Novel automatic cleaning device for impeller of air compressor

Abstract

The invention relates to the technical field of energy-saving maintenance of industrial compressors, and discloses a novel automatic cleaning device for an impeller of an air compressor. An inlet of the water pump is connected with the bottom of the water storage tank, and an outlet of the water pump is connected with a main inlet of the multi-stage flushing unit; a drainage recovery unit; the timing controller is configured to trigger a cleaning process according to a preset period, control the opening of the water injection valve (V2) based on a signal that the conductivity of the water quality analyzer is less than or equal to 50 [mu] S / cm, close the water inlet valve (V1) and the water injection valve (V2) based on a full water level signal of the liquid level sensor, and control the opening and closing time sequence of the water pump and the flushing valves (V3-V5) in a time-sharing manner; the cleaning process is triggered through the timing controller according to the preset period, the cleaning process can be set to be started on a fixed date per month, frequent manual intervention is not needed, the whole cleaning process can be automatically completed, the problem that manual cleaning consumes a large amount of manpower and material resources is solved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving maintenance technology for industrial compressors, specifically a novel automatic cleaning device for air compressor impellers. Background Technology

[0002] The raw material air compressor is the largest moving piece of equipment in the air separation unit, providing raw materials and energy for the entire air separation process. It is also the most power-consuming piece of equipment in the entire air separation unit. Driven by a motor, the impeller of the air compressor rotates at high speed, and the blades do work on the gas, giving it energy. The energy-enhanced gas then enters the air separation unit, where qualified products are separated and delivered to the user.

[0003] The air compressed by an air compressor must be highly pure. The higher the purity of the air, the greater the effective work of the compressor, and the better it protects the impeller from corrosion and wear, extending its service life. Current air separation processes use self-cleaning filters, achieving a filtration efficiency of over 99.9% for 2μm particles under normal resistance, which is very high. However, with air separation production reaching hundreds of thousands of units per hour, a considerable amount of tiny impurities still enter the compressor and adhere to the impeller. Therefore, regular cleaning of these impurities is essential. Previously, air separation companies used pure water to manually clean the impeller, which was labor-intensive, resource-intensive, and ineffective. Now, a new cleaning method automatically cleans the impeller, perfectly solving the problems of impurity buildup leading to impeller damage and increased energy consumption. Summary of the Invention

[0004] The purpose of this invention is to provide a novel automatic cleaning device for air compressor impellers, which solves the problem in the prior art that even when the hourly air volume of air separation production reaches hundreds of thousands, a considerable number of tiny impurities are still drawn into the compressor and adsorbed on the impeller.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A novel automatic air compressor impeller cleaning device includes:

[0007] A water source access unit, the water source access unit including a water inlet valve V1 controlled by a timing controller;

[0008] A filtration device is connected in series downstream of the water source access unit, and the filtration device is used to remove solid impurities from industrial clean water.

[0009] A water quality analyzer is installed at the outlet of the filtration device and is used to detect the conductivity of the filtered water in real time.

[0010] A water storage tank, the bottom of which is equipped with a liquid level sensor, and the top of which is connected to the outlet of the filter device via a water injection valve V2;

[0011] A multi-stage flushing unit, comprising a first branch, a second branch, and a third branch, wherein the first branch is connected to a first-stage impeller via a first flushing valve V3, and the outlet of the first branch is connected to a normally open drain valve V6; the second branch is connected to a second-stage impeller via a second flushing valve V4, and the outlet of the second branch is connected to a normally open drain valve V7; and the third branch is connected to a third-stage impeller via a third flushing valve V5, and the outlet of the third branch is connected to an air pre-cooling system.

