85results about How to "Achieve ultra-low emissions" patented technology

The invention relates to a device and a method for removing sulfur trioxide from coal-fired flue gas. The device comprises a rough stock bin, a screw type feeder, an air gradation mill, a fine stock bin and a weightless type feeder which are connected with each other in turn, wherein the lower part of the weightless type feeder is connected with a main pipeline; air from an air feeder is dried by an air dryer and then is fed into the main pipeline; an alkali absorbent from the weightless type feeder is pneumatically transmitted; a main pipeline terminal is connected with separators; the main pipeline is uniformly divided into a plurality of branches by the separators; a spray gun is respectively connected with each branch; the spray guns are uniformly arranged on a cross section of a flue; a static mixer is arranged on a downstream flue of the spray guns; the alkali absorbents sprayed by the spray guns are uniformly mixed with the flue gas. The device can select different alkali absorbents according to different flue gas conditions and flue positions. The spray guns are used for jetting the alkali absorbents into the flue for absorbing SO3 in the flue gas, so that the harm of SO3 to the operation of the power plant is reduced and the ultralow SO3 emission is realized.

The invention relates to an integrated system for efficiently and synergistically removing multiple pollutants. The integrated system reduces discharge values of smoke, SO2, NOx, mercury, SO3 and other main smoke pollutants to achieve the discharge standard of a fuel gas unit. According to the technical scheme, the system comprises an SCR reactor, low-temperature dust removing equipment, a desulfurizing absorption tower and a wet-type electrostatic dust collector, wherein the inlet of the SCR reactor is connected with a smoke outlet through a tail smoke channel of a boiler improved through low-nitrogen combustion, and SCR denitration catalysts are modified catalysts capable of improving oxidation susceptibility of zero-valent mercury; the inlet of the low-temperature dust removing equipment is connected with the outlet of the SCR reactor to be used for removing dust and SO3; the inlet of the desulfurizing absorption tower is connected with the outlet of the low-temperature dust removing equipment to be used for desulfuration and dust removal; the inlet of the wet-type electrostatic dust collector is connected with the outlet of the desulfurizing absorption tower, and the outlet of the wet-type electrostatic dust collector is connected to a chimney through warming equipment to be used for removing the dust, gypsum fogdrops, the mercury and SO3. The integrated system is used for the technical field of atmospheric pollution prevention.

The invention relates to a method used for controlling the exhaust of NOx out of a high-capacity coal burning boiler by a multi-level reduction wind in the environmental protection technical field. A plurality of layers of series reduction wind air spouts are arranged along the stroke in a reduction area between a main burner area at the lower part of a furnace hearth and a burn-out wind spout arranged at the upper part of the furnace hearth. The air which is sprayed out of the series spouts is equal to 13%-20% of the total air quantity which is required by the combustion of the boiler coal-fired quantity and is divided into two parts: one part is used for controlling the oxygen consistency of the flue gas in the reduction area so as to reduce the exhaust of nitrogen oxides and the spouts in this part are called control spouts, while the other part is used for protecting the water cooled wall in the reduction area and the spouts in this part is called protection spouts; the slagging and high temperature corrosion are avoided by the oxidation ambience around the water cooled wall. The method used for controlling the exhaust of NOx out of a large-capacity coal-fired boiler by a multi-step reduction wind has the advantages of further enlarging the air classification degree, reducing the exhaust of the nitrogen oxides to a greater extent, protecting the water cooled wall in the reduction area against slagging or high temperature corrosion, reducing the increase of ash carbon-containing quantity caused by the classification, etc.

