Liquid catalyst and coal combustion efficiency improvement detection system thereof

Abstract

The invention discloses a liquid catalyst and a coal combustion efficiency improvement detection system thereof, and belongs to the technical field of coal chemical industry, the catalyst comprises active metal ions and other combustion performance adjusting substances, the activation energy of coal combustion can be reduced, and the combustion rate can be improved. Furthermore, according to the use requirement that the characteristics of all coal types are matched with the adaptability of the catalyst, in order to further optimize the proportion of all formulas of the catalyst, the invention provides a detection system for improving the coal combustion efficiency of the catalyst, the detection system comprises a plurality of test chambers, and the coal combustion efficiency of the catalyst is improved by accurately adjusting the test environment of the coal powder and the catalyst. According to the method, a high consistency test is provided, and a batch circulating test is adopted, so that the improvement effect of the catalyst on combustion of different coal types is quickly and efficiently verified, and the optimal proportion value of each component in the catalyst to a specific coal type is determined.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal chemical industry, and in particular, relates to a liquid catalyst and a detection system for improving coal combustion efficiency thereof. Background Art

[0002] As an important fossil energy, coal is widely used in power generation, metallurgy, chemical industry and other fields. However, the energy utilization efficiency of coal combustion is not high, and a large amount of pollutants such as carbon dioxide, carbon monoxide, nitrogen oxides and sulfur oxides are produced, which have a significant impact on the environment. Therefore, improving the combustion efficiency of coal and reducing pollutant emissions have become one of the key research directions of coal utilization technology today.

[0003] Traditional coal combustion technology has problems such as low burnout rate, slow combustion rate and high initial ignition point, which leads to waste of fuel resources and incomplete combustion. In addition, the differences in properties such as volatile matter, ash content and calorific value of different types of coal further increase the difficulty of improving combustion efficiency. Although some progress has been made in recent years by optimizing combustion equipment and improving combustion conditions, the application of coal activation energy is still in its initial stage and catalytic combustion technology is still in its early stages.

[0004] Liquid catalysts have become an important way to solve the problem of coal combustion due to their flexible formula, uniform spraying, and strong adaptability. By adding an appropriate amount of catalyst to coal powder, the combustion activation energy can be effectively reduced, the coal combustion rate can be accelerated, and the emission of carbon monoxide and unburned carbon can be reduced. However, there is currently a lack of systematic research and perfect detection methods for the preparation process of liquid catalysts and their mechanism of action on improving coal performance. Therefore, the development of an efficient liquid catalyst and a supporting performance detection system can not only optimize the coal combustion efficiency, but also provide technical support for energy conservation and emission reduction goals.

[0005] According to the relevant public technologies, the technical solution with announcement number CN102621286B proposes a test device for determining the optimal amount of catalyst, which measures the steam temperature and heat consumption in the boiler in real time during the production process, and adjusts the amount of catalyst added during coal combustion in real time; the technical solution with publication number US20230010507A1 proposes a technical solution for studying the influence of coal ash adhesion on the combustion effect, thereby optimizing the air intake setting in the furnace to ensure good combustion of coal powder; the technical solution with publication number 201432255A proposes a method for evaluating coal combustion efficiency, thereby calculating the feasibility of using specific biomass instead of coal for combustion.

[0006] The above technical solutions all propose various schemes for evaluating the combustion effect of coal. However, with the further deepening of chemical research and the improvement of environmental protection requirements, there is still greater room for improvement in the exploration of efficient combustion of coal.

[0007] The foregoing discussion of the background art is intended only to facilitate an understanding of the present invention. This discussion does not acknowledge or admit that any of the material referred to is part of the common general knowledge. Summary of the invention

[0008] The purpose of the present invention is to propose a liquid catalyst and a detection system for improving the combustion efficiency of coal, which belongs to the field of coal chemical technology. The catalyst includes active metal ions and other substances for regulating combustion performance, which can reduce the activation energy of coal combustion and increase the combustion rate. Furthermore, in response to the characteristics of each type of coal and the adaptability of the catalyst, in order to further optimize the ratio of each catalyst formula, a detection system for improving the combustion efficiency of the catalyst is proposed. The detection system includes multiple test chambers, which provide high consistency testing by accurately adjusting the test environment of coal powder and catalyst, and adopts batch cycle testing to quickly and efficiently verify the catalyst's effect on the combustion of different types of coal, so as to determine the optimized ratio of each component in the catalyst for a specific type of coal.

[0009] The present invention adopts the following technical scheme: a liquid catalyst, in which the components in the catalyst formula are configured as follows by mass percentage: pure water, 65% to 75%; sodium chloride, 3% to 7%; cobalt nitrate, 0.3% to 2.1%; lanthanum nitrate, 1.5% to 7.5%; nickel nitrate, 0.2% to 3.8%; zinc chloride, 1% to 5%; magnesium chloride, 2% to 8%; calcium chloride, 5% to 12%; cupric chloride, 0.5% to 4.5%; ferric citrate, 2% to 5%; sodium acetate, 3% to 10%; potassium iodide, 0.2% to 2.5%; urea, 1.5% to 5%; citric acid, 1.5% to 4.5%; potassium hydroxide, 3% to 7%.

