90 results about "Natural gas consumption" patented technology

The invention relates to the technical field of waste gas treatment, in particular to a novel incineration pretreatment process for high-concentration waste gas in the hazardous waste industry. The method comprises the steps that firstly, waste gas enters a liquid seal system; 2, treating the waste gas by a liquid sealing system; step 3, vacuum analysis; 4, waste gas recovery and liquid sealing agent regeneration; step 5, RTO system processing; in the novel incineration pretreatment process for the high-concentration waste gas in the hazardous waste industry, targeted treatment can be carried out through the liquid seal system according to the concentration of the waste gas, the concentration of the high-concentration waste gas is reduced, the concentration of the low-concentration waste gas is improved, the suitability of the waste gas entering an RTO system is improved, natural gas consumption of the RTO system is reduced, the energy cost is reduced, and meanwhile, the environment is protected. When a tempering accident occurs, flame returning can be effectively prevented, the safety of a front-end device area is guaranteed, secondary disasters are completely eradicated, the unique composite liquid sealing agent can dissolve complex waste gas components, good conditions are provided for follow-up treatment, and the environmental protection property of the whole treatment process is improved.

The invention discloses a city natural gas consumption prediction method based on an XGB-PSO-LSTM model, belongs to the technical field of energy prediction, and aims to solve the problem that a traditional statistical method such as time sequence analysis and regression analysis establishes a model based on historical data to predict future, and the prediction efficiency is high. The deep learning method has the advantages of processing the nonlinear relation of sequence data and long-term dependence, but the parameter adjustment is complicated and the adaptability is relatively weak.

The invention provides a compound hydrate inhibitor and a natural gas consumption prediction device and method, the compound hydrate inhibitor comprises a kinetic hydrate inhibitor, a thermodynamic hydrate inhibitor and 900-1000 parts of solvent water, the kinetic hydrate inhibitor comprises 5-20 parts by weight of polyvinylpyrrolidone, the thermodynamic hydrate inhibitor comprises 10-20 parts by weight of polyvinylpyrrolidone, and the solvent water comprises 10-20 parts by weight of a solvent. The thermodynamic hydrate inhibitor is prepared from 19 to 38 parts of monohydric alcohol compound and 15 to 20 parts of soluble chlorine salt. The hydrate inhibitor has a remarkable inhibition effect on a hydrate nucleation stage, after polyvinylpyrrolidone, methyl alcohol and sodium chloride are mixed, the inhibition effect of the hydrate can be synergistically improved, the compound hydrate inhibitor is applied to a natural gas consumption prediction device, and the natural gas consumption prediction efficiency is improved. Generation of natural gas hydrate in the pipeline conveying process of natural gas can be further simulated, and more accurate natural gas consumption prediction can be carried out on an untested formula or according to actual natural gas conveying conditions.

The invention relates to waste heat recovery equipment and a natural gas hydrogen-doped combustion system. The waste heat recovery equipment comprises a first heat exchanger, a second heat exchanger and a spray tower, the first heat exchanger is provided with a first heat absorption side and a first heat release side, an outlet of the first heat absorption side is communicated with a combustion-supporting gas inlet of the combustor, the second heat exchanger is provided with a second heat absorption side and a second heat release side, and an inlet of the second heat release side is connected with a high-temperature flue gas outlet of the combustor. The spray tower is provided with a cooling water inlet, a smoke inlet, a smoke outlet and a spray water outlet, the smoke inlet is communicated with the outlet of the second heat release side, the spray water outlet is communicated with the inlet of the second heat absorption side, and the outlet of the second heat absorption side is communicated with the inlet of the first heat release side. According to the waste heat recovery equipment, two-stage waste heat recovery of high-temperature flue gas is achieved, the waste heat recovery efficiency is remarkably improved, combustion-supporting gas can be heated, accordingly, other combustion efficiency is improved, natural gas consumption and carbon emission are reduced, and the requirements for energy conservation and carbon reduction in the industrial high-temperature combustion process are met.

