50results about How to "Reduce particle concentration" patented technology

This invention proposes a method for completing an interval of an open-hole injection wellbore penetrating a subterranean formation, said wellbore being communicating with the formation by way of an interface that comprises at least a filter cake invaded zone comprising bridging materials and other embedded solid materials, said method comprising the steps of injecting a clean-up fluid and contacting it with the filtercake for a period of time sufficient to loose some of the other solids embedded in the filter cake; removing the loosened solids by a high-rate displacement fluid comprising suspending additives; and then injecting a dissolving fluid comprising a diverter and an effective amount of a salt or acid capable of dissolving the bridging material.

The invention relates to a device and a method for removing sulfur dioxide and dioxin from sintering flue gas. The lower part of an absorption tower of the device has a Venturi structure; a Venturi shrinkage section is provided with a desulfurizing agent inlet and a circulating ash inlet; a Venturi expansion section is provided with a water spray nozzle; the upper middle part of the absorption tower is provided with an active carbon/coke nozzle and a conical component is arranged opposite to the nozzle; the upper part; the upper part of the absorption tower is provided with a flue gas outlet which is connected with a radially arranged cyclone separator; a hoper at the lower end of the cyclone separator is provided with two outlets, one outlet is connected with an ash bin, and the other outlet is connected with a circulating ash inlet through a spiral return device; a gas outlet on the top of the cyclone separator is communicated with an inlet of a deduster; and a gas outlet of the deduster is connected with a chimney. The sintering flue gas containing SO2 and dioxin enters the absorption tower through the Venturi, and is mixed with slaked lime Ca(OH)2, atomized water and active carbon/coke, which are sprayed in the absorption tower, the Ca(OH)2 absorbs the SO2 under the action of the atomized water and the active carbon/coke absorbs the dioxin to cooperatively remove the two pollutants.

A method and device for regenerating an exhaust gas aftertreatment component for filtering soot particles in an engine having a first cylinder group, exhaust gases being guided through an exhaust gas channel and whose fuel/air mixture ratio is set via a fuel metering system, activated via a control unit, by a control loop for setting a lambda value using a signal of a first exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, having at least another cylinder group, exhaust gases being guided through another exhaust gas channel and whose fuel/air mixture ratio is set via another fuel metering system by another control loop for setting another lambda value based on the signal of another exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, the separate channels joined together downstream to form a shared channel, having a shared catalytic converter.

A cyclone separator with a wear-resisting target section and a guiding device for a circulating fluidized bed boiler. The cyclone separator comprises a separator inlet flue, a separator barrel body connected with an outlet of the separator inlet flue, a separator cone and a separator standpipe, which are successively connected below the separator cylinder body, and a separator central cylinder inserted into the upper part of the separator barrel body. The lower part of the separator central cylinder is provided with a central cylinder necking; the separator inlet flue is a tapered inlet flue, which is provided inside with a smoke guiding boss, and a smoke diversion part at the outlet; the smoke guiding boss and the smoke diversion part are covered with a high-strength refractory wear-resistant material layer; and one or a plurality of soot blowing mouths are arranged surrounding the smoke guiding boss. Optimization on the flow field in the cyclone separator reduces the direct impact of airflow and wear on the refractory wear-resistant material in the target section, and can improve the continuous operation cycle of the circulating fluidized bed boiler.

The invention discloses an automatic fuel adjustment system of a multi-fuel fired boiler, and belongs to the technical field of automatic control. The automatic fuel adjustment system solves the problems that in the prior art, due to the lower pressure of the coal gas of a pipeline, coal gas blasting is easily caused in an existing fuel adjustment system, quality of automatic fuel adjustment is poor, and the heat loss is large. The system comprises an automatic control module, a detection module and a valve module, wherein the automatic control module judges the burning state of the boiler according to the difference value between the overheating steam pressure measuring value detected by the detection module and the preset boiler overheating steam pressure setting value and transmits a corresponding command to the valve module, the detection module is used for detecting various parameters of boiler burning and transmitting the corresponding parameters to the automatic control module, the valve module receives the command from the automatic control module, adjusts fuel of a corresponding fuel layer, and can manually adjust valves in the modules, and the automatic control module is respectively connected with the detection module and the valve module. The invention further provides an automatic fuel adjustment method of the multi-fuel fired boiler. The automatic fuel adjustment system and method of the multi-fuel fired boiler are suitable for fuel adjustment of the multi-fuel fired boiler.

The invention discloses a waste fan blade pyrolysis recovery system and a working method thereof, and belongs to the technical field of resource recovery. The waste fan blade pyrolysis recovery system comprises a crushing system, a circulating fluidized bed boiler system, a pyrolysis reactor, a material collecting and conveying device, a pyrolysis gas-solid separation system and a cracking oil separation system. According to the invention, composite materials in waste blades can be effectively cracked, cracking oil generated by cracking can be recovering, cracking gas is pumped to a hearth to be effectively incinerated, heat value contained in the cracking gas is effectively utilized, pollutants generated in the combustion process can be discharged in a standard reaching mode by means of an environment-friendly device arranged in an original boiler system, and a pyrolysis reaction in a pyrolysis reactor under an anoxic atmosphere effectively avoids the potential problems of dioxin generation and emission, and the like caused by direct incineration of the waste leaves, so that harmless and resourceful treatment of the waste leaves is completely achieved; and before the comprehensive recycling technology of the blade material is mature and utilized on a large scale, the influence of the waste blade on the environment and the like can be effectively solved, and good environmental protection benefits and economic benefits are generated.