[0010] Preferably, the catalyst is in liquid state at room temperature and is required to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.2.

[0011] At the same time, a detection system for improving the combustion efficiency of coal by a catalyst is proposed, and the detection system is used to detect the catalyst; the detection system determines the effects of catalysts prepared with the same formula ratio or different formula ratios on multiple types of coal through batch circulation to determine the catalyst formula ratio suitable for a specific type of coal; the detection system includes: a blowing device, a coal silo, a powder mixing machine, a mixer, a steady flow distributor and multiple test chambers, and pipelines for connecting the various components;

[0012] Wherein, the blowing device is configured to provide a driving airflow for the coal powder in the detection system, so that the coal powder and air are transported in the system, and to provide part of the air required for the coal powder combustion test;

[0013] The coal silo is configured to store the coal raw materials to be tested and quantitatively transport the coal raw materials to the coal blending machine;

[0014] The powder mixing machine is configured to crush the coal raw material into coal powder with a target particle size, and evenly spray the catalyst on the coal powder by spraying, so that the coal powder and the catalyst are fully mixed;

[0015] The mixer is configured to mix the airflow from the blowing device with the coal powder prepared by the powder mixing machine to form a coal powder airflow, and to convey the mixed coal powder airflow to the steady flow distributor;

[0016] The steady flow distributor is configured to have an airflow distribution function to achieve stable fluidization and uniform distribution of the coal powder airflow, and quantitatively distribute the coal powder airflow to a plurality of test chambers;

[0017] A plurality of the test chambers are connected to the steady flow distributor, each test chamber having a closed combustion space and configured to independently test the combustion performance of pulverized coal;

[0018] In addition, the detection system further comprises a control unit, wherein the control unit circuit is connected to various working modules, devices and / or elements in the detection system to control these working modules, devices and / or elements to work in coordination.

[0019] Preferably, the steady flow distributor is in the shape of a vertical cylinder and comprises:

[0020] The inlet section is connected to the mixer and is used to receive the mixed coal powder; the inlet section is in a gradually expanding trumpet shape;

[0021] The middle section is connected to the inlet section and is cylindrical. The average air flow velocity in the middle section is 1 to 2 m / s, and the cold flow field in the fluidized bed is used to reduce the fluctuation of the coal powder concentration and to retain part of the coal powder in the middle section by forming an internal circulation structure.

[0022] A spiral guide ridge is arranged on the inner wall of the middle section, and the guide ridge is in the form of a single spiral or a double spiral, which guides the airflow to generate a vortex effect, thereby further enhancing the suspension effect of the coal powder near the pipe wall;

[0023] The outlet section is connected to the middle section and has a tapered structure, which is used to accelerate the flow speed of the airflow and the coal powder, so that the coal powder airflow enters the downstream test chamber in a uniform and stable state;

[0024] The diversion structure is connected to the outlet section and is used to quantitatively distribute the coal powder airflow to multiple test chambers, wherein each diversion end is provided with a regulating valve for adjusting the airflow and coal powder distribution amount of each test chamber as needed.

[0025] Preferably, the test chamber comprises a top cover, a hopper at the bottom, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space;

[0026] Among them, a plurality of feeding ports are arranged on the middle wall of the test chamber, for receiving the coal powder airflow delivered by the steady flow distributor; an igniter is arranged at the center of the feeding port, for igniting the coal powder entering the test chamber;

[0027] The test chamber is also provided with a combustion auxiliary device, including a main air blowing port and an auxiliary air blowing port. The main air blowing port is located below the feeding port, and the auxiliary air blowing port is located above the feeding port. The outlet direction of the main air blowing port is consistent with the radial direction of the test chamber, and the outlet direction of the auxiliary air blowing port forms an angle β with the radial direction of the test chamber. By respectively providing air with larger momentum and air with smaller momentum, the flow and mixing of the combustion gas in the test chamber are optimized.

[0028] Preferably, the detection system includes a deviation value evaluation of the real-time detection results of the plurality of test chambers, so as to evaluate the detection results in the plurality of test chambers in a synchronous test to identify process anomalies or data anomalies therein.

[0029] The beneficial effects achieved by the present invention are:

[0030] 1. The catalyst of this technical solution has been tested and found to be able to reduce the activation energy of coal combustion by about 30%, reduce the oxygen consumption of coal combustion by about 20%, reduce the heat absorption of coal combustion by about 30%, reduce carbon oxide emissions by about 15%, increase the coal combustion rate by about 5%, change the screening characteristics of coal powder, inhibit the carcinogenic aromatic hydrocarbons produced by coal combustion by about 20%, and reduce the melting temperature of cement raw material calcination by about 100 degrees.

[0031] 2. The detection system of this technical solution can adapt to different types of coal, use a multi-test chamber architecture to achieve batch detection, evaluate the impact of catalysts on the performance of various coals, and optimize the formula ratio through real-time monitoring and data analysis. The design of the steady flow distributor and high-precision sensor ensures the uniformity and consistency of the test results, thereby improving the applicability of the solution and data reliability.

