23 results about "Soot deposition" patented technology

The invention relates to a high-frequency millimeter-wave radar flue dust deposition online monitoring method and system, and belongs to the technical field of industrial process detection.The monitoring method comprises the steps that a flue three-dimensional structure model is loaded, working parameters of a millimeter-wave radar are configured, and a radar scanning space coordinate system is generated; controlling the millimeter-wave radar to transmit a frequency-modulated continuous wave signal; performing temperature drift compensation on the ash deposition layer reflection signal, and outputting a compensated radar signal intensity matrix; solving a flow field distribution equation in combination with the flue three-dimensional structure model, calculating a flow field turbulence intensity coefficient, and generating a radar signal correction mapping table; calculating the ash deposition thickness of each space coordinate point based on the signal propagation time delay, and outputting an ash deposition thickness distribution map; and extracting a thickness gradient feature vector and a Doppler frequency shift feature in the soot deposition thickness distribution diagram, inputting the thickness gradient feature vector and the Doppler frequency shift feature into a soot deposition state classification model, outputting a soot deposition abnormal region coordinate set, and generating a soot blower control instruction or a maintenance alarm instruction. According to the invention, the ash deposition monitoring precision and stability can be improved.

The utility model discloses a movable dead-corner-free efficient soot blower which comprises an air supply mechanism, a transmission mechanism and a driving mechanism, and the air supply mechanism is L-shaped on the whole and comprises an air blowing pipeline and an air suction mechanism; the transmission mechanism comprises a connecting gear, a movable pulley, a transmission control box and a supporting device. The orientation wheel disc and the movable pulley are arranged at the lower end of the soot blowing device, so that the problems that in the prior art, the soot blowing force of a fixed machine position is obviously attenuated along with the distance, dead angles which cannot be in place exist, local soot deposition is serious and the like are solved, the soot cleaning effect of the boiler device is improved, and the service life is prolonged. And the labor cost for manually cleaning dead angles of the boiler is reduced.

The invention relates to the field of boiler soot blower control, and particularly discloses an intelligent control method for a boiler soot blower, which comprises the following steps of: identifying a stable working condition and monitoring soot deposition characteristic parameters including a dirt coefficient and a flue gas pressure difference growth rate under the stable working condition; comparing the ash deposition characteristic parameters with a cleaning reference to judge whether ash blowing is needed or not; evaluating the soot blowing demand degree and matching soot blowing parameters; based on the variation trend of the ash deposition characteristic parameters, identifying the ash deposition distribution type and setting a corresponding ash blowing working mode; in the soot blowing process, the soot blowing ending time is judged according to the soot deposition characteristic parameter change rate and the blowing duration; and after soot blowing is finished, the soot blowing effect is quantitatively evaluated by comparing the initial value and the recovery value of the soot deposition characteristic parameter. According to the method, accurate control over the soot blowing process is achieved, the problems that in the prior art, the adaptability to load changes is poor, the soot blowing strategy is single, and judgment on the ending time is inaccurate are effectively solved, and the soot blowing efficiency and the boiler operation safety and economical efficiency are remarkably improved.

The utility model provides a pitot tube and a flow velocity detection system, and the pitot tube comprises a total pressure guide tube; a static pressure guide pipe; the sampling nozzle is a C-shaped pipe, and the sampling nozzle comprises sample injection openings in the two ends and a connecting opening located between the two sample injection openings; the far end of the total pressure guide pipe and / or the far end of the static pressure guide pipe are / is connected with the sampling nozzle through the connector. According to the pitot tube provided by the invention, smoke dust is difficult to deposit on the sampling nozzle of the C-shaped tube; the area of the opening facing / backing to the fluid is far smaller than the inner surface area of the sampling nozzle, and even if smoke dust is deposited on the inner surface of the sampling nozzle, the sampling nozzle can be used for flow velocity detection for a longer time; and when smoke dust deposition occurs in long-term use, high-pressure gas can be introduced from one sample introduction opening of the sampling nozzle and flows out from the other sample introduction opening, so that the stroke of the high-pressure gas is smaller, the pressure loss is small, and smoke dust particles are easier to clean.

