61results about How to "Effective control of emissions" patented technology

The invention discloses a chain coal-fired boiler capable of reducing nitrogen oxide emission. The chain coal-fired boiler capable of reducing nitrogen oxide emission comprises a furnace body internally provided with a furnace hearth, wherein the furnace hearth is jointly defined by a furnace wall, a boiler cylinder and a water cooling wall pipe; a front furnace arch and a rear furnace arch are arranged in the furnace hearth; a chain plate type grate driven by a power mechanism is arranged under the furnace hearth; an air supply device is arranged on the furnace body; a coal supply hopper is arranged in front of the furnace body; an exhaust gas passing pipe penetrating through the boiler cylinder is arranged on the furnace body; the chain plate type grate comprises two oppositely arranged transmission chains; a support rod is arranged between the two transmission chains; a grate plate is hinged to the support rod; the coal supply hopper comprises a coal supply hopper type box; a coal inlet is arranged on the top part of the coal supply hopper type box, and a coal outlet located above the front part of the chain plate type grate is arranged on the bottom part of the coal supply hopper type box; a material distributing roller driven by a power device is rotatably connected to the upper part in the coal supply hopper type box; a plurality of material distributing dialing plates are circularly distributed on the material distributing roller; an adjustable guide funnel located under the material distributing roller is arranged in the coal supply hopper type box. The chain coal-fired boiler capable of reducing nitrogen oxide emission has the advantage and effect that the nitrogen oxide emission can be effectively controlled.

The invention discloses a device and a method for synergic wet method flue gas desulphurization and fine grain removal, and relates to flue gas treatment. The device is provided with a flue gas desulfurization washing device, a desulfurization liquid washing system, a desulfurization liquid circulating pump, an acoustic agglomeration device, a droplet trapping device and a flushing nozzle; the flue gas desulfurization washing device, the acoustic agglomeration device and the droplet trapping device are from top to bottom connected in series to form a whole, the lower part of the flue gas desulfurization washing device is provided with a desulfurization flue gas inlet, a desulfurization liquid inlet and a desulfurization liquid outlet, the desulfurization liquid outlet is connected, through the desulfurization liquid circulating pump, with the desulfurization liquid washing system arranged in the flue gas desulfurization washing device, a desulfurization liquid storage area, a desulfurization washing area, an acoustic agglomeration growth area and a droplet trapping area are successively formed from bottom to top in the direction of flow of flue gas; the opposite side position of the acoustic agglomeration device is provided with a sound source, the sound source is connected with a signal generator by a power amplifier, the top of the droplet trapping device is connected with a purified flue gas outlet, the flushing nozzle is arranged above the droplet trapping device, and the flushing nozzle is connected with a flushing water inlet.

The invention discloses a SNCR-PNCR combined denitration system for a high-temperature furnace and a flue gas denitration method, belonging to the field of treatment of flue gas from high-temperaturefurnaces. The SNCR-PNCR combined denitration system comprises an SNCR pretreatment system and a PNCR system. The SNCR pretreatment system comprises an ammonia-based reductant storage tank, a meteringsystem, an SNCR equalization system, an air compression system and an ammonia-based reductant injection system; and the SNCR pretreatment system controls NOx output concentration at 200-250 mg / m<3>. The PNCR system comprises a fan system, a dehumidification work cell, a PNCR equalization system and a PNCR powder spray gun system; and the PNCR system controls the NOx emission concentration of fluegas to be less than 100 mg / m<3>. The system of the invention comprises the SNCR pretreatment system and the PNCR system; and through cooperation between the SNCR pretreatment system and the PNCR system, the characteristics of low investment and low cost of original SNCR and high efficiency, stability and no pollution of original PNCR are given to full play, and the problems of low efficiency and excessive ammonia slip of SNCR technology are effectively avoided.

The invention provides a method for making oil by double bed cross circulation type pyrolysis of sludge, belonging to the energy environmental protection technical field. Between double beds of a fluidized bed pyrolysis reactor(1) and a fluidized bed combustion reactor(2), inert solid particle bed materials are used as heat carriers for the cross circulation, and the heat generated by pyrolysis carbon residues and incondensable gases burning in the fluidized bed combustion reactor(2) is transferred to sludge in the pyrolysis reactor as the heat source for the pyrolysis of sludge; a high temperature non-mechanical valve (3) is used to control the flow rate of the high temperature inert solid particle bed materials entering the pyrolysis reactor from the combustion reactor and further control the temperature of the pyrolysis reactor; the fluidized bed pyrolysis reactor(1) discharges excessive solid particle materials in the overflow mode, and the inert solid particle bed materials, the pyrolysis carbon residues and incondensable gases are transferred to the combustion reactor in the pneumatic transport mode; the wet sludge is dried by an internal heating type fluidized bed(16); and pyrolysis gases are condensed into oil-water mixture and incondensable gases in a spray tower(7).

