631results about "Casings/linings" patented technology

The invention relates to the technical field of control and regulation systems, in particular to a hearth auxiliary regulation control system which comprises a data processing module, an analysis module, a control module, a regulation and control module, an optimization module and a safety early warning module. The data processing module collects temperature data of a hearth combustor area, a water cooling wall and a tail flue in real time through a distributed temperature sensor network, and a dynamic combustion field three-dimensional model is generated through Kalman filtering denoising, redundancy cross validation and a temperature compensation algorithm in combination with combustor flame position signals and an air door opening state. And the optimization module updates the strategy weight based on the combustion efficiency improvement rate, and reinforces learning to extend the adaptive boundary of the strategy library. And the safety early warning module calculates the matching coefficient of the pipe wall temperature and the allowable stress in real time, triggers a grading intervention strategy to reduce the overtemperature risk, forms full-process closed-loop control, and improves the thermal efficiency and the operation safety of the boiler.

The invention relates to the technical field of mechanical stress and thermal deformation monitoring, in particular to a combustion fine adjustment method based on full-hearth expansion monitoring, which is characterized in that expansion sensor arrays are arranged on each layer of a main burner area of a boiler hearth, and vibration monitoring units are arranged in a layered manner from a main burner to an SOFA air area synchronously; normal deformation, three-dimensional expansion displacement data and vibration spectrum data of the four furnace walls are collected; generating a standardized monitoring data set through wavelet noise reduction and temperature compensation processing, fusing boiler operation parameters, and inputting the boiler operation parameters into the reinforcement learning model to generate a combustor adjustment instruction; water-cooled wall expansion rate change data is collected in real time to optimize model weight and update a control strategy, and a closed-loop feedback mechanism is formed. According to the method, through multi-source sensing data fusion and dynamic modeling, sub-meter analysis of thermal load distribution and quick response of the combustion state are achieved, the boiler operation efficiency is improved, and the service life of equipment is prolonged.

The invention provides a water-cooled wall safety monitoring method and a combustion adjustment control method based on distributed optical fiber sensing, and the method specifically comprises the following steps: arranging a Bragg grating on a water-cooled wall, and obtaining the Bragg wavelength offset; predicting a temperature value and a strain value at the current moment according to historical temperature and strain data by using a state equation of stress and temperature; the Bragg wavelength prediction offset is obtained by combining the temperature value and the strain value at the current moment with the sensor error; obtaining a wavelength change residual error according to the Bragg wavelength offset and the Bragg wavelength prediction offset, and correcting the temperature value and the strain value at the current moment by using the wavelength change residual error to obtain a real temperature value and a real strain value at the current moment; a real strain value at the current moment is converted into a stress value, a water-cooled wall tearing factor is established by utilizing the stress value, the number of thermal cycles and the fatigue life of a water-cooled wall material, water-cooled wall safety monitoring and combustion adjustment control are realized by utilizing the water-cooled wall tearing factor, and the operation safety of the boiler is improved.

The present disclosure is directed to a firebox basket for a barbeque grill or smoker. In one form, the present disclosure provides a grill comprising an ash depository, a firebox basket positioned in the grill above the ash depository; and a cooking rack positioned above the firebox basket. The firebox basket comprises: a support basket defining an internal area, the support basket comprising: a plurality of concentrically stacked rungs that define a side wall of the firebox basket; and a grate positioned at a bottom of the plurality of concentrically stacked rungs; and a plurality of ceramic pieces disposed within the support basket. The support basket is configured to support the plurality of ceramic pieces around the internal area of the support basket.