The invention discloses a novel video monitoring device applied to a chamber combustion type pulverized coal boiler, relates to the technical field of boiler monitoring, and solves the problems that an existing hearth flame television monitoring device is limited in observation range and single in function. The device comprises a guide pipe, a driving structure, a supporting and hanging device, a camera and a lens tube, the guide pipe and the driving structure are obliquely arranged on the furnace wall, and the guide pipe is provided with a self-ash-cleaning hole and a turnover baffle; a lens tube is arranged at the front end of the camera; the camera and the lens tube are connected through the supporting and hanging device and the driving structure, and the lens tube is provided with a cooling air interface; a rotating mechanism is arranged on the supporting and hanging device and drives the camera and the lens tube to rotate. According to the invention, the camera and the lens tube are driven to rotate through the arranged rotating mechanism, so that the monitoring range is enlarged, the ash deposition state of the wall surface of the hearth and the bottom of the suspended tube panel is monitored on line in real time, and then the flame temperature and the ash deposition state of the tube panel are judged by adopting colorimetric temperature measurement analysis software.

A method of manufacturing a hollow core optical fiber including (a) a consolidated tube presenting step including presenting a consolidated cladding tube including a consolidated cladding first end, a consolidated cladding second end, a consolidated cladding longitudinal axis, and a consolidated cladding inner surface, the consolidated cladding inner surface defining a consolidated cladding interior and including consolidated cladding recesses (i) positioned around the consolidated cladding longitudinal axis and (ii) extending from the consolidated first end to the consolidated second end; and (b) a capillary tube coupling step comprising coupling preform capillary tubes to the consolidated cladding inner surface within the consolidated cladding recesses thus creating an optical fiber preform, each of the preform capillary tubes disposed within a different one of the consolidated cladding recesses. The cladding tube may be made by soot deposition, e.g. on a bait rod having a structure corresponding to the recesses, or by extrusion.

The invention relates to the technical field of thermal power generation, in particular to a soot blowing control method, device and equipment and a storage medium. The current soot deposition state of a coal economizer is obtained, and a plurality of sound wave generators are installed on the outer wall of the coal economizer; generating a corresponding target soot blowing strategy according to the current soot deposition state; according to the target soot blowing strategy, operation parameters and an operation time sequence of each sound wave generator are determined; and each sound wave generator is controlled to blow soot to the economizer based on the operation parameters and the operation time sequence, so that different soot blowing strategies are selected according to different soot deposition states, the soot blowing efficiency is improved, the sound wave generators are controlled to carry out vibration removal on blocked sediments in the pipeline, and the blocked state of the pipeline is conveniently controlled.

The invention discloses a boiler design method beneficial to long-term low-load operation of a circulating fluidized bed boiler, and belongs to the technical field of circulating fluidized bed boiler design. According to the method, through coupling thermodynamic calculation and fluid dynamic simulation, all superheater heating surfaces are integrally arranged in a hearth, a hearth outlet flue gas temperature prediction value is determined so as to accurately arrange an SNCR spray gun, and a denitration temperature window is ensured; a self-adaptive exhaust gas temperature regulation and control system is installed, a heating surface expansion space is reserved in a coal economizer area, a hot air recirculation loop and an air heater are integrated, and low-temperature corrosion of an air pre-heater is prevented; and a steam soot blowing strategy associated with the load is designed, and the corresponding soot blower layout is configured, so that the problem of tail soot deposition is solved. The system can accurately ensure that the main steam temperature reaches the standard, guarantee the denitration efficiency, prevent the air pre-heater from being corroded, solve the problem of dust deposition at the tail part, realize flexible adaptation of the heating surface of the economizer, effectively solve a series of problems during long-term low-load operation of the circulating fluidized bed boiler, and realize stable, efficient and environment-friendly operation of the boiler under long-term low load.

The invention discloses an ash deposition online monitoring and accurate ash blowing optimization system suitable for a large thermal power boiler, and mainly relates to the technical field of boiler cleaning and intelligent control. Comprising a data acquisition unit for acquiring operation parameters of each heating surface in real time; the ash deposition state evaluation unit is used for evaluating the ash deposition degree on line based on a heat transfer analysis and data fusion algorithm; the soot blowing strategy optimization unit is used for generating a precise soot blowing strategy by adopting a multi-objective optimization algorithm; and the soot blowing control unit drives the soot blower to execute and feed back the effect. The system has the beneficial effects that real-time and quantitative online monitoring of the soot state of the heating surface of the boiler is achieved, meanwhile, accurate control over the soot blowing time, sequence and strength is achieved, accumulated soot is effectively cleaned, meanwhile, steam consumption and heating surface abrasion are remarkably reduced, and the overall operation efficiency and economical efficiency of the boiler are improved.

