237 results about "Dry gas" patented technology

A method for improving flowmeter accuracy is provided. The flowmeter comprises at least one flow tube, at least one pickoff sensor attached to the flow tube, at least one driver attached to the flow tube, and meter electronics in communication with the at least one pickoff sensor and driver. The method comprises the steps of vibrating at least one flow tube in a drive mode vibration with the at least one driver and receiving a sensor signal based on a vibrational response to the drive mode vibration from the at least one pickoff sensor. An unremediated density is derived with the flowmeter. An unremediated mass flow is derived with the flowmeter. An extended drive gain is derived with the flowmeter. At least one flow variable is received. A density ratio is calculated. A plurality of wet gas coefficients is provided. A dry gas mass flow rate is calculated with the density ratio and at least one of the plurality of wet gas coefficients.

The invention discloses a process for adsorbing and separating ethane by using catalytic dry gas, and aims to solve the technical problems that in the prior art, the ethane adsorption effect is relatively poor, an adsorbent is not easy to regenerate, the chemical stability is relatively poor, next adsorption can be carried out only after desorption is completed after adsorption saturation, and the working efficiency is low. The process comprises the following steps: S1, pretreating dry gas; s2, preparing an adsorbent; and S3, the dry gas pretreated in the S1 is pressurized to the pressure condition required by the process through a compressor, and then the dry gas is cooled through circulating water and low-temperature refrigerant water in sequence. According to the process, the adsorbent is prepared by loading copper chloride on activated carbon, the prepared adsorbent has a better adsorption effect on ethane, the adsorbent can be regenerated and is good in chemical stability, and through the design of the two adsorption beds, one adsorption bed performs desorption while the other adsorption bed performs adsorption operation; and continuous adsorption and desorption operation can be realized, and the working efficiency is higher.

The invention discloses a suspension bridge main cable with a dehumidification structure and a dehumidification method, the suspension bridge main cable comprises a cable strand, a winding wire and a wrapping tape, the winding wire is wound outside the cable strand, and the wrapping tape is wound outside the winding wire; each dehumidification assembly comprises a dehumidification inner cylinder and a shell, the inner cylinder is fixedly connected with a convex column, the convex column and the shell are integrally formed, an airflow channel is formed between the convex column and the shell, the shell is provided with a second through hole matched with the channel, one end of the channel is communicated with a negative pressure dehumidification mechanism, a moisture absorption layer is arranged outside the shell, and a heating pipe is fixedly connected in the moisture absorption layer; a one-way nozzle and a sliding movable dehumidification assembly are arranged in the inner cylinder, and the assembly sprays a dehumidification medium to the main cable through the nozzle. Compared with the prior art, dry gas can penetrate through the main cable, targeted drying is achieved, false dehumidification is avoided, and the situation that the service life of the main cable is shortened due to moisture is prevented.

The invention relates to a core for a fuel cell humidifier and the fuel cell humidifier. A core for humidifying a dry gas to be supplied to a fuel cell stack using a wet gas, and the core includes: an inner case having openings at both ends; a plurality of hollow fiber membranes, wherein the plurality of hollow fiber membranes are accommodated in the inner shell; a first fixing layer for fixing one side of the hollow fiber membrane; a second fixing layer for fixing the other side of the hollow fiber membrane; and a plurality of first coating portions attached to one side of each of the hollow fiber membranes and coupled to the first fixing layer so as to protrude from the first fixing layer toward the second fixing layer, each of the first coating portions is formed to have a lower hardness than the first fixing layer.

The utility model discloses an integrated heat exchanger suitable for frozen drying machine, including the casing, the casing is equipped with the outlet of drying gas, the inlet of water gas, the coolant outlet and the coolant inlet from top to bottom, the upper portion is equipped with the heat exchanger in the casing, still be equipped with the evaporimeter in the casing, still be equipped with the gas liquid separation chamber of gas in the bottom of casing, the evaporimeter is located heat exchanger below and communicates with the heat medium outlet of heat exchanger, the backflow channel of gas is established between evaporimeter and heat exchanger and the inside of casing, and the gas outlet of evaporimeter and the cold medium inlet of heat exchanger communicate with backflow channel. The utility model divides and sets up the upper and lower end in the casing with heat exchange and evaporation function, can simplify the structure setting in the casing, and the production cost is simplified, after setting evaporimeter below heat exchanger, can realize the step -by -step cooling of airflow from top to bottom, is favorable to the gathering of condensate in the bottom of casing and gas -water separation in the cooling process, thereby guaranteeing the drying effect of gas.

