36results about How to "Control combustion temperature" patented technology

The invention belongs to the field of tobacco industry and relates to a tobacco pyrolysis and combustion reactor, an analysis system and a method. The tobacco pyrolysis and combustion reactor, the analysis system and the method have the benefits that the fast pyrolysis and combustion reaction of a lot of tobacco shreds under different atmosphere and different temperature conditions can be realized, and the online detection can be carried out on gas phase components like CO, CO2, O2 and H2 in flue gas; meanwhile, a Cambridge filter is used for collecting particle phase components, so that the generation situations of moisture, tar, nicotine, aroma components and/or other harmful components (NH3, HCN, phenol, crotonaldehyde, polycyclic aromatic hydrocarbon, benzopyrene and the like) can be obtained. Through the analysis system, an experimental platform is provided for the mechanism study on the generation of main flue gas components in the tobacco pyrolysis and combustion processes.

The invention relates to a three-dimensional hierarchical air supply combined waste incinerator, in particular to a waste incinerator. The waste incinerator provided by the invention solves the problems of single function and narrow application range of the traditional waste incinerator. In the waste incinerator provided by the invention, the lower end of a feeding device is communicated with one end of a rotary drying pyrolysis device; the other end of the rotary drying pyrolysis device is communicated with a grate type incinerator; the feeding device and the rotary drying pyrolysis device are fixedly installed on a first bracket; two groups of secondary air spray pipes are both communicated with a secondary air main pipe; one group of the two groups of secondary air spray pipes is positioned above a rear arch and arranged on the outer side wall of a rear wall, and the other group of secondary air spray pipes are arranged at the lower end of a front wall; each group of secondary air spray pipes is communicated with a hearth; a high-temperature smoke interface is communicated with a horizontal flue through a pipeline; an intermediate-temperature smoke interface is communicated with a tail flue through a pipeline; and an air interface is communicated with the air outlet of an air preheater through a pipeline. The waste incinerator provided by the invention is used for incinerating waste.

The invention discloses a method using a circulating fluidized bed for rice hull organic acid pretreatment and combustion to prepare nanometer SiO2, belongs to the technical field of chemical engineering, and solves the problems in the existing method of utilizing the rice hulls to prepare high-purity silicon dioxide. The method comprises the following steps: step 1, preparing an organic acid solution for pretreating the rice hulls; step 2, placing the rice hulls into the organic acid solution to be soaked; step 3, utilizing a centrifugal machine to dehydrate the soaked rice hulls, and then using clear water to repeatedly clean the rice hulls; step 4, pumping the cleaned rice hulls and water together into a plate-and-frame filter press to be compressed and dehydrated until the moisture of the rice hulls is 30%; step 5, drying the rice hulls until the water content is 15% below; step 6, feeding the rice hulls into a circulating fluidized bed boiler to be combusted, feeding the rice hull ash after being burnt into a bag type dust remover along with the flue gas, and grinding the rice hull ash collected by the bag type dust remover, so as to obtain the nanoscale active silicon dioxide with the particle size of 50-80 nm and the purity of 98.0-99.6%. The method disclosed by the invention is used for preparing the nanometer SiO2.

The invention discloses a method of reducing fly ash carbon content of a circulating fluidized bed boiler, wherein the method comprises the following steps when the circulating fluidized bed boiler comprises a hearth, a cyclone separator, a vertical pipe and a feedback device: 1) mounting a helical feeder on the upper part of the vertical part, and connecting an oxygen-enriched air generator at the air inlet chamber on the bottom part of the feedback device; and 2) when the circulating fluidized bed boiler operates, the helical feeder conveys the fly ash to the upper part of the vertical part, the fly ash enters the feedback device through the vertical pipe, the coke in the fly ash in the feedback device and the oxygen-enriched air generated by the oxygen-enriched air generator generate an oxygen-enriched combustion reaction, in the reaction, the percent by volume of the oxygen in the oxygen-enriched air is controlled to control the combustion temperature of the fly ash, and the fly ash and the flue gas return to the hearth after the reaction. The method disclosed by the invention can be applied on circulating fluidized bed boilers of burning inferior coal, and the method can greatly increase the combustion reaction speed and standing time of the coke in the fly ash in the high temperature region of the circulating fluidized bed boiler and greatly reduce the fly ash carbon content of the circulating fluidized bed boiler.

