CN114669559A - On-line cleaning and sterilizing equipment for clean compressed air system - Google Patents

Abstract

The invention provides an online cleaning and sterilizing device for a clean compressed air system, wherein the clean compressed air system comprises an air compressor and an air storage tank connected with the air compressor, the online cleaning and sterilizing device comprises a cleaning device, a sterilizing device, a water discharging device, a storage tank water discharging pipeline, a gas return pipeline and a bypass pipeline, and a circulation loop can be formed among the storage tank water discharging pipeline, the bypass pipeline, the gas return pipeline, the cleaning device, the sterilizing device and the air storage tank. The pipeline of the clean compressed air system is set to be in closed cycle, and the clean compressed air system is cleaned and sterilized in a cycle mode through the cleaning device and the sterilization device, so that the labor intensity of operators can be reduced, and the cleaning and sterilization time can be saved.

Description

On-line cleaning and sterilizing equipment for clean compressed air system

Technical Field

The invention relates to a compressed air system, in particular to an online cleaning and sterilizing device for a clean compressed air system.

Background

The user now cleans the clean compressed air system by pasteurization. Namely purified water, a heat exchanger, steam, a storage tank, a pipeline valve, a thermometer, a water pump and other equipment. Firstly, the purified water is heated by steam through a heat exchanger (the purified water passes through the heat exchanger) and is injected into a storage tank (the temperature of the storage tank is not lower than 72 ℃). And (3) inputting water in the storage tank into a system pipeline and an air pressure storage tank by using a circulating water pump to clean the clean compressed air system.

Because the air pipeline of the clean compressed air system is used in a unidirectional way, each using point must be cleaned and drained when cleaning, a large amount of purified water and steam are needed, and the energy consumption is very large. In the clean process, need detect the clean degree of trunk line, current way is to detect each use point one by one, causes the operation inconvenient, and intensity of labour is big. In addition, an independent liquid storage tank is needed for cleaning the air pressure storage tank and used for storing heated purified water, and devices such as a pressure reducing valve, a safety valve, a condensation water discharging pipeline, a pipeline heat preservation device and the like are needed for steam on the heat exchanger, so that more equipment is needed, and the occupied area is large.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide an online cleaning and sterilizing apparatus for a clean compressed air system, which can comprehensively clean and sterilize the clean compressed air system.

In order to solve the technical problems, the invention provides an online cleaning and sterilizing device of a clean compressed air system, the clean compressed air system comprises an air compressor and an air storage tank connected with the air compressor,

the equipment comprises a cleaning device, a sterilizing device, a drainage device, a storage tank drainage pipeline, a gas return pipeline and a bypass pipeline,

One end of the storage tank drainage pipeline is connected with the lower portion of the gas storage tank, the other end of the storage tank drainage pipeline is connected with the drainage device and the bypass pipeline respectively, the gas return pipeline is connected with the bypass pipeline, the gas storage tank, the cleaning device and the sterilization device respectively, the cleaning device and the sterilization device are connected with the upper portion of the gas storage tank, and the storage tank drainage pipeline is connected with the bypass pipeline, the gas return pipeline, the cleaning device, the sterilization device and a circulation loop is formed between the gas storage tanks.

In one possible implementation, the cleaning device includes a purified water container, a purified water pipeline, an injection water container and an injection water pipeline;

the purified water pipeline comprises a purified water pipeline, a purified water main valve and a first control valve, an inlet of the purified water pipeline is connected with the purified water container, an outlet of the purified water pipeline is connected with the air storage tank, the purified water main valve and the first control valve are both arranged on the purified water pipeline, and the first control valve is positioned between the purified water main valve and the air storage tank;

the injection water pipeline comprises an injection water pipeline, an injection water main valve and a second control valve, an inlet of the injection water pipeline is connected with the injection water container, an outlet of the injection water pipeline is connected with the air storage tank, the injection water main valve and the second control valve are both arranged on the injection water pipeline, and the second control valve is positioned between the injection water main valve and the air storage tank.

In a possible implementation manner, the sterilization device includes a pure steam pipeline, a pure steam main valve, and a third control valve, an inlet of the pure steam pipeline is connected to a pure steam source, an outlet of the pure steam pipeline is connected to the gas storage tank, the pure steam main valve and the third control valve are both disposed on the pure steam pipeline, and the third control valve is located between the pure steam main valve and the gas storage tank.

In a feasible implementation manner, the air return pipeline comprises a first air return pipeline, a second air return pipeline, a first air return valve, a second air return valve, a third air return valve and a fourth air return valve,

the two ends of the first air return pipeline are respectively connected with one end of the air storage tank and one end of the second air return pipeline, the other end of the second air return pipeline is respectively connected with the pure steam pipeline, the injection water pipeline and the purified water pipeline, the joint between the second air return pipeline and the pure steam pipeline is positioned between the pure steam main valve and the third control valve, the joint between the second air return pipeline and the injection water pipeline is positioned between the injection water main valve and the second control valve, and the joint between the second air return pipeline and the purified water pipeline is positioned between the purified water main valve and the first control valve,

The first air return valve is arranged on the first air return pipeline, the second air return valve, the third air return valve and the fourth air return valve are all arranged on the second air return pipeline, the second air return valve is located between the pure steam pipeline and the second air return pipeline, the third air return valve is located between the pure steam pipeline and the injection water pipeline, and the fourth air return valve is located between the injection water pipeline and the purified water pipeline.

