443 results about "Inlet pressure" patented technology

The invention discloses a safety valve service life evaluation method based on pressure history statistics and dynamic damage accumulation. According to the method, only safety valve inlet pressure time sequence data is needed, a load cycle is extracted through an improved rain flow counting method, and the nonlinear damage increment is calculated according to an S-N curve model dynamically degraded along with the accumulated damage degree. According to the method, a self-adaptive failure probability threshold is established based on historical failure data, and probabilistic prediction of the residual life is realized. The model is clear in physical significance, only needs a single data source, significantly reduces the implementation complexity and cost, greatly improves the precision of life prediction by considering the degradation of material performance, and is especially suitable for predicting the accelerated failure risk of the safety valve in the later period of long-term service.

The embodiment of the invention provides a calculation method and device for boundary parameters of a supercritical fluid heat exchanger, computer equipment and a medium, and relates to the technical field of fluid mechanics and heat transfer science calculation.The method comprises the following steps that design parameters and target working conditions of the heat exchanger are obtained; calculating to obtain the single section length of each infinitesimal section; based on the initial inlet pressure guess value, according to the length of the single section and the pressure and the temperature of the infinitesimal section i, the pressure and the temperature of the infinitesimal section i + 1 are obtained through calculation, the difference value between the outlet calculation pressure and the target outlet pressure is calculated, and the difference value serves as a pressure error; if the pressure error is greater than the convergence tolerance, updating the inlet pressure guess value by adopting a numerical iteration method, and performing iteration again based on the inlet pressure guess value after iteration; otherwise, iteration is terminated, and the final inlet pressure value and the final outlet temperature value are output. According to the scheme, the calculation efficiency and accuracy of solving the inlet pressure and the outlet temperature of the supercritical fluid heat exchanger under the given target outlet pressure are improved.

The invention relates to the technical field of waste gas treatment, and provides an oil tank waste gas adsorption treatment system and a control method. The anti-explosion variable-frequency induced draft fan is arranged on the main oil and gas pipeline; the flame arrester is arranged on the main oil and gas pipeline and located on the upstream of the air inlet direction of the anti-explosion variable-frequency induced draft fan; a gas inlet of the first activated carbon adsorption box is communicated with the main oil-gas pipeline, and a gas outlet of the first activated carbon adsorption box is communicated with a gas inlet of the second activated carbon adsorption box in series; the inlet pressure sensor is arranged at the air inlet end of the first activated carbon adsorption box; the outlet pressure sensor is arranged at the air outlet end of the second activated carbon adsorption box; the inlet valve is arranged at the air inlet end of the first activated carbon adsorption box, and the outlet valve is arranged at the air outlet end of the second activated carbon adsorption box. Through cooperation of series adsorption, active air induction and intelligent monitoring, multiple functions of efficient purification, safe operation and state early warning of the oil tank waste gas adsorption treatment system are achieved.

The embodiment of the invention provides an engine supercharging system and a vehicle, and relates to the technical field of vehicle manufacturing. The electronic supercharger is constructed into a two-stage supercharger, the electronic supercharger is provided with a first-stage compressed air flow channel and a second-stage compressed air flow channel, a turbine compressed air flow channel is formed in the turbocharger, and the first-stage compressed air flow channel, the second-stage compressed air flow channel and the turbine compressed air flow channel are distributed in series. And the three-stage compressed air inlets are communicated with the air inlet to form three-stage compressed air inlet to the air inlet. According to the engine supercharging system provided by the embodiment of the invention, gas can be supercharged for three times through the first-stage compressed air flow channel, the second-stage compressed air flow channel and the turbine compressed air flow channel, so that the air compression ratio can be increased, the turbine hysteresis phenomenon is avoided, the air inlet pressure response speed is increased, and transient air supply to an engine is ensured; the operation stability and combustion efficiency of the engine are guaranteed, the fuel economy of the engine is improved, and the driving experience is improved.