The invention belongs to the technical field of natural gas peak regulation, particularly relates to a natural gas peak regulation method and system based on spatio-temporal information, and aims to solve the problem that a large-range and more comprehensive natural gas peak regulation mode is lacked in the prior art. The method comprises the following steps: acquiring a second index thermodynamic diagram and inputting the second index thermodynamic diagram into a first neural network model to obtain the natural gas consumption of a target area in a first statistical period as a first demand quantity; before the first statistical period starts, natural gas of the first demand quantity is conveyed to a central peak regulation system of the target area; obtaining a fourth index thermodynamic diagram, inputting the fourth index thermodynamic diagram into the second neural network model, and predicting the natural gas consumption of each sub-region of the target region in the first statistical period as a second demand; and before the first statistical period starts, the natural gas of each second demand quantity is conveyed to the corresponding secondary peak regulation system. According to the method, large-range and more comprehensive natural gas peak regulation is realized through a grading direct prediction mode.

The invention provides a method and a system for heating a carbon product kneading dry material by using waste heat of a roasting furnace, and belongs to the technical field of carbon. The method comprises the following steps: collecting mixed high-temperature hot air generated in a cooling stage of a roasting furnace after roasting a carbon product; and heating the carbon product kneading dry material to a set temperature by taking the mixed high-temperature hot air as a heat source. By using the waste heat generated in the cooling area of the roasting furnace as a heat source to heat the kneading dry material, the method not only can effectively improve the heat energy utilization rate of the roasting furnace and fully utilize the waste heat of the roasting furnace, but also can reduce the natural gas consumption of the carbon dry material in the heating kneading forming process.

Disclosed is a natural gas consumption prediction and analysis system for use in the energy sector. The system determines the necessary parameters and coefficients for predicting natural gas consumption using real-time natural gas consumption data, meteorological data, and client characteristics, and forms client clusters.

The utility model discloses a rubber pipeline setting oven assembly for realizing waste gas utilization, which comprises a first oven and a second oven, the first oven comprises a first oven body, a gum dipping component arranged in the first oven body, a first waste gas discharge port arranged in the first oven body, and a first heating component for heating the internal space of the first oven body; the second drying oven comprises a second drying oven body and a second heating assembly for heating the inner space of the second drying oven body, the second heating assembly comprises a burner with a gas inlet end and a flame jetting end, the second heating assembly is provided with a guide wall on one side of the flame jetting end of the burner, and a plurality of waste gas introduction holes are formed in the guide wall; and the waste gas introducing hole is connected with the first waste gas discharging hole through a first waste gas conveying pipeline. Heat generated by waste gas combustion is utilized, and the natural gas consumption of the second heating assembly can be properly reduced, so that the natural gas consumption is saved, and the cost is reduced.

The utility model discloses an after-treatment waste heat recovery system for preparing titanium dioxide products by a chlorination method, which comprises a hearth, and a flash evaporation dryer, a bag-type dust collector and an induced draft fan which are sequentially arranged along the flowing direction of flue gas, flue gas generated by combustion of the combustor and dilution air are mixed at the tail end of the hearth and then flow into the flash evaporation drying machine, a flue gas outlet of the induced draft fan is connected with a flue gas discharging pipe, a flue gas recirculation pipe is branched on the flue gas discharging pipe and connected with a dilution air inlet of the hearth, and an environment air inlet is formed in the air heater. An air outlet of the air heater is connected with an environment air inlet of the combustor through an air pipeline, the tail end of the smoke exhaust pipe is connected with a smoke inlet of the heat exchanger, and a heat exchange circulating water path is formed between the heat exchanger and the air heater. According to the utility model, the originally discharged hot flue gas is led to the hearth through the pipeline and is directly mixed with the flue gas generated by natural gas combustion, so that the waste heat recovery effect is good, and the natural gas consumption in the flash drying process is effectively reduced.

The invention discloses a natural gas consumption prediction method and device and a knowledge graph construction method and device. The method comprises the following steps: acquiring initial historical data of a target production enterprise in a plurality of sampling periods within a preset time period, and correcting the initial historical data of each sampling period to obtain corresponding corrected historical data; the corrected historical data comprises historical steel yield production data and corresponding historical natural gas consumption data; according to the corrected historical data of each sampling period, constructing a producer function corresponding to the target production enterprise; the producer function represents the natural gas consumption required for producing the steel product; and based on an output result of a pre-constructed steel yield prediction model of the target production enterprise, solving the producer function, and taking a solving result as a predicted value of the natural gas consumption of the target production enterprise. And the natural gas consumption required by steel product production of a production enterprise can be predicted more accurately.

