CN212254626U - Comprehensive detection device of molecular sieve oxygen generation system - Google Patents
Comprehensive detection device of molecular sieve oxygen generation system Download PDFInfo
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- CN212254626U CN212254626U CN202021822848.XU CN202021822848U CN212254626U CN 212254626 U CN212254626 U CN 212254626U CN 202021822848 U CN202021822848 U CN 202021822848U CN 212254626 U CN212254626 U CN 212254626U
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Abstract
The utility model discloses a comprehensive detection device of molecular sieve oxygen generation system, including being used for carrying out the comprehensive detection device that detects to oxygenerator host computer device, comprehensive detection device includes detection device, analytical control device, and detection device is connected to oxygenerator host computer device at least and is used for acquireing the detection information, and the detection information includes oxygen concentration information or pressure information; the analysis control device is connected with the detection information of the interaction detection device, and compares the detection information with preset calibration information to obtain comparison conclusion information. The utility model discloses the scheme is simple to use, and the reliability is high, and man-machine interaction ability is strong, has good reliability.
Description
Technical Field
The utility model belongs to the technical field of the oxygen generation equipment detects, concretely relates to comprehensive detection device of molecular sieve oxygen generation system.
Background
At normal temperature, a pressure swing adsorption process is adopted, and oxygen in the air is separated from nitrogen by using a molecular sieve, so that the oxygen is extracted. The principle is as follows: the oxygen generator is filled with molecular sieve, and can adsorb nitrogen in air when pressurizing, and the residual unabsorbed oxygen is collected and purified to obtain high-purity oxygen. The molecular sieve discharges the adsorbed nitrogen back to the ambient air during decompression, and can adsorb the nitrogen and prepare oxygen during next pressurization, and the whole process is a periodic dynamic circulation process without consumption of the molecular sieve.
Because the molecular sieve oxygen generation system has the characteristics of safety, energy conservation, convenient use and the like compared with liquid oxygen and bottled oxygen, the molecular sieve oxygen generation system is gradually popularized and particularly used in the fields of medical use, old-age care and the like in a large range.
The molecular sieve oxygen generation system is used for preparing oxygen by absorbing nitrogen in compressed air through a molecular sieve and then sending the oxygen to a pipeline for application, the molecular sieve is a key material in the whole system, and the molecular sieve is filled in an adsorption tower, so that the molecular sieve is very sensitive to water molecules, oil molecules and dust, and can cause non-renewable damage to the molecular sieve, and the sealing property of the adsorption tower plays a crucial role.
Conventional oxygen production system (general oxygen production)>3m3The air compressor adopted in the method/h) is a screw micro-oil air compressor, and oil content needs to be removed in a later period, so that the operation cost of the system is increased, and the hidden danger that oil molecules enter the system is also caused. The new generation molecular sieve oxygen generation system adopts a low-pressure oil-free adsorption process, namely, adopts a high-efficiency lithium type molecular sieve at the pressure of low adsorption pressure (less than or equal to 0.05MPa)The separation of nitrogen and oxygen is realized under force, in the desorption process, in order to better remove the nitrogen in the molecular sieve, a negative pressure system is required to be adopted to extract the adsorption tower, the internal pressure of the adsorption tower is negative, in this case, the adsorption tower needs to bear positive pressure and negative pressure for bidirectional sealing, the molecular sieve is damaged when air leakage exists in the assembly process, equipment failure is caused, and systematic detection needs to be carried out on the adsorption tower and host equipment in the assembly process.
The adsorption tower in the molecular sieve oxygen generation system needs to be strictly sealed, and the system can work abnormally or the molecular sieve can be damaged when the adsorption tower is not tightly sealed, for example, the adsorption pressure of the molecular sieve which cannot be reached inside the adsorption tower can cause the incomplete separation of nitrogen and oxygen when the positive pressure is not tightly sealed, the oxygen concentration is low, and compressed air is wasted. When negative pressure leaks air, unfiltered and dehumidified air can be sucked in, and the molecular sieve fails. The tightness test of the adsorption tower is one of the very critical operations.
