1231 results about "Economizer" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The invention provides a solar energy-air energy composite heat pump system based on self-contained energy storage cascade application and a control method. The solar energy-air energy composite heat pump system comprises a heat pump host module, a solar module and a hydraulic module. Hot water generated by the solar heat collector is accumulated in the energy storage water tank and serves as an external heat source for active enhanced vapor injection to improve the performance of the heat pump. An active enhanced vapor injection device is designed for a heat pump host module, a refrigerant in an economizer absorbs heat of heat storage hot water, is jetted to a middle pressure cavity of a compressor and is converted into heating capacity, and the performance of the heat pump is greatly improved. When it is detected that the temperature in the heat storage water tank is reduced to a certain temperature, the flow direction of the heat storage hot water is switched through the switching assembly, the heat storage hot water is pumped to the heat pump fluorine-water heat exchanger for heat exchange, the heat pump performance is improved, and cascade application of the heat storage hot water is achieved. Refrigerant flows in the fin type heat exchanger and the fluorine-water heat exchanger are controlled by respective electronic expansion valves, and the opening degrees of the fin type heat exchanger and the fluorine-water heat exchanger are adjusted according to respective air suction superheat degrees, so that respective optimal heat exchange effects are realized.

The invention relates to the technical field of automatic control, and discloses an intelligent ash deposition prevention self-cleaning system for a flue of a low-temperature economizer of a coal-fired power plant. According to the system, data such as temperature, humidity and flue gas components in a flue are acquired in real time through the data acquisition module, the dust deposition condition and cleaning requirements of the flue are accurately evaluated, the omission phenomenon caused by misjudgment in the manual cleaning process is avoided, the data processing and analysis module improves the data processing precision, and the data processing and analysis efficiency is improved. The system can also monitor the running state of the flue in real time, so that a cleaning instruction is automatically sent out when necessary, the timeliness and effectiveness of cleaning work are ensured, the cleaning execution module can efficiently remove accumulated dust while reducing the temperature of the flue through a mode of combining high-pressure airflow, a vibration device and a water spraying system, the time needed by cleaning is remarkably shortened, and the cleaning efficiency is improved. And the monitoring feedback module evaluates the cleaning effect, it is ensured that each time of cleaning can reach the preset standard, and the intelligent level and safety of flue cleaning are further improved.

The utility model discloses a waste heat boiler ash removal device which comprises a waste heat boiler body, a coal economizer arranged in the waste heat boiler body and a spraying assembly arranged below or on the side face of the coal economizer, and a smoke inlet and a sewage outlet are formed in the lower portion of the waste heat boiler body. The spraying assembly comprises a plurality of spraying heads, each spraying head is provided with a water outlet hole and a dustproof column, the dustproof columns are matched with the water outlet holes to close or open the water outlet holes, the dustproof columns are in sliding fit with the water outlet holes, the sliding direction of the dustproof columns is parallel to the axial direction of the water outlet holes, and the dustproof columns are arranged on the spraying heads. And the water outlet hole is arranged towards the coal economizer. The ash removal device for the waste heat boiler is reasonable in structure, the spray header can be prevented from being blocked, the water outlet effect of the spray header each time is guaranteed, and therefore the cleaning effect on an economizer pipeline is guaranteed.

The invention provides a low-temperature heat pump liquid impact prevention and supercooling degree strengthening control method based on dual-mode self-adaptive regulation and control, which comprises the following steps: monitoring the bottom temperature of a gas-liquid separator and the change rate of the temperature, and controlling the supercooling degree of the gas-liquid separator on the basis of the difference value between the temperature and a preset safety critical temperature and the difference value between the change rate and a preset minimum temperature rise rate, constructing a liquid impact risk index; based on the liquid impact risk index, the pulse power excitation intensity is calculated, the number of opened spraying channels is selected according to the pulse power excitation intensity, the pulse duty ratio of each channel is adjusted, the high-temperature gas-state refrigerant is controlled to be injected into the bottom of the gas-liquid separator, and the liquid-state refrigerant is driven to evaporate; generating a mode switching score, and generating a mode switching signal when the mode switching score exceeds a mode switching threshold value and the temperature of the gas-liquid separator reaches a safety lower limit; and according to the mode switching signal, a supercooling degree strengthening mode is switched, and the opening degree of an economizer branch electronic expansion valve is adjusted according to the deviation between the current supercooling degree and the target supercooling degree.

