465 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 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 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 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 invention relates to the technical field of computers, in particular to a low-temperature economizer digital twinborn body construction method, and aims to solve the problems that an existing model statically solidifies, multi-source data fusion is difficult, and degradation recognition lags. The method comprises the following steps: constructing a multi-physical field reference model covering fluid, heat transfer and corrosion mechanisms; collecting and carrying out time-space alignment on temperature, pressure, flue gas components and ash deposition data, and combining wavelet and median filtering to carry out de-noising; introducing extended Kalman filtering to correct model state variables on line, and realizing dynamic updating of parameters; a CNN-GRU hybrid network is embedded to extract time sequence degradation features, and unsupervised clustering is combined to identify working condition states; and when the detection is abnormal, triggering local high-fidelity CFD re-simulation, and completing closed-loop optimization and state synchronous mapping. Through the mechanism, the internal physical field error lt of the equipment is realized; 5% high-precision dynamic mapping, more than 95% of anomaly detection rate and rapid deployment of a new unit within 72 hours are realized, the prediction accuracy and preventive maintenance capability are remarkably improved, and the service life of equipment is prolonged by 15%-20%.

The utility model relates to an air conditioning unit capable of being disassembled and assembled. The air conditioning unit comprises a heat management module, a base module and a condenser module. The heat management module is fixed to the base module through a support, and the condenser module is connected with the heat management module through an air pipe and a liquid pipe. The heat management module comprises an evaporator, a compressor and an economizer; the condenser module comprises a condenser, a condensation fan and a supporting frame. Thus, the structural design of the air conditioning unit is innovatively improved, the air conditioning unit is disassembled into three independent units including the heat management module, the base module and the condenser module, split type modular design is adopted, and the functions of rapid disassembly and assembly of all the modules are achieved.

The invention discloses a boiler flue gas temperature compound control method and system based on multiple regression, and belongs to the field of thermal power generation boiler control. The method adopts a feedforward-feedback composite control structure, and comprises the following steps: generating a feedforward control signal through a pre-trained multiple regression model; meanwhile, based on the deviation between the actual smoke temperature and the target smoke temperature, a feedback control signal is generated through a PID controller; and combining the feedforward control signal with the feedback control signal to generate a final control instruction for coordinating and controlling a first flue gas baffle and a second flue gas baffle on parallel flues at an outlet of a boiler economizer. The baffles are controlled in a coordinated mode, the flue gas flow proportion of different heat exchange degrees is changed, and then the temperature of the mixed flue gas is accurately controlled. The prediction capability of the model and the rectification capability of PID are combined, the response speed and precision of the control system are improved, and the robustness of the system under the variable fuel ratio working condition is enhanced.

This invention discloses a boiler load adaptive regulation system based on solid thermal storage, relating to the field of power plant boiler combustion technology. The invention includes a boiler with an economizer arranged in its tail flue, and a flue gas extraction pipe connecting the boiler and the economizer. The end of the flue gas extraction pipe is connected to an ash separation component, the outlet of which is connected to the flue gas inlet of a solid thermal storage component, and the flue gas outlet of the solid thermal storage component is connected to the air preheater inlet. This invention extracts high- and medium-temperature flue gas from different locations in the boiler during rapid load reduction, stores the heat from the high-temperature flue gas using solid thermal storage technology, and releases the heat from the solid thermal storage component when rapid load increase is needed. This heat is then used to increase the primary air temperature and pulverized coal temperature through a heat exchanger, enhancing the combustion intensity of pulverized coal in the furnace. By reducing the amount of high-temperature flue gas in the boiler, the load change rate of the unit is effectively improved.

The utility model discloses a power plant waste heat comprehensive utilization system, and relates to the technical field of energy conservation and environmental protection. According to the technical key points, the system comprises a warm air blower connected with an indirect air cooling system, and the warm air blower is installed on the inlet side of a first induced draft fan; an air outlet of the first induced draft fan is connected with one end of the air side of the air preheater, and the other end of the air side of the air preheater is connected with the boiler; one end of the smoke side of the air preheater is connected with a flue at the tail of the boiler, and the other end of the smoke side of the air preheater is connected with an air inlet of the low-pressure economizer; a gas outlet of the low-pressure economizer is connected with the tail gas treatment module. According to the scheme, the exhaust steam waste heat of the steam turbine and the exhaust smoke waste heat of the boiler are comprehensively utilized at the same time, so that the two parts of waste heat are utilized to the greatest extent, the coal consumption of a power plant is reduced, and meanwhile, the heat pollution to the environment can be reduced.

