catalytic converter on heating the compressed gas is reduced, the working efficiency of the catalytic converter can be improved while energy is saved, and the gas supply efficiency is guaranteed.
Preferably, the heat exchanger is a buffer device, two zigzag U-shaped heat exchange pipelines are arranged in the heat exchanger, the two U-shaped heat exchange pipelines are arranged in a staggered mode, compressed gas discharged from the gas-liquid separator firstly passes through the first oil content detection device and then enters the catalytic purifier through one U-shaped heat exchange pipeline, compressed gas discharged from the catalytic purifier firstly passes through the second oil content detection device and then is discharged outside after passing through the other U-shaped heat exchange pipeline, and the compressed gas is buffered and decelerated in the U-shaped heat exchange pipeline. By adopting the mode, the compressed gas is subjected to heat exchange and buffer deceleration through the tortuous U-shaped heat exchange pipeline in the heat exchanger, so that the time for detection of the oil content detection equipment can be strived for while energy is saved, the detected compressed gas is prevented from being input into the gas utilization equipment of a user before the oil content detection result of the compressed gas comes out, and the gas supply quality is ensured; the functions of gas heat exchange and buffering are integrated on the heat exchanger, so that the volume of the whole machine is reduced. At this time, the detection result of the first oil content detection device is earlier than the detection result of the second oil content detection device, if the time of the compressed gas passing through the catalytic cleaner is negligible compared with the time of the compressed gas passing through the U-shaped heat exchange pipeline, the time of the detection result of the first oil content detection device earlier than the time of the detection result of the second oil content detection device is just the time of the compressed gas passing through the U-shaped heat exchange pipeline, at this time, the detection result of the first oil content detection device, namely the oil content of the compressed gas at the air inlet end of the catalytic cleaner, the detection result of the second oil content detection device, namely the oil content of the compressed gas at the air outlet end of the catalytic cleaner, is constant, so long as the catalyst is not overloaded, the real-time difference between the two is considered to be the oil removal efficiency to be achieved by the catalytic cleaner, the peak value of the catalytic cleaner can be set according to the working parameters of the catalytic cleaner, when the peak value reaches, the air supply to the catalytic cleaner is cut off immediately, the air supply to the catalytic cleaner is stopped, the air content of the compressed gas can be prevented from entering the catalytic cleaner before the high oil content of the catalytic cleaner is stopped, the overload is prevented from entering the catalytic cleaner, the compressed gas can be prevented from entering the air inlet end of the catalytic cleaner, and the overload safety of the catalytic cleaner is avoided, and the user is prevented from losing safety is guaranteed, and the user is prevented from being caused.
Drawings
Fig. 1 is a schematic diagram of a catalytic oil-free compression system employed in the present invention.
Fig. 2 is an enlarged view of the structure of the region a in fig. 1.
As shown in the figure: 1. the oil injection screw compressor, 2, the gas-liquid separator, 3, the gas-liquid separation blast pipe, 4, the dividing wall type heat exchanger, 5, the catalysis intake pipe, 6, the catalytic cleaner, 7, the catalysis blast pipe, 8, the heat exchange blast pipe, 9, the electronic cooler, 10, the filtration adsorption tank, 11, the second oil content check out test set, 11-1, the decompression valve body, 11-2, the pressure sensor, 11-3 solenoid valve, 11-4 oil content check out test set, 11-5 exhaust check out valve, 12, the radiator, 13, the first oil content check out test set.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification.
In the drawings, the thickness, size and shape of the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including" and/or "having," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Furthermore, when a statement such as "… at least one" appears after a list of features listed, the entire listed feature is modified rather than the individual elements in the list.