This invention relates to an online maintenance device and method for leveling guide wheels in a rubber diaphragm-sealed dry gas holder. The online maintenance device for leveling guide wheels includes a vertical lifting device, a horizontal guide rail, a horizontal moving device, a power traction device, and a control system. The vertical lifting device consists of a first lifting device, a second lifting device, and a synchronous drive device. The horizontal moving device is mounted on the horizontal guide rail and consists of a moving trolley and suspended guide wheels. One end of the moving trolley is connected to the power traction device via a traction steel wire rope. This invention enables rapid online maintenance and replacement of leveling guide wheels without shutting down the gas holder; it significantly improves the maintenance efficiency of leveling guide wheels while eliminating energy waste, environmental pollution, and safety risks caused by gas holder shutdowns.

The utility model provides a humidifying tank and a breathing machine with the same, the humidifying tank comprises a tank body, the tank body is provided with a humidifying cavity, an air inlet path for dry air to flow in and an air outlet path for humidified air to flow out, the tank body comprises a tank body main body and a cover body, and the cover body comprises a cover body main body and a cover plate. An air inlet path and an air outlet path are defined by the cover plate and the cover main body; the reference plane where the cover plate is located has a first preset direction and a second preset direction which are perpendicular to each other, and a first projection of the first air inlet on the reference plane and a second projection of the second air outlet on the reference plane are sequentially arranged in the first preset direction; in the second preset direction, a third projection of the first air outlet on the datum plane and a fourth projection of the second air inlet on the datum plane are arranged at intervals with the first projection; in the first preset direction, the third projection and the fourth projection are both located between the first projection and the second projection. The humidifying tank solves the problem that a humidifying tank in the prior art is low in humidifying efficiency.

The application belongs to the technical field of generators, and discloses an energy-saving generator set cylinder temperature difference power generation waste heat recovery device, which comprises a generator body, the bottom end of the generator body is fixedly connected with a bottom plate, the top end side wall of the bottom plate is fixedly connected with a control machine box, and a waste heat recovery part is arranged between the bottom plate and the generator body; through nitre powder dissolution heat absorption, cooling water body temperature sudden drop, cylinder cooling strengthening, cam control nitre putting and piston pressurization are triggered, no additional energy consumption, cooling water heat absorption gasification, water vapor is baffle stored by an inclined plate, dry gas is guided to a gas converter for secondary utilization, sponge pad adsorbs liquid water in water vapor, so that the dryness of the gas is ensured, the device realizes double innovation of nitre dissolution heat absorption strengthening cooling and water vapor waste heat gradient recovery, significantly improves generator waste heat utilization rate, the coupling of the cam, impeller and tray in the mechanical linkage design is realized, zero-power-consumption automatic operation is realized, and the device has high industrial application value.

The invention relates to the technical field of osmic acid solution preparation, in particular to an osmic acid solution preparation device and a use method thereof, and solves the technical problems that in the prior art, when a highly toxic osmic acid ampoule bottle is manually treated, the exposure risk of an operator is high, and the dissolution speed of osmic acid crystals is low when the ampoule bottle is directly put into a ground bottle. The invention discloses an osmic acid solution preparation device and a use method thereof. The osmic acid solution preparation device comprises a glass shell, and a moving overturning and clamping assembly capable of clamping and automatically overturning an ampoule bottle, a bottle opening mechanism for breaking off the head of the ampoule bottle, a glass gas outlet pipe system for blowing dry gas into the bottle to transfer crystals and a cover closing mechanism for automatically closing a cover of a receiving bottle are arranged in the glass shell. The full-process automatic sealing operation of transferring the ampoule bottle filled with the osmic acid crystal from bottle opening, overturning and crystal purging to automatic cover closing of the ground bottle is realized, so that an operator is completely isolated from the highly toxic osmic acid crystal and steam thereof in the whole preparation process.

The utility model relates to a perineum dryer, belongs to the technical field of medical instruments, and solves the problems that in the prior art, gas produced by a dry gas production device is directly output towards a perineum area and a crissum area, and the temperature and the humidity of the dry gas output by the dry gas production device are unstable, so that a patient feels uncomfortable. And diseases may be caused seriously. The device comprises a mixing chamber, an output chamber and a crissum output tube, the mixing chamber and the output chamber are integrally formed; the mixing chamber is provided with an input end, and the input end is connected to the output end of the dry gas production device through a pipeline; the mixing chamber and the output chamber are separated through a first end face, and a first through hole is formed in the first end face. And the perianal output tube is communicated to the output chamber. The dry gas output by the dry gas production device is mixed by the mixing chamber, so that the specific stable temperature and humidity of the dry gas output by the output chamber are ensured.

