213 results about "Industrial gas" patented technology

The invention discloses an automatic welding device for a rotary alloy furnace tube, and belongs to the technical field of arc welding equipment.The automatic welding device for the rotary alloy furnace tube comprises a base and a U-shaped bin located at the top of the base, and the two ends of the interior of the U-shaped bin are jointly provided with a centering clamping mechanism used for clamping the outer side of the furnace tube; a driving mechanism for providing power for the centering clamping mechanism to clamp the furnace tube is arranged on the outer side of the centering clamping mechanism, and a welding mechanism is arranged on the inner top of the U-shaped bin. A local sealing design is adopted for the inflation mechanism, the annular air bag is attached to the inner wall of the furnace tube after being inflated, an independent cavity communicated with the outside only through a welding seam gap is formed near the welding seam, the protection requirement can be met only by filling the local space with argon, the whole furnace tube or a large-range external space does not need to be filled, and compared with traditional overall argon filling, the argon filling efficiency is greatly improved. The argon consumption is greatly reduced, the industrial gas purchase cost is remarkably reduced, and the production cost investment is reduced.

The invention relates to an industrial gas tank storage place early warning method and system. The method comprises the following steps: acquiring image time sequence data at least representing temperature field distribution of a target monitoring area, generating a temperature image sequence, determining area temperature change characteristics and tank body surface reflection characteristics in the area, and generating reflection area probability distribution of the target monitoring area to determine initial gas leakage probability data of the target monitoring area; generating baseline feature data at least representing background thermal field distribution of the target monitoring area; and performing association processing on the initial gas leakage probability data and the baseline feature data to generate fusion time sequence features and determine a gas leakage diffusion weight so as to correct the initial gas leakage probability data to obtain corrected gas leakage probability data. By adopting the method, the gas leakage probability can be accurately judged by comprehensively utilizing temperature field time sequence information, tank body surface reflection characteristics and background thermal field distribution characteristics under the condition of a complex background thermal field, so that early warning is realized.

The invention discloses industrial gas on-line monitoring equipment, and relates to the technical field of monitoring equipment.The industrial gas on-line monitoring equipment comprises a monitor installed on a rack, and a gas guide pipe used for guiding industrial gas to be monitored by the monitor is arranged outside the rack; a spacing disc is fixed in the air guide pipe, a plurality of disc channels which are uniformly distributed around the axis of the spacing disc are arranged on the spacing disc, and filter plates are mounted in the disc channels; a side box and a side plate are arranged on the two sides of the spacing disc respectively, the side box is close to the industrial gas inlet end of the gas guide pipe, a shaft pipe is rotationally arranged on the spacing disc, the side box is fixed and communicated to the shaft pipe, and the side plate is movably arranged on the shaft pipe. According to the industrial gas online monitoring equipment, by arranging the side box, the side plate and other structures, rapid cleaning of impurities can be completed without shutdown, it is guaranteed that impurity suction and gas monitoring do not affect each other, meanwhile, the two-way collaborative reverse blowing cleaning effect of reverse blowing and suction is formed, synchronous cleaning of the side box is completed, and the service life of the side box is prolonged. And the use efficiency of the industrial gas online monitoring equipment is improved.

The invention belongs to the technical field of desulfurization gas purification, and particularly relates to a desulfurizing agent and a preparation method thereof. The desulfurizing agent is an iron-zinc-calcium composite oxide material with a hierarchical porous structure, and the preparation method of the desulfurizing agent comprises the following steps: performing amination modification on xanthan gum, then mixing the modified xanthan gum with nano cellulose, and then preparing slurry with a metal salt solution containing Fe, Zn and Ca; performing two-way temperature gradient freezing casting and freeze drying to obtain a precursor; and finally, roasting and activating under programmed temperature control. According to the preparation method, nano-scale dispersion of active components is realized by virtue of strong coordination of aminated xanthan gum and metal ions, and a high-strength and through hierarchical pore framework is constructed by virtue of nanocellulose enhancement and freezing casting. The obtained desulfurizer has ultrahigh one-time sulfur capacity, high mechanical strength and excellent structural stability, is complete in form after being used, is convenient for resource recovery, and is suitable for efficient removal of hydrogen sulfide in industrial gases such as refinery gas.

