254 results about "Coal water" patented technology

The invention relates to the technical field of dechlorination devices, and provides a high-chlorine coal washing dechlorination leaching device which comprises a dechlorination tank body provided with a washing dechlorination area, and a circulation opening is formed in the bottom of the washing dechlorination area; the conveying part is circularly arranged on the dechlorination tank body, the plurality of push plates are arranged on the conveying part, and the push plates are configured to move along the bottom of the washing dechlorination area under the driving of the conveying part; the screen piece is arranged on the circulation opening; the first spray pipe is arranged on the dechlorination tank body and located below the screen piece, the first spray pipe is provided with a first nozzle, and the first nozzle faces the screen piece. According to the technical scheme, the problems that in the prior art, the dechlorination effect needs to be improved when a traditional kettle body is subjected to water washing dechlorination, and a filter screen part in the kettle body is prone to being blocked are solved.

The invention relates to the technical field of coal water slurry additive processing, and particularly discloses a heat exchange device for coal water slurry additive processing, which comprises a reaction kettle, an overhaul bin gate, a rotary sealing mechanism, a first stirring mechanism, a second stirring mechanism, a feeding pipe and a discharging pipe, and the overhaul bin gate is hinged to the front side of the reaction kettle to realize sealed opening and closing. According to the invention, integration of stirring and heat exchange functions and efficient removal of a source of reaction heat are realized; meanwhile, the second stirring mechanism realizes stepless regulation and control of the angles of stirring blades through a built-in electric driving assembly, so that the core technical problems of flowing dead zones, scaling and incapability of adapting to process changes caused by low heat exchange efficiency and function splitting of a traditional device are solved, and the device has the effects of high heat exchange efficiency, deposition prevention, self-cleaning and dynamic and adjustable stirring force.

The utility model relates to the technical field of coal water slurry processing, and discloses a quantitative feeding device for gasified coal water slurry additives, which comprises a mixing barrel, a water inlet pipe is fixedly connected to the upper surface of the mixing barrel, a first feeding hole is fixedly connected to one side surface of the upper surface of the mixing barrel, and a second feeding hole is fixedly connected to the other side surface of the upper surface of the mixing barrel. The additive mixing device has the following advantages and effects that through the arrangement of the mixing barrel, the stirrer and the quantifying barrel, a worker introduces a main material of an additive from the main material end, introduces an auxiliary material from the first feeding hole and the second feeding hole, and starts the stirrer to stir the additive, so that the effect of mixing the additive is achieved; the whole flow control over the additive is achieved through the flow section, the quantitative adding effect is preliminarily achieved, when small-sized quantification is needed, the additive is introduced into the quantification cylinder through the first pump, the telescopic rod ascends synchronously, a small amount of needed additive is extracted, and the small-amount and quantitative feeding effect is achieved.

The invention discloses a gas furnace fly ash co-processing method and system, and belongs to the technical field of solid waste disposal. The method comprises the following steps: S1, grinding raw coal and water to obtain coal water slurry; s2, mixing the coal water slurry and the fly ash to obtain mixed slurry; wherein the water content of the mixed slurry does not exceed 55%, and the wet basis heat value is greater than 2800kcal / kg, so that the mixed slurry can realize self-sustaining combustion after being fed into the furnace; s3, the mixed slurry enters a hearth to be combusted; and S4, high-temperature flue gas generated by combustion enters the next procedure for heat exchange. According to the fly ash co-processing method, on one hand, heat generated by combustion of the coal water slurry can be utilized for heat tracing of the fly ash, so that combustion of the fly ash is achieved, and extra energy consumption is not needed; and on the other hand, the fine fly ash and the coal water slurry are mixed to obtain slurry with certain viscosity, so that the fine fly ash can be effectively prevented from being carried by the airflow and quickly passing through the hearth, the retention time of the fly ash in the hearth is prolonged, and the fly ash is combusted more sufficiently.

The utility model provides a heat transfer strengthening structure, a heat transfer strengthening pipe and a preheating device. The heat transfer strengthening structure comprises a coal water slurry pipe and at least one protrusion distributed on the inner wall of the coal water slurry pipe. The ratio of the height of the protrusions to the inner diameter of the coal water slurry pipe is (1-8): 50. The heat transfer strengthening pipe comprises the heat transfer strengthening pipe structure. The preheating device comprises a shell and the heat transfer strengthening pipe located in the shell. According to the heat transfer strengthening structure, the protrusions are arranged on the inner wall of the coal water slurry pipe and serve as inner wall face modification, blocking during flowing of coal water slurry is prevented, and heat transfer strengthening is facilitated.