The invention discloses a flameless combustion chamber for a Stirling engine and an implementation method of the flameless combustion chamber. The flameless combustion chamber comprises a combustion chamber housing, a combustor and a heat exchanger; the housing consists of an upper housing part and a lower housing part; an exhaust pipe is arranged at the top of the housing; a heat exchanger barrelis arranged at the bottom of the housing; the lower housing part is connected with the top of the heat exchanger barrel into a whole; the top of the heat exchanger barrel, the lower housing part andthe upper housing part form a combustion chamber space; a hot cavity of the Stirling engine is formed in the lower end of the heat exchanger barrel; the top of the heat exchanger barrel separates thecombustion chamber from the hot cavity; the combustor and the heat exchanger are arranged in the housing from the top to the bottom sequentially; the heat exchanger comprises a circle of heat exchangepipes arranged in a reverse-U-shaped manner; and one ends of the heat exchange pipes communicate with the hot cavity of the Stirling engine, and the other ends of the heat exchange pipes communicatewith a reheater, thus a circuiting working medium system is formed. The implementation method comprises the step that the combustion chamber is used for combustion. The flameless combustion chamber and the implementation method have the characteristics that the combustion chamber is uniform in temperature, the combustion efficiency is high and the safety and reliability are achieved. The flamelesscombustion chamber is particularly suitable for the Stirling engine for use.

The invention relates to a moxibustion therapeutic apparatus. The moxibustion therapeutic apparatus has the beneficial effects that the moxibustion therapeutic apparatus comprises a box; an opening is formed in the top surface of the box; a wind board is arranged at the opening; moxa insertion holes are formed in the bottom surface of the box; moxa stick sleeves used for placing moxa sticks penetrate through the moxa insertion holes; a plurality of heat adjusting holes are formed in the side of the box; accordingly, the moxibustion therapeutic apparatus can be suitable for large area moxibustion therapy, is accurate in determining acupoints at fixed points and convenient in adjustment and accurate control of temperature and is safe and reliable; further, a smoke vent is formed in the side of the box and a smoke discharge pipe is connected with the smoke vent and comprises an adjustable hose and a length adjustable smoke discharge support pipe connected with one end of the adjustable hose, thus forming s moxa smoke channel to effectively discharge moxa smoke.

The invention relates to a low-nitrogen combustion device for a fluidized bed boiler. According to the principle of oxynitride generation, through coupling of air staging and recycled flue gas staging technologies, a combustion area with three stages of the strong reducing property, the weak reducing property and oxidability is formed in the height direction of a hearth, meanwhile, the combustion intensity of a dense-phase area of the hearth is remarkably alleviated, the combustion temperature of the dense-phase area of the hearth is controlled, the distribution uniformity of the overall temperature of the hearth is improved, and generation of temperature type oxynitride is restrained; and meanwhile, generation of fuel type oxynitride is greatly lowered, and generated oxynitride can be restored into nitrogen.

The invention belongs to the technical field of high-pressure injection, and particularly relates to a supercharger and an ultrahigh-pressure common rail system with the supercharger. The superchargercan achieve ultrahigh-pressure oil injection, and the variable-oil-injection-rate high-pressure injection can be achieved by using the common rail system. On the one hand, high-pressure injection canimprove the atomization quality, so that the ignition delay period is shortened, but the problem that the fuel injection amount is excessively large possibly occurs. By means of the ultrahigh-pressure common rail system, the oil injection rate can be adjusted to control the oil amount of premixed combustion, and more reasonable gas mixture time, and spatial distribution and the like are formed, so that an oil injection rate curve is controllable. The curve is matched with the change of the rotating speed and load of a diesel engine, so that the combustion temperature and the pressure rise rate are controlled, and the purpose of optimizing the full-work condition is achieved.

The invention discloses a superheated steam boiler of a pure combustion high-sodium coal two-stage medium-temperature separation circulating fluidized bed. The superheated steam boiler of the pure combustion high-sodium coal two-stage medium-temperature separation circulating fluidized bed comprises a hearth; the lower side of the hearth communicates with an isobaric air chamber through a small air cap air distribution plate; a feed pipe, a buried pipe and a return port are arranged at the lower part of the hearth; an outlet of the hearth is turned to downwards move to connect with a first water cooling cavity; the lower part of the first water cooling cavity is gradually shrunk to downwards move to turn for enlargement to connect with a first-grade acceleration settlement separator; the low part of the first-grade acceleration settlement separator is connected with a settlement tank; the bottom of the settlement tank is connected with the return port; the upper part of the first-gradeacceleration settlement tank is connected with a second water cooling cavity; a snakelike pipe low-temperature superheater is arranged at the upper part of the second water cooling cavity; and an outlet of the second water cooling is serially connected with a two-grade volute cyclone separator. First and second water cooling diaphragm wall cavities are formed in the outlet of the hearth for performing the pollution reducing design and prevention of the sodium and potassium high-temperature corrosion on heated surfaces easiest to be polluted, so that the bad coking deposition phenomenon is solved, and the better effect is achieved.