The invention relates to an inspection of rod-shaped articles from the tobacco processing industry. According to a method of inspecting the rod-shaped articles, especially filter cigarettes, by using an inspection device, the articles are conveyed along a horizontal axis on test drums and inspected by the inspection device arranged on the test drums. The surrounding air and the tobacco crumbs, before or after entering test zones of testers, are accelerated and/or deflected by air curtains that are generated by air curtain generating units, where the generating units are preferably arranged at the testers and the test drums. The air curtains are formed or directed in the test zones or in a region of the test zones that are spaced or parallel to a surface of the test drums. The device for inspection of the articles, especially the filter cigarettes, comprises the test drums used for conveying the articles preferably for the horizontal conveying and an inspection apparatus arranged on the test drums and used for inspecting the articles conveyed on the test drums. The invention further relates to a machine, especially to a filter installation machine.

The invention discloses an arrangement method of a catalytic cracking tetra-cyclone separator (referred to as a tetra-cyclone). The tetra-cyclone separator system mainly comprises a tertiary cyclone discharge pipe, a material storage tank, a tetra-cyclone gas inlet pipe and a tetra-cyclone. A dilute phase space at the upper part of the material storage tank is provided with a vertical partition plate. The vertical partition plate divides the dilute phase space of the material storage tank into an inertial separation zone and a sedimentation separation zone. Dust-containing flue gas in the tertiary cyclone discharge pipe is introduced from the top of the inertial separation zone, passes through the inertial separation zone and the sedimentation separation zone and then enters the tetra-cyclone through the tetra-cyclone gas inlet pipe at the top of the sedimentation separation zone. Gas subjected to dedusting in the tetra-cyclone enters a downstream critical nozzle. Solid particles separated by the tetra-cyclone enter a bottom material layer of the material storage tank along a dipleg. The inertial separation zone realizes gas and solid separation through difference of gas and solid particles. The sedimentation separation zone realizes gas-solid separation by a lower section gas velocity. Through the above two kinds of particle pre-separation measures, a particle concentration at the inlet of the tetra-cyclone and separation load are reduced. A gas-locking device is arranged at a tetra-cyclone dipleg particle outlet so that backflow of gas in the dipleg is prevented and smooth delivery of particles in the dipleg is guaranteed.

The invention discloses a W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation and relates to the W flame boiler, solving the problem of severe clinkering on the wing walls and the sidewalls commonly existing in the current W flame boiler. The technical scheme is as follows: boiler arches close to the wing walls on the four corners of the W flame boiler are respectively provided with a group of nozzles, and each group consists of a far wing wall dense coal powder flow nozzle, a far wing wall thin coal powder flow nozzle, an oil secondary air nozzle, a first anti-clinkering air nozzle and a second anti-clinkering air nozzle; the far wing wall dense coal powder flow nozzle, the far wing wall thin coal powder flow nozzle, the first anti-clinkering air nozzle and the second anti-clinkering air nozzle are arranged on the boiler arches in a rectangular outline, the oil secondary air nozzle is arranged on the outside of the rectangular outline and is far from a hearth, the first anti-clinkering air nozzle and the second anti-clinkering air nozzle are arranged at one side close to the wing walls and the sidewalls, and the far wing wall dense coal powder flow nozzle is far from the hearth center. The W flame boiler can effectively reduce coal powder and ash particles which are impacted on the water-cooled walls of the wing walls and the sidewalls, thus avoiding clinkering on the wing walls and the sidewalls.

The invention relates to a solvent dewaxing method of low-wax content heavy hydrocarbon oil. The solvent dewaxing method comprises the following steps of mixing one or more raw material oil, petroleum microcrystalline wax and dewaxing solvents, cooling to a filtration temperature, filtering to obtain a dewaxed filtrate and dewaxed cerate, and removing the solvents in the dewaxed filtrate to obtain dewaxed oil, mixing the dewaxed cerate and a deoiling solvent, heating to a filtration temperature, and filtering to obtain a deoiled filtrate and deoiled cerate, wherein a petroleum microcrystalline wax droplet melting point is in a range of 67 to 92 DEG C and a mass ratio of the petroleum microcrystalline wax to the one or more raw material oil is in a range of (0.01: 1) to (0.25: 1). Compared with the conventional solvent dewaxing technology, the solvent dewaxing method provided by the invention can effectively remove wax in low-wax content heavy hydrocarbon oil, reduce a dewaxing temperature difference and improve a filtration speed.