In a feasible implementation manner, the equipment further comprises a second bypass pipeline, one end of the second bypass pipeline is connected with the second air return pipeline, the other end of the second bypass pipeline extends out of the working space where the clean compressed air system is located, and a third bypass valve is arranged on the second bypass pipeline.

In a possible implementation, the gas return line further comprises at least one (point of use) U-shaped pipe, which is arranged on the second gas return pipe and is located between the first gas return valve and the second gas return valve; each U-shaped pipeline (use point) is connected with an air outlet pipeline, and an air outlet valve is arranged on each air outlet pipeline;

And a system air outlet valve is also arranged on the second air return pipeline and is positioned between the bypass pipeline and the U-shaped pipeline.

In a possible implementation manner, the bypass pipeline includes a first bypass pipeline, a first bypass valve, a second bypass valve, and a circulation pump, two ends of the first bypass pipeline are respectively connected to the storage tank drainage pipeline and the first return pipeline, the first bypass valve, the second bypass valve, and the circulation pump are all disposed on the first bypass pipeline, the second bypass valve is close to a connection between the first bypass pipeline and the first return pipeline, and the circulation pump is located between the first bypass valve and the second bypass valve.

In a possible implementation manner, the storage tank drainage pipeline includes a storage tank drainage pipeline and a main drainage valve, two ends of the storage tank drainage pipeline are respectively connected with the air storage tank and the first bypass pipeline, and the main drainage valve is arranged on the storage tank drainage pipeline;

drainage device includes drainage pipe and drain valve, drainage pipe with first bypass pipeline links to each other, the drain valve sets up on the drainage pipe.

In one possible implementation, the apparatus further comprises a wash liquor line,

the washing liquid pipeline comprises a washing liquid pipeline, a washing liquid tank, a liquid inlet valve and a liquid outlet valve; an inlet of the washing liquid pipeline is connected with a first bypass pipeline and is positioned between the storage tank water drainage pipeline and the first bypass valve, and an outlet of the washing liquid pipeline is connected with the first bypass pipeline and is positioned between the first bypass valve and the circulating pump; the washing liquid tank, the liquid inlet valve and the liquid outlet valve are all arranged on the washing liquid pipeline, and the washing liquid tank is positioned between the liquid inlet valve and the liquid outlet valve.

In a possible implementation manner, a pressure detection meter is further arranged on the first bypass pipeline, and the pressure detection meter is located between the circulating pump and the second bypass valve;

the drainage pipeline is further provided with a detection valve, a steam trap and a temperature detection meter, the detection valve is located between the drain valve and the drainage pipeline of the storage tank, the temperature detection meter is located between the drain valve and the detection valve, and the steam trap is arranged between the drain valve and an outlet of the drainage pipeline.

The implementation of the invention has the following beneficial effects:

The invention provides an online cleaning and sterilizing device for a clean compressed air system, wherein the clean compressed air system comprises an air compressor and an air storage tank connected with the air compressor, the online cleaning and sterilizing device comprises a cleaning device, a sterilizing device, a water discharging device, a storage tank water discharging pipeline, a gas return pipeline and a bypass pipeline, and a circulation loop is formed among the storage tank water discharging pipeline, the bypass pipeline, the gas return pipeline, the cleaning device, the sterilizing device and the air storage tank. The pipeline of the clean compressed air system is set to be in closed cycle, and the clean compressed air system can be cleaned and sterilized circularly through the cleaning device and the sterilizing device, so that the labor intensity of operators is reduced, the cleaning and sterilizing time is saved, and the energy is saved.

Drawings

FIG. 1 is a schematic structural diagram of an on-line cleaning and sterilizing apparatus for a clean compressed air system according to an embodiment of the present invention;

FIG. 2 is a schematic flow diagram of compressed air provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a cycle of a cleaning solution in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating the circulation of purified water and injected water in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a steam cycle in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention.

Reference numerals in the drawings:

10-purified water container, 11-purified water pipeline, 12-purified water main valve, 13-first control valve,

20-a water injection container, 21-a water injection pipeline, 22-a main water injection valve, 23-a second control valve,

30-pure steam pipeline, 31-pure steam three-way valve, 32-third control valve, 33-pure steam main valve,

40-a first air return pipeline, 41-a second air return pipeline, 42-a first air return valve, 43-a second air return valve, 44-a third air return valve, 45-a fourth air return valve, 46-a U-shaped pipeline, 47-an air outlet pipeline and 48-an air outlet valve; 49-a system gas outlet valve,

50-a first bypass pipe, 51-a first bypass valve, 52-a second bypass valve, 53-a circulation pump, 54-a pressure detection gauge,

60-a storage tank drainage pipeline, 61-a main drainage valve,

70-drainage pipeline, 71-drainage valve, 72-temperature detecting meter, 73-steam trap, 74-detecting valve,

80-washing liquid pipeline, 81-washing liquid tank, 82-liquid inlet valve and 83-liquid outlet valve;

90-an air compressor, 91-an air storage tank, 92-an air inlet pipeline and 93-an air inlet valve;

100-a second bypass conduit, 101-a third bypass valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the invention provides an online cleaning and sterilizing device for a clean compressed air system, which is used for comprehensively cleaning and sterilizing the clean compressed air system.

