A confined space hydrogen sulfide intelligent elimination system and method

Abstract

The present invention discloses a system and method for intelligent elimination of hydrogen sulfide in a confined space. The system includes a hydrogen sulfide monitoring subsystem, a control subsystem, and a spray subsystem; the hydrogen sulfide monitoring subsystem is used to monitor the concentration of hydrogen sulfide in the confined space and output the monitoring result; the control subsystem is used to receive the monitoring result and start and stop the spray subsystem based on the monitoring result; the spray subsystem is used to spray a hydrogen sulfide eliminater based on the control of the control subsystem to complete the intelligent elimination of hydrogen sulfide in the confined space. The present invention adopts a hydrogen sulfide efficient eliminater and an intelligent monitoring spray system, and installs a fixed / mobile hydrogen sulfide monitoring spray system according to the characteristics of different confined space operations, so as to realize the intelligent and efficient elimination of hydrogen sulfide in various confined spaces and ensure that the workers and equipment in the confined space are protected from the harm of hydrogen sulfide.

Description

Technical Field

[0001] This invention belongs to the field of toxic and harmful gas elimination technology in confined spaces, specifically relating to an intelligent hydrogen sulfide elimination system and method in confined spaces. Background Art

[0002] Because confined spaces are enclosed or semi-enclosed, with restricted entrances and exits and poor ventilation, the life activities of microorganisms release large amounts of hydrogen sulfide gas, which accumulates within the confined space, leading to frequent hydrogen sulfide poisoning accidents among workers. Hydrogen sulfide is a toxic, flammable, acidic gas; even a concentration of one part per ten thousand can cause severe poisoning. Its molecular mass is larger than air, and it is mainly distributed at the bottom of confined spaces, making poisoning accidents more likely when personnel enter the bottom of these spaces. Furthermore, since hydrogen sulfide in confined spaces primarily originates from microbial metabolism, and the high temperatures of summer provide better living conditions for these microorganisms, increasing their biological activity and causing them to release large amounts of hydrogen sulfide gas, coupled with reduced solubility of hydrogen sulfide in water, this gas is released into the confined space. Therefore, summer is a period of high incidence of hydrogen sulfide accidents in confined spaces. Typical confined spaces prone to hydrogen sulfide poisoning accidents include sewage treatment facilities such as collection wells, primary sedimentation tanks, and equalization tanks in wastewater treatment plants; pickling tanks in pickling plants; pulping tanks in paper mills; dyeing tanks in garment factories; fermentation tanks involving fermentation operations; and sludge removal work on sewage wells in various industries. Currently, the elimination of hydrogen sulfide in confined spaces mainly relies on forced and natural ventilation, which is difficult to achieve efficient and deep elimination of hydrogen sulfide, and the elimination effect is difficult to detect. Summary of the Invention

[0003] This invention aims to address the shortcomings of existing technologies by proposing an intelligent hydrogen sulfide elimination system and method for confined spaces. This system ensures that hydrogen sulfide levels in confined spaces do not exceed limits, improves the working environment in confined spaces, reduces the concentration of odors in the air, and most importantly, guarantees the safety of personnel working in confined spaces.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A confined space intelligent hydrogen sulfide removal system includes a hydrogen sulfide monitoring subsystem, a control subsystem, and a spraying subsystem;

[0006] The hydrogen sulfide monitoring subsystem is used to monitor the concentration of hydrogen sulfide in a confined space and output the monitoring results.

[0007] The control subsystem is used to receive the monitoring results and start or stop the sprinkler subsystem based on the monitoring results;

[0008] The spraying subsystem is used to spray hydrogen sulfide eliminator based on the control of the control subsystem, thereby completing the intelligent elimination of hydrogen sulfide in a confined space.

[0009] Preferably, the hydrogen sulfide monitoring subsystem includes a hydrogen sulfide concentration monitoring module and an analysis module;

[0010] The hydrogen sulfide concentration monitoring module is used to monitor whether the hydrogen sulfide concentration exceeds a preset concentration threshold based on the hydrogen sulfide concentration detector. If so, it outputs an over-limit signal.

[0011] The analysis module is used to acquire real-time detection data from the hydrogen sulfide concentration detector, perform data analysis, and monitor the operation of the hydrogen sulfide concentration detector.