The invention belongs to the field of energy conservation and consumption reduction of a gas boiler heat supply gas turbine power plant. The current gas-fired boiler adopts thermal deoxidization to control water supply and oxygen dissolution, water is supplied to a deaerator from an outlet of a secondary energy saver, the smoke exhaust temperature is about 60 DEG C, and waste heat is not fully utilized. Therefore, a novel pipeline system is constructed, a traditional heat exchange process is subverted, and exhaust smoke waste heat is utilized to the maximum extent through multiple heat exchange. The system comprises two sets of schemes adaptive to different operation states, and the schemes can be flexibly switched. When the gas-fired boiler runs, water supplied from an outlet of the secondary energy saver is led to the double-tube heat exchanger of the pressure regulating station, and returns to the primary energy saver after heat exchange to replace a water bath furnace to heat natural gas, so that the heating effect is guaranteed, gas is saved, and the water temperature of an inlet of the primary energy saver is reduced. When the gas turbine runs, one path of feed water is led to the double-tube heat exchanger from the low-pressure feed water secondary heater, and the feed water returns to the condenser after heat exchange, so that the gas consumption of the water bath furnace in low-temperature climate is saved, and more smoke exhaust waste heat is utilized in other climate. The two modes both can reduce the exhaust gas temperature, and are efficient in utilization, energy-saving, emission-reducing, green and environment-friendly.

The embodiment of the invention discloses a solid waste bottom slag waste heat utilization circulating fluidized bed boiler system which comprises a boiler body and an air-water slag cooler, the boiler body is provided with a discharge port and an air return port, the discharge port is used for discharging high-temperature bottom slag outwards, the air return port is used for conveying air into the boiler body, and the air-water slag cooler is used for cooling the air-water slag cooler. The air-water slag cooler comprises a shell and an economizer, the shell communicates with the discharge outlet so as to be used for receiving high-temperature bottom slag discharged from the boiler body, and the shell is provided with an air inlet so as to be used for conveying air into the shell; the economizer is arranged in the shell and used for recycling flue gas waste heat emitted by the high-temperature bottom slag and can convert air conveyed into the shell into hot air, and the hot air converted by the economizer can be circularly conveyed into the boiler body through the air return opening. According to the circulating fluidized bed boiler system utilizing the waste heat of the solid waste bottom slag, waste of heat energy is reduced by recycling the waste heat of the high-temperature bottom slag, and the overall heat efficiency of the boiler is improved.

The application provides a generator set deep peak regulation system and method, wherein the generator set deep peak regulation system comprises a gas turbine power generation unit, a waste heat boiler, an economizer and an SCR denitration device; the gas turbine power generation unit is suitable for forming high-temperature flue gas and generating power through the high-temperature flue gas; the waste heat boiler is suitable for recovering heat in tail flue gas of the gas turbine power generation unit; the economizer is suitable for recovering heat in tail flue gas of the waste heat boiler; and the SCR denitration device is suitable for removing nitrogen in tail flue gas of the economizer; wherein the economizer has a flue gas bypass which is in communication with the gas turbine power generation unit and is suitable for mixing tail flue gas of the gas turbine power generation unit with inlet flue gas of the SCR denitration device to adjust the inlet flue gas temperature of the SCR denitration device. According to the above scheme, the problem that the water power safety and efficiency of the boiler are reduced due to the reduced heat exchange of the economizer in the existing generator set deep peak regulation process can be solved.

A compact freezer unit for supplying conditioned air to the interior of a structure is provided herein. The compact freezer unit includes a housing containing one or more components of the freezer unit, the housing having dimensions of height, width, and depth. The components include an evaporator comprising one or more coils and an evaporator fan, a condenser and a condenser fan, a Direct Current (DC) Enhanced Vapor Injection (EVI) inverter compressor, an economizer for separating liquid and vapor refrigerant, a 4-way valve and a chassis belt electric heater configured to defrost one or more surfaces, one or more sensors for sensing a condition and generating an output signal received by a controller, and a plurality of refrigerant lines fluidly connecting the condenser and the evaporator.