The invention discloses a preparation method of a biomass-based activated carbon desulfurizer. The method comprises the following steps: 1, crushing, cleaning and drying a biomass raw material to obtain a pretreated material; 2, pre-carbonizing and carbonizing to obtain charcoal particles; 3, introducing water vapor to activate the biochar particles to prepare activated carbon particles; 4, mixing and kneading the activated carbon particles and an additive, extruding into strips, and drying to obtain an activated carbon carrier; 5, dipping the activated carbon carrier with alkali to obtain a desulfurizer; the desulfurizer is applied to removal of sulfides in industrial feed gas. According to the desulfurizer, the biomass raw material serves as a carbon source, sufficient adsorption sites and alkaline catalysis sites are provided through water vapor activation pore forming and impregnation loading of alkali components, the desulfurization performance of the biomass-based activated carbon desulfurizer is improved, and the desulfurizer is suitable for deep desulfurization of industrial gas with high CO2 content and containing organic sulfur and inorganic sulfur; the raw materials are renewable, the desulfurization performance is excellent, the application range is wide, the precision is high, and the preparation process is green and environment-friendly.

The invention relates to the technical field of adsorption materials, and discloses a wide-humidity-range moisture absorption aluminum-based MOF material and a preparation method thereof.The preparation method of the wide-humidity-range moisture absorption aluminum-based MOF material comprises the steps that S1, ligand pretreatment is conducted; s2, preparing a metal source; s3, mixing the ligand solution and the metal salt solution, uniformly stirring, transferring into a reaction kettle, and naturally cooling to room temperature after the reaction is completed; s4, centrifuging or filtering and separating the product obtained in S3 to obtain a solid product, washing with deionized water and an organic solvent, and drying to obtain an aluminum-based MOF material; and S5, the aluminum-based MOF material obtained in the step S4 is subjected to surface modification treatment, and the moisture absorption aluminum-based MOF material with the wide humidity range can be obtained. The moisture absorption aluminum-based MOF material with the wide humidity range is an MOF material with the wide humidity range and efficient moisture absorption performance, and has good application prospects in the fields of air dehumidification, water resource collection, industrial gas purification and the like.

The utility model provides industrial gas filling positioning equipment which comprises two supporting frames, a conveying belt arranged between the two supporting frames and a gas storage tank arranged on the conveying belt, fixing pieces and supporting plates are arranged on the supporting frames, a plurality of connecting rods are arranged on the fixing pieces, positioning rods are arranged at one ends of the connecting rods, and the supporting plates are arranged on the supporting frames. A connecting plate is arranged at the other ends of the connecting rods, a plurality of supporting rods are arranged on the connecting plate, and springs are arranged on the supporting rods. The positioning rods, the springs and other structures are arranged, so that the positioning rods can be correspondingly matched according to the sizes of the air storage tanks, the air storage tanks of different sizes can be positioned, and the supporting plates, the positioning plates, the screw rods and other structures are additionally arranged, so that the device is convenient to disassemble, assemble and use; and by arranging structures such as the threaded rod and the sleeve, the height of the fixing piece can be adjusted, corresponding adjustment can be conveniently conducted according to the size of the gas storage tank, and therefore the best positioning effect of the positioning rod on the gas storage tank can be achieved.

A method and system for selecting a design configuration for an industrial gas plant complex, the industrial gas plant complex comprising one or more industrial gas plants and powered by one or more renewable power sources.

The utility model belongs to the field of industrial gas cylinder draining equipment, and particularly relates to an industrial gas cylinder draining frame which comprises a base, a supporting frame is fixedly connected to the base, a turnover frame is rotationally connected to the supporting frame, a gas cylinder positioning assembly is arranged on the turnover frame, and the gas cylinder positioning assembly is used for connecting a gas cylinder to the turnover frame. The industrial gas cylinder draining rack is simple and compact in structure and low in manufacturing cost; the draining state is stable and reliable, and the draining effect is good.

The invention discloses an industrial gas cooling optimization control system, a storage medium and equipment, and belongs to the technical field of industrial automation control. In order to solve the problem that the control precision of an existing industrial gas cooling system (especially equipment such as a final cooling tower) needs to be improved, the system comprises a data acquisition and preprocessing module for acquiring system operation state data, the model prediction control module is used for determining the optimal control quantity of the cooling water mass flow based on the system operation state data and the ARMAX dynamic model, and during prediction, the gas outlet temperature at the moment k is obtained by using the ARMAX dynamic model based on the historical data matrix and the future input matrix as input; and meanwhile, based on an input and output relationship corresponding to a prediction process of the ARMAX dynamic model, determining a control increment of the cooling water mass flow at the moment k, and further obtaining a control quantity of the cooling water mass flow at the moment in combination with the control quantity of the cooling water mass flow at the moment.