The utility model discloses a spiral-flow type coal water slurry process burner. The spiral-flow type coal water slurry process burner comprises a three-channel structure, the three-channel structure sequentially comprises a central oxygen channel, a coal water slurry channel and an outer epoxy channel from inside to outside; the central oxygen channel, the coal water slurry channel and the outer epoxy channel are connected through flanges; a cooling water assembly is arranged on the outer side of the outer epoxy channel; a central oxygen cyclone is fixed on the inner wall of the central oxygen channel and comprises a cyclone bracket and a first cyclone sheet; one end, far away from the burner head, of the rotational flow bracket is in a pointed cone shape; the first swirl piece is formed by stretching a first end face along a curve, and a first adjacent side face of the first swirl piece is fixedly connected with the swirl support. Through a rotational flow form, the mixing effect of oxygen and coal water slurry is enhanced, and the purpose of sufficient mixed combustion is achieved, so that the carbon conversion rate is improved, the yield of carbon monoxide and hydrogen serving as main components in the period of validity is improved, efficient and clean utilization of coal resources is realized, and the production cost is reduced.

The application discloses a kind of concentrated pool coal-water interface video image recognition device and method, comprising: sequentially connected concentrated pool fixed module, mobile module, image acquisition module and image processing module;The mobile module uses movable guide rail, under the guidance of the concentrated pool fixed module, the video information in the concentrated pool is collected by the image acquisition module, and based on image processing module, the video information is analyzed and processed, the number of coal particles is obtained, and then the coal-water interface is identified.The application has the characteristics of non-contact and intelligence by image processing method, with the help of the relatively mature image processing technology and data transmission technology, the dependence on hardware such as sensor is lower, and it is easy to upgrade and transform.

This invention discloses a novel, low-load, high-efficiency thermoelectric decoupling heating system. The system is characterized by replacing the high-pressure bypass section with an extraction section. This extraction section extracts steam from the middle of the superheater and uses this steam to heat the secondary air or drive the induced draft fan. Compared to existing technologies, this invention, after heating the secondary air or driving the induced draft fan, returns the steam to the cold section, thus overcoming the problem of limited extraction capacity in conventional systems. It also allows for changes in the coal-to-water ratio within the boiler under low load conditions, increasing the outlet steam temperature of the superheater and reheater under low load conditions, and avoiding the widespread problem of underheating of main steam and hot reheat steam under low load conditions.

The utility model discloses an abrasion -resistant coal water slurry feed diaphragm pump relates to coal water slurry conveying technical field, including fixed base, four pump body housings are fixedly connected through the fixed stand on the fixed base, both ends of each pump body housing are fixedly connected with fixed end cover in thread, and both sides fixed end cover correspond fixedly connected with inner hose diaphragm and outer hose diaphragm between pump body housing inner chamber, the inner hose diaphragm is inserted to the center of outer hose diaphragm, and one side fixed end cover is buried with pressure sensor between annular gap end position between inner hose diaphragm and outer hose diaphragm, and the structure of double hose diaphragm makes the coal water slurry that is transported only with inner hose diaphragm inside and modular one -way valve contact, and is completely isolated with the pump cavity of pump body housing. Effectively avoid the corrosion and abrasion of the pump cavity of pump body housing to coal water slurry. The deformation of inner hose diaphragm and outer hose diaphragm is closer to the expansion and shrinkage of radial, avoids stress concentration, and makes fatigue life greatly improve.

The application discloses an ultrasonic reinforced multi-stage atomizing nozzle device and an application method and an atomizing treatment system. The application adopts micro-nano aeration and ultrasonic dissolved air technology, two-stage ultrasonic spiral nozzle atomizing technology, bubble atomizing technology and air jet amplification technology, realizes a micro-nano atomizing process under low power consumption and maintenance-free conditions, and has the characteristics of a large nozzle inner hole, good atomizing effect (micro-nano level), no scaling and no blockage during operation, and maintenance-free during operation, and is especially suitable for application in micro-nano physical and chemical processes of high-viscosity fluids. The application is not only suitable for common atomizing fields, but also suitable for seawater desalination, desulfurization and denitrification atomizing, high-salt wastewater evaporation, coal water slurry atomizing and other fields.