This utility model discloses a single-channel positive pressure gas waste heat boiler, specifically relating to the field of boiler technology. It includes a steam drum, a steam collector, a boiler body, and a pressure-bearing shell. The entire boiler body is housed within the circular pressure-bearing shell, while the steam drum and steam collector are located outside the shell and connected to the boiler body inside the shell via connecting pipes. The pipes are sealed at their penetration points into the shell. The boiler body is divided into upper and lower sections. The upper high-temperature zone is surrounded by a constant-temperature membrane water-cooled wall, while the lower low-temperature zone is constructed from welded steel plates. Two gas outlets connect the lower flue outlet to the pressure-bearing shell, forming a connecting layer. The inner wall of the pressure-bearing shell is insulated. A high-temperature superheater, a low-temperature superheater, and an evaporator are sequentially arranged at the top of the boiler body, while an economizer is arranged at the bottom. This utility model solves the problem of arranging the pressure-bearing and heating surfaces in traditional boilers, offering advantages such as reduced sealing difficulty, optimized heat exchange process, pressure balance, simplified insulation, and improved safety and energy efficiency.

The present application relates to the technical field of flue gas waste heat recovery of thermal power generation, and provides a low-low-temperature coal economizer flue gas waste heat recovery device and system, which comprises a collection module for processing sensor signals to generate preprocessed data packets; a twin module for performing simulation based on the data packets to output a flow field atlas; an analysis module for evaluating the atlas to output a flow field uniformity index and a wear and corrosion risk distribution map; a coordination module for optimizing calculation with the three indexes as targets to output a set of deflector angle adjustment instructions; a regulation and control module for driving a deflector array to perform angle adjustment; and a monitoring module for identifying leakage based on humidity data and controlling an isolation valve. Through the construction of a main control closed loop of "perception-simulation-optimization-execution" and an independent leakage safety closed loop, dynamic shaping of the flue gas flow field, coordinated inhibition of the wear and corrosion risk, and rapid isolation of sudden leakage are realized, thereby improving the system operation reliability.

The invention discloses a system and method for improving the summer operation performance of a gas-steam combined cycle unit, and the system is characterized in that an expanded economizer is arranged in a waste heat boiler unit of the gas-steam combined cycle unit, and is connected with the generator side of an absorption heat pump unit through a waste heat water circulation pipeline; a waste heat water circulating pump is arranged in the waste heat water circulating pipeline; an air inlet cooling heat exchanger is arranged in an air compressor inlet pipeline of a gas turbine of the gas-steam combined cycle unit, the air inlet cooling heat exchanger is further connected with the evaporator side of the absorption heat pump unit through a chilled water circulation pipeline, and a chilled water circulation pump is arranged in the chilled water circulation pipeline. The condenser side of the absorption heat pump unit is connected with a heat supply network water pipeline, and a heat supply network water circulating pump is arranged in the heat supply network water pipeline. According to the scheme, the summer peak load capacity of the gas-steam combined cycle unit is improved, cascade efficient utilization of energy is achieved, the economical efficiency and the environmental protection property are improved, and collaborative cooling and heating are achieved.

The application discloses a heat pipe type low-temperature economizer with triple isolation structure coupling, which comprises a plurality of heat pipes, a plurality of water condensation sleeve pipes, sealing partitions and elastic sealing layers, heat pipes are arranged on the sealing partitions and fixedly connected, the outer part of the condensing section of the heat pipes is sleeved with the water condensation sleeve pipes, annular closed cooling water channels are formed between the water condensation sleeve pipes and the outer walls of the heat pipes, two adjacent cooling water channels are communicated through communicating pipes, the lower side of the sealing partition is provided with the elastic sealing layer which is sleeved on the heat pipe, and the water condensation sleeve pipe, the sealing partition and the elastic sealing layer jointly form a triple isolation sealing structure. Compared with the prior art, the overall operation reliability and service life of the low-temperature economizer can be greatly improved.

The invention discloses a hot primary air graded heating system of a positive-pressure direct-blowing coal pulverizing system and an operation method, and the system comprises a flue gas-air heat exchanger, a flue gas leading pipeline, a flue gas backflow pipeline, and an air pre-heater, a hot primary air pipeline and a coal pulverizing system which are connected in sequence, an air flow channel inlet of the flue gas-air heat exchanger is connected with a hot primary air outlet of the air pre-heater through a hot primary air pipeline; the flue gas and air heat exchanger is provided with an air flow channel and a flue gas flow channel which are isolated from each other, an air flow channel outlet of the flue gas and air heat exchanger is connected with a hot primary air inlet of the coal pulverizing system through a hot primary air pipeline, and the flue gas leading and conveying pipeline is connected with a flue smoke taking opening and a flue gas flow channel inlet of the flue gas and air heat exchanger. The flue gas backflow pipeline is connected with a flue gas flow channel outlet of the flue gas and air heat exchanger and a flue flue gas backflow opening; the temperature of hot primary air can be effectively increased, waste heat of high-temperature flue gas in front of the coal economizer can be fully recycled, and meanwhile the adaptability of the system to coal type changes and load fluctuations is enhanced.