The invention discloses an anti-airlock method and equipment for an electric submersible screw pump based on working condition recognition and a medium, and relates to the technical field of oil exploitation equipment. The method comprises the steps that based on an underground detection device and a ground control cabinet sensor of the electric submersible screw pump unit, operation parameters of the electric submersible screw pump unit are collected in real time, and the operation parameters are preprocessed to obtain standard operation parameters; wherein the operation parameters comprise pump inlet pressure and motor output current; extracting pressure-current correlation characteristics under the airlock working condition to construct an airlock working condition identification model, and inputting the standard operation parameters into the airlock working condition identification model to obtain an airlock state grade; and based on the airlock state grade, the operation regulation and control strategy of the electric submersible screw pump unit is adjusted so as to eliminate the airlock phenomenon. Real-time data of underground and ground sensors are collected, the airlock grade is judged in advance through the airlock working condition recognition model, the operation state is automatically adjusted, and early warning of the airlock is achieved.

The invention provides a steam turbine generator unit feed pump net positive suction head detection system and method, relates to the technical field of net positive suction detection, and solves the technical problem that net positive suction is difficult to recognize in advance in the prior art. The system specifically comprises a temperature acquisition module used for acquiring the temperature of the deaerator; the judgment and early warning module is used for receiving the flow change rate of the feed pump and triggering alarm when the flow change rate exceeds a flow threshold value; the effective net positive suction head calculation module is used for converting the inlet pressure of the water feeding pump into absolute pressure; temperature correction is conducted on the temperature of the deaerator to obtain the saturation temperature of an inlet of the water feeding pump, the saturation temperature is converted into saturated vapor pressure, and the effective net positive suction head is calculated based on the absolute pressure and the saturated vapor pressure; the necessary net positive suction head obtaining module is used for calling the necessary net positive suction head table and calculating and obtaining the necessary net positive suction head; and the net positive suction head calculation module is used for receiving the effective net positive suction head and the necessary net positive suction head and calculating the net positive suction head. The device is used for detecting the net positive suction head.

The invention relates to a centrifugal compressor high-altitude environment dynamic simulation test system. The system comprises a compressor test module; the high-altitude environment simulation module comprises an air inlet surge tank, an air inlet assembly and a first air exhaust assembly which are arranged at the upstream of the air inlet pipeline, and an air exhaust surge tank and a second air exhaust assembly which are arranged at the downstream of the air exhaust pipeline; a measurement module; the control module is used for comparing the first actually-measured pressure value with a target altitude pressure value of the air inlet end and controlling the air inlet amount of the air inlet assembly and the air suction amount of the first air suction assembly according to a comparison result, so that the pressure of the air inlet pressure stabilizing tank is stabilized at the target altitude pressure of the air inlet end; and the control module compares the second actually measured pressure value with the target altitude pressure value of the exhaust end, and controls the air suction amount of the second air suction assembly according to the comparison result, so that the pressure of the exhaust surge tank is stabilized at the target altitude pressure value of the exhaust end. It is ensured that test data can truly reflect the actual plateau working condition performance of the gas compressor.

The invention discloses a gas compressor test device and method, and belongs to the field of gas compressor tests.The gas compressor test device comprises a driver, and a driving shaft of the driver is used for being connected with a main shaft of a gas compressor; the unloading assembly comprises a balance drum, a high-pressure gas supply unit, an exhaust unit and an adjusting valve, the balance drum is used for being connected with a main shaft of the gas compressor and used for being connected with an impeller on the main shaft of the gas compressor, the high-pressure gas supply unit is used for being communicated between the balance drum and the impeller, and the exhaust unit is used for being communicated with the side, away from the impeller, of the balance drum; an inlet temperature sensor, an inlet pressure sensor and a flow sensor are arranged in the double-twisted-wire air inlet channel; an outlet temperature sensor and an outlet pressure sensor are arranged in the annular outlet throttler; and a controller. The technical effects of the invention lie in that the device not only facilitates the independent test of the related gas compressor, but also facilitates the small axial force of the impeller of the gas compressor borne by the thrust bearing.