The invention discloses a thermal power generating unit boiler wall temperature early warning method and device, and the method comprises the steps: determining a steady-state working condition according to boiler operation parameters; the boiler operation parameters comprise coal feeding quantity, water feeding quantity, primary air quantity and secondary air quantity; calculating the wall temperature change rate of each monitoring point in a preset time window; the time window is set according to a data smooth filtering requirement and an early warning response timeliness requirement, and the monitoring points comprise a superheater, a reheater and a water cooling wall; and if the wall temperature change rate of at least one monitoring point is greater than or equal to a preset early warning threshold value and the duration is greater than or equal to a corresponding time threshold value, executing a corresponding early warning strategy. Whether the boiler is in the steady-state operation state or not is recognized before early warning is triggered, so that wall temperature fluctuation interference in the normal dynamic process such as unit load adjustment and combustion working condition fine adjustment is eliminated, it is avoided that the normal working condition is misjudged to be abnormal, the early warning timeliness of the wall temperature of the boiler is improved, meanwhile, the misjudgment rate is reduced, and the early warning accuracy is improved.

The invention discloses a strong premixing combustion chamber for restraining combustion noise based on a Helmholtz resonant cavity, and relates to the technical field of energy and power. Air and fuel enter the mixing cavity through corresponding connectors to be strongly premixed, premixed gas enters the hearth to be combusted through slit channels among water cooling channel branch pipes, a water cooling channel array can prevent backfire, the Helmholtz resonant cavity is connected with the hearth through a cavity neck and is provided with an air film cooling channel, the size of the Helmholtz resonant cavity needs to measure combustion noise, and a frequency spectrum is analyzed to obtain characteristic frequency. The neck length, the cross section area and the resonant cavity volume are calculated according to a Helmholtz resonance formula, and the sound absorption effect is verified in combination with a low-order thermoacoustic model. Combustion efficiency is improved through the strong premixing and slit water cooling design, tempering is prevented, NOx is reduced, the diffusion combustion problem is solved, the targeted design resonant cavity is matched with air film cooling, the defects that an existing silencing structure is large in size, poor in adaptation and low in high-temperature reliability are overcome, complex active control is not needed, cost is low, applicability is high, and the application range is wide. And cooperative control of high efficiency, low emission and unstable combustion is realized.

A combustor of a gas turbine according to one aspect of the present disclosure includes: an outside wall surrounding a combustion chamber; a liner located inside the outside wall and facing the combustion chamber; a spacer at least part of which is located between the outside wall and the liner; a fastener at least part of which is located outside the outside wall; and a fixture by which the liner is attached to the outside wall and which includes a head supporting the liner and a shaft portion penetrating the outside wall and fastened to the fastener. The fastener includes a fastener groove extending along the fixture, a first air passage being located at the fastener groove. The spacer includes a spacer groove extending along the fixture, a second air passage through which air having flowed through the first air passage flows being located at the spacer groove.

The invention relates to a system for improving the mass flow rate of an upper hearth, and aims to solve the problems of water-cooled wall header pipe joint tension fracture, water-cooled wall fin tension fracture and over-temperature pipe explosion of different degrees during deep peak regulation and rapid load change of an existing boiler in-service unit, in particular to a system for improving the mass flow rate of an upper hearth, in order to solve the problems of water-cooled wall header pipe joint tension fracture, water-cooled wall fin tension fracture and pipe over-temperature pipe explosion of the existing boiler in-service unit. A water supply pipeline is communicated with a coal economizer coiled pipe heating surface, the coal economizer coiled pipe heating surface is communicated with a water cooling wall inlet header, the water cooling wall inlet header is communicated with a water cooling wall middle header, and the outlet end of the water cooling wall middle header is communicated with the inlet end of a water cooling wall upper header through an upper hearth vertical water cooling wall. The outlet end of the water-cooled wall upper header is communicated with the inlet end of the steam-water separator, the outlet end of the steam-water separator is communicated with the inlet end of the water storage tank, the outlet end of the water storage tank is communicated with the inlet end of the boiler water starting circulating pump, and the outlet end of the boiler water starting circulating pump is communicated with the inlet end of the water-cooled wall middle header through a circulating pump outlet pipeline and a second recirculation pipe. The invention is applied to the field of boilers.