The utility model relates to the technical field of boilers, in particular to a pre-drying high-moisture fuel boiler which is characterized in that a boiler hearth comprises a hearth body and an extending hearth, the extending hearth is arranged on one side of the hearth body and communicated with the hearth body, and a fire grate is arranged in the boiler hearth. The boiler hearth inner cavity comprises a pre-drying part, a main combustion part and a burn-out part which are sequentially arranged from left to right; the pre-drying part corresponds to the extending hearth, a gas supply assembly is arranged at the position, corresponding to the pre-drying part, of the bottom of the boiler hearth, the gas supply assembly comprises a smoke cover and a smoke air duct, the smoke cover corresponds to the pre-drying part, one end of the smoke air duct is arranged at the bottom of the smoke cover and communicates with the smoke cover, and the other end of the smoke air duct communicates with the economizer; a feeding cover is fixedly arranged on the outer side of the extending hearth, and an anti-explosion door is arranged at the top of the extending hearth. High-moisture fuel entering the boiler hearth is pre-dried, the humidity of the high-moisture fuel is reduced, and it is guaranteed that the high-moisture fuel is fully combusted in the boiler hearth.

This invention discloses a protective sleeve for economizers in waste heat boilers to prevent low-temperature corrosion, belonging to the field of economizer protective sleeves. It includes two pipe heads, which are fixedly connected to each other by a corrugated pipe. Multiple rotating heads are fixedly connected to the outer wall of each pipe head. A folding pull rod is rotatably mounted on the outer wall of each rotating head via a pivot. A second rotating head is rotatably mounted on the top of each folding pull rod via a pivot. A connecting column is provided between two opposite rotating heads. The device is highly adaptable, easy and efficient to install, and can be adapted to economizer pipes of different lengths and specifications without cutting. The length can be flexibly adjusted through the cooperation of the pipe head and the corrugated pipe. After unfolding, it can be slightly shortened by the action of the connecting column and a spring, adapting to different pipe length requirements.

The utility model provides a system configuration for a coal power unit to adapt to deep peak regulation flexible operation, which is characterized in that a newly-added external steam cooler is arranged at an existing final-stage high-pressure water supply outlet of a water supply pipeline, and a steam side inlet of the newly-added external steam cooler is connected with a pressurization module; steam lower than the target steam extraction pressure grade is introduced into an inlet of the pressurization module, and a steam side outlet of the newly-added external steam cooler communicates with a steam inlet of an existing final-stage high-pressure heater; the steam lower than the target steam extraction pressure grade is pressurized by the pressurization module, firstly enters the newly-added external steam cooler to heat the feed water, and then enters the existing final-stage high-pressure heater to heat the feed water, so that the temperature of the feed water entering the furnace of the unit is increased; and meanwhile, a certain feed water pressure is maintained, so that feed water at an outlet of the economizer is kept at a certain supercooling degree, dry-state operation of the boiler is maintained under the deep peak regulation working condition, the hydrodynamic stability is maintained, and the denitration system is continuously and stably put into operation.

The utility model relates to the technical field of pneumatic ash conveying, and provides a pneumatic ash conveying pipeline structure for a coal economizer, which comprises a machine body, an ash conveying pipeline is fixedly connected to the side face of the machine body, a feeding pipe is fixedly connected to the top of the machine body, and a device body is fixedly connected to the top of the feeding pipe. A large motor is fixedly connected to the inner wall of the ash conveying pipeline, fan blades are fixedly connected to the tail end of an output shaft of the large motor, and a material distributing mechanism is arranged on the side face of the feeding pipe. Through mutual cooperation of internal components of the material distribution mechanism, accurate quantitative material distribution is achieved, the size of a driving drive plate is matched with the size of a driven groove wheel to ensure stable intermittent movement, a plurality of material distribution plates in a circumferential array form an independent material cavity, the material flow is controlled, and orderly material conveying is ensured through cooperation of rotation of the material distribution plates. And meanwhile, the sealing performance and the structural stability are enhanced through the symmetrical bolt design of the box cover, modular clamping groove connection is convenient to maintain, and the reliability and the material distribution efficiency of the coal economizer pneumatic ash conveying system are effectively improved.