[0012] Preferably, the analysis module includes a spatiotemporal feature acquisition unit, a model building unit, and a distribution map construction unit;

[0013] The spatiotemporal feature acquisition unit is used to preprocess the detection data and acquire the spatiotemporal features of the detection data based on the evolutionary attention temporal graph convolutional network.

[0014] The model building unit is used to obtain the hydrogen sulfide concentration distribution at each location node in a finite space based on the spatiotemporal characteristics, and to construct a diffusion distribution model of hydrogen sulfide gas based on the hydrogen sulfide concentration distribution.

[0015] The distribution map construction unit is used to obtain a hydrogen sulfide concentration distribution map based on the diffusion distribution model, and to visualize the concentration distribution map to complete the analysis of the distribution characteristics of hydrogen sulfide gas in a confined space.

[0016] Preferably, the control subsystem includes a signal receiving module and a PLC control unit;

[0017] The signal receiving module is used to receive the over-limit signal;

[0018] The PLC control unit is used to start and stop the spray subsystem based on the over-limit signal.

[0019] Preferably, the spraying subsystem includes a hydrogen sulfide eliminator storage unit and a spraying unit;

[0020] The hydrogen sulfide eliminator storage unit is used to store the prepared hydrogen sulfide eliminator;

[0021] The spraying unit is used to spray the hydrogen sulfide eliminator under the control of the PLC control unit to eliminate hydrogen sulfide in a confined space.

[0022] Preferably, the hydrogen sulfide eliminator is prepared using a complexed iron catalyst, a bio-inhibitor, and an alkali.

[0023] Preferably, the spraying unit uses a 30° ultrasonic nozzle, and when the air pressure is 0.5MPa and the hydraulic pressure is 0.25MPa, the nozzle's air consumption is 0.3m³. 3 The liquid consumption rate is 3L / min, and the droplet size of the spray is 50-60μm.

[0024] This invention also provides a method for intelligent removal of hydrogen sulfide in a confined space, based on an intelligent hydrogen sulfide removal system in a confined space, comprising the following steps:

[0025] Monitor the concentration of hydrogen sulfide in a confined space and obtain the monitoring results;

[0026] Based on the monitoring results, a hydrogen sulfide eliminator is sprayed to achieve intelligent elimination of hydrogen sulfide within the confined space.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] (1) Intelligent elimination: The hydrogen sulfide monitoring subsystem and the spraying subsystem are connected. When the monitoring subsystem sends a signal that the hydrogen sulfide concentration in the confined space exceeds the limit, the ultrasonic spraying system is automatically started. When the monitored hydrogen sulfide concentration is lower than the critical value, the signal that the hydrogen sulfide concentration exceeds the limit disappears and the spraying subsystem stops automatically, thus playing an intelligent elimination role for hydrogen sulfide in the confined space.

[0029] (2) Flexible elimination: The hydrogen sulfide monitoring subsystem and the spray subsystem can be divided into fixed and mobile types, which can meet the long-term hydrogen sulfide elimination in a confined space as well as the temporary hydrogen sulfide elimination in a confined space.

[0030] (3) Continuous and efficient elimination: The hydrogen sulfide eliminator prepared by complexed iron catalyst can simultaneously eliminate hydrogen sulfide and regenerate the catalyst in a confined space, thus achieving the effect of continuously and efficiently eliminating hydrogen sulfide in a confined space.

[0031] (4) Comprehensive Elimination: First, the hydrogen sulfide eliminator is sprayed into the confined space, eliminating hydrogen sulfide gas in the air; second, the addition of biological inhibitors to the hydrogen sulfide eliminator inhibits the growth of hydrogen sulfide-producing microorganisms in the hydrogen sulfide source pool, thereby reducing hydrogen sulfide production at the source; third, the hydrogen sulfide eliminator is sprayed into the hydrogen sulfide source pool, eliminating dissolved hydrogen sulfide gas in the pool and preventing it from escaping into the confined space. Therefore, this method comprehensively eliminates hydrogen sulfide in the confined space from three aspects: hydrogen sulfide production, escaping, and distribution in the air.