The invention relates to the technical field of VOCs treatment, in particular to a VOCs treatment method, a VOCs treatment system and a coating plant. The VOCs processing method comprises the following steps: S1, establishing a model, and obtaining a relationship between VOCs inlet concentration and natural gas theoretical consumption through historical data training; s2, the actual consumption of the natural gas is adjusted according to the model, and the adjustment of the actual consumption of the natural gas according to the model comprises the steps that when the VOCs inlet concentration is smaller than 200 mg / m < 3 >, the supply of the natural gas is adjusted to be 30%-50% of a design value; when the inlet concentration is 200 mg / m < 3 >-600 mg / m < 3 >, the supply of the natural gas is maintained at a design value; and when the inlet concentration is larger than 600 mg / m < 3 >, the supply of the natural gas is adjusted to 10%-20% of the design value. The problem of natural gas energy waste caused by a traditional RTO treatment process is solved.

The invention relates to a natural gas consumption prediction and analysis system (A) designed to be used in the energy sector. It determines the necessary parameters and coefficients for predicting natural gas consumption using real-time natural gas consumption data, meteorological data, and client characteristics, and forms client clusters.

The invention provides an aluminum alloy homogenizing furnace abnormal state detection method based on data driving, which comprises the following steps of: fitting heating section data and natural gas consumption data of an aluminum alloy homogenizing furnace in a normal state by using a time domain response curve of a second-order control system under a step signal in advance to obtain a corresponding standard control curve; acquiring natural gas consumption data and electric energy consumption data of the to-be-detected aluminum alloy homogenizing furnace in each production process; calculating an accumulative error between the heating section data and a preset heating electric energy standard control curve through a fixed sliding window, calculating an accumulative error between the natural gas consumption data and a preset natural gas standard control curve, and preliminarily judging that the data is abnormal when the accumulative error corresponds to a corresponding accumulative error threshold value; and re-checking the abnormal data by adopting an isolated forest anomaly detection model.

The invention discloses a natural gas consumption and generating capacity prediction system, which comprises a data acquisition unit used for acquiring a natural gas calorific value, an environment temperature, a generating curve and a heat supply amount; the data preprocessing unit is used for denoising the time sequence data in the data acquisition unit by adopting wavelet transform; the multi-modal data fusion modeling unit is used for constructing a reference model based on a thermodynamic equation; the dynamic adjusting unit adopts an FTRL-Proximal online optimizer to update model parameters in real time, and meanwhile, failure features are automatically eliminated through L1 regularization; the hybrid prediction unit inputs the natural gas heat value, the environment temperature, the power generation curve and the heat supply quantity processed by the data preprocessing unit into a thermodynamic equation to construct a reference model, and predicts daily power generation capacity and natural gas usage amount in real time; and the man-machine interaction unit is used for screening the automatically generated next-day power generation curve and marking an uncertain time period, a user adjusts key nodes, and a compliance curve is re-fitted through constraint optimization.

The utility model belongs to the field of lithium battery anode and cathode material production line waste gas treatment and energy conservation, and provides a lithium battery anode and cathode material production line waste gas treatment and energy conservation device which comprises a dust removal device, an RTO heat storage incineration system and a waste heat recovery system. And the heat of the incinerated high-temperature waste gas is recovered through a waste heat recovery device. According to the utility model, particulate matters in the flue gas are removed through the dust removal device, so that the concentration of the particulate matters in the flue gas can be greatly reduced, and the particulate matters can be discharged up to the standard while a guarantee is provided for normal operation of a follow-up RTO (Regenerative Thermal Oxidation) system; vOCs in the flue gas are effectively treated and removed through the RTO system, the removal efficiency can reach 99% or above, the concentration of the VOCs and the concentration of odor in the flue gas can be effectively reduced, meanwhile, the heat efficiency of the RTO system is greatly improved compared with that of a TO furnace in an original system, and natural gas consumption can be effectively reduced.

The invention discloses a dynamic emission target formulating method and device based on a natural gas engine, and relates to the technical field of engines, and the method comprises the following steps: obtaining the total equivalent aging time based on a constructed actual aging condition equivalent model corresponding to a three-way catalyst; based on the temperature difference between the processing outlets and the processing inlets of the front oxygen concentration sensor and the rear oxygen concentration sensor of the target engine, an emission target correction value is obtained; obtaining target conversion efficiency based on the actual aging condition equivalent model; based on the target conversion efficiency and the emission standard limit value, a comparison table of the circulation aging time and the original machine emission target value is obtained; and obtaining an original engine emission target value of the target engine based on a comparison table of the total equivalent aging time and the cyclic aging time with the original engine emission target value. According to the post-treatment actual aging condition of the natural gas engine, a reasonable emission target is formulated, and it is ensured that the optimal natural gas consumption level is obtained on the premise that emission is met.