The invention discloses an integrated treating apparatus for exhaust gas of a setting machine. The integrated treating apparatus comprises a spray condensation unit, a wet static oil removing unit, a flue gas discharging unit, an electric control unit and a water treatment unit. The spray condensation unit, the wet static oil removing unit and the flue gas discharging unit are successively connected; the water treatment unit is connected with the wet static oil removing unit and used for treating and recycling waste water produced during treatment of the wet static oil removing unit; and the electric control unit comprises a variety of electric control facilities like an anemometer, a flowmeter and a liquidometer and is used for real-time monitoring and automatic control of each unit of the whole apparatus. According to the invention, water spraying technology and static treatment technology are integrated together instead of simple combination, so integrated wet static technology is realized, the removal rates of particles and oil smoke are increased, ultra-low emission of the oil smoke and the particles is realized, and fire risks brought by dry static treating technology are eradicated; thus, almost zero release is actually realized.

The invention provides a hydrolysis reaction device for organic sulfur in blast furnace gas, belonging to the technical field of fine desulfurization of blast furnace gas. The device comprises a middle flue, a flow baffle, an inlet elbow, an inlet reducing cone, an airflow uniform-distribution plate, a rectification grid, a reactor, a hydrolysis catalyst, an internal support beam, an outlet reducing cone, an outlet elbow and a sound wave soot blower, wherein the middle flue is connected with the inlet elbow of the device; the flow baffle is arranged in the inlet elbow; the inlet elbow is connected with the inlet reducing cone; the airflow uniform-distribution plate is positioned in the inlet reducing cone; the reactor is connected with the inlet reducing cone; the rectification grid is mounted at the uppermost part of the reactor; the internal support beam is arranged in the reactor; a catalyst is placed on the upper portion of the internal support beam and arranged in the reactor; theplacing intervals of all layers of the catalyst are equal; the sound wave soot blower is placed on the upper portion of the catalyst; and the reactor is connected with an external pipeline through the outlet reducing cone and the outlet elbow of the device. The device guarantees that a rear-end coal gas user finally discharges flue gas to achieve ultralow emission of sulfur dioxide.

The invention relates to the field of environmental protection and discloses a three-cycle desulphurization method for wet type ammonia-process desulphurization. The desulphurization method is implemented with a first slurry circulating loop, a second slurry circulating loop and a third slurry circulating loop, wherein in the first slurry circulating loop, slurry having mass concentration of 10%-20% and a pH value of 4.0-5.0 is used for carrying out cycle spraying treatment on flue gas, and the temperature of the flue gas treated by the slurry is 50-60 DEG C; in the second slurry circulating loop, slurry having mass concentration of 10%-15% and a pH value of 5.0-6.0 is used for carrying out cycle spraying treatment on the flue gas; and in the third slurry circulating loop, slurry having mass concentration of 3%-10% is used for carrying out cycle spraying treatment on the flue gas. The invention also discloses a flue gas desulfurization tower or system using the three-cycle desulphurization method. According to the three-cycle desulphurization method, the three independent circulating loops are divided according to the concentration of the slurry, the circulating loops separately control the slurry having different concentrations and pH values for treatment of the flue gas, and the contradiction of high desulphurization efficiency and high oxygenation efficiency of by-products is solved.

The invention provides a circulating fluidized bed boiler and a desulfurization method. The circulating fluidized bed boiler comprises an in-furnace desulfurization system and an out-furnace desulfurization system which are communicated in sequence, wherein the in-furnace desulfurization system comprises a hearth; the hearth is provided with a first inlet, the circulating fluidized bed boiler further comprises a limestone conveying pipeline and a quicklime conveying pipeline, and the limestone conveying pipeline and the quicklime conveying pipeline are communicated with the first inlet. In thewhole process of starting the circulating fluidized bed boiler, when the boiler does not reach the optimal temperature range of the limestone reaction, quicklime (calcium oxide) as a desulfurizing agent is first directly adopted for directly reacting with sulfur dioxide in flue gas in the hearth for desulfurization reaction; when the optimal reaction temperature range of the in-furnace limestonedesulfurization system reaches in the boiler, an out-furnace circulating fluidized bed ash circulation system is established, limestone is fed into by the limestone conveying pipeline for desulfurization of sulfur-containing flue gas, high calcium oxide content in the hearth can be kept all the time so as to achieve the efficient desulfurization effect in the furnace.