Disclosed is a hydro furnace (100, 200) comprising: combustion chamber (102, 202) comprising first flue gas outlet (110, 212) and second flue gas outlet (112, 214); inner flue gas pipe (104, 204) having first end (114, 222) and second end (116, 224), first end being connected to first flue gas outlet, inner flue gas pipe further comprising multiple pipes (118a, 118b, 118c, 118d, 118e, 118f, 226), each of multiple pipes comprising third end (120, 228) and fourth end (122, 230), and being arranged to cross through inner flue gas pipe; liquid jacket (106, 234) surrounding at least partially combustion chamber and inner flue gas pipe, liquid jacket comprising liquid inlet (124, 220) and liquid outlet (126, 240), wherein third and fourth ends of multiple pipes are connected to liquid jacket; and bypass flue gas pipe (108) having fifth end (128) connected to second flue gas outlet and sixth end (130).

The utility model discloses a circulating fluidized bed boiler suitable for high-alkali and high-chlorine coal. The circulating fluidized bed boiler comprises a hearth, a cyclone separator, a steam cooling flue and a tail flue which are connected in sequence, a water cooling screen is arranged in the hearth; the lower end of the cyclone separator is connected with a material returning device, the material returning device is connected with the lower part of the hearth through a first-stage material returning pipe and connected with an external bed through a connecting pipe, a high-temperature superheater is arranged in the external bed, and the external bed is connected with the lower part of the hearth through a second-stage material returning pipe; the steam cooling flue is divided into a steam cooling down flue and a steam cooling up flue through a longitudinal partition wall connected with the top of the steam cooling flue, and a water cooling tube bundle is arranged in the steam cooling up flue; according to the utility model, contamination and corrosion of high-alkali and high-chlorine coal for combustion to a heating surface can be prevented, damage to equipment in the boiler is avoided, and long-period stable operation of the boiler is realized.

Refractory anchoring devices include a main body and a mounting feature for mounting to a thermal vessel. The main body has the shape of two end-to-end Y's forming a central segment, branch segments extending from ends of the central segment, and extension segments extending from the branch segments, to collectively form four unenclosed cell openings that are semi-hexagonally shaped. Some embodiments include reinforcement segments extending into respective cell openings, voids extending through respective adjacent branch and extension segments, an underbody gap under the central segment, a single stud-welding stud for the mounting feature, and / or a collar-and-stud connection between the anchor main body and a stud-welding stud of the mounting feature. Refractory anchoring systems and methods include an array of the refractory anchoring devices arranged and mounted so that the unenclosed semi-hexagonal cell openings of adjacent anchoring devices cooperatively form substantially hexagonal cells.

The invention discloses a near-wall air device for preventing high-temperature corrosion of a front and back wall hedging pulverized coal boiler, and relates to the technical field of application of near-wall air of pulverized coal boilers. The close-to-wall air device for preventing the high-temperature corrosion of the front and rear wall hedging pulverized coal fired boiler comprises a close-to-wall air nozzle arranged on the side wall of a hearth, the hearth comprises a furnace wall, the side wall of the hearth is provided with a plurality of wall-type arranged over fire air nozzles and wall-type arranged burner nozzles, and the close-to-wall air nozzle is arranged on the side wall of the furnace wall in a penetrating mode. By means of the wall-attached air nozzles, in the using process, according to the requirement for preventing high-temperature corrosion of the boiler in the reducing atmosphere, multiple layers of wall-attached air can be arranged on the wall face of the side wall of the hearth, each layer of wall-attached air comprises the multiple wall-attached air nozzles, and the area, prone to high-temperature corrosion, of the wall face of the boiler can be completely covered; the oxidizing atmosphere of the near-wall area is formed, the risk of high-temperature corrosion of the water cooling wall is effectively avoided, and meanwhile the air volume corresponding to each piece of near-wall air can be adjusted according to actual needs.