[0012] A water pump, wherein the water pump inlet is connected to the bottom of the water storage tank, and the water pump outlet is connected to the main inlet of the multi-stage flushing unit;

[0013] A drainage recovery unit, which includes the normally open drain valves V6 and V7 and an air precooling system interface;

[0014] The timing controller is configured to trigger the cleaning process according to a preset cycle. Based on a water quality analyzer signal indicating a conductivity ≤50μS / cm, it controls the opening of the water injection valve V2. Based on a level sensor signal indicating a full water level, it closes both the inlet valve V1 and the water injection valve V2. It also controls the opening and closing sequence of the water pump and flushing valves V3-V5 in a time-sharing manner. This automatic cleaning device consists of multiple units. The water source access unit introduces industrial clean water through the inlet valve controlled by the timing controller. The filtration device removes solid impurities from the introduced water. The water quality analyzer monitors the conductivity of the filtered water in real time. The storage tank stores water that meets the required standards. The water level is monitored by a level sensor; a multi-stage flushing unit flushes each stage of the impeller through different branches and flushing valves; a water pump provides flushing power; a drainage and recycling unit is responsible for drainage and recycling; a timing controller comprehensively controls the entire cleaning process, controlling the actions of each component according to preset cycles, water quality, and level signals, thus realizing the basic function of automatic cleaning of the air compressor impeller. All units work together to form a complete system from water source introduction, water treatment, cleaning to drainage and recycling, ensuring that the cleaning process can be carried out automatically according to preset conditions and sequence, improving the efficiency and reliability of cleaning.

[0015] Preferably, the timing controller has a built-in step-by-step timing module that executes the following steps: after the water pump starts, the first flushing valve V3 is opened and closed after 20 minutes; the second flushing valve V4 is opened simultaneously and closed after another 20 minutes; the third flushing valve V5 is opened simultaneously and the water pump is closed after another 20 minutes. The built-in step-by-step timing module controls the opening and closing of the water pump and each flushing valve in a specific time sequence. After the water pump starts, the first flushing valve is opened first and closed after 20 minutes, then the second flushing valve is opened and closed after another 20 minutes, and finally the third flushing valve is opened and the water pump is closed after 20 minutes, completing a complete three-stage impeller cleaning process. This precisely controls the flushing time of each impeller stage, ensuring that each impeller is thoroughly cleaned, avoiding insufficient or excessive cleaning, and improving the stability and consistency of the cleaning effect.

[0016] Preferably, the water quality analyzer and the water injection valve V2 form a closed-loop control: when the detected conductivity is >50μS / cm, the water injection valve V2 is blocked from opening, and the backwashing program of the filter device is triggered. The water quality analyzer and the water injection valve form a closed-loop control, and the conductivity of the filtered water is detected in real time. When the conductivity is >50μS / cm, it indicates that the water quality does not meet the requirements. At this time, the water injection valve is blocked from opening, and the backwashing program of the filter device is triggered to clean the filter device to restore its filtration performance. This ensures that the water entering the water storage tank always meets the cleaning requirements, prevents water that does not meet the water quality standards from causing secondary pollution to the impeller, and allows for timely maintenance of the filter device to ensure its normal operation, thereby improving the cleaning quality and equipment reliability.

[0017] Preferably, the drainage recycling unit 7 satisfies:

[0018] The drain valves V6 and V7 of the first-stage and second-stage impellers are normally open ball valves. The drain end of the third-stage impeller is equipped with an anti-backflow device, and its outlet is connected to the cooling water recovery pipe of the air precooling system through a flange. The drain valves of the first-stage and second-stage impellers are normally open ball valves to ensure that the flushing water can be discharged in time. The drain end of the third-stage impeller is equipped with an anti-backflow device, and its outlet is connected to the cooling water recovery pipe of the air precooling system. The anti-backflow device ensures drainage safety and prevents the backflow of the medium in the air precooling system, realizing smooth drainage of each stage of the impeller. At the same time, the cleaning water of the third-stage impeller is recycled and reused, improving the utilization rate of water resources, reducing operating costs, and ensuring the safety and stability of the drainage system.

[0019] Preferably, the filtration device comprises a 20μm coarse filter and a 5μm fine filter connected in series, with filtration accuracy meeting the ISO 8573-1:2010 Class 2 standard. The filtration device uses a 20μm coarse filter and a 5μm fine filter connected in series. The coarse filter first removes larger solid impurities, and the fine filter further removes tiny impurities. The filtration accuracy meets the ISO 8573-1:2010 Class 2 standard, effectively removing solid impurities from industrial clean water, providing a high-quality water source for cleaning, preventing impurities from adhering to the impeller, protecting the impeller from corrosion and wear, and extending the impeller's service life.