The clean compressed air system can include air compressor 90, gas holder 91 and admission line 92, air compressor 90 and gas holder 91 are connected respectively to the both ends of admission line 92, still be equipped with admission valve 93 on the admission line 92, air compressor 90 is used for processing atmospheric pressure's air compression into compressed air, gas holder 91 is used for storing compressed air, admission valve 93 is the check valve, when air compressor 90 opens, admission valve 93 opens, make compressed air get into gas holder 91 from air compressor 90, when air compressor 90 closed, admission valve 93 closes to prevent compressed air reverse flow.

Referring to fig. 1, the on-line cleaning and sterilizing apparatus may include a cleaning device, a sterilizing device, a draining device, a storage tank drain line, a gas return line, and a bypass line. One end of the storage tank drainage pipeline with the sub-unit connection of the gas storage tank 91, the other end of the storage tank drainage pipeline respectively with the drainage device with the bypass pipeline is connected, the gas return pipeline respectively with the bypass pipeline the gas storage tank 91 the cleaning device with sterilization device is connected, cleaning device and sterilization device all with the upper portion of the gas storage tank 91 is connected, the storage tank drainage pipeline the bypass pipeline the gas return pipeline cleaning device the sterilization device and constitute circulation loop between the gas storage tank 91.

The components of the online cleaning and sterilizing apparatus will be described below.

The washing apparatus includes a purified water container 10, a purified water line, an injection water container 20, and an injection water line. The purified water pipeline comprises a purified water pipeline 11, a purified water main valve 12 and a first control valve 13, an inlet of the purified water pipeline 11 is connected with the purified water container 10, an outlet of the purified water pipeline 11 is connected with the air storage tank 91, the purified water main valve 12 and the first control valve 13 are both arranged on the purified water pipeline 11, and the first control valve 13 is located between the purified water main valve 12 and the air storage tank 91. The injection water pipeline comprises an injection water pipeline 21, an injection water main valve 22 and a second control valve 23, wherein an inlet of the injection water pipeline 21 is connected with the injection water container 20, an outlet of the injection water pipeline 21 is connected with the air storage tank 91, the injection water main valve 22 and the second control valve 23 are both arranged on the injection water pipeline 21, and the second control valve 23 is positioned between the injection water main valve 22 and the air storage tank 91.

The sterilization device comprises a pure steam line 30, a pure steam main valve 33 and a third control valve 32. An inlet of the pure steam pipeline 30 is connected with a pure steam source, an outlet of the pure steam pipeline 30 is connected with the air storage tank 91, the pure steam main valve 33 and the third control valve 32 are both arranged on the pure steam pipeline 30, and the third control valve 32 is positioned between the pure steam main valve 33 and the air storage tank 91.

The bypass line includes a first bypass duct 50, a first bypass valve 51, a second bypass valve 52, and a circulation pump 53. Both ends of the first bypass pipe 50 are connected to the tank drain line and the first return air pipe 40, respectively, the first bypass valve 51, the second bypass valve 52 and the circulation pump 53 are disposed on the first bypass pipe 50, the second bypass valve 52 is close to a connection between the first bypass pipe 50 and the first return air pipe 40, and the circulation pump 53 is located between the first bypass valve 51 and the second bypass valve 52. A pressure detection gauge 54 is further provided in the first bypass line 50, and the pressure detection gauge 54 is located between the circulation pump 53 and the second bypass valve 52.

The air return pipeline comprises a first air return pipeline 40, a second air return pipeline 41, a first air return valve 42, a second air return valve 43, a third air return valve 44, a fourth air return valve 45, a system air outlet valve 49 and at least one U-shaped pipeline 46, wherein each U-shaped pipeline is a use point. The two ends of the first air return pipeline 40 are respectively connected with the air storage tank 91 and one end of the second air return pipeline 41, the other end of the second air return pipeline 41 is respectively connected with the pure steam pipeline 30, the injection water pipeline 21 and the purified water pipeline 11, the connection between the second air return pipeline 41 and the pure steam pipeline 30 is located between the pure steam main valve 33 and the third control valve 32, the connection between the second air return pipeline 41 and the injection water pipeline 21 is located between the injection water main valve 22 and the second control valve 23, and the connection between the second air return pipeline 41 and the purified water pipeline 11 is located between the purified water main valve 12 and the first control valve 13. The first air return valve 42 is disposed on the first air return pipeline 40, the second air return valve 43, the third air return valve 44 and the fourth air return valve 45 are disposed on the second air return pipeline 41, the second air return valve 43 is located between the pure steam pipeline 30 and the first air return valve 42, the third air return valve 44 is located between the pure steam pipeline 30 and the injection water pipeline 21, and the fourth air return valve 45 is located between the injection water pipeline 21 and the purified water pipeline 11. The at least one (point of use) U-shaped conduit 46 is disposed on the second air return conduit 41 and between the first air return valve 42 and the second air return valve 43; an air outlet pipeline 47 is connected to each U-shaped pipeline 46 (using point), and an air outlet valve 48 is arranged on each air outlet pipeline 47. The system outlet valve 49 is located between the first bypass line 50 and the U-shaped pipe.