[0032] (5) Rapid elimination: First, adjust the pH value of the hydrogen sulfide eliminator solution to be in the range of 8.5 to 9. The solution maintains a certain alkalinity, which can quickly absorb hydrogen sulfide and convert it into sulfide ions, thereby accelerating the reaction rate (1) and improving the overall reaction efficiency. Second, the spacing of the nozzles can be adjusted or the spray flow rate can be increased according to actual requirements to shorten the hydrogen sulfide elimination time in the limited space, thereby achieving the purpose of rapid elimination. Attached Figure Description

[0033] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the confined space fixed hydrogen sulfide intelligent elimination system according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the confined space mobile intelligent hydrogen sulfide elimination system according to an embodiment of the present invention;

[0036] Attached diagram descriptions: 1 is the sewage inlet, 2 is the sewage lift pump, 3 is the screen, 4 is the sewage, 5 is the hydrogen sulfide eliminator, 6 is the hydrogen sulfide monitoring subsystem, 7 is the spraying subsystem, 8 is the control subsystem, 9 is the nozzle, and 10 is the sludge in the pickling tank. Detailed Implementation

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figure 1As shown, a confined space hydrogen sulfide intelligent elimination system includes a hydrogen sulfide monitoring subsystem 6, a control subsystem 8, and a spraying subsystem 7. The hydrogen sulfide monitoring subsystem 6 and the spraying subsystem 7 are divided into fixed and mobile types: when the confined space contains a hydrogen sulfide source pool during daily operation (such as a sewage treatment plant collection well, primary sedimentation tank, equalization tank, etc.), the spraying subsystem 7 is fixedly installed on the upper part of the hydrogen sulfide source pool and connected to the hydrogen sulfide monitoring subsystem 6 at these locations; when hydrogen sulfide gas that is harmful to workers is generated in the confined space at a certain time (such as sludge removal operations in confined spaces such as pickling tanks and sludge tanks), the spraying subsystem 7 is temporarily erected on the upper part of the hydrogen sulfide source pool, and a hydrogen sulfide concentration detector is suspended downward from the spraying system, so that the two are interconnected.

[0041] Hydrogen sulfide monitoring subsystem 6 is used to monitor the concentration of hydrogen sulfide in a confined space and output the monitoring results;

[0042] A further implementation includes a hydrogen sulfide monitoring subsystem 6, comprising a hydrogen sulfide concentration monitoring module and an analysis module.

[0043] The hydrogen sulfide concentration monitoring module is used to monitor whether the hydrogen sulfide concentration exceeds a preset concentration threshold based on a hydrogen sulfide concentration detector. If so, it outputs an over-limit signal; the preset concentration threshold is 10 mg / m³. 3 .

[0044] The analysis module is used to acquire real-time detection data from the hydrogen sulfide concentration detector, perform data analysis, and monitor the working status of the hydrogen sulfide concentration detector.

[0045] A further implementation method is that the analysis module includes a spatiotemporal feature acquisition unit, a model building unit, and a distribution map building unit;

[0046] The spatiotemporal feature acquisition unit is used to preprocess the detection data and acquires the spatiotemporal features of the detection data based on the evolutionary attention temporal graph convolutional network.

[0047] The model building unit is used to obtain the hydrogen sulfide concentration distribution of each location node in a limited space based on spatiotemporal characteristics (by installing multiple concentration detectors, the network nodes formed by the concentration detectors serve as location nodes in the limited space), and to construct a diffusion distribution model of hydrogen sulfide gas based on the hydrogen sulfide concentration distribution.

[0048] The distribution map construction unit is used to obtain a hydrogen sulfide concentration distribution map based on the diffusion distribution model, and visualize the concentration distribution map to complete the analysis of the distribution characteristics of hydrogen sulfide gas in a limited space.

[0049] Specifically, based on the initial input attention layer, different degrees of attention are given to the feature matrix of the sliding sub-window. The CRS algorithm is used to update the planned attention weights. A graph convolutional neural network is used to learn the spatial features of the detection data obtained by the hydrogen sulfide concentration detector (the acquisition of spatial features requires the cooperation of multiple hydrogen sulfide concentration detectors, which can be installed at different locations in a limited space to analyze the spatial distribution characteristics of hydrogen sulfide gas). A gated recurrent unit is used to learn the characteristics of gas concentration changes over time, and the loss value between the predicted value and the true value is calculated to obtain a new attention layer.