When the existing pressure vessel such as the adsorption tower is used for testing the sealing performance, a water pressure and air pressure holding test is generally adopted, and the leakage performance of the sealed vessel is evaluated by testing the pressure attenuation for a period of time, or soapy water is coated on the sealed part, and the like. In the assembly process, considering the sensitivity of the molecular sieve in the adsorption tower to water, if soapy water is used for leakage detection during negative pressure test, the hidden danger that water enters the adsorption tower to pollute the molecular sieve exists, so that the adsorption tower cannot be used. When carrying out the pressurize test, because of the adsorption tower has two at least pipelines, air hole and oxygen hole promptly, one of them pipeline need be sealed respectively in the testing process, and the detection of positive pressure and negative pressure is carried out to another pipeline of rethread, and the detection achievement is complicated, and the manual operation is calculated complicacy, the measuring error that the manual operation produced appears easily. When the existing pressure maintaining test mode is used for carrying out positive pressure and negative pressure maintaining test, two times of pipe connection are needed, data are manually recorded, and the existing pipeline interface is abraded. The final result is greatly influenced by manual recording and debugging in the pressure maintaining process. Moreover, the performance of the adsorption tower filled with the molecular sieve cannot be pre-detected, the performance of a single adsorption tower cannot be detected before the whole machine is assembled, and the oxygen concentration and oxygen yield cannot meet the requirement due to improper filling of the molecular sieve, so that the oxygen concentration and oxygen yield can only be confirmed during the whole machine debugging, and the repair cost is too high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a molecular sieve system oxygen system comprehensive testing device has overcome the undulant big problem of prior art's manual work effectively, provides automatic control and equips to effectively realized the stable continuous production of oxygen making equipment.
The utility model discloses a comprehensive detection device of a molecular sieve oxygen generation system, which comprises a comprehensive detection device for detecting an oxygen generation host device (the oxygen generation host device can comprise adsorption towers and other devices used for separating air, such as an oxygen generation adsorption tower and the like), wherein the comprehensive detection device comprises a detection device and an analysis control device, the detection device is at least connected to the oxygen generation host device and is used for acquiring detection information, and the detection information comprises oxygen concentration information or pressure information;
the analysis control device is connected with the detection information of the interaction detection device, and compares the detection information with preset calibration information (the calibration information can be a set value of a user before detection) to obtain comparison conclusion information. The detection device can automatically finish the positive pressure and negative pressure sealing conditions of the adsorption tower after being connected with the adsorption tower to be detected, and analyze and judge the performance of the internal molecular sieve. And the analysis control device compares the detection information with a user set value so as to judge whether the adsorption tower and/or the internally filled molecular sieve meet the parameter requirements required by the loading machine.
The utility model discloses an improvement of molecular sieve oxygen generation system comprehensive testing device, detection device include oxygen concentration analysis appearance or pressure sensor.
The utility model discloses a molecular sieve system oxygen system comprehensive testing device's an improvement, the comparison that analysis and control device will detect information and calibration information and carry out includes, compares the pressure variation when reaching the pressurize behind the settlement pressure to system oxygen host computer device.
The utility model discloses an improvement of molecular sieve system oxygen system comprehensive testing device, analysis and control device is compared including when pressure surpasss the calibration information limit, the conclusion information of feedback warning to the pressure variation of system oxygen host computer device when the pressurize.
The utility model discloses a molecular sieve system oxygen system comprehensive testing device's an improvement, the comparison that analysis and control device will detect information and calibration information and carry out includes, compares the oxygen concentration change of system oxygen host computer device exhaust oxygen.
The utility model discloses an improvement of molecular sieve system oxygen system comprehensive testing device, analysis and control device compares the oxygen concentration change of system oxygen host computer device exhaust oxygen (product gas promptly, can be called oxygen product) and includes when oxygen concentration is less than the calibration information limit, the conclusion information of feedback warning.
The utility model discloses a molecular sieve system oxygen system comprehensive testing device's an improvement, molecular sieve system oxygen system comprehensive testing device still include alarm device, alarm device communication connection to analysis controlling means to implement the feedback according to the alarm information that conclusion information sent to analysis controlling means.
The utility model discloses an improvement of molecular sieve oxygen generation system comprehensive testing device, alarm device is including being used for implementing the display or warning light or the bee calling organ of feedback according to alarm information.
The utility model discloses an improvement of molecular sieve oxygen generation system comprehensive testing device, the display is touch screen liquid crystal display.
The utility model discloses a malleation, negative pressure system insert simultaneously, and the system carries out malleation and negative pressure detection to the adsorption tower according to the settlement time respectively automatically, can carry out the detection of oxygen content simultaneously to the adsorption tower after loading the molecular sieve, can ensure that there is not revealing of malleation, negative pressure in the adsorption tower that detects, and oxygen content reaches the specified value, can use in directly inserting the host system. The method has the advantages of simple use, high reliability, no human operation error and capability of recording the detection result into a product information system for storing as product data.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of one embodiment of the integrated test apparatus for molecular sieve oxygen generation system of the present application;
fig. 2 is a flow chart of the operation of the embodiment of fig. 1.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiments, and the structural, method, or functional changes made by those skilled in the art according to the embodiments are all included in the scope of the present invention.
