51results about How to "Reduce burning intensity" patented technology

The invention discloses a smoke internal circulation low-nitrogen combustor which comprises an outer barrel. An inner barrel is arranged in the outer barrel. Main gas spray guns are arranged in a clearance between the outer barrel and the inner barrel. A center gas spray gun is arranged in the inner barrel. A mixed gas outlet flow guide shrinkage cover is fixedly connected with the end of the outer barrel and sleeved with a smoke backflow cover. The smoke backflow cover can slide front and back along the axis of the outer barrel. A smoke backflow channel is arranged between the mixed gas outlet flow guide shrinkage cover and the smoke backflow cover. According to the scheme, smoke in a hearth can flow into a flame area of a combustor outlet through the smoke backflow channel, and therefore the oxygen concentration in mixed gas is diluted, the combustion time of fuel is prolonged, the combustion strength is lowered, high-temperature areas are avoided, and finally the aim of reducing NOx emission is achieved. By means of the structure, no circulating smoke pipeline or circulating fan needs to be additionally arranged, and therefore the investment cost is low.

The invention provides an anti-slagging biomass cascade conversion combustion device and relates to a biomass combustion device. The anti-slagging biomass cascade conversion combustion device aims at solving the technical problem that slagging happens easily when straw is combusted through an existing chain furnace. The anti-slagging biomass cascade conversion combustion device is composed of a chain furnace, a steam generator, an air blower, a high-temperature induced draft fan and an air preheater. A secondary air nozzle is arranged on the front wall below a front arch. An overfire air nozzle is arranged on the front arch. A circulating flue gas chamber communicates with a flue opening in the tail of the chain furnace through the high-temperature induced draft fan. A weak primary air chamber communicates with the air blower through the air preheater. A steam-circulating flue gas chamber communicates with the steam generator and the high-temperature induced draft fan. A strong primary air chamber communicates with the air blower through the air preheater. The secondary air nozzle communicates with the air blower. The overfire air nozzle communicates with the air blower. The anti-slagging biomass cascade conversion combustion device effectively solves the problem of slagging of biomass combustion chain grates.

The invention particularly relates to a nitrogen injection fireproofing method for adjacent goafs during tunneling along empty roadways, and solves the problem of difficult fire prevention in the goafs during tunneling. The nitrogen injection fireproofing method for adjacent goafs during tunneling along empty roadways comprises the following steps: determining nitrogen injection flow in the goafs and the time of the nitrogen injection, and starting the nitrogen injection if the following conditions meet anyone of the conditions including the temperature of the goafs over 26 DEG C or daily temperature rise of 1 DEG C; the water temperature of the goafs exceeding 26 DEG C; local parts of the workplace giving signs of fire, such as tar or kerosene odor; preburying nitrogen injection pipelines using a cross bedding method, with the step distance of 40 m, and cycling until the workplace is tunneled. The method applies the nitrogen injection fireproofing method to the fire prevention and control of the goafs during tunneling, not only eliminates the danger of gas explosion, reduces the effect of air leakage, plays the role of cooling, but prevents the self-heating and the spontaneous combustion of coal and reduces burning strength.

The invention belongs to the technical field of turbulent combustors of power plants, and in particular relates to a low-oxynitride and low-load stable combustion device of a turbulent combustor. The stable combustion device comprises two parts, namely, a ramming member and a vortex suppression member, wherein the ramming member is in a conoid structure, and the vortex suppression member is a streamlined structure body formed by two circular-arc surfaces. The stable combustion device is arranged near an outlet of a primary air pipe of the turbulent combustor; and when pulverized coal airflow passes through the stable combustion device, pulverized coal particles are gathered towards an outer ring of the primary air pipe, therefore the pulverized coal concentration is improved, the generation amount of NOx is effectively reduced, ignition heat is reduced, and timely ignition and stable combustion of the pulverized coal airflow under the conditions of low load and combustion of fault coal are facilitated. In addition, by means of the vortex suppression member of the stable combustion device, vortexes at the tail part of the stable combustion device can be effectively prevented from being formed, and the combustor can be prevented from slag-bonding, coking and burning-out.