[0032] 3. Each working module in the detection system of this technical solution adopts a modular design, and the system maintenance and upgrade can be achieved by individually optimizing and replacing the working modules therein, thereby reducing subsequent use costs and upgrade costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0034] Explanation of the accompanying numbers: 2-blowing device; 4-coal silo; 6-powder mixing machine; 8-mixer; 10-steady flow distributor; 12-guiding ridge; 20-test chamber; 22-top cover; 24-hopper; 25-combustion space; 26-chamber wall; 28-air outlet; 50-control unit; 52-feeding port; 53-main air outlet; 54-auxiliary air outlet; 521-igniter; 700-computer system; 702-bus; 704-processor; 706-main memory; 708-read-only memory; 710-storage device; 712-display; 714-input device; 716-cursor control device; 718-network device;

[0035] Figure 1 Schematic diagram of the framework of the detection system described in the embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of the steady flow distributor described in an embodiment of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the feeding port described in an embodiment of the present invention;

[0038] Figure 4 is a schematic diagram of the structure of the test chamber described in an embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of a screenshot of a top view of the auxiliary air outlet in an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the architecture of a computer system used by the control unit in an embodiment of the present invention;

[0041] Figure 7 This is the experimental test report of the catalyst of the present invention at the Chinese Academy of Sciences. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with its embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of the present embodiment will become apparent. It is intended that all such additional systems, methods, features and advantages are included in this specification. Included within the scope of the present invention and protected by the appended claims. Additional features of the disclosed embodiments are described in the following detailed description, and these features will be apparent from the following detailed description.

[0043] The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right" and the like indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation. The invention is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are only used for exemplary description and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0044] Embodiment 1: Exemplarily, a liquid catalyst is proposed, in which the components are configured as follows by mass percentage: pure water, 65% to 75%; sodium chloride, 3% to 7%; cobalt nitrate, 0.3% to 2.1%; lanthanum nitrate, 1.5% to 7.5%; nickel nitrate, 0.2% to 3.8%; zinc chloride, 1% to 5%; magnesium chloride, 2% to 8%; calcium chloride, 5% to 12%; cupric chloride, 0.5% to 4.5%; ferric citrate, 2% to 5%; sodium acetate, 3% to 10%; potassium iodide, 0.2% to 2.5%; urea, 1.5% to 5%; citric acid, 1.5% to 4.5%; potassium hydroxide, 3% to 7%.

[0045] Preferably, the catalyst is in liquid state at room temperature and is required to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.2.

[0046] At the same time, a detection system for improving the combustion efficiency of coal by a catalyst is proposed, and the detection system is used to detect the catalyst; the detection system determines the effects of catalysts prepared with the same formula ratio or different formula ratios on multiple types of coal through batch circulation to determine the catalyst formula ratio suitable for a specific type of coal; the detection system includes: a blowing device, a coal silo, a powder mixing machine, a mixer, a steady flow distributor and multiple test chambers, and pipelines for connecting the various components;

[0047] Wherein, the blowing device is configured to provide a driving airflow for the coal powder in the detection system, so that the coal powder and air are transported in the system, and to provide part of the air required for the coal powder combustion test;

[0048] The coal silo is configured to store the coal raw materials to be tested and quantitatively transport the coal raw materials to the coal blending machine;

[0049] The powder mixing machine is configured to crush the coal raw material into coal powder with a target particle size, and evenly spray the catalyst on the coal powder by spraying, so that the coal powder and the catalyst are fully mixed;

[0050] The mixer is configured to mix the airflow from the blowing device with the coal powder prepared by the powder mixing machine to form a coal powder airflow, and to convey the mixed coal powder airflow to the steady flow distributor;

[0051] The steady flow distributor is configured to have an airflow distribution function to achieve stable fluidization and uniform distribution of the coal powder airflow, and quantitatively distribute the coal powder airflow to a plurality of test chambers;

[0052] A plurality of the test chambers are connected to the steady flow distributor, each test chamber having a closed combustion space and configured to independently test the combustion performance of pulverized coal;

[0053] In addition, the detection system further comprises a control unit, wherein the control unit circuit is connected to various working modules, devices and / or elements in the detection system to control these working modules, devices and / or elements to work in coordination.

[0054] Preferably, the steady flow distributor is in the shape of a vertical cylinder and comprises:

[0055] The inlet section is connected to the mixer and is used to receive the mixed coal powder; the inlet section is in a gradually expanding trumpet shape;

[0056] The middle section is connected to the inlet section and is cylindrical. The average air flow velocity in the middle section is 1 to 2 m / s, and the cold flow field in the fluidized bed is used to reduce the fluctuation of the coal powder concentration and to retain part of the coal powder in the middle section by forming an internal circulation structure.

[0057] A spiral guide ridge is arranged on the inner wall of the middle section, and the guide ridge is in the form of a single spiral or a double spiral, which guides the airflow to generate a vortex effect, thereby further enhancing the suspension effect of the coal powder near the pipe wall;

[0058] The outlet section is connected to the middle section and has a tapered structure, which is used to accelerate the flow speed of the airflow and the coal powder, so that the coal powder airflow enters the downstream test chamber in a uniform and stable state;

[0059] The diversion structure is connected to the outlet section and is used to quantitatively distribute the coal powder airflow to multiple test chambers, wherein each diversion end is provided with a regulating valve for adjusting the airflow and coal powder distribution amount of each test chamber as needed.