The invention discloses a solid hazardous waste and liquid hazardous waste cooperative disposal incinerator and a disposal method. The solid hazardous waste and liquid hazardous waste cooperative disposal incinerator comprises a first rotary kiln combustion chamber, a first fluidized bed combustion chamber, a second combustion chamber and a rear smoke channel. The first rotary kiln combustion chamber is provided with a feed port, a rotary kiln combustion-supporting air inlet and a waste gas outlet. The first fluidized bed combustion chamber is provided with a fluidized air inlet and a waste gas outlet. A hearth of the first fluidized bed combustion chamber is filled with a quartz sand bed material. A waste liquid spraying device is arranged on the upper side of the quartz sand bed material. The fluidized air inlet is connected with a fluidization draught fan. The waste liquid spraying device is externally connected with a waste liquid pump. The second combustion chamber is provided with two waste gas inlets, a secondary air inlet and a waste gas outlet. The two waste gas inlets are connected with the waste gas outlet of the first rotary kiln combustion chamber and the waste gas outlet of the first fluidized bed combustion chamber correspondingly. Liquid is incinerated in the first fluidized bed combustion chamber, solid is incinerated in a rotary kiln, the corresponding materials are converted into gas-phase substances in the first combustion chambers, and then the gas-phase substances enter the common second combustion chamber, so that the problem that the liquid waste disposal capacity of an existing rotary kiln is not sufficient can be solved.

The invention relates to an alcohol dehydration steam heating system. The alcohol dehydration steam heating system comprises an oxirane heating furnace, a waste alcohol tank, a waste steam buffer tank, a process water heater, a smoke exhaust fan, an air preheater and a chimney, wherein a process steam pipeline is connected with a heat exchanger on the topmost end of a flue, a radiation heater is connected with a process steam output pipeline, waste alcohol is connected with the waste alcohol tank through a waste alcohol conveying pipeline, the waste alcohol tank is connected with a waste liquid gun through the waste alcohol conveying pipeline, the waste liquid gun is arranged in a waste liquid gun inlet, natural gas is connected with a burner through a natural gas pipeline, the burner is arranged in a burner inlet, the smoke exhaust fan is arranged on the topmost end of the flue, the smoke exhaust fan is connected with the air preheater through a smoke exhaust pipeline, the air preheater is connected with the chimney through the smoke exhaust pipeline, a circulation air compensation pipeline which is connected with a circulation air compensation device is additionally arranged on the smoke exhaust pipeline between the smoke exhaust fan and the air preheater, and a recycling pipeline which is connected with a waste steam mixed distributor is additionally arranged on the air preheater.

The invention discloses a circulating fluidized bed boiler system. The circulating fluidized bed boiler system comprises a hearth and a hearth bed surface arranged at the bottom of the hearth, whereinthe hearth bed surface is communicated with a primary air chamber for blasting air; the top of the hearth is communicated with a separator device for separating high-temperature flue gas; the bottomof the separator device is communicated with the bottom of the hearth; a secondary air inlet is formed in the lower part of the side wall of the hearth; a fuel inlet for supplementing fuel powder is formed in the side wall of the hearth between the secondary air inlet and the hearth bed surface; pulverized coal directly falls onto the bed surface through the fuel inlet and heaps up to form a combusting dense phase region, so that the problem that effective combustion is difficultly formed because the pulverized coal is directly blown into the separator by inlet air is avoided and combustion ofthe pulverized coal is more thorough; in addition, through a circulating action of the separator, the thoroughness of combustion and the controllability of the combustion environment in the furnace are improved, the harmful substance content of emitted waste gas is reduced, and thus the technical problems that the existing circulating fluidized bed boiler difficultly meets novel technical requirements on low emission and high-efficiency combustion and the like are solved.

The invention discloses a pure combustion high sodium coal two-stage medium temperature separation circulating fluidized bed saturated steam boiler. The circulating fluidized bed saturated steam boiler comprises a hearth, wherein the lower portion of the hearth communicates with a uniform pressure wind chamber through a small wind cap wind distribution plate, and a feed pipe, a buried pipe and a material return opening are arranged at the lower portion of the hearth; an outlet of the hearth turns downwards and is connected with a first water cooling cavity, the lower portion of the first watercooling cavity gradually shrinks, turns downwards and then increases, the lower portion of the first water cooling cavity is connected with a first-stage accelerated sedimentation separator, the lower portion of the first-stage accelerated sedimentation separator is connected with a subsider, and the bottom of the subsider is connected with the material return opening; and the upper portion of the first-stage accelerated sedimentation separator is connected with a second water cooling cavity, a membrane type wall water cooling shield is arranged at the upper portion of the second water cooling cavity, and an outlet of the second water cooling cavity is connected with a second-stage volute cyclone separator in series. The outlet of the hearth is provided with the first water cooling membrane type wall cavity and the second water cooling membrane type wall cavity, the contamination reduction design and sodium and potassium high temperature corrosion avoidance are carried out on a heating surface which is most prone to being polluted, the phenomena of serious coking and ash deposition are eliminated, and good effects are achieved.