The application discloses a kind of blast furnace top gas downcomer cleaning method and device, method includes the following steps: during blast furnace blowing-off, open the diffuser valve of blast furnace top and the valve on gravity dust collector, dry gas is passed into gas downcomer;Clean through hole is opened on communication pipe, communication pipe is communicated with gas downcomer;Close the valve on gravity dust collector, and stop dry gas into gas downcomer, and cleaning nozzle sprays high-pressure gas to the inner wall of gas downcomer and carries out blowing operation;Stop blowing operation, open the valve on gravity dust collector, and the adherent blown off from the inner wall of gas downcomer falls into gravity dust collector.In blowing operation before starting, the valve on gravity dust collector is closed, can avoid the adherent blown off by gravity dust collector and enter the bag system of blast furnace, when the valve on gravity dust collector is opened, the adherent accumulated in gas downcomer can fall into the bottom of gravity dust collector under the action of pressure and gravity.

The present invention relates to a cartridge of a humidifier for a fuel cell for humidifying dry gas supplied from the outside by using wet gas discharged from a fuel cell stack, and a humidifier for a fuel cell, the cartridge including: an inner case having openings at each end thereof and containing a plurality of hollow fiber membranes; a gas inlet and a gas outlet formed in the inner case; and an adjustment cover movably coupled to the inner case, and adjusting at least one of an inflow area through which the wet gas or the dry gas flows through the gas inlet, and an outflow area through which the wet gas or the dry gas flows out through the gas outlet.

The invention discloses a cold core box core making process, and belongs to the technical field of sand core casting. Comprising the following steps of 1, sand mixing, wherein crude sand and resin are mixed according to a set proportion, and cold core sand is formed; 2, core shooting, wherein cold core sand is shot into a core box through a core shooting machine and is compacted; 3, blowing and catalyzing, namely blowing gasified triethylamine into a core box to trigger rapid hardening by taking dry gas as a carrier; and 4, gas cleaning: removing residual triethylamine by using carrier gas. A traditional cold core box process is improved, the casting mold core of the automobile differential mechanism which is excellent in performance and meets the use requirement can be prepared, and the casting success rate is obviously increased.

The invention discloses an extremely-low-humidity plateau environment test box, an environment control method thereof, electronic equipment and a storage medium. The test box comprises a pressure-bearing test box body, a humidity sensor, a vacuum system, a humidifier, a dry gas supply system, a heating system and a refrigerating system. The humidity sensor is used for detecting the humidity in the pressure-bearing test box body; the vacuum system is used for vacuumizing the interior based on system parameters, so that the vacuum degree of the interior meets test requirements; the humidifier is used for humidifying the interior of the box body when the humidity is lower than the test requirement, so that the humidity meets the test requirement; the dry air supply system is used for inputting dry air into the box body; the heating system is used for heating internal air; and the refrigerating system is used for cooling the internal air. The vacuum system, the humidifier, the dry gas supply system, the heater and the refrigerating system work cooperatively, and the temperature, the pressure and the humidity in the pressure-bearing test box body can be adjusted, so that the pressure-bearing test box body meets the test requirements on equipment in an extremely-low-humidity plateau environment.

A fuel cell humidifier with purification function includes an interconnected humidification component and a purification component. The humidification component contains first and second partitions and multiple hollow fiber membrane tubes. Dry air exchanges heat and moisture with the humid air inside the fiber membrane tubes and is then discharged through the exhaust port of the detection housing. The purification component consists of a supporting housing, a threaded lifting platform, and a quickly replaceable filter element. A handle drives the lifting platform to slide up and down, achieving sealing, locking, and removal of the filter element. The air inlet pipe is threadedly connected to the filter element, ensuring that the air undergoes oil mist adsorption and ultra-fine filtration before flowing into the element. A sensor built into the detection housing monitors the impurity concentration in real time and prompts for replacement. By adding a secondary purification and sealing device to the external filtration system, a clean and uniformly humidified air source is provided for the fuel cell, simplifying the maintenance process and improving system stability and reliability.