[0060] Preferably, the test chamber comprises a top cover, a hopper at the bottom, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space;

[0061] Among them, a plurality of feeding ports are arranged on the middle wall of the test chamber, for receiving the coal powder airflow delivered by the steady flow distributor; an igniter is arranged at the center of the feeding port, for igniting the coal powder entering the test chamber;

[0062] The test chamber is also provided with a combustion auxiliary device, including a main air blowing port and an auxiliary air blowing port. The main air blowing port is located below the feeding port, and the auxiliary air blowing port is located above the feeding port. The outlet direction of the main air blowing port is consistent with the radial direction of the test chamber, and the outlet direction of the auxiliary air blowing port forms an angle β with the radial direction of the test chamber. By respectively providing air with larger momentum and air with smaller momentum, the flow and mixing of the combustion gas in the test chamber are optimized.

[0063] Preferably, the detection system includes a deviation value evaluation of the real-time detection results of the plurality of test chambers, so as to evaluate the detection results in the plurality of test chambers in a synchronous test to identify process anomalies or data anomalies therein.

[0064] In an exemplary embodiment, the following components are included as active metal ion providers: lanthanum nitrate, nickel nitrate, cobalt nitrate, zinc chloride, magnesium chloride, calcium chloride, cupric chloride, and ferric citrate; the above components can participate in the combustion reaction of coal and reduce the activation energy and enhance the catalytic effect by providing active metal ions, and the redox reaction during the combustion process helps to reduce the activation energy and increase the combustion rate.

[0065] In an exemplary embodiment, sodium chloride, magnesium chloride, calcium chloride, and copper chloride are used as co-solvents and stabilizers to adjust the solubility and stability of the solution to ensure the consistency of the catalyst during storage and application. The above substances can help maintain ion balance in the solution, avoid precipitation or crystallization between catalyst components, and ensure the stability of the catalyst during use.

[0066] In an exemplary embodiment, urea and potassium iodide, as reducing agents and oxidizing agents, can adjust the redox balance in coal combustion by providing or consuming oxygen; wherein, urea can decompose to generate nitrides during the combustion process, which plays a role in assisting combustion and reducing the generation of oxygen compounds; potassium iodide can promote the redox reaction of carbon at high temperature and improve combustion efficiency.

[0067] In an exemplary embodiment, the catalyst preparation process includes adding a pH regulator to adjust the pH value of the catalyst to ensure that it is in an optimal chemically active state during the combustion process; potassium hydroxide, as an alkaline substance, can significantly increase the alkalinity of the catalyst solution; citric acid, as a weak acid, can provide buffering capacity to ensure that the pH value of the catalyst remains in the range of 5-7.

[0068] In an exemplary embodiment, complexing agents and chelating agents are added during the catalyst preparation process to form complexes with metal ions, prevent the precipitation of metal ions, and ensure the uniformity of the catalyst; in particular, citric acid has a strong chelating ability, which can stabilize metal ions, avoid precipitation during storage, and improve the overall activity and stability of the catalyst.

[0069] In an exemplary embodiment, a combustion aid is used to assist the combustion reaction of coal and increase the combustion rate of coal, wherein sodium acetate can be decomposed to generate active substances during the combustion process, enhance the activity of the combustion reaction, and increase the heat release during the combustion of coal.

[0070] Furthermore, the different ratios of the components in the catalyst can be adjusted, and individual adjustments can be made according to the characteristics of each coal raw material production area or type to further improve the effect of the catalyst. Therefore, this technical solution further proposes a catalyst enhancement effect detection system based on the catalyst proposed in this technical solution.

[0071] As attached Figure 1 As shown, a schematic diagram of the structure layout of the detection system is exemplarily shown; the detection system includes a blowing device 2, a coal bunker 4, a powder mixing machine 6, a mixer 8, a steady flow distributor 10 and a plurality of test chambers 20 (two are exemplarily shown in the figure) and corresponding connecting pipes;

[0072] In addition, the detection system also includes a control unit (not shown in the figure), and the control unit circuit is connected to each working module, device and / or element in the detection system to control these working modules, devices and / or elements to work in coordination.

[0073] Preferably, after the coal raw material falls from the coal silo 4, it is ground by the powder batching machine 6 to obtain coal powder with a specified particle size; at the same time, a turning mechanism is arranged inside the powder batching machine 6; the turning mechanism continuously turns the coal powder to avoid coal powder agglomeration; at the same time, the powder batching machine 6 has multiple nozzles to spray the catalyst on the coal powder in the form of a spray, and the atomized catalyst is further evenly mixed with the coal powder through the turning mechanism; and the powder batching machine 6 includes weighing the coal powder to be output, and then conveying the specified weight of coal powder to the mixer 8 through a docking pipe.

