105results about How to "Raise the exhaust gas temperature" patented technology

The invention provides a plate type air preheater with glasses as heat exchange plates, belonging to the technical field of heat exchangers. The plate type air preheater comprises an air preheater frame, the air preheater frame comprises an upper cover plate (10), a lower bottom plate (11) and a stand column (5) and is internally provided with a plurality of heat exchange plates (1) which are correspondingly placed in vertical direction; a sealing strip (4) is arranged between every two heat exchange plates (1) which are adjacent in vertical direction; the sealing strips (4) are mutually staggered at 90 degrees and form a plurality of sealing fluid channels which are adjacent and mutually staggered at 90 degrees by being placed in a staggered way so as to respectively form hot fluid channels and cold fluid channels; rectangular glass plates are adopted as the heat exchange plates (1), and the glass can be silicon-boron glass and boron-free low-alkali glass or quartz glass; and supporting strips (2) which are rectangular or S-shaped nonmetal plate bars are arranged among the fluid channels formed by the upper and lower heat exchange plates (1). The invention has dew point corrosion resistance, efficiently recovers the low-temperature exhaust heat of smoke and can reduce the temperature of discharged smoke and enhance the efficiency of a heating furnace.

The invention relates to a thermodynamic system for improving heat supply unit electric output adjusting capacity. The thermodynamic system is characterized in that main steam or reheating section steam is subject to temperature and pressure reduction to directly serve as heat source steam for industrial heat users; an absorption heat pump 23 of a first-stage heat exchange device serves as a heatsource of a first-stage heat exchange station 25 in the heating period to supply heat to heat users 29 and supplies cold to the users in the non-heat supply period; a high-pressure electric boiler 24of a second-stage heat exchange device improves the boiler water feeding temperature, reduces heat absorbed by boiler fed water in an economizer 4, accordingly improves the boiler tail smoke discharging temperature, and guarantees normal running of an SCR denitration device 5; and according to a three-stage heat exchange device, exhaust steam of a turbine intermediate pressure cylinder 8 serves asheat source steam of a third-stage heat exchange station 27, the unit heat load is guaranteed, and the heat using requirement of the heat users 29 is met. The electric output adjusting capacity of the heat supply unit can be improved, it is guaranteed that the unit heat supply capacity is not decreased under the low load running working conditions, pyroelectric decoupling is achieved, and the electric output adjusting capacity of the heat supply unit is improved.

The invention discloses a power station machine furnace integrated cold end comprehensive optimization system which belongs to the field of power station energy saving. The system mainly comprises a steam turbine, a main economizer, a main flue, a bypass flue, a convergence flue, a main air pre-heater, smoke-water heat exchangers, a high pressure heater, a low pressure heater, a deaerator, a smoke-air heater and steam extraction condensed air pre-heaters. Multi-stages of the steam extraction condensed air pre-heaters are serially arranged, sequentially extract a part of exhaust steam of the steam turbine and corresponding low-pressure-stage extraction steam and preheat cold air stage by stage; and the first, second and third stage smoke-water heat exchangers are used for heating feeding water and condensed water, and high-pressure extraction steam of the steam turbine is replaced. According to the machine furnace integrated cold end comprehensive optimization system, by means of efficient waste-heat utilization, low-pressure extraction steam is used for heating air, and the high-pressure extraction steam for backheating is saved so that unit output power is obviously increased, deep energy saving and consumption reduction of the coal-fired power generation unit are achieved, the problem of low-temperature corrosion on a heated surface during waste-heat utilization is solved, and economical benefits are remarkable.