The invention discloses an adjustable buffer type inclined check valve, and relates to the technical field of check valves, when a medium flows in from an inlet end, close to one side of a protective appliance, of a valve body, pressure can jack up a connecting frame body to mount a valve pin shaft, the valve pin shaft drives a valve clack and the valve pin shaft to rotate upwards to open, a flow channel is completely smooth, and the medium passes through smoothly; when the inlet pressure is reduced or the outlet pressure is higher than the inlet pressure and has a backflow trend, the reverse pressure and the dead weight of the valve clack enable the valve clack to rapidly rotate downwards and be tightly attached to the valve seat block, sealing is formed, backflow is thoroughly blocked, a medium is prevented from being poured back to the upstream, and one-way flowing is stably kept. The fixing frame is matched with the valve seat block for inclined installation, the sealing effect between the valve seat block and the inner wall of the valve body is kept, an inclined installation structure is adopted, the opening and closing angle of the valve clack is small, the closing stroke is short, valve closing is faster, the sealing face is arranged in an inclined mode, the medium flow state is smoother, scouring is small, and sealing stress is even.

Mass flow control (MFC) devices capable of reporting inlet pressure and methods of reporting inlet pressure are provided. A mass flow controller (MFC) includes a chamber configured to receive a fluid, an upstream valve disposed upstream of the chamber, and a downstream control valve disposed downstream of the chamber. The MFC further includes a pressure sensor that detects fluid pressure in the chamber. The MFC further includes a controller configured to control actuation of the upstream valve. The controller is configured to toggle between two modes of reporting a measured inlet pressure. In a first mode, the controller reports a measured inlet pressure based on a reading from the pressure sensor and storing the reading to a buffer when the upstream valve is open. In a second mode, the controller reports the measured inlet pressure based on the reading stored to the buffer when the upstream valve is closed.

The invention relates to a separation device for brake dust generated by a wheel brake of a motor vehicle, wherein the separation device is configured to be fixedly arranged on a wheel of a motor vehicle for conjoint rotation therewith. The separation device has a flow path, which has at least a first portion with a first flow direction and a second portion with a second flow direction, wherein the first portion adjoins the second portion in a boundary region, and wherein the second flow direction forms an angle with the first flow direction of at least 45°, preferably of at least 60° and particularly preferably of at least 90°. The separation device further comprises a pressure difference-generating element for generating a pressure difference between an inlet pressure at the inlet of the flow path and an outlet pressure at the outlet of the flow path, wherein a collecting portion for brake dust is arranged between the boundary region and the outlet of the flow path. The invention further relates to a wheel for a motor vehicle having such a separation device and to a motor vehicle having such a separation device or having such a wheel.

An apparatus and method for controlling a fuel electrode exhaust valve of a fuel cell system are disclosed, wherein the apparatus includes a hydrogen sensor configured to measure a concentration of hydrogen released by opening the fuel electrode exhaust valve, a first pressure sensor configured to measure an inlet pressure of the fuel electrode exhaust valve, a second pressure sensor configured to measure an outlet pressure of the fuel electrode exhaust valve, and a controller configured to control an opening area of the fuel electrode exhaust valve to a maximum value when exhausting condensate, and to control the opening area of the fuel electrode exhaust valve based on a difference between the inlet pressure and the outlet pressure of the fuel electrode exhaust valve when purging hydrogen.