The invention discloses a pulverized coal coupled combustion device and a combustion method. The device comprises a gas combustion chamber, and a pulverized coal combustion chamber arranged in the gascombustion chamber; a gas flameless combustor is mounted at the top of the gas combustion chamber; gas is combusted in a flameless mode in a cavity inside the gas combustion chamber and outside the pulverized coal combustion chamber through the gas flameless combustor; a pulverized coal flameless combustor is mounted at the top of the pulverized coal combustion chamber, and penetrates through thetop of the gas combustion chamber; and pulverized coal is combusted in a flameless mode in the pulverized coal combustion chamber through the pulverized coal flameless combustor. The pulverized coalcoupled combustion device can spontaneously maintain the pulverized coal flameless combustion with an uniform temperature field, generated by the gas flameless combustion, as an uniform radiation heatsource, and can stabilize the oxidation under a low-temperature and low-oxygen atmosphere, so that the generation quantity of nitric oxides is greatly reduced, and the ultralow emission of the nitricoxides in the pulverized coal combustion is realized.

The invention discloses a low-vanadium-content wide-active-temperature-window denitration catalyst, which is made from raw materials of 0.05-0.2 by weight of ammonium metavanadate, 0.1-3 parts by weight of ammonium metatungstate or a mixture of 0.1-3 parts by weight of ammonium metatungstate and 0.1-10 parts by weight of ammonium molybdate, 60-80 parts by weight of TiO2, 10-20 parts by weight of an additive, and 15-30 parts by weight of deionized water. Vanadium in the denitration catalyst is controlled at a low content, so that the cost of the catalyst is reduced at a certain degree, and the low vanadium content in the range doesn't cause secondary pollution. Through introduction of the new additive, vanadium in the denitration catalyst is uniformly dispersed, so that vanadium active sites are formed on the surface of the catalyst as much as possible, and the use ratio of vanadium is increased. Furthermore, through introduction of the new additive, the surface acidity and redox performance of the catalyst are improved, thereby improving the performance of the catalyst. The testing result of a pilot-plant test system for simulating industrial smoke and the industrial actual operation of demonstration projects show that the catalyst can well satisfy the operating requirements of variable load conditions in a coal-fired power plant.

The invention relates to a high-humidity flue gas purifying device, which is used for purifying flue gas with water steam and fine particulate matters. The high-humidity flue gas purifying device comprises a heat exchange tube and a turbulence structure, wherein the flue gas can flow through a surface of the heat exchange tube and the turbulence structure, a refrigerant flows in the heat exchange tube, the water steam in the flue gas can be condensed on the surface of the heat exchange tube and surfaces of the fine particulate matters so as to form a water film and liquid drops, the turbulence structure has a bending part, and the flue gas can flow through the bending part and forms a turbulent flow, so that the liquid drops and the fine particulate matters are collided and agglomerated so as to be acquired and removed.

The invention discloses cooling and white smoke eliminating device and method for circulating slurry for a desulfurizing tower of a thermal power plant, and belongs the fields of the flue gas purification and the white smoke elimination of utility boilers and metallurgical coking and relevant industrial boilers, and the like. The side surface of the bottom of the desulfurizing tower in the deviceis provided with electric butterfly valves; the electric butterfly valves, slurry circulating pump inlet pipes, slurry circulating pumps, a slurry cooler, a slurry jetting and boosting device, a slurry circulating pump outlet pipe and top-layer spray layers are connected in sequence. The device can be used for reducing the water replenishing amount of the desulfurizing tower, is used for decreasing the moisture content of flue gas, and is used for further eliminating white smoke. Meanwhile, the invention also provides the cooling and white smoke eliminating method for the circulating slurry for the desulfurizing tower of the thermal power plant. The latent heat of vaporization in the flue gas is recovered; the heat loss of the smoke exhausted from a boiler is further decreased; the moisture carried in the flue gas is reduced; the water resource is saved, and the white smoke from a chimney outlet is eliminated.