[0074] Preferably, the size of the coal powder produced by the powder mixing machine 6 is 300 μm or less;

[0075] Preferably, the mixer 8 is used to mix the airflow from the blowing device 2 with the coal powder mixed from the powder mixing machine 6, and then transport it through the coal powder pipeline to enter the steady flow distributor 10 from the bottom end of the steady flow distributor 10.

[0076] Further, as attached Figure 2As shown, the steady flow distributor 10 is in the shape of a vertically placed cylinder, and its lower inlet section is in the shape of a trumpet opening; the circular cross-sectional area of ​​the middle section becomes larger after the inlet section is expanded. The average wind speed in the middle section of the steady flow distributor 10 is 1-2 m / s, so that a cold flow field similar to that in a fluidized bed is formed in the middle section. The coal powder in the middle section rises with the airflow, and the coal powder forms a film-like descent near the pipe wall. Part of the coal powder is dynamically retained in the middle section to form an internal circulation, forming a fluidized bed, and reducing the change in the amount of coal powder entering the burner caused by the fluctuation of the inlet coal powder concentration.

[0077] Furthermore, a spiral guide ridge 12 is provided on the tube wall inside the flow stabilizing distributor 10; preferably, the guide ridge has a raised height of 10 to 15 cm; the guide ridge can be in the form of a single spiral or a double spiral; through the action of the guide ridge, the airflow in the middle section of the flow stabilizing distributor 10 further generates a certain vortex inside, and the coal powder can produce a stronger suspension effect at a position close to the tube wall.

[0078] Furthermore, the outlet section of the steady flow distributor 10 is gradually narrowed again, and the contraction of the inner diameter makes the airflow velocity accelerate again, and finally reaches the normal supply wind speed in the test chamber 20; preferably, the contraction angle of the outlet section is 20 to 30 degrees; the airflow is first accelerated in the outlet section, and the coal powder is accelerated synchronously when driven by the airflow. In the section where the outlet section connects to the test chamber 20 and at the nozzle of the test chamber 20, the airflow velocity is still higher than the coal powder velocity, which increases the residence time of the coal powder, is conducive to the ignition and full combustion of the coal powder, and ensures the uniformity of the test data.

[0079] Further, as attached Figure 4 , which illustrates an exemplary embodiment of the test chamber;

[0080] The test chamber 20 includes a top cover 22 at the top, a hopper 24 at the bottom, and a chamber wall 26 surrounding the top cover 22 and the hopper 24 to form a closed combustion space 25; the combustion gas generated in the combustion space 25 flows from bottom to top and is finally discharged at the air outlet 28;

[0081] Preferably, a plurality of feed ports 52 are installed in the lower portion of the test chamber 20; preferably, the plurality of feed ports 52 are evenly arranged at a plurality of positions on the chamber wall 26 to form a plurality of points around the combustion space 25 for feeding coal powder into the test chamber 20 and igniting the coal powder at the time of feeding; in some embodiments, the plurality of feed ports 52 are installed on the front chamber wall and the rear chamber wall of the test chamber 20, and the plurality of feed ports 52 are arranged relative to each other.

[0082] Further, in a preferred embodiment, the feed port 52 is structured as shown in the attached Figure 3As shown; the feed port 52 is in the shape of a pipe and is connected to one of the diversion ends of the steady flow distributor 10; the coal powder of known mass mixed with the catalyst enters the test chamber through the feed port 52 along with the output airflow of the steady flow distributor 10. Preferably, an igniter 521 is provided at the front end of the feed port 52, and preferably, the ignition element 521 is located in the center of the feed port 52; preferably, the feed port 52 can be a plasma igniter to form a flame 53 with highly controllable temperature and combustion characteristics. As the coal powder in the feed port 52 is ejected, the control unit controls the ignition element 521 to ignite the ejected coal powder in a timely manner to ignite the coal powder, so that the coal powder continues to burn in the test chamber 20.

[0083] Preferably, a plurality of main air outlets 53 are provided below the feeding port 52, and a plurality of auxiliary air outlets 54 are provided above the feeding port 52; the main air outlets 53 and the auxiliary air outlets 54 are connected to an additional blower different from the blowing device to achieve independent control of the air volume of the two.

[0084] The outlet directions of the main air outlet 53 and the auxiliary air outlet 54 are the same, and both have a horizontal angle α with the horizontal direction and face upward; the difference is that the outlet direction of the main air outlet 53 is the same as the radial direction of the test chamber 20; while the outlet direction of the auxiliary air outlet 54 has an angle β with the radial direction of the test chamber 20, as shown in the attached figure. Figure 5 It is a top cross-sectional view of the auxiliary air blowing port 54.

[0085] The air delivered by the main air outlet 53 and the auxiliary air outlet 54 is mainly used to supplement the air delivered by the feeding port 52 into the test chamber 20. Since the air of the feeding port 52 is mainly used to transport the coal powder, and based on the requirements of the test, it is hoped that the objective conditions during the test are roughly uniform. Therefore, if the air flow rate and flow velocity of the feeding port 52 are set too high, it is easy to cause a large standard deviation of the state parameters such as weight and flow velocity each time the coal powder enters the test chamber 20, thereby affecting the reference consistency of the test.