[0020] Preferably, the timing controller 8 includes: a cycle setting module configured to start on a fixed date each month; and a time delay relay that precisely controls the 20-minute inter-stage rinsing interval with an error ≤ ±0.5%. The cycle setting module can be set to start the cleaning process on a fixed date each month to achieve regular automatic cleaning. The time delay relay precisely controls the 20-minute inter-stage rinsing interval with an error ≤ ±0.5%. Users can set the cleaning cycle according to actual needs to achieve automated regular maintenance and reduce manual intervention. Precise inter-stage rinsing interval control ensures the orderly progress of the cleaning process and improves the repeatability of the cleaning effect.

[0021] Preferably, it also includes a current monitoring module to collect the air compressor motor current value in real time. When the current drops by less than 8A, the cleaning program is automatically triggered. The timer controller includes a cycle setting module and a time delay relay. The current monitoring module collects the air compressor motor current value in real time. When the current drops by less than 8A, it indicates that there may be a lot of impurities attached to the impeller, which leads to an increase in the air compressor load and energy consumption. At this time, the cleaning program is automatically triggered, which can detect the impurity attachment on the impeller in time and start the cleaning program automatically before the energy consumption increases significantly. This improves the operating efficiency of the compressor, reduces energy consumption, and avoids damage to the impeller caused by long-term accumulation of impurities.

[0022] Preferably, the water storage tank 4 is designed with the total flushing water volume of the three-stage impeller to meet the following condition: volume ≥ Q1 + Q2 + Q3 × 20 min × 3; where Q1, Q2, and Q3 are the flushing flow rates of a single-stage impeller, and the water storage tank volume is designed with the total flushing water volume of the three-stage impeller to meet the following condition: volume ≥ (Q1 + Q2 + Q3) × 20 min × 3 (Q1, Q2, and Q3 are the flushing flow rates of a single-stage impeller). This ensures that the water storage tank can store enough water to complete the entire cleaning process, ensuring that the cleaning process will not be interrupted due to water shortage, and enabling the cleaning process to proceed continuously and stably, thereby improving cleaning efficiency and reliability.

[0023] Preferably, the diameter of each flushing branch pipe is matched with the corresponding impeller inlet pipe diameter, satisfying a flow rate ratio of 1:1.2~1.5 and a flushing pressure ≥0.5MPa. This ensures that water can reach the impeller at a suitable flow rate and pressure during the flushing process, fully exerting the cleaning effect, allowing the cleaning water to evenly and effectively impact the impeller surface, improving the cleaning effect, ensuring that impurities on the impeller can be thoroughly cleaned, and avoiding damage to the impeller due to improper flow rate and pressure.