The invention relates to an optimization system and method for sootblowing of a circulating fluidized bed boiler. A heat-delivery surface pollution factor monitoring module is used for establishing a predictive model of pollution factors of an overheater or a reheater, pollution factors of an economizer, pollution factors of an air preheater, exhaust gas temperature and boiler efficiency by an epsilon-fuzzy tree method through process data which is read by a data communication module from a DCS; then a heat-delivery surface pollution factor optimizing module uses the exhaust gas temperature and the boiler efficiency as guiding and adopts an improved drosophila optimization algorithm for optimizing a predictive value in the heat-delivery surface pollution factor monitoring module so that an optimal set value with adjustable variables is obtained, and the optimal adjustable variable value is transmitted to the DCS through the data communication module so that the operation of site equipment is guided; a heat-delivery surface sootblowing decision-making module is used for setting a critical pollution factor value through real-time monitored situations, and when the monitored heat-delivery surface pollution factors exceed critical pollution factors, sootblowing of a heat-delivery surface is guided. According to the optimization system and method disclosed by the invention, the purposes of energy-saving sootblowing and sootblowing as required are fundamentally achieved.

The invention relates to a sub-control phase change heat transfer system. The sub-control phase change heat transfer system comprises a heat absorption device and a heat release device which are mutually communicated through a vapor pipe (11) and a condensed fluid pipe (21) so as to form a sub-control phase change heat transfer loop. The sub-control phase change heat transfer system is characterized by comprising an airflow regulating valve (6), an airflow regulating valve controller (8), a liquid flow regulating valve (24) and liquid flow regulating valve controller (25), wherein the airflow regulating valve (6) is arranged in the pipeline of the vapor pipe (11) and the opening of the airflow regulating valve (6) is controllable; and the liquid flow regulating valve (24) is arranged in the pipeline of the condensed fluid pipe (21) and the opening of the liquid flow regulating valve (24) is controllable. The invention also provides a sub-control heat transfer method. In the method, the phase change heat transfer parameters of the heat absorption device and the heat release device are respectively independently controlled.

The invention discloses a low-nitrogen condensation wall-mounted furnace and an application method thereof. The low-nitrogen condensation wall-mounted furnace comprises a draught fan, a fume collecting hood, a gas valve and a water-cooling combustor. An inner cavity of a gas distributing pipe of the water-cooling combustor is divided into two independent sections through a block plate, and each section is connected with a gas inlet joint. The gas valve is composed of a main on-off valve, a proportion regulating valve and two on-off valves, the main on-off valve is connected with a main gas inlet pipe, and outlets of the two on-off valves communicate with the two sections of the gas distributing pipe separately. The gas distributing pipe is sectioned, all fire rows or a part of fire rows on the gas distributing pipe are controlled to combust, small duty ratio is reduced, and the problems of flameout and too hot water temperature in summer can be solved. In addition, the constant-speed draught fan is adopted for the wall-mounted furnace, so the problem of corrosion of condensate water to a main heat exchanger can be solved. A ventilation baffle is further arranged at the bottom of the fume collecting hood to solve the problem of excessive CO emission under limit gas test conditions. Through experimental verification, when the small load regulation ratio of the wall-mounted furnace is between 0.35-0.5, the problems of flameout and too hot water temperature in summer can be solved.

The invention provides a coke oven flue waste gas desulfurization and denitrification and waste heat recovery integrated process. Coke oven flue waste gas is subjected to an SCR reaction under the effect of a low-temperature SCR denitrification catalyst to remove nitric oxides in flue waste gas, a sodium-based dry powder absorbent is sprayed to flue waste gas for desulfurization after waste heat is recovered through a waste heat boiler, and desulfurized flue waste gas is discharged up to standard after dust removal is conducted through a filter. The process is free of waste water, waste gas emission and heating, denitrification can be directly conducted, the absorbent can be recycled, investment is reduced, and energy is saved.