The invention discloses a once-through boiler separator water inlet intelligent early warning method based on dynamic fusion of ceiling temperature, feed water temperature and separator pressure, and belongs to the field of thermal power plant unit once-through boiler operation control. According to the method, parameters such as the ceiling temperature, the economizer feed water temperature, the separator pressure change rate, the feed water flow and the steam flow are collected in real time, a dynamic enthalpy value calculation model is built to solve the separator inlet working medium enthalpy, and a water inlet risk index evaluation model is built. Setting a working condition self-adaptive coefficient according to different loads, and when the risk index absolute value is greater than or equal to 50, triggering an alarm to prompt to increase the fuel quantity and reduce the feed water flow. According to the method, the problem of misjudgment caused by excessive dependence of false water level compensation on the pressure change rate under the deep adjustment working condition is solved, the water inlet risk identification precision of the separator is improved, the early warning response time is advanced by 10-15 seconds, misoperation under the deep adjustment working condition can be effectively avoided, and the method is suitable for the deep peak regulation working condition of the supercritical / ultra-supercritical once-through boiler.

The invention relates to the technical field of waste heat recovery equipment, in particular to a sintering rotary furnace waste heat composite recovery structure which comprises a rotary furnace body, a boiler body, an energy saver and a flue gas treatment device. The two ends of the economizer are connected with a boiler body flue and the flue gas treatment device respectively, the flue gas treatment device comprises a compression cavity, a piston, a driving device, a water outlet, an exhaust port, a vortex tube and a recovery cavity, the compression cavity is communicated with the economizer through a throat pipe, the piston is located in the compression cavity and forms a moving pair with the compression cavity, and the driving device can drive the piston to move. The water outlet and the exhaust port are communicated with the compression cavity, the recovery cavity surrounds the outside of the compression cavity and is communicated with the hot air outlet of the vortex tube, four-time waste heat recovery is achieved through mutual cooperation of all the components, and the waste heat recovery efficiency is high.

The invention discloses a control method, device and equipment of a semi-dry method deacidification system and a medium, and relates to the technical field of household garbage incineration power generation treatment. Determining a prediction error value and inputting the prediction error value into a feedforward controller of the first PID controller; the feed-forward controller determines a lime slurry flow feed-forward compensation value according to the prediction error value; based on the lime slurry flow feedforward compensation value, a lime slurry flow error compensation value output by a main controller of the first PID controller and the actually measured lime slurry flow serving as a disturbance compensation value, a first control instruction used for controlling the opening degree of a lime slurry adjusting valve is output through an auxiliary controller of the first PID controller. The method is suitable for a control scene of a semi-dry deacidification process.

The invention relates to the technical field of heat pump air conditioning systems, and discloses an enthalpy increasing control method for a heat pump system, which comprises the following steps: under the condition of operating in an enthalpy increasing mode, acquiring a first target exhaust temperature and a suction superheat degree of a compressor and an economizer inlet and outlet state; under the condition that the inlet and outlet state of the economizer meets the enthalpy increasing onset condition, the opening degree of a main electronic expansion valve is adjusted according to the suction gas superheat degree so that the suction gas superheat degree can be within the suction gas superheat degree range; and the opening degree of the auxiliary electronic expansion valve is adjusted according to the first predicted exhaust temperature and the first target exhaust temperature so that the first predicted exhaust temperature can reach the first target exhaust temperature. The method can maximize the heating capacity of the heat pump system and ensure the operation stability of the heat pump system. The invention further discloses an enthalpy increasing control device for the heat pump system and the heat pump system.