The invention discloses an opposed firing structure of a boiler. The opposed firing structure comprises a hearth, wherein the hearth is formed by enclosing of a boiler left-side wall, a boiler right-side wall, a boiler front wall and a boiler rear wall; left-side wall burners are distributed on the middle line of the boiler left-side wall along the height direction of the hearth; right-side wall burners are distributed on the middle line of the boiler right-side wall along the height direction of the hearth; a plurality of rows of front-wall burners are distributed on the boiler front wall; a plurality of rows of rear-wall burners are distributed on the boiler rear wall; and the peripheries of the boiler left-side wall, the boiler right-side wall, the boiler front wall and the boiler rear wall are provided with bellows for providing secondary air and over-fired air for the hearth. The opposed firing structure disclosed by the invention has the advantage that on the basis of not influencing the original coal-powder burning mode, the problem of corrosion caused by high temperature of water cooling walls of the side walls is thoroughly solved.

The invention discloses a compound stopping agent for preventing pulverized coal from spontaneous combustion and a preparation method of the compound stopping agent. The compound stopping agent mainly comprises a component A and a component B, wherein the component A comprises 70%-90% of a penetrant and 10%-30% of peroxide; the component B comprises inorganic salt. The component A and the component B are mixed at a weight ratio of 1:(1.5-3) and used as the compound stopping agent. The preparation method comprises steps as follows: firstly, the penetrant is prepared into an aqueous solution, then the peroxide is dissolved in the penetrant, and the mixture is stirred, so that the component A of the stopping agent is obtained; the component A is matched with the inorganic salt of the component B for use. The compound stopping agent has the characteristics of low cost and non-toxic. During the use, the component A and the component B of the stopping agent are jointly and uniformly added to the pulverized coal, the operation is simple, the stopping effect is excellent, and the compound stopping agent has a wide application prospect.

The invention provides an environment-friendly energy-saving boiler. The environment-friendly energy-saving boiler comprises a chassis, a boiler body is fixedly installed on the chassis, and the boiler body is internally provided with a boiler furnace and a reversal chamber which is located at the rear end of the boiler furnace; a combustion engine is arranged at the portion, corresponding to theboiler furnace, of the front end of the boiler body, the front end of the boiler body is further provided with a front smoke box, and the rear end of the boiler body is provided with a rear smoke box;and a first smoke tube group is arranged between the reversal chamber and the front smoke box, a second smoke tube group is arranged between the front smoke box and the rear smoke box, and a chimneybase which communicates with the rear smoke box is arranged on the rear smoke box. The environment-friendly energy-saving boiler is characterized in that an energy-saving condenser is installed on thechimney base and provided with a connecting smoke flue which is connected with a chimney; a smoke recirculating tube is arranged between the chimney base and the energy-saving condenser, the other end of the smoke recirculating tube is connected with an air inlet of the combustion engine, the volume of smoke, sucked into the combustion engine, in the smoke recirculating tube accounts for 10%-16%that of the smoke exhausted in the chimney base, and the volume heat load of the boiler furnace ranges from 850 KW / m<3> to 1,050 KW / m<3>. Not only can the using requirement be met, but also the environment-friendly energy-saving boiler is more energy-saving and environment-friendly compared with an existing hot-water boiler.

The invention relates to a cast-in-place concrete filling tire body. The cast-in-place concrete filling tire body comprises a base body of the tire body and an annular inflation liner which is embedded into the base body of the tire body and is fixedly sealed in the bas body of the tire body. According to the cast-in-place concrete filling tire body, a supporting body is added in a box body of the base body of the tire body to improve the support between the top surface and the bottom surface of the base body of the tire body, and the annular inflation liner is embedded into the base body of the tire body and is capable of supporting each circumferential wall of the base body of the tire body, so that the whole supporting strength of the tire body is higher; once the inflation liner is directly contacted with open fire, the wall of the inflation liner can be burnt, therefore, the burning strength of the inflation liner is low, and the burning time of the inflation liner is short, and furthermore, the problem of the prior art that other objects can be ignited when fillers in the cast-in-place concrete filling tire body are burnt can be solved.