The invention relates to the technical field of oil and gas field ground engineering water jacket heating furnace cleaning replacement, and aims to solve the technical problems that when an existing water jacket heating furnace is replaced by an air source heat pump process, an existing oil pipeline needs to be opened, and the water jacket heating furnace always needs to be in a heat preservation state; in order to solve the problem that an air source heat pump needs to be immediately switched to a water jacket heating furnace system to work once the air source heat pump breaks down, the invention provides the air source heat pump and built water jacket heating furnace coupling heating system and process. The system comprises an air source heat pump, a built water jacket heating furnace, a hot water circulating pump, an air source heat pump refrigerant and water heat exchanger and a control system. The process utilizes the system to heat crude oil; according to the system and the method, the risk of fire connection during transformation of the air source heat pump and the built water jacket heating furnace is effectively solved, meanwhile, the built water jacket heating furnace and the air source heat pump are switched at any time through high-temperature water circulation, additional natural gas consumption is not increased, and the project investment can be reduced.

The application discloses a kind of electricity and natural gas integrated energy distribution network system planning method, comprising the following specific steps: step 1: input the network of electricity and natural gas integrated energy distribution network system to be planned and the parameters of various types of facilities to be planned;Step 2: using historical data set to construct renewable energy and load scene, clustering is carried out using K-means algorithm;Step 3: according to the network and facility parameters provided in step 1 and the scene clustering result obtained in step 2, construct mixed hydrogen natural gas operation model, including electric power to gas facilities, mixed gas component, and natural gas consumption is modeled;Step 4: construct the double-layer planning model of wind turbine and soft switch investment construction planning;Step 5: using convex approximation and relaxation technique, the electricity and natural gas integrated energy distribution network system planning method disclosed by the application has the effect of obtaining the optimal planning strategy by solving through an iterative algorithm based on decomposition and reconstruction.

The utility model discloses a blending combustion system for coupling natural gas with biomass gas in a furnace kiln, which belongs to the technical field of biomass energy utilization and comprises a filtering device, a pressure regulating device, a purifying device, a first pressure stabilizing device, a gas mixing device, a second pressure stabilizing device, a flame arrester, the furnace kiln and an induced draft fan. According to the system, the natural gas and the biomass gas are coupled, mixed and combusted, the heat value defect of the biomass gas is overcome through the high heat value characteristic of the natural gas, the combustion temperature and heat efficiency of the kiln are guaranteed, the consumption of the natural gas can be reduced by mixing the biomass gas, the energy utilization efficiency and the environmental protection performance of the kiln are improved, and the fuel cost is reduced by more than 30%.

The present disclosure provides a method for intelligent metering of natural gas, including obtaining a metering value of the natural gas used by a user in a time period from a metering device via a network, the metering device being located at a gas supply terminal of a transmission pipe network, and determining a consumption amount of natural gas based on the metering value and a pricing scheme. The pricing scheme includes a volume-based pricing scheme and an energy-based pricing scheme. Volume unit prices of the natural gas in different component types are different, and are determined based on an adjustment model.

Implementations of a method of calculating a county-level consumption of natural gas may include providing county-level natural gas production data for a plurality of counties to a database from a data repository; removing from an analysis, using a processor, all areas of a first county of the plurality of counties that do not include a natural gas utility; and using the processor, the database, and the county-level natural gas production data, executing a regression with at least two geographical characteristics of the first county to determine a natural gas consumption within the first county. The method may also include using the processor, repeating for each county of the plurality of counties to determine the natural gas consumption for each of the plurality of counties.

The invention discloses an oxygen-enriched combustion heat treatment process. Comprising the following steps that S1, ignition is conducted, specifically, a PLC system sends an operation signal to a combustion controller BCU, the combustion controller BCU opens a gas electromagnetic valve and an air valve and switches on an ignition transformer power source, and ignition is started; and S2, when ignition succeeds and the heating furnace is in a high-temperature period, combustion enters an oxygen-enriched combustion mode, and the temperature in the high-temperature period is larger than or equal to 850 DEG C. The oxygen-enriched combustion mode in the high-temperature period is adopted and matched with the molecular sieve and the compressed air injection mode, the natural gas consumption is reduced, the higher gas energy saving amount is achieved, the peroxide coefficient is low, and therefore the production cost is reduced, and the product quality is improved.