The storage tank drainage pipeline comprises a storage tank drainage pipeline 60 and a main drainage valve 61, two ends of the storage tank drainage pipeline 60 are respectively connected with the air storage tank 91 and the first bypass pipeline 50, and the main drainage valve 61 is arranged on the storage tank drainage pipeline 60. The drainage device comprises a drainage pipeline 70, a drainage valve 71, a detection valve 74, a steam trap 73 and a temperature detection meter 72, wherein the drainage pipeline 70 is connected with the first bypass pipeline 50, the drainage valve 71 is arranged on the drainage pipeline 70, and the drainage valve 71 can be a stop valve; the detection valve 74 is located between the drain valve 71 and the storage tank drain pipeline 60, the temperature detection gauge 72 is located between the drain valve 71 and the detection valve 74, and the steam trap 73 is disposed between the drain valve 71 and the outlet of the drain pipeline.

In one possible implementation, the apparatus may further comprise a wash liquid line. The washing liquid pipeline comprises a washing liquid pipeline 80, a washing liquid tank 81, a liquid inlet valve 82 and a liquid outlet valve 83. The inlet of the washing liquid pipeline 80 is connected with a first bypass pipeline and is positioned between the storage tank water drainage pipeline and the first bypass valve, and the outlet of the washing liquid pipeline 80 is connected with the first bypass pipeline and is positioned between the first bypass valve 51 and the circulating pump 53. The washing liquid tank 81, the liquid inlet valve 82 and the liquid outlet valve 83 are all arranged on the washing liquid pipeline 80, the liquid inlet valve 82 is close to the drain valve 61, and the washing liquid tank 81 is located between the liquid inlet valve 82 and the liquid outlet valve 83. Specifically, the washing liquid tank 81 is used for containing a washing agent, such as alkali or lye.

In a possible implementation manner, the apparatus may further include a second bypass pipeline 100, one end of the second bypass pipeline 100 is connected to the second return air pipeline 41, and the other end of the second bypass pipeline 100 extends out of the working space where the clean compressed air system is located, and a third bypass valve 101 is disposed on the second bypass pipeline 100. The working space of the clean compressed air system needs to be kept in a clean environment, and the discharge of clean waste water is easy to cause pollution.

Fig. 2 is a schematic flow diagram of compressed air provided by an embodiment of the present invention. Referring to fig. 2, the air compressor 90 is turned on, the air inlet valve 93, the first air return valve 42, the system air outlet valve 49, the second air return valve 43 and the third control valve 32 are opened, the first control valve 13, the second control valve 23, the third air return valve 44, the pure steam three-way valve 31, the liquid inlet valve 82, the first bypass valve 51, the second bypass valve 52 and the third bypass valve 101 are closed, the air storage tank 91, the first air return pipeline 40 and the second air return pipeline 41 are communicated with a part of the pure steam pipeline 30, the compressed air produced by the air compressor 90 enters the air storage tank 91 through the air inlet pipeline 92, the compressed air in the air storage tank 91 enters the first air return pipeline 40 and the second air return pipeline 41, since the second air return pipeline 41 is connected with a plurality of (using points) U-shaped pipelines 46, each (using point) U-shaped pipeline 46 is connected with the air outlet pipeline 47, and the compressed air can be taken out by opening the air outlet valve 48 on the air outlet pipeline 47, when compressed air is not needed, the air outlet valve 48 is closed.

Fig. 3 is a schematic diagram illustrating a cycle of a cleaning solution in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention. Referring to FIG. 3, which shows the flow path of the washing liquid in the apparatus, alkali or alkaline liquid is added to a washing liquid tank 81, a purified water main valve 12, a first control valve 13, a liquid inlet valve 82 and a liquid outlet valve 83 are opened to allow a water discharge main valve 61 to communicate with a washing liquid pipe 80, a second bypass valve 52, a first air return valve 42, a system gas outlet valve 49, a second air return valve 43 and a third control valve 32 are opened to allow purified water to be injected into a gas storage tank 91 through a purified water pipe 11, a first bypass valve 51 is closed, a water discharge valve 71 is closed, and then the purified water enters the washing liquid tank 81 through the washing liquid pipe 80 to be mixed with the alkali or alkaline liquid in the washing liquid tank 81, the mixed alkaline liquid is fed into a first bypass pipe 50 by a circulation pump 53, a part of the purified water enters the gas storage tank 91 from a first air return pipe 40, a part of the purified water enters the gas storage tank 91 from the second air return pipe 41 and a pure steam pipe 30, and the gas storage tank 91 is fed into the gas storage tank 91 through the gas storage tank 91 and the washing liquid pipe 80, The wash liquid is circulated between the first bypass duct 50, the first return air duct 40, the second return air duct 41 and the pure steam duct 30. Then, the purified water main valve 12, the first control valve 13 and the liquid inlet valve 82 are closed, and the first bypass valve 51 is opened, so that the alkali liquor circulates among the air storage tank 91, the first bypass pipeline 50, the first air return pipeline 40, the second air return pipeline 41 and the pure steam pipeline 30, and the pipelines and the air storage tank 91 passing through are cleaned. In one possible implementation, the system outlet valve 49 and the third control valve 32 may be closed to circulate the lye between the storage tank 91, the storage tank drain line 60, the first bypass line 50 and the first return line 40. In another possible implementation, the first air return valve 42 may be closed, allowing the lye to circulate between the gas holder 91, the storage tank water drain 60, the first bypass line 50, the second air return line 41 and the pure steam line 30.