The invention discloses a fresh air purifying and dehumidifying all-in-one machine which comprises a machine body (1). The machine body comprises a processing air inlet and a processing air outlet, wherein a plate type primary filter (2) and a pocket type medium efficiency filter (3) are arranged at the processing air inlet in sequence, the outlet end of the pocket type medium efficiency filter is connected with an air feeder (4), a refrigerating evaporator (5) and a silica gel adsorption rotating wheel (6), and a high-efficiency filter (7), an active carbon adsorption filter (8) and an air valve (9) are arranged at the processing air outlet in sequence. The machine body is further provided with a regenerated air inlet which is provided with an air valve (10), a heat recycling condenser (11), a regeneration heating fan (12) and a compressor (13) in sequence. The fresh air purifying and dehumidifying all-in-one machine has the advantages that the air pollution degree in a room can be lowered, the PM2.5 particle concentration can be lowered, and the air with microparticles, second-hand smoking, peculiar smells and the like can be purified. Meanwhile, the humidity in the room can be controlled, mould and the musty smell can be prevented from being generated in the room, and the comfortable humidity for human bodies can be ensured.

The invention relates to a recovery system and method for a desulfurizing agent in a desulfurized gas of a catalytic-cracking regeneration waste gas. The recovery system comprises a desulfurizing tower, a condensing heat exchanger, a mechanical separation purifier, a heating heat exchanger and a filter, wherein a gas outlet of the desulfurizing tower is communicated with a gas inlet of the mechanical separation purifier through a first pipeline; the condensing heat exchanger is mounted in the first pipeline; the heating heat exchanger is mounted in a gas exhaust pipeline of the mechanical separation purifier; the condensing heat exchanger and the mechanical separation purifier are communicated with the filter respectively through second pipelines. The recovery system can be used for effectively decreasing the dew point of an outlet gas from the desulfurizing tower, is used for decreasing water vapor content and the particle concentrations of entrained desulfurizing agent and catalyst in the outlet gas, can be used for recovering most of the desulfurizing agent, and is used for decreasing the discharge loss of the desulfurizing agent, decreasing a running cost and meanwhile reducingenvironment pollution; through arranging the heating heat exchanger, an exhausted gas can be prevented from entering an environment of which temperature is lower than the temperature of the gas so that a liquid drop can be still immediately condensed and the formation of a rime fog is prevented.

The invention relates to a solvent dewaxing method of low-wax content heavy hydrocarbon oil. The solvent dewaxing method comprises the following steps of mixing one or more raw material oil, petroleum microcrystalline wax and dewaxing solvents, cooling to a filtration temperature, filtering to obtain a filtrate and cerate, and removing the solvents in the filtrate to obtain dewaxed oil, wherein a petroleum microcrystalline wax droplet melting point is in a range of 67 to 92 DEG C and a mass ratio of the petroleum microcrystalline wax to the one or more raw material oil is in a range of (0.01: 1) to (0.25: 1). The solvent dewaxing method provided by the invention can effectively remove wax in low-wax content heavy hydrocarbon oil, reduce a dewaxing temperature difference and improve a filtration speed.

A gas purifying and processing method for exercise environment is provided and includes steps: (a) providing a purification device for exercise environment in an exercise environment, wherein the purification device for exercise environment includes a main body, a purification unit, a gas guider and a gas detection module; (b) detecting a particle concentration of the suspended particles contained in the purified gas in real time by the gas detection module; and (c) detecting, issuing an alarm and/or notification, and notifying an exerciser to stop exercising, and feeding back to the purification device to adjust an airflow rate of the gas guider by the gas detection module, wherein the gas guider discharge a gas at the airflow rate within 3 minutes to reduce the particle concentration of the suspended particles to less than 0.75 μg/m³, wherein the airflow rate is at least 800 ft³/min, and the main body maintains a breathing distance ranged from 60 cm to 200 cm.

The invention relates to a cyclone separator and a solid-gas separation system. The cyclone separator comprises a separator body, an air inlet pipe and an exhaust pipe, wherein the separator body comprises a straight cylinder part and a conical cylinder part which are connected, the diameter of the straight cylinder part is smaller than that of the large end of the conical cylinder part, one end of the straight cylinder part extends into the conical cylinder part, the exhaust pipe is arranged at the upper end of the straight cylinder part, the air inlet pipe is tangentially connected to the upper part of the straight cylinder part and located above the air inlet end of the exhaust pipe in the axial direction of the separator body, and the part, located in the conical cylinder part, of the straight cylinder part is provided with a flow guiding grid structure. The cyclone separator has relatively high gas-solid separation efficiency.

A purification device for exercise environment is provided and includes a main body, a purification unit, a gas guider and a gas detection module. The purification unit, the gas guider and the gas detection module are disposed in the main body to guide the gas outside the main body through the purification unit for filtering and purifying the gas, and discharge a purified gas. The gas detection module detects particle concentration of suspended particles contained in the purified gas. The gas guider is controlled to operate and export the gas at an airflow rate within 3 minutes. The particle concentration of the suspended particles contained in the purified gas, which is filtered by the purification unit, is reduced to and less than 0.75 μg/m³. Consequently, the purified gas is filtered, and an exerciser in an exercise environment can breathe with safety.