The utility model discloses a single crystal furnace cooling system which comprises a plurality of cooling pipelines, a main inlet water segregator, a main return water segregator, a main inlet pressure sensor, a main outlet pressure sensor and a main outlet pressure sensor, the main return pressure sensor is used for detecting the water inlet pressure of the cooling system; the manual ball valve is used for adjusting the cooling water flow of the corresponding cooling pipeline; the vortex shedding flowmeter is used for detecting the water outlet flow and temperature of the corresponding cooling pipeline; the turbine flowmeter is used for detecting the total water return flow of the cooling system; according to the invention, the operation safety of the single crystal furnace is improved, and the occurrence of explosion of the single crystal furnace is greatly reduced; the energy consumption of the single crystal furnace is reduced; whether the alarm is a false alarm or not is judged through double insurance of flow and temperature, and a powerful basis is provided for troubleshooting reasons.

The invention discloses a primary fan bearing vibration intelligent early warning method and system. A single vibration signal is easily interfered by working condition fluctuation (such as load change and inlet pressure sudden change) of equipment and environmental noise, so that the false alarm rate is high. The method comprises the following steps: multi-source data synchronous acquisition; working condition adaptive parameter adjustment; dynamic threshold generation; performing multi-source information fusion early warning, wherein the auxiliary parameters comprise at least one of bearing temperature, motor three-phase current unbalance degree and fan inlet pressure fluctuation amplitude; and when the main early warning criterion and the at least one auxiliary early warning criterion are met at the same time, triggering a graded early warning signal. The method is used for intelligent early warning of the primary fan bearing vibration.

This disclosure relates to a valve leakage detection method, apparatus, medium, and electronic equipment. The method is applied to a water supply system, which includes a backup water source, valves, a main water source, a water storage device, a first variable frequency pump, and water supply pipelines. The method includes: real-time detection of the inlet pressure of the water supply pipeline; if the inlet pressure is greater than a preset pressure, repeatedly reducing the frequency of the first variable frequency pump until the backup water source's supply pressure exceeds the preset pressure; and determining whether the valve is leaking based on the change in the inlet pressure of the water supply pipeline after each frequency reduction. This allows for automatic determination of valve leakage based on the change in the inlet pressure of the water supply pipeline after each reduction in the frequency of the first variable frequency pump, facilitating timely valve repair and improving water supply stability. Furthermore, determining valve leakage based on the change in the inlet pressure of the water supply pipeline after multiple frequency reductions improves the accuracy of valve leakage detection.

The invention relates to the technical field of energy storage, in particular to a compressed air energy storage overground and underground gas storage cooperative control method and device, and the method comprises the steps: collecting operation state parameters of a compressed air energy storage system; based on the operation state parameters, calculating a ratio value of the deflation flow of the overground gas storage and the deflation flow of the underground gas storage, and according to the ratio value, calculating a first adjusting opening degree of a flow adjusting valve of the overground gas storage and a second adjusting opening degree of a flow adjusting valve of the underground gas storage; and the opening degree of the corresponding flow adjusting valve is adjusted based on the first adjusting opening degree and the second adjusting opening degree, so that the inlet pressure of the turbine is maintained within the preset pressure range. Therefore, the problems of sudden pressure drop of a turbine inlet, large gas supply switching impact, poor operation stability and the like caused by independent and sequential gas discharging of the overground gas storage and the underground gas storage in the related technology are solved.

A method to control a flow rate in a fluid flow network is disclosed. The method includes setting the outlet port of an upstream pressure regulator in a flow control device to have a first constant pressure that is below a minimum upstream pressure delivered from a upstream portion to the inlet port of the upstream pressure regulator, setting the outlet port of a downstream pressure regulator in the flow control device to have a second constant pressure to maintain a constant pressure differential across the downstream pressure regulator, and maintaining, based on the minimum upstream pressure to the flow control device exceeding the first constant pressure and further based on the constant pressure differential maintained across the downstream pressure regulator, the flow rate of the flow control device at a constant value.