1. The name of the design product: gas proportioning device (integration one). 2. The use of the design product: for gas distribution in industrial gas addition and water treatment. 3. The design points of the design product: the overall shape of the product and the structure of A part and B part. 4. The picture or photo that best shows the design points: perspective view. 5. Other circumstances that need to be explained: A part and B part are transparent materials.

The purpose of this invention is to propose an oxygen depressurization explosion-proof electrostatic vacuum noise silencing device, belonging to the field of safe handling of flammable and explosive industrial gases. The device includes a vertical cylindrical body, a bottom air inlet, a top exhaust outlet, supporting legs, and inside the cylinder, a bottom flame arrester, a multi-stage pressure reduction and deceleration assembly, an electrostatic elimination sound-absorbing layer, and a top flame arrester. Through multi-stage U-shaped microporous baffles, progressive pressure reduction and deceleration are achieved; the metal wire sound-absorbing layer eliminates static electricity and absorbs noise; and the upper and lower double-layer flame arresters block the backfire path, completely solving the problems of electrostatic explosion, backfire, and noise pollution during oxygen depressurization. This invention is suitable for high-risk scenarios such as liquid oxygen stations, ensuring the safe production of flammable and explosive chemical facilities, avoiding personal injury and property damage, while meeting environmental protection and noise reduction requirements.

A method comprising: a) producing or treating an industrial gas by a plant (12) comprising heat-receiving units thermally independent from one another, and at least one heat source (22), b) obtaining a compressed gas (26) by compressing a working gas (28), c) dividing the compressed gas into compressed gas streams (32), d) performing heat exchanges between the compressed gas streams and the heat-receiving units, and condensing the compressed gas streams into liquid streams (36), e) expanding the liquid streams and obtaining an expanded stream (46), f) vaporizing the expanded stream by heat exchange with at least the heat source, and obtaining of a gas stream (50), g) obtaining the working gas from at least the gas stream.

The utility model discloses a connecting buffer device for an industrial gas engine, which relates to the technical field of connecting buffer equipment for engines, and comprises a mounting box body, four groups of guide columns are fixedly connected to the inner side of the mounting box body, and an upper mounting sliding plate is arranged above the inner side of the mounting box body; by means of the linkage design of the first damping rod and the second damping rod, vertical vibration of the engine is converted into composite motion of axial compression and transverse stretching or compression, three-dimensional vibration energy dispersion is achieved, a rotation linkage mechanism of the double-side rotating seat effectively avoids single-direction impact overload, and the vibration energy dispersion efficiency is improved. The transmission of vibration to an engine and an external rack is remarkably reduced, a penetrating type forced air cooling system is formed through an air inlet fan and multiple sets of heat dissipation mounting through holes, heat dissipation is directly conducted on a high-heat area at the bottom of the engine, through hole matrix layout is matched with mounting hole positions of engines of different sizes, the fixing function is achieved, meanwhile, the universality of an airflow channel is considered, and heat dissipation efficiency is improved. And the heat dissipation efficiency is improved.

The utility model relates to a kind of liquid ammonia meterable conveying devices, it includes: industrial ammonia storage tank, the industrial ammonia storage tank has industrial gas phase mouth and industrial liquid phase mouth;Vehicle-mounted liquid ammonia tank, the vehicle-mounted liquid ammonia tank has vehicle-mounted gas phase mouth and vehicle-mounted liquid phase mouth;Liquid ammonia delivery component, the liquid ammonia delivery component includes one end with the industrial liquid phase mouth is connected and the other end with the vehicle-mounted liquid phase mouth is connected liquid ammonia delivery pipe, liquid ammonia pump is installed on the liquid ammonia delivery pipe, pressure transmitter one is installed on the liquid ammonia delivery pipe and located in the liquid ammonia pump upstream, pressure transmitter three is installed on the liquid ammonia delivery pipe and located in the liquid ammonia pump downstream, check valve is installed on the liquid ammonia delivery pipe and located between the liquid ammonia pump and the pressure transmitter three and flowmeter is installed on the liquid ammonia delivery pipe and located between the check valve and the pressure transmitter three.Thus can improve filling efficiency, and liquid ammonia utilization is higher.