The utility model relates to the technical field of slag salvaging devices, in particular to a slag salvaging device for coal water slurry gasification, which comprises a slag salvaging machine, the slag salvaging machine comprises two chain components which are symmetrically mounted inside, each chain component comprises a chain shaft, an arc hole is formed in the narrower end of each chain shaft, a threaded hole is formed in the narrower end of each chain shaft, and the arc holes are communicated with the threaded holes. A mounting cavity is formed in the outer wall of the narrow end of the chain shaft, an arc pin is slidably connected to the inner wall of the arc hole, a connecting hole is formed in the outer wall of the arc pin, and a bolt is in threaded connection with the inner wall of the threaded hole. According to the chain link assembly, the arc pin is inserted into the arc hole in the chain shaft, the bolt is screwed into the threaded hole in the chain shaft, the end of the bolt penetrates through the connecting hole in the arc pin, the arc pin is further fixed, and therefore the situation that when the chain link assembly operates for a long time, the arc pin is loosened due to deformation, and the chain pieces fall off is avoided; and the bolts are screwed out of the arc pins, so that the chain pieces can be conveniently replaced.

The invention discloses a reaction system for producing hydrogen through coal supercritical water gasification. The reaction system comprises a vertical tank body, a heat insulation lining, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe at the lower part of the slag collecting chamber extends out of the vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the coal water slurry distribution pipe; the inlet diffuser is mounted at the bottom head of the vertical tank body; the inlet end of the supercritical water inlet pipe extends out of the bottom head of the vertical tank body to form a supercritical water inlet; a coal water slurry inlet is formed in the coal water slurry distribution pipe; a gas outlet is formed in a top sealing head of the vertical tank body; the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity is realized.

The invention relates to the technical field of low-temperature methanol washing, in particular to a poly-generation acid gas removal method matched with a coal water slurry gasification device and a poly-generation acid gas removal device matched with the coal water slurry gasification device. The use amount of the first-stage CO2-rich methanol is reduced; the technical problem that CO2 gas is polluted by H2S gas in the medium-pressure flash evaporation process is solved by optimally setting the medium-pressure flash evaporation process and adopting a classified flash evaporation and classified washing technology; by optimally setting a medium-pressure flash evaporation process, low-sulfur carbon-rich methanol is generated, and meanwhile, the low-sulfur carbon-rich methanol is subjected to secondary utilization; by optimally arranging the gas stripping process of the re-absorption tower, the first semi-barren liquor methanol, the low H2S methanol, the second H2S-rich methanol and the first H2S-rich methanol are used for carrying out series absorption on the gas stripping gas, so that the method has the characteristic of low comprehensive energy consumption.

This invention discloses a method for hydraulic mining of ultra-steep and steeply inclined coal seams using boreholes, relating to the field of coal mining technology. The method includes a roadway layout in the mining area, with roadway modules arranged in the pseudo-incline uphill and longwall mining face roadways of the steeply inclined coal seam. The borehole hydraulic mining module includes boreholes and a borehole hydraulic mining system, with a drilling water gun fixed to the top of the drill rod. High-pressure water jets generated by the drilling water gun are used to break up the coal body around the borehole, achieving hydraulic mining. The coal and water transport module includes a coal and water gravity flow channel and a gravity flow trench. A flexible protective net is used to isolate the goaf and protect the coal face and the coal and water gravity flow channel. Therefore, this method requires only the lower roadway drilling rig operator, enabling unmanned operation of the coal face and providing a new technical approach for the safe and efficient mining of steeply inclined coal seams.

The invention discloses a reaction device for producing hydrogen through coal supercritical water gasification. The reaction device comprises an inner-layer vertical tank body, an outer-layer vertical tank body, a jacket layer of the inner-layer vertical tank body, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe is arranged at the lower part of the slag collecting chamber and extends out of the outer-layer vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the pipe wall; the inlet diffuser is mounted at a bottom sealing head of the inner-layer vertical tank body and directly faces the outlet end of the supercritical water inlet pipe, a gas outlet extending out of the outer-layer vertical tank body is formed in a top sealing head of the inner-layer vertical tank body, and the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity can be realized.