According to the combined cycle unit air inlet heating system and method for coupling clean energy with the multi-stage compression heat pump, geothermal energy, flue gas waste heat and solar energy are sequentially extracted through the three-stage compression heat pump, various clean energy is efficiently coupled, and the utilization rate of the clean energy is increased; the influence of solar energy intermittency and instability on the system is overcome, and the solar energy utilization rate is improved; the circulating heat efficiency of the system is improved, and natural gas consumption and pollutant emission are reduced; the COP of the heat pump is improved, the power consumption of the compressor is reduced, and the energy conversion efficiency is improved; a natural gas performance heater and an original high-grade steam heat source are replaced with the multiple clean energy coupled three-stage compression heat pump, the heat consumption rate of the unit is reduced, the operation cost and the emission amount of pollutants such as CO2 are reduced, the double-carbon and clean energy supply policy is responded, and the economic and environment-friendly double benefits are obtained.

The utility model relates to a kind of porcelain combustion kiln, including the furnace body with combustion chamber being arranged inside, furnace body front is equipped with furnace door, the furnace wall of furnace body two sides is equipped with several burner mounting hole, each burner mounting hole is equipped with burner;The burner includes fixed base, ignition device, gas pipe, hydrogen-oxygen gas pipe and combustion air duct, the gas pipe and hydrogen-oxygen gas pipe are located in combustion air duct inside, combustion air duct passes through burner mounting hole and its front end is provided with flame outlet, hydrogen-oxygen gas pipe front end is connected with gas pipeline middle section by jet mixer, gas pipe front end is closed and the periphery is distributed with gas hole, and gas pipe front end extends to flame outlet place.The utility model porcelain combustion kiln design is reasonable, structure is novel, uses hydrogen-oxygen gas and natural gas as mixed fuel, reduces natural gas consumption, since hydrogen-oxygen gas combustion only produces water vapor, no harmful emissions, meet clean energy trend, reduce input cost.

This invention belongs to the field of recycled aluminum alloy material preparation technology, and discloses a method for preparing high-performance low-carbon 6061 aluminum alloy using recycled aluminum purification treatment, including: waste aluminum classification pretreatment, melt solvent purification, multi-stage melt purification, alloy formulation and casting, and strengthening heat treatment. This invention achieves precise control and green manufacturing throughout the entire process from waste aluminum to high-end aluminum alloy. This invention can stably control the Fe content of recycled aluminum melt at 0.15~0.25%, solving the problem of performance degradation caused by iron impurities; the composite slag remover and argon degassing work synergistically, achieving an inclusion removal rate ≥71%, hydrogen content ≤0.15ml / 100gAl, and melt quality fully comparable to primary electrolytic aluminum. Simultaneously, the entire process parameters are optimized, achieving a recycled aluminum recovery rate ≥91%, reducing aluminum ash production by more than 55%, and reducing natural gas consumption to 72m³. 3 This invention is applicable to the green and low-carbon manufacturing of high-performance wrought aluminum alloys; it can be used for high-end structural components in aerospace, automotive lightweighting, rail transportation, and new energy equipment.

The utility model relates to a centralized dissolving furnace energy-saving transformation system, which comprises a fuel gas dissolving furnace, a fuel gas pipeline, an air pipeline, a flue heat exchanger and a fuel gas meter, the fuel gas dissolving furnace comprises a combustion nozzle, one end of the fuel gas pipeline is connected with the combustion nozzle, the fuel gas meter is arranged on the fuel gas pipeline, and the air pipeline is connected with the flue heat exchanger. One end of the air pipeline is connected with the combustion nozzle through the flue heat exchanger, and the flue heat exchanger is arranged above the combustion nozzle. According to the energy-saving transformation system of the centralized dissolving furnace, the combustion-supporting air quantity heat exchanger is additionally arranged between the air feeder pipeline and the combustion nozzle of the original centralized dissolving furnace, combustion-supporting air is firstly sent to the customized flue heat exchanger through the combustion-supporting fan, and the combustion-supporting air is sent to the combustion nozzle after being heated by the flue heat exchanger; the air inlet temperature and the combustion heat value are effectively increased, the functions of reducing the natural gas consumption of the concentrated dissolving furnace and increasing the temperature rising speed of the concentrated dissolving furnace are achieved, and meanwhile the environment temperature is reduced.