The application discloses a dry gas deep desulfurization process. The process comprises the following steps: (1) removing hydrogen sulfide from refinery dry gas through a first-stage amine liquid absorption tower; (2) removing organic sulfur from tail gas of the first-stage amine liquid absorption tower in a low-temperature absorption tower; (3) sequentially exchanging heat between the absorption tail gas and raw dry gas, and between the absorption tail gas and hydrolysis tail gas, and then heating the absorption tail gas, and then inputting the absorption tail gas into a hydrolysis reactor to convert carbonyl sulfur into hydrogen sulfide; and (4) inputting the hydrolysis tail gas into a second-stage amine liquid absorption tower, and countercurrently absorbing the hydrolysis tail gas with lean amine liquid in the tower to remove hydrogen sulfide in the dry gas. The application can purify and remove sulfides in the dry gas, reduce the content of organic sulfur and hydrogen sulfide in the gas, reduce the content of SO2 in flue gas discharged from a heating furnace of each subsequent device, and ensure safe, environmentally-friendly and efficient and stable operation of the heating furnace of the whole plant.

The application discloses a high-efficiency fountain pen nib drying cabinet, which comprises a cabinet body, a main body space is arranged in the cabinet body, a preliminary treatment assembly is arranged on one side of the main body space, a drying assembly is arranged on the other side of the main body space, a plurality of nibs are arranged on the preliminary treatment assembly and the drying assembly, and the drying assembly comprises a dryer, a rotating chain, a fixed rack, a bearing roller, a rotating gear and a blowing pipe. The water on the outer surface of the nib is continuously wiped by the water absorption material, so that the water stains and other residues on the outer surface of the nib are preliminarily removed, the subsequent drying treatment is facilitated, the drying efficiency is improved, the drying of the nib can conduct gas to the inside of the nib, the inside of the nib can receive the flow of dry gas, water vapor and water drops and the like are taken away, meanwhile, the outer surface of the nib rotates to receive the drying of the dryer, the drying has no dead angle, and the effect is good.

The utility model discloses a drying box and a drying device, the drying box comprises a box body and a roller part arranged on the box body, the roller part comprises a roller shaft, a roller body and a roller sliding cover, and the roller body is provided with a first opening; the roller sliding cover can rotate along the roller shaft and seal or open the first opening, and when the roller sliding cover seals the first opening, the roller sliding cover and the roller body form transmission connection; and when the roller sliding cover opens the first opening, the roller sliding cover is separated from the roller body in transmission connection. In this way, when the first opening is opened and closed through rotation of the roller sliding cover and loading and unloading of materials are achieved, the roller body can be driven to rotate through the roller sliding cover during closing, the to-be-dried materials in the roller body can be fully mixed with drying gas, and therefore the drying effect can be enhanced, a driving structure does not need to be additionally arranged, and the drying efficiency is improved. And the cost is also saved.

Process for extracting H2S and CO2 from dry gas mixtures containing varying concentrations of methane, hydrogen, nitrogen, CO, by atmospheric pressure freezing, and for separating H2S and CO2 by controlling the defrosting heat flow, generating two successive sublimation pressures for the separate liquid-phase recovery of H2S and then CO2.

The invention discloses a pre-drying control method for a driving motor. The pre-drying control method comprises the steps that a motor controller obtains the relative humidity of an inner cavity of the driving motor; the relative humidity is compared with a preset humidity threshold value, and a comparison result is sent to a vehicle control unit; when the relative humidity is larger than or equal to a preset humidity threshold value and the gas pressure of the drying gas source system is within a preset pressure range, the whole vehicle controller starts the drying gas source system; and the vehicle control unit controls the dry gas source system to introduce dry gas into the inner cavity of the driving motor so as to replace and discharge damp and hot gas in the inner cavity. The formation of condensation is completely eradicated from the source by monitoring the relative humidity inside the cavity of the driving motor in real time, which is an advanced index of condensation, and actively intervening before the risk occurs.

The present application belongs to the field of environmental detection, and particularly relates to a sample gas constant humidity device and a sample gas constant humidity method, which comprises a water storage tank and a condensing device; the water storage tank is provided with a first air inlet and a first air outlet; the condensing device is provided with a second air inlet and a second air outlet; the first air outlet and the second air inlet are connected through an air pipe; the second air outlet is provided with an air outlet pipe; an opening is arranged on the side wall of the air outlet pipe; a sub-pipe is embedded in the air outlet pipe; the sub-pipe is provided with an adapter; and the adapter extends out of the air outlet pipe from the opening. The present application adopts a water circulation design, thereby avoiding the problem of frequent replacement of parts. By adopting a PLC control unit, the condensing device, a temperature sensor, a humidity sensor and the sub-pipe form a closed closed loop with negative feedback adjustment, so that the sample gas can be kept in a constant humidity state. Air is used as the gas source, thereby avoiding the use of fixed dry gas source and reducing the cost.