[0086] Among them, the main air outlet 53 ejects air with a large momentum that can reach the center of the test chamber 20, and the auxiliary air outlet 54 ejects air with a small momentum toward the wall of the test chamber 20. Through the above arrangement, the auxiliary air outlet 54 supplies air to the wall of the test chamber 20, forming a certain circulation above the test chamber 20, so that the combustion gas rising from the bottom of the test chamber 20 is retained to a certain extent, and the flow rate of the combustion gas rising near the wall is reduced. At the same time, the flow of the blast air supplied by the main air outlet 53 will not be disturbed by the combustion gas near the furnace wall, and can be supplied to the center of the test chamber 20.

[0087] In addition, when the auxiliary air blowing port 54 is provided, the combustion gas rising from the bottom of the combustion space 25 is mixed with the jet of the main secondary air port, but a part of it passes through between the main secondary air ports. The unburned gas that passes through, in the downstream of the main secondary air port, has its rising speed reduced and stagnated. Therefore, when the auxiliary secondary air port is used to supply the auxiliary secondary air in the stagnant area, the mixing of the combustion gas and the air near the furnace wall can be promoted.

[0088] Preferably, one or more oxygen concentration sensors are provided in the test chamber 20 for detecting the oxygen concentration in the space of the test chamber 20. Furthermore, according to the test requirements, the control unit can be set to adjust the air intake of the plurality of main air ports 53 and the auxiliary air ports 54 respectively according to the signal from the oxygen concentration sensor. For example, according to the signal from the plurality of oxygen concentration detectors, when the oxygen concentration at the central position of the combustion chamber is low, the air intake of the main air port 53 is increased while the air intake of the auxiliary air port 54 is appropriately reduced; and when the oxygen concentration near the furnace wall is low, the air intake of the auxiliary air port 54 is increased.

[0089] Through the above settings, the following effects can be achieved:

[0090] (1) Ensure stable test environment conditions when measuring coal sample properties in small batches and multiple times;

[0091] (2) Ensure that the pulverized coal can be burned fully and evenly;

[0092] (3) It is ensured that the ignition conditions of the coal powder can be determined and controlled by the setting of the igniter.

[0093] Embodiment 2: This embodiment should be understood to include at least all the features of any one of the aforementioned embodiments and to be further improved thereon.

[0094] In order to further measure various performance data of the coal powder sample, such as the combustion rate, the initial ignition point, and the final ignition point, a plurality of sensors may be configured inside and outside the test chamber 20 .

[0095] Preferably, during the transmission process from the steady flow distributor 10 to the test chamber 20, a high-precision mass flow meter is configured to measure the mass flow rate of the coal powder entering the test chamber in real time; an ash collector and a mass sensor are configured in the hopper 24 of each of the test chambers 20 to collect the ash generated after combustion and measure the weight of the ash in real time;

[0096] Preferably, a flue gas analyzer is provided in the air outlet 28 of the test chamber 20 for measuring the concentration of CO and CO2 generated during the combustion process, and a flue gas collection device is provided at the end of the air outlet 28 for collecting the amount of CO2 generated to calculate the combustion rate of the pulverized coal sample according to the following calculation formula, namely:

[0097] Combustion rate = weight of CO2 generated by combustion / theoretical weight of CO2 × 100%.

[0098] At the same time, the flue gas collection device can be used to calculate NO x and SO x to determine the extent of release of such gases.

[0099] Furthermore, a high frame rate infrared thermal imager is provided outside the test chamber 20, and the generation time of the flame is detected by image detection in the feeding port 52 through the observation window, and the temperature distribution and time point of the flame are recorded, and the initial ignition point and the final ignition point are calculated in combination with the temperature data of the temperature sensor in the combustion space 25;

[0100] Furthermore, the time when the CO concentration approaches zero is detected by the flue gas analyzer at the air outlet 28. When the CO concentration approaches zero, the time node of the final ignition point can be confirmed.

[0101] Furthermore, in a preferred embodiment, in order to evaluate the uniformity performance of the test data of multiple test chambers 20 in real time so as to timely adjust or stop the detection when the test conditions fluctuate, the detection system includes executing a process monitoring step to evaluate the average performance of multiple test chambers 20 under the same conditions.

[0102] Exemplarily, taking the distribution mass flow of the coal powder sample in each test chamber as an example, the following process monitoring steps are performed:

[0103] S100: monitoring key parameters, including measuring the mass and flow rate of the pulverized coal entering each test chamber, monitoring the air flow velocity, and monitoring the mass concentration of the pulverized coal in the air flow.

[0104] S200: Record multiple monitoring data based on time series, and perform real-time calculations in combination with the following sub-steps:

[0105] S210: Calculate the total flow rate of the total output coal powder sample, that is, by measuring the total coal powder mass flow rate output from the steady flow distributor 10:

[0106]

[0107] Where n is the number of test rooms used in this test; m i is the mass flow rate of pulverized coal entering the i-th test chamber.

[0108] S220: Calculate the actual allocation ratio P of each test room i and the ideal distribution ratio P ideal :

[0109]

[0110]

[0111] S230: Calculate the distribution uniformity σ:

[0112]

[0113] When σ approaches zero, the uniformity is better, and an upper limit value σ needs to be set. max , in order to achieve when σ is greater than σ max , stop this detection and check whether the steady flow distributor 10 works abnormally.