Fig. 4 is a schematic diagram illustrating the circulation of purified water and injection water in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention. Referring to fig. 4, the flow paths of the purified water and the injected water in the apparatus are shown. The cleaning process of the system comprises the following steps: the cleaning is carried out by purified water and then by injection water. Firstly, opening a purified water main valve 12, a first control valve 13, a liquid inlet valve 82 and a liquid outlet valve 83, enabling a water discharge main valve 61 to be communicated with a washing liquid pipeline 80, enabling purified water to enter a gas storage tank 91 through a purified water pipeline 11, opening the control water discharge main valve 61, enabling a first bypass pipeline 50 and a storage tank water discharge pipeline 60 to be communicated, opening a first bypass valve 51, a second bypass valve 52, a first gas return valve 42, a second gas return valve 43, a system gas outlet valve 49 and a third control valve 32, closing a water discharge valve 71, a pure steam three-way valve 31, a third gas return valve 44 and a third bypass valve 101, enabling a washing liquid of the purified water in the gas storage tank 91 to enter the first bypass pipeline 50, enabling a part of the washing liquid to enter the gas storage tank 91 from the first gas return pipeline 40 and another part of the washing liquid to enter the gas storage tank 91 from the second gas return pipeline 41 and the pure steam pipeline 30 under the action of a circulating pump 53, and enabling the washing liquid to enter the gas storage tank 91 from the gas storage tank 91 and the first bypass pipeline 50, The first air return pipeline 40, the second air return pipeline 41 and the pure steam pipeline 30 are circulated, and the first air return pipeline 40, the second air return pipeline 41 and the air storage tank 91 are fully cleaned. During the cleaning, when the required amount of purified water to be injected is reached, the purified water main valve 12 may be temporarily closed. After the system is circulated for a prescribed time, the first bypass valve 51 and the intake valve 82 are closed. The purified water is drained by opening the drain valve 71. Opening a main injection water valve 22 and a second control valve 23 to enable injection water to enter a gas storage tank 91 through an injection water pipeline 21, opening a main control drainage valve 61 to connect a first bypass pipeline 50 and a storage tank drainage pipeline 60, opening a first bypass valve 51, a second bypass valve 52, a first air return valve 42, a second air return valve 43, a system air outlet valve 49 and a third control valve 32, closing a drainage valve 71, an air inlet valve 82, an air outlet valve 83, a fourth air return valve 45, a pure steam three-way valve 31 and a third bypass valve 101 to enable cleaning liquid of the injection water in the gas storage tank 91 to enter the first bypass pipeline 50, and enabling the injected injection water to be circulated in the gas storage tank 91 and the first air return pipeline and the second air return pipeline for multiple times under the action of a circulating pump 53. In addition, the air outlet valve 48 can be opened, cleaning liquid is taken from the U-shaped pipeline 46, the pure steam tee joint 31, the third bypass valve 101 and the detection valve 74 for detection, and when the data to be detected meet the required cleaning index, the cleaning is stopped, and the cleaning liquid is discharged. In the system, the cleaning liquid in the U-shaped pipeline 46 (at the use point) can be discharged by opening the air outlet valve 48 on the air outlet pipeline 47, and the cleaning liquid in the storage tank can be discharged from the U-shaped pipeline 46 (at the use point) under the combined action of the circulating pump 53; the drain valve 71 may be opened and the third bypass valve 101 may be opened to perform draining. The cleaning liquid is discharged through the water discharge line 70; further alternatively, the gas outlet valve 48 and the drain valve 71 are opened simultaneously, thereby accelerating the discharge efficiency of the cleaning liquid. If the gas container 91 and the pipeline need to be cleaned many times by using purified water and injection water, the above steps are repeated.