The utility model discloses an energy -conserving type double air bellow drying system relates to drying technical field. The utility model discloses: drying box, built -in has the feeding net belt, air supply box, is located drying box's both sides, and the upper side wall of air supply box is linked with drying box, and the upper cavity of air supply box is provided with the air distribution mechanism that links with the air supply mechanism, and the air distribution mechanism is used to send into the hot air in air supply box, exhaust mechanism, and the bottom side wall of drying box is linked with the air inlet end, and the exhaust end is communicated with outside from air supply box, and constructs and is used for the exhaust fan of dehumidification, circulation mechanism, including being located the axial flow fan of air supply box bottom, and the bottom side wall of drying box is linked with the import part of axial flow fan, and the air outlet end of axial flow fan is vertically set up, and the moisture air path of exhaust mechanism and the fresh air path of air supply mechanism pass through the heat exchange box and heat exchange, just can realize through convenient means, and let the dry gas in drying box circulate, and its realization even drying, the purpose of heat reuse.

The present invention provides a dry liquefied gas desulfurization system, which comprises: a pre-scrubber, which comprises a dynamic wave scrubbing pipe and a reverse spray scrubbing section connected with each other, the dynamic wave scrubbing pipe is provided with a sulfur-containing dry gas inlet and a semi-barren liquor inlet, and the reverse spray scrubbing section is provided with a desulfurization solvent inlet, a rich solvent outlet and a dry gas outlet; the dry gas desulfurization tower is provided with a dry gas inlet, a first lean solvent inlet, a semi-lean solution outlet and a desulfurized dry gas outlet, the dry gas inlet is connected with the dry gas outlet, and the semi-lean solution outlet is connected with the semi-lean solution inlet; the liquefied gas desulfurization tower is provided with a sulfur-containing liquefied gas inlet, a second lean solvent inlet, a desulfurized liquefied gas outlet and a desulfurization solvent outlet, and the desulfurization solvent outlet is connected with the desulfurization solvent inlet. The pre-scrubber is utilized, the technological process is optimized, solvent internal circulation and pre-washing functions are achieved, gradient utilization of the semi-barren solution and the desulfurization solvent is achieved, the circulation amount of the rich solvent is reduced, then energy consumption of the solvent regeneration link is reduced, and the economical efficiency of the desulfurization process is improved.

A dry space creation apparatus includes a processing tank, expansion members, an ejection unit, a dry gas supplier, and a controller. The processing tank has an internal space. The expansion members are provided in the processing tank and expand while leaving part of the internal space. The ejection unit ejects gas in the internal space out of the processing tank. The dry gas supplier supplies dry gas to the internal space. The controller performs first control to allow the ejection unit to eject the gas in the internal space out of the processing tank with the expansion members expanding, and then performs second control to allow the dry gas supplier to supply the dry gas to the internal space with the expansion members contracting.

Provided are a cold storage facility defrosting system and method. The cold storage facility defrosting system comprises a cold storage facility body (1) and a dehumidifier (2). The dehumidifier (2) is provided with a desiccant wheel (201), the desiccant wheel (201) comprises a process sector and a regeneration sector, and the dehumidifier (2) reduces internal moisture and removes frost inside the cold storage facility body (1) by means of the desiccant wheel (201). The dehumidifier (2) is provided with a process air inlet (202) and a process air outlet (203), wherein the process air inlet (202) can extract gas to be processed from the interior of the cold storage facility body (1), and the process air outlet (203) can re-convey dry gas obtained after adsorption and dehumidification by the desiccant wheel (201) to the cold storage facility body (1). Throughout the entire dehumidification process of the cold storage facility, the cold storage facility defrosting system does not generate condensed water, such that no drainage is required inside the cold storage facility, thereby ensuring that no significant temperature fluctuation occurs in the cold storage facility.