[0024] Preferably, the anti-backflow device is a double check valve assembly, which includes a first check valve and a second check valve. The first check valve is used to prevent the backflow of the medium in the air precooling system, and the second check valve is equipped with a spring loading mechanism to ensure that it opens when the pressure difference of the three-stage impeller drainage is >0.1MPa. In this invention, the valve is controlled by a time control system to introduce industrial clean water into the filtration system for filtration, and then the qualified water source is injected into the water tank. The water is then pumped into the three-stage impeller for cleaning and then discharged. In operation, set the time to 10:00 AM on the 20th of each month. The time control system will open valve V1 to introduce industrial clean water into the filtration system. Once the analyzer detects that the water quality is below 50 μS / cm, valve V2 will automatically open to fill the water tank. After the water level gauge detects that the water level has reached the standard, valves V1 and V2 will close, the water pump will automatically start, and valve V3 will open to send water to the primary impeller for flushing. After flushing, the water will be discharged through the normally open valve V6. After 20 minutes, valve V4 will open and valve V3 will close to flush the secondary impeller. After flushing, the water will be discharged through the normally open valve V7. After another 20 minutes, valve V5 will open and valve V4 will close to flush the tertiary impeller. After flushing, the water will enter the air pre-cooling system and be discharged. After 20 minutes, the pump will stop and valve V5 will be closed. At this point, the impeller cleaning process is complete. The advantages of this invention are its simple structure, minimal equipment addition, and automatic control that delivers purified water to the air compressor impeller for cleaning, ensuring stable and efficient operation of the air compressor. The anti-backflow device employs a double check valve assembly. The first check valve prevents the backflow of the medium in the air precooling system, while the second check valve, equipped with a spring-loaded mechanism, only opens when the pressure difference between the three-stage impeller drainage and the second check valve is greater than 0.1 MPa. This ensures the safety and unidirectionality of drainage, preventing the medium in the air precooling system from flowing back to the three-stage impeller. It also ensures that the cleaning water can be smoothly discharged into the cooling water recovery pipe of the air precooling system, avoiding reduced cleaning effectiveness and equipment damage caused by backflow, and improving the reliability of the drainage system.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] 1. This invention triggers the cleaning process according to a preset cycle using a timer controller, which can be set to start on a fixed date each month. It eliminates the need for frequent manual intervention and automatically completes the entire cleaning process, avoiding the significant manpower and material costs associated with manual cleaning and improving work efficiency. The timer controller has a built-in step-by-step timing module that precisely controls the opening and closing sequence of the water pump and each flushing valve. For example, after the water pump starts, the first, second, and third flushing valves open sequentially, with each valve remaining open for 20 minutes. A time-delay relay precisely controls the inter-stage flushing interval with an error of ≤±0.5%, ensuring an orderly and stable cleaning process. Simultaneously, a 20μm coarse filter and a 5μm fine filter are connected in series through a filtration device, achieving a filtration accuracy that meets ISO 8573-1:2010 Class The system meets two standards and can effectively remove solid impurities from industrial water, providing a high-quality water source for cleaning and preventing impurities from re-adhering to the impeller. The water quality analyzer is located at the outlet of the filter device to detect the conductivity of the filtered water in real time and forms a closed-loop control with the water injection valve. When the detected conductivity is >50μS / cm, the water injection valve is blocked from opening and the backwashing procedure of the filter device is triggered to ensure that the water entering the storage tank meets the cleaning requirements, thereby improving the cleaning effect.

[0027] 2. The drain valves of the first-stage and second-stage impellers in this invention are normally open ball valves, which can discharge cleaning wastewater in a timely manner and ensure the smooth progress of the cleaning process. The drain end of the third-stage impeller is equipped with an anti-backflow device, and its outlet is connected to the cooling water recovery pipe of the air precooling system through a flange, realizing the recycling of cleaning wastewater and saving water resources. At the same time, the anti-backflow device adopts a double check valve group, which can effectively prevent the backflow of the medium in the air precooling system and ensure that it opens when the drainage pressure difference of the third-stage impeller is >0.1MPa, ensuring safe and reliable drainage. In addition, through regular automatic cleaning, it can effectively remove the tiny impurities adsorbed on the impeller, avoid impurities causing corrosion and wear to the impeller, extend the service life of the impeller, and reduce equipment maintenance costs. A current monitoring module is set up to collect the current value of the air compressor motor in real time. When the current drops to <8A, the cleaning program is automatically triggered. Timely cleaning of impurities on the impeller can improve the effective work of the compressor, reduce energy consumption, and solve the problem of increased energy consumption caused by impurity adhesion.

[0028] 3. The water storage tank of this invention is designed according to the total flushing water volume of the three-stage impeller, with a volume ≥ (Q1 + Q2 + Q3) × 20 min × 3, where Q1, Q2, and Q3 are the flushing flow rates of a single-stage impeller, thus meeting the water demand of the entire cleaning process and ensuring uninterrupted cleaning. At the same time, the diameter of each flushing branch pipe matches the corresponding impeller inlet pipe diameter, meeting the flow rate ratio of 1:1.2 - 1.5 and the flushing pressure ≥ 0.5 MPa, ensuring that the cleaning water can reach the impeller at a suitable flow rate and pressure, thereby improving the cleaning effect. Attached Figure Description

[0029] Figure 1This is a complete diagram of the system of the present invention;

[0030] Figure 2 This is the overall control flowchart of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall system structure of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] refer to Figure 1 , Figure 2 and Figure 3 A novel automatic air compressor impeller cleaning device includes:

[0034] A water source access unit, which includes an inlet valve V1 controlled by a timing controller;

[0035] A filtration device is connected in series downstream of the water source access unit and is used to remove solid impurities from industrial clean water.