This application belongs to the field of aero-engine technology, and specifically relates to a method and apparatus for simulating aircraft bleed air during sustained test of a turbofan engine, wherein the inlet temperature T1 and inlet pressure P1 of the engine are preset to a range; Step S2: Calculate the aircraft bleed air volume W fy The range, the total bleed air temperature T of the aircraft fy The range and total bleed air pressure P fy Range; Step S3: Calculate the cold diameter D of the bleed air nozzle. fy Range; Step S4: Select the cold-state diameter D of the bleed air nozzle fy An aircraft bleed air volume verification test was conducted to obtain the bleed air volume W for the test. fyr When the induced draft volume W in the experiment fyr The requirements are met, and the cold-state diameter D of the expiratory air nozzle is adopted. fy When the induced draft volume W in the experiment fyr If the requirements are not met, return to step S4; ensure that the calculation error of the aircraft bleed air volume is within the required range, and obtain the actual bleed air volume of the engine in various states to the maximum extent through test program design. This test method has the advantages of simple test method, low test cost and high replacement efficiency.

The invention discloses an air sealing system for a ship stern shaft sealing device, which relates to the technical field of ship stern shaft sealing and comprises a shaft tube body, a sealing structure is mounted at the end of the shaft tube body, an inlet pressure sensor is mounted at the air inlet end of the sealing structure, and a control mechanism is mounted on the inlet pressure sensor through a pipeline. A front oil tank mechanism is installed at the tail end of the shaft tube body, and the control mechanism comprises a control frame, an air control unit, a discharging and collecting unit, a lubricating oil control unit, a pump body and a master controller. Through the arrangement mode that the sealing mechanism and the control mechanism are matched, the pressure of each cavity is dynamically adjusted in a stepped mode according to the ship draft depth and the working condition, a reliable pressure gradient barrier is constructed, seawater invasion and lubricating oil leakage are effectively prevented, the sealing rings and the shaft necks are in a non-contact or micro-contact state, and the service life of the sealing rings and the shaft necks is prolonged. Therefore, mechanical friction and abrasion are reduced fundamentally, and the service life of the sealing ring is prolonged.

The invention discloses a dynamic gas supplementing method, system and equipment for a hydrogen engine and a medium, and relates to the technical field of engine control, the method comprises the steps that the current working condition and the current required gas inflow of the engine are obtained based on the current operation parameters of the engine so as to be matched with a gas supplementing gas source corresponding to the current working condition; the current actual air inflow of the engine is measured, and the difference value between the current required air inflow and the current actual air inflow is calculated; and on the basis of the difference value, the compensation gas amount is calculated through a preset flow compensation algorithm, and a gas supply gas source corresponding to the current working condition is adopted to supply gas to the engine intake manifold with the compensation gas amount. According to the method, the working condition of the engine is recognized, the corresponding air source is matched, meanwhile, the air inlet deviation can be continuously corrected through the preset flow compensation algorithm based on the difference value between the demand and the actual air inlet amount, air inlet pressure fluctuation caused by system delay or disturbance is effectively restrained, and therefore the engine is accurately controlled.

This invention discloses a mine liquid level control device, comprising an intrinsically safe controller, and intrinsically safe pressure sensors, an explosion-proof and intrinsically safe electric ball valve for liquid inlet, an explosion-proof and intrinsically safe electric ball valve for liquid outlet, and several intrinsically safe liquid level sensors, all connected to the intrinsically safe controller. The intrinsically safe pressure sensors are used to detect the liquid inlet pressure of the pipeline, and the intrinsically safe liquid level sensors are used to detect the liquid level in the container. This invention forms a dual monitoring system through the intrinsically safe pressure sensors and intrinsically safe liquid level sensors, which can promptly issue an alarm when the liquid inlet pressure of the pipeline is abnormal.