The application belongs to the field of gas separation and relates to a preparation method of an organic-inorganic hybrid MFI type zeolite molecular sieve membrane. First, an organic template agent and an organic filler are encapsulated into the pore channel of the zeolite molecular sieve membrane; then the zeolite molecular sieve membrane encapsulating the template agent and the organic filler is irradiated with ultraviolet light to partially decompose the organic molecules in the pore channel, so that the zeolite molecular sieve membrane with an organic-inorganic hybrid structure is formed. The zeolite molecular sieve membrane prepared by the method exhibits excellent gas separation performance and has a broad market application prospect in the field of industrial gas separation and purification and environmental governance.

The invention relates to a high-temperature coal gas carbon migration online quantitative monitoring method and system based on an argon internal standard, and belongs to the technical field of blast furnace ironmaking. The system is characterized in that a high-precision gas distribution execution unit comprises multi-channel mass flow controllers connected in parallel and is used for accurately simulating the composition of industrial gas and maintaining the internal standard concentration of argon; the high-temperature-resistant reaction unit is designed based on an industrial hot-blast stove structure, comprises a reactor and a heating system, and accurately reproduces an industrial heating environment; the rapid phase change quenching unit comprises a micro-channel heat exchanger and a low-temperature phase change system and is used for realizing super-rapid cooling; the intelligent analysis processing unit comprises a gas analyzer, an argon standard flow calibration engine and a bidirectional carbon migration model library; the argon standard flow calibration engine is used for obtaining the actual outlet gas flow through back calculation according to the element conservation principle based on the argon concentration detected by the gas analyzer in the outlet gas; and the bidirectional carbon migration model library is used for storing thermodynamic parameters of the carbon precipitation reaction or the carbon elimination reaction and calculating the carbon precipitation amount and the carbon elimination amount.

The invention provides a solid desulfurizer, a preparation method and application, and belongs to the technical field of desulfurizers. According to the invention, iron ions and manganese ions are taken as bimetallic centers and complexed with benzoic acid series organic ligands, alpha-cyclodextrin is added to construct a binary metal organic framework, and calcination is carried out under a protective atmosphere. The molar ratio of the double metals is (1-15): 1, the molar ratio of the total amount of the double metals to the alpha-cyclodextrin is 1: (0.1-0.5), and the molar ratio of the ligand to the iron ions is (2-4): 1. The desulfurizer realizes deep removal of hydrogen sulfide by virtue of the synergistic effect of physical adsorption, chemical adsorption and catalytic oxidation, the sulfur capacity reaches 5.3-6.9 mmol / g, the desulfurizer can be regenerated after being purged by hot inert gas at 160-200 DEG C, the retention rate of three times of regeneration is 84% or above, and the desulfurizer is suitable for desulfurization of industrial gases such as natural gas and biogas and has the advantages of high efficiency, stability and environmental protection.

The invention discloses a high-efficiency low-energy-consumption solvent for removing organic sulfur in gas as well as a preparation method and application of the high-efficiency low-energy-consumption solvent, and belongs to the technical field of gas purification. The solvent is formed by compounding a physical absorption organic solvent, a chemical absorption alcohol amine solution and a nitrogen-doped activated carbon catalyst nanofluid. The nitrogen-doped activated carbon catalyst is prepared by taking coconut shell or shell activated carbon as a raw material, mixing the coconut shell or shell activated carbon with a high-content nitrogen compound, pickling, drying, grinding and calcining by a specific procedure, and the surface of the nitrogen-doped activated carbon catalyst is rich in nitrogen-containing functional groups. When the catalyst is dispersed in an alcohol amine-organic solvent mixed system, a stable carbon nanofluid can be formed, and the heat transfer and mass transfer performance of the system can be remarkably improved. The solvent integrates the advantages of physical absorption and chemical absorption, and shows high absorption capacity and rate in the desulfurization process by virtue of the synergistic effect of the nanofluid; in the regeneration process, the heat and mass transfer efficiency is improved, so that the energy consumption is obviously reduced, and the method is particularly suitable for treating industrial gas containing organic sulfur.