Example 1:
The invention relates to a method for monitoring safe operation of a catalytic oilless compression system, which is shown in figure 1, and comprises a compressor, an oil-gas separator (not shown), a gas-liquid separator 2, a catalytic purifier 6, a heat exchanger, a first oil content detection device 13, a second oil content detection device 11, an electronic cooler 9, a filtering adsorption tank 10, a radiator 12, a gas-liquid separation exhaust pipe 3, a display screen (not shown) and an alarm (not shown), wherein the compressor adopts an oil injection screw compressor 1, the radiator 12 is arranged above the oil injection screw compressor 1, the oil injection screw compressor 1 compresses air and is lubricated by lubricating oil during operation, and the radiator 12 timely dissipates heat and cools the oil injection screw compressor 1. The heat exchanger adopts a dividing wall type heat exchanger 4, two zigzag U-shaped heat exchange pipelines are arranged in the dividing wall type heat exchanger 4, and the two U-shaped heat exchange pipelines are arranged in a staggered mode. The exhaust port of the oil injection screw compressor 1 is communicated with the air inlet of the oil-gas separator, the air outlet of the oil-gas separator is communicated with the air inlet of the gas-liquid separator 2, the gas-liquid separation exhaust pipe 3 is arranged at the air outlet of the gas-liquid separator, the first oil content detection equipment 13 is arranged on the gas-liquid separation exhaust pipe 3, the air inlet of the catalytic purifier 6 is provided with a catalytic air inlet pipe 5, the gas-liquid separation exhaust pipe 3 and the catalytic air inlet pipe 5 are respectively communicated with two ends of the same U-shaped heat exchange pipeline in the dividing wall type heat exchanger 4, the exhaust pipe of the catalytic purifier 6 is a catalytic exhaust pipe 7, the catalytic exhaust pipe 7 is communicated with one end of the other U-shaped heat exchange pipeline in the dividing wall type heat exchanger 4, the other end of the U-shaped heat exchange pipeline is provided with a heat exchange exhaust pipe 8, and the heat exchange exhaust pipe 8 passes through a radiator 12 and is communicated with gas utilization equipment of a user. Be provided with the detection branch pipe of slender stainless steel material on the catalytic exhaust pipe 7, be provided with electronic cooler 9 on the pipe wall of detection branch pipe, the gas outlet of detection branch pipe communicates with the air inlet of filtering the adsorption tank 10, the gas outlet of filtering the adsorption tank 10 communicates with second oil content check out test set 11, and the testing result of first oil content check out test set 13 and second oil content check out test set 11 all shows through the display screen real time.
As shown in fig. 2, the second oil content detecting apparatus 11 includes a decompression valve body 11-1, a pressure sensor 11-2, an electromagnetic valve 11-3, an oil content detecting core 11-4, and an exhaust check valve 11-5 connected in this order, an air outlet of the filter adsorption tank 10 is connected to the decompression valve body 11-1, the decompression valve body 11-1 decompresses the compressed gas discharged from the filter adsorption tank 10 and introduces it into the pressure sensor 11-2, the pressure sensor 11-2 detects the gas pressure introduced by the decompression valve body 11-1 and opens the electromagnetic valve 11-3 after the gas pressure is qualified, the electromagnetic valve 11-3 introduces the decompressed gas into the oil content detecting core 11-4 after opening, the oil content of the decompressed gas is detected by the oil content detecting core 11-4, and the decompressed gas introduced into the oil content detecting core 11-4 is discharged to the outside via the exhaust check valve 11-5 after the detection.
The method for monitoring the safe operation of the catalytic oil-free compression system of the invention firstly carries out the following steps when the partition type heat exchanger 4 is configured:
1) Determining the detection time t1 of the second oil content detection device, namely the duration from the discharge of the compressed gas from the catalytic cleaner to the display screen displaying the detection result of the second oil content detection device;
2) Setting time t2 for the compressed gas to be buffered in the buffering device according to the detection time t1 of the second oil content detection device, so that t2 is more than t1;
3) Designing and determining the structure of the buffer device according to the time t2 when the compressed gas needs to be buffered in the buffer device;
4) And the second oil content detection equipment and the buffer equipment are both arranged on an exhaust pipe of the catalytic purifier, so that compressed gas is detected by the oil content detection equipment and then enters the buffer equipment for buffering.
Starting the catalytic oilless compression system, compressing air at normal temperature and normal pressure by an oil injection screw compressor 1, separating oil from the compressed air by an oil-gas separator, then entering a gas-liquid separator 2, performing secondary cyclone separation to remove liquid water by the gas-liquid separator 2, introducing the gas-liquid separation exhaust pipe 3 into a U-shaped heat exchange pipeline in a dividing wall type heat exchanger 4, detecting the oil content of the compressed air by a first oil content detection device 13 before entering the U-shaped heat exchange pipeline, displaying the detection result on a display screen in real time, wherein the temperature of the compressed air is about 80 ℃, then flowing out of the dividing wall type heat exchanger 4, flowing into a catalytic purifier 6 by a catalytic air inlet pipe 5, wrapping heat preservation cotton outside the catalytic purifier 6, arranging a catalyst in the catalytic purifier 6, heating the compressed air to 180-200 ℃ in the catalytic purifier 6, and then performing complex catalytic oxidation reaction under the action of the catalyst to decompose C6+ carbon-containing compounds into carbon dioxide and water so as to obtain compressed air; the purified compressed gas is cooled by an electronic cooler 9 through a detection branch pipe, enters a filtering adsorption tank 10 to remove water and solid impurities, finally enters a second oil content detection device 11 to detect the oil content of the compressed gas and display the detection result in real time through a display screen, and the vast majority of the purified compressed gas is led into another U-shaped heat exchange pipeline in the dividing wall type heat exchanger 4 through a catalytic exhaust pipe 7 and is discharged outwards after being cooled and discharged by a radiator 12 through a heat exchange exhaust pipe 8, and the difference value between the real-time detection result of the first oil content detection device 13 and the real-time detection result of the second oil content detection device 11 is also displayed in real time through the display screen. In this process, the purified compressed gas will conduct heat with the compressed gas before purification, recover the heat of the purified compressed gas, and preheat the compressed gas that will enter the catalytic cleaner 6, the energy-saving effect is good, the catalytic reaction in the catalytic cleaner 6 is more efficient, and the U-shaped heat exchange pipeline in the dividing wall type heat exchanger 4 can also buffer and slow down the purified compressed gas, delay the purified compressed gas to be discharged to the outside, namely the heat exchange exhaust pipe 8 is the buffer exhaust pipe, before the oil content detection result of the detected compressed gas comes out, the part of compressed gas will not be input into the gas using equipment of the user.