The application discloses a drilling water-coal separation metering integrated machine, which comprises a drilling machine and a coal-water separation device, the drilling machine is provided with a blowout prevention hole module, and the water-coal outlet of the blowout prevention hole module is connected with the feeding end of the coal-water separation device; the coal-water separation device comprises a tracked vehicle, and an angle-adjustable pipe chain type coal-water separation module is arranged on the tracked vehicle; and the feeding port of the coal-water separation module is connected with the water-coal outlet through a metering module. The drilling machine and the coal-water separation device are integrally designed, the structure is simple, the drilling machine is convenient to use, and the coal-water mixture can be metered before being separated.

1. Name of the product in this design: Dual-drive vibrating spiral coal-water separation equipment. 2. Application of this design: It is used in scenarios such as coal mine drilling and underground coal mining operations. Its core function is to efficiently separate and filter the coal slurry-water mixture generated during the drilling process to ensure that the water quality meets the standards for discharge or recycling. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to the technical field of industrial wastewater treatment and solid waste resource utilization, in particular to a coal-containing wastewater electric flocculation sludge full-quantitative resource recovery system and method, which comprises a coal water adjusting tank, an electric flocculation device, a magnetic separation mechanism, an iron-rich sludge resource treatment mechanism and an aluminum-rich sludge resource treatment mechanism, the coal water adjusting tank, the electric flocculation device and the magnetic separation mechanism are sequentially communicated, and the iron-rich sludge resourceful treatment mechanism and the aluminum-rich sludge resourceful treatment mechanism are both communicated with the magnetic separation mechanism; wherein the electric flocculation device is provided with a magnetic powder feeding mechanism, and the magnetic separation mechanism is reversely communicated with the magnetic powder feeding mechanism. According to the method, high-efficiency separation and gradient recovery of two valuable metals of iron and aluminum can be realized, the product is upgraded from low-value mixed sludge to a high-purity iron-based product and an aluminum-based coagulant, the problem of final treatment of the sludge is thoroughly solved, and resource recycling of solid wastes is realized.

The invention relates to the field of thermal power generating unit energy storage media, and discloses a coal water slurry system for rapid load increasing of a coal-fired unit, and the coal water slurry system is coupled to a pulverized coal furnace of the coal-fired unit. Comprising a water-coal-slurry preparation system, a water-coal-slurry storage system, a water-coal-slurry conveying system and a water-coal-slurry burner which are sequentially connected together through a water-coal-slurry pipeline. The direct-fired pulverizing system of the pulverized coal furnace is coupled with the coal water slurry energy storage system, so that the direct-fired pulverizing system is fully used for providing fuel, energy is quickly released through the energy-stored coal water slurry system, and the load is quickly increased. The load can be increased to a numerical value required by a power grid in a short time, and meanwhile, stable combustion of the boiler is kept.

The application discloses a coal water-structure state recognition method based on terahertz spectroscopy, and relates to the technical field of material property characterization. The method prepares a characteristic state coal sample containing raw coal, collects a terahertz frequency band transmission spectrum and constructs a difference spectrum; three typical mechanism spectra of water-induced polarization absorption, structure scattering enhancement and cavity polarization nonlinearity are extracted through non-negative matrix decomposition to construct a frequency spectrum-mechanism-structure mapping model; the spectrum of a coal sample to be measured is collected and a difference spectrum is constructed, and after solving an activation weight vector, the difference spectrum is matched with characteristic samples to inverse the water-structure state thereof. The method can realize nondestructive and accurate recognition of the water-structure state of coal, adapt to disaster precursor warning such as water inrush in coal mines, and expand the engineering practical value of terahertz technology.

The invention provides a coal water slag metering device based on a crushing mechanism. The coal water slag metering device comprises a metering device body, and a motor is mounted on the metering device body; the metering device body is further provided with a flow adjusting hand wheel. A detection pipe is fixedly connected to an opening in one side of an output pipe of the metering device body, a particle sensor is fixedly connected to the top end of the detection pipe, and a smashing mechanism is fixedly connected to an input pipe of the metering device body. Through the arrangement of the protective cover, the cooling fins, the inlet and outlet pipe, the rotating machine core, the crushing motor, the roller ball sleeve and the grinding roller ball, large-particle coal slag in coal slurry can be prevented from entering the metering device, and normal work of the metering device is guaranteed.