The utility model discloses an economizer assembly and an air conditioning system. The economizer assembly comprises a heat exchanger, a main path inlet pipeline, a main path outlet pipeline, an auxiliary path inlet pipeline, an auxiliary path outlet pipeline and a throttling device, and a first flow channel and a second flow channel which are independent of each other are arranged in the heat exchanger; the main path inlet pipeline and the main path outlet pipeline are connected to a first liquid inlet and a liquid outlet of the heat exchanger respectively, one end of the auxiliary path inlet pipeline is communicated with the main path inlet pipeline, the other end of the auxiliary path inlet pipeline is connected with a second liquid inlet of the heat exchanger through the throttling device, and the auxiliary path outlet pipeline is connected with an air outlet of the heat exchanger. Based on the economizer assembly, the performance and reliability of the economizer are effectively improved, and the stability of the air conditioning system is enhanced.

The invention discloses a grey wolf algorithm flue gas waste heat control method and system introducing exhaust gas temperature prediction constraint, and the method comprises the steps: firstly building a thermodynamic simulation model of a flue gas waste heat system, collecting the working condition data of a unit in real time, and calibrating the model; under the targets of power supply coal consumption minimization, waste heat recovery rate maximization and the like, an exhaust gas temperature prediction result is used as a dynamic constraint, a grey wolf optimization algorithm is adopted to carry out multi-target optimization on parameters such as the opening degree of a flue gas baffle, the water supply distribution proportion of an economizer and the water flow of an air heater, and multiple regression or a BP neural network model is utilized to predict the exhaust gas temperature. If the predicted value is lower than the safety lower limit, dynamically adjusting the search direction to avoid an infeasible solution; and an optimization result is issued on line through a DCS system, and closed-loop control is realized. Compared with the prior art, on the premise that the safety of the exhaust gas temperature is guaranteed, the waste heat utilization rate is remarkably increased, power supply coal consumption is reduced, the capacity of adapting to different coal qualities and load fluctuations in a self-learning mode is achieved, and the good engineering application prospect is achieved.

The utility model relates to the technical field of coke oven heating, in particular to an economical single-hole combustion chamber temperature adjusting device, which is characterized in that the input end of each heating gas unit I and the input end of each heating gas unit II are respectively connected with a heating gas main pipe; the output end of each first coal gas heating unit and the output end of each second coal gas heating unit are connected with the corresponding combustion chamber, one end of each adjusting unit is connected with the corresponding first coal gas heating unit, and the other end of each adjusting unit is connected with the corresponding second coal gas heating unit. The utility model has the advantages that the structure realizes the communication of the two heating gas main pipes, one regulating valve can be adopted to complete the flow regulation of the two gas heating pipes in the same combustion chamber, and the on-line maintenance and manual regulation are realized by changing the opening position of the T-shaped plug valve; the regulating valve is connected with the stop valve through the three-way connector, it is guaranteed that the regulating valve can be detached at any time when breaking down, and normal production is not affected.

The invention relates to the technical field of new energy automobile heat management, and belongs to a variable heat return quantity heat management system based on a new energy automobile R290 refrigerant, which can realize the functions of a refrigeration mode, a heat pump heating mode, a hot gas bypass mode and the like. The intermediate heat exchanger is used as a forced supercooling section and a heat regenerator of a water-cooling condenser in a refrigeration mode, and is used as an economizer in a heating mode; through the bypass ERV + EXV throttling mode, the refrigerant flow passing through the intermediate heat exchanger can be dynamically adjusted according to different compressor rotating speeds and suction superheat degrees, and the problem that the suction superheat degree is large when the intermediate heat exchanger is matched with different refrigerant flows is solved. The air suction superheat degree can be accurately adjusted, the COP is improved compared with a traditional system, and meanwhile the reliability of the compressor is guaranteed.

The utility model discloses a wide-channel plate type low-temperature economizer drainage device, and relates to the technical field of economizers. Comprising a water collecting tank arranged at the bottom of the economizer, the top face of the water collecting tank is fixedly connected and communicated with a plurality of water inlet assemblies, each water inlet assembly corresponds to and is communicated with one heat exchange plate, the center of the bottom of the water collecting tank is fixedly connected and communicated with a drainage pipe, and a first control valve is installed on the drainage pipe. The water collecting tank can be communicated with the bottoms of the heat exchange plates through the water inlet assembly, when the coal economizer is shut down, water in all the heat exchange plates installed in the coal economizer can be discharged by opening the first control valve, the water in heat exchange plate cavities can be discharged when the coal economizer is shut down, and the heat exchange plate cavities are prevented from being blocked. Water stored in the heat exchange plate cavity is effectively prevented from corroding the heat exchange plate cavity, and the service life of the economizer is effectively prolonged.