The utility model discloses a carbon dioxide gas cylinder concentration automatic alarm system for a carbon dioxide incubator, which comprises two gas supply pipelines, each gas supply pipeline comprises a gas cylinder and a pressure reducing valve arranged at a gas outlet of the gas cylinder, the pressure reducing valve is provided with two electronic meters for displaying the pressure of a gas inlet and the pressure of the gas outlet, and the gas supply pipelines are communicated with the gas cylinder. The two air supply pipelines are connected with the electromagnetic three-way valve in parallel, the electromagnetic three-way valve is connected with the carbon dioxide incubator, the electronic meters of the air supply pipelines are electrically connected with the external control assembly, the control assembly is electrically connected with the alarm assembly and the electromagnetic three-way valve, and one air supply pipeline and one standby air supply pipeline are formed through parallel circuits. When the electronic meter of the pressure reducing valve detects that the air pressure is smaller than a set value, the standby circuit is switched to be used, the alarm assembly is started to conduct ventilation warning, and a detector can replace the air cylinder under the condition that continuous supply is guaranteed.

The application discloses a high-reliability long-service-life compensator for spacecraft thermal control and a preparation method, relates to the field of space temperature control fluid loop compensators, and comprises a storage tank body, an upper cover and a bellows assembly. The upper cover is welded to one end of the storage tank body, and the bellows assembly is welded to the other end of the storage tank body. The bellows assembly is located inside the storage tank body and is used for connecting a thermal control fluid loop. A liquid cavity is formed in the bellows assembly, the liquid cavity is communicated with the thermal control fluid loop, and an air cavity is formed between the bellows assembly and the storage tank body. The main function of the compensator is to reduce fluid loop pressure fluctuation, prevent cavitation caused by excessively low inlet pressure of the loop pump, and compensate for the reduction of liquid working medium caused by long-term operation, maintenance and micro-leakage of the system. The product provided with a liquid level sensor also has a liquid level display function.

The invention provides a hydrogen fuel flow metering correction method based on a two-dimensional interpolation flow coefficient, and relates to the technical field of hydrogen turbine aero-engine control, and the method comprises the following steps: firstly, obtaining test data under different working conditions; then, a two-dimensional interpolation table of the flow coefficient is constructed based on the metering valve inlet pressure and the opening area after dead zone correction, the flow coefficient is monotonically decreased relative to the opening area by adjusting the dead zone area base value, and interpolation table shaping is completed; and finally, in real-time control, a flow coefficient is obtained by looking up a table through current working condition parameters, and a corrected metering valve opening area instruction is calculated through an iteration method. According to the method, the metering error of the hydrogen fuel mass flow is reduced from 30% to 3% or below through the flow coefficient of the dynamic matching working condition and dead zone correction, the flow metering and control precision is remarkably improved, and the problem that the theoretical mass flow error is large in existing sound velocity flow small hole node flow metering is solved.

Method for a supercharged power engine, comprising the following: Differentiate between a deterioration of a compressor return valve (CRV) throttle and a CRV position sensor based on both a throttle inlet pressure and the commanded position of the CRV throttle.

The utility model relates to the technical field of water treatment equipment, and discloses a portable emergency nanofiltration water purifier which comprises a handle, a piston assembly, a pressure regulating assembly, a nanofiltration membrane assembly, a pump body and a back pressure valve, the handle is connected with the piston assembly and the pressure adjusting assembly through pin shafts, and drives the piston rod to reciprocate when pressed; the pressure regulating assembly comprises a pressure regulating valve sleeve, a pressure regulating valve body, a pressure regulating valve element, a pressure regulating spring and a pressure regulating screw. The concentrated water discharge pressure p2 of the pressure regulating assembly can be set by regulating the pressure regulating screw, so that the concentrated water discharge pressure of the membrane assembly is controlled not to be lower than p2; the pump body is connected with the membrane component; the pump body is provided with a water inlet valve; the water inlet valve mainly comprises a spring and a water inlet valve core; the back pressure valve sets pressure p1 and is used for controlling the water inlet pressure of the membrane module not to be lower than p1; heavy metal and organic pollutants in raw water are efficiently removed by the nanofiltration water purifier, and meanwhile, mineral substances beneficial to a human body are partially reserved.