[0114] Based on the phenomenon of uneven distribution, multiple implementation details of the steady flow distributor 10 may be checked and / or adjusted accordingly, for example:

[0115] Adjust the guide ridge design to optimize the angle or number of spiral guide ridges inside the steady flow distributor 10;

[0116] Airflow balancing valve control: add a dynamic airflow regulating valve to each diversion pipeline to adjust the airflow according to real-time detection data;

[0117] Other intelligent adjustments, such as transmitting monitoring data to the control unit and using algorithms to dynamically adjust the airflow pressure or direction in the distributor.

[0118] The following uniformity calculation can also be used for monitoring other detection indicators, so that the detection can be terminated in time when a certain indicator shows large fluctuations in uniformity.

[0119] Embodiment 3: This embodiment should be understood to include at least all the features of any of the above embodiments, and further improve upon them;

[0120] For example, as shown in the attached Figure 6 As shown, the implementation of the computer system 700 used by the control unit in the detection system is described; the computer system 700 can be applied to the data storage, calculation and result output process of each working module in the recognition and judgment system;

[0121] Illustratively, computer system 700 includes a bus 702 or other communication mechanism for communicating information, one or more processors 704 coupled to bus 702 for processing information; processor 704 may be, for example, one or more general-purpose microprocessors;

[0122] The computer system 700 also includes a main memory 706, such as a random access memory (RAM), cache, and / or other dynamic storage device, coupled to the bus 702 for storing information and instructions to be executed by the processor 704; the main memory 706 may also be used to store temporary variables or other intermediate information during the execution of instructions to be executed by the processor 704; these instructions, when stored in a storage medium accessible to the processor 704, present the computer system 700 as a special-purpose machine customized to perform the operations specified in the instructions;

[0123] The computer system 700 may also include a read-only memory (ROM) 708 or other static storage device coupled to the bus 702 for storing static information and instructions for the processor 704; a storage device 710 such as a disk, an optical disk, or a USB drive (flash drive) will be coupled to the bus 702 for storing information and instructions;

[0124] And further, coupled to the bus 702 may also include a display 712 for displaying various information, data, media, etc., an input device 714 for allowing a user of the computer system 700 to control, manipulate, and / or interact with the computer system 700;

[0125] A preferred way to interact with the management system may be through a cursor control device 716, such as a computer mouse or similar control / navigation mechanism;

[0126] Furthermore, the computer system 700 may also include a network device 718 coupled to the bus 702; wherein the network device 718 may include, for example, a wired network card, a wireless network card, a switching chip, a router, a switch, and other components;

[0127] In general, the terms "engine", "component", "system", "database", etc., as used herein, may refer to logic embodied in hardware or firmware, or to a collection of software instructions, possibly with entry and exit points, written in a programming language such as Java, C, or C++; software components may be compiled and linked into executable programs, installed in a dynamic link library, or may be written in an interpreted programming language (e.g., BASIC, Perl, or Python); it should be understood that software components may be called from other components or from themselves, and / or may be called in response to detected events or interrupts;

[0128] Software components configured to execute on a computing device may be provided on a computer-readable medium, such as a compact disc, digital video disc, flash drive, diskette, or any other tangible medium, or as a digital download (and may be initially stored in a compressed or installable format that requires installation, decompression, or decryption prior to execution); such software code may be stored in part or in whole on a memory device of the executing computing device for execution by the computing device; software instructions may be embedded in firmware, such as an EPROM; it is also understood that hardware components may be composed of connected logic units (such as gates and flip-flops), and / or may be composed of programmable units (such as programmable gate arrays or processors);

[0129] Computer system 700 includes custom hardwired logic, one or more ASICs or FPGAs, firmware, and / or program logic that, in combination with the computer system, renders computer system 700 a special-purpose computing device;

[0130] According to one or more embodiments, the techniques herein may be performed by computer system 700 in response to processor 704 executing one or more sequences of one or more instructions contained in main memory 706; such instructions may be read into main memory 706 from another storage medium, such as storage device 710; execution of the sequences of instructions contained in main memory 706 causes processor 704 to perform the process steps described herein; in alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions;

[0131] As used herein, the term "non-transitory media" and similar terms refer to any media that store data and / or instructions that cause a machine to operate in a specific manner; such non-transitory media may include non-volatile media and / or volatile media; non-volatile media include, for example, optical or magnetic disks, such as storage device 710; volatile media include dynamic memory, such as main memory 706;

[0132] Among them, common forms of non-transitory media include, for example, floppy disks, diskettes, hard disks, solid-state drives, magnetic tapes or any other magnetic data storage medium, CD-ROMs, any other optical data storage medium, any physical medium having a pattern of holes, RAM, PROM and EPROM, FLASH-EPROM, NVRAM, any other memory chip or cartridge, and network versions thereof;

[0133] Non-transient media are distinct from transmission media but may be used in conjunction with transmission media; transmission media participate in the transmission of information between non-transient media; for example, transmission media include coaxial cables, copper wires, and optical fibers, including the wires that make up bus 702; transmission media may also take the form of sound waves or light waves, such as radio waves and infrared data communications.