Fig. 5 is a schematic view illustrating a steam cycle in an on-line cleaning and sterilizing apparatus of a clean compressed air system according to an embodiment of the present invention. Referring to fig. 5, the flow path of the pure steam in the apparatus is shown. Opening a main control water drainage valve 61 to connect a storage tank water drainage pipeline 60 with a first bypass pipeline 50, opening a first bypass valve 51, a second bypass valve 52, a first air return valve 42, a system air outlet valve 49, a second air return valve 43, a third air return valve 44, a fourth air return valve 45, a first control valve 13, a second control valve 23, a third control valve 32, a pure steam main valve 33 and a pure steam three-way valve 31 to form a pure steam circulation loop among an air storage tank 91, the first bypass pipeline 50, a first air return pipeline 40, a second air return pipeline 41, a purified water pipeline 11, an injection 21 and a pure steam pipeline 30, opening a drain valve 71 to enable pure steam provided by a pure steam source to enter the air storage tank 91 to sterilize the air storage tank 91, then enter the first bypass pipeline 50 through the storage tank water drainage pipeline 60, and enable a part of the pure steam entering the first bypass pipeline 50 to enter the air storage tank 91 from the first air return pipeline 40, the other part of the pure steam enters the gas storage tank 91 from the second gas return pipeline 41, the purified water pipeline 11, the injection water pipeline 21 and the pure steam pipeline 30, and the pipeline on the path and the gas storage tank 91 are sterilized by the pure steam. The drain pipe 70 is further provided with a steam trap 73, if condensed water is generated in the air storage tank 91, the condensed water can enter the drain pipe 70 along the storage tank drain pipe 60, when the condensed water exists in the drain pipe 70 and the drain valve 71 is in an open state, a valve of the steam trap is automatically opened to discharge the condensed water, and when the condensed water does not exist in the drain pipe 70, the valve of the steam trap is automatically closed, so that pure steam circulation is not affected.

In the above description of fig. 3-5, the air container, the first air return line 40 and the second air return line 41 are simultaneously cleaned and sterilized by simultaneously opening the first air return valve 42 and the second air return valve 43. In one possible implementation, the air tank 91 may also be cleaned separately; the difference from the embodiment shown in fig. 3-5 is that when the air storage tank 91 needs to be cleaned and sterilized separately, the second air return valve 43 and the system air outlet valve 49 are closed, so that the alkali liquor, the cleaning solution or the steam forms a closed loop among the air storage tank 91, the first bypass pipeline 50 and the first air return pipeline 40, so as to clean the air storage tank 91. In another possible implementation, the air storage tank 91 and the second air return pipeline may also be cleaned and sterilized; the difference from the embodiments shown in fig. 3-5 is that the first air return valve 42 needs to be closed, so that the alkali liquor, the cleaning solution or the steam forms a closed loop circulation among the air storage tank 91, the first bypass pipeline 50 and the second air return pipeline 41, thereby cleaning and sterilizing the air storage tank 91 and the second air return pipeline 41.

The cleaning and sterilization steps of the clean compressed air system will be described in detail below.

The method for cleaning and sterilizing the gas storage tank comprises the following steps:

Opening a purified water main valve 12 and a first control valve 13 to enable purified water to enter an air storage tank 91 through a purified water pipeline 11, controlling a water discharge main valve 61 to be communicated with a first bypass pipeline 50 and a storage tank water discharge pipeline 60, opening a liquid inlet valve 82, a liquid outlet valve 83, a second bypass valve 52 and a first air return valve 42, closing a water discharge valve 71, a first bypass valve 51 and a system air outlet valve 49 to enable alkali liquor obtained by mixing purified water in the air storage tank 91 and alkali in a washing liquor tank 81 to enter the first bypass pipeline 50, and enabling the alkali liquor to enter the air storage tank 91 from a first air return pipeline 40 under the action of a circulating pump 53. After detecting that the concentration of the alkali liquor in the gas storage tank 91 meets the requirement, the purified water main valve 12, the first control valve 13, the liquid inlet valve 82 and the liquid outlet valve 83 are closed, the first bypass valve 51 is opened for circular cleaning, and after a predetermined time (about ten minutes) of cleaning, the drain valve 71 is opened to drain the alkali liquor, for example, into a container.

Closing the purified water main valve 12, the first control valve 13 and the drain valve 71, opening the injection water main valve 22 and the second control valve 23 to enable the injection water to enter the air storage tank 91 through the injection water pipeline 21, closing the liquid inlet valve 82 and the liquid outlet valve 83, opening the first bypass valve 51 for circular cleaning, performing circular cleaning on the air storage tank 91, the first bypass pipeline 50 and the first air return pipeline 40, closing the injection water main valve 22 and the second control valve 23 after passing detection, opening the drain valve 71 to drain the injection water, for example, into a container.

And opening the pure steam main valve 33, the pure steam three-way valve 31 and the third control valve 32, and closing the second air return valve 43, the third air return valve 44, the first air return valve 42, the liquid inlet valve 82 and the first bypass valve 51 to enable the pure steam to enter the air storage tank 91. When the pure steam enters the gas storage tank 91, the main water drainage valve 61 and the water drainage valve 71 are opened, the temperature is detected by the temperature detection meter 72 to reach 121 ℃, then the temperature is maintained for 30 minutes, and then the pure steam is drained to finish the cleaning and the sterilization of the storage tank.