Monitoring the display result of the display screen in real time, if the display result of the first oil content detection equipment is not out of standard, continuously supplying compressed gas to the catalytic purifier, otherwise immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the compressor has oil leakage fault; if the detection result of the second oil content detection device is not out of standard, connecting the exhaust end of the buffer device with the gas utilization device to enable the catalytic oilless compression system to supply gas to the gas utilization device, otherwise, cutting off the connection between the exhaust end of the buffer device and the gas utilization device to enable the catalytic oilless compression system to stop supplying gas to the gas utilization device; if the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device is not out of standard, continuously supplying compressed gas to the catalytic purifier, or immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the catalyst in the catalytic purifier is overloaded.
The buffering and decelerating of the purified compressed gas are required in the catalytic oilless compression system of the invention, because the detection rate of the second oil content detection device 11 is not as fast as the flow rate of the compressed gas, and in order to ensure the gas safety of users, the compressed gas with unknown oil content is not allowed to be input into the gas utilization device of the users before the oil content detection result of the compressed gas is obtained. When the second oil content detection device 11 detects that the oil content of the compressed air at the air inlet end of the catalytic converter exceeds the standard, the alarm can give out an audible and visual alarm, and at the moment, the heat exchange exhaust pipe 8 should be immediately cut off to supply air to the air utilization device of a user, so that the air utilization safety of the user is ensured, and then the machine is stopped for checking, and whether the oil injection screw compressor 1 has oil leakage caused by failure of a sealing element or the catalytic converter 6 fails is confirmed. When the first oil content detection device 13 detects that the oil content of the compressed air at the exhaust end of the catalytic converter exceeds the standard, the alarm can also give out an audible and visual alarm, and at the moment, the air supply to the catalytic converter 6 should be cut off immediately to protect the catalytic converter 6, so that the oil leakage fault of the oil injection screw compressor 1 can be determined. When the difference between the real-time detection result of the first oil content detection device 13 and the real-time detection result of the second oil content detection device 11 reaches the peak value of the oil removal efficiency of the catalytic purifier, the alarm will also give an audible and visual alarm, and the air supply to the catalytic purifier 6 should be cut off immediately at this time to protect the catalytic purifier 6, if the air supply to the catalytic purifier 6 is not cut off in time, when the difference between the real-time detection result of the first oil content detection device 13 and the real-time detection result of the second oil content detection device 11 falls back quickly after reaching the peak value of the oil removal efficiency of the catalytic purifier, it can be concluded that the catalyst in the catalytic purifier 6 has become overloaded and has failed.
Example 2:
The difference between the method for monitoring the safe operation of the catalytic oilless compression system in this embodiment and the method in embodiment 1 is that in the catalytic oilless compression system adopted in this embodiment, a catalytic air inlet pipe 5 is provided with a catalytic converter air inlet pipe and an empty exhaust pipe, the catalytic converter air inlet pipe is connected and communicated with an air inlet of a catalytic purifier, the catalytic converter air inlet pipe is used for introducing compressed gas into the catalytic purifier, the empty exhaust pipe is not connected with the air inlet of the catalytic purifier, the empty exhaust pipe is used for discharging compressed gas empty, valves are arranged in the catalytic converter air inlet pipe and the empty exhaust pipe, and when the first oil content detection device 13 detects that the oil content of compressed air at the air inlet end of the catalytic purifier is not out of standard, the valve of the catalytic air inlet pipe is opened to enable the compressed gas to be introduced into the catalytic purifier, and the valve of the empty exhaust pipe is closed; when the first oil content detection equipment 13 detects that the oil content of the compressed air at the air inlet end of the catalytic purifier exceeds the standard, the valve of the air inlet pipe of the catalytic converter is closed, so that the compressed air cannot be led into the catalytic purifier, and meanwhile, the valve of the air discharge pipe is opened, so that the compressed air is discharged to the air through the air discharge pipe, and the situation that the safety of the whole machine is endangered due to unsmooth exhaust is avoided.