The invention relates to a method for producing liquefied natural gas by automatically supplementing carbon by using retort gas as a raw material, which comprises the following steps: adding carbonate carbon supplementing raw powder into coal, mixing, putting into a retort, heating, cooling for coke quenching, screening to obtain a solid clean fuel, directly sending generated CO2 and CO gases into retort gas to be matched with surplus H2 gas, carrying out chemical recovery and deep purification on the spilled retort gas to obtain methane synthetic gas, carrying out methanation to obtain crude synthetic natural gas, carrying out decarbonization, drying and purification to obtain purified synthetic natural gas, and liquefying by copious cooling to obtain the liquefied natural gas. The carbonate mineral is directly added into the coal for the retort, and the CO2 and CO gases generated by thermal decomposition are used as retort gas to supplement carbon; and thus, the method has the characteristics of abundant raw material sources, simple technical process, equipment investment saving, low carbon supplementing cost, favorable economical efficiency and the like, and can be widely used in comprehensive utilization projects of high / medium-temperature retort gas.

The invention discloses a vertical industrial pulverized coal boiler system, which comprises a stokehole pulverization device connected with a pulverized coal boiler body through a combustor, and the pulverized coal boiler body is connected with a chimney through a flue gas processing device. The vertical industrial pulverized coal boiler system is characterized in that: the pulverized coal boiler body comprises a horizontal flue, a hearth respectively communicated with two ends of the horizontal flue, and a vertical smoke well which are arranged in a vertical inverted U shape; the hearth consists of membrane water walls; a position of the hearth communicated with the outlet of the horizontal flue is provided with a slag condensing bank used for preventing high temperature flue gas from slagging; the horizontal flue behind the slag condensing pipe bundle is provided with a superheater and an convection bank inside in turn; the convection bank is connected to upper and lower boiler barrels positioned on upper and lower sides of the horizontal flue; the vertical smoke well is provided with an economizer and an air preheater inside from top to bottom; and the lower part of the vertical smoke well is connected with the flue gas processing device through a connecting flue. The vertical industrial pulverized coal boiler system has the advantages of high integration degree, small occupied area, high combustion efficiency, energy conservation, environmental protection, and wide market application prospect.

A method for producing synthetic oil by self-supplementing carbon by using retort coal gas as a raw material. The method is to add carbonate carbon supplement raw materials with a particle size of ≤80 mesh into the furnace coal in proportion, mix them, put them into a retort furnace for heating, and then After coke quenching and cooling to normal temperature, and then sieving, it becomes a solid clean fuel, and the generated CO2 and CO gas are directly entered into the dry distillation gas to match with the excess H2 gas to achieve the purpose of carbon replenishment. In the present invention, carbonate minerals are directly added to dry distillation furnace coal, and CO2 and CO gases generated by thermal decomposition thereof are used to replenish carbon for dry distillation coal gas. It has the characteristics of rich sources of raw materials, simple process, low equipment investment, low cost of carbon supplementation, and good economy. It can be widely used in comprehensive utilization projects of high and medium temperature dry distillation gas.

The invention relates to powder combustors, in particular to a liquid slagging type low-nitrogen powder combustor. The liquid slagging type low-nitrogen powder combustor comprises a powder spray gun, a primary air chamber and a secondary air chamber and further comprises a slag combustion chamber. The primary air chamber is arranged on one side of the slag combustion chamber, the secondary air chamber is arranged on the other side of the slag combustion chamber, and the primary air chamber is connected with the powder spray gun. A primary low-oxygen reflux cooling air inlet is formed in the slag combustion chamber. A liquid slagging mechanism is arranged on the slag combustion chamber, a slag falling opening of the liquid slagging mechanism is led out of the bottom of the slag combustion chamber, and a slag falling water trough is formed corresponding to the slag falling opening. By means of changing of the slagging manner and the combustion atmosphere of the combustor, emission of nitric oxide, hearth coking, low-heating-value coal dust stable combustion, low-ash-fusion-point coal dust combustion and other problems can be effectively controlled, the coal type adaptation capability can be greatly improved, and the liquid slagging type low-nitrogen powder combustor adapts to low-heating-value and low-ash-fusion point coal dust combustion.

The invention discloses a pressure relieving dust preventing and filtering system for a dual-sealing arch-shaped material guiding chute, and belongs to the technical field of dust treatment environmental protection equipment. The pressure relieving dust preventing and filtering system for the dual-sealing arch-shaped material guiding chute comprises the dual-sealing arch-shaped material guiding chute arranged over a belt, the material guiding chute communicates with a coal falling pipeline and is provided with a plurality of pressure relieving dust preventing and filtering devices and a plurality of adjustable dust shielding closing devices, and the pressure relieving dust preventing and filtering devices and the adjustable dust shielding closing devices are arranged at intervals; and a dual-sealing dust shielding box is arranged at an outlet of the dual-sealing arch-shaped material guiding chute. According to the pressure relieving dust preventing and filtering system for the dual-sealing arch-shaped material guiding chute, the design concept is advanced and unique, the system is simple in structure, small in size, low in weight and suitable for installation of the low position ina plant and equipment space, and the large plant building area does not need to be occupied.