The invention provides an air-suspension variable-frequency centrifugal water chilling unit shutdown device and a control method. The shutdown device is installed on an air-suspension variable-frequency centrifugal water chilling unit system. The air-suspension variable-frequency centrifugal water chilling unit system comprises an evaporator, a compressor, a condenser, a first-stage throttling valve, an economizer, a second-stage throttling valve, a hot gas bypass valve and a shutdown valve, wherein the hot gas bypass valve is connected with the condenser and the evaporator, and the shutdown device comprises a compressor and a shutdown valve. The compressor has the beneficial effects that the pressure balance pipeline and the shutdown valve need to be arranged on the compressor, the shutdown valve is arranged at the proper position in the pressure balance pipeline, and the pressure balance pipeline is used for communicating the exhaust pipeline of the compressor with the air inlet pipeline; and high pressure in the exhaust pipeline is discharged to the low pressure side of the air inlet pipeline, so that permanent damage to a compressor bearing and a sealing system caused by back flushing of gas in the exhaust pipeline to the compressor is avoided, and the service life of the compressor is guaranteed.

The invention relates to a direct current furnace machine-furnace coordination system dynamic modeling method suitable for a wet condition. Based on the law of mass conservation and energy conservation, a lumped parameter method is adopted to construct a dynamic model comprising a coal pulverizing system, a coal economizer-water wall system, a water storage tank system, a superheater system and a steam turbine system; identifying parameters are optimized step by step by only utilizing unit variable load dynamic operation data and combining with the mechanism constraint that the heat absorption capacity of a working medium is monotonically increased along with the coal quantity as fired: static parameters are determined through dynamic data regression, nonlinear parameters are optimized based on a preset water-cooled wall outlet flow and dryness function structure, and the heat absorption capacity of the working medium is calculated. And finally, identifying dynamic parameters step by step by adopting an immune genetic algorithm. The dynamic characteristics and the physical consistency of the established model are verified through open-loop simulation, and the technical problems that dynamic description of the water level of the water storage tank is missing and the modeling precision is low under the wet working condition are solved.

The utility model discloses a boiler economizer heat exchange pipeline anti-abrasion device which comprises a heat exchange pipe, a V-shaped anti-abrasion plate is installed on the top of the heat exchange pipe, a plurality of heat exchange fins are installed on the heat exchange pipe and located below the V-shaped anti-abrasion plate, a plurality of installation holes are formed in the V-shaped anti-abrasion plate, the boiler economizer heat exchange pipeline anti-abrasion device further comprises a clamping and blocking strip, an elastic buckle is installed at the bottom of the clamping and blocking strip, and the clamping and blocking strip is connected with the V-shaped anti-abrasion plate. And the elastic buckle is clamped in the mounting hole. The V-shaped anti-abrasion plate is additionally arranged at the top of the heat exchange tube, so that the top of the heat exchange tube is prevented from being impacted and abraded by flue gas and is prevented from being damaged; a plurality of blocking strips are mounted on the V-shaped anti-abrasion plate, so that dust is accumulated on the surface of the V-shaped anti-abrasion plate, the purpose of abrading materials by the materials is achieved, and the loss of the V-shaped anti-abrasion plate is reduced; the clamping strip is mounted at the mounting hole through the elastic buckle, and the inclined block in the elastic buckle is pushed out through the abutting block, so that after the clamping strip is damaged, the inclined block can continuously stop smoke, and the elastic buckle can be continuously pressed downwards to fall off to be replaced with a new clamping strip.