Secondly, the storage tank, the pipeline and the system are cleaned and sterilized, which comprises the following steps:

firstly, a purified water main valve 12 and a first control valve 13 are opened to enable purified water to enter a gas storage tank 91 through a purified water pipeline 11, a control water discharge main valve 61 is communicated with a first bypass pipeline 50 and a storage tank water discharge pipeline 60, a water discharge valve 71, a first bypass valve 51, a third air return valve 44, a pure steam three-way valve 31, a third bypass valve 101 and a first air return valve 42 are closed, a liquid inlet valve 82, a liquid outlet valve 83, a second bypass valve 52, a system gas outlet valve 49, a second air return valve 43 and a third control valve 32 are opened, so that alkali liquor obtained by mixing purified water in the gas storage tank 91 and alkali in a washing liquor tank 81 enters the first bypass pipeline 50, and under the action of a circulating pump 53, the alkali liquor enters (using point) a U-shaped pipeline 46, a second air return pipeline 41 and a gas storage tank 91 from the first bypass pipeline 50 to clean a pipeline system. After detecting that the concentration of the alkali liquor in the gas storage tank 91 meets the requirement, the purified water main valve 12, the first control valve 13, the liquid inlet valve 82 and the liquid outlet valve 83 are closed, the first bypass valve 51 is opened for circular cleaning, and after a preset cleaning time (for example, ten minutes), the drain valve 71 is opened to drain the alkali liquor, for example, into a container.

And opening the injection water main valve 22 and the second control valve 23 to enable the injection water to enter the air storage tank 91 through the injection water pipeline 21, opening the first bypass valve 51 to enable the injection water to be circularly cleaned among the air storage tank 91, the storage tank water drainage pipeline 60, the first bypass pipeline 50, the second air return pipeline 41 and the pure steam pipeline 30, and draining the injection water after the injection water is detected to be qualified, for example, discharging the injection water into a container.

Then, the third air return valve 44, the third control valve 32, the second bypass valve 52, and the drain valve 71 are kept closed, and the pure steam main valve 33, the pure steam three-way valve 31, the second air return valve 43, and the first air return valve 42 are opened, so that the pure steam is introduced into the second air return pipe 41, the (point-of-use) U-shaped pipe 46, the system air outlet valve 49, the first air return pipe 40, and the air tank 91. After the pure steam enters the gas storage tank 91, the drain valve 71 is opened to a smaller opening degree, the temperature detection table 72 is used for temperature detection, the temperature detection table 72 is used for detecting that the temperature reaches 121 ℃, then the temperature is kept for 30 minutes, and then the pure steam is discharged, so that the cleaning and the sterilization of the pipeline and the gas storage tank are completed. The purified water and the injection water pipeline can also be sterilized, the second air return valve 43 and the third control valve 32 are closed, the main injection water valve 22 and the main purified water valve 12 are closed, when the injection water pipeline is sterilized, the first control valve 13 and the fourth air return valve 45 of the purified water pipeline are closed, the main pure steam valve 33, the three-way pure steam valve 31, the third air return valve 44 and the second control valve 23 are opened, so that the pure steam enters the injection water pipeline 21 and the air storage tank, and the injection water pipeline is sterilized and disinfected. When the purified water pipeline is sterilized, the injection water main valve 22 and the purified water main valve 12 are closed, the second air return valve 43, the third control valve 32 and the second control valve 23 are closed, the pure steam main valve 33, the pure steam three-way valve 31, the third air return valve 44 and the fourth air return valve 45 are opened, and the purified water pipeline 11 and the air storage tank are sterilized and disinfected. If the storage tank does not need to be sterilized, the third air return valve 44, the third control valve 32, the first air return valve 42 and the main water drainage valve 61 are kept closed, the pure steam main valve 33, the pure steam three-way valve 31 and the second air return valve 43 are opened, pure steam enters the second air return valve 43, the second air return pipeline 41, the (using point) U-shaped pipeline 46, the system air outlet valve 49, the second bypass valve 52, the first bypass pipeline 50, the first bypass valve 51 and the water drainage pipeline 70 system, the water drainage valve 71 is opened to a smaller opening degree, the temperature detection table 72 is used for temperature detection, when the temperature of the temperature detection table 72 reaches 121 ℃, the temperature is kept for 30 minutes, then the pure steam is drained, and the pipeline sterilization is completed.

The embodiment of the invention sets the pipeline of the clean compressed air system as closed cycle, and can circularly clean and sterilize the clean compressed air system through the cleaning device and the sterilization device, thereby reducing the labor intensity of operators, saving the cleaning and sterilization time and saving energy.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An on-line cleaning and sterilizing device of a clean compressed air system, the clean compressed air system comprises an air compressor and an air storage tank connected with the air compressor, and is characterized in that,

The equipment comprises a cleaning device, a sterilizing device, a drainage device, a storage tank drainage pipeline, a gas return pipeline and a bypass pipeline,

one end of the storage tank drainage pipeline is connected with the lower portion of the gas storage tank, the other end of the storage tank drainage pipeline is connected with the drainage device and the bypass pipeline respectively, the gas return pipeline is connected with the bypass pipeline, the gas storage tank, the cleaning device and the sterilization device respectively, the cleaning device and the sterilization device are connected with the upper portion of the gas storage tank, and a circulation loop is formed among the storage tank drainage pipeline, the bypass pipeline, the gas return pipeline, the cleaning device, the sterilization device and the gas storage tank.