[0036] A water quality analyzer is installed at the outlet of the filtration device and is used to detect the conductivity of the filtered water in real time.

[0037] The water storage tank has a liquid level sensor at the bottom and the top of the water storage tank is connected to the outlet of the filter device through the water injection valve V2.

[0038] The multi-stage flushing unit includes a first branch, a second branch, and a third branch. The first branch is connected to the first-stage impeller via the first flushing valve V3, and the outlet of the first branch is connected to the normally open drain valve V6. The second branch is connected to the second-stage impeller via the second flushing valve V4, and the outlet of the second branch is connected to the normally open drain valve V7. The third branch is connected to the third-stage impeller via the third flushing valve V5, and the outlet of the third branch is connected to the air pre-cooling system.

[0039] The water pump has its inlet connected to the bottom of the water storage tank, and its outlet connected to the main inlet of the multi-stage flushing unit.

[0040] The drainage recovery unit includes normally open drain valves V6 and V7 and an air precooling system interface.

[0041] The timing controller is configured to trigger the cleaning process according to a preset cycle. It controls the opening of the water injection valve V2 based on the signal from the water quality analyzer with a conductivity of ≤50μS / cm, and closes the water inlet valve V1 and the water injection valve V2 based on the full water level signal from the liquid level sensor. It also controls the opening and closing sequence of the water pump and flushing valves V3-V5 in a time-sharing manner.

[0042] The timing controller has a built-in step timing module that executes the following steps: after the water pump starts, the first flushing valve V3 is opened and closed after 20 minutes; the second flushing valve V4 is opened simultaneously and closed after another 20 minutes; the third flushing valve V5 is opened simultaneously and the water pump is turned off after another 20 minutes.

[0043] The water quality analyzer and the water injection valve V2 form a closed-loop control: when the detected conductivity is >50μS / cm, the opening of the water injection valve V2 is blocked, and the backwashing program of the filter device is triggered.

[0044] Wastewater recycling unit 7 satisfies:

[0045] The drain valves V6 and V7 of the first-stage and second-stage impellers are normally open ball valves;

[0046] The three-stage impeller is equipped with an anti-backflow device at the drain end, and its outlet is connected to the cooling water recovery pipe of the air precooling system via a flange; the filtration device includes a 20μm coarse filter and a 5μm fine filter connected in series, and the filtration accuracy meets the ISO 8573-1:2010 Class 2 standard; the timing controller 8 includes: a cycle setting module, which is configured to start on a fixed date each month; and a time delay relay, which precisely controls the 20-minute inter-stage flushing interval with an error ≤ ±0.5%.

[0047] Includes a current monitoring module that collects the air compressor motor current value in real time. When the current drops below 8A, the cleaning program is automatically triggered. The water storage tank has a capacity of 4 cubic meters, designed to handle the total flushing water volume of the three-stage impeller, meeting the following requirements:

[0048] Volume ≥ Q1 + Q2 + Q3 × 20 min × 3;

[0049] Q1, Q2, and Q3 are the single-stage impeller flushing flow rates, respectively.

[0050] Each flushing branch pipe diameter is matched with the corresponding impeller inlet pipe diameter to meet the flow rate ratio of 1:1.2~1.5, flushing pressure ≥0.5MPa, and the anti-backflow device is a double check valve group, which includes a first check valve and a second check valve. The first check valve is used to prevent the backflow of the medium in the air precooling system, and the second check valve is equipped with a spring loading mechanism to ensure that it opens when the drainage pressure difference of the three-stage impeller is >0.1MPa.