The invention discloses a boiler soot blowing method, system, medium and equipment, and relates to the technical field of coal-fired boiler heating surface cleaning. According to the boiler operation state data of the recent historical time period, the soot deposition change condition of the boiler in the subsequent time period is predicted, the optimal soot blowing strategy of each soot blower in the boiler is determined through the trained reinforcement learning model according to the prediction result and the boiler operation state data, traditional trigger type soot blowing control is avoided, and the soot blowing efficiency is improved. Preventive and continuous cleaning measures can be taken before the dust accumulation problem is serious, and the boiler is always kept in an efficient operation interval. Not only can consumption of soot blowing media be obviously reduced, but also unnecessary erosion corrosion to boiler pipelines can be reduced to the maximum extent, and the service life of equipment is prolonged. And meanwhile, the comprehensive influence of different soot blowing operation sequences on future long-term benefits of the system is evaluated based on state conversion of the whole system of the boiler, so that a soot blowing strategy most favorable for the overall efficiency and economical efficiency of a power plant can be found.

The invention relates to the technical field of catalyst soot blowing of a glass kiln denitration system, in particular to a shock wave soot blowing system and method based on differential pressure detection and machine learning. A shock wave generator and a regional differential pressure detection module are arranged in each 2 * 3 gridding region of each layer of catalyst; the regional differential pressure detection module monitors and collects ash deposition thickness data of all regions in real time, the pressure monitoring module monitors gas pressure fluctuation in real time, the model decision module analyzes the data through an embedded machine learning algorithm, a correlation model of the ash deposition thickness, the gas distribution proportion and the ignition time is established, and an optimal ash blowing strategy is dynamically generated. The industrial personal computer sends an accurate control instruction to the ignition cabinet according to a strategy, independent control over the shock wave generator is achieved, accurate soot blowing can be conducted according to the soot deposition condition difference of different areas through the system, local blockage or catalyst damage is avoided, the soot blowing efficiency is improved, and the service life of a catalyst is prolonged.

The utility model relates to a kind of soot deposition prevention flue gas heat exchanger, the flue gas heat exchanger includes shell body, and the heat exchange pipe being set in the shell body, the pipeline of the heat exchange pipe is connected with heat exchange medium supply device intercommunication;The heat exchange pipe is twisted sheet pipe;The twisted sheet pipe includes twisted sheet and base pipe, and the twisted sheet is helical structure.The utility model is by being arranged twisted sheet pipe in the inside of flue gas heat exchanger, and limit twisted sheet in twisted sheet pipe is helical structure, and the twisted sheet of helical structure can enhance the disturbance of tube outer flue gas, form turbulent effect, improve heat exchange efficiency;The twisted sheet of helical structure can also change local flue gas flow direction, dynamic airflow scouring, prevent ash deposition in flue gas to form bridge, increase the service life of flue gas heat exchanger.

The invention relates to the technical field of boilers, and discloses a soot blowing system which is characterized in that a plurality of data acquisition terminals are arranged in different areas of a hearth, and the data acquisition terminals acquire operation state data of the different areas of the hearth in real time; the information comparison module compares the operation state data with a preset threshold value in real time, and key ash deposition areas with ash deposition degrees and ash deposition operation state data exceeding the preset threshold value in different areas of the hearth are obtained; the soot blowers are arranged in different areas of the hearth; and the controller controls and starts the soot blowers corresponding to the key soot deposition areas in real time so as to carry out soot blowing operation on the key soot deposition areas. The data acquisition terminal is arranged to obtain the running state data of different areas of the boiler furnace in real time, and then the information comparison module is combined with the controller to control the soot blower to perform soot blowing operation on key soot deposition areas, so that soot blowing is performed on the boiler furnace in time, the service life of the boiler is prolonged, heating surface metal of the boiler is protected, and the service life of the boiler is prolonged. And the service life of heating surface metal is prolonged.