The invention relates to a straw combustion boiler and a straw combustion heating system. The boiler comprises a combustion chamber and an ash pool, a water fire grate is fixedly arranged between the combustion chamber and the ash pool, a first double-layer plate water-cooled wall is arranged on the outer side of the combustion chamber and on a boiler arch, one end of the water fire grate is communicated with a water return port of the boiler, the other end of the water fire grate is communicated with the first double-layer plate water-cooled wall, a primary air supply pipe is arranged below the water fire grate, and a secondary air supply pipe is arranged on the side wall of the combustion chamber. The heating system comprises a boiler, a water tank, a water supply drum and a water return drum, the water tank is connected with a water inlet of the boiler through a water pipe, a smoke outlet of the boiler is connected with the water supply drum, the water supply drum is connected with a smoke inlet of the water return drum, and the water return drum is connected with a chimney; a water outlet of the boiler is connected with a water inlet of the water supply boiler barrel, a water outlet of the water supply boiler barrel supplies water to users, user return water is connected with the water return boiler barrel through a water return pipe, and the water return boiler barrel is connected with the boiler. The straw combustion efficiency is high, coal can be replaced, and the condition of the same room temperature is achieved.

The invention relates to the technical field of thermal power plant boiler walls, and discloses a thermal insulation and heat preservation sealing structure for a thermal power plant boiler wall. The heat insulation and preservation mechanism is located in the heat preservation inner shell; and the sealing connection mechanism is located between the two heat preservation inner shells. According to the heat-insulation and heat-preservation sealing structure for the boiler wall of the thermal power plant, concrete is injected into the concrete outer shell so that the heat-preservation inner shell can be conveniently poured and fixed to the ground, the connecting supporting plates can conveniently and movably fix the connecting steel bars into the concrete outer shell through the rotating clamping holes, and the concrete is injected into the two sides of the interior of the concrete outer shell; a synchronous plate is manually driven to linearly move, the synchronous plate is connected with a connecting shaft through a rotating hole, the connecting plate is conveniently controlled to shake left and right, then a connecting steel bar is driven to rotate, the connecting steel bar drives a uniform stirring rod to uniformly stir and defoam concrete, concrete solidification is facilitated, and the connecting steel bar is convenient for improving the connecting strength of the concrete; and the thermal insulation inner shell can be conveniently fixed outside the boiler wall of the thermal power plant.

The utility model discloses an ash gasification boiler empty flue which comprises a vertically-arranged empty flue body, a water-cooling enclosure wall is arranged in the empty flue body, an input port used for inputting flue gas is formed in the upper end of the empty flue body, the axial direction of the input port is perpendicular to the axis direction of the empty flue body, and an output port used for outputting the flue gas is formed in the lower end of the empty flue body. The output port communicates with the superheater; the water-cooled enclosure wall comprises water-cooled walls arranged on the front side, the rear side, the left side and the right side of the empty flue; and the input end and the output end of the water cooling wall are respectively communicated with a lower collecting box for supplying water and an upper collecting box for discharging a steam-water mixture. According to the utility model, after the flue gas vertically enters the empty flue from the input port, the flue gas can transfer heat with the water-cooling enclosure wall in the empty flue for many times, so that the flue gas can be efficiently cooled, and the flue gas is output from the output port after being cooled and acts with the heating surface of the superheater, thereby reducing the corrosion of the flue gas to the tube bundle of the superheater.

A regenerative thermal oxidizer (RTOx) can destroy fluorinated compounds in a feed gas. The RTOx includes a combustion chamber, a burner, and a heat recovery packing bed. The burner is coupled to the combustion chamber. The burner is configured to receive the feed gas, a fuel gas, and an oxidizing gas. The fuel gas includes methane. The oxidizing gas includes oxygen. The burner is configured to combust the feed gas and the fuel gas in the presence of the oxidizing gas to produce heat an exhaust gas that includes a fluoride-containing byproduct. The heat recovery packing bed is disposed within the combustion chamber. The heat recovery packing bed is made of a ceramic material that includes aluminum oxide that is configured to absorb at least a portion of the heat produced by the combustion of the feed gas and the fuel gas.