The invention relates to the technical field of mineral processing, in particular to vertical stirring and grinding equipment for coal water slurry. The coal water slurry vertical stirring and grinding equipment comprises a containing assembly, a grinding assembly, a power assembly and a filtering and flow collecting assembly, the containing assembly is provided with a grinding cavity, the grinding cavity is a regular octagonal prism extending in the vertical direction, and the grinding cavity is provided with two sets of oppositely-arranged discharging openings; each group of discharge ports comprises three discharge ports which are respectively formed in three connected side walls of the grinding cavity, the grinding assembly is arranged in the grinding cavity, the power assembly can drive the grinding assembly to rotate around a vertical shaft, the filtering and flow collecting assembly comprises two groups of filtering and flow collecting structures, each group of filtering and flow collecting structures is arranged corresponding to one group of discharge ports, and the filtering and flow collecting structures are arranged in the grinding cavity. Each group of filtering and collecting structures comprises a collecting cabin, a screen and a discharging pipe, the collecting cabin is provided with a collecting cavity, the collecting cavity is communicated with one group of discharging openings at the same time, each discharging opening in the group of discharging openings is blocked by the screen, and the discharging pipe is used for conveying the coal water slurry in the collecting cavity to the collecting cabin.

The application discloses a coal-water separation device, which comprises a base and a caterpillar belt for moving the base, wherein the base is provided with a coal-water separation tank and a water storage tank, and the coal-water separation tank and the water storage tank are communicated through a drain pipe; a filter plate capable of floating is arranged in the coal-water separation tank, a V-shaped receiving plate is arranged below the filter plate, a filter core for secondary separation is arranged below the receiving plate, water separated in the coal-water separation tank flows into the water storage tank through the drain pipe, a coal discharging baffle is arranged on one side of the coal-water separation tank, and the coal discharging baffle is locked through a limiting lock rod; the coal-water separation device can realize coal-water separation and slag-water separation, can separate water from coal to a larger extent, and can collect the separated coal, slag and water, and is suitable for promotion and use.

The application discloses a water coal slurry additive prepared by using industrial by-products, which comprises the following raw material components in parts by weight: amino benzene sulfonic acid 10-20 parts, meta-amino phenol 10-20 parts, sulfite 5-15 parts, a basic adjusting agent in an appropriate amount and water 50-70 parts. The water coal slurry additive is prepared by directly using industrial by-products, realizes resource recycling, and has high slurry concentration, low viscosity, good fluidity and stability.

The utility model discloses a quick closing device for a pneumatic stop valve of a coal water slurry gasification furnace, and belongs to the technical field of pneumatic stop valves in the production process of the coal water slurry gasification furnace. The quick closing device for the pneumatic stop valve of the coal water slurry gasification furnace comprises a filtering pressure reducing valve, the output end of the filtering pressure reducing valve is communicated with a first pipeline, the outer wall of the first pipeline is communicated with a second pipeline, a third pipeline and a sixth pipeline, one end of the second pipeline is communicated with a first pneumatic control valve, and the other end of the second pipeline is communicated with a second pneumatic control valve. One end of the third pipeline is communicated with a second pneumatic control valve, one end of the sixth pipeline is communicated with an electromagnetic valve, one end of the electromagnetic valve is communicated with a fifth pipeline, one end of the fifth pipeline is communicated with a fourth pipeline, and the two ends of the fourth pipeline are communicated with the first pneumatic control valve and the second pneumatic control valve respectively. One end of the first pneumatic control valve and one end of the second pneumatic control valve communicate with air cylinders correspondingly, and one ends of the air cylinders are slidably connected with piston rods.

The application discloses a coal quantity metering device for mine through-hole drilling hydraulic punching, which comprises a mobile track, a bottom plate arranged on the top of the mobile track, a lifting foot arranged on the left side of the bottom plate, a water tank fixedly connected to the top left side of the bottom plate, a water discharge mechanism arranged on the top left side of the bottom plate, a flameproof vibration source motor arranged on the top right side of the water discharge mechanism, a metering linkage conveying device arranged on the front right side, and a control cabinet fixedly connected to the top right rear end of the bottom plate. When separating coal water, the coal water in the filter tank is filtered by the filter plate, and the fine sludge is guided into the bottom of the water tank through the drain pipe. When the filter tank vibrates up and down, the supporting frame shakes up and down, and the lower pressing plate impacts the arc-shaped frame. When the arc-shaped frame is impacted, the filter plate on the top of the arc-shaped frame rises, the coal blocks with greater weight in the filter tank are lifted to the right side, and the coal blocks are conveyed to the right side, so that the coal block conveying is more convenient.