The invention belongs to the technical field of artificial intelligence and process control crossing, particularly relates to an intelligent perception driven boiler soot blower operation process self-adaptive control method, and aims to solve the problems of high energy consumption and inaccurate soot cleaning caused by the fact that traditional soot blowing control depends on a fixed period or an empirical threshold value. The method comprises the following steps: synchronously acquiring and fusing in-furnace state data through an infrared thermal imaging sensor, a sound wave ash measurement sensor and a pressure fluctuation three-source sensor, and constructing a high-dimensional sensing vector; evaluating the ash deposition index of each region in real time based on a deep convolution-LSTM hybrid network; and in combination with the reinforcement learning model, dynamically generating an optimal soot blowing parameter instruction according to the soot deposition index, the load and the fuel type. The scheme supports partition independent control, the steam consumption is reduced by 18%, the pipe wall abrasion is reduced by 35%, the smoke exhaust temperature is reduced by 12-15 DEG C, the heat efficiency is improved by 1.2%, and the operation economy and safety of the boiler are remarkably enhanced.

Method for the self-diagnosis of a particle sensor (20) for determining a particle content in a gas stream, wherein the particle sensor (20) has on its surface at least two interlocking interdigital electrodes (22, 23) and a heating element (26) separated from the electrodes (22, 23) by an insulating layer, with which the particle sensor (20) can be heated in a regeneration phase and soot loading on the particle sensor (20) can be removed, wherein a semiconducting layer (28) is formed in the insulating layer directly below the electrodes (22, 23) by means of external or self-doping, which consists of aluminium oxide with a sodium ion doping of 100 ppm to 10000 ppm and under which an insulating layer of pure aluminium oxide is introduced, and for self-diagnosis a measuring voltage is applied at least temporarily between the electrodes (22, 23) and a self-diagnostic current (31) is measured,wherein a DC voltage is applied between the electrodes (22, 23) for self-diagnosis as a measuring voltage and the particle sensor (20) is heated to temperatures > 500°C by means of the heating element (26) before being connected to the DC voltage, wherein the heating of the particle sensor (20) to temperatures > 500°C is carried out for at least 30 seconds and wherein the temperatures > 500°C are monitored and controlled by means of a platinum resistor integrated in the particle sensor (20) which has the form of a measuring meander, and wherein the connection of the electrodes (22, 23) to the DC voltage is carried out only for a short time in the range of 1 ms to 100 ms.

The utility model relates to the technical field of power station boiler air bellow bottom ash deposition blowing air systems, and aims to solve the problems that power station boiler air bellow bottom ash deposition affects safe operation of a boiler and the air distribution effect of a burner and the like. According to the technical scheme, two independent blowing air main pipes are led out from a boiler hot primary air system through a hot primary air taking unit, and each main pipe is provided with an electric inserting plate door and a manual turning plate door; the multi-stage branch pipeline unit extends from the main pipe to the left side and the right side of a boiler hearth to form a symmetrical branch pipe system, and a branch pipe comprises a plurality of branch pipes and extends to the front area and the rear area of an air bellow boiler. The air bellow bottom blowing unit comprises a blowing pipeline arranged in the air bellow, the blowing pipeline is fixed above a truss at the bottom of the air bellow and keeps a preset distance with a bottom plate of the air bellow, blowing holes are evenly distributed in the bottom face of the blowing pipeline in the axial direction, and the blowing pipeline sprays air flow towards the bottom plate of the air bellow and is communicated with the branch pipe through a distribution header. The device is mainly used for effectively purging accumulated dust at the bottom of the power station boiler bellows and guaranteeing stable and safe operation of the boiler.

Disclosed in the present invention are an infrared energy-saving cover and a gas appliance, aiming at overcoming the defects in the prior art that the gas appliance has low gas combustion efficiency and heat is easily dissipated. The present invention solves the described technical problems by means of the following technical solutions: the infrared energy-saving cover comprises: an infrared generating cover and a thermal insulation cover arranged outside the infrared generating cover; an air preheating cavity is formed between the thermal insulation cover and the infrared generating cover; the air preheating cavity is provided with an air inlet channel in communication with outside air, and a plurality of air outlets are formed on and pass through the infrared generating cover; and air enters from the air inlet channel, passes through the air preheating cavity, and then flows out from the air outlets. The air flows in from the bottom of the air preheating cavity. When passing through the air preheating cavity, the air is heated, and the heated air is ejected from the air outlets to undergo high-temperature secondary combustion with gas. In a combustion-supporting environment of high-temperature air obtained after heating in the air preheating cavity, a combustible gas can be completely consumed by means of secondary combustion, thereby preventing the formation of harmful gases and soot deposition.