The invention relates to the technical field of flue gas denitration, in particular to an accurate ammonia injection optimization method based on numerical simulation and a related device.According to the method, an SCR denitration flue three-dimensional model comprising detailed parts such as an economizer outlet flue, a denitration ammonia injection grid, a flow guide plate, a rectification grid, a catalyst and a denitration outlet partition is established; the method comprises the following steps: simulating a denitration flue gas flow field through a CFD numerical value, carrying out statistical analysis on an influence range of SCR denitration ammonia injection grid partitions and an ammonia flow area, obtaining an influence coefficient of each denitration ammonia injection grid partition on each denitration outlet partition, and calculating the denitration outlet partition on the basis of the influence coefficient of each denitration ammonia injection grid partition on each denitration outlet partition. According to the method, the ammonia injection adjustment amount of each denitration ammonia injection grid partition is calculated, a self-adaptive ammonia injection optimization system is formed, it is ensured that the NO concentration distribution of each partition of a denitration outlet is uniform, ammonia escape of the denitration outlet is reduced, and the problem that in the prior art, an SCR denitration ammonia injection optimization method is low in precision and accuracy is solved.

The present application belongs to the technical field of heat pump air conditioner performance detection, and particularly relates to a heat pump air conditioner system economizer performance test system and test method. The test system comprises a first pressure transmitter arranged between a liquid accumulator and an economizer, a first mass flow meter arranged at the inlet of an electronic expansion valve, and a third pressure transmitter arranged between an evaporator and a gas-liquid separator of a heat pump air conditioner system to be tested. A first temperature transmitter is arranged along the main path pipeline connected to the economizer inlet direction, and a second temperature transmitter is arranged along the economizer outlet direction on the main path pipeline. A third temperature transmitter is arranged along the auxiliary path pipeline connected to the economizer inlet direction, and a fourth temperature transmitter, a second pressure transmitter and a second mass flow meter are sequentially arranged along the economizer outlet direction on the auxiliary path pipeline. The test system fills the gap of the current heat pump air conditioner system economizer performance test device and test method, and is conducive to promoting the development and application of heat pump air conditioner technology.

The invention discloses a method and system for controlling PM emission concentration of a coal-fired unit, and belongs to the technical field of coal-fired power generation. According to the method for controlling the PM emission concentration of the coal-fired unit, the inlet PM concentration, the slurry circulation flow and the inlet flue gas flow velocity of a wet flue gas desulfurization system, the flue gas temperature and the flow velocity of an outlet of a low-temperature economizer and the real-time load of the coal-fired unit are comprehensively considered, and an accurate feed-forward instruction is generated; according to the method, a feedforward instruction and a main instruction calculated by a PID (Proportion Integration Differentiation) control algorithm are combined to dynamically and accurately adjust the dust removal voltage of the electric dust removal system, so that the PM emission concentration of a coal-fired unit is effectively controlled, and the coal-fired unit can keep stable emission performance even in a frequent load change or low load operation state.

The present invention relates to the field of flue gas purification technology, specifically to a flue gas purification device and control method that uses a calcium-based absorbent and a sodium-based absorbent in combination. The flue gas purification device includes an incinerator, a transition flue, a pre-dust hopper, a dry deacidification tower, a dust and nitrate integrated device, an external economizer, an induced draft fan, and a chimney, which are sequentially connected through a flue. The incinerator is connected to a calcium-based absorbent injection system, the dry deacidification tower is connected to a sodium-based absorbent injection system and an activated carbon injection system, and the dust and nitrate integrated device inlet is connected to an SCR reducing agent preparation system. The present invention sprays calcium-based absorbent into the region where the flue gas temperature of the incinerator is 350-550°C for primary deacidification, thereby reducing floor space and being suitable for projects with relatively compact layouts. It can reduce equipment investment and the operating resistance of the smoke and air system, reduce the amount of fly ash generated and the cost of fly ash disposal, improve the utilization rate of calcium-based absorbents, and reduce the amount of sodium-based absorbents used.