This utility model belongs to the field of heat exchange equipment, and particularly relates to a high-temperature resistant water-cooled wall structure, including a heat insulation layer, a pump body, a channel pipe, and a water-cooled pipe. The pump body is installed on the lower side of the heat insulation layer, with its inlet end extending forward. The channel pipe is fixed to the outlet end of the pump body extending downward. The water-cooled pipe is installed inside the heat insulation layer, and the channel pipe is connected to the cross-shaped pipe at the bottom of the water-cooled pipe to form a flow path for the cooling medium. By setting an electric push rod and a cleaning brush, ash and particulate impurities adhering to the outer wall of the water-cooled pipe can be automatically removed, avoiding a decrease in heat exchange efficiency due to ash accumulation, ensuring that high-temperature gas can fully contact the surface of the water-cooled pipe, significantly improving the heat exchange effect, and extending the service life of the equipment.

The application discloses a kind of ammonia coal mixed combustion test system and its multi-working condition operation method.Belongs to fuel clean combustion technical field, including the experimental furnace body with main combustion zone, reduction zone and burn-out zone, and adjustable center ammonia pipe coaxially arranged in the center of burner;The center ammonia pipe is provided with axial telescopic adjusting mechanism and detachable spray head, and the position of nozzle can be continuously adjusted from main combustion zone to reduction zone.System is equipped with coal gasification chamber and multi-fuel feeding unit, and can independently supply pulverized coal, volatile matter, coal coke and ammonia respectively.The application realizes the staged and zoned reaction simulation of pulverized coal, volatile matter, coal coke and ammonia by decoupling the pyrolysis and combustion process of coal, can carry out three experimental modes of coal and ammonia mixed combustion, volatile matter and ammonia homogeneous phase reaction, coal coke and ammonia heterogeneous phase reaction, and has multiple operation control functions.Provides a compact structure, strong working condition adaptability test platform for in-depth study of ammonia coal mixed combustion mechanism and optimization of low-nitrogen combustion process.

The utility model discloses a water-cooled wall wear-resistant grate boiler which comprises a boiler body, a water-cooled wall body is installed in an inner cavity of the boiler body, a fixing ring is fixedly installed at the position, close to the center, of the outer side of the water-cooled wall body in a sleeved mode, and the outer wall of the fixing ring and the inner wall of the boiler body are fixedly installed. Fixing sleeves are fixedly mounted at the positions, close to the top and the bottom, of the outer side of the water cooling wall body in a sleeving mode, a wear-resisting shell and a wear-resisting sleeve are arranged and fixed in the water cooling wall body, wear-resisting and wear-resisting treatment of the interior of the water cooling wall is achieved, and the service life of the water cooling wall is prolonged; through the arrangement of heat conduction blocks, heat dissipation rods and heat dissipation fins, when high temperature is generated on the inner wall of the furnace body, the high temperature is conducted out by the heat conduction blocks, then heat is transmitted to the heat dissipation rods and the heat dissipation fins, the overall component acts on multiple positions, and the situation that the heat intensively acts on the water cooling wall body, consequently, the water cooling wall body is seriously corroded, and the service life is shortened is avoided; and the service life of the whole furnace body is further shortened.

This system for pyrolysis of waste comprises: a pyrolysis device into which waste is fed and which pyrolyzes the fed waste to produce combustible gas; an emulsification device that is connected to the pyrolysis device, and cools condensable gas in the combustible gas produced by the pyrolysis device to produce pyrolysis oil and discharges non-condensable gas; and a combustion furnace which is connected to the emulsification device and which receives and combusts the non-condensable gas discharged from the emulsification device, wherein the pyrolysis device pyrolyzes by heating the waste with hot air provided from the combustion furnace.