The application discloses a method for eliminating the vibration of a dry quenching auxiliary economizer, and relates to the technical field of dry quenching outside a furnace, which comprises the following steps: after discovering abnormal vibration of the auxiliary economizer, a handheld vibration detector is used to monitor the tube box of the auxiliary economizer; when the vibration speed of a local point of the tube box shell is not less than 6.5 mm / s, it is judged that the vibration source is the tube box shell, the heat preservation layer of the tube box is removed, the shell is reinforced by using a profile steel, and the abnormal vibration is eliminated; when the vibration speed of multiple points around the tube box shell is not less than 6.5 mm / s, it is judged that the vibration source is the tube box inner row pipe, the machine is stopped, the row pipe attachments are washed by high-pressure water, if the abnormal vibration is not eliminated, a flow guide device is installed on the row pipe, and the abnormal vibration is eliminated. Through the method, the cause of the abnormal vibration of the auxiliary economizer during operation can be quickly judged, the fault can be treated in time, the water leakage accident caused by the severe abrasion of the internal row pipe due to the long-time abnormal vibration can be prevented, and the method has the beneficial effects of saving cost and reducing the maintenance time.

The invention discloses a carbon black tail gas boiler gravity self-deashing environment-friendly structure which comprises a low-temperature plate type economizer, a communicating flue and an air preheater, the communicating flue is in an inverted-U shape, the low-temperature plate type economizer and the air preheater are communicated through the inverted-U-shaped communicating flue to form a relatively independent space, and the low-temperature plate type economizer is of a plate type light pipe structure. The plate-type light pipe structure comprises a plurality of groups of heat exchange units, each heat exchange unit is a pipe panel formed by a plurality of rows of coiled pipes connected in parallel, the pipe panels are arranged in sequence, the pipe panels adopt a large-pitch design, and the pitch between the pipe panels is 100mm; the problem that the tail heating surface of the carbon black tail gas boiler is prone to dust accumulation and blockage is solved, the corrosion condition of the tail heating surface is improved, the service life of a low-temperature economizer and an air preheater is prolonged, the heat transfer efficiency of the heating surface is guaranteed, fan energy consumption is reduced, the stable operation period of the boiler is prolonged, and the blowing-out overhaul and dust removal frequency is reduced. Not only can cost reduction and benefit increase be realized, but also energy conservation and environmental protection are realized.

The invention discloses a boiler system capable of discharging low-concentration CO and NOX. The system comprises a hearth, a first-stage economizer, a catalyst reactor, a second-stage economizer, an air preheater, a dust remover and an induced draft fan. The hearth, the first-stage economizer, the second-stage economizer, the air preheater, the dust remover and the induced draft fan are connected in sequence; the number of the catalyst reactors is at least one, and the catalyst reactors are arranged in at least one of the following positions: a position between the primary economizer and the secondary economizer, a position between the secondary economizer and the air preheater, a position between the air preheater and the dust remover, a position between the dust remover and the induced draft fan and an outlet pipeline of the induced draft fan; the catalyst reactor is filled with a multifunctional catalyst, NOX in the boiler flue gas can be reduced into N2, and CO in the boiler flue gas can be oxidized into CO2 at the same time. According to the device and the method, NOX and CO in the boiler flue gas can be efficiently and synergistically removed in a limited space, and the device and the method have relatively high environment-friendly value and economic value.

This invention discloses a flue gas purification system and process for high-acid pollutant flue gas from waste incineration, relating to the field of flue gas purification technology for waste incineration. The flue gas purification system includes the following components: a first-stage dry reactor for receiving high-temperature flue gas and performing first-stage deacidification treatment; a first-stage dust removal device; a high-temperature economizer; a second-stage dry reactor for receiving flue gas cooled by the high-temperature economizer and performing low-temperature deacidification treatment and removal of dioxins and heavy metals; a second-stage dust removal device; and a denitrification device for denitrifying the flue gas. The flue gas purification process in this application, when treating flue gas with high concentrations of acidic pollutants, can achieve efficient and synergistic removal of multiple pollutants, ultimately achieving multiple technical effects such as "achieving purification efficiency standards, improving energy utilization, reducing treatment costs, and optimizing power generation efficiency."