The utility model relates to the technical field of coal water slurry gasification and discloses a coal water slurry gasification burner, which comprises a plurality of pipes and a plurality of nozzles, and flow guide mechanisms are arranged on the plurality of pipes and the plurality of nozzles; under the action of a plurality of sealing pads, the outer coal pipe and the plurality of outer gas pipes are respectively sealed and connected to the inner coal pipe and the plurality of inner gas pipes, so that the coal and the gas are respectively transmitted to the front end of the nozzle through the pipes, the outer coal pipe, the plurality of outer gas pipes, the inner coal pipe and the plurality of inner gas pipes, thereby realizing the combined installation of the burner and ensuring the efficient ejection of the coal, the outer coal pipe, the plurality of outer gas pipes, the inner coal pipe and the plurality of inner gas pipes are separated from each other through cutting welding rings, the burner is convenient to maintain, and when the burner is used, the welding plate can be detachably connected, and only the welding plate arc that conforms to the burner can be customized.

The invention discloses a coal water slurry gasification method and device, and relates to the technical field of coal chemical industry. The method comprises the following steps: in the first start-up process of coal water slurry gasification, introducing cooled shift gas as quench gas into at least one of a detoxification tank, a first shift converter and a second shift converter so as to control the temperature of a catalyst bed, and stopping introducing the cooled shift gas after the temperature of the bed is stable. In the first start-up process of coal water slurry gasification, cooled shift gas from a shift gas ammonia washing tower is sequentially introduced into a detoxification tank, a first shift converter and a second shift converter, bed reaction heat is directly absorbed by utilizing the low-temperature characteristic of the cooled shift gas, and meanwhile, the concentration of reaction components in crude synthesis gas is diluted; therefore, the temperature rise speed is effectively inhibited in the initial adsorption and reaction heat release stages of the catalyst; the temperature of a plurality of reactor beds can be accurately controlled, catalyst sintering inactivation and equipment damage caused by heat accumulation in a traditional mode are avoided, and the safety and operation stability in the start-up process are improved.

The utility model relates to a coal water separation device for coal mine underground, including the collecting box that is equipped with gas suction port, the feed pipe that seals inserts into the collecting box, is equipped with the collecting port that is connected with the collecting pipe on the circumference of feed pipe, a plurality of water inlets are connected to the feed inlet of feed pipe, the underground water pipe is connected to the water inlet, still be equipped with the water jet pipe that is connected with a water inlet in the feed pipe, still set up a plurality of water mist sprays on the water jet pipe. The utility model discloses when using, the gas suction port carries out the air extraction to the collecting box, makes the collecting box to become the negative pressure, the gas and coal dust mixture in the collecting pipe, along the collecting port into the feed pipe, simultaneously, the water in the underground water pipe also enters the feed pipe after passing through the water inlet, and the coal dust contacts with the water mist in the feed pipe, thereby realizes the dust-settling effect, and the water also enters the water jet pipe through the water inlet and sprays from the water mist sprays, realizes the dust-settling effect from inside to outside, thereby realizes the dust-settling effect fully.

The invention provides a safety isolation device, a coal water slurry entrained-flow bed gasifier, an oxygen introduction control method and an oxygen removal control method, and relates to the technical field of gasifiers. The safety isolation device comprises a first connecting pipeline and an oxygen emptying branch, one end of the first connecting pipeline is used for being connected with an oxygen supply system, and the other end of the first connecting pipeline is used for being connected with an oxygen removal system; the other end is connected with an oxygen system; and a second stop valve and a first stop valve are sequentially arranged in the conveying direction of the first connecting pipeline. According to the safety isolation device, the second stop valve is arranged in front of the first stop valve used for communicating the multi-nozzle opposed coal water slurry entrained-flow bed gasifier oxygen system and the oxygen public pipe network, and the first oxygen emptying valve is additionally arranged between the first stop valve and the second stop valve; in the maintenance period of the gasification furnace, the first stop valve and the second stop valve are closed, and the first oxygen emptying valve is opened, so that oxygen in the oxygen public pipe network can be prevented from entering an oxygen system of the gasification furnace, and safety accidents are avoided.