Example 3:
The difference between the method for monitoring the safe operation of the catalytic oilless compression system in this embodiment and the method in embodiment 1 is that in the catalytic oilless compression system adopted in this embodiment, an air supply pipe and an air exhaust pipe are disposed on the heat exchange exhaust pipe 8, the air supply pipe is used for docking with and supplying air to the air using equipment, the air exhaust pipe is used for discharging compressed air to the air, and valves are disposed on the air supply pipe and the air exhaust pipe. Under the condition that the whole catalytic oilless compression system operates normally, the oil content of compressed gas is not out of standard, a valve of an air supply pipe can be opened, and a valve of an air exhaust pipe is closed; and once the display screen shows that the oil content of the compressed gas exceeds the standard, immediately closing the valve of the air supply pipe, stopping supplying air to the air utilization equipment, and opening the valve of the air exhaust pipe, so that the produced compressed gas is externally discharged through the air exhaust pipe, and the unsmooth discharge of the compressed gas is avoided to endanger the safety of the whole machine.
The foregoing is merely exemplary of the present invention and is not intended to limit the scope of the present invention; modifications and equivalent substitutions are intended to be included in the scope of the claims without departing from the spirit and scope of the present invention.
Claims (8)
1. The method for monitoring the safe operation of the catalytic oilless compression system is characterized in that a compressor is used for compressing gas, a catalytic purifier is used for catalytically decomposing oil impurities in the compressed gas, a first oil content detection device is used for detecting the oil content of the compressed gas at the air inlet end of the catalytic purifier, a second oil content detection device is used for detecting the oil content of the compressed gas discharged by the catalytic purifier, a buffer device is used for buffering and decelerating the compressed gas discharged by the catalytic purifier and discharging the compressed gas outwards, a display screen is used for displaying the detection results of the first oil content detection device and the second oil content detection device and the difference value between the first oil content detection device and the second oil content detection device, and the method comprises the following specific implementation steps:
Step 1), determining the detection time t1 of the second oil content detection equipment, namely, the duration from the discharge of compressed gas from the catalytic cleaner to the display screen displaying the detection result of the second oil content detection equipment, specifically, setting a first air pressure sensor at the exhaust end of the catalytic cleaner or the air inlet end of the second oil content detection equipment, starting the compressor after initial power-up, wherein the time when the first air pressure sensor detects the rated exhaust pressure of the compressor is recorded as t01, and the time when the display screen changes the display result of the second oil content detection equipment is recorded as t02, wherein t1=t02-t 01;
Step 2) setting time t2 for the compressed gas to be buffered in the buffer device according to the detection time t1 of the second oil content detection device, so that t2 is more than t1;
Step 3) designing and determining the structure of the buffer equipment according to the time t2 when compressed gas is required to be buffered in the buffer equipment, respectively setting a second air pressure sensor and a third air pressure sensor at the air inlet end and the air outlet end of the buffer equipment, starting the compressor after initial power-on, recording the time when the second air pressure sensor detects the rated air outlet pressure of the compressor as t03, recording the time when the third air pressure sensor detects the rated air outlet pressure of the compressor as t04, and designing and verifying the structure of the buffer equipment to enable t2 to be more than t1;
Step 4) mounting the second oil content detection equipment and the buffer equipment on an exhaust pipe of the catalytic purifier, so that the compressed gas is detected by the oil content detection equipment and then enters the buffer equipment for buffering;
Step 5) monitoring the display result of the display screen in real time, if the display result of the first oil content detection equipment is not out of standard, continuously supplying compressed gas to the catalytic purifier, otherwise immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the compressor has oil leakage fault; if the detection result of the second oil content detection device is not out of standard, connecting the exhaust end of the buffer device with the gas utilization device to enable the catalytic oilless compression system to supply gas to the gas utilization device, otherwise, cutting off the connection between the exhaust end of the buffer device and the gas utilization device to enable the catalytic oilless compression system to stop supplying gas to the gas utilization device; if the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device is not out of standard, continuously supplying compressed gas to the catalytic purifier, or immediately cutting off the supply of compressed gas to the catalytic purifier and judging that the catalyst in the catalytic purifier is overloaded.