The utility model relates to the technical field of gas detection, in particular to an industrial gas detection device. According to the technical scheme, the device comprises a device base, a detection box is fixed to the upper end of the device base, a cover plate is fixed to the front end of the detection box through locking screws, a controller is installed on the rear side of the detection box, a detection air channel is formed in the detection box, detection air pipes are installed on the rear side of the upper end of the detection air channel, and the detection air pipes are linearly distributed; an electrochemical sensor, an infrared sensor and a semiconductor sensor which are used for detecting different gases are respectively mounted in the detection box, and the upper ends of the detection gas pipes extend out of the detection box. By means of sliding of the sliding block, gas can be guided into the detection gas pipe provided with the corresponding sensor for gas detection, special detection can be conducted on different kinds of gas, the detection accuracy is improved, before detection, gas in the detection gas channel can be emptied, the influence of residual gas on a detection structure is reduced, and the detection efficiency is improved. The detection accuracy is improved.

The invention relates to the technical field of industrial gas purification and carbon capture, in particular to a system and a method for cooperatively capturing CO2 and H2O in flue gas. The flue gas CO2 and H2O synergistic trapping system comprises: a flue gas pretreatment module, which is used for pretreating to-be-treated flue gas; the membrane separation module is connected to the downstream side of the flue gas pretreatment module; the membrane separation module comprises a ceramic membrane separation unit, and a plurality of tubular ceramic membranes with high selective separation performance on CO2 and H2O are arranged in the ceramic membrane separation unit; the compression and purification module is connected to a permeation gas flow outlet of each tubular ceramic membrane of each ceramic membrane separation unit of the membrane separation module and is used for treating permeation gas of the membrane separation module; and the energy recovery module is used for carrying out energy recovery on the trapped gas flowing out of the membrane separation module. According to the invention, the system flow is simplified, the equipment investment is reduced, and more importantly, a high-purity CO2 product is produced.

The utility model relates to the technical field of gas heaters, and discloses a multi-pipeline hot-air blower, which comprises a gas input component, an air inlet interface for inputting gas to be heated and a first sealing cover plate, the air inlet interface is arranged on one side of the first sealing cover plate, and the first sealing cover plate is arranged on the other side of the first sealing cover plate. The first sealing cover plate is provided with a plurality of air inlet holes communicating with the air inlet connector. The gas heating assembly comprises heating pipes and conducting rings, the number of the heating pipes is the same as that of the gas inlet holes, the conducting rings are arranged on the heating pipes in a sleeving mode, the conducting rings are used for being communicated with a power source to heat the heating pipes and further heat to-be-heated gas in the heating pipes, plastic parts are arranged at the two ends of each heating pipe respectively, and the plastic parts are connected with the gas inlet holes in a sealed mode; the gas output assembly comprises an air outlet connector for outputting heated gas and a second sealing cover plate. More gas can be treated at the same time through the multi-pipeline design, the gas heating efficiency is improved, and meanwhile, the situation that the industrial gas to be heated is polluted by metal ions is avoided.

The invention provides a one-way valve and a gas turbine, and relates to the technical field of gas turbine equipment. The one-way valve comprises a shell, a supporting rib, an outer guide ring, an inner guide ring, a valve element and a baffle ring. No support structure obstruction exists in the annular channel between the valve element and the inner guide ring, and a flow channel is smooth. The outer guide ring plays a good role in guiding airflow, air flows out towards the exhaust side along the outer guide ring, flow separation and backflow areas are effectively avoided, pressure loss is reduced, and air self-circulation efficiency is improved. The supporting ribs play a role in supporting the outer guide ring and the inner guide ring, on one hand, a smooth flow channel can reduce pressure loss, and on the other hand, dust and impurities in air can be prevented from being blocked by the supporting ribs and accumulated around the valve element. Dust particles in the air are prevented from being accumulated near the supporting ribs and the valve element, the problems of valve element clamping stagnation and abrasion caused by impurity accumulation are fundamentally prevented, and it is guaranteed that the valve can reliably operate for a long time in the severe environment of an industrial gas turbine.

1. Name of the designed product: gas proportioning device (integration two). 2. Use of the designed product: gas proportioning in industrial gas adding and water treatment. 3. Design points of the designed product: the overall shape and the structure of A part. 4. Picture or photo best showing the design points: perspective view. 5. Other circumstances or explanations: A part is made of transparent material.