The molecular sieve oxygen generation system comprehensive detection device is used for detecting the working performance of the molecular sieve oxygen generation system main machine device, mainly used for realizing the function of molecular sieve oxygen generation, and can comprise adsorption towers and other devices for separating air; an air compressor for providing compressed air can be further included in the equipment; a filter for filtering and removing impurities; a dryer such as a suction dryer for filtering out moisture in the compressed air; the device comprises a gas storage tank for storing compressed air as a raw material and an adsorption tower for oxygen separation; compressed air obtained by an air compressor sequentially passes through a filter, a suction drier and an air storage tank, passes through a control valve and then enters an adsorption tower for separation;
in order to achieve the purpose of the scheme, the comprehensive detection device is arranged in the scheme and comprises a detection device for detecting working conditions or signal states in an oxygen generation host device, and an analysis control device such as a PLC (programmable logic controller) and the like at least for analyzing or comparing detection information obtained by the detection device, wherein the detection device is at least connected to the oxygen generation host device and is used for obtaining the detection information, and the detection information comprises oxygen concentration information or pressure information; the detection device shown in fig. 1 may include an oxygen concentration analyzer or a pressure sensor, and the oxygen concentration analyzer may be connected to an oxygen evacuation valve of the adsorption tower, and is intended to monitor the oxygen content in the oxygen product after separation, so as to achieve the purpose of judging and monitoring the quality of the oxygen product. And the pressure sensor can be arranged on the adsorption tower and used for monitoring the air pressure in the tower, so that whether the separation work in the tower is normal or not is judged through the pressure change. In order to meet the judgment process, the analysis control device is connected with the detection information of the interaction detection device, and compares the detection information with preset calibration information to obtain comparison conclusion information. Of course, the comparison of the detection information and the calibration information by the analysis control device may include comparison of pressure change when the oxygen generation host device performs pressure maintaining after reaching the set pressure. At this time, the feedback made for the conclusion of the judgment may be that the comparison of the pressure change of the oxygen generation host device during pressure maintaining by the analysis control device includes the feedback of the conclusion information of the warning when the pressure exceeds the calibration information limit. The feedback may be such that the comparison of the detection information and the calibration information by the analysis control device includes comparison of a change in oxygen concentration of the oxygen gas discharged from the oxygen generation host device. Specifically, the analysis control device may compare the change in the oxygen concentration of the oxygen discharged from the oxygen generation host device with a change in the oxygen concentration of the oxygen discharged from the oxygen generation host device, and may feed back the warning conclusion information when the oxygen concentration is lower than the calibration information limit.
In order to realize the alarm process, the comprehensive detection device of the molecular sieve oxygen generation system can be further provided with an alarm device, the alarm device is in communication connection with the analysis control device, and the alarm device feeds back alarm information sent by the analysis control device according to the conclusion information. The alarm device comprises a display or a warning lamp or a buzzer for implementing feedback according to the alarm information. The display is a touch screen liquid crystal display.
In application, the comprehensive detection device comprises a detection device for detecting working conditions or signal states in the detection of the molecular sieve adsorption tower, and an analysis control device such as a PLC (programmable logic controller) and the like at least for analyzing or comparing detection information obtained by the detection device, wherein the detection device is connected with the adsorption tower to be detected and is used for obtaining detection information, and the detection information comprises oxygen concentration information and pressure information; the detection device shown in fig. 1 may include an oxygen concentration analyzer and a pressure sensor, and the oxygen concentration analyzer may be connected to an oxygen evacuation valve of the detection device, and is intended to monitor the oxygen content in the pressure release process, thereby achieving the purpose of monitoring and judging whether the molecular sieve filling process and the quality in the adsorption tower are qualified. And the pressure sensor is connected to the adsorption tower to be detected and is used for monitoring the air pressure in the adsorption tower to be detected, so that whether positive pressure air leakage exists in the adsorption tower or not is judged through pressure change. In order to meet the judgment process, the analysis control device is connected with the detection information of the interaction detection device, and compares the detection information with preset calibration information to obtain comparison conclusion information. Of course, the comparison of the detection information and the calibration information by the analysis control device may include comparison of a pressure change when the pressure of the adsorption tower is maintained after the pressure reaches the set pressure. At this time, the feedback made for the conclusion of the judgment may be that the analysis control means feeds back conclusion information of the warning when the pressure change ratio at the time of pressure holding of the adsorption tower under test includes that the pressure exceeds the calibration information limit. The feedback may be such that the comparison of the detection information and the calibration information by the analysis control device includes comparison of a change in oxygen concentration of the oxygen gas discharged from the adsorption tower under test. Specifically, the comparison of the change in the oxygen concentration of the oxygen gas discharged from the adsorption tower under test by the analysis control device may include feeding back the conclusion information of the warning when the oxygen concentration is lower than the limit of the calibration information.