[0050] The method for obtaining the hydrogen sulfide concentration distribution map is as follows:

[0051] Based on the diffusion distribution model, the predicted value of hydrogen sulfide gas concentration is obtained, and normalization is performed based on the maximum and minimum values ​​of the predicted value.

[0052] Each node in the finite space is used as a grid node;

[0053] Calculate the displacement of the predicted point relative to the center point of the grid cell at time t;

[0054] Calculate the weight value for each grid cell based on the displacement;

[0055] The average concentration distribution of the grid cells is calculated based on the weight values ​​and the normalized predicted values.

[0056] Based on the average concentration distribution of the grid cells, a hydrogen sulfide concentration distribution map is constructed.

[0057] Users can observe the generation and diffusion of hydrogen sulfide in a confined space in real time using a visualized hydrogen sulfide concentration distribution map.

[0058] Control subsystem 8 is used to receive monitoring results and start / stop sprinkler subsystem 7 based on the monitoring results;

[0059] A further implementation includes a control subsystem 8, which includes a signal receiving module and a PLC control unit.

[0060] The signal receiving module is used to receive out-of-limit signals;

[0061] The PLC control unit is used to start and stop the sprinkler subsystem 7 based on over-limit signals.

[0062] The spraying subsystem 7 is used to spray hydrogen sulfide eliminator 5 based on the control subsystem 8, thereby completing the intelligent elimination of hydrogen sulfide in a confined space.

[0063] A further embodiment is that the spraying subsystem 7 includes a hydrogen sulfide eliminator storage unit and a spraying unit.

[0064] A hydrogen sulfide eliminator storage unit is used to store the prepared hydrogen sulfide eliminator 5; in a further embodiment, the hydrogen sulfide eliminator 5 is prepared using a complexed iron catalyst, a biological inhibitor, and an alkali.

[0065] The mechanism for preparing hydrogen sulfide eliminator 5 using complexed iron catalysts is as follows:

[0066] Hydrogen sulfide ionizes when dissolved in a liquid:

[0067] H2S→HS — +H + (1)

[0068] The ferric ions in the complexed iron ions oxidize the hydrosulfide ions:

[0069] HS — +2Fe 3+ →2Fe 2+ +H + +S (2)

[0070] Ferrous ions are oxidized into ferric ions in the air:

[0071] 1 / 2O2 + H2O + 2Fe 2+ →2OH — +2Fe 3+ (3)

[0072] Therefore, when the hydrogen sulfide eliminator 5 prepared by the complexed iron catalyst is sprayed into a confined space, the above reactions (1) to (3) can be carried out in a continuous cycle, and the complexing agent contained in the complexed iron catalyst can maintain the stability of iron ions, thereby achieving continuous and efficient elimination of hydrogen sulfide in a confined space.

[0073] The role of the bio-inhibitor is that the droplets generated by the spray subsystem 7 fall into the hydrogen sulfide source pool. The bio-inhibitor contained therein can inhibit the growth of hydrogen sulfide-producing microorganisms in the hydrogen sulfide source pool, thereby reducing the production of hydrogen sulfide from the source. At the same time, in order to prevent the development of drug resistance in hydrogen sulfide-producing microorganisms, the bio-inhibitor used needs to be replaced regularly.

[0074] Sodium hydroxide is used as the alkali agent, and the pH value of the solution is adjusted to be in the range of 8.5 to 9. According to the principle of chemical equilibrium, the solution can quickly absorb hydrogen sulfide and convert it into sulfide ions by maintaining a certain alkalinity, thereby accelerating the reaction rate (1) and improving the overall reaction efficiency, so as to achieve the rapid elimination of hydrogen sulfide in a limited space.

[0075] The spraying unit, controlled by a PLC control unit, sprays hydrogen sulfide eliminator 5 to eliminate hydrogen sulfide in a confined space.

[0076] Based on the monitored hydrogen sulfide elimination time, the nozzle spacing can be adjusted to increase the number of nozzles or the spray flow rate to shorten the hydrogen sulfide elimination time in a confined space, thereby achieving rapid elimination.

[0077] A further embodiment involves using a 30° ultrasonic nozzle in the spraying unit. When the air pressure is 0.5 MPa and the hydraulic pressure is 0.25 MPa, the nozzle's air consumption is 0.3 m³ / s. 3 The liquid consumption rate is 3L / min, and the droplet size of the spray is 50-60μm.