This utility model discloses a cold storage refrigeration unit with high-efficiency heat recovery function, belonging to the field of cold storage refrigeration equipment. The unit includes an evaporator, a compressor, a total heat recovery condenser, an insulated hot water storage tank, a liquid storage tank, a subcooling economizer, and a throttling valve. The evaporator outlet is connected to the compressor inlet, and the compressor outlet is connected to the total heat recovery condenser inlet. The total heat recovery condenser outlet is connected to the evaporator inlet sequentially via the liquid storage tank, the subcooling economizer, and the throttling valve, forming a refrigeration cycle loop. The total heat recovery condenser and the insulated hot water storage tank are connected by pipelines to form a water circulation path. The insulated hot water storage tank has a lower cold water inlet and an upper hot water outlet. It can meet the refrigeration needs of cold storage while recovering all usable heat (excluding natural losses) through the total heat recovery condenser to produce hot water, eliminating the need for secondary heat dissipation in conventional condensers. This solves the problems of heat waste or low heat recovery efficiency in conventional equipment, resulting in high heat recovery efficiency and significant energy savings.

According to the energy-saving system of the coal-fired boiler, when the boiler operates at a low load, part of steam generated during operation of the boiler is used for heating secondary air by arranging the secondary air heater, so that combustion of fuel in a hearth is stabilized, meanwhile, the temperature of flue gas at an outlet of the economizer is increased, and energy is saved. The inlet flue gas temperature of the SCR denitration device can meet the requirement of low-load commissioning; meanwhile, the steam pressure reducer and the sludge drying device are arranged, part of steam generated during operation of the boiler is extracted to be subjected to pressure reduction through the steam pressure reducer to be used for drying the sludge, the dried sludge is input into the boiler to be mixed with pulverized coal for combustion, and the coal combustion cost is saved. According to the device, through cooperative use of the equipment, secondary air can be heated when the boiler is in low load, and the combustion stability of the boiler is improved; and sludge can be blended and burnt under high load, so that the fuel cost is reduced.

The invention discloses a supercritical gas-fired boiler based on tower type arrangement and a thermal optimization control method, and relates to the field of supercritical gas-fired boilers, the supercritical gas-fired boiler comprises a hearth, a burner, a water cooling wall, a heating surface in the boiler, a header outside the boiler, an economizer and a tubular air preheater. The periphery of the hearth is wrapped by an ash bucket water-cooled wall, a spiral tube coil water-cooled wall and a vertical tube coil water-cooled wall, in-furnace heating surfaces are sequentially arranged in the smoke flowing direction and are suspended through in-furnace suspension tubes, and an out-furnace collecting box is suspended through out-furnace suspension tubes; the economizer is divided into an upper stage and a lower stage, is arranged by adopting sequential tube bundles and is provided with a bypass, and a denitration reactor is arranged between the upper stage and the lower stage; the suspension pipe is made of high-strength alloy steel, a working medium flows in the suspension pipe, and a heating surface and related parts are made of alloy materials with adaptive performance. The invention has the technical effects of high safety of the wall temperature of the heated surface, small deviation, small occupied area, low smoke, wind, steam and water resistance, smooth expansion system, adaption to the rapid variable load requirement, excellent environmental protection property, reliable operation and the like.

The application provides a denitration inlet flue gas temperature lifting system of a boiling type economizer tube group, which comprises a feedwater main pipeline and a first feedwater branch pipeline; a first economizer tube group and a second economizer tube group are sequentially arranged on the feedwater main pipeline, and a first valve is arranged on the upstream side of the first economizer tube group on the feedwater main pipeline; the upstream end of the first feedwater branch pipeline is connected to the feedwater branch pipeline, and the connection position is located on the upstream side of the first valve; the downstream end of the first feedwater branch pipeline is connected to the feedwater branch pipeline, and the connection position is located between the first economizer tube group and the second economizer tube group; a second regulating valve is arranged on the first feedwater branch pipeline. Under high load conditions, the feedwater absorbs more heat through all the economizer tube groups; under low load conditions, the first economizer tube group is shielded, and the heat absorption amount of the feedwater is reduced. Therefore, the application can shield different economizers, reduce the heat absorption amount of the feedwater in the economizer, increase the flue gas temperature at the economizer outlet, and adjust the denitration inlet flue gas temperature.