As shown in fig. 1 and 2. The method comprises the steps of establishing a positive pressure system and a negative pressure system in the detection equipment, and arranging a detection system (an oxygen concentration analyzer and a pressure sensor), a data analysis system (a central processor) and an alarm system (a human-computer interface) in the detection equipment. Connecting an air inlet and an oxygen outlet to an adsorption tower to be tested, wherein the adsorption tower is provided with a molecular sieve, carrying out positive pressure pressurization, monitoring time, generating pressurization time data after reaching set pressure, closing an air compressor (compressor), entering a pressure maintaining state, monitoring pressure change within set time, immediately alarming when exceeding the pressure maintaining requirement, opening an exhaust valve when reaching preset time pressure and meeting the requirement, taking gas data from an exhaust valve tee joint by an oxygen concentration analyzer, monitoring oxygen concentration-time relation data in exhaust gas, and if the oxygen concentration fails to reach the set value and generates attenuation, determining that the molecular sieve is abnormal or the filling amount is too small, and entering the next step if the oxygen concentration is abnormal.
When the pressure sensor monitors that the pressure in the adsorption tower is reduced to 0, the evacuation valve finishes the pressure relief of the adsorption tower. At this time, the evacuation valve is closed, the control valve B is opened, and the vacuum pump is started to perform the negative pressure test. And after the set pressure is reached, the vacuum pump is stopped, an alarm can be given immediately when pressure leakage occurs in the pressure maintaining time, and after the pressure maintaining time is reached, the detection is passed after the pressure is qualified.
For ease of understanding, the following are simply examples:
before detection, a user sets the pressure maintaining time and the pressure according to the specification of the detection adsorption tower or calls out the existing formula. Connect the adsorption tower upper and lower tube to the utility model discloses on the upper and lower pipeline of equipment. The initiating device starts detecting. The first item is high pressure detection, the control valve A is opened, the control valve B and the emptying valve are closed, the air compressor and the matched air processing system are started, and compressed air is filled into the adsorption tower through the filter, the suction dryer, the air storage tank, the control valve A, the tee joint and the air inlet. The pressure sensor detects system pressure data from the tee joint A and transmits the system pressure data to the central processor, the system air leakage can be judged when the speed is too low in the pressurizing process, the blockage in the adsorption tower can be judged when the speed is too high, an alarm can be sent out immediately, and alarm information is sent out on a human-computer interface. When the preset pressure is reached, the air compressor is closed, the control valve A is closed, and the system enters a pressure maintaining state. And in the pressure maintaining process, the pressure sensor continuously detects the pressure change condition in the adsorption tower, and immediately gives an alarm after the pressure change condition exceeds a set value. And after the set time is reached, the positive pressure test that the pressure meets the set value is passed. At the moment, an emptying valve is opened, compressed gas in the adsorption tower is discharged into the air, a certain amount of gas is taken to an oxygen concentration analyzer to obtain oxygen concentration data in the exhaust gas, under the normal condition, the oxygen concentration is reduced along with the extension of the exhaust time and the pressure in the adsorption tower is reduced, the same similar oxygen concentration-evacuation time curve is required for the adsorption tower with the same specification, the oxygen concentration-evacuation time curve is output to a human-computer interface after being compared by a central processor such as a PLC, and if the oxygen concentration is reduced seriously, the operation abnormity of the molecular sieve of the adsorption tower is displayed on the human-computer interface, and the detection is stopped. If no abnormity exists, the emptying valve is closed after the pressure sensor detects that the system pressure is completely discharged. And (3) opening the control valve B, carrying out pressure maintaining detection on the negative pressure by the vacuum pump, similarly, comparing the recorded pressure reducing time with the data read by the pressure sensor by the central processor, and stopping detection immediately when the negative pressure is reduced to be slower than a normal value, and prompting that the negative pressure leakage exists in the system. And when the pressure sensor monitors that the negative pressure reaches a set value of the negative pressure maintaining pressure, closing the control valve B and the vacuum pump, and entering a negative pressure maintaining test stage. When the pressure attenuation is monitored to exceed the set value in the negative pressure maintaining stage, the system can immediately give an alarm on a human-computer interface and stop detection. If no abnormity occurs after the pressure maintaining time is reached, the human-computer interface prompts the detection passing information, and the system maintains the negative pressure state of the adsorption tower at the moment so as to protect the molecular sieve. When the detection adsorption tower needs to be detached, the system can open the control valve A, after the pressure in the balance adsorption tower reaches the atmospheric pressure, the man-machine interface prompts that the pipelines of the air inlet and the oxygen outlet can be detached after the adsorption tower can be detached. All testing steps are completed.