[0078] Example 2

[0079] 1) Installation of the stationary hydrogen sulfide monitoring subsystem 6 and the spray subsystem 7: in a confined space ( Figure 1 Wastewater treatment plant collection well: A hydrogen sulfide monitoring subsystem 6 is installed in the wastewater inlet 1, wastewater lift pump 2, screen 3, and wastewater 4. It is controlled by subsystem 8 and connected to the spray subsystem 7.

[0080] 2) Preparation of hydrogen sulfide eliminator 5: Hydrogen sulfide eliminator 5 was prepared by using a complexed iron catalyst, a biological inhibitor and an alkaline agent;

[0081] 3) Operation of the intelligent hydrogen sulfide elimination system in confined spaces: When the hydrogen sulfide concentration in the collection well exceeds the limit, the hydrogen sulfide monitoring subsystem 6 issues a signal indicating that the hydrogen sulfide concentration has exceeded the limit. Figure 2 (A schematic diagram of a hydrogen sulfide detector setup is shown). Control subsystem 8 activates ultrasonic spray subsystem 7, which then sprays hydrogen sulfide eliminator 5 into the collection well through nozzle 9. When the hydrogen sulfide concentration measured by hydrogen sulfide monitoring subsystem 6 is below the critical value of 10 mg / m³... 3 When the hydrogen sulfide monitoring subsystem 6 detects the disappearance of the hydrogen sulfide concentration exceeding the limit signal, the control subsystem 8 shuts down the spray subsystem 7.

[0082] Example 3

[0083] 1) Installation of the mobile hydrogen sulfide monitoring subsystem 6 and the spray subsystem 7: in a confined space ( Figure 2 Pickling tank: 10 is the sludge in the pickling tank. A hydrogen sulfide monitoring subsystem 6 is suspended in the tank, and a spraying subsystem 7 is installed on the edge of the pickling tank. The hydrogen sulfide monitoring subsystem 6 and the spraying subsystem 7 are connected via a control subsystem 8. Figure 2 (A schematic diagram of a hydrogen sulfide detector being suspended)

[0084] 2) Preparation of hydrogen sulfide eliminator 5: Hydrogen sulfide eliminator 5 was prepared by using a complexed iron catalyst, a biological inhibitor and an alkaline agent;

[0085] 3) Operation of the intelligent hydrogen sulfide elimination system in confined spaces: When the hydrogen sulfide concentration in the pickling tank exceeds the limit, the hydrogen sulfide monitoring subsystem 6 sends a signal indicating that the hydrogen sulfide concentration has exceeded the limit. The control subsystem 8 then activates the ultrasonic spraying subsystem 7, which sprays the hydrogen sulfide eliminator 5 into the pickling tank through nozzles 9. When the hydrogen sulfide concentration measured by the hydrogen sulfide monitoring subsystem 6 is lower than the critical value of 10 mg / m³, the system operates as follows: 3 When the hydrogen sulfide monitoring subsystem 6 detects the disappearance of the hydrogen sulfide concentration exceeding the limit signal, the control subsystem 8 shuts down the spray subsystem 7.

[0086] 4) Dismantle the mobile hydrogen sulfide monitoring subsystem 6 and the spraying subsystem 7, and carry out dredging operations on the pickling tank.

[0087] Example 4

[0088] This invention also provides a method for intelligent removal of hydrogen sulfide in a confined space, based on an intelligent hydrogen sulfide removal system in a confined space, comprising the following steps:

[0089] Monitor the concentration of hydrogen sulfide in a confined space and obtain the monitoring results;

[0090] Based on the monitoring results, a hydrogen sulfide eliminator was sprayed to achieve intelligent elimination of hydrogen sulfide in the confined space.

[0091] Based on the hydrogen sulfide concentration detector, monitor whether the hydrogen sulfide concentration exceeds the preset concentration threshold. If so, output an over-limit signal.

[0092] The system acquires real-time detection data from the hydrogen sulfide concentration detector, performs data analysis, and monitors the operation of the hydrogen sulfide concentration detector.