The utility model relates to industrial gas separation and purification equipment technical field especially relates to a control system of preventing pressure swing adsorption bed layer fluidization, including raw material gas inlet main pipe, product gas discharge main pipe and a plurality of adsorption purification devices, and adsorption purification device contains raw material gas inlet branch pipe, adsorption tower, product gas discharge branch pipe, and the control system still includes the pressure cylinder of adsorption tower top, pressure sensor and process control regulating valve on product gas discharge branch pipe, the forward depressurization branch pipe and pressure equalizing orifice plate of intercommunication adjacent device. The utility model eliminates fluidization space through the pressure cylinder compaction adsorbent top surface, and process control regulating valve and pressure equalizing orifice plate cooperate and regulate and control pressure difference and flow velocity, solve the adsorbent fluidization pulverization in the operation of pressure swing adsorption device, pipeline vibration and the problem of high cost and high failure rate of existing control scheme, be applicable to all pressure swing adsorption device, especially to large -scale pressure swing adsorption device of low hydrogen raw material gas or macromolecular weight product gas, the effect is particularly remarkable.

The application discloses a lime kiln tail gas carbon dioxide recovery and purification system and method based on membrane separation and multistage adsorption, and belongs to the field of industrial gas separation and recovery. The system comprises a pretreatment unit, a membrane separation system, an adsorption purification system, a deep cooling purification system, and a tail gas reflux system. The system and method of the application can increase the carbon dioxide concentration from 12% to 15% to 35% to 50% through membrane separation and pre-enrichment, realize efficient hydrocarbon removal and impurity removal and deep cooling rectification by adopting three-stage pressure swing adsorption combined with temperature swing adsorption, and realize the efficient recovery of carbon dioxide by combining tail gas reflux circulation and reprocessing, so that the carbon dioxide recovery rate can be significantly improved from less than 70% to more than 90%, the product purity can reach more than 99.5%, the energy consumption can be reduced, the service life of the adsorbent can be prolonged, and the system operation stability can be improved, thereby providing an efficient and feasible solution for industrial carbon emission reduction and resource utilization.

1. Name of the product in this design: Gas cylinder wrench. 2. Purpose of this design: A wrench used when replacing industrial gas cylinders. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This invention provides a method for recycling lithium-ion battery cathode materials, comprising the following steps: discharging and disassembling waste lithium-ion batteries to remove battery electrodes; stripping the battery electrodes to obtain aluminum foil and electrode material; crushing and sieving the electrode material to obtain sieved powder; pressing the sieved powder into shape using a mold; placing the pressed material into a vacuum chamber and using laser decomposition technology to cause a decomposition reaction, obtaining soluble lithium salts, metal oxides and / or elemental metals; removing the product after the reaction is complete; using water or a water leaching solution with industrial CO2 gas as the leaching agent, mixing the leaching agent, the laser decomposition product, and the surfactant evenly, leaching, and filtering to obtain a lithium-rich solution and other metal element slag phases; separating and purifying the lithium-rich solution to obtain lithium carbonate product. The lithium-ion battery cathode material recycling method provided by this invention can precisely target and extract lithium, achieving a high lithium element recovery rate and a short process flow.

The utility model relates to the field of collecting devices, and discloses a fallen ash collecting device of a gas heat-conducting oil furnace for industrial white oil production, which comprises a base, side plates are fixedly connected to two sides of the top end of the base respectively, a movable plate is slidably arranged between the two side plates, and a plurality of hydraulic cylinders are mounted at the top end of the base in an embedded manner. The movable end of each hydraulic cylinder is fixedly connected with the bottom end of a movable plate, a collecting box is fixedly installed at the top end of the movable plate, a motor is fixedly installed on one side of the collecting box, a rotating shaft is rotatably installed on the inner wall of the collecting box in the horizontal direction, and the output end of the motor is fixedly connected with one end of the rotating shaft; a plurality of stirring rods are fixedly connected to the surface of the rotating shaft, a plurality of attaching assemblies are fixedly installed at the top end of the collecting box, a water distribution ring pipe is fixedly installed on the inner wall of the collecting box, and a plurality of spray heads are fixedly installed on the inner side of the water distribution ring pipe.