The positive pressure and the negative pressure adopted by the prior art are respectively used for pressure maintaining detection, and the air port of the other adsorption tower needs to be respectively plugged during detection, so that the installation is complex. And whether the adsorption tower has air leakage or not can not be judged in advance in the positive pressure and negative pressure pressurizing processes, the pressure needs to be confirmed after the pressure is maintained for a period of time, and the problems of long detection time and manual judgment are caused. After the positive pressure test is completed, whether the working state of the molecular sieve is normal or not cannot be monitored, and only the detection of the sealing performance of the adsorption tower is carried out.
Meanwhile, when positive pressure and negative pressure maintaining tests are carried out, after one work is finished, an installer is required to detach and install the equipment pipeline again, and manpower is wasted.
The technology is characterized in that the test equipment and the adsorption tower to be detected are installed at one time, and the comprehensive detection of the positive pressure, negative pressure tightness and molecular sieve performance of the adsorption tower can be automatically completed only by one-key operation after the installation. And the data adopts a real-time monitoring state in the detection process, and the data abnormity system immediately alarms. The existing detection scheme needs manual on-site confirmation, and the abnormity can not be found in time. The utility model discloses can promote by a wide margin and promote detection efficiency, can utilize non-operating time to detect the adsorption tower.
Further, the utility model discloses can report to the police through audible alarm mode, also can be connected central treater and remote communication unit etc. and report to the police through modes such as SMS, or the remote monitoring equipment detection condition.
1. The technology is a comprehensive detection method and a comprehensive detection device, can finish the detection of the positive pressure, negative pressure tightness and molecular sieve performance of the adsorption tower, and can finish the comprehensive detection of the adsorption tower through one-time connection.
2. The utility model discloses compare through the settlement data with the specification in the testing process, report to the police immediately when taking place unusually, need not wait for to confirm again in the specified time, practice thrift check-out time, raise the efficiency.
3. The utility model discloses can carry out preliminary performance to the molecular sieve in the adsorption tower and detect, can direct complete machine test after detecting, prevent that the molecular sieve from failing in time to discover the rework that needs to appear unusually, the redetection of positive negative pressure.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The comprehensive detection device of the molecular sieve oxygen generation system is characterized by comprising a comprehensive detection device for detecting an oxygen generation host device, wherein the comprehensive detection device comprises a detection device and an analysis control device,
the detection device is at least connected to the oxygen generation host device and used for acquiring detection information, and the detection information comprises oxygen concentration information or pressure information;
the analysis control device is connected with the detection information of the interaction detection device, and compares the detection information with preset calibration information to obtain comparison conclusion information.
2. The integrated detection device of the molecular sieve oxygen generation system of claim 1, wherein the detection device comprises an oxygen concentration analyzer or a pressure sensor.
3. The integrated detection device of molecular sieve oxygen generation system of claim 1, wherein the comparison of the detection information and the calibration information by the analysis control device comprises comparison of pressure change of the oxygen generation host device during pressure maintaining after reaching the set pressure.
4. The integrated detection device for the molecular sieve oxygen generation system according to claim 3, wherein the comparison of the pressure change of the oxygen generation host device during pressure maintaining by the analysis control device comprises the feedback of warning conclusion information when the pressure exceeds the calibration information limit.
5. The integrated detection device of molecular sieve oxygen generation system of claim 1, wherein the comparison of the detection information and the calibration information performed by the analysis control device comprises comparison of oxygen concentration variation of oxygen exhausted from the oxygen generation host device.
6. The integrated detection device for molecular sieve oxygen generation system according to claim 5, wherein the analysis control device compares the oxygen concentration change of the oxygen discharged from the oxygen generation host device and feeds back the conclusion information of the warning when the oxygen concentration is lower than the calibration information limit.
7. The comprehensive detection device of the molecular sieve oxygen generation system according to any one of claims 1 to 6, further comprising an alarm device, wherein the alarm device is communicatively connected to the analysis control device and feeds back alarm information sent by the analysis control device according to the conclusion information.
8. The integrated detection device of the molecular sieve oxygen generation system according to claim 7, wherein the alarm device comprises a display or a warning lamp or a buzzer for implementing feedback according to alarm information.
9. The integrated detection device of the molecular sieve oxygen generation system of claim 8, wherein the display is a touch screen liquid crystal display.
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