[0051] The water supply unit receives industrial clean water through an inlet valve V1 controlled by a timer controller. The timer controller controls the opening and closing of inlet valve V1 based on the water level information from the storage tank, fed back by a level sensor. When the level sensor detects that the storage tank is not full, the timer controller opens inlet valve V1, allowing industrial clean water to enter the system. When a full water level signal is detected, the timer controller closes inlet valve V1, stopping the water intake. The industrial clean water entering the system first flows through a series-connected filtration device, which includes a 20μm coarse filter and a 5μm fine filter, with filtration accuracy meeting ISO 8573-1:2010 Class... The standard consists of two parts: a coarse filter to pre-filter larger solid impurities in the water, and a fine filter to further remove smaller impurities, ensuring that the water entering subsequent stages is relatively pure and preventing secondary pollution of the impeller by impurities. A water quality analyzer is installed at the outlet of the filtration device to monitor the conductivity of the filtered water in real time. It forms a closed-loop control with the water injection valve V2. When the detected conductivity is ≤50μS / cm, it indicates that the water quality meets the requirements. Based on this signal, the timer controller controls the water injection valve V2 to open, allowing the filtered water to flow into the storage tank. When the detected conductivity is >50μS / cm, the water injection valve V2 is blocked from opening, and the backwashing program of the filtration device is triggered to clean the filtration device and restore its filtration performance. The storage tank is used to store filtered water that meets the water quality requirements. A liquid level sensor is installed at the bottom of the tank to monitor the water level in real time. When the water level has not reached the set full level, the water injection valve V2 opens, and water flows from the filter outlet into the storage tank. When the full level is reached, the level sensor sends a full level signal to the timer controller, which then closes the inlet valve V1 and the water injection valve V2, stopping the water injection into the storage tank. The storage tank's volume is designed based on the total flushing water volume of the three-stage impeller, satisfying the requirement of volume ≥ Q1 + Q2 + Q3 × 20 min × 3. Q1, Q2, and Q3 are the single-stage impeller flushing flow rates, ensuring sufficient water volume to complete the entire cleaning process. When the preset cleaning cycle is reached or the current monitoring module detects a drop in air compressor motor current of <8A, the timer controller triggers the cleaning process, starts the water pump, and connects the water pump inlet to the bottom of the water storage tank. The water is then pumped out of the water storage tank and delivered to the main inlet of the multi-stage flushing unit. After the water pump starts, the timer controller controls the first flushing valve V3 to open, and water enters the first-stage impeller through the first branch for flushing. The diameter of the first branch pipe matches the inlet pipe diameter of the first-stage impeller, satisfying a flow rate ratio of 1:1.2 - 1.5 and a flushing pressure ≥0.5MPa to ensure the flushing effect. After flushing for 20 minutes, the timer controller closes the first flushing valve V3.Water flushed from the first-stage impeller is discharged through the normally open drain valve V6. Simultaneously with the closure of the first flush valve V3, the timer controller opens the second flush valve V4, allowing water to enter the second-stage impeller through the second branch for flushing. Appropriate pipe diameter, flow rate ratio, and flushing pressure are maintained. After flushing for 20 minutes, the timer controller closes the second flush valve V4, and the water flushed from the second-stage impeller is discharged through the normally open drain valve V7.