The invention belongs to the technical field of boiler waste heat, gas and pressure utilization, and particularly relates to a lifting type intelligent soot blowing system and method for low-temperature area deposited soot, and the soot blowing system comprises a primary air pressurization soot blowing system, a vertical guide rail advancing soot blower and an intelligent control module. And the intelligent control module uses a blockage prediction intelligent algorithm and a dynamic soot blowing strategy. The primary air pressurization soot blowing system leads out part of dust-free primary air from an outlet of a boiler air pre-heater to serve as soot blowing primary air, and the dust-free primary air is conveyed to a lifting soot blower driven by a vertical guide rail after being pressurized to 0.5-0.8 MPa. The primary air pressurization soot blowing system is deeply coupled with the low-temperature economizer warm flue gas system, primary air is used as a soot blowing medium, the temperature of the soot blowing medium is about 320-350 DEG C, ammonium bisulfate condensate can be effectively dried and removed, and fly ash adhesion is reduced; and the soot blowing coverage rate reaches 100%, soot blowing according to needs is achieved, and the operation stability and economical efficiency of the unit are remarkably improved.

The utility model belongs to the technical field of flue gas denitration purification, and particularly relates to a coal-fired boiler SCR denitration ultra-low emission device which comprises an SCR layer, a first-stage economizer, a gas flow uniform distribution device, a second-stage economizer and an ammonia water / urea solution tank, and is characterized in that the ammonia water / urea solution tank is communicated with a pyrolysis gasification device; the pyrolysis and gasification device is connected with an ammonia spraying grid through an air duct, the ammonia spraying grid is arranged in a flue behind the first-stage economizer, the pyrolysis and gasification device is sequentially connected with heat exchange equipment I and heat exchange equipment II through pipelines, and the heat exchange equipment II is arranged in a flue behind the second-stage economizer or a flue behind the SCR layer; and the pyrolysis gasification device is communicated with a compressed air pipe. The NOx-containing flue gas purification device can efficiently purify NOx-containing flue gas, and is reliable in operation, low in investment and operation cost, long in service life and free of secondary pollution.

The utility model relates to a heat exchange plate and a coal economizer, the heat exchange plate is used for being installed on the coal economizer to exchange heat with high-temperature flue gas, the heat exchange plate comprises a first plate body and a second plate body, and a first channel for heat exchange medium circulation is formed between the first plate body and the second plate body; the first plate body and the second plate body are respectively provided with a first side in contact with the high-temperature flue gas, and the surface of the first side of the first plate body and the surface of the first side of the second plate body are respectively provided with an anti-corrosion layer. By means of the technical scheme, the heat exchange structure of the economizer is arranged to be in the plate shape, so that the anti-corrosion layer is arranged on the side, close to high-temperature flue gas, of the heat exchange plate so as to reduce the possibility that when the flue gas temperature is lower than the dew point temperature, sulfuric acid steam in the flue gas is condensed and combined with water vapor to form sulfuric acid, and the heat exchange plate is corroded; and the durability of the heat exchange plate is improved.

The invention provides a screw compressor and a refrigerating system with the screw compressor. A second noise elimination reaction cavity is formed in the position, close to a first noise elimination reaction cavity, of an economizer pipeline for connecting the economizer and the compressor. Pressure pulsation in the economizer pipeline is mainly generated by large pressure difference between refrigerant gas in the compression containing cavity and refrigerant gas in the economizer pipeline, and the distance between the second noise elimination reaction cavity and the first noise elimination reaction cavity is controlled. Different sizes of the silencer reaction cavities are designed according to the operation condition of the compressor, so that the pressure pulsation transmitted from the compression cavity of the compressor can realize good pressure pulsation attenuation within the first-order and second-order target frequency range of the concerned rotating speed after passing through the first silencing reaction cavity and the second silencing reaction cavity; the effective pulsation attenuation frequency range is widened to a great extent so as to adapt to pressure pulsation generated by the compressor under different frequency working conditions.

The utility model provides a stand-alone system air suspension frequency conversion centrifugal water chilling unit which comprises a circulation main loop formed by connecting an evaporator, an air suspension centrifugal compressor, a condenser and an economizer through refrigerant pipelines so as to form a refrigeration circulation loop; wherein throttling pipelines are respectively arranged on a refrigerant pipeline between the condenser and the economizer and a refrigerant pipeline between the economizer and the evaporator, so that secondary throttling is carried out on a liquid refrigerant in the refrigerant pipelines; one end of the air supply pipeline is communicated with the economizer, and the other end of the air supply pipeline is communicated with the air suspension centrifugal compressor; the variable-frequency cooling pipeline comprises a frequency converter, one end of the frequency converter is communicated with the condenser through a frequency converter cooling liquid inlet pipeline, and the other end of the frequency converter is communicated with the evaporator through a frequency converter cooling air return pipeline. The unit provided by the utility model can effectively improve the refrigeration efficiency and performance, and reduce the energy consumption and operation cost, thereby realizing the efficient, energy-saving and environment-friendly refrigeration effect.