The invention refers to a compound double-grade smoke desulfurizing and dust eliminating process which can desulfurize sulfur and eliminate dust effectively. It is made up of the first, the second and the third parts: the first part is ceramics multi-pipe dust catcher or electrostatic dust catcher, it carries on the first grade dust eliminating, it eliminates 90-99% dust in the smoke; the second part is venturi drying and absorbing tower, the sulfur in smoke reacts with desulfurizing liquid and is absorbed, realizes the first grade desulfurizing; the third part is bag desulfurizing and dust catcher, it eliminates the resultant in desulfurizing reaction and carries on secondary dust eliminating to the tiny particles in smoke.

The invention provides an integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery. The integrated system comprises a coke oven, a low-temperature SCR denitrification system, a waste heat boiler, a flue, a pulverizer, a filtering system and a chimney. The coke oven, the low-temperature SCR denitrification system, the waste heat boiler, the filtering system and the chimney are sequentially connected through the flue, a dry powder absorbent inlet is formed in the portion, between the waste heat boiler and the filtering system, of the flue and is connected with an outlet of the pulverizer through a pipeline, and an absorbent inlet is formed in the pulverizer. The system is free from waste water and gas emission and capable of directly carrying out denitrification without heating, absorbent can be used circularly, investment can be reduced, and energy can be saved.

The invention relates to a vertical gas fired boiler, comprising a chimney, a smoke venting cover, an outer boiler furnace, water jackets, a fire tube, hearths and a boiler door tube, wherein the chimney is welded on the smoke venting cover; the smoke venting cover is installed at the top of the outer boiler furnace; an upper hearth is formed between the lower part of the smoke venting cover and each of an upper side plate and an upper embossed plate; the outer boiler furnace is internally provided with the fire tube; a lower hearth is positioned in an inner boiler furnace; the boiler door tube is communicated with the lower hearth; the gap between the periphery of the inner boiler furnace and the outer boiler furnace forms a lower interlayer water jacket; an upper interlayer water jacketis communicated with the upper part of a water containing cavity; and the lower part of the water containing cavity is communicated with the lower interlayer water jacket. The vertical gas fired boiler is characterized in that the fire tube is internally provided with a water tube, the upper hearth is internally provided with an upper horizontal water tube, the lower hearth is internally providedwith a lower horizontal water tube, the upper end of the water tube is welded on the through hole of the upper horizontal water tube, and the lower end of the water tube is welded on the through holeof the lower horizontal water tube. A water interlayer and a horizontal water tank can also be arranged on the smoke venting cover. The vertical gas fired boiler has large heat exchange area and highthermal efficiency.

The invention discloses a combustion optimization method based on coal quality on-line monitoring. The method comprises a coal quality on-line monitoring method, an operation optimization method of apulverizing system based on coal quality on-line monitoring, a refined air distribution optimization method based on coal quality on-line monitoring, and a flue gas oxygen content optimization methodbased on coal quality on-line monitoring. Pulverizing system optimization realizes real-time optimization of the coal mill coal-air ratio, refined air distribution optimization realizes matching optimization of secondary air volume and burnout air volume of all burners, and fuel gas oxygen content optimization realizes total volume optimization. The combustion optimization method can adapt to thechange of coal quality and load to carry out dynamic real-time optimization, the boiler efficiency is effectively improved, and the emission of pollutants NOx is reduced.

The invention discloses an energy-saving emission reduction complete plant which is friendly to the environment and which adopts the double reduction method. The complete plant comprises a high temperature radiator connected with the smoke pipes of industrial kilns and boilers; the high temperature radiator is connected with a purification tower by an exhaust blower; the bottom of the purification tower is provided with a waterway which is connected with a sewage tank; the sewage tank is connected with a clean water basin; the clean water basin is connected with an intake arranged on the purification tower through a chemical neutralizer and a rot-proof pump; the horizontal section of the purification tower is round; the intake is connected with an upright pipe arranged in the center of the purification tower; spiralling internal guide vanes are arranged around the upright pipe; the internal wall of the purification tower is provided with spiralling external guide vanes. The turning directions of the internal guide vanes and the external guide vanes are the same, and the internal guide vanes and the external guide vanes are arranged alternately; a plurality of nozzles are arranged around the upright pipe. The complete plant effectively purifies emission by consuming little energy; the cost of manufacture is low; the pollution of ash and sulfur dioxide is reduced; the complete plant is applicable for purifying the emission of various industrial kilns and boilers.