The invention discloses a device and a process method for ERDIII cement plant ultra-low emission denitration. The device for ERDIII cement plant ultra-low emission denitration comprises a decomposition furnace and a powder denitration agent conveying unit, wherein the bottom part of the decomposition furnace is provided with a secondary wind inlet which is connected with a cement rotary kiln; thedecomposition furnace comprises a reducing zone, a main burning zone, a reburning zone and a burnout zone from bottom to top; the reducing zone is equipped with a reducing zone saturated steam catalytic burner; the reburning zone is equipped with a reburning zone saturated steam catalytic burner; the main burning zone is connected with tertiary wind; the burnout zone is connected with burnout wind; and the discharge pipe of the powder denitration agent conveying unit is connected with a denitration agent spray gun which is connected with the reburning zone. According to the invention, throughintroduction of a denitration catalyst, the usage amount of ammonia water for denitration is reduced; the cost is saved; ammonia escape is reduced; more economy and environmental friendliness are achieved; and due to reduction of ammonia escape, corrosion to subsequent equipment is avoided.

The invention discloses a glass kiln smoke deep purification process. According to the process, a kiln smoke purification system is adopted for purifying glass kiln smoke. The kiln smoke generated by a glass kiln enters a high-temperature waste heat boiler, and heat energy is recycled for power generation. Kiln smoke coming out from the high-temperature waste heat boiler enters a cyclone dust collector first so as to remove large-particle-size flying ash and then enters a metal sintering filter material dust collector for deep dedusting. The dedusted kiln smoke enters an SCR reactor for denitrification. The denitrified kiln smoke enters a low-temperature waste heat boiler, and heat energy is recycled for power generation. Kiln smoke coming out from the low-temperature waste heat boiler enters a wet desulphurization tower for desulphurization after heat-exchange-cooled by a GGH. The desulphurized kiln smoke is discharged by a chimney after heated by the GGH. Through the glass kiln smoke deep purification process, glass kiln smoke deep purification can be achieved efficiently and stably with low cost.

The invention discloses an intelligent energy-saving automatic control method of a dust removal system in a thermal power plant. The method comprises the following steps that a coal combustion amount,a coal ash content and a flue gas quantity of a unit are acquired in real time, then according to the fire coal amount, fire coal ash content and smoke amount of the unit, a set value Uesp of a secondary voltage U-electricity of a high-voltage power supply of an electric dust remover is calculated, and then the secondary voltage U-electricity of the high-voltage power supply of the electric dustremover is adjusted according to the set value Uesp of a secondary voltage U-electricity of the high-voltage power supply of the electric dust remover; and the actual smoke dust emission concentrationof an outlet of a wet-type electric dust collector is measured in real time, then a set value Uwesp (n) of U-wet electricity of the secondary voltage of the high-voltage power supply of the wet-typeelectric dust remover is calculated according to the actual smoke dust emission concentration of the outlet of the wet-type electric dust remover through a PID mode, and then according to a set valueUwesp (n) of the secondary voltage U-wet-type electric dust collector of the high-voltage power supply of the wet electric dust remover, the secondary voltage U-wet-type electric dust collector of thehigh-voltage power supply of the wet-type electric dust remover is adjusted. According to the method, the high-voltage power supply of the electric dust remover and the high-voltage power supply of the wet electric dust remover can be efficiently and efficiently operated under different working conditions.

The invention discloses an automotive fuel cell combined heat and power generation system. The system mainly comprises a natural gas tank (1), a natural gas compressor (2), an air compressor (3), an air preheater (4), a natural gas reformer (5), a solid oxide fuel cell stack (6), a combustor (9), a water evaporator (10) and a water tank (11). The invention further provides a working method on the basis of the automotive fuel cell combined heat and power generation system. According to the working method, the hydrogen ions in the natural gas are separated by the natural gas reformer (5) to form hydrogen, the hydrogen and high-temperature air passing through the air preheater (4) generate electrochemical reaction in the solid oxide fuel cell stack (6), and the hydrogen and oxygen, which do not generate electrochemical reaction, generate hot gas through the combustor (9). According to the automotive fuel cell combined heat and power generation system and the working method thereof, the natural gas not only can be used for providing power for the vehicles through natural gas engines, but also can generate electric energy and heat energy when the natural gas engines do not work, so as to satisfy certain special purposes.