A mixed mode modular cooling system can include two or more mixed mode refrigerant loops and plumbing to permit a working fluid to circulate through at least a portion of the loops. Each mixed mode refrigerant loop can include an evaporator, a condenser, a pump to pump a refrigerant through the evaporator and the condenser, and a compressor configured to compress the refrigerant between the evaporator and the condenser. As cooling demand varies, each mixed mode refrigerant loop can be brought online and operated in either compressed refrigerant mode or pumped refrigerant mode.

The invention belongs to the technical field of waste heat recovery, and discloses a waste heat utilization method for synergistically preventing blockage and corrosion through a low-temperature economizer. Comprising the steps that multi-source sensing data, including a flue gas temperature distribution set, a flow velocity distribution set and a component parameter set, in a flue gas channel in the operation process of the low-temperature economizer are obtained; acquiring a temperature margin according to the flue gas temperature distribution set, and performing risk analysis in combination with the flow velocity distribution set and the component parameter set to obtain a blockage risk factor and a corrosion risk factor; a comprehensive risk distribution diagram is constructed based on the heat exchange area, area division is conducted on the heat exchange surface, and a heat exchange area division mode is obtained and dynamically adjusted; the heat exchange efficiency and the waste heat utilization efficiency are obtained, and secondary dynamic adjustment is conducted on the heat exchange partition mode till a preset adjustment rule is met; according to the method, accurate risk assessment is achieved through multi-parameter monitoring and fusion analysis, dynamic partition optimization is adopted, the limitation of traditional protection measures is solved, and the reliability and economical efficiency of system operation are remarkably improved.

The invention provides a circulating fluidized bed boiler load self-adaptive control system and method, and belongs to the technical field of circulating fluidized bed boiler load self-adaptive control. In order to realize in-boiler temperature regulation based on dynamic conveying of settled ash in a boiler and realize efficient active matching of heat transfer capability in a quick response load process of the boiler, the technical scheme is that the top of a hearth of the circulating fluidized bed boiler is communicated with the top of a cyclone separator through a coal ash recovery pipeline, and the top of the cyclone separator is connected into a tail flue; an economizer is arranged in the middle of the tail flue, and a flue outlet is formed in the bottom of the tail flue; the bottom of the cyclone separator is connected with a circulating ash returning device through an outlet pipeline, a settled ash conveying hole is formed in the upper part or the side part of the circulating ash returning device, and a conveying pipeline is welded on the outer side of the settled ash conveying hole and is connected with the bottom of a hearth of the circulating fluidized bed boiler; the method is used for self-adaptive control of the load of the circulating fluidized bed boiler.

The invention discloses an energy efficiency online control air conditioning unit which comprises a compressor, a condenser, an economizer and an evaporator which are connected together to form a refrigeration cycle, and further comprises a plurality of pressure sensors, a plurality of temperature sensors, a frequency converter and a controller. The frequency converter is connected with the compressor and the controller and feeds back the real-time output power output by the frequency converter to the compressor to the controller. The pressure sensors and the temperature sensors are connected with the controller and used for detecting the refrigerant pressure and temperature of multiple positions in the refrigeration cycle and transmitting the refrigerant pressure and temperature to the controller. And the controller calculates according to the refrigerant pressure, the temperature and the real-time output power according to energy conservation and mass conservation to obtain the refrigerating capacity or the heating capacity and the unit energy efficiency under the corresponding operation working conditions. The refrigerating capacity or the heating capacity and the energy efficiency of the unit are solved in real time according to the refrigerant side state parameters, the energy conservation principle and the mass conservation principle, the dependence on historical data is reduced compared with a neural network model algorithm, and the detection consistency and accuracy are improved.