Unburned ammonia is reduced using ammonia as a fuel. A burner (10) is provided with a burner (11) that injects a fuel containing ammonia into a combustion space (S), and a refractory material (12) that defines at least a part of the combustion space (S), blocks the passage of combustion gas, and contains a catalyst (C) that decomposes ammonia into hydrogen and nitrogen on a surface (1b) that defines at least a part of the combustion space (S).

The invention relates to the field of oil field steam injection boiler equipment, in particular to a high-capacity subcritical coal-fired CFB type oil field steam injection boiler, the highest pressure of the boiler can reach subcritical pressure, the boiler comprises a steel frame, and a boiler barrel, a hearth water cooling wall and a flue are arranged on the steel frame. A superheater, an upper-level economizer, SCR equipment, a lower-level economizer and an air preheater are sequentially arranged on the flue, a softened water pipeline used for conveying oilfield sewage is arranged on the steel frame, the softened water pipeline is sequentially communicated with the lower-level economizer, the upper-level economizer and a bottom coil pipe of a hearth water cooling wall, and the middle and a top coil pipe of the hearth water cooling wall are communicated with a boiler barrel. A separating assembly used for separating saline water and steam is arranged in the boiler barrel, a steam pipeline is communicated between the top of the boiler barrel and the superheater, the bottom of the boiler barrel is communicated with a salt discharging pipe, and a pressure measuring piece used for monitoring pressure changes in a coil pipe is arranged on the coil pipe of the hearth water cooling wall. The method has the effect of reducing the equipment investment cost.

The utility model discloses a circulating fluidized bed boiler water cooling wall metal module expansion heat exchange anti-abrasion energy-saving device which aims at solving the technical problems that an existing circulating fluidized bed boiler is high in energy consumption, complex in adjustment and not easy to control. The high-temperature-resistant module comprises a plurality of high-temperature-resistant modules which are connected end to end, each high-temperature-resistant module comprises M rows of transverse metal plates and N columns of longitudinal metal plates, each row of transverse metal plates comprises a plurality of transverse metal plate assemblies which are connected end to end, and each column of longitudinal metal plates comprises a plurality of longitudinal metal plate assemblies which are connected end to end; the metal plate assembly comprises a clamping groove and a clamping plate, and a clamping piece used for fixing the clamping plate is arranged on the clamping groove. The energy-saving and efficiency-increasing furnace has the advantages of being convenient to install and capable of adjusting the temperature in the furnace and achieving the purposes of saving energy and increasing efficiency.

The utility model provides an integrated membrane wall boiler two-return-stroke smoke cooling structure which is characterized in that air inlets are formed in preset positions of four walls of a two-return stroke, and branch pipes of a backflow smoke air pipe are inserted into the air inlets; a sealing box is arranged at the air inlet. The flue gas temperature in the cavity of the two-return-stroke hearth can be effectively reduced, existence of solid particle molten soft cores in the flue gas is greatly reduced, attachment of ascending pipes of the two-return-stroke and three-return-stroke connecting sections can be reduced, the blockage phenomenon caused by dust accumulation is reduced, and the operation time of the boiler is prolonged.

The present application provides a wear-resistant prefabricated part, a drop wall, and a drop wall repair construction method, wherein the wear-resistant prefabricated part includes: a prefabricated part body, the prefabricated part body is cast from a refractory castable, the prefabricated part body has a protrusion and a recess, the protrusion is used to cooperate with the recess of another wear-resistant prefabricated part, so that at least two wear-resistant prefabricated parts form an integral structure. The wear-resistant prefabricated part, drop wall, and drop wall repair construction method provided by the present application improve the integrity and wear resistance of the incinerator drop wall, can effectively extend the service life of the drop wall, and ensure the stability of the incinerator operation.