The invention discloses a two-section type combustion device and method for biomass briquettes. The combustion device comprises a feeding device and is characterized in that a heat exchange body is arranged on the lower side of the feeding device, a top combustion device and a bottom combustion device are arranged in the heat exchange body, a hearth is arranged between the bottom combustion device and the top combustion device, an ash device is arranged on the lower side of the bottom combustion device, an ignition device is arranged on the upper side of the top combustion device, a top air inflow device is arranged at the bottom of the top combustion device, a bottom air inflow device is arranged at the bottom of the heat exchange body, and a smoke exhaust device is arranged at the upper portion of the heat exchange body. According to the two-section type combustion device and method, continuous and stable feeding can be achieved, agglomeration is avoided, the excess air coefficient and pollutant discharge are low, and the automation degree is high.

The invention provides a low-nitrogen combustor which comprises a shell. The shell is formed by coaxially connecting a fuel section and a combustion section, the outer wall of the fuel section is vertically connected with a fuel gas connecting pipe, a combustion-supporting air connecting pipe is vertically connected on the outer wall of the combustion section, and the combustion section further comprises a fuel gas channel communicating with the fuel section. The low-nitrogen combustor further comprises an ignition device and a primary fuel gas branch pipeline, the primary fuel gas branch pipeline communicates with the fuel gas channel, a primary fuel nozzle is formed in the primary fuel branch pipeline, the inner side of the combustion section is also connected with a secondary fuel gas annular gap channel and a secondary fuel gas branch pipeline, and one end of the secondary fuel gas annular gap is provided with a plurality of secondary fuel spray pipes. The structure of fuel classification and flue gas internal circulation is adopted, and the combustion-supporting air vertically collides with the air flow sprayed by the primary fuel nozzle and is ignited by a pilot burner. At anoutlet of the combustor, secondary fuel is sprayed out to be added into combustion, high-speed airflow or flame forms local negative pressure, and a low-temperature rich combustion area is formed, sothat NOx is reduced.

The invention relates to a hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle which is arranged on a gasification furnace. The hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle comprises a main fuel nozzle which is arranged at the top of a furnace, two steam nozzles which are arranged at the two sides of a furnace arch and two oxygen supply nozzles which are horizontally arranged in a hedging manner, wherein the nozzles are respectively connected with a coal water slurry source, an oxygen source and a steam source, and the openings of the nozzles lead into a hearth of the gasification furnace. According to the invention, an advanced temperature control technology combining a grading oxygen supply temperature control technology and a steam temperature control technology is adopted, combustion intensity and flame temperature in the furnace are effectively reduced, and the aim that ash at the outlet of the gasification chamber is non-fused solid slag; meanwhile, gasification reaction rate and carbon conversion rate are improved, thus gasification solid deslagging on a 'double high' coal type large-scale pressurization entrained bed in China is realized, and the hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle provided by the invention is especially applicable to industrial application of a high-ash (25-27%) and high-ash-fusing-point (FT is more than 1400 DEG C) coal type large-scale gasification device in China.

The invention relates to a cast-in-place concrete filling tire body. The cast-in-place concrete filling tire body comprises a base body of the tire body and an annular inflation liner which is embedded into the base body of the tire body and is fixedly sealed in the bas body of the tire body. According to the cast-in-place concrete filling tire body, a supporting body is added in a box body of the base body of the tire body to improve the support between the top surface and the bottom surface of the base body of the tire body, and the annular inflation liner is embedded into the base body of the tire body and is capable of supporting each circumferential wall of the base body of the tire body, so that the whole supporting strength of the tire body is higher; once the inflation liner is directly contacted with open fire, the wall of the inflation liner can be burnt, therefore, the burning strength of the inflation liner is low, and the burning time of the inflation liner is short, and furthermore, the problem of the prior art that other objects can be ignited when fillers in the cast-in-place concrete filling tire body are burnt can be solved.