The invention discloses a roof bolter water-gas deslagging automatic switching control protection system and digging and anchoring complete equipment. The roof bolter water-gas deslagging automatic switching control protection system comprises a water-gas switching valve group, a gas inlet supply system, a water inlet supply system and an alarm display device. The water-gas switching valve group is used for switching between two working positions according to the conditions of air inlet pressure, water inlet pressure and cooling water pressure; and the water inlet supply system is independently communicated to enable the onboard roof bolter to carry out water deslagging, or the water inlet supply system and the air inlet supply system are simultaneously communicated to enable the onboard roof bolter to carry out water-air mixed deslagging, or the air inlet supply system is independently communicated to enable the onboard roof bolter to carry out air deslagging. And the alarm display device is used for displaying different abnormities and giving an alarm according to the air inlet pressure, the water inlet pressure, the cooling water pressure, the cooling water temperature, the return water pressure and the return water temperature under the action of the master control system. The system is wide in application range, the construction efficiency is improved, operation is simple and flexible, and monitoring and system protection are comprehensive.

The utility model provides a kind of dynamic balance valve, belong to valve field.It solves the problem of existing balance valve maintenance difficulty and unstable differential pressure.This dynamic balance valve, including the valve body that inside formation has fluid passage, flow regulating mechanism, self-balancing mechanism and fixed assembly, flow regulating mechanism includes exposed flow regulating hand wheel, flow regulating lever and stainless steel core, exposed flow regulating hand wheel design, automatic balancing mechanism includes diaphragm, differential pressure control sleeve, flow differential pressure guide rod and spring, fixed assembly includes E-type snap spring and multiple O-rings, wherein, the first end of spring abuts the differential pressure control sleeve, second end abuts valve body inner wall, drive the differential pressure control sleeve by diaphragm response inlet pressure change, linkage flow differential pressure guide rod compresses or releases the spring, drives stainless steel core dynamic regulation valve opening degree.The utility model has the advantages that manual maintenance is simple and differential pressure is stable.

The cleaning device comprises a water tank and a food material cleaning tank detachably arranged in the water tank and further comprises a fan and an air inlet pipe, an air inlet connector is arranged on the side wall of the food material cleaning tank, the air inlet pipe is arranged on the outer side wall of the water tank, and the first end of the air inlet pipe communicates with the air inlet connector; the side wall of the water tank is provided with an assembly opening for exposing the air inlet connector, the fan is arranged on the outer side wall of the water tank, and an air outlet of the fan is connected with the second end of the air inlet pipe. The first sensor is used for detecting the air inlet pressure of the food material cleaning tank; the second sensor is used for detecting the water inlet pressure of the food material cleaning tank; and the third sensor is used for detecting the water pressure in the food material cleaning tank. In the water inlet state, the fan power is controlled, the air inlet pressure is larger than or equal to the water inlet pressure, and water flow backward flowing is avoided; in the washing state, air enters the aeration channel and is blown through the aeration holes to form turbulent flow, and in the state, the air inlet pressure is larger than the water pressure in the food material cleaning tank, so that the aeration requirement is met, and water flow backward flowing is avoided.

The application relates to a performance analysis method of an advanced adiabatic compressed air energy storage system, which comprises the following steps: when the application scene is determined, the inlet pressure and temperature of a first compressor, the outlet pressure of a last compressor, the inlet pressure of a first expander and the outlet pressure of a last expander are known; the outlet temperature of the first compressor, the outlet temperature of the first expander, the pinch point temperature difference of a heat exchanger, the isentropic efficiency of each compressor and expander, the compressed mass flow, the compression time length, the expanded mass flow, the expansion time length are unknown; the outlet temperature of the last compressor, the inlet temperature of the first expander, the outlet temperature of the last expander and the polytropic efficiency of each compressor and expander are dependent variables of the known and unknown parameters; according to the relationship among the parameters, the compression power, the expansion power and the electric-to-electric efficiency are theoretically calculated, and the optimal scheme of the system performance of the advanced adiabatic compressed air energy storage is obtained in the shortest time cost and the least calculation cost.