The invention relates to the field of SO<2> pollutant treatment of coal-fired power plants. The invention aims to solve the problem of high SO<2> emission after desulfurization in the prior art. The invention discloses a coal slime fluidized bed boiler desulfurization collaborative optimization operation method. A desulfurization collaborative optimization operation system comprises the followingmodules: a DCS data acquisition module, an A/D and D/A conversion module, a central processing system module, a prediction control module, a man-machine interaction module and an optimization calculation module. The invention provides the coal slime fluidized bed boiler desulfurization collaborative optimization operation method. According to the method, modeling and optimization calculation are carried out on the process of the whole desulfurization system, and the SO<2> concentration value after optimization calculation is subjected to predictive control, so that the operation cost of the whole desulfurization system is minimized, and the result after optimization solution is subjected to predictive control to obtain the lowest operation cost, thereby realizing the economic and stable operation of SO<2> removal and improving the economic benefits of enterprises.

The invention discloses a flue gas purifying and discharge device and method for a fire grate type biomass power station boiler. The device comprises a biomass boiler, an oxidizing and mixing device,a desulfurization tower, a bag dust remover and a chimney, wherein a primary air hole and a secondary air hole are formed in the biomass boiler; an outlet of the biomass boiler is connected with the desulfurization tower through the oxidizing and mixing device; an outlet of the desulfurization tower is connected with the bag dust remover; a first branch of the outlet of the bag dust remover is connected with the chimney; a second branch is connected with the primary air hole and the secondary air hole of the biomass boiler through a re-circulating fan to form a circulating loop; desulfurization, denitration and dust-removal processes are optimized, so that ultralow emission of pollutants such as biomass boiler flue gas sulfur dioxide, nitric oxide and dust is realized. The device is relatively small in influences on the boiler, flexibly operates according to the load and a practical pollutant condition, is convenient for controlling operation of the whole biomass power plant system, isflexible to operate, and saves water and operation cost.

The invention discloses intelligent continuous mining equipment for strip mine. The intelligent continuous mining equipment for strip mine comprises a rack part and further comprises a cutting part, aloading part, a crushing part, a conveying part and a dust removal system, wherein the cutting part is located on the upper portion of the front end of the rack part, the loading part is located on the lower portion of the front end of the rack part, the conveying part is located on the upper portion of the rack part, the crushing part is located on the right side of the rack part, and the dust removal system is located at the upper part of the rack part. The intelligent continuous mining equipment for strip mine integrates material cutting, loading, crushing, transportation and dust removal,and can replace matched operation of equipment such as a bucket shovel, a bucket wheel excavator, a reversed loader and a belt conveyor in the prior art to form an efficient full-continuous mining process.

The invention relates to a double wet method flue gas desulphurization and dust removal treatment process. The double wet method flue gas desulphurization and dust removal treatment process is characterized in that calcium carbonate and ammonia water or urea are matched in a furnace to remove NO and NO2, then particulate matters and solute carried by first-stage dust removal and desulphurization are cleaned by using second-stage dust removing water through an n-shaped two-stage wet method desulphurization and dust removal process; second-stage water is desulfurized and denitrified by using the characteristics that ammonia is harmless and is low in gaseous conversion temperature; formed ammonium sulfite refluxes for secondary utilization, and a double-alkali method desulphurization process is formed in first-stage dust removing water. The water content in flue gas at the tail end is reduced by adopting a cyclone centrifugal force, and main pollutants such as SO2, NOX and soot in flue gas emission in a boiler can be discharged at ultra-low emission.