2. The apparatus according to claim 1, wherein the washing device comprises a purified water container, a purified water line, an injection water container, and an injection water line;

the purified water pipeline comprises a purified water pipeline, a purified water main valve and a first control valve, an inlet of the purified water pipeline is connected with the purified water container, an outlet of the purified water pipeline is connected with the air storage tank, the purified water main valve and the first control valve are both arranged on the purified water pipeline, and the first control valve is positioned between the purified water main valve and the air storage tank;

The injection water pipeline comprises an injection water pipeline, an injection water main valve and a second control valve, an inlet of the injection water pipeline is connected with the injection water container, an outlet of the injection water pipeline is connected with the air storage tank, the injection water main valve and the second control valve are both arranged on the injection water pipeline, and the second control valve is located between the injection water main valve and the air storage tank.

3. The apparatus of claim 2, wherein the sterilizing device comprises a pure steam pipeline, a pure steam main valve and a third control valve, wherein an inlet of the pure steam pipeline is connected with a pure steam source, an outlet of the pure steam pipeline is connected with the air storage tank, the pure steam main valve and the third control valve are both arranged on the pure steam pipeline, and the third control valve is positioned between the pure steam main valve and the air storage tank.

4. The apparatus of claim 3, wherein the air return line comprises a first air return line, a second air return line, a first air return valve, a second air return valve, a third air return valve, and a fourth air return valve,

the two ends of the first air return pipeline are respectively connected with the air storage tank and one end of the second air return pipeline, the other end of the second air return pipeline is respectively connected with the pure steam pipeline, the injection water pipeline and the purified water pipeline, the joint between the second air return pipeline and the pure steam pipeline is positioned between the pure steam main valve and the third control valve, the joint between the second air return pipeline and the injection water pipeline is positioned between the injection water main valve and the second control valve, and the joint between the second air return pipeline and the purified water pipeline is positioned between the purified water main valve and the first control valve,

The first air return valve is arranged on the first air return pipeline, the second air return valve, the third air return valve and the fourth air return valve are all arranged on the second air return pipeline, the second air return valve is located between the pure steam pipeline and the second air return pipeline, the third air return valve is located between the pure steam pipeline and the injection water pipeline, and the fourth air return valve is located between the injection water pipeline and the purified water pipeline.

5. The apparatus of claim 4, further comprising a second bypass pipeline, wherein one end of the second bypass pipeline is connected to the second return air pipeline, and the other end of the second bypass pipeline extends out of the working space where the clean compressed air system is located, and a third bypass valve is disposed on the second bypass pipeline.

6. The apparatus of claim 4, wherein the air return line further comprises at least one U-shaped pipe disposed on the second air return pipe and between the first air return valve and the second air return valve; each U-shaped pipeline is connected with an air outlet pipeline, and an air outlet valve is arranged on each air outlet pipeline;

And a system air outlet valve is also arranged on the second air return pipeline and is positioned between the bypass pipeline and the U-shaped pipeline.

7. The apparatus of claim 6, wherein the bypass line comprises a first bypass line, a first bypass valve, a second bypass valve, and a circulation pump, wherein the first bypass line is connected at each end to the tank drain line and the first return line, wherein the first bypass valve, the second bypass valve, and the circulation pump are all disposed on the first bypass line, and wherein the second bypass valve is located proximate to a junction of the first bypass line and the first return line, and wherein the circulation pump is located between the first bypass valve and the second bypass valve.

8. The apparatus as claimed in claim 7, wherein said storage tank drain line includes a storage tank drain line having both ends connected to said air storage tank and said first bypass line, respectively, and a main drain valve provided on said storage tank drain line;

the drainage device comprises a drainage pipeline and a drainage valve, the drainage pipeline is connected with the first bypass pipeline, and the drainage valve is arranged on the drainage pipeline.

9. The apparatus of claim 8, further comprising a wash liquor line,

the washing liquid pipeline comprises a washing liquid pipeline, a washing liquid tank, a liquid inlet valve and a liquid outlet valve; an inlet of the washing liquid pipeline is connected with a first bypass pipeline and is positioned between the storage tank water drainage pipeline and the first bypass valve, and an outlet of the washing liquid pipeline is connected with the first bypass pipeline and is positioned between the first bypass valve and the circulating pump; the washing liquid tank, the liquid inlet valve and the liquid outlet valve are all arranged on the washing liquid pipeline, and the washing liquid tank is positioned between the liquid inlet valve and the liquid outlet valve.

10. The apparatus of claim 9, wherein the first bypass conduit is further provided with a pressure sensing gauge, the pressure sensing gauge being located between the circulation pump and the second bypass valve;

the drainage pipeline is further provided with a detection valve, a steam trap and a temperature detection meter, the detection valve is located between the drain valve and the drainage pipeline of the storage tank, the temperature detection meter is located between the drain valve and the detection valve, and the steam trap is arranged between the drain valve and an outlet of the drainage pipeline.

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