2. The method for monitoring safe operation of a catalytic oilless compression system according to claim 1, wherein a buffer exhaust pipe is provided on the buffer device, the buffer device externally discharges compressed gas through the buffer exhaust pipe, an air supply pipe and an air exhaust pipe are provided on the buffer exhaust pipe, the air supply pipe is used for docking with and supplying air to the air utilization device, and the air exhaust pipe is used for discharging the compressed gas to the air; when the initial power-on and the display screen in the step 5) display that the detection result of the second oil content detection equipment exceeds the standard, the air supply pipe is closed, and the air exhaust pipe is opened; when the display screen in the step 5) shows that the detection result of the second oil content detection device is out of standard, the air supply pipe is opened, and the air exhaust pipe is closed.
3. The method for monitoring safe operation of a catalytic oilless compression system according to claim 1, wherein a catalytic converter is arranged at an air inlet end of the catalytic converter, a catalytic converter air inlet pipe and an empty exhaust pipe are arranged on the catalytic converter air inlet pipe, the catalytic converter air inlet pipe is used for introducing compressed gas into the catalytic converter, and the empty exhaust pipe is used for discharging the compressed gas empty; when the initial power-on and the display screen in the step 5) display that the detection result of the first oil content detection equipment exceeds the standard, the air inlet pipe of the catalyst is closed, and the empty calandria is opened; when the display screen in the step 5) shows that the detection result of the first oil content detection device does not exceed the standard, the air inlet pipe of the catalyst is opened, and the empty calandria is closed.
4. A method of monitoring the safe operation of a catalytic oil-free compression system as claimed in claim 3, wherein, when step
5) When the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device exceeds the standard, the air inlet pipe of the catalyst is closed, and the empty calandria is opened; when the display screen in the step 5) shows that the difference between the detection result of the first oil content detection device and the detection result of the second oil content detection device is not out of standard, the air inlet pipe of the catalyst is opened, and the air discharge pipe is closed.
5. The method for monitoring the safe operation of the catalytic oil-free compression system according to claim 1, wherein an alarm is further used, and in the step 5), when the display screen displays that the detection result of the first oil content detection device exceeds the standard or the detection result of the second oil content detection device exceeds the standard or the difference value between the two exceeds the standard, the alarm sounds and/or lights.
6. The method for monitoring the safe operation of the catalytic oilless compression system according to any one of claims 1 to 5, wherein the compressor adopts an oil-injection screw compressor, compressed gas discharged from the oil-injection screw compressor is sequentially passed through an oil-gas separator for separating oil in the compressed gas and a gas-liquid separator for separating liquid water in the compressed gas, and then is introduced into the catalytic cleaner.
7. The method for monitoring the safe operation of a catalytic oilless compression system according to claim 6, wherein the compressed gas discharged from the gas-liquid separator is passed through the heat exchanger before entering the catalytic converter, the compressed gas discharged from the catalytic converter is passed through the heat exchanger before passing through the buffer device, the heat exchanger performs heat recovery on the compressed gas discharged from the catalytic converter, and the compressed gas discharged from the gas-liquid separator is preheated.
8. The method for monitoring safe operation of a catalytic oilless compression system according to claim 7, wherein two tortuous U-shaped heat exchange pipelines are arranged in the heat exchanger, the two U-shaped heat exchange pipelines are arranged in a staggered mode, compressed gas discharged from the gas-liquid separator firstly passes through the first oil content detection device and then enters the catalytic purifier through one U-shaped heat exchange pipeline, compressed gas discharged from the catalytic purifier firstly passes through the second oil content detection device and then passes through the other U-shaped heat exchange pipeline and then is discharged to the outside, and the compressed gas is buffered and decelerated in the U-shaped heat exchange pipeline.
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| CN209475999U (en) * | 2018-10-30 | 2019-10-11 | 贝克欧净化科技南通有限公司 | A kind of compressed air degreasing unit |
| CN212717164U (en) * | 2020-07-17 | 2021-03-16 | 宁波鲍斯能源装备股份有限公司 | Oil-free compressor system for hydrogen fuel cell |
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| US7464543B2 (en) * | 2004-05-25 | 2008-12-16 | Cameron International Corporation | Two-stroke lean burn gas engine with a silencer/catalytic converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209475999U (en) * | 2018-10-30 | 2019-10-11 | 贝克欧净化科技南通有限公司 | A kind of compressed air degreasing unit |
| CN212717164U (en) * | 2020-07-17 | 2021-03-16 | 宁波鲍斯能源装备股份有限公司 | Oil-free compressor system for hydrogen fuel cell |
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