[0052] The drainage recovery unit includes normally open drain valves V6 and V7 and an interface to the air precooling system. The drain valves V6 and V7 for the first and second stage impellers are normally open ball valves, allowing flushing water to be discharged directly through them. The tertiary impeller drainage is connected to the cooling water recovery pipeline of the air precooling system via a double check valve assembly to prevent backflow, thus achieving the recycling of cleaning water and improving water resource utilization. The first check valve prevents backflow of the air precooling system medium, while the second check valve, equipped with a spring-loaded mechanism, ensures opening when the tertiary impeller drainage pressure difference is >0.1 MPa, guaranteeing drainage safety. To ensure reliability, the current monitoring module collects the air compressor motor current value in real time. When a current drop of less than 8A is detected, it indicates that there may be a lot of impurities attached to the impeller, leading to increased energy consumption of the air compressor. At this time, the cleaning program is automatically triggered to clean the impeller in a timely manner to restore the performance of the air compressor. The timing controller includes a cycle setting module and a time delay relay. The cycle setting module can be set to start the cleaning process on a fixed date every month. The time delay relay precisely controls the 20-minute inter-stage flushing interval with an error of ≤±0.5%, ensuring the accuracy of the time for each flushing stage and guaranteeing the stability and consistency of the cleaning effect.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel air compressor impeller automatic cleaning device, characterized in that, Comprise: Water source access unit, the water source access unit contains water inlet valve (V1) controlled by timing controller; Filtering device, the filtering device is connected in series downstream of water source access unit, and the filtering device is used for removing solid impurities in industrial clean water; Water quality analyzer, the water quality analyzer is arranged at the outlet of the filtering device, and the water quality analyzer is used for real-time detection of filtered water conductivity; Water storage tank, the bottom of the water storage tank is provided with a liquid level sensor, and the top of the water storage tank is connected with the outlet of the filtering device through a water filling valve (V2); Multi-stage flushing unit, the multi-stage flushing unit includes a first branch, a second branch and a third branch, the first branch is connected with a first impeller through a first flushing valve (V3), and the outlet of the first branch is connected with a normally open drain valve (V6), the second branch is connected with a second impeller through a second flushing valve (V4), and the outlet of the second branch is connected with a normally open drain valve (V7), the third branch is connected with a third impeller through a third flushing valve (V5), and the outlet of the third branch is connected with an air precooling system; Water pump, the inlet of the water pump is connected with the bottom of the water storage tank, and the outlet of the water pump is connected with the total inlet of the multi-stage flushing unit; Drainage recovery unit, the drainage recovery unit contains the normally open drain valves (V6, V7) and an air precooling system interface; Timing controller, the timing controller is configured to trigger the cleaning process according to the preset period, control the water filling valve (V2) to open based on the signal that the conductivity of the water quality analyzer is less than or equal to 50 μS / cm, and control the water inlet valve (V1) and the water filling valve (V2) to close based on the full water level signal of the liquid level sensor, and control the opening and closing time sequence of the water pump and the flushing valves (V3-V5) in time.

2. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein, The timing controller is provided with a step-by-step timing module, which performs: After the water pump is started, the first flushing valve (V3) is opened, and after 20 minutes, the first flushing valve (V3) is closed; Synchronously open the second flushing valve (V4), and after 20 minutes, the second flushing valve (V4) is closed; Synchronously open the third flushing valve (V5), and after 20 minutes, the third flushing valve (V5) is closed.

3. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: The water quality analyzer and the water filling valve (V2) form a closed loop control: when the detected conductivity is greater than 50 μS / cm, the water filling valve (V2) is blocked, and the backwashing program of the filtering device is triggered.

4. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein, The drainage recovery unit (7) satisfies: The drain valves (V6, V7) of the first impeller and the second impeller are normally open ball valves; The third impeller drainage end is provided with an anti-backflow device, and the outlet thereof is connected with the cooling water recovery pipeline of the air precooling system through a flange.

5. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: The filtering device contains 20 μm coarse filter and 5 μm fine filter connected in series, and the filtering precision meets the ISO 8573-1:2010 Class 2 standard.

6. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein, The timing controller contains: Period setting module, the period setting module is configured to start on a fixed date every month; Delay relay, the delay relay accurately controls the 20-minute interval between stages, and the error is less than or equal to ±0.5%.

7. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: It also includes a current monitoring module, which collects the motor current value of the air compressor in real time, and automatically triggers the cleaning program when the current drop value is less than 8 A.

8. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: The volume of the water storage tank is designed according to the total flushing water volume of the third impeller, which satisfies: Volume ≥ (Q1 + Q2 + Q3) × 20 min × 3; Q1, Q2, and Q3 are the single-stage impeller flushing flow rates, respectively.

9. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: The diameter of each flushing branch pipe is matched with the corresponding impeller inlet pipe diameter, satisfying a flow rate ratio of 1:1.2~1.5 and a flushing pressure ≥0.5MPa.

10. A novel automatic cleaning device for air compressor impeller as claimed in claim 1, wherein: The backflow prevention device is a double check valve assembly, which includes a first check valve and a second check valve. The first check valve is used to prevent the backflow of the medium in the air precooling system, and the second check valve is equipped with a spring loading mechanism to ensure that it opens when the pressure difference of the three-stage impeller drainage is >0.1MPa.

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