[0093] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A confined space hydrogen sulfide intelligent elimination system, characterized in that: Including hydrogen sulfide monitoring subsystem, control subsystem and spray subsystem; The hydrogen sulfide monitoring subsystem is used to monitor the concentration of hydrogen sulfide in a limited space and output the monitoring results; the hydrogen sulfide monitoring subsystem includes a hydrogen sulfide concentration monitoring module and an analysis module; The hydrogen sulfide concentration monitoring module is used to monitor whether the hydrogen sulfide concentration exceeds a preset concentration threshold based on a hydrogen sulfide concentration detector, and if so, output an over-limit signal; The analysis module is used to obtain real-time detection data of the hydrogen sulfide concentration detector, perform data analysis, and monitor the working condition of the hydrogen sulfide concentration detector; The analysis module includes a spatiotemporal feature acquisition unit, a model construction unit and a distribution map construction unit; The spatiotemporal feature acquisition unit is used to preprocess the detection data and acquire the spatiotemporal features of the detection data based on the evolutionary attention temporal graph convolutional network; The model building unit is used to obtain the hydrogen sulfide concentration distribution of each position node in the limited space based on the spatiotemporal characteristics, and to build a diffusion distribution model of hydrogen sulfide gas based on the hydrogen sulfide concentration distribution; The distribution map construction unit is used to obtain a hydrogen sulfide concentration distribution map based on the diffusion distribution model, and visualize the concentration distribution map to complete the analysis of the distribution characteristics of hydrogen sulfide gas in a limited space; Based on the input initial attention layer, different degrees of attention are given to the sliding sub-window feature matrix, the CRS algorithm is used to update the planned attention weight value, the graph convolutional neural network is used to learn the spatial characteristics of the detection data obtained by the hydrogen sulfide concentration detector, and the gated recurrent unit is used to learn the characteristics of gas concentration changing over time. The loss value between the predicted value and the true value is calculated to obtain a new attention layer; The method for obtaining the hydrogen sulfide concentration distribution map is: Based on the diffusion distribution model, the predicted value of hydrogen sulfide gas concentration is obtained, and normalized based on the maximum and minimum values ​​of the predicted value; Each position node in the limited space is used as a grid division node; Calculate the displacement of the prediction point with respect to the center point of the grid unit at time t; Based on the displacement, the weight value of each grid cell is calculated; Based on the weight value and the normalized predicted value, the average concentration distribution of the grid cell is calculated; Based on the average value of the concentration distribution of the grid cells, the hydrogen sulfide concentration distribution map is constructed; The control subsystem is used to receive the monitoring result and start and stop the spray subsystem based on the monitoring result; The spray subsystem is used to spray hydrogen sulfide remover based on the control of the control subsystem to achieve intelligent elimination of hydrogen sulfide in a limited space.

2. The intelligent elimination system for hydrogen sulfide in a limited space according to claim 1 is characterized in that: The control subsystem includes a signal receiving module and a PLC control unit; The signal receiving module is used to receive the over-limit signal; The PLC control unit is used to start and stop the spray subsystem based on the over-limit signal.

3. The intelligent elimination system for hydrogen sulfide in a limited space according to claim 2 is characterized in that: The spray subsystem includes a hydrogen sulfide remover storage unit and a spray unit; The hydrogen sulfide remover storage unit is used to store the prepared hydrogen sulfide remover; The spraying unit is used to spray the hydrogen sulfide remover based on the control of the PLC control unit to eliminate hydrogen sulfide in a limited space.

4. The intelligent elimination system for hydrogen sulfide in a limited space according to claim 2 is characterized in that: The hydrogen sulfide remover is prepared by using a complex iron catalyst, a biological inhibitor and an alkali agent.

5. The intelligent hydrogen sulfide elimination system in a limited space according to claim 3 is characterized in that: The spraying unit adopts a 30° ultrasonic nozzle. When the air pressure is 0.5MPa and the hydraulic pressure is 0.25MPa, the nozzle air consumption is 0.3m 3 / min, the liquid consumption is 3L / min, and the spray droplet size is 50-60μm.

6. A method for intelligently eliminating hydrogen sulfide in a confined space, implemented based on the intelligent system for eliminating hydrogen sulfide in a confined space according to any one of claims 1 to 5, characterized in that: The following steps are involved: Monitor the concentration of hydrogen sulfide in confined spaces and obtain monitoring results; Based on the monitoring results, hydrogen sulfide remover is sprayed to complete the intelligent elimination of hydrogen sulfide in the limited space.

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