[0134] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. In addition, the elements therein may be updated as the technology develops, i.e., many elements are examples and do not limit the scope of the present disclosure or claims.

[0135] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0136] In summary, it is intended that the above detailed description is considered to be illustrative rather than restrictive, and it should be understood that the above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the contents of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A liquid catalyst, characterized in that In the formula of the catalyst, the components are configured as follows according to mass percentage: pure water, 65% to 75%; sodium chloride, 3% to 7%; cobalt nitrate, 0.3% to 2.1%; lanthanum nitrate, 1.5% to 7.5%; nickel nitrate, 0.2% to 3.8%; zinc chloride, 1% to 5%; magnesium chloride, 2% to 8%; calcium chloride, 5% to 12%; cupric chloride, 0.5% to 4.5%; ferric citrate, 2% to 5%; sodium acetate, 3% to 10%; potassium iodide, 0.2% to 2.5%; urea, 1.5% to 5%; citric acid, 1.5% to 4.5%; potassium hydroxide, 3% to 7%.

2. The catalyst according to claim 1, characterized in that The catalyst is in liquid state at room temperature and is required to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.

2.

3. A detection system for improving the combustion efficiency of coal by using a catalyst, characterized in that: The detection system is used to detect the catalyst as claimed in claim 2; the detection system measures the effects of catalysts prepared with the same formula ratio or different formula ratios on multiple types of coal through batch circulation to determine the catalyst formula ratio suitable for a specific type of coal; The detection system includes: an air blowing device, a coal bunker, a powder mixing machine, a mixer, a steady flow distributor and a plurality of test chambers, and pipelines for connecting the components; Wherein, the blowing device is configured to provide a driving airflow for the coal powder in the detection system, so that the coal powder and air are transported in the system, and to provide part of the air required for the coal powder combustion test; The coal silo is configured to store the coal raw materials to be tested and quantitatively transport the coal raw materials to the coal blending machine; The powder mixing machine is configured to crush the coal raw material into coal powder with a target particle size, and evenly spray the catalyst on the coal powder by spraying, so that the coal powder and the catalyst are fully mixed; The mixer is configured to mix the airflow from the blowing device with the coal powder prepared by the powder mixing machine to form a coal powder airflow, and to convey the mixed coal powder airflow to the steady flow distributor; The steady flow distributor is configured to have an airflow distribution function to achieve stable fluidization and uniform distribution of the coal powder airflow, and quantitatively distribute the coal powder airflow to a plurality of test chambers; A plurality of the test chambers are connected to the steady flow distributor, each test chamber having a closed combustion space and configured to independently test the combustion performance of pulverized coal; In addition, the detection system further comprises a control unit, wherein the control unit circuit is connected to various working modules, devices and / or elements in the detection system to control these working modules, devices and / or elements to work in coordination.

4. The detection system according to claim 3, characterized in that: The steady flow distributor is in the shape of a vertical cylinder and comprises: The inlet section is connected to the mixer and is used to receive the mixed coal powder; the inlet section is in a gradually expanding trumpet shape; The middle section is connected to the inlet section and is cylindrical. The average air flow velocity in the middle section is 1 to 2 m / s, and the cold flow field in the fluidized bed is used to reduce the fluctuation of the coal powder concentration and to retain part of the coal powder in the middle section by forming an internal circulation structure. A spiral guide ridge is arranged on the inner wall of the middle section, and the guide ridge is in the form of a single spiral or a double spiral, which guides the airflow to generate a vortex effect, thereby further enhancing the suspension effect of the coal powder near the pipe wall; The outlet section is connected to the middle section and has a tapered structure, which is used to accelerate the flow speed of the airflow and the coal powder, so that the coal powder airflow enters the downstream test chamber in a uniform and stable state; The diversion structure is connected to the outlet section and is used to quantitatively distribute the coal powder airflow to multiple test chambers, wherein each diversion end is provided with a regulating valve for adjusting the airflow and coal powder distribution amount of each test chamber as needed.

5. The detection system according to claim 4, characterized in that: The test chamber comprises a top cover, a hopper at the bottom, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space; Among them, a plurality of feeding ports are arranged on the middle wall of the test chamber, for receiving the coal powder airflow delivered by the steady flow distributor; an igniter is arranged at the center of the feeding port, for igniting the coal powder entering the test chamber; The test chamber is also provided with a combustion auxiliary device, including a main air blowing port and an auxiliary air blowing port. The main air blowing port is located below the feeding port, and the auxiliary air blowing port is located above the feeding port. The outlet direction of the main air blowing port is consistent with the radial direction of the test chamber, and the outlet direction of the auxiliary air blowing port forms an angle β with the radial direction of the test chamber. By respectively providing air with larger momentum and air with smaller momentum, the flow and mixing of the combustion gas in the test chamber are optimized.

6. The detection system according to claim 5, characterized in that: The detection system includes a deviation value evaluation of the real-time detection results of the plurality of test chambers, so as to evaluate the detection results in the plurality of test chambers in a synchronous test, so as to identify process anomalies or data anomalies therein.

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