The application discloses a supercritical boiler furnace water wall safety monitoring method, system, equipment, medium and product, relates to the field of data processing and analysis, and comprises the following steps: acquiring monitoring data of electronic expansion indicators and heat flow meters at multiple different positions of a furnace water wall in real time; the monitoring data comprises expansion indication, displacement and heat flow data; stress analysis is performed on the monitoring data based on a stress data analysis system to determine a stress analysis result; and the stress condition of the furnace water wall is monitored according to the stress analysis result and a preset threshold range corresponding to the stress borne by the monitoring point of the furnace water wall, and it is judged whether early warning is needed, so that the stress condition can be effectively reflected, and the failure of the furnace water wall can be effectively reduced.

A boiler tube panel whole row device is characterized in that a boiler tube panel pipeline is located in a severe environment of high temperature and high pressure in a boiler and blown to be damaged by flue gas, tube panels are blown to be damaged by high-temperature flue gas, so that the pipeline is thinned, and adjacent tube panels are collided and rubbed due to the fact that the boiler tube panel pipeline is not located on the same horizontal line and the tube panels swing back and forth in the boiler for a long time. The device comprises boiler tube panel pipelines (9), a tube panel connecting block is welded between every two adjacent pipelines of the boiler tube panel pipelines, a steel tank fixing plate A (1) is movably installed above the boiler tube panel pipelines and the tube panel connecting blocks, and a steel tank fixing plate B (2) is movably installed below the boiler tube panel pipelines and the tube panel connecting blocks. Adjusting holes A (5) and adjusting holes B (6) are formed in the steel tank fixing plate A and the steel tank fixing plate B, and the steel tank fixing plate A and the steel tank fixing plate B penetrate into the adjusting holes through fixing screws (3) and locking nuts (4) to be fixed. The device is used for arranging the boiler tube screens.

This invention provides a small-scale incinerator for the disposal of dead trees and branches, and for the suppression of fire and pest infestations. [Solution] A small wood incinerator having a cylindrical side wall with an air intake 10 at the bottom, configured such that air flowing in from the air intake rises along the side of the side wall to air-cool the furnace wall, and further having a stone plate 3 as a heat-resistant plate, the air diffracts inward at the top of the small wood incinerator to supply oxygen to the top of the stone plate, and the incineration radiant heat is reflected by the side wall, so that a high-temperature furnace core is formed on the top of the stone plate, thereby creating a structure that promotes rapid short-term heat convection.

A cylindrical body includes a plurality of annular members. The annular member each have an outer circumferential wall section, an inner circumferential wall section which is disposed further inward than the outer circumferential wall section and defines a cooling flow path between the inner circumferential wall section and the outer circumferential wall section, and a plurality of cooling fins which are disposed in the cooling path and connect the other circumferential wall section and the inner circumferential wall section; the outer circumferential wall section has a plurality of inlet holes which cause compressed air to be introduced from an intra-case flow path to the cooling path; the inner circumferential wall section has a plurality of outlet holes which cause compressed air to be discharged from the cooling path to a combustion chamber; and the plurality of annular members are connected to each other along an axis X.

The invention relates to the technical field of hearth coking monitoring, and discloses a monitoring method and device for judging a hearth coking state, equipment and a storage medium, and the monitoring method for judging the hearth coking state comprises the following steps: in a boiler operation combustion state, obtaining basic data of six heating surfaces; calculating operation heat transfer coefficients of the six heating surfaces; initial data of the boiler in a healthy state are collected, and an optimal heat transfer coefficient prediction model is trained; boiler operation parameters in the boiler operation combustion state are obtained, and the optimal heat transfer coefficient in the boiler operation combustion state is obtained; and comparing the operation heat transfer coefficient with the optimal heat transfer coefficient to determine whether the hearth of the boiler is coked or not. According to the method, the whole boiler is divided into six heating surfaces, whether adjustment or optimization such as coking or soot blowing needs to be carried out or not is judged through the optimal heat transfer coefficient prediction model according to the six coking surface heat transfer coefficients, boiler shutdown is not needed, the coking condition of the boiler is found in time, power generation losses are reduced, and the operation health state and the operation efficiency of a combustion hearth are improved.