The invention relates to the technical field of aluminum oxide production, and provides a red mud settling process for aluminum oxide production, which comprises the following steps of: 1, taking evaporation wastewater with the temperature of 55-62 DEG C generated by an aluminum oxide evaporation system as a main washing hot water source of a red mud settling tank to replace traditional dam return water and production circulating water; when evaporation water is insufficient, supplementing evaporation disqualified condensate water with the temperature of 85-90 DEG C, mixing the evaporation disqualified condensate water and the evaporation disqualified condensate water to form mixed washing water, and controlling the temperature of the mixed washing water to be 60-75 DEG C; secondly, primary washing underflow generated in aluminum oxide production is conveyed to a slag removal box through an underflow pump, scab blocks and impurities are filtered and removed, and follow-up equipment is prevented from being blocked; according to the process, heating energy consumption is reduced through evaporation, and natural gas consumption is reduced; grading and sedimentation are optimized, the sedimentation speed is increased, and the hydrolysis loss is reduced; accurate temperature control and high-pressure washing alkali extraction recovery rate are achieved, and the water utilization rate is increased through washing liquor recycling; and multiple processes are also adapted.

The application discloses an ammonia oxidation reaction waste gas treatment method and system, and the treatment system comprises a water absorption tower, a deamination tower, a direct combustion furnace, a waste heat steam boiler, a preheating heat exchanger, a denitration reactor and a tail gas heat exchanger. The treatment method comprises the following steps: absorbing ammonia gas in waste gas through the water absorption tower, reducing the ammonia concentration of waste gas entering the direct combustion furnace and reducing the dilution air consumption of the direct combustion furnace; absorbing liquid enters the deamination tower to desorb ammonia gas, and the ammonia gas is injected into the direct combustion furnace as fuel gas; high-temperature waste gas firstly passes through the waste heat steam boiler to produce by-product steam, and then enters the preheating heat exchanger to preheat the inlet waste gas of the direct combustion furnace; the waste gas after heat exchange enters the denitration reactor to carry out a denitration reaction; the treated waste gas passes through the tail gas heat exchanger and the circulating water heat exchanger, and then enters the water spray tower to remove a small amount of smoke dust and is discharged; the application effectively reduces the dilution combustion-supporting air supplement and the natural gas consumption, can reduce the treatment waste gas amount of the direct combustion furnace and the denitration reactor, and effectively reduces the equipment investment and the operation energy consumption.

The invention discloses a spatial-temporal distribution data visualization-oriented agricultural planting family carbon emission calculation system, and relates to the field of carbon emission calculation. The objective of the invention is to solve the problem of low accuracy of agricultural planting family carbon emission calculation in the existing carbon emission calculation method. The method comprises the steps that the homestead position, the cultivated land position, the household electricity consumption, the water consumption, the natural gas consumption, the household garbage output, the travel information and the planting process data in a research area are obtained; acquiring the total carbon emission in the living field by using the household electricity consumption, water consumption, natural gas consumption, household garbage output and travel information; based on the planting process data, obtaining the total carbon emission generated by the agricultural planting family; and drawing a life field carbon emission analysis chart and an agricultural field carbon emission analysis chart according to the homestead position, the cultivated land position, the total carbon emission in the life field and the total carbon emission in the agricultural field, and then judging whether abnormal carbon emission data exist or not. The method is used for calculating the carbon emission of the agricultural planting family.

The invention relates to the technical field of fuel gas utilization, in particular to a fuel gas comprehensive utilization system and method.The system comprises a molecular sieve vent gas recovery mechanism, a liquid nitrogen wash fuel gas recovery mechanism and an ice maker vent gas recovery mechanism, and the liquid nitrogen wash fuel gas recovery mechanism comprises a fuel gas buffer tank, a CO adsorption device and a fuel gas header pipe; the fuel gas buffer tank is communicated with a fuel gas header pipe; the molecular sieve vent gas recovery mechanism comprises a molecular sieve vent gas pipeline, a cold torch header pipe and an accident torch header pipe which are communicated in sequence, the molecular sieve vent gas pipeline is further communicated with the fuel gas buffer tank, and the accident torch header pipe is communicated with an accident torch; the ice maker vent gas recovery mechanism comprises a gas ammonia recovery device and an ammonia torch header pipe which are communicated in sequence, the gas ammonia recovery device is further communicated with the fuel gas header pipe, and the ammonia torch header pipe is communicated with the ammonia torch. The invention solves the problems of waste of molecular sieve pressure relief air, large natural gas consumption of torch incandescent lamps, low fuel gas utilization efficiency, high CO preparation cost, complex process and the like.