The invention belongs to the technical field of conveying, and particularly relates to a reaction kettle feeding pipe device and a working method. The reaction kettle feeding pipe device comprises a feeding pipe which is arranged at the upper end of a base disc, an interlayer pipe is arranged in the feeding pipe, and an air cavity is formed between the outer wall of the interlayer pipe and the inner wall of the feeding pipe; the gas inlet pipe is arranged on the outer wall of the feeding pipe and used for conveying dry gas into the gas cavity; the sealing plates are arranged in the base disc in a sliding mode, and the two sealing plates slide in the radial direction of the base disc so as to open and close the interlayer pipe; the adjusting part is rotationally arranged in the feeding pipe and is linked with the sealing plate; when the two sealing plates move in the opposite directions, the adjusting piece is driven to rotate in the forward direction, and the adjusting piece rotates in the forward direction to open a first air hole formed in the interlayer pipe so that dry gas can flow into the interlayer pipe. When the two sealing plates move away from each other, the adjusting part is driven to rotate reversely so as to close the first air hole formed in the interlayer pipe, and the pressure in the air cavity is increased so that the adjusting part can vibrate relative to the base disc.

The utility model discloses a device for measuring moisture in a powder sample. The device comprises a heating unit, a reaction unit, a balance cavity and a detection unit, the heating unit is used as a platform structure, is arranged at the bottom of the reaction unit and is in contact with the reaction unit; the reaction unit is movably arranged on the heating unit and is used for bearing a sample and carrying out contact heating and drying on the sample through the heating unit; the balance cavity is arranged above the reaction unit, forms a closed space with the reaction unit, and is used for carrying out heating reaction on a sample; the balance cavity is further connected with a drying hole which is used for introducing dry gas into the balance cavity. The detection unit is arranged in the balance cavity and is used for detecting the moisture of the gas in the balance cavity. Through a direct contact heating mode, the sample containing disc and the heating unit rapidly conduct heat, so that the analysis speed is high, and the efficiency is high during online measurement; a three-dimensional drying system can be formed, and the ventilation rate is high.

The invention relates to the technical field of fuel cells, and discloses a fuel cell humidifier with a novel structure, the fuel cell humidifier comprises a main body shell and a bundling shell, the bundling shell is assembled on an internal end plate of the main body shell, and the bundling shell is provided with an internal slide block structure; the internal sliding block structure is in sliding fit with an end plate in the main body shell so as to adjust the size of the bundling shell, a hollow fiber membrane tube is arranged in the bundling shell, the hollow fiber membrane tube is fixed with the main body shell through a pouring sealant surface, two ends of the main body shell are detachably connected with end covers, and the end covers are used for being connected with a dry gas path. A pressure regulating valve is installed on the main body shell and used for balancing the pressure difference of a dry path and a wet path, and a connector sliding block is arranged at a connector of the main body shell and is in sliding connection with the connector of the main body shell so as to adjust the direction of the connector of the wet path. The humidifier is used for solving the problems that an existing humidifier is insufficient in anti-compression and anti-impact strength, poor in plasticity and limited in adaptability, and the use stability is affected by differential pressure fluctuation of a dry path and a wet path.

The invention relates to the technical field of special pipe inner wall cleaning, in particular to an intelligent treatment device, method and system for the inner wall of an ultra-long finish rolling pipe, and the method comprises the steps that a degreasing loop is started, degreasing fluid circularly flows through the inner wall of a to-be-cleaned pipe fitting for degreasing, and the degreasing period t1 lasts; switching to a drying loop, introducing dry gas into the inner wall of the pipe fitting to purge the residual degreasing fluid, and continuing for a first drying period t2; switching to a rinsing loop, enabling the rinsing liquid to circularly flow through the inner wall of the pipe fitting for rinsing, and continuing the rinsing period t3; and switching to a drying loop, introducing dry gas into the inner wall of the pipe fitting to remove residual moisture, and continuing a second drying period t4. The device has the advantages that the problems that an existing pipe fitting cleaning technological process is split, operation is not coherent and the like are solved, the treatment efficiency of special pipe fittings is improved, and the secondary pollution risk of the pipe fittings is reduced.

The application discloses a residual oil alkali metal treatment-catalytic cracking combined processing method, which comprises the following steps: (1) mixing residual oil raw materials and alkali metals into a reactor to perform reaction; (2) performing solid-liquid separation on the material after the reaction in step (1) to obtain a solid-phase product and generated oil; and (3) feeding the generated oil obtained in step (2) into a catalytic cracking device, and performing fractionation on the material after the reaction to obtain dry gas, liquefied gas, catalytic cracking gasoline, catalytic cracking light diesel oil, catalytic cracking heavy distillate oil and coke. The method can produce high-quality low-sulfur gasoline fraction, has a long running cycle, does not need high-temperature and high-pressure conditions and has low hydrogen consumption, thereby effectively improving fuel quality, reducing device running cost, realizing energy saving and consumption reduction.