The invention discloses a thermoelectric-coupling type comprehensive energy-utilizing system based on an air-cooling device and a working method of the thermoelectric-coupling type comprehensive energy-utilizing system. The system comprises the air-cooling device, wherein the air-cooling device is connected with a condensed-water pump, the condensed-water pump is connected to a steam engine through a condensed-water booster pump, a plurality of stages of low-pressure heating systems, a deoxidizing device, a water-feeding pump, a high-pressure heating system and a boiler in sequence, and the steam engine is respectively connected with a generator and the air-cooling device; the air-cooling device comprises an air-cooling central island, wherein the inlet of the air-cooling central island is communicated with a plurality of cold-air inlet channels, the outlet of the air-cooling central island is communicated with a plurality of hot-air outlet channels, a switching valve is arranged on each hot-air outlet channel, the switching valve comprises two valve positions, one valve position is communicated to a residual-heat utilizing user, and the other valve position is communicated to a hot-air temporarily-diffusing channel; and at least one switching valve also comprises a third valve position, the third valve position is communicated to a hot-air recycling-pipeline mother pipe through an air heater, and a plurality of hot-air recycling-pipeline branch pipes are arranged on the hot-air recycling-pipeline mother pipe, are correspondingly converged into the cold-air inlet channels one by one and are communicated to the air-cooling central island.

Method, system, and controller for increasing exhaust gas temperatures through controlled operation of a radiator fan in order to facilitate regeneration of a particulate filter. The method, system, and controller being applicable in systems having an engine which emits exhaust gases having particulates which are captured by the particulate filter.

The invention relates to a slag sensible heat recycling system for an air-cooling dry slag machine. A horizontal segment, close to one side of a lifting segment, of the dry slag machine is provided with a shutter rotation opening-closing mechanism air inlet; the side, away from the lifting segment, of the air inlet is provided with an isolating device; the position, on the inner side of the top ofan outer shell, close to a joint of the dry slag machine and a boiler is provided with a temperature sensor; and the outer wall of the outer shell is provided with a controller, and the top of the dry-slag-machine lifting segment in the air-cooling dry slag machine is connected with a second air preheater and a first air preheater correspondingly through air pipes. The slag sensible heat recycling system for the air-cooling dry slag machine is reasonable in design, the influence of cold air on the operation of the boiler can be effectively avoided, the slag cooling efficiency is improved, meanwhile the slag sensible heat is used sufficiently, the low temperature corrosion environment of the air preheaters is improved, the tail gas temperature of the boiler is raised, at the same time theheat can be recycled by a low temperature economizer to raise the feed-water temperature, the total air volume entering the boiler is controlled, the low nitrogen combustion and low oxygen combustionare achieved, the discharging of NOX from boiler combustion is lowered, the amount of ammonia spraying in SCR area is reduced, and the efficiency of the boiler is improved.

The invention discloses a system and method for a low-load denitration of a boiler. The system comprises a hearth outlet flue, a low-temperature superheater flue, a low-temperature reheater flue, a bypass flue, an economizer flue and a denitration flue. The bypass flue is a bypass of a low-temperature reheater, a low-temperature superheater and an economizer. According to the method, mainly, whenthe smoke temperature of a denitration inlet is too low, some smoke enters the denitration inlet through the bypass flue, thus the smoke temperature of the denitration inlet rises, and thus the denitration system can achieve normal investment under the low-load circumstance of the boiler. The system and the method have environment-friendly and energy-saving effects, adjusting flexibility of a unitcan be improved, the utilization rate of the unit is increased, and economic benefits of the unit are increased.