The utility model provides a flue gas flow uniform distribution plate device which comprises a flue which comprises a horizontal section and a vertical section, and is characterized in that a first guide plate, a second guide plate, a third guide plate and a fourth guide plate which are obliquely arranged are sequentially arranged on the upper side of the inner wall of the horizontal section close to the vertical section, the first guide plate is of a rectangular structure, and the second guide plate is of a rectangular structure. And the second flow guide plate, the third flow guide plate and the fourth flow guide plate are of fan-shaped structures. The inclined guide plates are arranged on the upper side of the horizontal section of the flue, flue gas on the upper side of the horizontal section of the flue is guided to the lower side through multiple guide of the guide plates, the flowing speed of the flue gas on the upper side is increased, and smoke dust is effectively prevented from being deposited in the flue, blocking the flue and affecting smoke exhaust; the area of the flow guide plate is gradually increased, so that the normal flow of smoke on the lower side of the horizontal section is effectively prevented from being influenced by excessive flow guide of smoke at one time; the structure is simple and the manufacturing cost is low.

The application discloses a sensing DPF system with soot and ash detection function and a control method thereof. The system comprises a metal packaging shell, a DPF carrier arranged in the metal packaging shell, two or more detection electrodes arranged in the DPF carrier, and a controller. The two or more detection electrodes and the metal packaging shell divide the DPF carrier into multiple electrode areas, and the detection electrodes are connected to the controller. The system and the control method directly detect the soot deposition amount and the soot distribution by detecting the physical characteristics of the soot itself, trigger and stop DPF regeneration, trigger the ash calculation process according to the calculated soot deposition amount and soot distribution, and calculate the ash deposition in the DPF according to the pressure difference between the two ends of the DPF. Since the soot amount is directly detected, the system is basically not affected by the soot distribution, the soot shape, the environmental parameter change, the error between engine parts, and the engine aging.

The invention provides an intelligent boiler soot blowing method and system based on neural network prediction, and belongs to the technical field of boiler operation and maintenance. The problems that an existing soot blowing scheme depends on manual blowing-out inspection, the soot blowing time lags behind, a full-coverage soot blowing mode with fixed frequency or a simple threshold value is low in efficiency, and excessive soot blowing, equipment abrasion and energy consumption and medium waste are easily caused can be at least partially solved. The method comprises the following steps: acquiring a plurality of real-time monitoring parameters representing the ash deposition state of the heating surface of the boiler; inputting the plurality of real-time monitoring parameters and the boiler operation parameters into a preset neural network prediction model; according to the future ash deposition trend parameter; and checking the dynamic control instruction according to a preset security rule so as to execute the dynamic control instruction. Through multi-dimensional data monitoring, neural network dynamic prediction and closed-loop control strategies, on-demand and accurate intelligent soot blowing is achieved, energy is effectively saved, consumption is effectively reduced, equipment is effectively protected, the heat exchange efficiency is improved, and operation safety is guaranteed.

The invention relates to a soot blowing and flue soot deposition control system. The soot blowing system comprises an air cannon storage tank; the control valve assembly is communicated with the air cannon storage tank; the air cap is communicated with the control valve assembly, the air cap is arranged in a flue of the boiler and located at the furnace arch of the flue, a plurality of spraying holes are formed in the circumferential side wall of the air cap at intervals, and the axis of each spraying hole is parallel to the heating surface of the furnace arch. And through the combination of the air cannon storage tank and the air cap, the ash deposition area can be disturbed to the maximum extent in a high-explosion and low-air-volume mode within a short time, and it is avoided that a large amount of air enters the boiler to affect operation of the boiler. Moreover, the axes of the spray holes are controlled to be parallel to the heating surface, so that the steam soot blowing times of the heating surface of the boiler slope section can be reduced, soot blowing media are saved, the heating surface is prevented from being abraded, the requirements of low cost and easy transformation of equipment are met, and the overall operation economical efficiency of a thermal power generating unit is improved.